Line data Source code
1 : /******************************************************************************
2 : *
3 : * Project: Mapinfo Image Warper
4 : * Purpose: Implementation of one or more GDALTrasformerFunc types, including
5 : * the GenImgProj (general image reprojector) transformer.
6 : * Author: Frank Warmerdam, warmerdam@pobox.com
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2002, i3 - information integration and imaging
10 : * Fort Collin, CO
11 : * Copyright (c) 2008-2013, Even Rouault <even dot rouault at spatialys.com>
12 : * Copyright (c) 2021, CLS
13 : *
14 : * SPDX-License-Identifier: MIT
15 : ****************************************************************************/
16 :
17 : #include "cpl_port.h"
18 : #include "gdal_alg.h"
19 : #include "gdal_alg_priv.h"
20 :
21 : #include <climits>
22 : #include <cmath>
23 : #include <cstddef>
24 : #include <cstdlib>
25 : #include <cstring>
26 :
27 : #include <algorithm>
28 : #include <limits>
29 : #include <utility>
30 :
31 : #include "cpl_conv.h"
32 : #include "cpl_error.h"
33 : #include "cpl_list.h"
34 : #include "cpl_minixml.h"
35 : #include "cpl_multiproc.h"
36 : #include "cpl_string.h"
37 : #include "cpl_vsi.h"
38 : #include "gdal.h"
39 : #include "gdal_priv.h"
40 : #include "ogr_core.h"
41 : #include "ogr_spatialref.h"
42 : #include "ogr_srs_api.h"
43 :
44 : CPL_C_START
45 : void *GDALDeserializeGCPTransformer(CPLXMLNode *psTree);
46 : void *GDALDeserializeTPSTransformer(CPLXMLNode *psTree);
47 : void *GDALDeserializeGeoLocTransformer(CPLXMLNode *psTree);
48 : void *GDALDeserializeRPCTransformer(CPLXMLNode *psTree);
49 : void *GDALDeserializeHomographyTransformer(CPLXMLNode *psTree);
50 : CPL_C_END
51 :
52 : static CPLXMLNode *GDALSerializeReprojectionTransformer(void *pTransformArg);
53 : static void *GDALDeserializeReprojectionTransformer(CPLXMLNode *psTree);
54 :
55 : static CPLXMLNode *GDALSerializeGenImgProjTransformer(void *pTransformArg);
56 : static void *GDALDeserializeGenImgProjTransformer(CPLXMLNode *psTree);
57 :
58 : static void *GDALCreateApproxTransformer2(GDALTransformerFunc pfnRawTransformer,
59 : void *pRawTransformerArg,
60 : double dfMaxErrorForward,
61 : double dfMaxErrorReverse);
62 :
63 : /************************************************************************/
64 : /* GDALIsTransformer() */
65 : /************************************************************************/
66 :
67 17011 : bool GDALIsTransformer(void *hTransformerArg, const char *pszClassName)
68 : {
69 17011 : if (!hTransformerArg)
70 812 : return false;
71 : // All transformers should have a GDALTransformerInfo member as their first members
72 16199 : GDALTransformerInfo *psInfo =
73 : static_cast<GDALTransformerInfo *>(hTransformerArg);
74 16199 : return memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
75 31504 : strlen(GDAL_GTI2_SIGNATURE)) == 0 &&
76 31504 : strcmp(psInfo->pszClassName, pszClassName) == 0;
77 : }
78 :
79 : /************************************************************************/
80 : /* GDALTransformFunc */
81 : /* */
82 : /* Documentation for GDALTransformFunc typedef. */
83 : /************************************************************************/
84 :
85 : /*!
86 :
87 : \typedef typedef int (*GDALTransformerFunc)( void *pTransformerArg, int
88 : bDstToSrc, int nPointCount, double *x, double *y, double *z, int *panSuccess );
89 :
90 : Generic signature for spatial point transformers.
91 :
92 : This function signature is used for a variety of functions that accept
93 : passed in functions used to transform point locations between two coordinate
94 : spaces.
95 :
96 : The GDALCreateGenImgProjTransformer(), GDALCreateReprojectionTransformerEx(),
97 : GDALCreateGCPTransformer() and GDALCreateApproxTransformer() functions can
98 : be used to prepare argument data for some built-in transformers. As well,
99 : applications can implement their own transformers to the following signature.
100 :
101 : \code
102 : typedef int
103 : (*GDALTransformerFunc)( void *pTransformerArg,
104 : int bDstToSrc, int nPointCount,
105 : double *x, double *y, double *z, int *panSuccess );
106 : \endcode
107 :
108 : @param pTransformerArg application supplied callback data used by the
109 : transformer.
110 :
111 : @param bDstToSrc if TRUE the transformation will be from the destination
112 : coordinate space to the source coordinate system, otherwise the transformation
113 : will be from the source coordinate system to the destination coordinate system.
114 :
115 : @param nPointCount number of points in the x, y and z arrays.
116 :
117 : @param[in,out] x input X coordinates. Results returned in same array.
118 :
119 : @param[in,out] y input Y coordinates. Results returned in same array.
120 :
121 : @param[in,out] z input Z coordinates. Results returned in same array.
122 :
123 : @param[out] panSuccess array of ints in which success (TRUE) or failure (FALSE)
124 : flags are returned for the translation of each point. Must not be NULL.
125 :
126 : @return TRUE if all points have been successfully transformed (changed in 3.11,
127 : previously was TRUE if some points have been successfully transformed)
128 :
129 : */
130 :
131 : /************************************************************************/
132 : /* GDALSuggestedWarpOutput() */
133 : /************************************************************************/
134 :
135 : /**
136 : * Suggest output file size.
137 : *
138 : * This function is used to suggest the size, and georeferenced extents
139 : * appropriate given the indicated transformation and input file. It walks
140 : * the edges of the input file (approximately 20 sample points along each
141 : * edge) transforming into output coordinates in order to get an extents box.
142 : *
143 : * Then a resolution is computed with the intent that the length of the
144 : * distance from the top left corner of the output imagery to the bottom right
145 : * corner would represent the same number of pixels as in the source image.
146 : * Note that if the image is somewhat rotated the diagonal taken isn't of the
147 : * whole output bounding rectangle, but instead of the locations where the
148 : * top/left and bottom/right corners transform. The output pixel size is
149 : * always square. This is intended to approximately preserve the resolution
150 : * of the input data in the output file.
151 : *
152 : * The values returned in padfGeoTransformOut, pnPixels and pnLines are
153 : * the suggested number of pixels and lines for the output file, and the
154 : * geotransform relating those pixels to the output georeferenced coordinates.
155 : *
156 : * The trickiest part of using the function is ensuring that the
157 : * transformer created is from source file pixel/line coordinates to
158 : * output file georeferenced coordinates. This can be accomplished with
159 : * GDALCreateGenImgProjTransformer() by passing a NULL for the hDstDS.
160 : *
161 : * @param hSrcDS the input image (it is assumed the whole input image is
162 : * being transformed).
163 : * @param pfnTransformer the transformer function.
164 : * @param pTransformArg the callback data for the transformer function.
165 : * @param padfGeoTransformOut the array of six doubles in which the suggested
166 : * geotransform is returned.
167 : * @param pnPixels int in which the suggest pixel width of output is returned.
168 : * @param pnLines int in which the suggest pixel height of output is returned.
169 : *
170 : * @return CE_None if successful or CE_Failure otherwise.
171 : */
172 :
173 39 : CPLErr CPL_STDCALL GDALSuggestedWarpOutput(GDALDatasetH hSrcDS,
174 : GDALTransformerFunc pfnTransformer,
175 : void *pTransformArg,
176 : double *padfGeoTransformOut,
177 : int *pnPixels, int *pnLines)
178 :
179 : {
180 39 : VALIDATE_POINTER1(hSrcDS, "GDALSuggestedWarpOutput", CE_Failure);
181 :
182 39 : double adfExtent[4] = {};
183 :
184 39 : return GDALSuggestedWarpOutput2(hSrcDS, pfnTransformer, pTransformArg,
185 : padfGeoTransformOut, pnPixels, pnLines,
186 39 : adfExtent, 0);
187 : }
188 :
189 715 : static bool GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
190 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
191 : int /* nPixels*/, int nLines, double dfPixelSizeX, double dfPixelSizeY)
192 : {
193 715 : double adfX[21] = {};
194 715 : double adfY[21] = {};
195 :
196 715 : const double dfMaxXOut = padfExtent[2];
197 715 : const double dfMaxYOut = padfExtent[3];
198 :
199 : // Take 20 steps.
200 715 : int nSamplePoints = 0;
201 15730 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
202 : {
203 : // Ensure we end exactly at the end.
204 15015 : if (dfRatio > 0.99)
205 715 : dfRatio = 1.0;
206 :
207 : // Along right.
208 15015 : adfX[nSamplePoints] = dfMaxXOut;
209 15015 : adfY[nSamplePoints] = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
210 15015 : nSamplePoints++;
211 : }
212 715 : double adfZ[21] = {};
213 :
214 715 : int abSuccess[21] = {};
215 :
216 715 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
217 : abSuccess);
218 :
219 715 : int abSuccess2[21] = {};
220 :
221 715 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
222 : abSuccess2);
223 :
224 715 : nSamplePoints = 0;
225 715 : int nBadCount = 0;
226 15730 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
227 : {
228 15015 : const double expected_x = dfMaxXOut;
229 15015 : const double expected_y = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
230 15015 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
231 12011 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
232 10637 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
233 : {
234 4378 : nBadCount++;
235 : }
236 15015 : nSamplePoints++;
237 : }
238 :
239 715 : return nBadCount == nSamplePoints;
240 : }
241 :
242 616 : static bool GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
243 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
244 : int nPixels, int /* nLines */, double dfPixelSizeX, double dfPixelSizeY)
245 : {
246 616 : double adfX[21] = {};
247 616 : double adfY[21] = {};
248 :
249 616 : const double dfMinXOut = padfExtent[0];
250 616 : const double dfMinYOut = padfExtent[1];
251 :
252 : // Take 20 steps.
253 616 : int nSamplePoints = 0;
254 13552 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
255 : {
256 : // Ensure we end exactly at the end.
257 12936 : if (dfRatio > 0.99)
258 616 : dfRatio = 1.0;
259 :
260 : // Along right.
261 12936 : adfX[nSamplePoints] = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
262 12936 : adfY[nSamplePoints] = dfMinYOut;
263 12936 : nSamplePoints++;
264 : }
265 616 : double adfZ[21] = {};
266 :
267 616 : int abSuccess[21] = {};
268 :
269 616 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
270 : abSuccess);
271 :
272 616 : int abSuccess2[21] = {};
273 :
274 616 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
275 : abSuccess2);
276 :
277 616 : nSamplePoints = 0;
278 616 : int nBadCount = 0;
279 13552 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
280 : {
281 12936 : const double expected_x = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
282 12936 : const double expected_y = dfMinYOut;
283 12936 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
284 10826 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
285 10537 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
286 : {
287 2399 : nBadCount++;
288 : }
289 12936 : nSamplePoints++;
290 : }
291 :
292 616 : return nBadCount == nSamplePoints;
293 : }
294 :
295 : /************************************************************************/
296 : /* GDALSuggestedWarpOutput2() */
297 : /************************************************************************/
298 :
299 : /**
300 : * Suggest output file size.
301 : *
302 : * This function is used to suggest the size, and georeferenced extents
303 : * appropriate given the indicated transformation and input file. It walks
304 : * the edges of the input file (approximately 20 sample points along each
305 : * edge) transforming into output coordinates in order to get an extents box.
306 : *
307 : * Then a resolution is computed with the intent that the length of the
308 : * distance from the top left corner of the output imagery to the bottom right
309 : * corner would represent the same number of pixels as in the source image.
310 : * Note that if the image is somewhat rotated the diagonal taken isn't of the
311 : * whole output bounding rectangle, but instead of the locations where the
312 : * top/left and bottom/right corners transform. The output pixel size is
313 : * always square. This is intended to approximately preserve the resolution
314 : * of the input data in the output file.
315 : *
316 : * The values returned in padfGeoTransformOut, pnPixels and pnLines are
317 : * the suggested number of pixels and lines for the output file, and the
318 : * geotransform relating those pixels to the output georeferenced coordinates.
319 : *
320 : * The trickiest part of using the function is ensuring that the
321 : * transformer created is from source file pixel/line coordinates to
322 : * output file georeferenced coordinates. This can be accomplished with
323 : * GDALCreateGenImgProjTransformer() by passing a NULL for the hDstDS.
324 : *
325 : * @param hSrcDS the input image (it is assumed the whole input image is
326 : * being transformed).
327 : * @param pfnTransformer the transformer function.
328 : * @param pTransformArg the callback data for the transformer function.
329 : * @param padfGeoTransformOut the array of six doubles in which the suggested
330 : * geotransform is returned.
331 : * @param pnPixels int in which the suggest pixel width of output is returned.
332 : * @param pnLines int in which the suggest pixel height of output is returned.
333 : * @param padfExtent Four entry array to return extents as (xmin, ymin, xmax,
334 : * ymax).
335 : * @param nOptions Options flags. Zero or GDAL_SWO_ROUND_UP_SIZE to ask *pnPixels
336 : * and *pnLines to be rounded up instead of being rounded to the closes integer, or
337 : * GDAL_SWO_FORCE_SQUARE_PIXEL to indicate that the generated pixel size is a square.
338 : *
339 : * @return CE_None if successful or CE_Failure otherwise.
340 : */
341 :
342 1337 : CPLErr CPL_STDCALL GDALSuggestedWarpOutput2(GDALDatasetH hSrcDS,
343 : GDALTransformerFunc pfnTransformer,
344 : void *pTransformArg,
345 : double *padfGeoTransformOut,
346 : int *pnPixels, int *pnLines,
347 : double *padfExtent, int nOptions)
348 : {
349 1337 : VALIDATE_POINTER1(hSrcDS, "GDALSuggestedWarpOutput2", CE_Failure);
350 :
351 : const bool bIsGDALGenImgProjTransform{
352 2674 : pTransformArg &&
353 1337 : GDALIsTransformer(pTransformArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME)};
354 :
355 : /* -------------------------------------------------------------------- */
356 : /* Setup sample points all around the edge of the input raster. */
357 : /* -------------------------------------------------------------------- */
358 1337 : if (bIsGDALGenImgProjTransform)
359 : {
360 : // In case CHECK_WITH_INVERT_PROJ has been modified.
361 1337 : GDALRefreshGenImgProjTransformer(pTransformArg);
362 : }
363 0 : else if (GDALIsTransformer(pTransformArg,
364 : GDAL_APPROX_TRANSFORMER_CLASS_NAME))
365 : {
366 : // In case CHECK_WITH_INVERT_PROJ has been modified.
367 0 : GDALRefreshApproxTransformer(pTransformArg);
368 : }
369 :
370 1337 : const int nInXSize = GDALGetRasterXSize(hSrcDS);
371 1337 : const int nInYSize = GDALGetRasterYSize(hSrcDS);
372 :
373 : /* ------------------------------------------------------------- */
374 : /* Special case for warping on the same (or null) CRS. */
375 : /* ------------------------------------------------------------- */
376 1337 : if ((!nOptions || (nOptions & GDAL_SWO_FORCE_SQUARE_PIXEL) == 0) &&
377 1336 : pTransformArg && bIsGDALGenImgProjTransform)
378 : {
379 1336 : const GDALGenImgProjTransformInfo *psInfo =
380 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
381 :
382 1336 : if (!psInfo->sSrcParams.pTransformer &&
383 1252 : !psInfo->bHasCustomTransformationPipeline &&
384 1248 : !psInfo->sDstParams.pTransformer &&
385 1248 : psInfo->sSrcParams.adfGeoTransform[2] == 0 &&
386 1246 : psInfo->sSrcParams.adfGeoTransform[4] == 0 &&
387 1246 : psInfo->sDstParams.adfGeoTransform[0] == 0 &&
388 1234 : psInfo->sDstParams.adfGeoTransform[1] == 1 &&
389 1234 : psInfo->sDstParams.adfGeoTransform[2] == 0 &&
390 1234 : psInfo->sDstParams.adfGeoTransform[3] == 0 &&
391 1234 : psInfo->sDstParams.adfGeoTransform[4] == 0 &&
392 1234 : psInfo->sDstParams.adfGeoTransform[5] == 1)
393 : {
394 1234 : const OGRSpatialReference *poSourceCRS = nullptr;
395 1234 : const OGRSpatialReference *poTargetCRS = nullptr;
396 :
397 1234 : if (psInfo->pReprojectArg)
398 : {
399 809 : const GDALReprojectionTransformInfo *psRTI =
400 : static_cast<const GDALReprojectionTransformInfo *>(
401 : psInfo->pReprojectArg);
402 809 : poSourceCRS = psRTI->poForwardTransform->GetSourceCS();
403 809 : poTargetCRS = psRTI->poForwardTransform->GetTargetCS();
404 : }
405 :
406 2043 : if ((!poSourceCRS && !poTargetCRS) ||
407 809 : (poSourceCRS && poTargetCRS &&
408 809 : poSourceCRS->IsSame(poTargetCRS)))
409 : {
410 :
411 786 : const bool bNorthUp{psInfo->sSrcParams.adfGeoTransform[5] <
412 : 0.0};
413 :
414 786 : memcpy(padfGeoTransformOut, psInfo->sSrcParams.adfGeoTransform,
415 : sizeof(double) * 6);
416 :
417 786 : if (!bNorthUp)
418 : {
419 150 : padfGeoTransformOut[3] = padfGeoTransformOut[3] +
420 150 : nInYSize * padfGeoTransformOut[5];
421 150 : padfGeoTransformOut[5] = -padfGeoTransformOut[5];
422 : }
423 :
424 786 : *pnPixels = nInXSize;
425 786 : *pnLines = nInYSize;
426 :
427 : // Calculate extent from hSrcDS
428 786 : if (padfExtent)
429 : {
430 786 : padfExtent[0] = psInfo->sSrcParams.adfGeoTransform[0];
431 786 : padfExtent[1] =
432 786 : psInfo->sSrcParams.adfGeoTransform[3] +
433 786 : nInYSize * psInfo->sSrcParams.adfGeoTransform[5];
434 786 : padfExtent[2] =
435 786 : psInfo->sSrcParams.adfGeoTransform[0] +
436 786 : nInXSize * psInfo->sSrcParams.adfGeoTransform[1];
437 786 : padfExtent[3] = psInfo->sSrcParams.adfGeoTransform[3];
438 786 : if (!bNorthUp)
439 : {
440 150 : std::swap(padfExtent[1], padfExtent[3]);
441 : }
442 : }
443 786 : return CE_None;
444 : }
445 : }
446 : }
447 :
448 551 : const int N_PIXELSTEP = 50;
449 : int nSteps = static_cast<int>(
450 551 : static_cast<double>(std::min(nInYSize, nInXSize)) / N_PIXELSTEP + 0.5);
451 551 : if (nSteps < 20)
452 520 : nSteps = 20;
453 31 : else if (nSteps > 100)
454 14 : nSteps = 100;
455 :
456 : // TODO(rouault): How is this goto retry supposed to work? Added in r20537.
457 : // Does redoing the same malloc multiple times work? If it is needed, can
458 : // it be converted to a tigher while loop around the MALLOC3s and free? Is
459 : // the point to try with the full requested steps. Then, if there is not
460 : // enough memory, back off and try with just 20 steps?
461 551 : retry:
462 551 : int nStepsPlusOne = nSteps + 1;
463 551 : int nSampleMax = nStepsPlusOne * nStepsPlusOne;
464 :
465 551 : double dfStep = 1.0 / nSteps;
466 551 : double *padfY = nullptr;
467 551 : double *padfZ = nullptr;
468 551 : double *padfYRevert = nullptr;
469 551 : double *padfZRevert = nullptr;
470 :
471 : int *pabSuccess = static_cast<int *>(
472 551 : VSI_MALLOC3_VERBOSE(sizeof(int), nStepsPlusOne, nStepsPlusOne));
473 : double *padfX = static_cast<double *>(
474 551 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
475 : double *padfXRevert = static_cast<double *>(
476 551 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
477 551 : if (pabSuccess == nullptr || padfX == nullptr || padfXRevert == nullptr)
478 : {
479 0 : CPLFree(padfX);
480 0 : CPLFree(padfXRevert);
481 0 : CPLFree(pabSuccess);
482 0 : if (nSteps > 20)
483 : {
484 0 : nSteps = 20;
485 0 : goto retry;
486 : }
487 0 : return CE_Failure;
488 : }
489 :
490 551 : padfY = padfX + nSampleMax;
491 551 : padfZ = padfX + nSampleMax * 2;
492 551 : padfYRevert = padfXRevert + nSampleMax;
493 551 : padfZRevert = padfXRevert + nSampleMax * 2;
494 :
495 : // Take N_STEPS steps.
496 13353 : for (int iStep = 0; iStep <= nSteps; iStep++)
497 : {
498 12802 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
499 12802 : int iStep2 = iStep;
500 :
501 : // Along top.
502 12802 : padfX[iStep2] = dfRatio * nInXSize;
503 12802 : padfY[iStep2] = 0.0;
504 12802 : padfZ[iStep2] = 0.0;
505 :
506 : // Along bottom.
507 12802 : iStep2 += nStepsPlusOne;
508 12802 : padfX[iStep2] = dfRatio * nInXSize;
509 12802 : padfY[iStep2] = nInYSize;
510 12802 : padfZ[iStep2] = 0.0;
511 :
512 : // Along left.
513 12802 : iStep2 += nStepsPlusOne;
514 12802 : padfX[iStep2] = 0.0;
515 12802 : padfY[iStep2] = dfRatio * nInYSize;
516 12802 : padfZ[iStep2] = 0.0;
517 :
518 : // Along right.
519 12802 : iStep2 += nStepsPlusOne;
520 12802 : padfX[iStep2] = nInXSize;
521 12802 : padfY[iStep2] = dfRatio * nInYSize;
522 12802 : padfZ[iStep2] = 0.0;
523 : }
524 :
525 551 : int nSamplePoints = 4 * nStepsPlusOne;
526 :
527 551 : memset(pabSuccess, 1, sizeof(int) * nSampleMax);
528 :
529 : /* -------------------------------------------------------------------- */
530 : /* Transform them to the output coordinate system. */
531 : /* -------------------------------------------------------------------- */
532 : {
533 1102 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
534 551 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY, padfZ,
535 : pabSuccess);
536 : }
537 551 : constexpr int SIGN_FINAL_UNINIT = -2;
538 551 : constexpr int SIGN_FINAL_INVALID = 0;
539 551 : int iSignDiscontinuity = SIGN_FINAL_UNINIT;
540 551 : int nFailedCount = 0;
541 551 : const int iSignArray[2] = {-1, 1};
542 51759 : for (int i = 0; i < nSamplePoints; i++)
543 : {
544 51208 : if (pabSuccess[i])
545 : {
546 : // Fix for https://trac.osgeo.org/gdal/ticket/7243
547 : // where echo "-2050000.000 2050000.000" |
548 : // gdaltransform -s_srs EPSG:3411 -t_srs EPSG:4326
549 : // gives "-180 63.691332898492"
550 : // but we would rather like 180
551 46204 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
552 : {
553 13672 : if (!((iSignDiscontinuity * padfX[i] > 0 &&
554 13588 : iSignDiscontinuity * padfX[i] <= 180.0) ||
555 85 : (fabs(padfX[i] - iSignDiscontinuity * -180.0) < 1e-8)))
556 : {
557 62 : iSignDiscontinuity = SIGN_FINAL_INVALID;
558 : }
559 : }
560 32532 : else if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
561 : {
562 1299 : for (const auto &iSign : iSignArray)
563 : {
564 953 : if ((iSign * padfX[i] > 0 && iSign * padfX[i] <= 180.0) ||
565 750 : (fabs(padfX[i] - iSign * -180.0) < 1e-8))
566 : {
567 203 : iSignDiscontinuity = iSign;
568 203 : break;
569 : }
570 : }
571 549 : if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
572 : {
573 346 : iSignDiscontinuity = SIGN_FINAL_INVALID;
574 : }
575 : }
576 : }
577 : else
578 : {
579 5004 : nFailedCount++;
580 : }
581 : }
582 :
583 551 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
584 : {
585 13953 : for (int i = 0; i < nSamplePoints; i++)
586 : {
587 13812 : if (pabSuccess[i])
588 : {
589 13195 : if (fabs(padfX[i] - iSignDiscontinuity * -180.0) < 1e-8)
590 : {
591 2 : double axTemp[2] = {iSignDiscontinuity * -180.0,
592 2 : iSignDiscontinuity * 180.0};
593 2 : double ayTemp[2] = {padfY[i], padfY[i]};
594 2 : double azTemp[2] = {padfZ[i], padfZ[i]};
595 2 : int abSuccess[2] = {FALSE, FALSE};
596 4 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
597 2 : if (pfnTransformer(pTransformArg, TRUE, 2, axTemp, ayTemp,
598 2 : azTemp, abSuccess) &&
599 4 : fabs(axTemp[0] - axTemp[1]) < 1e-8 &&
600 2 : fabs(ayTemp[0] - ayTemp[1]) < 1e-8)
601 : {
602 2 : padfX[i] = iSignDiscontinuity * 180.0;
603 : }
604 : }
605 : }
606 : }
607 : }
608 :
609 : /* -------------------------------------------------------------------- */
610 : /* Check if the computed target coordinates are revertable. */
611 : /* If not, try the detailed grid sampling. */
612 : /* -------------------------------------------------------------------- */
613 551 : if (nFailedCount)
614 : {
615 140 : CPLDebug("WARP", "At least one point failed after direct transform");
616 : }
617 : else
618 : {
619 411 : memcpy(padfXRevert, padfX, nSamplePoints * sizeof(double));
620 411 : memcpy(padfYRevert, padfY, nSamplePoints * sizeof(double));
621 411 : memcpy(padfZRevert, padfZ, nSamplePoints * sizeof(double));
622 : {
623 822 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
624 411 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, padfXRevert,
625 : padfYRevert, padfZRevert, pabSuccess);
626 : }
627 :
628 37527 : for (int i = 0; nFailedCount == 0 && i < nSamplePoints; i++)
629 : {
630 37136 : if (!pabSuccess[i])
631 : {
632 20 : nFailedCount++;
633 20 : break;
634 : }
635 :
636 37116 : double dfRatio = (i % nStepsPlusOne) * dfStep;
637 37116 : if (dfRatio > 0.99)
638 1554 : dfRatio = 1.0;
639 :
640 37116 : double dfExpectedX = 0.0;
641 37116 : double dfExpectedY = 0.0;
642 37116 : if (i < nStepsPlusOne)
643 : {
644 9466 : dfExpectedX = dfRatio * nInXSize;
645 : }
646 27650 : else if (i < 2 * nStepsPlusOne)
647 : {
648 9370 : dfExpectedX = dfRatio * nInXSize;
649 9370 : dfExpectedY = nInYSize;
650 : }
651 18280 : else if (i < 3 * nStepsPlusOne)
652 : {
653 9202 : dfExpectedY = dfRatio * nInYSize;
654 : }
655 : else
656 : {
657 9078 : dfExpectedX = nInXSize;
658 9078 : dfExpectedY = dfRatio * nInYSize;
659 : }
660 :
661 37116 : if (fabs(padfXRevert[i] - dfExpectedX) >
662 37116 : nInXSize / static_cast<double>(nSteps) ||
663 37104 : fabs(padfYRevert[i] - dfExpectedY) >
664 37104 : nInYSize / static_cast<double>(nSteps))
665 12 : nFailedCount++;
666 : }
667 411 : if (nFailedCount != 0)
668 32 : CPLDebug("WARP",
669 : "At least one point failed after revert transform");
670 : }
671 :
672 : /* -------------------------------------------------------------------- */
673 : /* If any of the edge points failed to transform, we need to */
674 : /* build a fairly detailed internal grid of points instead to */
675 : /* help identify the area that is transformable. */
676 : /* -------------------------------------------------------------------- */
677 551 : if (nFailedCount)
678 : {
679 172 : nSamplePoints = 0;
680 :
681 : // Take N_STEPS steps.
682 3938 : for (int iStep = 0; iStep <= nSteps; iStep++)
683 : {
684 3766 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
685 :
686 96378 : for (int iStep2 = 0; iStep2 <= nSteps; iStep2++)
687 : {
688 92612 : const double dfRatio2 =
689 92612 : iStep2 == nSteps ? 1.0 : iStep2 * dfStep;
690 :
691 : // From top to bottom, from left to right.
692 92612 : padfX[nSamplePoints] = dfRatio2 * nInXSize;
693 92612 : padfY[nSamplePoints] = dfRatio * nInYSize;
694 92612 : padfZ[nSamplePoints] = 0.0;
695 92612 : nSamplePoints++;
696 : }
697 : }
698 :
699 172 : CPLAssert(nSamplePoints == nSampleMax);
700 :
701 : {
702 344 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
703 172 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY,
704 : padfZ, pabSuccess);
705 : }
706 : }
707 :
708 : /* -------------------------------------------------------------------- */
709 : /* Collect the bounds, ignoring any failed points. */
710 : /* -------------------------------------------------------------------- */
711 551 : double dfMinXOut = 0.0;
712 551 : double dfMinYOut = 0.0;
713 551 : double dfMaxXOut = 0.0;
714 551 : double dfMaxYOut = 0.0;
715 551 : bool bGotInitialPoint = false;
716 :
717 551 : nFailedCount = 0;
718 129307 : for (int i = 0; i < nSamplePoints; i++)
719 : {
720 128756 : int x_i = 0;
721 128756 : int y_i = 0;
722 :
723 128756 : if (nSamplePoints == nSampleMax)
724 : {
725 92612 : x_i = i % nStepsPlusOne;
726 92612 : y_i = i / nStepsPlusOne;
727 : }
728 : else
729 : {
730 36144 : if (i < 2 * nStepsPlusOne)
731 : {
732 18072 : x_i = i % nStepsPlusOne;
733 18072 : y_i = (i < nStepsPlusOne) ? 0 : nSteps;
734 : }
735 : }
736 :
737 128756 : if (x_i > 0 && (pabSuccess[i - 1] || pabSuccess[i]))
738 : {
739 92661 : double x_out_before = padfX[i - 1];
740 92661 : double x_out_after = padfX[i];
741 92661 : int nIter = 0;
742 92661 : double x_in_before =
743 92661 : static_cast<double>(x_i - 1) * nInXSize / nSteps;
744 92661 : double x_in_after = static_cast<double>(x_i) * nInXSize / nSteps;
745 92661 : int invalid_before = !(pabSuccess[i - 1]);
746 92661 : int invalid_after = !(pabSuccess[i]);
747 :
748 : // Detect discontinuity in target coordinates when the target x
749 : // coordinates change sign. This may be a false positive when the
750 : // target tx is around 0 Dichotomic search to reduce the interval
751 : // to near the discontinuity and get a better out extent.
752 111266 : while ((invalid_before || invalid_after ||
753 230199 : x_out_before * x_out_after < 0.0) &&
754 : nIter < 16)
755 : {
756 26272 : double x = (x_in_before + x_in_after) / 2.0;
757 26272 : double y = static_cast<double>(y_i) * nInYSize / nSteps;
758 26272 : double z = 0.0;
759 26272 : int bSuccess = TRUE;
760 26272 : if (pfnTransformer(pTransformArg, FALSE, 1, &x, &y, &z,
761 45734 : &bSuccess) &&
762 19462 : bSuccess)
763 : {
764 19462 : if (bGotInitialPoint)
765 : {
766 19442 : dfMinXOut = std::min(dfMinXOut, x);
767 19442 : dfMinYOut = std::min(dfMinYOut, y);
768 19442 : dfMaxXOut = std::max(dfMaxXOut, x);
769 19442 : dfMaxYOut = std::max(dfMaxYOut, y);
770 : }
771 : else
772 : {
773 20 : bGotInitialPoint = true;
774 20 : dfMinXOut = x;
775 20 : dfMaxXOut = x;
776 20 : dfMinYOut = y;
777 20 : dfMaxYOut = y;
778 : }
779 :
780 19462 : if (invalid_before || x_out_before * x < 0)
781 : {
782 10301 : invalid_after = FALSE;
783 10301 : x_in_after = (x_in_before + x_in_after) / 2.0;
784 10301 : x_out_after = x;
785 : }
786 : else
787 : {
788 9161 : invalid_before = FALSE;
789 9161 : x_out_before = x;
790 9161 : x_in_before = (x_in_before + x_in_after) / 2.0;
791 : }
792 : }
793 : else
794 : {
795 6810 : if (invalid_before)
796 : {
797 3402 : x_in_before = (x_in_before + x_in_after) / 2.0;
798 : }
799 3408 : else if (invalid_after)
800 : {
801 3408 : x_in_after = (x_in_before + x_in_after) / 2.0;
802 : }
803 : else
804 : {
805 0 : break;
806 : }
807 : }
808 26272 : nIter++;
809 : }
810 : }
811 :
812 128756 : if (!pabSuccess[i])
813 : {
814 14579 : nFailedCount++;
815 14579 : continue;
816 : }
817 :
818 114177 : if (bGotInitialPoint)
819 : {
820 113648 : dfMinXOut = std::min(dfMinXOut, padfX[i]);
821 113648 : dfMinYOut = std::min(dfMinYOut, padfY[i]);
822 113648 : dfMaxXOut = std::max(dfMaxXOut, padfX[i]);
823 113648 : dfMaxYOut = std::max(dfMaxYOut, padfY[i]);
824 : }
825 : else
826 : {
827 529 : bGotInitialPoint = true;
828 529 : dfMinXOut = padfX[i];
829 529 : dfMaxXOut = padfX[i];
830 529 : dfMinYOut = padfY[i];
831 529 : dfMaxYOut = padfY[i];
832 : }
833 : }
834 :
835 551 : if (nFailedCount > nSamplePoints - 10)
836 : {
837 5 : CPLError(CE_Failure, CPLE_AppDefined,
838 : "Too many points (%d out of %d) failed to transform, "
839 : "unable to compute output bounds.",
840 : nFailedCount, nSamplePoints);
841 :
842 5 : CPLFree(padfX);
843 5 : CPLFree(padfXRevert);
844 5 : CPLFree(pabSuccess);
845 :
846 5 : return CE_Failure;
847 : }
848 :
849 546 : if (nFailedCount)
850 136 : CPLDebug("GDAL",
851 : "GDALSuggestedWarpOutput(): %d out of %d points failed to "
852 : "transform.",
853 : nFailedCount, nSamplePoints);
854 :
855 546 : bool bIsGeographicCoordsDeg = false;
856 546 : if (bIsGDALGenImgProjTransform)
857 : {
858 546 : const GDALGenImgProjTransformInfo *pGIPTI =
859 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
860 546 : if (pGIPTI->sSrcParams.pTransformer == GDALGeoLocTransform &&
861 36 : pGIPTI->sDstParams.pTransformer == nullptr &&
862 36 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
863 34 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
864 34 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
865 34 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
866 34 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
867 34 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
868 : {
869 : /* --------------------------------------------------------------------
870 : */
871 : /* Special case for geolocation array, to quickly find the
872 : * bounds. */
873 : /* --------------------------------------------------------------------
874 : */
875 34 : const GDALGeoLocTransformInfo *pGLTI =
876 : static_cast<const GDALGeoLocTransformInfo *>(
877 : pGIPTI->sSrcParams.pTransformArg);
878 :
879 34 : if (pGIPTI->pReproject == nullptr)
880 : {
881 : const char *pszGLSRS =
882 28 : CSLFetchNameValue(pGLTI->papszGeolocationInfo, "SRS");
883 28 : if (pszGLSRS == nullptr)
884 : {
885 6 : bIsGeographicCoordsDeg = true;
886 : }
887 : else
888 : {
889 44 : OGRSpatialReference oSRS;
890 22 : if (oSRS.SetFromUserInput(pszGLSRS) == OGRERR_NONE &&
891 42 : oSRS.IsGeographic() &&
892 20 : std::fabs(oSRS.GetAngularUnits() -
893 20 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9)
894 : {
895 20 : bIsGeographicCoordsDeg = true;
896 : }
897 : }
898 : }
899 :
900 272 : for (const auto &xy :
901 34 : {std::pair<double, double>(pGLTI->dfMinX, pGLTI->dfYAtMinX),
902 34 : std::pair<double, double>(pGLTI->dfXAtMinY, pGLTI->dfMinY),
903 34 : std::pair<double, double>(pGLTI->dfMaxX, pGLTI->dfYAtMaxX),
904 170 : std::pair<double, double>(pGLTI->dfXAtMaxY, pGLTI->dfMaxY)})
905 : {
906 136 : double x = xy.first;
907 136 : double y = xy.second;
908 136 : if (pGLTI->bSwapXY)
909 : {
910 4 : std::swap(x, y);
911 : }
912 136 : double xOut = std::numeric_limits<double>::quiet_NaN();
913 136 : double yOut = std::numeric_limits<double>::quiet_NaN();
914 160 : if (pGIPTI->pReproject == nullptr ||
915 24 : pGIPTI->pReproject(pGIPTI->pReprojectArg, false, 1, &x, &y,
916 : nullptr, nullptr))
917 : {
918 136 : xOut = x;
919 136 : yOut = y;
920 : }
921 136 : dfMinXOut = std::min(dfMinXOut, xOut);
922 136 : dfMinYOut = std::min(dfMinYOut, yOut);
923 136 : dfMaxXOut = std::max(dfMaxXOut, xOut);
924 136 : dfMaxYOut = std::max(dfMaxYOut, yOut);
925 34 : }
926 : }
927 512 : else if (pGIPTI->sSrcParams.pTransformer == nullptr &&
928 466 : pGIPTI->sDstParams.pTransformer == nullptr &&
929 466 : pGIPTI->pReproject == GDALReprojectionTransform &&
930 453 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
931 451 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
932 451 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
933 451 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
934 451 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
935 451 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
936 : {
937 : /* ------------------------------------------------------------- */
938 : /* Special case for warping using source geotransform and */
939 : /* reprojection to deal with the poles. */
940 : /* ------------------------------------------------------------- */
941 451 : const GDALReprojectionTransformInfo *psRTI =
942 : static_cast<const GDALReprojectionTransformInfo *>(
943 : pGIPTI->pReprojectArg);
944 : const OGRSpatialReference *poSourceCRS =
945 451 : psRTI->poForwardTransform->GetSourceCS();
946 : const OGRSpatialReference *poTargetCRS =
947 451 : psRTI->poForwardTransform->GetTargetCS();
948 901 : if (poTargetCRS != nullptr &&
949 450 : psRTI->poReverseTransform != nullptr &&
950 450 : poTargetCRS->IsGeographic() &&
951 158 : fabs(poTargetCRS->GetAngularUnits() -
952 1059 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9 &&
953 158 : (!poSourceCRS || !poSourceCRS->IsGeographic()))
954 : {
955 107 : bIsGeographicCoordsDeg = true;
956 :
957 107 : std::unique_ptr<CPLConfigOptionSetter> poSetter;
958 107 : if (pGIPTI->bCheckWithInvertPROJ)
959 : {
960 : // CHECK_WITH_INVERT_PROJ=YES prevent reliable
961 : // transformation of poles.
962 4 : poSetter = std::make_unique<CPLConfigOptionSetter>(
963 4 : "CHECK_WITH_INVERT_PROJ", "NO", false);
964 4 : GDALRefreshGenImgProjTransformer(pTransformArg);
965 : // GDALRefreshGenImgProjTransformer() has invalidated psRTI
966 4 : psRTI = static_cast<const GDALReprojectionTransformInfo *>(
967 : pGIPTI->pReprojectArg);
968 : }
969 :
970 321 : for (const auto &sign : iSignArray)
971 : {
972 214 : double X = 0.0;
973 214 : const double Yinit = 90.0 * sign;
974 214 : double Y = Yinit;
975 214 : if (psRTI->poReverseTransform->Transform(1, &X, &Y))
976 : {
977 132 : const auto invGT =
978 : pGIPTI->sSrcParams.adfInvGeoTransform;
979 132 : const double x = invGT[0] + X * invGT[1] + Y * invGT[2];
980 132 : const double y = invGT[3] + X * invGT[4] + Y * invGT[5];
981 132 : constexpr double EPSILON = 1e-5;
982 132 : if (x >= -EPSILON && x <= nInXSize + EPSILON &&
983 27 : y >= -EPSILON && y <= nInYSize + EPSILON)
984 : {
985 6 : if (psRTI->poForwardTransform->Transform(1, &X,
986 12 : &Y) &&
987 6 : fabs(Y - Yinit) <= 1e-6)
988 : {
989 6 : bool bMinXMaxXSet = false;
990 6 : if (poSourceCRS)
991 : {
992 : const char *pszProjection =
993 6 : poSourceCRS->GetAttrValue("PROJECTION");
994 6 : if (pszProjection &&
995 6 : EQUAL(pszProjection,
996 : SRS_PT_ORTHOGRAPHIC))
997 : {
998 : const double dfLon0 =
999 4 : poSourceCRS->GetNormProjParm(
1000 : SRS_PP_CENTRAL_MERIDIAN, 0.0);
1001 4 : dfMinXOut = dfLon0 - 90;
1002 4 : dfMaxXOut = dfLon0 + 90;
1003 4 : bMinXMaxXSet = true;
1004 : }
1005 : }
1006 6 : if (!bMinXMaxXSet)
1007 : {
1008 2 : dfMinXOut = -180;
1009 2 : dfMaxXOut = 180;
1010 : }
1011 6 : if (sign < 0)
1012 2 : dfMinYOut = Yinit;
1013 : else
1014 4 : dfMaxYOut = Yinit;
1015 : }
1016 : }
1017 : }
1018 : }
1019 :
1020 107 : if (poSetter)
1021 : {
1022 4 : poSetter.reset();
1023 4 : GDALRefreshGenImgProjTransformer(pTransformArg);
1024 4 : pGIPTI = static_cast<const GDALGenImgProjTransformInfo *>(
1025 : pTransformArg);
1026 4 : psRTI = static_cast<const GDALReprojectionTransformInfo *>(
1027 : pGIPTI->pReprojectArg);
1028 4 : poSourceCRS = psRTI->poForwardTransform->GetSourceCS();
1029 4 : poTargetCRS = psRTI->poForwardTransform->GetTargetCS();
1030 : }
1031 : }
1032 :
1033 : // Use TransformBounds() to handle more particular cases
1034 451 : if (poSourceCRS != nullptr && poTargetCRS != nullptr &&
1035 450 : pGIPTI->sSrcParams.adfGeoTransform[1] != 0 &&
1036 450 : pGIPTI->sSrcParams.adfGeoTransform[2] == 0 &&
1037 450 : pGIPTI->sSrcParams.adfGeoTransform[4] == 0 &&
1038 450 : pGIPTI->sSrcParams.adfGeoTransform[5] != 0)
1039 : {
1040 450 : const double dfULX = pGIPTI->sSrcParams.adfGeoTransform[0];
1041 450 : const double dfULY = pGIPTI->sSrcParams.adfGeoTransform[3];
1042 450 : const double dfLRX =
1043 450 : dfULX + pGIPTI->sSrcParams.adfGeoTransform[1] * nInXSize;
1044 450 : const double dfLRY =
1045 450 : dfULY + pGIPTI->sSrcParams.adfGeoTransform[5] * nInYSize;
1046 450 : const double dfMinSrcX = std::min(dfULX, dfLRX);
1047 450 : const double dfMinSrcY = std::min(dfULY, dfLRY);
1048 450 : const double dfMaxSrcX = std::max(dfULX, dfLRX);
1049 450 : const double dfMaxSrcY = std::max(dfULY, dfLRY);
1050 450 : double dfTmpMinXOut = std::numeric_limits<double>::max();
1051 450 : double dfTmpMinYOut = std::numeric_limits<double>::max();
1052 450 : double dfTmpMaxXOut = std::numeric_limits<double>::min();
1053 450 : double dfTmpMaxYOut = std::numeric_limits<double>::min();
1054 900 : if (psRTI->poForwardTransform->TransformBounds(
1055 : dfMinSrcX, dfMinSrcY, dfMaxSrcX, dfMaxSrcY,
1056 : &dfTmpMinXOut, &dfTmpMinYOut, &dfTmpMaxXOut,
1057 : &dfTmpMaxYOut,
1058 450 : 2)) // minimum number of points as we already have a
1059 : // logic above to sample
1060 : {
1061 443 : dfMinXOut = std::min(dfMinXOut, dfTmpMinXOut);
1062 443 : dfMinYOut = std::min(dfMinYOut, dfTmpMinYOut);
1063 443 : dfMaxXOut = std::max(dfMaxXOut, dfTmpMaxXOut);
1064 443 : dfMaxYOut = std::max(dfMaxYOut, dfTmpMaxYOut);
1065 : }
1066 : }
1067 : }
1068 : }
1069 :
1070 : /* -------------------------------------------------------------------- */
1071 : /* Compute the distance in "georeferenced" units from the top */
1072 : /* corner of the transformed input image to the bottom left */
1073 : /* corner of the transformed input. Use this distance to */
1074 : /* compute an approximate pixel size in the output */
1075 : /* georeferenced coordinates. */
1076 : /* -------------------------------------------------------------------- */
1077 546 : double dfDiagonalDist = 0.0;
1078 546 : double dfDeltaX = 0.0;
1079 546 : double dfDeltaY = 0.0;
1080 :
1081 546 : if (pabSuccess[0] && pabSuccess[nSamplePoints - 1])
1082 : {
1083 415 : dfDeltaX = padfX[nSamplePoints - 1] - padfX[0];
1084 415 : dfDeltaY = padfY[nSamplePoints - 1] - padfY[0];
1085 : // In some cases this can result in 0 values. See #5980
1086 : // Fallback to safer method in that case.
1087 : }
1088 546 : if (dfDeltaX == 0.0 || dfDeltaY == 0.0)
1089 : {
1090 139 : dfDeltaX = dfMaxXOut - dfMinXOut;
1091 139 : dfDeltaY = dfMaxYOut - dfMinYOut;
1092 : }
1093 :
1094 546 : dfDiagonalDist = sqrt(dfDeltaX * dfDeltaX + dfDeltaY * dfDeltaY);
1095 :
1096 : /* -------------------------------------------------------------------- */
1097 : /* Compute a pixel size from this. */
1098 : /* -------------------------------------------------------------------- */
1099 : double dfPixelSize =
1100 546 : dfDiagonalDist / sqrt(static_cast<double>(nInXSize) * nInXSize +
1101 546 : static_cast<double>(nInYSize) * nInYSize);
1102 :
1103 546 : double dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1104 546 : double dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1105 :
1106 546 : const int knIntMaxMinusOne = std::numeric_limits<int>::max() - 1;
1107 546 : if (dfPixels > knIntMaxMinusOne && dfLines <= dfPixels)
1108 : {
1109 0 : dfPixels = knIntMaxMinusOne;
1110 0 : dfPixelSize = (dfMaxXOut - dfMinXOut) / dfPixels;
1111 0 : dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1112 : }
1113 546 : else if (dfLines > knIntMaxMinusOne)
1114 : {
1115 2 : dfLines = knIntMaxMinusOne;
1116 2 : dfPixelSize = (dfMaxYOut - dfMinYOut) / dfLines;
1117 2 : dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1118 : }
1119 :
1120 546 : if (dfPixels > knIntMaxMinusOne || dfLines > knIntMaxMinusOne)
1121 : {
1122 0 : CPLError(CE_Failure, CPLE_AppDefined,
1123 : "Computed dimensions are too big : %.0f x %.0f",
1124 : dfPixels + 0.5, dfLines + 0.5);
1125 :
1126 0 : CPLFree(padfX);
1127 0 : CPLFree(padfXRevert);
1128 0 : CPLFree(pabSuccess);
1129 :
1130 0 : return CE_Failure;
1131 : }
1132 :
1133 546 : if ((nOptions & GDAL_SWO_ROUND_UP_SIZE) != 0)
1134 : {
1135 8 : constexpr double EPS = 1e-5;
1136 8 : *pnPixels = static_cast<int>(std::ceil(dfPixels - EPS));
1137 8 : *pnLines = static_cast<int>(std::ceil(dfLines - EPS));
1138 : }
1139 : else
1140 : {
1141 538 : *pnPixels = static_cast<int>(dfPixels + 0.5);
1142 538 : *pnLines = static_cast<int>(dfLines + 0.5);
1143 : }
1144 :
1145 546 : double dfPixelSizeX = dfPixelSize;
1146 546 : double dfPixelSizeY = dfPixelSize;
1147 :
1148 546 : const double adfRatioArray[] = {0.000, 0.001, 0.010, 0.100, 1.000};
1149 :
1150 : /* -------------------------------------------------------------------- */
1151 : /* Check that the right border is not completely out of source */
1152 : /* image. If so, adjust the x pixel size a bit in the hope it will */
1153 : /* fit. */
1154 : /* -------------------------------------------------------------------- */
1155 723 : for (const auto &dfRatio : adfRatioArray)
1156 : {
1157 715 : const double dfTryPixelSizeX =
1158 715 : dfPixelSizeX - dfPixelSizeX * dfRatio / *pnPixels;
1159 715 : double adfExtent[4] = {dfMinXOut, dfMaxYOut - (*pnLines) * dfPixelSizeY,
1160 715 : dfMinXOut + (*pnPixels) * dfTryPixelSizeX,
1161 715 : dfMaxYOut};
1162 715 : if (!GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
1163 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1164 : dfTryPixelSizeX, dfPixelSizeY))
1165 : {
1166 538 : dfPixelSizeX = dfTryPixelSizeX;
1167 538 : break;
1168 : }
1169 : }
1170 :
1171 : /* -------------------------------------------------------------------- */
1172 : /* Check that the bottom border is not completely out of source */
1173 : /* image. If so, adjust the y pixel size a bit in the hope it will */
1174 : /* fit. */
1175 : /* -------------------------------------------------------------------- */
1176 626 : for (const auto &dfRatio : adfRatioArray)
1177 : {
1178 616 : const double dfTryPixelSizeY =
1179 616 : dfPixelSizeY - dfPixelSizeY * dfRatio / *pnLines;
1180 : double adfExtent[4] = {
1181 616 : dfMinXOut, dfMaxYOut - (*pnLines) * dfTryPixelSizeY,
1182 616 : dfMinXOut + (*pnPixels) * dfPixelSizeX, dfMaxYOut};
1183 616 : if (!GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
1184 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1185 : dfPixelSizeX, dfTryPixelSizeY))
1186 : {
1187 536 : dfPixelSizeY = dfTryPixelSizeY;
1188 536 : break;
1189 : }
1190 : }
1191 :
1192 : /* -------------------------------------------------------------------- */
1193 : /* Recompute some bounds so that all return values are consistent */
1194 : /* -------------------------------------------------------------------- */
1195 546 : double dfMaxXOutNew = dfMinXOut + (*pnPixels) * dfPixelSizeX;
1196 546 : if (bIsGeographicCoordsDeg &&
1197 133 : ((dfMaxXOut <= 180 && dfMaxXOutNew > 180) || dfMaxXOut == 180))
1198 : {
1199 3 : dfMaxXOut = 180;
1200 3 : dfPixelSizeX = (dfMaxXOut - dfMinXOut) / *pnPixels;
1201 : }
1202 : else
1203 : {
1204 543 : dfMaxXOut = dfMaxXOutNew;
1205 : }
1206 :
1207 546 : double dfMinYOutNew = dfMaxYOut - (*pnLines) * dfPixelSizeY;
1208 546 : if (bIsGeographicCoordsDeg && dfMinYOut >= -90 && dfMinYOutNew < -90)
1209 : {
1210 0 : dfMinYOut = -90;
1211 0 : dfPixelSizeY = (dfMaxYOut - dfMinYOut) / *pnLines;
1212 : }
1213 : else
1214 : {
1215 546 : dfMinYOut = dfMinYOutNew;
1216 : }
1217 :
1218 : /* -------------------------------------------------------------------- */
1219 : /* Return raw extents. */
1220 : /* -------------------------------------------------------------------- */
1221 546 : padfExtent[0] = dfMinXOut;
1222 546 : padfExtent[1] = dfMinYOut;
1223 546 : padfExtent[2] = dfMaxXOut;
1224 546 : padfExtent[3] = dfMaxYOut;
1225 :
1226 : /* -------------------------------------------------------------------- */
1227 : /* Set the output geotransform. */
1228 : /* -------------------------------------------------------------------- */
1229 546 : padfGeoTransformOut[0] = dfMinXOut;
1230 546 : padfGeoTransformOut[1] = dfPixelSizeX;
1231 546 : padfGeoTransformOut[2] = 0.0;
1232 546 : padfGeoTransformOut[3] = dfMaxYOut;
1233 546 : padfGeoTransformOut[4] = 0.0;
1234 546 : padfGeoTransformOut[5] = -dfPixelSizeY;
1235 :
1236 546 : CPLFree(padfX);
1237 546 : CPLFree(padfXRevert);
1238 546 : CPLFree(pabSuccess);
1239 :
1240 546 : return CE_None;
1241 : }
1242 :
1243 : /************************************************************************/
1244 : /* GetCurrentCheckWithInvertPROJ() */
1245 : /************************************************************************/
1246 :
1247 3954 : static bool GetCurrentCheckWithInvertPROJ()
1248 : {
1249 3954 : return CPLTestBool(CPLGetConfigOption("CHECK_WITH_INVERT_PROJ", "NO"));
1250 : }
1251 :
1252 : /************************************************************************/
1253 : /* GDALCreateGenImgProjTransformerInternal() */
1254 : /************************************************************************/
1255 :
1256 : static void *GDALCreateSimilarGenImgProjTransformer(void *hTransformArg,
1257 : double dfRatioX,
1258 : double dfRatioY);
1259 :
1260 2560 : static GDALGenImgProjTransformInfo *GDALCreateGenImgProjTransformerInternal()
1261 : {
1262 : /* -------------------------------------------------------------------- */
1263 : /* Initialize the transform info. */
1264 : /* -------------------------------------------------------------------- */
1265 : GDALGenImgProjTransformInfo *psInfo =
1266 : static_cast<GDALGenImgProjTransformInfo *>(
1267 2560 : CPLCalloc(sizeof(GDALGenImgProjTransformInfo), 1));
1268 :
1269 2560 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
1270 : strlen(GDAL_GTI2_SIGNATURE));
1271 2560 : psInfo->sTI.pszClassName = GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME;
1272 2560 : psInfo->sTI.pfnTransform = GDALGenImgProjTransform;
1273 2560 : psInfo->sTI.pfnCleanup = GDALDestroyGenImgProjTransformer;
1274 2560 : psInfo->sTI.pfnSerialize = GDALSerializeGenImgProjTransformer;
1275 2560 : psInfo->sTI.pfnCreateSimilar = GDALCreateSimilarGenImgProjTransformer;
1276 :
1277 2560 : psInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1278 2560 : psInfo->bHasCustomTransformationPipeline = false;
1279 :
1280 2560 : return psInfo;
1281 : }
1282 :
1283 : /************************************************************************/
1284 : /* GDALCreateSimilarGenImgProjTransformer() */
1285 : /************************************************************************/
1286 :
1287 57 : static void *GDALCreateSimilarGenImgProjTransformer(void *hTransformArg,
1288 : double dfRatioX,
1289 : double dfRatioY)
1290 : {
1291 57 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarGenImgProjTransformer",
1292 : nullptr);
1293 :
1294 57 : GDALGenImgProjTransformInfo *psInfo =
1295 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
1296 :
1297 : GDALGenImgProjTransformInfo *psClonedInfo =
1298 57 : GDALCreateGenImgProjTransformerInternal();
1299 :
1300 57 : memcpy(psClonedInfo, psInfo, sizeof(GDALGenImgProjTransformInfo));
1301 :
1302 57 : psClonedInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1303 :
1304 57 : if (psClonedInfo->sSrcParams.pTransformArg)
1305 8 : psClonedInfo->sSrcParams.pTransformArg = GDALCreateSimilarTransformer(
1306 : psInfo->sSrcParams.pTransformArg, dfRatioX, dfRatioY);
1307 49 : else if (dfRatioX != 1.0 || dfRatioY != 1.0)
1308 : {
1309 10 : if (psClonedInfo->sSrcParams.adfGeoTransform[2] == 0.0 &&
1310 10 : psClonedInfo->sSrcParams.adfGeoTransform[4] == 0.0)
1311 : {
1312 10 : psClonedInfo->sSrcParams.adfGeoTransform[1] *= dfRatioX;
1313 10 : psClonedInfo->sSrcParams.adfGeoTransform[5] *= dfRatioY;
1314 : }
1315 : else
1316 : {
1317 : // If the x and y ratios are not equal, then we cannot really
1318 : // compute a geotransform.
1319 0 : psClonedInfo->sSrcParams.adfGeoTransform[1] *= dfRatioX;
1320 0 : psClonedInfo->sSrcParams.adfGeoTransform[2] *= dfRatioX;
1321 0 : psClonedInfo->sSrcParams.adfGeoTransform[4] *= dfRatioX;
1322 0 : psClonedInfo->sSrcParams.adfGeoTransform[5] *= dfRatioX;
1323 : }
1324 10 : if (!GDALInvGeoTransform(psClonedInfo->sSrcParams.adfGeoTransform,
1325 10 : psClonedInfo->sSrcParams.adfInvGeoTransform))
1326 : {
1327 0 : CPLError(CE_Failure, CPLE_AppDefined, "Cannot invert geotransform");
1328 0 : GDALDestroyGenImgProjTransformer(psClonedInfo);
1329 0 : return nullptr;
1330 : }
1331 : }
1332 :
1333 57 : if (psClonedInfo->pReprojectArg)
1334 35 : psClonedInfo->pReprojectArg =
1335 35 : GDALCloneTransformer(psInfo->pReprojectArg);
1336 :
1337 57 : if (psClonedInfo->sDstParams.pTransformArg)
1338 0 : psClonedInfo->sDstParams.pTransformArg =
1339 0 : GDALCloneTransformer(psInfo->sDstParams.pTransformArg);
1340 :
1341 57 : return psClonedInfo;
1342 : }
1343 :
1344 : /************************************************************************/
1345 : /* GDALCreateGenImgProjTransformer() */
1346 : /************************************************************************/
1347 :
1348 : /**
1349 : * Create image to image transformer.
1350 : *
1351 : * This function creates a transformation object that maps from pixel/line
1352 : * coordinates on one image to pixel/line coordinates on another image. The
1353 : * images may potentially be georeferenced in different coordinate systems,
1354 : * and may used GCPs to map between their pixel/line coordinates and
1355 : * georeferenced coordinates (as opposed to the default assumption that their
1356 : * geotransform should be used).
1357 : *
1358 : * This transformer potentially performs three concatenated transformations.
1359 : *
1360 : * The first stage is from source image pixel/line coordinates to source
1361 : * image georeferenced coordinates, and may be done using the geotransform,
1362 : * or if not defined using a polynomial model derived from GCPs. If GCPs
1363 : * are used this stage is accomplished using GDALGCPTransform().
1364 : *
1365 : * The second stage is to change projections from the source coordinate system
1366 : * to the destination coordinate system, assuming they differ. This is
1367 : * accomplished internally using GDALReprojectionTransform().
1368 : *
1369 : * The third stage is converting from destination image georeferenced
1370 : * coordinates to destination image coordinates. This is done using the
1371 : * destination image geotransform, or if not available, using a polynomial
1372 : * model derived from GCPs. If GCPs are used this stage is accomplished using
1373 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
1374 : * transformation is created.
1375 : *
1376 : * @param hSrcDS source dataset, or NULL.
1377 : * @param pszSrcWKT the coordinate system for the source dataset. If NULL,
1378 : * it will be read from the dataset itself.
1379 : * @param hDstDS destination dataset (or NULL).
1380 : * @param pszDstWKT the coordinate system for the destination dataset. If
1381 : * NULL, and hDstDS not NULL, it will be read from the destination dataset.
1382 : * @param bGCPUseOK TRUE if GCPs should be used if the geotransform is not
1383 : * available on the source dataset (not destination).
1384 : * @param dfGCPErrorThreshold ignored/deprecated.
1385 : * @param nOrder the maximum order to use for GCP derived polynomials if
1386 : * possible. Use 0 to autoselect, or -1 for thin plate splines.
1387 : *
1388 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
1389 : * deallocated with GDALDestroyGenImgProjTransformer().
1390 : */
1391 :
1392 52 : void *GDALCreateGenImgProjTransformer(GDALDatasetH hSrcDS,
1393 : const char *pszSrcWKT,
1394 : GDALDatasetH hDstDS,
1395 : const char *pszDstWKT, int bGCPUseOK,
1396 : CPL_UNUSED double dfGCPErrorThreshold,
1397 : int nOrder)
1398 : {
1399 52 : char **papszOptions = nullptr;
1400 :
1401 52 : if (pszSrcWKT != nullptr)
1402 3 : papszOptions = CSLSetNameValue(papszOptions, "SRC_SRS", pszSrcWKT);
1403 52 : if (pszDstWKT != nullptr)
1404 3 : papszOptions = CSLSetNameValue(papszOptions, "DST_SRS", pszDstWKT);
1405 52 : if (!bGCPUseOK)
1406 0 : papszOptions = CSLSetNameValue(papszOptions, "GCPS_OK", "FALSE");
1407 52 : if (nOrder != 0)
1408 0 : papszOptions = CSLSetNameValue(papszOptions, "MAX_GCP_ORDER",
1409 0 : CPLString().Printf("%d", nOrder));
1410 :
1411 52 : void *pRet = GDALCreateGenImgProjTransformer2(hSrcDS, hDstDS, papszOptions);
1412 52 : CSLDestroy(papszOptions);
1413 :
1414 52 : return pRet;
1415 : }
1416 :
1417 : /************************************************************************/
1418 : /* InsertCenterLong() */
1419 : /* */
1420 : /* Insert a CENTER_LONG Extension entry on a GEOGCS to indicate */
1421 : /* the center longitude of the dataset for wrapping purposes. */
1422 : /************************************************************************/
1423 :
1424 1108 : static void InsertCenterLong(GDALDatasetH hDS, const OGRSpatialReference *poSRS,
1425 : const OGRSpatialReference *poDstSRS,
1426 : const char *pszTargetExtent,
1427 : CPLStringList &aosOptions)
1428 :
1429 : {
1430 1934 : if (!poSRS->IsGeographic() || std::fabs(poSRS->GetAngularUnits() -
1431 826 : CPLAtof(SRS_UA_DEGREE_CONV)) > 1e-9)
1432 : {
1433 285 : return;
1434 : }
1435 :
1436 825 : if (poSRS->GetExtension(nullptr, "CENTER_LONG"))
1437 0 : return;
1438 :
1439 : /* -------------------------------------------------------------------- */
1440 : /* For now we only do this if we have a geotransform since */
1441 : /* other forms require a bunch of extra work. */
1442 : /* -------------------------------------------------------------------- */
1443 825 : double adfGeoTransform[6] = {};
1444 :
1445 825 : if (GDALGetGeoTransform(hDS, adfGeoTransform) != CE_None)
1446 0 : return;
1447 :
1448 : /* -------------------------------------------------------------------- */
1449 : /* Compute min/max longitude based on testing the four corners. */
1450 : /* -------------------------------------------------------------------- */
1451 825 : const int nXSize = GDALGetRasterXSize(hDS);
1452 825 : const int nYSize = GDALGetRasterYSize(hDS);
1453 :
1454 : const double dfMinLong =
1455 1650 : std::min(std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1456 825 : 0 * adfGeoTransform[2],
1457 1650 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1458 825 : 0 * adfGeoTransform[2]),
1459 1650 : std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1460 825 : nYSize * adfGeoTransform[2],
1461 1650 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1462 825 : nYSize * adfGeoTransform[2]));
1463 : const double dfMaxLong =
1464 1650 : std::max(std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1465 825 : 0 * adfGeoTransform[2],
1466 1650 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1467 825 : 0 * adfGeoTransform[2]),
1468 1650 : std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1469 825 : nYSize * adfGeoTransform[2],
1470 1650 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1471 825 : nYSize * adfGeoTransform[2]));
1472 :
1473 : // If the raster covers more than 360 degree, give up,
1474 : // except is the target SRS is geographic and crossing the antimeridian
1475 825 : if (dfMaxLong - dfMinLong > 360.0)
1476 : {
1477 3 : const CPLStringList aosTE(CSLTokenizeString2(pszTargetExtent, ",", 0));
1478 6 : if (aosTE.size() == 4 && poDstSRS->IsGeographic() &&
1479 1 : std::fabs(poDstSRS->GetAngularUnits() -
1480 7 : CPLAtof(SRS_UA_DEGREE_CONV)) <= 1e-9 &&
1481 1 : ((CPLAtof(aosTE[0]) >= -179 && CPLAtof(aosTE[0]) < 180 &&
1482 1 : CPLAtof(aosTE[2]) > 180) ||
1483 0 : (CPLAtof(aosTE[0]) < -180 && CPLAtof(aosTE[2]) > -180 &&
1484 0 : CPLAtof(aosTE[2]) <= 179)))
1485 : {
1486 : // insert CENTER_LONG
1487 : }
1488 : else
1489 : {
1490 2 : return;
1491 : }
1492 : }
1493 :
1494 : /* -------------------------------------------------------------------- */
1495 : /* Insert center long. */
1496 : /* -------------------------------------------------------------------- */
1497 823 : const double dfCenterLong = (dfMaxLong + dfMinLong) / 2.0;
1498 823 : aosOptions.SetNameValue("CENTER_LONG", CPLSPrintf("%g", dfCenterLong));
1499 : }
1500 :
1501 : /************************************************************************/
1502 : /* GDALComputeAreaOfInterest() */
1503 : /************************************************************************/
1504 :
1505 1547 : bool GDALComputeAreaOfInterest(const OGRSpatialReference *poSRS,
1506 : double adfGT[6], int nXSize, int nYSize,
1507 : double &dfWestLongitudeDeg,
1508 : double &dfSouthLatitudeDeg,
1509 : double &dfEastLongitudeDeg,
1510 : double &dfNorthLatitudeDeg)
1511 : {
1512 1547 : bool ret = false;
1513 :
1514 1547 : if (!poSRS)
1515 0 : return false;
1516 :
1517 1547 : OGRSpatialReference oSrcSRSHoriz(*poSRS);
1518 1547 : if (oSrcSRSHoriz.IsCompound())
1519 : {
1520 19 : oSrcSRSHoriz.StripVertical();
1521 : }
1522 :
1523 1547 : OGRSpatialReference *poGeog = oSrcSRSHoriz.CloneGeogCS();
1524 1547 : if (poGeog)
1525 : {
1526 1547 : poGeog->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
1527 1547 : poGeog->SetAngularUnits(SRS_UA_DEGREE, CPLAtof(SRS_UA_DEGREE_CONV));
1528 :
1529 1547 : auto poCT = OGRCreateCoordinateTransformation(&oSrcSRSHoriz, poGeog);
1530 1547 : if (poCT)
1531 : {
1532 1547 : poCT->SetEmitErrors(false);
1533 :
1534 : double x[4], y[4];
1535 1547 : x[0] = adfGT[0];
1536 1547 : y[0] = adfGT[3];
1537 1547 : x[1] = adfGT[0] + nXSize * adfGT[1];
1538 1547 : y[1] = adfGT[3];
1539 1547 : x[2] = adfGT[0];
1540 1547 : y[2] = adfGT[3] + nYSize * adfGT[5];
1541 1547 : x[3] = x[1];
1542 1547 : y[3] = y[2];
1543 1547 : int validity[4] = {false, false, false, false};
1544 1547 : poCT->Transform(4, x, y, nullptr, validity);
1545 1547 : dfWestLongitudeDeg = std::numeric_limits<double>::max();
1546 1547 : dfSouthLatitudeDeg = std::numeric_limits<double>::max();
1547 1547 : dfEastLongitudeDeg = -std::numeric_limits<double>::max();
1548 1547 : dfNorthLatitudeDeg = -std::numeric_limits<double>::max();
1549 7735 : for (int i = 0; i < 4; i++)
1550 : {
1551 6188 : if (validity[i])
1552 : {
1553 6172 : ret = true;
1554 6172 : dfWestLongitudeDeg = std::min(dfWestLongitudeDeg, x[i]);
1555 6172 : dfSouthLatitudeDeg = std::min(dfSouthLatitudeDeg, y[i]);
1556 6172 : dfEastLongitudeDeg = std::max(dfEastLongitudeDeg, x[i]);
1557 6172 : dfNorthLatitudeDeg = std::max(dfNorthLatitudeDeg, y[i]);
1558 : }
1559 : }
1560 1547 : if (validity[0] && validity[1] && x[0] > x[1])
1561 : {
1562 13 : dfWestLongitudeDeg = x[0];
1563 13 : dfEastLongitudeDeg = x[1];
1564 : }
1565 1547 : if (ret && std::fabs(dfWestLongitudeDeg) <= 180 &&
1566 1540 : std::fabs(dfEastLongitudeDeg) <= 180 &&
1567 1536 : std::fabs(dfSouthLatitudeDeg) <= 90 &&
1568 1532 : std::fabs(dfNorthLatitudeDeg) <= 90)
1569 : {
1570 1532 : CPLDebug("GDAL", "Computing area of interest: %g, %g, %g, %g",
1571 : dfWestLongitudeDeg, dfSouthLatitudeDeg,
1572 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
1573 : }
1574 : else
1575 : {
1576 15 : CPLDebug("GDAL", "Could not compute area of interest");
1577 15 : dfWestLongitudeDeg = 0;
1578 15 : dfSouthLatitudeDeg = 0;
1579 15 : dfEastLongitudeDeg = 0;
1580 15 : dfNorthLatitudeDeg = 0;
1581 : }
1582 1547 : OGRCoordinateTransformation::DestroyCT(poCT);
1583 : }
1584 :
1585 1547 : delete poGeog;
1586 : }
1587 :
1588 1547 : return ret;
1589 : }
1590 :
1591 5 : bool GDALComputeAreaOfInterest(const OGRSpatialReference *poSRS, double dfX1,
1592 : double dfY1, double dfX2, double dfY2,
1593 : double &dfWestLongitudeDeg,
1594 : double &dfSouthLatitudeDeg,
1595 : double &dfEastLongitudeDeg,
1596 : double &dfNorthLatitudeDeg)
1597 : {
1598 5 : bool ret = false;
1599 :
1600 5 : if (!poSRS)
1601 0 : return false;
1602 :
1603 5 : OGRSpatialReference oSrcSRSHoriz(*poSRS);
1604 5 : if (oSrcSRSHoriz.IsCompound())
1605 : {
1606 0 : oSrcSRSHoriz.StripVertical();
1607 : }
1608 :
1609 5 : OGRSpatialReference *poGeog = oSrcSRSHoriz.CloneGeogCS();
1610 5 : if (poGeog)
1611 : {
1612 5 : poGeog->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
1613 :
1614 5 : auto poCT = OGRCreateCoordinateTransformation(&oSrcSRSHoriz, poGeog);
1615 5 : if (poCT)
1616 : {
1617 : double x[4], y[4];
1618 5 : x[0] = dfX1;
1619 5 : y[0] = dfY1;
1620 5 : x[1] = dfX2;
1621 5 : y[1] = dfY1;
1622 5 : x[2] = dfX1;
1623 5 : y[2] = dfY2;
1624 5 : x[3] = dfX2;
1625 5 : y[3] = dfY2;
1626 5 : int validity[4] = {false, false, false, false};
1627 5 : poCT->Transform(4, x, y, nullptr, validity);
1628 5 : dfWestLongitudeDeg = std::numeric_limits<double>::max();
1629 5 : dfSouthLatitudeDeg = std::numeric_limits<double>::max();
1630 5 : dfEastLongitudeDeg = -std::numeric_limits<double>::max();
1631 5 : dfNorthLatitudeDeg = -std::numeric_limits<double>::max();
1632 25 : for (int i = 0; i < 4; i++)
1633 : {
1634 20 : if (validity[i])
1635 : {
1636 20 : ret = true;
1637 20 : dfWestLongitudeDeg = std::min(dfWestLongitudeDeg, x[i]);
1638 20 : dfSouthLatitudeDeg = std::min(dfSouthLatitudeDeg, y[i]);
1639 20 : dfEastLongitudeDeg = std::max(dfEastLongitudeDeg, x[i]);
1640 20 : dfNorthLatitudeDeg = std::max(dfNorthLatitudeDeg, y[i]);
1641 : }
1642 : }
1643 5 : if (validity[0] && validity[1] && (dfX1 - dfX2) * (x[0] - x[1]) < 0)
1644 : {
1645 0 : dfWestLongitudeDeg = x[0];
1646 0 : dfEastLongitudeDeg = x[1];
1647 : }
1648 5 : if (ret)
1649 : {
1650 5 : CPLDebug("GDAL", "Computing area of interest: %g, %g, %g, %g",
1651 : dfWestLongitudeDeg, dfSouthLatitudeDeg,
1652 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
1653 : }
1654 : else
1655 : {
1656 0 : CPLDebug("GDAL", "Could not compute area of interest");
1657 0 : dfWestLongitudeDeg = 0;
1658 0 : dfSouthLatitudeDeg = 0;
1659 0 : dfEastLongitudeDeg = 0;
1660 0 : dfNorthLatitudeDeg = 0;
1661 : }
1662 5 : delete poCT;
1663 : }
1664 :
1665 5 : delete poGeog;
1666 : }
1667 :
1668 5 : return ret;
1669 : }
1670 :
1671 : /************************************************************************/
1672 : /* GDALGCPAntimeridianUnwrap() */
1673 : /************************************************************************/
1674 :
1675 : /* Deal with discontinuties of dfGCPX longitudes around the anti-meridian.
1676 : * Cf https://github.com/OSGeo/gdal/issues/8371
1677 : */
1678 44 : static void GDALGCPAntimeridianUnwrap(int nGCPCount, GDAL_GCP *pasGCPList,
1679 : const OGRSpatialReference &oSRS,
1680 : CSLConstList papszOptions)
1681 : {
1682 : const char *pszGCPAntimeridianUnwrap =
1683 44 : CSLFetchNameValueDef(papszOptions, "GCP_ANTIMERIDIAN_UNWRAP", "AUTO");
1684 131 : const bool bForced = EQUAL(pszGCPAntimeridianUnwrap, "YES") ||
1685 43 : EQUAL(pszGCPAntimeridianUnwrap, "ON") ||
1686 130 : EQUAL(pszGCPAntimeridianUnwrap, "TRUE") ||
1687 43 : EQUAL(pszGCPAntimeridianUnwrap, "1");
1688 49 : if (bForced || (!oSRS.IsEmpty() && oSRS.IsGeographic() &&
1689 5 : fabs(oSRS.GetAngularUnits(nullptr) -
1690 5 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-8 &&
1691 5 : EQUAL(pszGCPAntimeridianUnwrap, "AUTO")))
1692 : {
1693 5 : if (!bForced)
1694 : {
1695 : // Proceed to unwrapping only if the longitudes are within
1696 : // [-180, -170] or [170, 180]
1697 424 : for (int i = 0; i < nGCPCount; ++i)
1698 : {
1699 422 : const double dfLongAbs = fabs(pasGCPList[i].dfGCPX);
1700 422 : if (dfLongAbs > 180 || dfLongAbs < 170)
1701 : {
1702 2 : return;
1703 : }
1704 : }
1705 : }
1706 :
1707 3 : bool bDone = false;
1708 633 : for (int i = 0; i < nGCPCount; ++i)
1709 : {
1710 630 : if (pasGCPList[i].dfGCPX < 0)
1711 : {
1712 48 : if (!bDone)
1713 : {
1714 3 : bDone = true;
1715 3 : CPLDebug("WARP", "GCP longitude unwrapping");
1716 : }
1717 48 : pasGCPList[i].dfGCPX += 360;
1718 : }
1719 : }
1720 : }
1721 : }
1722 :
1723 : /************************************************************************/
1724 : /* GDALGetGenImgProjTranformerOptionList() */
1725 : /************************************************************************/
1726 :
1727 : /** Return a XML string describing options accepted by
1728 : * GDALCreateGenImgProjTransformer2().
1729 : *
1730 : * @since 3.11
1731 : */
1732 2341 : const char *GDALGetGenImgProjTranformerOptionList(void)
1733 : {
1734 : return "<OptionList>"
1735 : "<Option name='SRC_SRS' type='string' description='WKT SRS, or any "
1736 : "string recognized by OGRSpatialReference::SetFromUserInput(), to "
1737 : "be used as an override for CRS of input dataset'/>"
1738 : "<Option name='DST_SRS' type='string' description='WKT SRS, or any "
1739 : "string recognized by OGRSpatialReference::SetFromUserInput(), to "
1740 : "be used as an override for CRS of output dataset'/>"
1741 : "<Option name='PROMOTE_TO_3D' type='boolean' description='"
1742 : "Whether to promote SRC_SRS / DST_SRS to 3D.' "
1743 : "default='NO'/>"
1744 : "<Option name='COORDINATE_OPERATION' type='string' description='"
1745 : "Coordinate operation, as a PROJ or WKT string, used as an override "
1746 : "over the normally computed pipeline. The pipeline must take into "
1747 : "account the axis order of the source and target SRS.'/>"
1748 : "<Option name='ALLOW_BALLPARK' type='boolean' description='"
1749 : "Whether ballpark coordinate operations are allowed.' "
1750 : "default='YES'/>"
1751 : "<Option name='ONLY_BEST' type='string-select' "
1752 : "description='"
1753 : "By default (at least in the PROJ 9.x series), PROJ may use "
1754 : "coordinate operations that are not the \"best\" if resources "
1755 : "(typically grids) needed to use them are missing. It will then "
1756 : "fallback to other coordinate operations that have a lesser "
1757 : "accuracy, for example using Helmert transformations, or in the "
1758 : "absence of such operations, to ones with potential very rough "
1759 : " accuracy, using \"ballpark\" transformations (see "
1760 : "https://proj.org/glossary.html). "
1761 : "When calling this method with YES, PROJ will only consider the "
1762 : "\"best\" operation, and error out (at Transform() time) if they "
1763 : "cannot be used. This method may be used together with "
1764 : "ALLOW_BALLPARK=NO to only allow best operations that have a known "
1765 : "accuracy. Note that this method has no effect on PROJ versions "
1766 : "before 9.2. The default value for this option can be also set with "
1767 : "the PROJ_ONLY_BEST_DEFAULT environment variable, or with the "
1768 : "\"only_best_default\" setting of proj.ini. Setting "
1769 : "ONLY_BEST=YES/NO overrides such default value' default='AUTO'>"
1770 : " <Value>AUTO</Value>"
1771 : " <Value>YES</Value>"
1772 : " <Value>NO</Value>"
1773 : "</Option>"
1774 : "<Option name='COORDINATE_EPOCH' type='float' description='"
1775 : "Coordinate epoch, expressed as a decimal year. Useful for "
1776 : "time-dependent coordinate operations.'/>"
1777 : "<Option name='SRC_COORDINATE_EPOCH' type='float' description='"
1778 : "Coordinate epoch of source CRS, expressed as a decimal year. "
1779 : "Useful for time-dependent coordinate operations.'/>"
1780 : "<Option name='DST_COORDINATE_EPOCH' type='float' description='"
1781 : "Coordinate epoch of target CRS, expressed as a decimal year. "
1782 : "Useful for time-dependent coordinate operations.'/>"
1783 : "<Option name='GCPS_OK' type='boolean' description='"
1784 : "Allow use of GCPs.' default='YES'/>"
1785 : "<Option name='REFINE_MINIMUM_GCPS' type='int' description='"
1786 : "The minimum amount of GCPs that should be available after the "
1787 : "refinement'/>"
1788 : "<Option name='REFINE_TOLERANCE' type='float' description='"
1789 : "The tolerance that specifies when a GCP will be eliminated.'/>"
1790 : "<Option name='MAX_GCP_ORDER' type='int' description='"
1791 : "The maximum order to use for GCP derived polynomials if possible. "
1792 : "The default is to autoselect based on the number of GCPs. A value "
1793 : "of -1 triggers use of Thin Plate Spline instead of polynomials.'/>"
1794 : "<Option name='GCP_ANTIMERIDIAN_UNWRAP' type='string-select' "
1795 : "description='"
1796 : "Whether to \"unwrap\" longitudes of ground control points that "
1797 : "span the antimeridian. For datasets with GCPs in "
1798 : "longitude/latitude coordinate space spanning the antimeridian, "
1799 : "longitudes will have a discontinuity on +/- 180 deg, and will "
1800 : "result in a subset of the GCPs with longitude in the [-180,-170] "
1801 : "range and another subset in [170, 180]. By default (AUTO), that "
1802 : "situation will be detected and longitudes in [-180,-170] will be "
1803 : "shifted to [180, 190] to get a continuous set. This option can be "
1804 : "set to YES to force that behavior (useful if no SRS information is "
1805 : "available), or to NO to disable it.' default='AUTO'>"
1806 : " <Value>AUTO</Value>"
1807 : " <Value>YES</Value>"
1808 : " <Value>NO</Value>"
1809 : "</Option>"
1810 : "<Option name='SRC_METHOD' alias='METHOD' type='string-select' "
1811 : "description='"
1812 : "Force only one geolocation method to be considered on the source "
1813 : "dataset. Will be used for pixel/line to georef transformation on "
1814 : "the source dataset. NO_GEOTRANSFORM can be used to specify the "
1815 : "identity geotransform (ungeoreferenced image)'>"
1816 : " <Value>GEOTRANSFORM</Value>"
1817 : " <Value>GCP_POLYNOMIAL</Value>"
1818 : " <Value>GCP_TPS</Value>"
1819 : " <Value>GCP_HOMOGRAPHY</Value>"
1820 : " <Value>GEOLOC_ARRAY</Value>"
1821 : " <Value>RPC</Value>"
1822 : " <Value>NO_GEOTRANSFORM</Value>"
1823 : "</Option>"
1824 : "<Option name='DST_METHOD' type='string-select' description='"
1825 : "Force only one geolocation method to be considered on the target "
1826 : "dataset. Will be used for pixel/line to georef transformation on "
1827 : "the targe dataset. NO_GEOTRANSFORM can be used to specify the "
1828 : "identity geotransform (ungeoreferenced image)'>"
1829 : " <Value>GEOTRANSFORM</Value>"
1830 : " <Value>GCP_POLYNOMIAL</Value>"
1831 : " <Value>GCP_TPS</Value>"
1832 : " <Value>GCP_HOMOGRAPHY</Value>"
1833 : " <Value>GEOLOC_ARRAY</Value>"
1834 : " <Value>RPC</Value>"
1835 : " <Value>NO_GEOTRANSFORM</Value>"
1836 : "</Option>"
1837 : "<Option name='RPC_HEIGHT' type='float' description='"
1838 : "A fixed height to be used with RPC calculations. If RPC_HEIGHT and "
1839 : "RPC_DEM are not specified but that the RPC metadata domain contains"
1840 : " a HEIGHT_DEFAULT item (for example, the DIMAP driver may fill it),"
1841 : "this value will be used as the RPC_HEIGHT. Otherwise, if none of "
1842 : "RPC_HEIGHT and RPC_DEM are specified as transformer options and "
1843 : "if HEIGHT_DEFAULT is no available, a height of 0 will be used.'/>"
1844 : "<Option name='RPC_DEM' type='string' description='"
1845 : "Name of a GDAL dataset (a DEM file typically) used to extract "
1846 : "elevation offsets from. In this situation the Z passed into the "
1847 : "transformation function is assumed to be height above ground. "
1848 : "This option should be used in replacement of RPC_HEIGHT to provide "
1849 : "a way of defining a non uniform ground for the target scene.'/>"
1850 : "<Option name='RPC_HEIGHT_SCALE' type='float' description='"
1851 : "Factor used to multiply heights above ground. Useful when "
1852 : "elevation offsets of the DEM are not expressed in meters.'/>"
1853 : "<Option name='RPC_DEMINTERPOLATION' type='string-select' "
1854 : "description='DEM interpolation method' default='BILINEAR'>"
1855 : " <Value>NEAR</Value>"
1856 : " <Value>BILINEAR</Value>"
1857 : " <Value>CUBIC</Value>"
1858 : "</Option>"
1859 : "<Option name='RPC_DEM_MISSING_VALUE' type='float' description='"
1860 : "Value of DEM height that must be used in case the DEM has nodata "
1861 : "value at the sampling point, or if its extent does not cover the "
1862 : "requested coordinate. When not specified, missing values will "
1863 : "cause a failed transform.'/>"
1864 : "<Option name='RPC_DEM_SRS' type='string' description='"
1865 : "WKT SRS, or any string recognized by "
1866 : "OGRSpatialReference::SetFromUserInput(), to be used as an "
1867 : "override for DEM SRS. Useful if DEM SRS does not have an explicit "
1868 : "vertical component.'/>"
1869 : "<Option name='RPC_DEM_APPLY_VDATUM_SHIFT' type='boolean' "
1870 : "description='"
1871 : "Whether the vertical component of a compound SRS for the DEM "
1872 : "should be used (when it is present). This is useful so as to "
1873 : "be able to transform the raw values from the DEM expressed with "
1874 : "respect to a geoid to the heights with respect to the WGS84 "
1875 : "ellipsoid. When this is enabled, the GTIFF_REPORT_COMPD_CS "
1876 : "configuration option will be also set temporarily so as to get "
1877 : "the vertical information from GeoTIFF files.' default='YES'/>"
1878 : "<Option name='RPC_PIXEL_ERROR_THRESHOLD' type='float' description='"
1879 : "Overrides the dfPixErrThreshold parameter, i.e. the error "
1880 : "(measured in pixels) allowed in the iterative solution of "
1881 : "pixel/line to lat/long computations (the other way is always "
1882 : "exact given the equations).'/>"
1883 : "<Option name='RPC_MAX_ITERATIONS' type='int' description='"
1884 : "Maximum number of iterations allowed in the iterative solution of "
1885 : "pixel/line to lat/long computations. Default value is 10 in the "
1886 : "absence of a DEM, or 20 if there is a DEM.'/>"
1887 : "<Option name='RPC_FOOTPRINT' type='string' description='"
1888 : "WKT or GeoJSON polygon (in long / lat coordinate space) with a "
1889 : "validity footprint for the RPC. Any coordinate transformation that "
1890 : "goes from or arrive outside this footprint will be considered "
1891 : "invalid. This* is useful in situations where the RPC values become "
1892 : "highly unstable outside of the area on which they have been "
1893 : "computed for, potentially leading to undesirable \"echoes\" / "
1894 : "false positives. This requires GDAL to be built against GEOS..'/>"
1895 : "<Option name='RPC_MAX_ITERATIONS' type='int' description='"
1896 : "Maximum number of iterations allowed in the iterative solution of "
1897 : "pixel/line to lat/long computations. Default value is 10 in the "
1898 : "absence of a DEM, or 20 if there is a DEM.'/>"
1899 : "<Option name='INSERT_CENTER_LONG' type='boolean' description='"
1900 : "May be set to FALSE to disable setting up a CENTER_LONG value on "
1901 : "the coordinate system to rewrap things around the center of the "
1902 : "image.' default='YES'/>"
1903 : "<Option name='SRC_APPROX_ERROR_IN_SRS_UNIT' type='float' "
1904 : "description='"
1905 : "Use an approximate transformer for the source transformer. Must be "
1906 : "defined together with SRC_APPROX_ERROR_IN_PIXEL to be taken into "
1907 : "account.'/>"
1908 : "<Option name='SRC_APPROX_ERROR_IN_PIXEL' type='float' "
1909 : "description='"
1910 : "Use an approximate transformer for the source transformer. Must be "
1911 : "defined together with SRC_APPROX_ERROR_IN_SRS_UNIT to be taken "
1912 : "into "
1913 : "account.'/>"
1914 : "<Option name='DST_APPROX_ERROR_IN_SRS_UNIT' type='float' "
1915 : "description='"
1916 : "Use an approximate transformer for the target transformer. Must be "
1917 : "defined together with DST_APPROX_ERROR_IN_PIXEL to be taken into "
1918 : "account.'/>"
1919 : "<Option name='DST_APPROX_ERROR_IN_PIXEL' type='float' "
1920 : "description='"
1921 : "Use an approximate transformer for the target transformer. Must be "
1922 : "defined together with DST_APPROX_ERROR_IN_SRS_UNIT to be taken "
1923 : "into "
1924 : "account.'/>"
1925 : "<Option name='REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT' "
1926 : "type='float' "
1927 : "description='"
1928 : "Use an approximate transformer for the coordinate reprojection. "
1929 : "Must be used together with "
1930 : "REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT to be taken into "
1931 : "account.'/>"
1932 : "<Option name='REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT' "
1933 : "type='float' "
1934 : "description='"
1935 : "Use an approximate transformer for the coordinate reprojection. "
1936 : "Must be used together with "
1937 : "REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT to be taken into "
1938 : "account.'/>"
1939 : "<Option name='AREA_OF_INTEREST' type='string' "
1940 : "description='"
1941 : "Area of interest, as "
1942 : "west_lon_deg,south_lat_deg,east_lon_deg,north_lat_deg, used to "
1943 : "compute the best coordinate operation between the source and "
1944 : "target SRS. If not specified, the bounding box of the source "
1945 : "raster will be used.'/>"
1946 : "<Option name='TARGET_EXTENT' type='string' "
1947 : "description='Target extent as minx,miny,maxx,maxy expressed in "
1948 : "target SRS.'/>"
1949 : "<Option name='GEOLOC_BACKMAP_OVERSAMPLE_FACTOR' type='float' "
1950 : "min='0.1' max='2' description='"
1951 : "Oversample factor used to derive the size of the \"backmap\" used "
1952 : "for geolocation array transformers.' default='1.3'/>"
1953 : "<Option name='GEOLOC_USE_TEMP_DATASETS' type='boolean' "
1954 : "description='"
1955 : "Whether temporary GeoTIFF datasets should be used to store the "
1956 : "backmap. The default is NO, that is to use in-memory arrays, "
1957 : "unless the number of pixels of the geolocation array is greater "
1958 : "than 16 megapixels.' default='NO'/>"
1959 : "<Option name='GEOLOC_ARRAY' alias='SRC_GEOLOC_ARRAY' type='string' "
1960 : "description='"
1961 : "Name of a GDAL dataset containing a geolocation array and "
1962 : "associated metadata. This is an alternative to having geolocation "
1963 : "information described in the GEOLOCATION metadata domain of the "
1964 : "source dataset. The dataset specified may have a GEOLOCATION "
1965 : "metadata domain containing appropriate metadata, however default "
1966 : "values are assigned for all omitted items. X_BAND defaults to 1 "
1967 : "and Y_BAND to 2, however the dataset must contain exactly 2 bands. "
1968 : "PIXEL_OFFSET and LINE_OFFSET default to 0. PIXEL_STEP and "
1969 : "LINE_STEP default to the ratio of the width/height of the source "
1970 : "dataset divided by the with/height of the geolocation array. "
1971 : "SRS defaults to the spatial reference system of the geolocation "
1972 : "array dataset, if set, otherwise WGS84 is used. "
1973 : "GEOREFERENCING_CONVENTION is selected from the main metadata "
1974 : "domain if it is omitted from the GEOLOCATION domain, and if not "
1975 : "available TOP_LEFT_CORNER is assigned as a default. "
1976 : "If GEOLOC_ARRAY is set SRC_METHOD defaults to GEOLOC_ARRAY.'/>"
1977 : "<Option name='DST_GEOLOC_ARRAY' type='string' "
1978 : "description='"
1979 : "Name of a GDAL dataset that contains at least 2 bands with the X "
1980 : "and Y geolocation bands. This is an alternative to having "
1981 : "geolocation information described in the GEOLOCATION metadata "
1982 : "domain of the destination dataset. See SRC_GEOLOC_ARRAY "
1983 : "description for details, assumptions, and defaults. If this "
1984 : "option is set, DST_METHOD=GEOLOC_ARRAY will be assumed if not "
1985 : "set.'/>"
1986 : "<Option name='GEOLOC_NORMALIZE_LONGITUDE_MINUS_180_PLUS_180' "
1987 : "type='boolean' "
1988 : "description='"
1989 : "Force geolocation longitudes into -180,180 when longitude/latitude "
1990 : "is the coordinate system of the geolocation arrays' default='NO'>"
1991 : " <Value>YES</Value>"
1992 : " <Value>NO</Value>"
1993 : "</Option>"
1994 : "<Option name='NUM_THREADS' type='string' "
1995 : "description='Number of threads to use'/>"
1996 2341 : "</OptionList>";
1997 : }
1998 :
1999 : /************************************************************************/
2000 : /* GDALCreateGenImgProjTransformer2() */
2001 : /************************************************************************/
2002 :
2003 : /* clang-format off */
2004 : /**
2005 : * Create image to image transformer.
2006 : *
2007 : * This function creates a transformation object that maps from pixel/line
2008 : * coordinates on one image to pixel/line coordinates on another image. The
2009 : * images may potentially be georeferenced in different coordinate systems,
2010 : * and may used GCPs to map between their pixel/line coordinates and
2011 : * georeferenced coordinates (as opposed to the default assumption that their
2012 : * geotransform should be used).
2013 : *
2014 : * This transformer potentially performs three concatenated transformations.
2015 : *
2016 : * The first stage is from source image pixel/line coordinates to source
2017 : * image georeferenced coordinates, and may be done using the geotransform,
2018 : * or if not defined using a polynomial model derived from GCPs. If GCPs
2019 : * are used this stage is accomplished using GDALGCPTransform().
2020 : *
2021 : * The second stage is to change projections from the source coordinate system
2022 : * to the destination coordinate system, assuming they differ. This is
2023 : * accomplished internally using GDALReprojectionTransform().
2024 : *
2025 : * The third stage is converting from destination image georeferenced
2026 : * coordinates to destination image coordinates. This is done using the
2027 : * destination image geotransform, or if not available, using a polynomial
2028 : * model derived from GCPs. If GCPs are used this stage is accomplished using
2029 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
2030 : * transformation is created.
2031 : *
2032 : * Supported Options (specified with the -to switch of gdalwarp for example):
2033 : * <ul>
2034 : * <li> SRC_SRS: WKT SRS, or any string recognized by
2035 : * OGRSpatialReference::SetFromUserInput(), to be used as an override for
2036 : * hSrcDS.</li>
2037 : * <li> DST_SRS: WKT SRS, or any string recognized by
2038 : * OGRSpatialReference::SetFromUserInput(), to be used as an override for
2039 : * hDstDS.
2040 : * </li>
2041 : * <li>PROMOTE_TO_3D=YES/NO: whether to promote SRC_SRS / DST_SRS to 3D.
2042 : * Default is NO</li>
2043 : * <li> COORDINATE_OPERATION: (GDAL >= 3.0) Coordinate operation, as
2044 : * a PROJ or WKT string, used as an override over the normally computed
2045 : * pipeline. The pipeline must take into account the axis order of the source
2046 : * and target SRS.
2047 : * </li>
2048 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
2049 : * operations are allowed. Defaults to YES.</li>
2050 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
2051 : * PROJ 9.x series), PROJ may use coordinate
2052 : * operations that are not the "best" if resources (typically grids) needed
2053 : * to use them are missing. It will then fallback to other coordinate operations
2054 : * that have a lesser accuracy, for example using Helmert transformations,
2055 : * or in the absence of such operations, to ones with potential very rough
2056 : * accuracy, using "ballpark" transformations
2057 : * (see https://proj.org/glossary.html).
2058 : * When calling this method with YES, PROJ will only consider the
2059 : * "best" operation, and error out (at Transform() time) if they cannot be
2060 : * used.
2061 : * This method may be used together with ALLOW_BALLPARK=NO to
2062 : * only allow best operations that have a known accuracy.
2063 : * Note that this method has no effect on PROJ versions before 9.2.
2064 : * The default value for this option can be also set with the
2065 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
2066 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
2067 : * <li> COORDINATE_EPOCH: (GDAL >= 3.0) Coordinate epoch,
2068 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2069 : * </li>
2070 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
2071 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2072 : * </li>
2073 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of target CRS,
2074 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2075 : * </li>
2076 : * <li> GCPS_OK: If false, GCPs will not be used, default is TRUE.
2077 : * </li>
2078 : * <li> REFINE_MINIMUM_GCPS: The minimum amount of GCPs that should be available
2079 : * after the refinement.
2080 : * </li>
2081 : * <li> REFINE_TOLERANCE: The tolerance that specifies when a GCP will be
2082 : * eliminated.
2083 : * </li>
2084 : * <li> MAX_GCP_ORDER: the maximum order to use for GCP derived polynomials if
2085 : * possible. The default is to autoselect based on the number of GCPs.
2086 : * A value of -1 triggers use of Thin Plate Spline instead of polynomials if
2087 : * SRC_METHOD/DST_METHOD is not specified.
2088 : * </li>
2089 : * <li>GCP_ANTIMERIDIAN_UNWRAP=AUTO/YES/NO. (GDAL >= 3.8) Whether to
2090 : * "unwrap" longitudes of ground control points that span the antimeridian.
2091 : * For datasets with GCPs in longitude/latitude coordinate space spanning the
2092 : * antimeridian, longitudes will have a discontinuity on +/- 180 deg, and
2093 : * will result in a subset of the GCPs with longitude in the [-180,-170] range
2094 : * and another subset in [170, 180]. By default (AUTO), that situation will be
2095 : * detected and longitudes in [-180,-170] will be shifted to [180, 190] to get
2096 : * a continuous set. This option can be set to YES to force that behavior
2097 : * (useful if no SRS information is available), or to NO to disable it.
2098 : * </li>
2099 : * <li> SRC_METHOD: may have a value which is one of GEOTRANSFORM, GCP_HOMOGRAPHY,
2100 : * GCP_POLYNOMIAL, GCP_TPS, GEOLOC_ARRAY, RPC to force only one geolocation
2101 : * method to be considered on the source dataset. Will be used for pixel/line
2102 : * to georef transformation on the source dataset. NO_GEOTRANSFORM can be
2103 : * used to specify the identity geotransform (ungeoreferenced image)
2104 : * Note that using GCP_TPS with more than a few thousand GCPs requires significant RAM usage
2105 : * (at least numGCPs * numGCPs * 8 bytes) and processing time.
2106 : * </li>
2107 : * <li> DST_METHOD: may have a value which is one of GEOTRANSFORM,
2108 : * GCP_POLYNOMIAL, GCP_HOMOGRAPHY, GCP_TPS, GEOLOC_ARRAY (added in 3.5), RPC to
2109 : * force only one
2110 : * geolocation method to be considered on the target dataset. Will be used for
2111 : * pixel/line to georef transformation on the destination dataset.
2112 : * NO_GEOTRANSFORM can be used to specify the identity geotransform
2113 : * (ungeoreferenced image)
2114 : * Note that using GCP_TPS with more than a few thousand GCPs requires significant RAM usage
2115 : * (at least numGCPs * numGCPs * 8 bytes) and processing time.
2116 : * </li>
2117 : * <li> RPC_HEIGHT: A fixed height to be used with RPC
2118 : * calculations. If RPC_HEIGHT and RPC_DEM are not specified but that the RPC
2119 : * metadata domain contains a HEIGHT_DEFAULT item (for example, the DIMAP driver
2120 : * may fill it), this value will be used as the RPC_HEIGHT. Otherwise, if none
2121 : * of RPC_HEIGHT and RPC_DEM are specified as transformer
2122 : * options and if HEIGHT_DEFAULT is no available, a height of 0 will be used.
2123 : * </li>
2124 : * <li> RPC_DEM: The name of a DEM file to be used with RPC
2125 : * calculations. See GDALCreateRPCTransformerV2() for more details.
2126 : * </li>
2127 : * <li> Other RPC related options. See GDALCreateRPCTransformerV2()
2128 : * </li>
2129 : * <li>
2130 : * INSERT_CENTER_LONG: May be set to FALSE to disable setting up a CENTER_LONG
2131 : * value on the coordinate system to rewrap things around the center of the
2132 : * image.
2133 : * </li>
2134 : * <li> SRC_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL
2135 : * >= 2.2) Use an approximate transformer for the source transformer. Must be
2136 : * defined together with SRC_APPROX_ERROR_IN_PIXEL to be taken into account.
2137 : * </li>
2138 : * <li> SRC_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use
2139 : * an approximate transformer for the source transformer.. Must be defined
2140 : * together with SRC_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2141 : * </li>
2142 : * <li>
2143 : * DST_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL >= 2.2) Use
2144 : * an approximate transformer for the destination transformer. Must be defined
2145 : * together with DST_APPROX_ERROR_IN_PIXEL to be taken into account.
2146 : * </li>
2147 : * <li>
2148 : * DST_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use an
2149 : * approximate transformer for the destination transformer. Must be defined
2150 : * together with DST_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2151 : * </li>
2152 : * <li>
2153 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT=err_threshold_in_src_SRS_units.
2154 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2155 : * reprojection. Must be used together with
2156 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT to be taken into account.
2157 : * </li>
2158 : * <li>
2159 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT=err_threshold_in_dst_SRS_units.
2160 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2161 : * reprojection. Must be used together with
2162 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT to be taken into account.
2163 : * </li>
2164 : * <li>
2165 : * AREA_OF_INTEREST=west_lon_deg,south_lat_deg,east_lon_deg,north_lat_deg. (GDAL
2166 : * >= 3.0) Area of interest, used to compute the best coordinate operation
2167 : * between the source and target SRS. If not specified, the bounding box of the
2168 : * source raster will be used.
2169 : * </li>
2170 : * <li> GEOLOC_BACKMAP_OVERSAMPLE_FACTOR=[0.1,2]. (GDAL >= 3.5) Oversample
2171 : * factor used to derive the size of the "backmap" used for geolocation array
2172 : * transformers. Default value is 1.3.
2173 : * </li>
2174 : * <li> GEOLOC_USE_TEMP_DATASETS=YES/NO.
2175 : * (GDAL >= 3.5) Whether temporary GeoTIFF datasets should be used to store
2176 : * the backmap. The default is NO, that is to use in-memory arrays, unless the
2177 : * number of pixels of the geolocation array is greater than 16 megapixels.
2178 : * </li>
2179 : * <li>
2180 : * GEOLOC_ARRAY/SRC_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a GDAL
2181 : * dataset containing a geolocation array and associated metadata. This is an
2182 : * alternative to having geolocation information described in the GEOLOCATION
2183 : * metadata domain of the source dataset. The dataset specified may have a
2184 : * GEOLOCATION metadata domain containing appropriate metadata, however default
2185 : * values are assigned for all omitted items. X_BAND defaults to 1 and Y_BAND to
2186 : * 2, however the dataset must contain exactly 2 bands. PIXEL_OFFSET and
2187 : * LINE_OFFSET default to 0. PIXEL_STEP and LINE_STEP default to the ratio of
2188 : * the width/height of the source dataset divided by the with/height of the
2189 : * geolocation array. SRS defaults to the geolocation array dataset's spatial
2190 : * reference system if set, otherwise WGS84 is used.
2191 : * GEOREFERENCING_CONVENTION is selected from the main metadata domain if it
2192 : * is omitted from the GEOLOCATION domain, and if not available
2193 : * TOP_LEFT_CORNER is assigned as a default.
2194 : * If GEOLOC_ARRAY is set SRC_METHOD
2195 : * defaults to GEOLOC_ARRAY.
2196 : * </li>
2197 : * <li>DST_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a
2198 : * GDAL dataset that contains at least 2 bands with the X and Y geolocation
2199 : * bands. This is an alternative to having geolocation information described in
2200 : * the GEOLOCATION metadata domain of the destination dataset. See
2201 : * SRC_GEOLOC_ARRAY description for details, assumptions, and defaults. If this
2202 : * option is set, DST_METHOD=GEOLOC_ARRAY will be assumed if not set.
2203 : * </li>
2204 : * <li>GEOLOC_NORMALIZE_LONGITUDE_MINUS_180_PLUS_180=YES/NO. (GDAL >= 3.12.0)
2205 : * Whether to force geolocation longitudes into -180,180 when longitude/latitude is
2206 : * the coordinate system of the geolocation arrays. The default is to enable this mode
2207 : * when the values in the geolocation array are in the -180,180, otherwise NO.
2208 : * </li>
2209 : * </ul>
2210 : *
2211 : * The use case for the *_APPROX_ERROR_* options is when defining an approximate
2212 : * transformer on top of the GenImgProjTransformer globally is not practical.
2213 : * Such a use case is when the source dataset has RPC with a RPC DEM. In such
2214 : * case we don't want to use the approximate transformer on the RPC
2215 : * transformation, as the RPC DEM generally involves non-linearities that the
2216 : * approximate transformer will not detect. In such case, we must a
2217 : * non-approximated GenImgProjTransformer, but it might be worthwhile to use
2218 : * approximate sub- transformers, for example on coordinate reprojection. For
2219 : * example if warping from a source dataset with RPC to a destination dataset
2220 : * with a UTM projection, since the inverse UTM transformation is rather costly.
2221 : * In which case, one can use the REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT and
2222 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT options.
2223 : *
2224 : * The list of supported options can also be programmatically obtained with
2225 : * GDALGetGenImgProjTranformerOptionList().
2226 : *
2227 : * @param hSrcDS source dataset, or NULL.
2228 : * @param hDstDS destination dataset (or NULL).
2229 : * @param papszOptions NULL-terminated list of string options (or NULL).
2230 : *
2231 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2232 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2233 : */
2234 : /* clang-format on */
2235 :
2236 2340 : void *GDALCreateGenImgProjTransformer2(GDALDatasetH hSrcDS, GDALDatasetH hDstDS,
2237 : CSLConstList papszOptions)
2238 :
2239 : {
2240 2340 : GDALValidateOptions(nullptr, GDALGetGenImgProjTranformerOptionList(),
2241 : papszOptions, "option", "transformer options");
2242 :
2243 2340 : double dfWestLongitudeDeg = 0.0;
2244 2340 : double dfSouthLatitudeDeg = 0.0;
2245 2340 : double dfEastLongitudeDeg = 0.0;
2246 2340 : double dfNorthLatitudeDeg = 0.0;
2247 2340 : bool bHasAreaOfInterest = false;
2248 2340 : if (const char *pszAreaOfInterest =
2249 2340 : CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST"))
2250 : {
2251 : const CPLStringList aosTokens(
2252 0 : CSLTokenizeString2(pszAreaOfInterest, ", ", 0));
2253 0 : if (aosTokens.size() == 4)
2254 : {
2255 0 : dfWestLongitudeDeg = CPLAtof(aosTokens[0]);
2256 0 : dfSouthLatitudeDeg = CPLAtof(aosTokens[1]);
2257 0 : dfEastLongitudeDeg = CPLAtof(aosTokens[2]);
2258 0 : dfNorthLatitudeDeg = CPLAtof(aosTokens[3]);
2259 0 : bHasAreaOfInterest = true;
2260 : }
2261 : }
2262 :
2263 2340 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
2264 :
2265 : const auto SetAxisMapping =
2266 4615 : [papszOptions](OGRSpatialReference &oSRS, const char *pszPrefix)
2267 : {
2268 1539 : const char *pszMapping = CSLFetchNameValue(
2269 3078 : papszOptions, std::string(pszPrefix)
2270 1539 : .append("_DATA_AXIS_TO_SRS_AXIS_MAPPING")
2271 : .c_str());
2272 1539 : if (pszMapping)
2273 : {
2274 4 : CPLStringList aosTokens(CSLTokenizeString2(pszMapping, ",", 0));
2275 4 : std::vector<int> anMapping;
2276 6 : for (int i = 0; i < aosTokens.size(); ++i)
2277 4 : anMapping.push_back(atoi(aosTokens[i]));
2278 2 : oSRS.SetDataAxisToSRSAxisMapping(anMapping);
2279 : }
2280 : else
2281 : {
2282 1537 : const char *pszStrategy = CSLFetchNameValueDef(
2283 : papszOptions,
2284 3074 : std::string(pszPrefix).append("_AXIS_MAPPING_STRATEGY").c_str(),
2285 : "TRADITIONAL_GIS_ORDER");
2286 1537 : if (EQUAL(pszStrategy, "TRADITIONAL_GIS_ORDER"))
2287 1536 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2288 1 : else if (EQUAL(pszStrategy, "AUTHORITY_COMPLIANT"))
2289 1 : oSRS.SetAxisMappingStrategy(OAMS_AUTHORITY_COMPLIANT);
2290 : else
2291 : {
2292 0 : CPLError(CE_Warning, CPLE_AppDefined,
2293 : "Unrecognized value '%s' for %s", pszStrategy,
2294 0 : std::string(pszPrefix)
2295 0 : .append("_AXIS_MAPPING_STRATEGY")
2296 : .c_str());
2297 0 : return false;
2298 : }
2299 : }
2300 1539 : return true;
2301 2340 : };
2302 :
2303 : /* -------------------------------------------------------------------- */
2304 : /* Initialize the transform info. */
2305 : /* -------------------------------------------------------------------- */
2306 : GDALGenImgProjTransformInfo *psInfo =
2307 2340 : GDALCreateGenImgProjTransformerInternal();
2308 :
2309 : const auto DealWithForwardOrInverse =
2310 4666 : [bHasAreaOfInterest, &dfWestLongitudeDeg, &dfSouthLatitudeDeg,
2311 : &dfEastLongitudeDeg, &dfNorthLatitudeDeg, pszCO, papszOptions,
2312 : &SetAxisMapping](GDALGenImgProjTransformPart &part, GDALDatasetH hDS,
2313 : const char *pszPrefix, OGRSpatialReference &oSRS,
2314 44574 : bool &bCanUseGeoTransform)
2315 : {
2316 : const int nOrder =
2317 4666 : atoi(CSLFetchNameValueDef(papszOptions, "MAX_GCP_ORDER", "0"));
2318 :
2319 : const bool bGCPUseOK =
2320 4666 : CPLTestBool(CSLFetchNameValueDef(papszOptions, "GCPS_OK", "YES"));
2321 4666 : const int nMinimumGcps = atoi(
2322 : CSLFetchNameValueDef(papszOptions, "REFINE_MINIMUM_GCPS", "-1"));
2323 :
2324 : const char *pszRefineTolerance =
2325 4666 : CSLFetchNameValue(papszOptions, "REFINE_TOLERANCE");
2326 4666 : const bool bRefine = pszRefineTolerance != nullptr;
2327 : const double dfTolerance =
2328 4666 : pszRefineTolerance ? CPLAtof(pszRefineTolerance) : 0.0;
2329 :
2330 : const std::string osSRSOptionName =
2331 13998 : std::string(pszPrefix).append("_SRS");
2332 : const char *pszSRS =
2333 4666 : CSLFetchNameValue(papszOptions, osSRSOptionName.c_str());
2334 4666 : if (pszSRS)
2335 : {
2336 3074 : if (pszSRS[0] != '\0' &&
2337 1535 : oSRS.SetFromUserInput(pszSRS) != OGRERR_NONE)
2338 : {
2339 0 : CPLError(CE_Failure, CPLE_AppDefined,
2340 : "Failed to import coordinate system `%s'.", pszSRS);
2341 0 : return false;
2342 : }
2343 1539 : if (!SetAxisMapping(oSRS, osSRSOptionName.c_str()))
2344 0 : return false;
2345 : }
2346 :
2347 4666 : CSLConstList papszMD = nullptr;
2348 : GDALRPCInfoV2 sRPCInfo;
2349 :
2350 4666 : bCanUseGeoTransform = false;
2351 :
2352 4666 : const char *pszMethod = CSLFetchNameValue(
2353 9332 : papszOptions, std::string(pszPrefix).append("_METHOD").c_str());
2354 4666 : if (!pszMethod && EQUAL(pszPrefix, "SRC"))
2355 2300 : pszMethod = CSLFetchNameValue(papszOptions, "METHOD");
2356 :
2357 4666 : const char *pszGeolocArray = CSLFetchNameValue(
2358 : papszOptions,
2359 9332 : std::string(pszPrefix).append("_GEOLOC_ARRAY").c_str());
2360 4666 : if (!pszGeolocArray && EQUAL(pszPrefix, "SRC"))
2361 2339 : pszGeolocArray = CSLFetchNameValue(papszOptions, "GEOLOC_ARRAY");
2362 4666 : if (!pszMethod && pszGeolocArray != nullptr)
2363 9 : pszMethod = "GEOLOC_ARRAY";
2364 :
2365 : /* -------------------------------------------------------------------- */
2366 : /* Get forward and inverse geotransform for the source image. */
2367 : /* -------------------------------------------------------------------- */
2368 4666 : if (hDS == nullptr ||
2369 101 : (pszMethod != nullptr && EQUAL(pszMethod, "NO_GEOTRANSFORM")))
2370 : {
2371 1906 : part.adfGeoTransform[0] = 0.0;
2372 1906 : part.adfGeoTransform[1] = 1.0;
2373 1906 : part.adfGeoTransform[2] = 0.0;
2374 1906 : part.adfGeoTransform[3] = 0.0;
2375 1906 : part.adfGeoTransform[4] = 0.0;
2376 1906 : part.adfGeoTransform[5] = 1.0;
2377 1906 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2378 : sizeof(double) * 6);
2379 : }
2380 5449 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOTRANSFORM")) &&
2381 2689 : GDALGetGeoTransform(hDS, part.adfGeoTransform) == CE_None)
2382 : {
2383 2606 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2384 2606 : part.adfInvGeoTransform))
2385 : {
2386 0 : CPLError(CE_Failure, CPLE_AppDefined,
2387 : "Cannot invert geotransform");
2388 0 : return false;
2389 : }
2390 2606 : if (pszSRS == nullptr)
2391 : {
2392 2322 : auto hSRS = GDALGetSpatialRef(hDS);
2393 2322 : if (hSRS)
2394 1699 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2395 : }
2396 2606 : if (EQUAL(pszPrefix, "SRC"))
2397 : {
2398 1843 : if (!bHasAreaOfInterest && pszCO == nullptr && !oSRS.IsEmpty())
2399 : {
2400 1531 : GDALComputeAreaOfInterest(
2401 1531 : &oSRS, part.adfGeoTransform, GDALGetRasterXSize(hDS),
2402 : GDALGetRasterYSize(hDS), dfWestLongitudeDeg,
2403 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2404 : dfNorthLatitudeDeg);
2405 : }
2406 1843 : bCanUseGeoTransform = true;
2407 : }
2408 : }
2409 154 : else if (bGCPUseOK &&
2410 83 : ((pszMethod == nullptr && GDALGetGCPCount(hDS) >= 4 &&
2411 154 : GDALGetGCPCount(hDS) < 6) ||
2412 71 : (pszMethod != nullptr &&
2413 309 : EQUAL(pszMethod, "GCP_HOMOGRAPHY"))) &&
2414 24 : GDALGetGCPCount(hDS) > 0)
2415 : {
2416 24 : if (pszSRS == nullptr)
2417 : {
2418 24 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2419 24 : if (hSRS)
2420 21 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2421 : }
2422 :
2423 24 : const auto nGCPCount = GDALGetGCPCount(hDS);
2424 24 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2425 24 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2426 : papszOptions);
2427 :
2428 24 : part.pTransformArg =
2429 24 : GDALCreateHomographyTransformerFromGCPs(nGCPCount, pasGCPList);
2430 :
2431 24 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2432 24 : CPLFree(pasGCPList);
2433 :
2434 24 : if (part.pTransformArg == nullptr)
2435 : {
2436 0 : return false;
2437 : }
2438 24 : part.pTransformer = GDALHomographyTransform;
2439 : }
2440 130 : else if (bGCPUseOK &&
2441 130 : ((pszMethod == nullptr && nOrder >= 0) ||
2442 264 : (pszMethod && EQUAL(pszMethod, "GCP_POLYNOMIAL"))) &&
2443 64 : GDALGetGCPCount(hDS) > 0)
2444 : {
2445 9 : const int nSanitizedOrder = std::max(0, nOrder);
2446 :
2447 9 : if (pszSRS == nullptr)
2448 : {
2449 9 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2450 9 : if (hSRS)
2451 9 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2452 : }
2453 :
2454 9 : const auto nGCPCount = GDALGetGCPCount(hDS);
2455 9 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2456 9 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2457 : papszOptions);
2458 :
2459 9 : if (bRefine)
2460 : {
2461 0 : part.pTransformArg = GDALCreateGCPRefineTransformer(
2462 : nGCPCount, pasGCPList, nSanitizedOrder, FALSE, dfTolerance,
2463 : nMinimumGcps);
2464 : }
2465 : else
2466 : {
2467 9 : part.pTransformArg = GDALCreateGCPTransformer(
2468 : nGCPCount, pasGCPList, nSanitizedOrder, FALSE);
2469 : }
2470 :
2471 9 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2472 9 : CPLFree(pasGCPList);
2473 :
2474 9 : if (part.pTransformArg == nullptr)
2475 : {
2476 0 : return false;
2477 : }
2478 9 : part.pTransformer = GDALGCPTransform;
2479 : }
2480 :
2481 132 : else if (bGCPUseOK && GDALGetGCPCount(hDS) > 0 &&
2482 11 : ((pszMethod == nullptr && nOrder < 0) ||
2483 11 : (pszMethod && EQUAL(pszMethod, "GCP_TPS"))))
2484 : {
2485 11 : if (pszSRS == nullptr)
2486 : {
2487 11 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2488 11 : if (hSRS)
2489 10 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2490 : }
2491 :
2492 11 : const auto nGCPCount = GDALGetGCPCount(hDS);
2493 11 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2494 11 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2495 : papszOptions);
2496 :
2497 11 : part.pTransformArg = GDALCreateTPSTransformerInt(
2498 : nGCPCount, pasGCPList, FALSE, papszOptions);
2499 :
2500 11 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2501 11 : CPLFree(pasGCPList);
2502 :
2503 11 : if (part.pTransformArg == nullptr)
2504 : {
2505 2 : return false;
2506 : }
2507 9 : part.pTransformer = GDALTPSTransform;
2508 : }
2509 :
2510 55 : else if ((pszMethod == nullptr || EQUAL(pszMethod, GDAL_MDD_RPC)) &&
2511 211 : (papszMD = GDALGetMetadata(hDS, GDAL_MDD_RPC)) != nullptr &&
2512 46 : GDALExtractRPCInfoV2(papszMD, &sRPCInfo))
2513 : {
2514 46 : CPLStringList aosOptions(papszOptions);
2515 87 : if (!CSLFetchNameValue(papszOptions, "RPC_HEIGHT") &&
2516 41 : !CSLFetchNameValue(papszOptions, "RPC_DEM"))
2517 : {
2518 8 : if (const char *pszHEIGHT_DEFAULT =
2519 8 : CSLFetchNameValue(papszMD, "HEIGHT_DEFAULT"))
2520 : {
2521 1 : CPLDebug("GDAL",
2522 : "For %s, using RPC_HEIGHT = HEIGHT_DEFAULT = %s",
2523 : pszPrefix, pszHEIGHT_DEFAULT);
2524 1 : aosOptions.SetNameValue("RPC_HEIGHT", pszHEIGHT_DEFAULT);
2525 : }
2526 : }
2527 46 : part.pTransformArg = GDALCreateRPCTransformerV2(&sRPCInfo, FALSE, 0,
2528 46 : aosOptions.List());
2529 46 : if (part.pTransformArg == nullptr)
2530 : {
2531 1 : return false;
2532 : }
2533 45 : part.pTransformer = GDALRPCTransform;
2534 45 : if (pszSRS == nullptr)
2535 : {
2536 45 : oSRS.SetFromUserInput(SRS_WKT_WGS84_LAT_LONG);
2537 45 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2538 : }
2539 : }
2540 :
2541 127 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOLOC_ARRAY")) &&
2542 63 : ((papszMD = GDALGetMetadata(hDS, GDAL_MDD_GEOLOCATION)) !=
2543 17 : nullptr ||
2544 : pszGeolocArray != nullptr))
2545 : {
2546 56 : CPLStringList aosGeolocMD; // keep in this scope
2547 56 : if (pszGeolocArray != nullptr)
2548 : {
2549 10 : if (papszMD != nullptr)
2550 : {
2551 0 : CPLError(
2552 : CE_Warning, CPLE_AppDefined,
2553 : "Both GEOLOCATION metadata domain on the source "
2554 : "dataset "
2555 : "and [%s_]GEOLOC_ARRAY transformer option are set. "
2556 : "Only using the later.",
2557 : pszPrefix);
2558 : }
2559 10 : aosGeolocMD = GDALCreateGeolocationMetadata(
2560 : hDS, pszGeolocArray,
2561 10 : /* bIsSource= */ EQUAL(pszPrefix, "SRC"));
2562 10 : if (aosGeolocMD.empty())
2563 : {
2564 3 : return false;
2565 : }
2566 7 : papszMD = aosGeolocMD.List();
2567 : }
2568 :
2569 53 : part.pTransformArg = GDALCreateGeoLocTransformerEx(
2570 : hDS, papszMD, FALSE, nullptr, papszOptions);
2571 53 : if (part.pTransformArg == nullptr)
2572 : {
2573 2 : return false;
2574 : }
2575 51 : part.pTransformer = GDALGeoLocTransform;
2576 51 : if (pszSRS == nullptr)
2577 : {
2578 51 : pszSRS = CSLFetchNameValue(papszMD, "SRS");
2579 51 : if (pszSRS)
2580 : {
2581 48 : oSRS.SetFromUserInput(pszSRS);
2582 48 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2583 : }
2584 : }
2585 : }
2586 :
2587 8 : else if (pszMethod != nullptr && EQUAL(pszPrefix, "SRC"))
2588 : {
2589 1 : CPLError(CE_Failure, CPLE_AppDefined,
2590 : "Unable to compute a %s based transformation between "
2591 : "pixel/line and georeferenced coordinates for %s.",
2592 : pszMethod, GDALGetDescription(hDS));
2593 :
2594 1 : return false;
2595 : }
2596 :
2597 : else
2598 : {
2599 7 : CPLError(CE_Failure, CPLE_AppDefined,
2600 : "Unable to compute a transformation between pixel/line "
2601 : "and georeferenced coordinates for %s. "
2602 : "There is no affine transformation and no GCPs. "
2603 : "Specify transformation option %s_METHOD=NO_GEOTRANSFORM "
2604 : "to bypass this check.",
2605 : GDALGetDescription(hDS), pszPrefix);
2606 :
2607 7 : return false;
2608 : }
2609 :
2610 : /* ---------------------------------------------------------------- */
2611 : /* Handle optional source approximation transformer. */
2612 : /* ---------------------------------------------------------------- */
2613 4650 : if (part.pTransformer)
2614 : {
2615 138 : const char *pszApproxErrorFwd = CSLFetchNameValue(
2616 276 : papszOptions, std::string(pszPrefix)
2617 138 : .append("_APPROX_ERROR_IN_SRS_UNIT")
2618 : .c_str());
2619 138 : const char *pszApproxErrorReverse = CSLFetchNameValue(
2620 276 : papszOptions, std::string(pszPrefix)
2621 138 : .append("_APPROX_ERROR_IN_PIXEL")
2622 : .c_str());
2623 138 : if (pszApproxErrorFwd && pszApproxErrorReverse)
2624 : {
2625 1 : void *pArg = GDALCreateApproxTransformer2(
2626 : part.pTransformer, part.pTransformArg,
2627 : CPLAtof(pszApproxErrorFwd), CPLAtof(pszApproxErrorReverse));
2628 1 : if (pArg == nullptr)
2629 : {
2630 0 : return false;
2631 : }
2632 1 : part.pTransformArg = pArg;
2633 1 : part.pTransformer = GDALApproxTransform;
2634 1 : GDALApproxTransformerOwnsSubtransformer(part.pTransformArg,
2635 : TRUE);
2636 : }
2637 : }
2638 :
2639 4650 : return true;
2640 2340 : };
2641 :
2642 : /* -------------------------------------------------------------------- */
2643 : /* Get forward and inverse geotransform for the source image. */
2644 : /* -------------------------------------------------------------------- */
2645 2340 : bool bCanUseSrcGeoTransform = false;
2646 4680 : OGRSpatialReference oSrcSRS;
2647 2340 : if (!DealWithForwardOrInverse(psInfo->sSrcParams, hSrcDS, "SRC", oSrcSRS,
2648 : bCanUseSrcGeoTransform))
2649 : {
2650 14 : GDALDestroyGenImgProjTransformer(psInfo);
2651 14 : return nullptr;
2652 : }
2653 :
2654 : /* -------------------------------------------------------------------- */
2655 : /* Get forward and inverse geotransform for destination image. */
2656 : /* If we have no destination use a unit transform. */
2657 : /* -------------------------------------------------------------------- */
2658 2326 : bool bIgnored = false;
2659 4652 : OGRSpatialReference oDstSRS;
2660 2326 : if (!DealWithForwardOrInverse(psInfo->sDstParams, hDstDS, "DST", oDstSRS,
2661 : bIgnored))
2662 : {
2663 2 : GDALDestroyGenImgProjTransformer(psInfo);
2664 2 : return nullptr;
2665 : }
2666 :
2667 : /* -------------------------------------------------------------------- */
2668 : /* Setup reprojection. */
2669 : /* -------------------------------------------------------------------- */
2670 :
2671 2324 : if (CPLFetchBool(papszOptions, "@STRIP_VERT_CS", false))
2672 : {
2673 1 : if (oSrcSRS.IsCompound())
2674 : {
2675 1 : oSrcSRS.StripVertical();
2676 : }
2677 1 : if (oDstSRS.IsCompound())
2678 : {
2679 0 : oDstSRS.StripVertical();
2680 : }
2681 : }
2682 :
2683 : const bool bMayInsertCenterLong =
2684 3857 : (bCanUseSrcGeoTransform && !oSrcSRS.IsEmpty() && hSrcDS &&
2685 1533 : CPLFetchBool(papszOptions, "INSERT_CENTER_LONG", true));
2686 : const char *pszSrcCoordEpoch =
2687 2324 : CSLFetchNameValue(papszOptions, "SRC_COORDINATE_EPOCH");
2688 : const char *pszDstCoordEpoch =
2689 2324 : CSLFetchNameValue(papszOptions, "DST_COORDINATE_EPOCH");
2690 4025 : if ((!oSrcSRS.IsEmpty() && !oDstSRS.IsEmpty() &&
2691 1581 : (pszSrcCoordEpoch || pszDstCoordEpoch || !oSrcSRS.IsSame(&oDstSRS) ||
2692 4025 : (oSrcSRS.IsGeographic() && bMayInsertCenterLong))) ||
2693 : pszCO)
2694 : {
2695 1127 : CPLStringList aosOptions;
2696 :
2697 1127 : if (bMayInsertCenterLong)
2698 : {
2699 1108 : InsertCenterLong(hSrcDS, &oSrcSRS, &oDstSRS,
2700 : CSLFetchNameValue(papszOptions, "TARGET_EXTENT"),
2701 : aosOptions);
2702 : }
2703 :
2704 1127 : if (CPLFetchBool(papszOptions, "PROMOTE_TO_3D", false))
2705 : {
2706 20 : oSrcSRS.PromoteTo3D(nullptr);
2707 20 : oDstSRS.PromoteTo3D(nullptr);
2708 : }
2709 :
2710 1127 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
2711 34 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
2712 : {
2713 : aosOptions.SetNameValue(
2714 : "AREA_OF_INTEREST",
2715 : CPLSPrintf("%.16g,%.16g,%.16g,%.16g", dfWestLongitudeDeg,
2716 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2717 1093 : dfNorthLatitudeDeg));
2718 : }
2719 1127 : if (pszCO)
2720 : {
2721 7 : aosOptions.SetNameValue("COORDINATE_OPERATION", pszCO);
2722 : }
2723 :
2724 : const char *pszCoordEpoch =
2725 1127 : CSLFetchNameValue(papszOptions, "COORDINATE_EPOCH");
2726 1127 : if (pszCoordEpoch)
2727 : {
2728 1 : aosOptions.SetNameValue("COORDINATE_EPOCH", pszCoordEpoch);
2729 : }
2730 :
2731 1127 : if (pszSrcCoordEpoch)
2732 : {
2733 0 : aosOptions.SetNameValue("SRC_COORDINATE_EPOCH", pszSrcCoordEpoch);
2734 0 : oSrcSRS.SetCoordinateEpoch(CPLAtof(pszSrcCoordEpoch));
2735 : }
2736 :
2737 1127 : if (pszDstCoordEpoch)
2738 : {
2739 0 : aosOptions.SetNameValue("DST_COORDINATE_EPOCH", pszDstCoordEpoch);
2740 0 : oDstSRS.SetCoordinateEpoch(CPLAtof(pszDstCoordEpoch));
2741 : }
2742 :
2743 1127 : if (const char *pszAllowBallpark =
2744 1127 : CSLFetchNameValue(papszOptions, "ALLOW_BALLPARK"))
2745 : {
2746 2 : aosOptions.SetNameValue("ALLOW_BALLPARK", pszAllowBallpark);
2747 : }
2748 :
2749 1127 : if (const char *pszOnlyBest =
2750 1127 : CSLFetchNameValue(papszOptions, "ONLY_BEST"))
2751 : {
2752 1 : aosOptions.SetNameValue("ONLY_BEST", pszOnlyBest);
2753 : }
2754 :
2755 1131 : psInfo->pReprojectArg = GDALCreateReprojectionTransformerEx(
2756 1127 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS)
2757 : : nullptr,
2758 1127 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS)
2759 : : nullptr,
2760 1127 : aosOptions.List());
2761 :
2762 1127 : if (pszCO)
2763 : {
2764 7 : psInfo->bHasCustomTransformationPipeline = true;
2765 : }
2766 :
2767 1127 : if (psInfo->pReprojectArg == nullptr)
2768 : {
2769 5 : GDALDestroyGenImgProjTransformer(psInfo);
2770 5 : return nullptr;
2771 : }
2772 1122 : psInfo->pReproject = GDALReprojectionTransform;
2773 :
2774 : /* --------------------------------------------------------------------
2775 : */
2776 : /* Handle optional reprojection approximation transformer. */
2777 : /* --------------------------------------------------------------------
2778 : */
2779 1122 : const char *psApproxErrorFwd = CSLFetchNameValue(
2780 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT");
2781 1122 : const char *psApproxErrorReverse = CSLFetchNameValue(
2782 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT");
2783 1122 : if (psApproxErrorFwd && psApproxErrorReverse)
2784 : {
2785 1 : void *pArg = GDALCreateApproxTransformer2(
2786 : psInfo->pReproject, psInfo->pReprojectArg,
2787 : CPLAtof(psApproxErrorFwd), CPLAtof(psApproxErrorReverse));
2788 1 : if (pArg == nullptr)
2789 : {
2790 0 : GDALDestroyGenImgProjTransformer(psInfo);
2791 0 : return nullptr;
2792 : }
2793 1 : psInfo->pReprojectArg = pArg;
2794 1 : psInfo->pReproject = GDALApproxTransform;
2795 1 : GDALApproxTransformerOwnsSubtransformer(psInfo->pReprojectArg,
2796 : TRUE);
2797 : }
2798 : }
2799 :
2800 2319 : return psInfo;
2801 : }
2802 :
2803 : /************************************************************************/
2804 : /* GDALRefreshGenImgProjTransformer() */
2805 : /************************************************************************/
2806 :
2807 1391 : void GDALRefreshGenImgProjTransformer(void *hTransformArg)
2808 : {
2809 1391 : GDALGenImgProjTransformInfo *psInfo =
2810 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
2811 :
2812 2270 : if (psInfo->pReprojectArg &&
2813 879 : psInfo->bCheckWithInvertPROJ != GetCurrentCheckWithInvertPROJ())
2814 : {
2815 72 : psInfo->bCheckWithInvertPROJ = !psInfo->bCheckWithInvertPROJ;
2816 :
2817 : CPLXMLNode *psXML =
2818 72 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
2819 72 : GDALDestroyTransformer(psInfo->pReprojectArg);
2820 72 : GDALDeserializeTransformer(psXML, &psInfo->pReproject,
2821 : &psInfo->pReprojectArg);
2822 72 : CPLDestroyXMLNode(psXML);
2823 : }
2824 1391 : }
2825 :
2826 : /************************************************************************/
2827 : /* GDALCreateGenImgProjTransformer3() */
2828 : /************************************************************************/
2829 :
2830 : /**
2831 : * Create image to image transformer.
2832 : *
2833 : * This function creates a transformation object that maps from pixel/line
2834 : * coordinates on one image to pixel/line coordinates on another image. The
2835 : * images may potentially be georeferenced in different coordinate systems,
2836 : * and may used GCPs to map between their pixel/line coordinates and
2837 : * georeferenced coordinates (as opposed to the default assumption that their
2838 : * geotransform should be used).
2839 : *
2840 : * This transformer potentially performs three concatenated transformations.
2841 : *
2842 : * The first stage is from source image pixel/line coordinates to source
2843 : * image georeferenced coordinates, and may be done using the geotransform,
2844 : * or if not defined using a polynomial model derived from GCPs. If GCPs
2845 : * are used this stage is accomplished using GDALGCPTransform().
2846 : *
2847 : * The second stage is to change projections from the source coordinate system
2848 : * to the destination coordinate system, assuming they differ. This is
2849 : * accomplished internally using GDALReprojectionTransform().
2850 : *
2851 : * The third stage is converting from destination image georeferenced
2852 : * coordinates to destination image coordinates. This is done using the
2853 : * destination image geotransform, or if not available, using a polynomial
2854 : * model derived from GCPs. If GCPs are used this stage is accomplished using
2855 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
2856 : * transformation is created.
2857 : *
2858 : * @param pszSrcWKT source WKT (or NULL).
2859 : * @param padfSrcGeoTransform source geotransform (or NULL).
2860 : * @param pszDstWKT destination WKT (or NULL).
2861 : * @param padfDstGeoTransform destination geotransform (or NULL).
2862 : *
2863 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2864 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2865 : */
2866 :
2867 0 : void *GDALCreateGenImgProjTransformer3(const char *pszSrcWKT,
2868 : const double *padfSrcGeoTransform,
2869 : const char *pszDstWKT,
2870 : const double *padfDstGeoTransform)
2871 :
2872 : {
2873 0 : OGRSpatialReference oSrcSRS;
2874 0 : if (pszSrcWKT)
2875 : {
2876 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2877 0 : if (pszSrcWKT[0] != '\0' &&
2878 0 : oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
2879 : {
2880 0 : CPLError(CE_Failure, CPLE_AppDefined,
2881 : "Failed to import coordinate system `%s'.", pszSrcWKT);
2882 0 : return nullptr;
2883 : }
2884 : }
2885 :
2886 0 : OGRSpatialReference oDstSRS;
2887 0 : if (pszDstWKT)
2888 : {
2889 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2890 0 : if (pszDstWKT[0] != '\0' &&
2891 0 : oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
2892 : {
2893 0 : CPLError(CE_Failure, CPLE_AppDefined,
2894 : "Failed to import coordinate system `%s'.", pszDstWKT);
2895 0 : return nullptr;
2896 : }
2897 : }
2898 0 : return GDALCreateGenImgProjTransformer4(
2899 : OGRSpatialReference::ToHandle(&oSrcSRS), padfSrcGeoTransform,
2900 0 : OGRSpatialReference::ToHandle(&oDstSRS), padfDstGeoTransform, nullptr);
2901 : }
2902 :
2903 : /************************************************************************/
2904 : /* GDALCreateGenImgProjTransformer4() */
2905 : /************************************************************************/
2906 :
2907 : /**
2908 : * Create image to image transformer.
2909 : *
2910 : * Similar to GDALCreateGenImgProjTransformer3(), except that it takes
2911 : * OGRSpatialReferenceH objects and options.
2912 : * The options are the ones supported by GDALCreateReprojectionTransformerEx()
2913 : *
2914 : * @since GDAL 3.0
2915 : */
2916 16 : void *GDALCreateGenImgProjTransformer4(OGRSpatialReferenceH hSrcSRS,
2917 : const double *padfSrcGeoTransform,
2918 : OGRSpatialReferenceH hDstSRS,
2919 : const double *padfDstGeoTransform,
2920 : const char *const *papszOptions)
2921 : {
2922 : /* -------------------------------------------------------------------- */
2923 : /* Initialize the transform info. */
2924 : /* -------------------------------------------------------------------- */
2925 : GDALGenImgProjTransformInfo *psInfo =
2926 16 : GDALCreateGenImgProjTransformerInternal();
2927 :
2928 : /* -------------------------------------------------------------------- */
2929 : /* Get forward and inverse geotransform for the source image. */
2930 : /* -------------------------------------------------------------------- */
2931 :
2932 : const auto SetParams =
2933 30 : [](GDALGenImgProjTransformPart &part, const double *padfGT)
2934 : {
2935 30 : if (padfGT)
2936 : {
2937 30 : memcpy(part.adfGeoTransform, padfGT, sizeof(part.adfGeoTransform));
2938 30 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2939 30 : part.adfInvGeoTransform))
2940 : {
2941 2 : CPLError(CE_Failure, CPLE_AppDefined,
2942 : "Cannot invert geotransform");
2943 2 : return false;
2944 : }
2945 : }
2946 : else
2947 : {
2948 0 : part.adfGeoTransform[0] = 0.0;
2949 0 : part.adfGeoTransform[1] = 1.0;
2950 0 : part.adfGeoTransform[2] = 0.0;
2951 0 : part.adfGeoTransform[3] = 0.0;
2952 0 : part.adfGeoTransform[4] = 0.0;
2953 0 : part.adfGeoTransform[5] = 1.0;
2954 0 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2955 : sizeof(double) * 6);
2956 : }
2957 28 : return true;
2958 : };
2959 :
2960 16 : if (!SetParams(psInfo->sSrcParams, padfSrcGeoTransform))
2961 : {
2962 1 : GDALDestroyGenImgProjTransformer(psInfo);
2963 1 : return nullptr;
2964 : }
2965 :
2966 : /* -------------------------------------------------------------------- */
2967 : /* Setup reprojection. */
2968 : /* -------------------------------------------------------------------- */
2969 15 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
2970 15 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
2971 30 : if (!poSrcSRS->IsEmpty() && !poDstSRS->IsEmpty() &&
2972 15 : !poSrcSRS->IsSame(poDstSRS))
2973 : {
2974 4 : psInfo->pReprojectArg =
2975 4 : GDALCreateReprojectionTransformerEx(hSrcSRS, hDstSRS, papszOptions);
2976 4 : if (psInfo->pReprojectArg == nullptr)
2977 : {
2978 1 : GDALDestroyGenImgProjTransformer(psInfo);
2979 1 : return nullptr;
2980 : }
2981 3 : psInfo->pReproject = GDALReprojectionTransform;
2982 : }
2983 :
2984 : /* -------------------------------------------------------------------- */
2985 : /* Get forward and inverse geotransform for destination image. */
2986 : /* If we have no destination matrix use a unit transform. */
2987 : /* -------------------------------------------------------------------- */
2988 14 : if (!SetParams(psInfo->sDstParams, padfDstGeoTransform))
2989 : {
2990 1 : GDALDestroyGenImgProjTransformer(psInfo);
2991 1 : return nullptr;
2992 : }
2993 :
2994 13 : return psInfo;
2995 : }
2996 :
2997 : /************************************************************************/
2998 : /* GDALSetGenImgProjTransformerDstGeoTransform() */
2999 : /************************************************************************/
3000 :
3001 : /**
3002 : * Set GenImgProj output geotransform.
3003 : *
3004 : * Normally the "destination geotransform", or transformation between
3005 : * georeferenced output coordinates and pixel/line coordinates on the
3006 : * destination file is extracted from the destination file by
3007 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
3008 : * info. However, sometimes it is inconvenient to have an output file
3009 : * handle with appropriate geotransform information when creating the
3010 : * transformation. For these cases, this function can be used to apply
3011 : * the destination geotransform.
3012 : *
3013 : * @param hTransformArg the handle to update.
3014 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
3015 : */
3016 :
3017 1097 : void GDALSetGenImgProjTransformerDstGeoTransform(void *hTransformArg,
3018 : const double *padfGeoTransform)
3019 :
3020 : {
3021 1097 : VALIDATE_POINTER0(hTransformArg,
3022 : "GDALSetGenImgProjTransformerDstGeoTransform");
3023 :
3024 1097 : GDALGenImgProjTransformInfo *psInfo =
3025 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3026 :
3027 1097 : memcpy(psInfo->sDstParams.adfGeoTransform, padfGeoTransform,
3028 : sizeof(double) * 6);
3029 1097 : if (!GDALInvGeoTransform(psInfo->sDstParams.adfGeoTransform,
3030 1097 : psInfo->sDstParams.adfInvGeoTransform))
3031 : {
3032 0 : CPLError(CE_Failure, CPLE_AppDefined, "Cannot invert geotransform");
3033 : }
3034 : }
3035 :
3036 : /************************************************************************/
3037 : /* GDALDestroyGenImgProjTransformer() */
3038 : /************************************************************************/
3039 :
3040 : /**
3041 : * GenImgProjTransformer deallocator.
3042 : *
3043 : * This function is used to deallocate the handle created with
3044 : * GDALCreateGenImgProjTransformer().
3045 : *
3046 : * @param hTransformArg the handle to deallocate.
3047 : */
3048 :
3049 2560 : void GDALDestroyGenImgProjTransformer(void *hTransformArg)
3050 :
3051 : {
3052 2560 : if (hTransformArg == nullptr)
3053 0 : return;
3054 :
3055 2560 : GDALGenImgProjTransformInfo *psInfo =
3056 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3057 :
3058 2560 : if (psInfo->sSrcParams.pTransformArg != nullptr)
3059 152 : GDALDestroyTransformer(psInfo->sSrcParams.pTransformArg);
3060 :
3061 2560 : if (psInfo->sDstParams.pTransformArg != nullptr)
3062 7 : GDALDestroyTransformer(psInfo->sDstParams.pTransformArg);
3063 :
3064 2560 : if (psInfo->pReprojectArg != nullptr)
3065 1206 : GDALDestroyTransformer(psInfo->pReprojectArg);
3066 :
3067 2560 : CPLFree(psInfo);
3068 : }
3069 :
3070 : /************************************************************************/
3071 : /* GDALGenImgProjTransform() */
3072 : /************************************************************************/
3073 :
3074 : /**
3075 : * Perform general image reprojection transformation.
3076 : *
3077 : * Actually performs the transformation setup in
3078 : * GDALCreateGenImgProjTransformer(). This function matches the signature
3079 : * required by the GDALTransformerFunc(), and more details on the arguments
3080 : * can be found in that topic.
3081 : */
3082 :
3083 : #ifdef DEBUG_APPROX_TRANSFORMER
3084 : int countGDALGenImgProjTransform = 0;
3085 : #endif
3086 :
3087 8963920 : int GDALGenImgProjTransform(void *pTransformArgIn, int bDstToSrc,
3088 : int nPointCount, double *padfX, double *padfY,
3089 : double *padfZ, int *panSuccess)
3090 : {
3091 : // Sanity check (see issue GH #13498)
3092 8963920 : if (nullptr == pTransformArgIn)
3093 0 : return FALSE;
3094 :
3095 8963920 : GDALGenImgProjTransformInfo *psInfo =
3096 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArgIn);
3097 :
3098 : #ifdef DEBUG_APPROX_TRANSFORMER
3099 : CPLAssert(nPointCount > 0);
3100 : countGDALGenImgProjTransform += nPointCount;
3101 : #endif
3102 :
3103 33996700 : for (int i = 0; i < nPointCount; i++)
3104 : {
3105 25032800 : panSuccess[i] = (padfX[i] != HUGE_VAL && padfY[i] != HUGE_VAL);
3106 : }
3107 :
3108 8963920 : int ret = TRUE;
3109 :
3110 : /* -------------------------------------------------------------------- */
3111 : /* Convert from src (dst) pixel/line to src (dst) */
3112 : /* georeferenced coordinates. */
3113 : /* -------------------------------------------------------------------- */
3114 : {
3115 8963920 : const auto params = bDstToSrc ? psInfo->sDstParams : psInfo->sSrcParams;
3116 8963920 : const double *padfGeoTransform = params.adfGeoTransform;
3117 8963920 : void *pTransformArg = params.pTransformArg;
3118 8963920 : GDALTransformerFunc pTransformer = params.pTransformer;
3119 :
3120 8963920 : if (pTransformArg != nullptr)
3121 : {
3122 42554 : if (!pTransformer(pTransformArg, FALSE, nPointCount, padfX, padfY,
3123 : padfZ, panSuccess))
3124 1795 : ret = FALSE;
3125 : }
3126 : else
3127 : {
3128 33866500 : for (int i = 0; i < nPointCount; i++)
3129 : {
3130 24945100 : if (!panSuccess[i])
3131 2071 : continue;
3132 :
3133 24943000 : const double dfNewX = padfGeoTransform[0] +
3134 24943000 : padfX[i] * padfGeoTransform[1] +
3135 24943000 : padfY[i] * padfGeoTransform[2];
3136 24943000 : const double dfNewY = padfGeoTransform[3] +
3137 24943000 : padfX[i] * padfGeoTransform[4] +
3138 24943000 : padfY[i] * padfGeoTransform[5];
3139 :
3140 24943000 : padfX[i] = dfNewX;
3141 24943000 : padfY[i] = dfNewY;
3142 : }
3143 : }
3144 : }
3145 :
3146 : /* -------------------------------------------------------------------- */
3147 : /* Reproject if needed. */
3148 : /* -------------------------------------------------------------------- */
3149 8963920 : if (psInfo->pReprojectArg)
3150 : {
3151 8468610 : if (!psInfo->pReproject(psInfo->pReprojectArg, bDstToSrc, nPointCount,
3152 : padfX, padfY, padfZ, panSuccess))
3153 20370 : ret = FALSE;
3154 : }
3155 :
3156 : /* -------------------------------------------------------------------- */
3157 : /* Convert dst (src) georef coordinates back to pixel/line. */
3158 : /* -------------------------------------------------------------------- */
3159 : {
3160 8963920 : const auto params = bDstToSrc ? psInfo->sSrcParams : psInfo->sDstParams;
3161 8963920 : const double *padfInvGeoTransform = params.adfInvGeoTransform;
3162 8963920 : void *pTransformArg = params.pTransformArg;
3163 8963920 : GDALTransformerFunc pTransformer = params.pTransformer;
3164 :
3165 8963920 : if (pTransformArg != nullptr)
3166 : {
3167 53369 : if (!pTransformer(pTransformArg, TRUE, nPointCount, padfX, padfY,
3168 : padfZ, panSuccess))
3169 2011 : ret = FALSE;
3170 : }
3171 : else
3172 : {
3173 33030000 : for (int i = 0; i < nPointCount; i++)
3174 : {
3175 24119400 : if (!panSuccess[i])
3176 3560760 : continue;
3177 :
3178 20558700 : const double dfNewX = padfInvGeoTransform[0] +
3179 20558700 : padfX[i] * padfInvGeoTransform[1] +
3180 20558700 : padfY[i] * padfInvGeoTransform[2];
3181 20558700 : const double dfNewY = padfInvGeoTransform[3] +
3182 20558700 : padfX[i] * padfInvGeoTransform[4] +
3183 20558700 : padfY[i] * padfInvGeoTransform[5];
3184 :
3185 20558700 : padfX[i] = dfNewX;
3186 20558700 : padfY[i] = dfNewY;
3187 : }
3188 : }
3189 : }
3190 :
3191 8963920 : return ret;
3192 : }
3193 :
3194 : /************************************************************************/
3195 : /* GDALTransformLonLatToDestGenImgProjTransformer() */
3196 : /************************************************************************/
3197 :
3198 3344 : int GDALTransformLonLatToDestGenImgProjTransformer(void *hTransformArg,
3199 : double *pdfX, double *pdfY)
3200 : {
3201 3344 : GDALGenImgProjTransformInfo *psInfo =
3202 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3203 :
3204 3344 : if (psInfo->pReprojectArg == nullptr ||
3205 1830 : psInfo->pReproject != GDALReprojectionTransform)
3206 1518 : return false;
3207 :
3208 1826 : GDALReprojectionTransformInfo *psReprojInfo =
3209 : static_cast<GDALReprojectionTransformInfo *>(psInfo->pReprojectArg);
3210 3652 : if (psReprojInfo->poForwardTransform == nullptr ||
3211 1826 : psReprojInfo->poForwardTransform->GetSourceCS() == nullptr)
3212 2 : return false;
3213 :
3214 1824 : double z = 0;
3215 1824 : int success = true;
3216 1824 : auto poSourceCRS = psReprojInfo->poForwardTransform->GetSourceCS();
3217 3192 : if (poSourceCRS->IsGeographic() &&
3218 1368 : std::fabs(poSourceCRS->GetAngularUnits() -
3219 1368 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9)
3220 : {
3221 : // Optimization to avoid creating a OGRCoordinateTransformation
3222 1366 : OGRAxisOrientation eSourceFirstAxisOrient = OAO_Other;
3223 1366 : poSourceCRS->GetAxis(nullptr, 0, &eSourceFirstAxisOrient);
3224 1366 : const auto &mapping = poSourceCRS->GetDataAxisToSRSAxisMapping();
3225 2732 : if ((mapping[0] == 2 && eSourceFirstAxisOrient == OAO_East) ||
3226 1366 : (mapping[0] == 1 && eSourceFirstAxisOrient != OAO_East))
3227 : {
3228 6 : std::swap(*pdfX, *pdfY);
3229 : }
3230 : }
3231 : else
3232 : {
3233 : auto poLongLat =
3234 458 : std::unique_ptr<OGRSpatialReference>(poSourceCRS->CloneGeogCS());
3235 458 : if (poLongLat == nullptr)
3236 0 : return false;
3237 458 : poLongLat->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3238 :
3239 : const bool bCurrentCheckWithInvertProj =
3240 458 : GetCurrentCheckWithInvertPROJ();
3241 458 : if (!bCurrentCheckWithInvertProj)
3242 458 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", "YES");
3243 : auto poCT = std::unique_ptr<OGRCoordinateTransformation>(
3244 458 : OGRCreateCoordinateTransformation(poLongLat.get(), poSourceCRS));
3245 458 : if (!bCurrentCheckWithInvertProj)
3246 458 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", nullptr);
3247 458 : if (poCT == nullptr)
3248 0 : return false;
3249 :
3250 458 : poCT->SetEmitErrors(false);
3251 458 : if (!poCT->Transform(1, pdfX, pdfY))
3252 4 : return false;
3253 :
3254 454 : if (!psInfo->pReproject(psInfo->pReprojectArg, false, 1, pdfX, pdfY, &z,
3255 712 : &success) ||
3256 258 : !success)
3257 : {
3258 196 : return false;
3259 : }
3260 : }
3261 :
3262 1624 : double *padfGeoTransform = psInfo->sDstParams.adfInvGeoTransform;
3263 1624 : void *pTransformArg = psInfo->sDstParams.pTransformArg;
3264 1624 : GDALTransformerFunc pTransformer = psInfo->sDstParams.pTransformer;
3265 1624 : if (pTransformArg != nullptr)
3266 : {
3267 4 : if (!pTransformer(pTransformArg, TRUE, 1, pdfX, pdfY, &z, &success) ||
3268 0 : !success)
3269 : {
3270 4 : return false;
3271 : }
3272 : }
3273 : else
3274 : {
3275 1620 : const double dfNewX = padfGeoTransform[0] +
3276 1620 : pdfX[0] * padfGeoTransform[1] +
3277 1620 : pdfY[0] * padfGeoTransform[2];
3278 1620 : const double dfNewY = padfGeoTransform[3] +
3279 1620 : pdfX[0] * padfGeoTransform[4] +
3280 1620 : pdfY[0] * padfGeoTransform[5];
3281 :
3282 1620 : pdfX[0] = dfNewX;
3283 1620 : pdfY[0] = dfNewY;
3284 : }
3285 :
3286 1620 : return true;
3287 : }
3288 :
3289 : /************************************************************************/
3290 : /* GDALSerializeGenImgProjTransformer() */
3291 : /************************************************************************/
3292 :
3293 42 : static CPLXMLNode *GDALSerializeGenImgProjTransformer(void *pTransformArg)
3294 :
3295 : {
3296 42 : GDALGenImgProjTransformInfo *psInfo =
3297 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArg);
3298 :
3299 : CPLXMLNode *psTree =
3300 42 : CPLCreateXMLNode(nullptr, CXT_Element, "GenImgProjTransformer");
3301 :
3302 : const auto SerializePart =
3303 241 : [psTree](const char *pszPrefix, const GDALGenImgProjTransformPart &part)
3304 : {
3305 84 : char szWork[200] = {};
3306 :
3307 : /* ------------------------------------------------------------- */
3308 : /* Handle transformation. */
3309 : /* ------------------------------------------------------------- */
3310 84 : if (part.pTransformArg != nullptr)
3311 : {
3312 : CPLXMLNode *psTransformer =
3313 11 : GDALSerializeTransformer(part.pTransformer, part.pTransformArg);
3314 11 : if (psTransformer != nullptr)
3315 : {
3316 11 : CPLXMLNode *psTransformerContainer = CPLCreateXMLNode(
3317 : psTree, CXT_Element,
3318 : CPLSPrintf("%s%s", pszPrefix, psTransformer->pszValue));
3319 :
3320 11 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3321 : }
3322 : }
3323 :
3324 : /* ------------------------------------------------------------- */
3325 : /* Handle geotransforms. */
3326 : /* ------------------------------------------------------------- */
3327 : else
3328 : {
3329 73 : CPLsnprintf(szWork, sizeof(szWork),
3330 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3331 73 : part.adfGeoTransform[0], part.adfGeoTransform[1],
3332 73 : part.adfGeoTransform[2], part.adfGeoTransform[3],
3333 73 : part.adfGeoTransform[4], part.adfGeoTransform[5]);
3334 73 : CPLCreateXMLElementAndValue(
3335 : psTree, CPLSPrintf("%sGeoTransform", pszPrefix), szWork);
3336 :
3337 73 : CPLsnprintf(szWork, sizeof(szWork),
3338 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3339 73 : part.adfInvGeoTransform[0], part.adfInvGeoTransform[1],
3340 73 : part.adfInvGeoTransform[2], part.adfInvGeoTransform[3],
3341 73 : part.adfInvGeoTransform[4], part.adfInvGeoTransform[5]);
3342 73 : CPLCreateXMLElementAndValue(
3343 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix), szWork);
3344 : }
3345 84 : };
3346 :
3347 42 : SerializePart("Src", psInfo->sSrcParams);
3348 42 : SerializePart("Dst", psInfo->sDstParams);
3349 :
3350 : /* -------------------------------------------------------------------- */
3351 : /* Do we have a reprojection transformer? */
3352 : /* -------------------------------------------------------------------- */
3353 42 : if (psInfo->pReprojectArg != nullptr)
3354 : {
3355 :
3356 : CPLXMLNode *psTransformerContainer =
3357 15 : CPLCreateXMLNode(psTree, CXT_Element, "ReprojectTransformer");
3358 :
3359 : CPLXMLNode *psTransformer =
3360 15 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
3361 15 : if (psTransformer != nullptr)
3362 15 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3363 : }
3364 :
3365 42 : return psTree;
3366 : }
3367 :
3368 : /************************************************************************/
3369 : /* GDALDeserializeGeoTransform() */
3370 : /************************************************************************/
3371 :
3372 537 : static void GDALDeserializeGeoTransform(const char *pszGT,
3373 : double adfGeoTransform[6])
3374 : {
3375 537 : CPLsscanf(pszGT, "%lf,%lf,%lf,%lf,%lf,%lf", adfGeoTransform + 0,
3376 : adfGeoTransform + 1, adfGeoTransform + 2, adfGeoTransform + 3,
3377 : adfGeoTransform + 4, adfGeoTransform + 5);
3378 537 : }
3379 :
3380 : /************************************************************************/
3381 : /* GDALDeserializeGenImgProjTransformer() */
3382 : /************************************************************************/
3383 :
3384 147 : void *GDALDeserializeGenImgProjTransformer(CPLXMLNode *psTree)
3385 :
3386 : {
3387 : /* -------------------------------------------------------------------- */
3388 : /* Initialize the transform info. */
3389 : /* -------------------------------------------------------------------- */
3390 : GDALGenImgProjTransformInfo *psInfo =
3391 147 : GDALCreateGenImgProjTransformerInternal();
3392 :
3393 : const auto DeserializePart =
3394 882 : [psTree](const char *pszPrefix, GDALGenImgProjTransformPart &part)
3395 : {
3396 : /* ----------------------------------------------------------------- */
3397 : /* Geotransform */
3398 : /* ----------------------------------------------------------------- */
3399 294 : if (const auto psGTNode =
3400 294 : CPLGetXMLNode(psTree, CPLSPrintf("%sGeoTransform", pszPrefix)))
3401 : {
3402 281 : GDALDeserializeGeoTransform(CPLGetXMLValue(psGTNode, "", ""),
3403 281 : part.adfGeoTransform);
3404 :
3405 281 : if (const auto psInvGTNode = CPLGetXMLNode(
3406 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix)))
3407 : {
3408 256 : GDALDeserializeGeoTransform(CPLGetXMLValue(psInvGTNode, "", ""),
3409 256 : part.adfInvGeoTransform);
3410 : }
3411 : else
3412 : {
3413 25 : if (!GDALInvGeoTransform(part.adfGeoTransform,
3414 25 : part.adfInvGeoTransform))
3415 : {
3416 0 : CPLError(CE_Failure, CPLE_AppDefined,
3417 : "Cannot invert geotransform");
3418 : }
3419 : }
3420 : }
3421 :
3422 : /* ---------------------------------------------------------------- */
3423 : /* Transform */
3424 : /* ---------------------------------------------------------------- */
3425 : else
3426 : {
3427 13 : for (CPLXMLNode *psIter = psTree->psChild; psIter != nullptr;
3428 0 : psIter = psIter->psNext)
3429 : {
3430 13 : if (psIter->eType == CXT_Element &&
3431 13 : STARTS_WITH_CI(psIter->pszValue, pszPrefix))
3432 : {
3433 13 : GDALDeserializeTransformer(psIter->psChild,
3434 : &part.pTransformer,
3435 : &part.pTransformArg);
3436 13 : break;
3437 : }
3438 : }
3439 : }
3440 441 : };
3441 :
3442 147 : DeserializePart("Src", psInfo->sSrcParams);
3443 147 : DeserializePart("Dst", psInfo->sDstParams);
3444 :
3445 : /* -------------------------------------------------------------------- */
3446 : /* Reproject transformer */
3447 : /* -------------------------------------------------------------------- */
3448 147 : CPLXMLNode *psSubtree = CPLGetXMLNode(psTree, "ReprojectTransformer");
3449 147 : if (psSubtree != nullptr && psSubtree->psChild != nullptr)
3450 : {
3451 46 : GDALDeserializeTransformer(psSubtree->psChild, &psInfo->pReproject,
3452 : &psInfo->pReprojectArg);
3453 : }
3454 :
3455 147 : return psInfo;
3456 : }
3457 :
3458 : /************************************************************************/
3459 : /* GDALCreateReprojectionTransformer() */
3460 : /************************************************************************/
3461 :
3462 : /**
3463 : * Create reprojection transformer.
3464 : *
3465 : * Creates a callback data structure suitable for use with
3466 : * GDALReprojectionTransformation() to represent a transformation from
3467 : * one geographic or projected coordinate system to another. On input
3468 : * the coordinate systems are described in OpenGIS WKT format.
3469 : *
3470 : * Internally the OGRCoordinateTransformation object is used to implement
3471 : * the reprojection.
3472 : *
3473 : * @param pszSrcWKT the coordinate system for the source coordinate system.
3474 : * @param pszDstWKT the coordinate system for the destination coordinate
3475 : * system.
3476 : *
3477 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3478 : * system fails to initialize the reprojection.
3479 : **/
3480 :
3481 0 : void *GDALCreateReprojectionTransformer(const char *pszSrcWKT,
3482 : const char *pszDstWKT)
3483 :
3484 : {
3485 : /* -------------------------------------------------------------------- */
3486 : /* Ingest the SRS definitions. */
3487 : /* -------------------------------------------------------------------- */
3488 0 : OGRSpatialReference oSrcSRS;
3489 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3490 0 : if (oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
3491 : {
3492 0 : CPLError(CE_Failure, CPLE_AppDefined,
3493 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3494 0 : return nullptr;
3495 : }
3496 :
3497 0 : OGRSpatialReference oDstSRS;
3498 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3499 0 : if (oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
3500 : {
3501 0 : CPLError(CE_Failure, CPLE_AppDefined,
3502 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3503 0 : return nullptr;
3504 : }
3505 :
3506 0 : return GDALCreateReprojectionTransformerEx(
3507 : OGRSpatialReference::ToHandle(&oSrcSRS),
3508 0 : OGRSpatialReference::ToHandle(&oDstSRS), nullptr);
3509 : }
3510 :
3511 : /************************************************************************/
3512 : /* GDALCreateReprojectionTransformerEx() */
3513 : /************************************************************************/
3514 :
3515 : /**
3516 : * Create reprojection transformer.
3517 : *
3518 : * Creates a callback data structure suitable for use with
3519 : * GDALReprojectionTransformation() to represent a transformation from
3520 : * one geographic or projected coordinate system to another.
3521 : *
3522 : * Internally the OGRCoordinateTransformation object is used to implement
3523 : * the reprojection.
3524 : *
3525 : * @param hSrcSRS the coordinate system for the source coordinate system.
3526 : * @param hDstSRS the coordinate system for the destination coordinate
3527 : * system.
3528 : * @param papszOptions NULL-terminated list of options, or NULL. Currently
3529 : * supported options are:
3530 : * <ul>
3531 : * <li>AREA_OF_INTEREST=west_long,south_lat,east_long,north_lat: Values in
3532 : * degrees. longitudes in [-180,180], latitudes in [-90,90].</li>
3533 : * <li>COORDINATE_OPERATION=string: PROJ or WKT string representing a
3534 : * coordinate operation, overriding the default computed transformation.</li>
3535 : * <li>COORDINATE_EPOCH=decimal_year: Coordinate epoch, expressed as a
3536 : * decimal year. Useful for time-dependent coordinate operations.</li>
3537 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
3538 : * expressed as a decimal year. Useful for time-dependent coordinate
3539 : *operations.</li>
3540 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch
3541 : *of target CRS, expressed as a decimal year. Useful for time-dependent
3542 : *coordinate operations.</li>
3543 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
3544 : * operations are allowed. Defaults to YES.</li>
3545 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
3546 : * PROJ 9.x series), PROJ may use coordinate
3547 : * operations that are not the "best" if resources (typically grids) needed
3548 : * to use them are missing. It will then fallback to other coordinate operations
3549 : * that have a lesser accuracy, for example using Helmert transformations,
3550 : * or in the absence of such operations, to ones with potential very rough
3551 : * accuracy, using "ballpark" transformations
3552 : * (see https://proj.org/glossary.html).
3553 : * When calling this method with YES, PROJ will only consider the
3554 : * "best" operation, and error out (at Transform() time) if they cannot be
3555 : * used.
3556 : * This method may be used together with ALLOW_BALLPARK=NO to
3557 : * only allow best operations that have a known accuracy.
3558 : * Note that this method has no effect on PROJ versions before 9.2.
3559 : * The default value for this option can be also set with the
3560 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
3561 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
3562 : * </ul>
3563 : *
3564 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3565 : * system fails to initialize the reprojection.
3566 : *
3567 : * @since GDAL 3.0
3568 : **/
3569 :
3570 1284 : void *GDALCreateReprojectionTransformerEx(OGRSpatialReferenceH hSrcSRS,
3571 : OGRSpatialReferenceH hDstSRS,
3572 : const char *const *papszOptions)
3573 : {
3574 1284 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
3575 1284 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
3576 :
3577 : /* -------------------------------------------------------------------- */
3578 : /* Build the forward coordinate transformation. */
3579 : /* -------------------------------------------------------------------- */
3580 1284 : double dfWestLongitudeDeg = 0.0;
3581 1284 : double dfSouthLatitudeDeg = 0.0;
3582 1284 : double dfEastLongitudeDeg = 0.0;
3583 1284 : double dfNorthLatitudeDeg = 0.0;
3584 1284 : const char *pszBBOX = CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST");
3585 1284 : if (pszBBOX)
3586 : {
3587 1213 : char **papszTokens = CSLTokenizeString2(pszBBOX, ",", 0);
3588 1213 : if (CSLCount(papszTokens) == 4)
3589 : {
3590 1213 : dfWestLongitudeDeg = CPLAtof(papszTokens[0]);
3591 1213 : dfSouthLatitudeDeg = CPLAtof(papszTokens[1]);
3592 1213 : dfEastLongitudeDeg = CPLAtof(papszTokens[2]);
3593 1213 : dfNorthLatitudeDeg = CPLAtof(papszTokens[3]);
3594 : }
3595 1213 : CSLDestroy(papszTokens);
3596 : }
3597 1284 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
3598 :
3599 2568 : OGRCoordinateTransformationOptions optionsFwd;
3600 1284 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
3601 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
3602 : {
3603 1213 : optionsFwd.SetAreaOfInterest(dfWestLongitudeDeg, dfSouthLatitudeDeg,
3604 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
3605 : }
3606 1284 : if (pszCO)
3607 : {
3608 7 : optionsFwd.SetCoordinateOperation(pszCO, false);
3609 : }
3610 :
3611 1284 : const char *pszCENTER_LONG = CSLFetchNameValue(papszOptions, "CENTER_LONG");
3612 1284 : if (pszCENTER_LONG)
3613 : {
3614 875 : optionsFwd.SetSourceCenterLong(CPLAtof(pszCENTER_LONG));
3615 : }
3616 :
3617 1284 : optionsFwd.SetBallparkAllowed(CPLTestBool(
3618 : CSLFetchNameValueDef(papszOptions, "ALLOW_BALLPARK", "YES")));
3619 :
3620 : const char *pszOnlyBest =
3621 1284 : CSLFetchNameValueDef(papszOptions, "ONLY_BEST", "AUTO");
3622 1284 : if (!EQUAL(pszOnlyBest, "AUTO"))
3623 : {
3624 1 : optionsFwd.SetOnlyBest(CPLTestBool(pszOnlyBest));
3625 : }
3626 :
3627 : OGRCoordinateTransformation *poForwardTransform =
3628 1284 : OGRCreateCoordinateTransformation(poSrcSRS, poDstSRS, optionsFwd);
3629 :
3630 1284 : if (poForwardTransform == nullptr)
3631 : // OGRCreateCoordinateTransformation() will report errors on its own.
3632 6 : return nullptr;
3633 :
3634 1278 : poForwardTransform->SetEmitErrors(false);
3635 :
3636 : /* -------------------------------------------------------------------- */
3637 : /* Create a structure to hold the transform info, and also */
3638 : /* build reverse transform. We assume that if the forward */
3639 : /* transform can be created, then so can the reverse one. */
3640 : /* -------------------------------------------------------------------- */
3641 1278 : GDALReprojectionTransformInfo *psInfo = new GDALReprojectionTransformInfo();
3642 :
3643 1278 : psInfo->papszOptions = CSLDuplicate(papszOptions);
3644 1278 : psInfo->poForwardTransform = poForwardTransform;
3645 1278 : psInfo->dfTime = CPLAtof(CSLFetchNameValueDef(
3646 : papszOptions, "COORDINATE_EPOCH",
3647 : CSLFetchNameValueDef(
3648 : papszOptions, "DST_COORDINATE_EPOCH",
3649 : CSLFetchNameValueDef(papszOptions, "SRC_COORDINATE_EPOCH", "0"))));
3650 1278 : psInfo->poReverseTransform = poForwardTransform->GetInverse();
3651 :
3652 1278 : if (psInfo->poReverseTransform)
3653 1278 : psInfo->poReverseTransform->SetEmitErrors(false);
3654 :
3655 1278 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
3656 : strlen(GDAL_GTI2_SIGNATURE));
3657 1278 : psInfo->sTI.pszClassName = GDAL_REPROJECTION_TRANSFORMER_CLASS_NAME;
3658 1278 : psInfo->sTI.pfnTransform = GDALReprojectionTransform;
3659 1278 : psInfo->sTI.pfnCleanup = GDALDestroyReprojectionTransformer;
3660 1278 : psInfo->sTI.pfnSerialize = GDALSerializeReprojectionTransformer;
3661 :
3662 1278 : return psInfo;
3663 : }
3664 :
3665 : /************************************************************************/
3666 : /* GDALDestroyReprojectionTransformer() */
3667 : /************************************************************************/
3668 :
3669 : /**
3670 : * Destroy reprojection transformation.
3671 : *
3672 : * @param pTransformArg the transformation handle returned by
3673 : * GDALCreateReprojectionTransformer().
3674 : */
3675 :
3676 1278 : void GDALDestroyReprojectionTransformer(void *pTransformArg)
3677 :
3678 : {
3679 1278 : if (pTransformArg == nullptr)
3680 0 : return;
3681 :
3682 1278 : GDALReprojectionTransformInfo *psInfo =
3683 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3684 :
3685 1278 : if (psInfo->poForwardTransform)
3686 1278 : OGRCoordinateTransformation::DestroyCT(psInfo->poForwardTransform);
3687 :
3688 1278 : if (psInfo->poReverseTransform)
3689 1278 : OGRCoordinateTransformation::DestroyCT(psInfo->poReverseTransform);
3690 :
3691 1278 : CSLDestroy(psInfo->papszOptions);
3692 :
3693 1278 : delete psInfo;
3694 : }
3695 :
3696 : /************************************************************************/
3697 : /* GDALReprojectionTransform() */
3698 : /************************************************************************/
3699 :
3700 : /**
3701 : * Perform reprojection transformation.
3702 : *
3703 : * Actually performs the reprojection transformation described in
3704 : * GDALCreateReprojectionTransformer(). This function matches the
3705 : * GDALTransformerFunc() signature. Details of the arguments are described
3706 : * there.
3707 : */
3708 :
3709 8469090 : int GDALReprojectionTransform(void *pTransformArg, int bDstToSrc,
3710 : int nPointCount, double *padfX, double *padfY,
3711 : double *padfZ, int *panSuccess)
3712 :
3713 : {
3714 8469090 : GDALReprojectionTransformInfo *psInfo =
3715 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3716 : int bSuccess;
3717 :
3718 8469090 : std::vector<double> adfTime;
3719 8469090 : double *padfT = nullptr;
3720 8469090 : if (psInfo->dfTime != 0.0 && nPointCount > 0)
3721 : {
3722 1 : adfTime.resize(nPointCount, psInfo->dfTime);
3723 1 : padfT = &adfTime[0];
3724 : }
3725 :
3726 8469090 : if (bDstToSrc)
3727 : {
3728 8193060 : if (psInfo->poReverseTransform == nullptr)
3729 : {
3730 0 : CPLError(
3731 : CE_Failure, CPLE_AppDefined,
3732 : "Inverse coordinate transformation cannot be instantiated");
3733 0 : if (panSuccess)
3734 : {
3735 0 : for (int i = 0; i < nPointCount; i++)
3736 0 : panSuccess[i] = FALSE;
3737 : }
3738 0 : bSuccess = false;
3739 : }
3740 : else
3741 : {
3742 8193060 : bSuccess = psInfo->poReverseTransform->Transform(
3743 8193060 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3744 : }
3745 : }
3746 : else
3747 276025 : bSuccess = psInfo->poForwardTransform->Transform(
3748 276025 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3749 :
3750 16938200 : return bSuccess;
3751 : }
3752 :
3753 : /************************************************************************/
3754 : /* GDALSerializeReprojectionTransformer() */
3755 : /************************************************************************/
3756 :
3757 122 : static CPLXMLNode *GDALSerializeReprojectionTransformer(void *pTransformArg)
3758 :
3759 : {
3760 : CPLXMLNode *psTree;
3761 122 : GDALReprojectionTransformInfo *psInfo =
3762 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3763 :
3764 122 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ReprojectionTransformer");
3765 :
3766 : /* -------------------------------------------------------------------- */
3767 : /* Handle SourceCS. */
3768 : /* -------------------------------------------------------------------- */
3769 244 : const auto ExportToWkt = [](const OGRSpatialReference *poSRS)
3770 : {
3771 : // Try first in WKT1 for backward compat
3772 : {
3773 244 : char *pszWKT = nullptr;
3774 244 : const char *const apszOptions[] = {"FORMAT=WKT1", nullptr};
3775 244 : CPLErrorHandlerPusher oHandler(CPLQuietErrorHandler);
3776 244 : CPLErrorStateBackuper oBackuper;
3777 244 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3778 : {
3779 486 : std::string osRet(pszWKT);
3780 243 : CPLFree(pszWKT);
3781 243 : return osRet;
3782 : }
3783 1 : CPLFree(pszWKT);
3784 : }
3785 :
3786 1 : char *pszWKT = nullptr;
3787 1 : const char *const apszOptions[] = {"FORMAT=WKT2_2019", nullptr};
3788 1 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3789 : {
3790 2 : std::string osRet(pszWKT);
3791 1 : CPLFree(pszWKT);
3792 1 : return osRet;
3793 : }
3794 0 : CPLFree(pszWKT);
3795 0 : return std::string();
3796 : };
3797 :
3798 122 : auto poSRS = psInfo->poForwardTransform->GetSourceCS();
3799 122 : if (poSRS)
3800 : {
3801 244 : const auto osWKT = ExportToWkt(poSRS);
3802 122 : CPLCreateXMLElementAndValue(psTree, "SourceSRS", osWKT.c_str());
3803 : }
3804 :
3805 : /* -------------------------------------------------------------------- */
3806 : /* Handle DestinationCS. */
3807 : /* -------------------------------------------------------------------- */
3808 122 : poSRS = psInfo->poForwardTransform->GetTargetCS();
3809 122 : if (poSRS)
3810 : {
3811 244 : const auto osWKT = ExportToWkt(poSRS);
3812 122 : CPLCreateXMLElementAndValue(psTree, "TargetSRS", osWKT.c_str());
3813 : }
3814 :
3815 : /* -------------------------------------------------------------------- */
3816 : /* Serialize options. */
3817 : /* -------------------------------------------------------------------- */
3818 122 : if (psInfo->papszOptions)
3819 : {
3820 : CPLXMLNode *psOptions =
3821 108 : CPLCreateXMLNode(psTree, CXT_Element, "Options");
3822 260 : for (auto iter = psInfo->papszOptions; *iter != nullptr; ++iter)
3823 : {
3824 152 : char *pszKey = nullptr;
3825 152 : const char *pszValue = CPLParseNameValue(*iter, &pszKey);
3826 152 : if (pszKey && pszValue)
3827 : {
3828 : auto elt =
3829 152 : CPLCreateXMLElementAndValue(psOptions, "Option", pszValue);
3830 152 : CPLAddXMLAttributeAndValue(elt, "key", pszKey);
3831 : }
3832 152 : CPLFree(pszKey);
3833 : }
3834 : }
3835 :
3836 122 : return psTree;
3837 : }
3838 :
3839 : /************************************************************************/
3840 : /* GDALDeserializeReprojectionTransformer() */
3841 : /************************************************************************/
3842 :
3843 153 : static void *GDALDeserializeReprojectionTransformer(CPLXMLNode *psTree)
3844 :
3845 : {
3846 153 : const char *pszSourceSRS = CPLGetXMLValue(psTree, "SourceSRS", nullptr);
3847 153 : const char *pszTargetSRS = CPLGetXMLValue(psTree, "TargetSRS", nullptr);
3848 153 : char *pszSourceWKT = nullptr, *pszTargetWKT = nullptr;
3849 153 : void *pResult = nullptr;
3850 :
3851 306 : OGRSpatialReference oSrcSRS;
3852 306 : OGRSpatialReference oDstSRS;
3853 :
3854 153 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3855 153 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3856 153 : if (pszSourceSRS != nullptr)
3857 : {
3858 153 : oSrcSRS.SetFromUserInput(pszSourceSRS);
3859 : }
3860 :
3861 153 : if (pszTargetSRS != nullptr)
3862 : {
3863 153 : oDstSRS.SetFromUserInput(pszTargetSRS);
3864 : }
3865 :
3866 153 : CPLStringList aosList;
3867 153 : const CPLXMLNode *psOptions = CPLGetXMLNode(psTree, "Options");
3868 153 : if (psOptions)
3869 : {
3870 285 : for (auto iter = psOptions->psChild; iter; iter = iter->psNext)
3871 : {
3872 168 : if (iter->eType == CXT_Element &&
3873 168 : strcmp(iter->pszValue, "Option") == 0)
3874 : {
3875 168 : const char *pszKey = CPLGetXMLValue(iter, "key", nullptr);
3876 168 : const char *pszValue = CPLGetXMLValue(iter, nullptr, nullptr);
3877 168 : if (pszKey && pszValue)
3878 : {
3879 168 : aosList.SetNameValue(pszKey, pszValue);
3880 : }
3881 : }
3882 : }
3883 : }
3884 :
3885 153 : pResult = GDALCreateReprojectionTransformerEx(
3886 153 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS) : nullptr,
3887 153 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS) : nullptr,
3888 153 : aosList.List());
3889 :
3890 153 : CPLFree(pszSourceWKT);
3891 153 : CPLFree(pszTargetWKT);
3892 :
3893 306 : return pResult;
3894 : }
3895 :
3896 : /************************************************************************/
3897 : /* ==================================================================== */
3898 : /* Approximate transformer. */
3899 : /* ==================================================================== */
3900 : /************************************************************************/
3901 :
3902 : /************************************************************************/
3903 : /* GDALCreateSimilarApproxTransformer() */
3904 : /************************************************************************/
3905 :
3906 42 : static void *GDALCreateSimilarApproxTransformer(void *hTransformArg,
3907 : double dfSrcRatioX,
3908 : double dfSrcRatioY)
3909 : {
3910 42 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarApproxTransformer",
3911 : nullptr);
3912 :
3913 42 : GDALApproxTransformInfo *psInfo =
3914 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
3915 :
3916 42 : void *pBaseCBData = GDALCreateSimilarTransformer(psInfo->pBaseCBData,
3917 : dfSrcRatioX, dfSrcRatioY);
3918 42 : if (pBaseCBData == nullptr)
3919 : {
3920 0 : return nullptr;
3921 : }
3922 :
3923 : GDALApproxTransformInfo *psClonedInfo =
3924 42 : static_cast<GDALApproxTransformInfo *>(GDALCreateApproxTransformer2(
3925 : psInfo->pfnBaseTransformer, pBaseCBData, psInfo->dfMaxErrorForward,
3926 : psInfo->dfMaxErrorReverse));
3927 42 : psClonedInfo->bOwnSubtransformer = TRUE;
3928 :
3929 42 : return psClonedInfo;
3930 : }
3931 :
3932 : /************************************************************************/
3933 : /* GDALSerializeApproxTransformer() */
3934 : /************************************************************************/
3935 :
3936 27 : static CPLXMLNode *GDALSerializeApproxTransformer(void *pTransformArg)
3937 :
3938 : {
3939 : CPLXMLNode *psTree;
3940 27 : GDALApproxTransformInfo *psInfo =
3941 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
3942 :
3943 27 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ApproxTransformer");
3944 :
3945 : /* -------------------------------------------------------------------- */
3946 : /* Attach max error. */
3947 : /* -------------------------------------------------------------------- */
3948 27 : if (psInfo->dfMaxErrorForward == psInfo->dfMaxErrorReverse)
3949 : {
3950 25 : CPLCreateXMLElementAndValue(
3951 : psTree, "MaxError",
3952 50 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3953 : }
3954 : else
3955 : {
3956 2 : CPLCreateXMLElementAndValue(
3957 : psTree, "MaxErrorForward",
3958 4 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3959 2 : CPLCreateXMLElementAndValue(
3960 : psTree, "MaxErrorReverse",
3961 4 : CPLString().Printf("%g", psInfo->dfMaxErrorReverse));
3962 : }
3963 :
3964 : /* -------------------------------------------------------------------- */
3965 : /* Capture underlying transformer. */
3966 : /* -------------------------------------------------------------------- */
3967 : CPLXMLNode *psTransformerContainer =
3968 27 : CPLCreateXMLNode(psTree, CXT_Element, "BaseTransformer");
3969 :
3970 27 : CPLXMLNode *psTransformer = GDALSerializeTransformer(
3971 : psInfo->pfnBaseTransformer, psInfo->pBaseCBData);
3972 27 : if (psTransformer != nullptr)
3973 27 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3974 :
3975 27 : return psTree;
3976 : }
3977 :
3978 : /************************************************************************/
3979 : /* GDALCreateApproxTransformer() */
3980 : /************************************************************************/
3981 :
3982 : /**
3983 : * Create an approximating transformer.
3984 : *
3985 : * This function creates a context for an approximated transformer. Basically
3986 : * a high precision transformer is supplied as input and internally linear
3987 : * approximations are computed to generate results to within a defined
3988 : * precision.
3989 : *
3990 : * The approximation is actually done at the point where GDALApproxTransform()
3991 : * calls are made, and depend on the assumption that they are roughly linear.
3992 : * The first and last point passed in must be the extreme values and the
3993 : * intermediate values should describe a curve between the end points. The
3994 : * approximator transforms and centers using the approximate transformer, and
3995 : * then compares the true middle transformed value to a linear approximation
3996 : * based on the end points. If the error is within the supplied threshold then
3997 : * the end points are used to linearly approximate all the values otherwise the
3998 : * input points are split into two smaller sets, and the function is recursively
3999 : * called until a sufficiently small set of points is found that the linear
4000 : * approximation is OK, or that all the points are exactly computed.
4001 : *
4002 : * This function is very suitable for approximating transformation results
4003 : * from output pixel/line space to input coordinates for warpers that operate
4004 : * on one input scanline at a time. Care should be taken using it in other
4005 : * circumstances as little internal validation is done in order to keep things
4006 : * fast.
4007 : *
4008 : * @param pfnBaseTransformer the high precision transformer which should be
4009 : * approximated.
4010 : * @param pBaseTransformArg the callback argument for the high precision
4011 : * transformer.
4012 : * @param dfMaxError the maximum cartesian error in the "output" space that
4013 : * is to be accepted in the linear approximation, evaluated as a Manhattan
4014 : * distance.
4015 : *
4016 : * @return callback pointer suitable for use with GDALApproxTransform(). It
4017 : * should be deallocated with GDALDestroyApproxTransformer().
4018 : */
4019 :
4020 1382 : void *GDALCreateApproxTransformer(GDALTransformerFunc pfnBaseTransformer,
4021 : void *pBaseTransformArg, double dfMaxError)
4022 :
4023 : {
4024 1382 : return GDALCreateApproxTransformer2(pfnBaseTransformer, pBaseTransformArg,
4025 1382 : dfMaxError, dfMaxError);
4026 : }
4027 :
4028 : static void *
4029 1533 : GDALCreateApproxTransformer2(GDALTransformerFunc pfnBaseTransformer,
4030 : void *pBaseTransformArg, double dfMaxErrorForward,
4031 : double dfMaxErrorReverse)
4032 :
4033 : {
4034 1533 : GDALApproxTransformInfo *psATInfo = new GDALApproxTransformInfo;
4035 1533 : psATInfo->pfnBaseTransformer = pfnBaseTransformer;
4036 1533 : psATInfo->pBaseCBData = pBaseTransformArg;
4037 1533 : psATInfo->dfMaxErrorForward = dfMaxErrorForward;
4038 1533 : psATInfo->dfMaxErrorReverse = dfMaxErrorReverse;
4039 1533 : psATInfo->bOwnSubtransformer = FALSE;
4040 :
4041 1533 : memcpy(psATInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
4042 : strlen(GDAL_GTI2_SIGNATURE));
4043 1533 : psATInfo->sTI.pszClassName = GDAL_APPROX_TRANSFORMER_CLASS_NAME;
4044 1533 : psATInfo->sTI.pfnTransform = GDALApproxTransform;
4045 1533 : psATInfo->sTI.pfnCleanup = GDALDestroyApproxTransformer;
4046 1533 : psATInfo->sTI.pfnSerialize = GDALSerializeApproxTransformer;
4047 1533 : psATInfo->sTI.pfnCreateSimilar = GDALCreateSimilarApproxTransformer;
4048 :
4049 1533 : return psATInfo;
4050 : }
4051 :
4052 : /************************************************************************/
4053 : /* GDALApproxTransformerOwnsSubtransformer() */
4054 : /************************************************************************/
4055 :
4056 : /** Set bOwnSubtransformer flag */
4057 1488 : void GDALApproxTransformerOwnsSubtransformer(void *pCBData, int bOwnFlag)
4058 :
4059 : {
4060 1488 : GDALApproxTransformInfo *psATInfo =
4061 : static_cast<GDALApproxTransformInfo *>(pCBData);
4062 :
4063 1488 : psATInfo->bOwnSubtransformer = bOwnFlag;
4064 1488 : }
4065 :
4066 : /************************************************************************/
4067 : /* GDALDestroyApproxTransformer() */
4068 : /************************************************************************/
4069 :
4070 : /**
4071 : * Cleanup approximate transformer.
4072 : *
4073 : * Deallocates the resources allocated by GDALCreateApproxTransformer().
4074 : *
4075 : * @param pCBData callback data originally returned by
4076 : * GDALCreateApproxTransformer().
4077 : */
4078 :
4079 1533 : void GDALDestroyApproxTransformer(void *pCBData)
4080 :
4081 : {
4082 1533 : if (pCBData == nullptr)
4083 0 : return;
4084 :
4085 1533 : GDALApproxTransformInfo *psATInfo =
4086 : static_cast<GDALApproxTransformInfo *>(pCBData);
4087 :
4088 1533 : if (psATInfo->bOwnSubtransformer)
4089 1530 : GDALDestroyTransformer(psATInfo->pBaseCBData);
4090 :
4091 1533 : delete psATInfo;
4092 : }
4093 :
4094 : /************************************************************************/
4095 : /* GDALRefreshApproxTransformer() */
4096 : /************************************************************************/
4097 :
4098 46 : void GDALRefreshApproxTransformer(void *hTransformArg)
4099 : {
4100 46 : GDALApproxTransformInfo *psInfo =
4101 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4102 :
4103 46 : if (GDALIsTransformer(psInfo->pBaseCBData,
4104 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4105 : {
4106 46 : GDALRefreshGenImgProjTransformer(psInfo->pBaseCBData);
4107 : }
4108 46 : }
4109 :
4110 : /************************************************************************/
4111 : /* GDALApproxTransformInternal() */
4112 : /************************************************************************/
4113 :
4114 1517910 : static int GDALApproxTransformInternal(void *pCBData, int bDstToSrc,
4115 : int nPoints, double *x, double *y,
4116 : double *z, int *panSuccess,
4117 : // SME = Start, Middle, End.
4118 : const double xSMETransformed[3],
4119 : const double ySMETransformed[3],
4120 : const double zSMETransformed[3])
4121 : {
4122 1517910 : GDALApproxTransformInfo *psATInfo =
4123 : static_cast<GDALApproxTransformInfo *>(pCBData);
4124 1517910 : const int nMiddle = (nPoints - 1) / 2;
4125 :
4126 : #ifdef notdef_sanify_check
4127 : {
4128 : double x2[3] = {x[0], x[nMiddle], x[nPoints - 1]};
4129 : double y2[3] = {y[0], y[nMiddle], y[nPoints - 1]};
4130 : double z2[3] = {z[0], z[nMiddle], z[nPoints - 1]};
4131 : int anSuccess2[3] = {};
4132 :
4133 : const int bSuccess = psATInfo->pfnBaseTransformer(
4134 : psATInfo->pBaseCBData, bDstToSrc, 3, x2, y2, z2, anSuccess2);
4135 : CPLAssert(bSuccess);
4136 : CPLAssert(anSuccess2[0]);
4137 : CPLAssert(anSuccess2[1]);
4138 : CPLAssert(anSuccess2[2]);
4139 : CPLAssert(x2[0] == xSMETransformed[0]);
4140 : CPLAssert(y2[0] == ySMETransformed[0]);
4141 : CPLAssert(z2[0] == zSMETransformed[0]);
4142 : CPLAssert(x2[1] == xSMETransformed[1]);
4143 : CPLAssert(y2[1] == ySMETransformed[1]);
4144 : CPLAssert(z2[1] == zSMETransformed[1]);
4145 : CPLAssert(x2[2] == xSMETransformed[2]);
4146 : CPLAssert(y2[2] == ySMETransformed[2]);
4147 : CPLAssert(z2[2] == zSMETransformed[2]);
4148 : }
4149 : #endif
4150 :
4151 : #ifdef DEBUG_APPROX_TRANSFORMER
4152 : fprintf(stderr, "start (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4153 : x[0], y[0], xSMETransformed[0], ySMETransformed[0]);
4154 : fprintf(stderr, "middle (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4155 : x[nMiddle], y[nMiddle], xSMETransformed[1], ySMETransformed[1]);
4156 : fprintf(stderr, "end (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4157 : x[nPoints - 1], y[nPoints - 1], xSMETransformed[2],
4158 : ySMETransformed[2]);
4159 : #endif
4160 :
4161 : /* -------------------------------------------------------------------- */
4162 : /* Is the error at the middle acceptable relative to an */
4163 : /* interpolation of the middle position? */
4164 : /* -------------------------------------------------------------------- */
4165 1517910 : const double dfDeltaX =
4166 1517910 : (xSMETransformed[2] - xSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4167 1517910 : const double dfDeltaY =
4168 1517910 : (ySMETransformed[2] - ySMETransformed[0]) / (x[nPoints - 1] - x[0]);
4169 1517910 : const double dfDeltaZ =
4170 1517910 : (zSMETransformed[2] - zSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4171 :
4172 1517910 : const double dfError =
4173 1517910 : fabs((xSMETransformed[0] + dfDeltaX * (x[nMiddle] - x[0])) -
4174 1517910 : xSMETransformed[1]) +
4175 1517910 : fabs((ySMETransformed[0] + dfDeltaY * (x[nMiddle] - x[0])) -
4176 1517910 : ySMETransformed[1]);
4177 :
4178 1517910 : const double dfMaxError =
4179 1517910 : (bDstToSrc) ? psATInfo->dfMaxErrorReverse : psATInfo->dfMaxErrorForward;
4180 1517910 : if (dfError > dfMaxError)
4181 : {
4182 : #if DEBUG_VERBOSE
4183 : CPLDebug("GDAL",
4184 : "ApproxTransformer - "
4185 : "error %g over threshold %g, subdivide %d points.",
4186 : dfError, dfMaxError, nPoints);
4187 : #endif
4188 :
4189 656578 : double xMiddle[3] = {x[(nMiddle - 1) / 2], x[nMiddle - 1],
4190 656578 : x[nMiddle + (nPoints - nMiddle - 1) / 2]};
4191 656578 : double yMiddle[3] = {y[(nMiddle - 1) / 2], y[nMiddle - 1],
4192 656578 : y[nMiddle + (nPoints - nMiddle - 1) / 2]};
4193 656578 : double zMiddle[3] = {z[(nMiddle - 1) / 2], z[nMiddle - 1],
4194 656578 : z[nMiddle + (nPoints - nMiddle - 1) / 2]};
4195 :
4196 656578 : const bool bUseBaseTransformForHalf1 =
4197 525184 : nMiddle <= 5 || y[0] != y[nMiddle - 1] ||
4198 1706950 : y[0] != y[(nMiddle - 1) / 2] || x[0] == x[nMiddle - 1] ||
4199 525184 : x[0] == x[(nMiddle - 1) / 2];
4200 656578 : const bool bUseBaseTransformForHalf2 =
4201 539319 : nPoints - nMiddle <= 5 || y[nMiddle] != y[nPoints - 1] ||
4202 539319 : y[nMiddle] != y[nMiddle + (nPoints - nMiddle - 1) / 2] ||
4203 1735220 : x[nMiddle] == x[nPoints - 1] ||
4204 539319 : x[nMiddle] == x[nMiddle + (nPoints - nMiddle - 1) / 2];
4205 :
4206 656578 : int anSuccess2[3] = {};
4207 656578 : int bSuccess = FALSE;
4208 656578 : if (!bUseBaseTransformForHalf1 && !bUseBaseTransformForHalf2)
4209 525184 : bSuccess = psATInfo->pfnBaseTransformer(
4210 : psATInfo->pBaseCBData, bDstToSrc, 3, xMiddle, yMiddle, zMiddle,
4211 : anSuccess2);
4212 131394 : else if (!bUseBaseTransformForHalf1)
4213 : {
4214 0 : bSuccess = psATInfo->pfnBaseTransformer(
4215 : psATInfo->pBaseCBData, bDstToSrc, 2, xMiddle, yMiddle, zMiddle,
4216 : anSuccess2);
4217 0 : anSuccess2[2] = TRUE;
4218 : }
4219 131394 : else if (!bUseBaseTransformForHalf2)
4220 : {
4221 14135 : bSuccess = psATInfo->pfnBaseTransformer(
4222 : psATInfo->pBaseCBData, bDstToSrc, 1, xMiddle + 2, yMiddle + 2,
4223 : zMiddle + 2, anSuccess2 + 2);
4224 14135 : anSuccess2[0] = TRUE;
4225 14135 : anSuccess2[1] = TRUE;
4226 : }
4227 :
4228 656578 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4229 : {
4230 117275 : bSuccess = psATInfo->pfnBaseTransformer(
4231 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4232 : z + 1, panSuccess + 1);
4233 234550 : bSuccess &= psATInfo->pfnBaseTransformer(
4234 117275 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4235 117275 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4236 117275 : panSuccess + nMiddle + 1);
4237 :
4238 117275 : x[0] = xSMETransformed[0];
4239 117275 : y[0] = ySMETransformed[0];
4240 117275 : z[0] = zSMETransformed[0];
4241 117275 : panSuccess[0] = TRUE;
4242 117275 : x[nMiddle] = xSMETransformed[1];
4243 117275 : y[nMiddle] = ySMETransformed[1];
4244 117275 : z[nMiddle] = zSMETransformed[1];
4245 117275 : panSuccess[nMiddle] = TRUE;
4246 117275 : x[nPoints - 1] = xSMETransformed[2];
4247 117275 : y[nPoints - 1] = ySMETransformed[2];
4248 117275 : z[nPoints - 1] = zSMETransformed[2];
4249 117275 : panSuccess[nPoints - 1] = TRUE;
4250 117275 : return bSuccess;
4251 : }
4252 :
4253 539303 : double x2[3] = {};
4254 539303 : double y2[3] = {};
4255 539303 : double z2[3] = {};
4256 539303 : if (!bUseBaseTransformForHalf1)
4257 : {
4258 525168 : x2[0] = xSMETransformed[0];
4259 525168 : y2[0] = ySMETransformed[0];
4260 525168 : z2[0] = zSMETransformed[0];
4261 525168 : x2[1] = xMiddle[0];
4262 525168 : y2[1] = yMiddle[0];
4263 525168 : z2[1] = zMiddle[0];
4264 525168 : x2[2] = xMiddle[1];
4265 525168 : y2[2] = yMiddle[1];
4266 525168 : z2[2] = zMiddle[1];
4267 :
4268 525168 : bSuccess = GDALApproxTransformInternal(
4269 : psATInfo, bDstToSrc, nMiddle, x, y, z, panSuccess, x2, y2, z2);
4270 : }
4271 : else
4272 : {
4273 14135 : bSuccess = psATInfo->pfnBaseTransformer(
4274 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4275 : z + 1, panSuccess + 1);
4276 14135 : x[0] = xSMETransformed[0];
4277 14135 : y[0] = ySMETransformed[0];
4278 14135 : z[0] = zSMETransformed[0];
4279 14135 : panSuccess[0] = TRUE;
4280 : }
4281 :
4282 539303 : if (!bSuccess)
4283 24 : return FALSE;
4284 :
4285 539279 : if (!bUseBaseTransformForHalf2)
4286 : {
4287 539279 : x2[0] = xSMETransformed[1];
4288 539279 : y2[0] = ySMETransformed[1];
4289 539279 : z2[0] = zSMETransformed[1];
4290 539279 : x2[1] = xMiddle[2];
4291 539279 : y2[1] = yMiddle[2];
4292 539279 : z2[1] = zMiddle[2];
4293 539279 : x2[2] = xSMETransformed[2];
4294 539279 : y2[2] = ySMETransformed[2];
4295 539279 : z2[2] = zSMETransformed[2];
4296 :
4297 539279 : bSuccess = GDALApproxTransformInternal(
4298 539279 : psATInfo, bDstToSrc, nPoints - nMiddle, x + nMiddle,
4299 539279 : y + nMiddle, z + nMiddle, panSuccess + nMiddle, x2, y2, z2);
4300 : }
4301 : else
4302 : {
4303 0 : bSuccess = psATInfo->pfnBaseTransformer(
4304 0 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4305 0 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4306 0 : panSuccess + nMiddle + 1);
4307 :
4308 0 : x[nMiddle] = xSMETransformed[1];
4309 0 : y[nMiddle] = ySMETransformed[1];
4310 0 : z[nMiddle] = zSMETransformed[1];
4311 0 : panSuccess[nMiddle] = TRUE;
4312 0 : x[nPoints - 1] = xSMETransformed[2];
4313 0 : y[nPoints - 1] = ySMETransformed[2];
4314 0 : z[nPoints - 1] = zSMETransformed[2];
4315 0 : panSuccess[nPoints - 1] = TRUE;
4316 : }
4317 :
4318 539279 : if (!bSuccess)
4319 2 : return FALSE;
4320 :
4321 539277 : return TRUE;
4322 : }
4323 :
4324 : /* -------------------------------------------------------------------- */
4325 : /* Error is OK since this is just used to compute output bounds */
4326 : /* of newly created file for gdalwarper. So just use affine */
4327 : /* approximation of the reverse transform. Eventually we */
4328 : /* should implement iterative searching to find a result within */
4329 : /* our error threshold. */
4330 : /* NOTE: the above comment is not true: gdalwarp uses approximator */
4331 : /* also to compute the source pixel of each target pixel. */
4332 : /* -------------------------------------------------------------------- */
4333 198767000 : for (int i = nPoints - 1; i >= 0; i--)
4334 : {
4335 : #ifdef check_error
4336 : double xtemp = x[i];
4337 : double ytemp = y[i];
4338 : double ztemp = z[i];
4339 : double x_ori = xtemp;
4340 : double y_ori = ytemp;
4341 : int btemp = FALSE;
4342 : psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 1,
4343 : &xtemp, &ytemp, &ztemp, &btemp);
4344 : #endif
4345 197906000 : const double dfDist = (x[i] - x[0]);
4346 197906000 : x[i] = xSMETransformed[0] + dfDeltaX * dfDist;
4347 197906000 : y[i] = ySMETransformed[0] + dfDeltaY * dfDist;
4348 197906000 : z[i] = zSMETransformed[0] + dfDeltaZ * dfDist;
4349 : #ifdef check_error
4350 : const double dfError2 = fabs(x[i] - xtemp) + fabs(y[i] - ytemp);
4351 : if (dfError2 > 4 /*10 * dfMaxError*/)
4352 : {
4353 : /*ok*/ printf("Error = %f on (%f, %f)\n", dfError2, x_ori, y_ori);
4354 : }
4355 : #endif
4356 197906000 : panSuccess[i] = TRUE;
4357 : }
4358 :
4359 861332 : return TRUE;
4360 : }
4361 :
4362 : /************************************************************************/
4363 : /* GDALApproxTransform() */
4364 : /************************************************************************/
4365 :
4366 : /**
4367 : * Perform approximate transformation.
4368 : *
4369 : * Actually performs the approximate transformation described in
4370 : * GDALCreateApproxTransformer(). This function matches the
4371 : * GDALTransformerFunc() signature. Details of the arguments are described
4372 : * there.
4373 : */
4374 :
4375 7294830 : int GDALApproxTransform(void *pCBData, int bDstToSrc, int nPoints, double *x,
4376 : double *y, double *z, int *panSuccess)
4377 :
4378 : {
4379 7294830 : GDALApproxTransformInfo *psATInfo =
4380 : static_cast<GDALApproxTransformInfo *>(pCBData);
4381 7294830 : double x2[3] = {};
4382 7294830 : double y2[3] = {};
4383 7294830 : double z2[3] = {};
4384 7294830 : int anSuccess2[3] = {};
4385 : int bSuccess;
4386 :
4387 7294830 : const int nMiddle = (nPoints - 1) / 2;
4388 :
4389 : /* -------------------------------------------------------------------- */
4390 : /* Bail if our preconditions are not met, or if error is not */
4391 : /* acceptable. */
4392 : /* -------------------------------------------------------------------- */
4393 7294830 : int bRet = FALSE;
4394 7294830 : if (y[0] != y[nPoints - 1] || y[0] != y[nMiddle] ||
4395 7280260 : x[0] == x[nPoints - 1] || x[0] == x[nMiddle] ||
4396 459800 : (psATInfo->dfMaxErrorForward == 0.0 &&
4397 459800 : psATInfo->dfMaxErrorReverse == 0.0) ||
4398 : nPoints <= 5)
4399 : {
4400 6835810 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4401 : nPoints, x, y, z, panSuccess);
4402 6835810 : goto end;
4403 : }
4404 :
4405 : /* -------------------------------------------------------------------- */
4406 : /* Transform first, last and middle point. */
4407 : /* -------------------------------------------------------------------- */
4408 459023 : x2[0] = x[0];
4409 459023 : y2[0] = y[0];
4410 459023 : z2[0] = z[0];
4411 459023 : x2[1] = x[nMiddle];
4412 459023 : y2[1] = y[nMiddle];
4413 459023 : z2[1] = z[nMiddle];
4414 459023 : x2[2] = x[nPoints - 1];
4415 459023 : y2[2] = y[nPoints - 1];
4416 459023 : z2[2] = z[nPoints - 1];
4417 :
4418 459023 : bSuccess = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 3,
4419 : x2, y2, z2, anSuccess2);
4420 459023 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4421 : {
4422 5560 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4423 : nPoints, x, y, z, panSuccess);
4424 5560 : goto end;
4425 : }
4426 :
4427 453463 : bRet = GDALApproxTransformInternal(pCBData, bDstToSrc, nPoints, x, y, z,
4428 : panSuccess, x2, y2, z2);
4429 :
4430 7294830 : end:
4431 : #ifdef DEBUG_APPROX_TRANSFORMER
4432 : for (int i = 0; i < nPoints; i++)
4433 : fprintf(stderr, "[%d] (%.10f,%.10f) %d\n", /*ok*/
4434 : i, x[i], y[i], panSuccess[i]);
4435 : #endif
4436 :
4437 7294830 : return bRet;
4438 : }
4439 :
4440 : /************************************************************************/
4441 : /* GDALDeserializeApproxTransformer() */
4442 : /************************************************************************/
4443 :
4444 107 : static void *GDALDeserializeApproxTransformer(CPLXMLNode *psTree)
4445 :
4446 : {
4447 107 : double dfMaxErrorForward = 0.25;
4448 107 : double dfMaxErrorReverse = 0.25;
4449 107 : const char *pszMaxError = CPLGetXMLValue(psTree, "MaxError", nullptr);
4450 107 : if (pszMaxError != nullptr)
4451 : {
4452 105 : dfMaxErrorForward = CPLAtof(pszMaxError);
4453 105 : dfMaxErrorReverse = dfMaxErrorForward;
4454 : }
4455 : const char *pszMaxErrorForward =
4456 107 : CPLGetXMLValue(psTree, "MaxErrorForward", nullptr);
4457 107 : if (pszMaxErrorForward != nullptr)
4458 : {
4459 2 : dfMaxErrorForward = CPLAtof(pszMaxErrorForward);
4460 : }
4461 : const char *pszMaxErrorReverse =
4462 107 : CPLGetXMLValue(psTree, "MaxErrorReverse", nullptr);
4463 107 : if (pszMaxErrorReverse != nullptr)
4464 : {
4465 2 : dfMaxErrorReverse = CPLAtof(pszMaxErrorReverse);
4466 : }
4467 :
4468 107 : GDALTransformerFunc pfnBaseTransform = nullptr;
4469 107 : void *pBaseCBData = nullptr;
4470 :
4471 107 : CPLXMLNode *psContainer = CPLGetXMLNode(psTree, "BaseTransformer");
4472 :
4473 107 : if (psContainer != nullptr && psContainer->psChild != nullptr)
4474 : {
4475 107 : GDALDeserializeTransformer(psContainer->psChild, &pfnBaseTransform,
4476 : &pBaseCBData);
4477 : }
4478 :
4479 107 : if (pfnBaseTransform == nullptr)
4480 : {
4481 0 : CPLError(CE_Failure, CPLE_AppDefined,
4482 : "Cannot get base transform for approx transformer.");
4483 0 : return nullptr;
4484 : }
4485 :
4486 107 : void *pApproxCBData = GDALCreateApproxTransformer2(
4487 : pfnBaseTransform, pBaseCBData, dfMaxErrorForward, dfMaxErrorReverse);
4488 107 : GDALApproxTransformerOwnsSubtransformer(pApproxCBData, TRUE);
4489 :
4490 107 : return pApproxCBData;
4491 : }
4492 :
4493 : /************************************************************************/
4494 : /* GDALTransformLonLatToDestApproxTransformer() */
4495 : /************************************************************************/
4496 :
4497 3030 : int GDALTransformLonLatToDestApproxTransformer(void *hTransformArg,
4498 : double *pdfX, double *pdfY)
4499 : {
4500 3030 : GDALApproxTransformInfo *psInfo =
4501 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4502 :
4503 3030 : if (GDALIsTransformer(psInfo->pBaseCBData,
4504 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4505 : {
4506 3030 : return GDALTransformLonLatToDestGenImgProjTransformer(
4507 3030 : psInfo->pBaseCBData, pdfX, pdfY);
4508 : }
4509 0 : return false;
4510 : }
4511 :
4512 : /************************************************************************/
4513 : /* GDALApplyGeoTransform() */
4514 : /************************************************************************/
4515 :
4516 : /**
4517 : * Apply GeoTransform to x/y coordinate.
4518 : *
4519 : * Applies the following computation, converting a (pixel, line) coordinate
4520 : * into a georeferenced (geo_x, geo_y) location.
4521 : * \code{.c}
4522 : * *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1]
4523 : * + dfLine * padfGeoTransform[2];
4524 : * *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4]
4525 : * + dfLine * padfGeoTransform[5];
4526 : * \endcode
4527 : *
4528 : * @param padfGeoTransform Six coefficient GeoTransform to apply.
4529 : * @param dfPixel Input pixel position.
4530 : * @param dfLine Input line position.
4531 : * @param pdfGeoX output location where geo_x (easting/longitude)
4532 : * location is placed.
4533 : * @param pdfGeoY output location where geo_y (northing/latitude)
4534 : * location is placed.
4535 : */
4536 :
4537 429545 : void CPL_STDCALL GDALApplyGeoTransform(const double *padfGeoTransform,
4538 : double dfPixel, double dfLine,
4539 : double *pdfGeoX, double *pdfGeoY)
4540 : {
4541 429545 : *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1] +
4542 429545 : dfLine * padfGeoTransform[2];
4543 429545 : *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4] +
4544 429545 : dfLine * padfGeoTransform[5];
4545 429545 : }
4546 :
4547 : /************************************************************************/
4548 : /* GDALInvGeoTransform() */
4549 : /************************************************************************/
4550 :
4551 : /**
4552 : * Invert Geotransform.
4553 : *
4554 : * This function will invert a standard 3x2 set of GeoTransform coefficients.
4555 : * This converts the equation from being pixel to geo to being geo to pixel.
4556 : *
4557 : * @param gt_in Input geotransform (six doubles - unaltered).
4558 : * @param gt_out Output geotransform (six doubles - updated).
4559 : *
4560 : * @return TRUE on success or FALSE if the equation is uninvertable.
4561 : */
4562 :
4563 4411 : int CPL_STDCALL GDALInvGeoTransform(const double *gt_in, double *gt_out)
4564 :
4565 : {
4566 : // Special case - no rotation - to avoid computing determinate
4567 : // and potential precision issues.
4568 4411 : if (gt_in[2] == 0.0 && gt_in[4] == 0.0 && gt_in[1] != 0.0 &&
4569 4351 : gt_in[5] != 0.0)
4570 : {
4571 : /*X = gt_in[0] + x * gt_in[1]
4572 : Y = gt_in[3] + y * gt_in[5]
4573 : -->
4574 : x = -gt_in[0] / gt_in[1] + (1 / gt_in[1]) * X
4575 : y = -gt_in[3] / gt_in[5] + (1 / gt_in[5]) * Y
4576 : */
4577 4351 : gt_out[0] = -gt_in[0] / gt_in[1];
4578 4351 : gt_out[1] = 1.0 / gt_in[1];
4579 4351 : gt_out[2] = 0.0;
4580 4351 : gt_out[3] = -gt_in[3] / gt_in[5];
4581 4351 : gt_out[4] = 0.0;
4582 4351 : gt_out[5] = 1.0 / gt_in[5];
4583 4351 : return 1;
4584 : }
4585 :
4586 : // Assume a 3rd row that is [1 0 0].
4587 :
4588 : // Compute determinate.
4589 :
4590 60 : const double det = gt_in[1] * gt_in[5] - gt_in[2] * gt_in[4];
4591 120 : const double magnitude = std::max(std::max(fabs(gt_in[1]), fabs(gt_in[2])),
4592 60 : std::max(fabs(gt_in[4]), fabs(gt_in[5])));
4593 :
4594 60 : if (fabs(det) <= 1e-10 * magnitude * magnitude)
4595 9 : return 0;
4596 :
4597 51 : const double inv_det = 1.0 / det;
4598 :
4599 : // Compute adjoint, and divide by determinate.
4600 :
4601 51 : gt_out[1] = gt_in[5] * inv_det;
4602 51 : gt_out[4] = -gt_in[4] * inv_det;
4603 :
4604 51 : gt_out[2] = -gt_in[2] * inv_det;
4605 51 : gt_out[5] = gt_in[1] * inv_det;
4606 :
4607 51 : gt_out[0] = (gt_in[2] * gt_in[3] - gt_in[0] * gt_in[5]) * inv_det;
4608 51 : gt_out[3] = (-gt_in[1] * gt_in[3] + gt_in[0] * gt_in[4]) * inv_det;
4609 :
4610 51 : return 1;
4611 : }
4612 :
4613 : /************************************************************************/
4614 : /* GDALSerializeTransformer() */
4615 : /************************************************************************/
4616 :
4617 167 : CPLXMLNode *GDALSerializeTransformer(GDALTransformerFunc /* pfnFunc */,
4618 : void *pTransformArg)
4619 : {
4620 167 : VALIDATE_POINTER1(pTransformArg, "GDALSerializeTransformer", nullptr);
4621 :
4622 167 : GDALTransformerInfo *psInfo =
4623 : static_cast<GDALTransformerInfo *>(pTransformArg);
4624 :
4625 167 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4626 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4627 : {
4628 0 : CPLError(CE_Failure, CPLE_AppDefined,
4629 : "Attempt to serialize non-GTI2 transformer.");
4630 0 : return nullptr;
4631 : }
4632 167 : else if (psInfo->pfnSerialize == nullptr)
4633 : {
4634 0 : CPLError(CE_Failure, CPLE_AppDefined,
4635 : "No serialization function available for this transformer.");
4636 0 : return nullptr;
4637 : }
4638 :
4639 167 : return psInfo->pfnSerialize(pTransformArg);
4640 : }
4641 :
4642 : /************************************************************************/
4643 : /* GDALRegisterTransformDeserializer() */
4644 : /************************************************************************/
4645 :
4646 : static CPLList *psListDeserializer = nullptr;
4647 : static CPLMutex *hDeserializerMutex = nullptr;
4648 :
4649 : typedef struct
4650 : {
4651 : char *pszTransformName;
4652 : GDALTransformerFunc pfnTransformerFunc;
4653 : GDALTransformDeserializeFunc pfnDeserializeFunc;
4654 : } TransformDeserializerInfo;
4655 :
4656 0 : void *GDALRegisterTransformDeserializer(
4657 : const char *pszTransformName, GDALTransformerFunc pfnTransformerFunc,
4658 : GDALTransformDeserializeFunc pfnDeserializeFunc)
4659 : {
4660 : TransformDeserializerInfo *psInfo =
4661 : static_cast<TransformDeserializerInfo *>(
4662 0 : CPLMalloc(sizeof(TransformDeserializerInfo)));
4663 0 : psInfo->pszTransformName = CPLStrdup(pszTransformName);
4664 0 : psInfo->pfnTransformerFunc = pfnTransformerFunc;
4665 0 : psInfo->pfnDeserializeFunc = pfnDeserializeFunc;
4666 :
4667 0 : CPLMutexHolderD(&hDeserializerMutex);
4668 0 : psListDeserializer = CPLListInsert(psListDeserializer, psInfo, 0);
4669 :
4670 0 : return psInfo;
4671 : }
4672 :
4673 : /************************************************************************/
4674 : /* GDALUnregisterTransformDeserializer() */
4675 : /************************************************************************/
4676 :
4677 0 : void GDALUnregisterTransformDeserializer(void *pData)
4678 : {
4679 0 : CPLMutexHolderD(&hDeserializerMutex);
4680 0 : CPLList *psList = psListDeserializer;
4681 0 : CPLList *psLast = nullptr;
4682 0 : while (psList)
4683 : {
4684 0 : if (psList->pData == pData)
4685 : {
4686 0 : TransformDeserializerInfo *psInfo =
4687 : static_cast<TransformDeserializerInfo *>(pData);
4688 0 : CPLFree(psInfo->pszTransformName);
4689 0 : CPLFree(pData);
4690 0 : if (psLast)
4691 0 : psLast->psNext = psList->psNext;
4692 : else
4693 0 : psListDeserializer = nullptr;
4694 0 : CPLFree(psList);
4695 0 : break;
4696 : }
4697 0 : psLast = psList;
4698 0 : psList = psList->psNext;
4699 : }
4700 0 : }
4701 :
4702 : /************************************************************************/
4703 : /* GDALUnregisterTransformDeserializer() */
4704 : /************************************************************************/
4705 :
4706 1301 : void GDALCleanupTransformDeserializerMutex()
4707 : {
4708 1301 : if (hDeserializerMutex != nullptr)
4709 : {
4710 0 : CPLDestroyMutex(hDeserializerMutex);
4711 0 : hDeserializerMutex = nullptr;
4712 : }
4713 1301 : }
4714 :
4715 : /************************************************************************/
4716 : /* GDALDeserializeTransformer() */
4717 : /************************************************************************/
4718 :
4719 420 : CPLErr GDALDeserializeTransformer(CPLXMLNode *psTree,
4720 : GDALTransformerFunc *ppfnFunc,
4721 : void **ppTransformArg)
4722 :
4723 : {
4724 420 : *ppfnFunc = nullptr;
4725 420 : *ppTransformArg = nullptr;
4726 :
4727 420 : CPLErrorReset();
4728 :
4729 420 : if (psTree == nullptr || psTree->eType != CXT_Element)
4730 0 : CPLError(CE_Failure, CPLE_AppDefined,
4731 : "Malformed element in GDALDeserializeTransformer");
4732 420 : else if (EQUAL(psTree->pszValue, "GenImgProjTransformer"))
4733 : {
4734 147 : *ppfnFunc = GDALGenImgProjTransform;
4735 147 : *ppTransformArg = GDALDeserializeGenImgProjTransformer(psTree);
4736 : }
4737 273 : else if (EQUAL(psTree->pszValue, "ReprojectionTransformer"))
4738 : {
4739 153 : *ppfnFunc = GDALReprojectionTransform;
4740 153 : *ppTransformArg = GDALDeserializeReprojectionTransformer(psTree);
4741 : }
4742 120 : else if (EQUAL(psTree->pszValue, "GCPTransformer"))
4743 : {
4744 5 : *ppfnFunc = GDALGCPTransform;
4745 5 : *ppTransformArg = GDALDeserializeGCPTransformer(psTree);
4746 : }
4747 115 : else if (EQUAL(psTree->pszValue, "TPSTransformer"))
4748 : {
4749 3 : *ppfnFunc = GDALTPSTransform;
4750 3 : *ppTransformArg = GDALDeserializeTPSTransformer(psTree);
4751 : }
4752 112 : else if (EQUAL(psTree->pszValue, "GeoLocTransformer"))
4753 : {
4754 1 : *ppfnFunc = GDALGeoLocTransform;
4755 1 : *ppTransformArg = GDALDeserializeGeoLocTransformer(psTree);
4756 : }
4757 111 : else if (EQUAL(psTree->pszValue, "RPCTransformer"))
4758 : {
4759 0 : *ppfnFunc = GDALRPCTransform;
4760 0 : *ppTransformArg = GDALDeserializeRPCTransformer(psTree);
4761 : }
4762 111 : else if (EQUAL(psTree->pszValue, "ApproxTransformer"))
4763 : {
4764 107 : *ppfnFunc = GDALApproxTransform;
4765 107 : *ppTransformArg = GDALDeserializeApproxTransformer(psTree);
4766 : }
4767 4 : else if (EQUAL(psTree->pszValue, "HomographyTransformer"))
4768 : {
4769 4 : *ppfnFunc = GDALHomographyTransform;
4770 4 : *ppTransformArg = GDALDeserializeHomographyTransformer(psTree);
4771 : }
4772 : else
4773 : {
4774 0 : GDALTransformDeserializeFunc pfnDeserializeFunc = nullptr;
4775 : {
4776 0 : CPLMutexHolderD(&hDeserializerMutex);
4777 0 : CPLList *psList = psListDeserializer;
4778 0 : while (psList)
4779 : {
4780 0 : TransformDeserializerInfo *psInfo =
4781 : static_cast<TransformDeserializerInfo *>(psList->pData);
4782 0 : if (strcmp(psInfo->pszTransformName, psTree->pszValue) == 0)
4783 : {
4784 0 : *ppfnFunc = psInfo->pfnTransformerFunc;
4785 0 : pfnDeserializeFunc = psInfo->pfnDeserializeFunc;
4786 0 : break;
4787 : }
4788 0 : psList = psList->psNext;
4789 : }
4790 : }
4791 :
4792 0 : if (pfnDeserializeFunc != nullptr)
4793 : {
4794 0 : *ppTransformArg = pfnDeserializeFunc(psTree);
4795 : }
4796 : else
4797 : {
4798 0 : CPLError(CE_Failure, CPLE_AppDefined,
4799 : "Unrecognized element '%s' GDALDeserializeTransformer",
4800 : psTree->pszValue);
4801 : }
4802 : }
4803 :
4804 420 : return CPLGetLastErrorType();
4805 : }
4806 :
4807 : /************************************************************************/
4808 : /* GDALDestroyTransformer() */
4809 : /************************************************************************/
4810 :
4811 5344 : void GDALDestroyTransformer(void *pTransformArg)
4812 :
4813 : {
4814 5344 : if (pTransformArg == nullptr)
4815 0 : return;
4816 :
4817 5344 : GDALTransformerInfo *psInfo =
4818 : static_cast<GDALTransformerInfo *>(pTransformArg);
4819 :
4820 5344 : if (memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4821 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4822 : {
4823 0 : CPLError(CE_Failure, CPLE_AppDefined,
4824 : "Attempt to destroy non-GTI2 transformer.");
4825 0 : return;
4826 : }
4827 :
4828 5344 : psInfo->pfnCleanup(pTransformArg);
4829 : }
4830 :
4831 : /************************************************************************/
4832 : /* GDALUseTransformer() */
4833 : /************************************************************************/
4834 :
4835 8683 : int GDALUseTransformer(void *pTransformArg, int bDstToSrc, int nPointCount,
4836 : double *x, double *y, double *z, int *panSuccess)
4837 : {
4838 8683 : GDALTransformerInfo *psInfo =
4839 : static_cast<GDALTransformerInfo *>(pTransformArg);
4840 :
4841 8683 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4842 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4843 : {
4844 0 : CPLError(CE_Failure, CPLE_AppDefined,
4845 : "Attempt to use non-GTI2 transformer.");
4846 0 : return FALSE;
4847 : }
4848 :
4849 8683 : return psInfo->pfnTransform(pTransformArg, bDstToSrc, nPointCount, x, y, z,
4850 8683 : panSuccess);
4851 : }
4852 :
4853 : /************************************************************************/
4854 : /* GDALCloneTransformer() */
4855 : /************************************************************************/
4856 :
4857 71 : void *GDALCloneTransformer(void *pTransformArg)
4858 : {
4859 71 : GDALTransformerInfo *psInfo =
4860 : static_cast<GDALTransformerInfo *>(pTransformArg);
4861 :
4862 71 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4863 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4864 : {
4865 0 : CPLError(CE_Failure, CPLE_AppDefined,
4866 : "Attempt to clone non-GTI2 transformer.");
4867 0 : return nullptr;
4868 : }
4869 :
4870 71 : if (psInfo->pfnCreateSimilar != nullptr)
4871 : {
4872 36 : return psInfo->pfnCreateSimilar(psInfo, 1.0, 1.0);
4873 : }
4874 :
4875 35 : if (psInfo->pfnSerialize == nullptr)
4876 : {
4877 0 : CPLError(CE_Failure, CPLE_AppDefined,
4878 : "No serialization function available for this transformer.");
4879 0 : return nullptr;
4880 : }
4881 :
4882 35 : CPLXMLNode *pSerialized = psInfo->pfnSerialize(pTransformArg);
4883 35 : if (pSerialized == nullptr)
4884 0 : return nullptr;
4885 35 : GDALTransformerFunc pfnTransformer = nullptr;
4886 35 : void *pClonedTransformArg = nullptr;
4887 35 : if (GDALDeserializeTransformer(pSerialized, &pfnTransformer,
4888 35 : &pClonedTransformArg) != CE_None)
4889 : {
4890 0 : CPLDestroyXMLNode(pSerialized);
4891 0 : CPLFree(pClonedTransformArg);
4892 0 : return nullptr;
4893 : }
4894 :
4895 35 : CPLDestroyXMLNode(pSerialized);
4896 35 : return pClonedTransformArg;
4897 : }
4898 :
4899 : /************************************************************************/
4900 : /* GDALCreateSimilarTransformer() */
4901 : /************************************************************************/
4902 :
4903 71 : void *GDALCreateSimilarTransformer(void *pTransformArg, double dfRatioX,
4904 : double dfRatioY)
4905 : {
4906 71 : GDALTransformerInfo *psInfo =
4907 : static_cast<GDALTransformerInfo *>(pTransformArg);
4908 :
4909 71 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4910 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4911 : {
4912 0 : CPLError(CE_Failure, CPLE_AppDefined,
4913 : "Attempt to call CreateSimilar on a non-GTI2 transformer.");
4914 0 : return nullptr;
4915 : }
4916 :
4917 71 : if (psInfo->pfnCreateSimilar == nullptr)
4918 : {
4919 0 : CPLError(CE_Failure, CPLE_AppDefined,
4920 : "No CreateSimilar function available for this transformer.");
4921 0 : return nullptr;
4922 : }
4923 :
4924 71 : return psInfo->pfnCreateSimilar(psInfo, dfRatioX, dfRatioY);
4925 : }
4926 :
4927 : /************************************************************************/
4928 : /* GetGenImgProjTransformInfo() */
4929 : /************************************************************************/
4930 :
4931 46 : static GDALTransformerInfo *GetGenImgProjTransformInfo(const char *pszFunc,
4932 : void *pTransformArg)
4933 : {
4934 46 : GDALTransformerInfo *psInfo =
4935 : static_cast<GDALTransformerInfo *>(pTransformArg);
4936 :
4937 46 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4938 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4939 : {
4940 0 : CPLError(CE_Failure, CPLE_AppDefined,
4941 : "Attempt to call %s on "
4942 : "a non-GTI2 transformer.",
4943 : pszFunc);
4944 0 : return nullptr;
4945 : }
4946 :
4947 46 : if (EQUAL(psInfo->pszClassName, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
4948 : {
4949 16 : GDALApproxTransformInfo *psATInfo =
4950 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
4951 16 : psInfo = static_cast<GDALTransformerInfo *>(psATInfo->pBaseCBData);
4952 :
4953 16 : if (psInfo == nullptr ||
4954 16 : memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4955 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4956 : {
4957 0 : CPLError(CE_Failure, CPLE_AppDefined,
4958 : "Attempt to call %s on "
4959 : "a non-GTI2 transformer.",
4960 : pszFunc);
4961 0 : return nullptr;
4962 : }
4963 : }
4964 :
4965 46 : if (EQUAL(psInfo->pszClassName, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4966 : {
4967 46 : return psInfo;
4968 : }
4969 :
4970 0 : return nullptr;
4971 : }
4972 :
4973 : /************************************************************************/
4974 : /* GDALSetTransformerDstGeoTransform() */
4975 : /************************************************************************/
4976 :
4977 : /**
4978 : * Set ApproxTransformer or GenImgProj output geotransform.
4979 : *
4980 : * This is a layer above GDALSetGenImgProjTransformerDstGeoTransform() that
4981 : * checks that the passed hTransformArg is compatible.
4982 : *
4983 : * Normally the "destination geotransform", or transformation between
4984 : * georeferenced output coordinates and pixel/line coordinates on the
4985 : * destination file is extracted from the destination file by
4986 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
4987 : * info. However, sometimes it is inconvenient to have an output file
4988 : * handle with appropriate geotransform information when creating the
4989 : * transformation. For these cases, this function can be used to apply
4990 : * the destination geotransform.
4991 : *
4992 : * @param pTransformArg the handle to update.
4993 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
4994 : */
4995 :
4996 23 : void GDALSetTransformerDstGeoTransform(void *pTransformArg,
4997 : const double *padfGeoTransform)
4998 : {
4999 23 : VALIDATE_POINTER0(pTransformArg, "GDALSetTransformerDstGeoTransform");
5000 :
5001 23 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
5002 : "GDALSetTransformerDstGeoTransform", pTransformArg);
5003 23 : if (psInfo)
5004 : {
5005 23 : GDALSetGenImgProjTransformerDstGeoTransform(psInfo, padfGeoTransform);
5006 : }
5007 : }
5008 :
5009 : /************************************************************************/
5010 : /* GDALGetTransformerDstGeoTransform() */
5011 : /************************************************************************/
5012 :
5013 : /**
5014 : * Get ApproxTransformer or GenImgProj output geotransform.
5015 : *
5016 : * @param pTransformArg transformer handle.
5017 : * @param padfGeoTransform (output) the destination geotransform to return (six
5018 : * doubles).
5019 : */
5020 :
5021 23 : void GDALGetTransformerDstGeoTransform(void *pTransformArg,
5022 : double *padfGeoTransform)
5023 : {
5024 23 : VALIDATE_POINTER0(pTransformArg, "GDALGetTransformerDstGeoTransform");
5025 :
5026 23 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
5027 : "GDALGetTransformerDstGeoTransform", pTransformArg);
5028 23 : if (psInfo)
5029 : {
5030 23 : GDALGenImgProjTransformInfo *psGenImgProjInfo =
5031 : reinterpret_cast<GDALGenImgProjTransformInfo *>(psInfo);
5032 :
5033 23 : memcpy(padfGeoTransform, psGenImgProjInfo->sDstParams.adfGeoTransform,
5034 : sizeof(double) * 6);
5035 : }
5036 : }
5037 :
5038 : /************************************************************************/
5039 : /* GDALTransformIsTranslationOnPixelBoundaries() */
5040 : /************************************************************************/
5041 :
5042 1825 : bool GDALTransformIsTranslationOnPixelBoundaries(GDALTransformerFunc,
5043 : void *pTransformerArg)
5044 : {
5045 1825 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5046 : {
5047 1515 : const auto *pApproxInfo =
5048 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5049 1515 : pTransformerArg = pApproxInfo->pBaseCBData;
5050 : }
5051 1825 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5052 : {
5053 1672 : const auto *pGenImgpProjInfo =
5054 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5055 558 : const auto IsCloseToInteger = [](double dfVal)
5056 558 : { return std::fabs(dfVal - std::round(dfVal)) <= 1e-6; };
5057 3260 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5058 1588 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5059 1586 : pGenImgpProjInfo->pReproject == nullptr &&
5060 684 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[1] ==
5061 684 : pGenImgpProjInfo->sDstParams.adfGeoTransform[1] &&
5062 415 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[5] ==
5063 415 : pGenImgpProjInfo->sDstParams.adfGeoTransform[5] &&
5064 297 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] ==
5065 297 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] &&
5066 297 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] ==
5067 594 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] &&
5068 : // Check that the georeferenced origin of the destination
5069 : // geotransform is close to be an integer value when transformed
5070 : // to source image coordinates
5071 297 : IsCloseToInteger(
5072 297 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[0] +
5073 297 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5074 297 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[1] +
5075 297 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5076 3557 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[2]) &&
5077 261 : IsCloseToInteger(
5078 261 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[3] +
5079 261 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5080 261 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[4] +
5081 261 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5082 1933 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[5]);
5083 : }
5084 153 : return false;
5085 : }
5086 :
5087 : /************************************************************************/
5088 : /* GDALTransformIsAffineNoRotation() */
5089 : /************************************************************************/
5090 :
5091 19 : bool GDALTransformIsAffineNoRotation(GDALTransformerFunc, void *pTransformerArg)
5092 : {
5093 19 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5094 : {
5095 19 : const auto *pApproxInfo =
5096 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5097 19 : pTransformerArg = pApproxInfo->pBaseCBData;
5098 : }
5099 19 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5100 : {
5101 19 : const auto *pGenImgpProjInfo =
5102 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5103 38 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5104 19 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5105 19 : pGenImgpProjInfo->pReproject == nullptr &&
5106 9 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] == 0 &&
5107 9 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] == 0 &&
5108 47 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] == 0 &&
5109 28 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] == 0;
5110 : }
5111 0 : return false;
5112 : }
5113 :
5114 : /************************************************************************/
5115 : /* GDALTransformHasFastClone() */
5116 : /************************************************************************/
5117 :
5118 : /** Returns whether GDALCloneTransformer() on this transformer is
5119 : * "fast"
5120 : * Counter-examples are GCPs or TPSs transformers.
5121 : */
5122 2 : bool GDALTransformHasFastClone(void *pTransformerArg)
5123 : {
5124 2 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5125 : {
5126 1 : const auto *pApproxInfo =
5127 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5128 1 : pTransformerArg = pApproxInfo->pBaseCBData;
5129 : // Fallback to next lines
5130 : }
5131 :
5132 2 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5133 : {
5134 2 : const auto *pGenImgpProjInfo =
5135 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5136 2 : return (pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr ||
5137 0 : GDALTransformHasFastClone(
5138 4 : pGenImgpProjInfo->sSrcParams.pTransformArg)) &&
5139 2 : (pGenImgpProjInfo->sDstParams.pTransformArg == nullptr ||
5140 0 : GDALTransformHasFastClone(
5141 2 : pGenImgpProjInfo->sDstParams.pTransformArg));
5142 : }
5143 0 : else if (GDALIsTransformer(pTransformerArg,
5144 : GDAL_RPC_TRANSFORMER_CLASS_NAME))
5145 : {
5146 0 : return true;
5147 : }
5148 : else
5149 : {
5150 0 : return false;
5151 : }
5152 : }
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