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 14658 : bool GDALIsTransformer(void *hTransformerArg, const char *pszClassName)
68 : {
69 14658 : if (!hTransformerArg)
70 604 : return false;
71 : // All transformers should have a GDALTransformerInfo member as their first members
72 14054 : GDALTransformerInfo *psInfo =
73 : static_cast<GDALTransformerInfo *>(hTransformerArg);
74 14054 : return memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
75 27214 : strlen(GDAL_GTI2_SIGNATURE)) == 0 &&
76 27214 : 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 41 : CPLErr CPL_STDCALL GDALSuggestedWarpOutput(GDALDatasetH hSrcDS,
174 : GDALTransformerFunc pfnTransformer,
175 : void *pTransformArg,
176 : double *padfGeoTransformOut,
177 : int *pnPixels, int *pnLines)
178 :
179 : {
180 41 : VALIDATE_POINTER1(hSrcDS, "GDALSuggestedWarpOutput", CE_Failure);
181 :
182 41 : double adfExtent[4] = {};
183 :
184 41 : return GDALSuggestedWarpOutput2(hSrcDS, pfnTransformer, pTransformArg,
185 : padfGeoTransformOut, pnPixels, pnLines,
186 41 : adfExtent, 0);
187 : }
188 :
189 622 : static bool GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
190 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
191 : int /* nPixels*/, int nLines, double dfPixelSizeX, double dfPixelSizeY)
192 : {
193 622 : double adfX[21] = {};
194 622 : double adfY[21] = {};
195 :
196 622 : const double dfMaxXOut = padfExtent[2];
197 622 : const double dfMaxYOut = padfExtent[3];
198 :
199 : // Take 20 steps.
200 622 : int nSamplePoints = 0;
201 13684 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
202 : {
203 : // Ensure we end exactly at the end.
204 13062 : if (dfRatio > 0.99)
205 622 : dfRatio = 1.0;
206 :
207 : // Along right.
208 13062 : adfX[nSamplePoints] = dfMaxXOut;
209 13062 : adfY[nSamplePoints] = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
210 13062 : nSamplePoints++;
211 : }
212 622 : double adfZ[21] = {};
213 :
214 622 : int abSuccess[21] = {};
215 :
216 622 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
217 : abSuccess);
218 :
219 622 : int abSuccess2[21] = {};
220 :
221 622 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
222 : abSuccess2);
223 :
224 622 : nSamplePoints = 0;
225 622 : int nBadCount = 0;
226 13684 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
227 : {
228 13062 : const double expected_x = dfMaxXOut;
229 13062 : const double expected_y = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
230 13062 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
231 10218 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
232 8844 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
233 : {
234 4218 : nBadCount++;
235 : }
236 13062 : nSamplePoints++;
237 : }
238 :
239 622 : return nBadCount == nSamplePoints;
240 : }
241 :
242 525 : static bool GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
243 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
244 : int nPixels, int /* nLines */, double dfPixelSizeX, double dfPixelSizeY)
245 : {
246 525 : double adfX[21] = {};
247 525 : double adfY[21] = {};
248 :
249 525 : const double dfMinXOut = padfExtent[0];
250 525 : const double dfMinYOut = padfExtent[1];
251 :
252 : // Take 20 steps.
253 525 : int nSamplePoints = 0;
254 11550 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
255 : {
256 : // Ensure we end exactly at the end.
257 11025 : if (dfRatio > 0.99)
258 525 : dfRatio = 1.0;
259 :
260 : // Along right.
261 11025 : adfX[nSamplePoints] = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
262 11025 : adfY[nSamplePoints] = dfMinYOut;
263 11025 : nSamplePoints++;
264 : }
265 525 : double adfZ[21] = {};
266 :
267 525 : int abSuccess[21] = {};
268 :
269 525 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
270 : abSuccess);
271 :
272 525 : int abSuccess2[21] = {};
273 :
274 525 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
275 : abSuccess2);
276 :
277 525 : nSamplePoints = 0;
278 525 : int nBadCount = 0;
279 11550 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
280 : {
281 11025 : const double expected_x = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
282 11025 : const double expected_y = dfMinYOut;
283 11025 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
284 9067 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
285 8778 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
286 : {
287 2247 : nBadCount++;
288 : }
289 11025 : nSamplePoints++;
290 : }
291 :
292 525 : 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 1117 : 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 1117 : VALIDATE_POINTER1(hSrcDS, "GDALSuggestedWarpOutput2", CE_Failure);
350 :
351 : const bool bIsGDALGenImgProjTransform{
352 2234 : pTransformArg &&
353 1117 : GDALIsTransformer(pTransformArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME)};
354 :
355 : /* -------------------------------------------------------------------- */
356 : /* Setup sample points all around the edge of the input raster. */
357 : /* -------------------------------------------------------------------- */
358 1117 : if (bIsGDALGenImgProjTransform)
359 : {
360 : // In case CHECK_WITH_INVERT_PROJ has been modified.
361 1117 : 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 1117 : const int nInXSize = GDALGetRasterXSize(hSrcDS);
371 1117 : const int nInYSize = GDALGetRasterYSize(hSrcDS);
372 :
373 : /* ------------------------------------------------------------- */
374 : /* Special case for warping on the same (or null) CRS. */
375 : /* ------------------------------------------------------------- */
376 1117 : if ((!nOptions || (nOptions & GDAL_SWO_FORCE_SQUARE_PIXEL) == 0) &&
377 1116 : pTransformArg && bIsGDALGenImgProjTransform)
378 : {
379 1116 : const GDALGenImgProjTransformInfo *psInfo =
380 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
381 :
382 1116 : if (!psInfo->sSrcParams.pTransformer &&
383 1043 : !psInfo->bHasCustomTransformationPipeline &&
384 1039 : !psInfo->sDstParams.pTransformer &&
385 1039 : psInfo->sSrcParams.adfGeoTransform[2] == 0 &&
386 1039 : psInfo->sSrcParams.adfGeoTransform[4] == 0 &&
387 1039 : psInfo->sDstParams.adfGeoTransform[0] == 0 &&
388 1027 : psInfo->sDstParams.adfGeoTransform[1] == 1 &&
389 1027 : psInfo->sDstParams.adfGeoTransform[2] == 0 &&
390 1027 : psInfo->sDstParams.adfGeoTransform[3] == 0 &&
391 1027 : psInfo->sDstParams.adfGeoTransform[4] == 0 &&
392 1027 : psInfo->sDstParams.adfGeoTransform[5] == 1)
393 : {
394 1027 : const OGRSpatialReference *poSourceCRS = nullptr;
395 1027 : const OGRSpatialReference *poTargetCRS = nullptr;
396 :
397 1027 : if (psInfo->pReprojectArg)
398 : {
399 718 : const GDALReprojectionTransformInfo *psRTI =
400 : static_cast<const GDALReprojectionTransformInfo *>(
401 : psInfo->pReprojectArg);
402 718 : poSourceCRS = psRTI->poForwardTransform->GetSourceCS();
403 718 : poTargetCRS = psRTI->poForwardTransform->GetTargetCS();
404 : }
405 :
406 1745 : if ((!poSourceCRS && !poTargetCRS) ||
407 718 : (poSourceCRS && poTargetCRS &&
408 718 : poSourceCRS->IsSame(poTargetCRS)))
409 : {
410 :
411 657 : const bool bNorthUp{psInfo->sSrcParams.adfGeoTransform[5] <
412 : 0.0};
413 :
414 657 : memcpy(padfGeoTransformOut, psInfo->sSrcParams.adfGeoTransform,
415 : sizeof(double) * 6);
416 :
417 657 : if (!bNorthUp)
418 : {
419 62 : padfGeoTransformOut[3] = padfGeoTransformOut[3] +
420 62 : nInYSize * padfGeoTransformOut[5];
421 62 : padfGeoTransformOut[5] = -padfGeoTransformOut[5];
422 : }
423 :
424 657 : *pnPixels = nInXSize;
425 657 : *pnLines = nInYSize;
426 :
427 : // Calculate extent from hSrcDS
428 657 : if (padfExtent)
429 : {
430 657 : padfExtent[0] = psInfo->sSrcParams.adfGeoTransform[0];
431 657 : padfExtent[1] =
432 657 : psInfo->sSrcParams.adfGeoTransform[3] +
433 657 : nInYSize * psInfo->sSrcParams.adfGeoTransform[5];
434 657 : padfExtent[2] =
435 657 : psInfo->sSrcParams.adfGeoTransform[0] +
436 657 : nInXSize * psInfo->sSrcParams.adfGeoTransform[1];
437 657 : padfExtent[3] = psInfo->sSrcParams.adfGeoTransform[3];
438 657 : if (!bNorthUp)
439 : {
440 62 : std::swap(padfExtent[1], padfExtent[3]);
441 : }
442 : }
443 657 : return CE_None;
444 : }
445 : }
446 : }
447 :
448 460 : const int N_PIXELSTEP = 50;
449 : int nSteps = static_cast<int>(
450 460 : static_cast<double>(std::min(nInYSize, nInXSize)) / N_PIXELSTEP + 0.5);
451 460 : if (nSteps < 20)
452 433 : nSteps = 20;
453 27 : else if (nSteps > 100)
454 12 : 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?
461 460 : retry:
462 460 : int nStepsPlusOne = nSteps + 1;
463 460 : int nSampleMax = nStepsPlusOne * nStepsPlusOne;
464 :
465 460 : double dfStep = 1.0 / nSteps;
466 460 : double *padfY = nullptr;
467 460 : double *padfZ = nullptr;
468 460 : double *padfYRevert = nullptr;
469 460 : double *padfZRevert = nullptr;
470 :
471 : int *pabSuccess = static_cast<int *>(
472 460 : VSI_MALLOC3_VERBOSE(sizeof(int), nStepsPlusOne, nStepsPlusOne));
473 : double *padfX = static_cast<double *>(
474 460 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
475 : double *padfXRevert = static_cast<double *>(
476 460 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
477 460 : 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 :
490 460 : padfY = padfX + nSampleMax;
491 460 : padfZ = padfX + nSampleMax * 2;
492 460 : padfYRevert = padfXRevert + nSampleMax;
493 460 : padfZRevert = padfXRevert + nSampleMax * 2;
494 :
495 : // Take N_STEPS steps.
496 11183 : for (int iStep = 0; iStep <= nSteps; iStep++)
497 : {
498 10723 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
499 10723 : int iStep2 = iStep;
500 :
501 : // Along top.
502 10723 : padfX[iStep2] = dfRatio * nInXSize;
503 10723 : padfY[iStep2] = 0.0;
504 10723 : padfZ[iStep2] = 0.0;
505 :
506 : // Along bottom.
507 10723 : iStep2 += nStepsPlusOne;
508 10723 : padfX[iStep2] = dfRatio * nInXSize;
509 10723 : padfY[iStep2] = nInYSize;
510 10723 : padfZ[iStep2] = 0.0;
511 :
512 : // Along left.
513 10723 : iStep2 += nStepsPlusOne;
514 10723 : padfX[iStep2] = 0.0;
515 10723 : padfY[iStep2] = dfRatio * nInYSize;
516 10723 : padfZ[iStep2] = 0.0;
517 :
518 : // Along right.
519 10723 : iStep2 += nStepsPlusOne;
520 10723 : padfX[iStep2] = nInXSize;
521 10723 : padfY[iStep2] = dfRatio * nInYSize;
522 10723 : padfZ[iStep2] = 0.0;
523 : }
524 :
525 460 : int nSamplePoints = 4 * nStepsPlusOne;
526 :
527 460 : memset(pabSuccess, 1, sizeof(int) * nSampleMax);
528 :
529 : /* -------------------------------------------------------------------- */
530 : /* Transform them to the output coordinate system. */
531 : /* -------------------------------------------------------------------- */
532 : {
533 920 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
534 460 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY, padfZ,
535 : pabSuccess);
536 : }
537 460 : constexpr int SIGN_FINAL_UNINIT = -2;
538 460 : constexpr int SIGN_FINAL_INVALID = 0;
539 460 : int iSignDiscontinuity = SIGN_FINAL_UNINIT;
540 460 : int nFailedCount = 0;
541 460 : const int iSignArray[2] = {-1, 1};
542 43352 : for (int i = 0; i < nSamplePoints; i++)
543 : {
544 42892 : 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 37980 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
552 : {
553 10714 : if (!((iSignDiscontinuity * padfX[i] > 0 &&
554 10646 : iSignDiscontinuity * padfX[i] <= 180.0) ||
555 69 : (fabs(padfX[i] - iSignDiscontinuity * -180.0) < 1e-8)))
556 : {
557 46 : iSignDiscontinuity = SIGN_FINAL_INVALID;
558 : }
559 : }
560 27266 : else if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
561 : {
562 1099 : for (const auto &iSign : iSignArray)
563 : {
564 802 : if ((iSign * padfX[i] > 0 && iSign * padfX[i] <= 180.0) ||
565 641 : (fabs(padfX[i] - iSign * -180.0) < 1e-8))
566 : {
567 161 : iSignDiscontinuity = iSign;
568 161 : break;
569 : }
570 : }
571 458 : if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
572 : {
573 297 : iSignDiscontinuity = SIGN_FINAL_INVALID;
574 : }
575 : }
576 : }
577 : else
578 : {
579 4912 : nFailedCount++;
580 : }
581 : }
582 :
583 460 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
584 : {
585 11103 : for (int i = 0; i < nSamplePoints; i++)
586 : {
587 10988 : if (pabSuccess[i])
588 : {
589 10371 : 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 : /* -------------------------------------------------------------------- */
613 460 : if (nFailedCount)
614 : {
615 121 : CPLDebug("WARP", "At least one point failed after direct transform");
616 : }
617 : else
618 : {
619 339 : memcpy(padfXRevert, padfX, nSamplePoints * sizeof(double));
620 339 : memcpy(padfYRevert, padfY, nSamplePoints * sizeof(double));
621 339 : memcpy(padfZRevert, padfZ, nSamplePoints * sizeof(double));
622 : {
623 678 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
624 339 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, padfXRevert,
625 : padfYRevert, padfZRevert, pabSuccess);
626 : }
627 :
628 30949 : for (int i = 0; nFailedCount == 0 && i < nSamplePoints; i++)
629 : {
630 30626 : if (!pabSuccess[i])
631 : {
632 16 : nFailedCount++;
633 16 : break;
634 : }
635 :
636 30610 : double dfRatio = (i % nStepsPlusOne) * dfStep;
637 30610 : if (dfRatio > 0.99)
638 1278 : dfRatio = 1.0;
639 :
640 30610 : double dfExpectedX = 0.0;
641 30610 : double dfExpectedY = 0.0;
642 30610 : if (i < nStepsPlusOne)
643 : {
644 7786 : dfExpectedX = dfRatio * nInXSize;
645 : }
646 22824 : else if (i < 2 * nStepsPlusOne)
647 : {
648 7736 : dfExpectedX = dfRatio * nInXSize;
649 7736 : dfExpectedY = nInYSize;
650 : }
651 15088 : else if (i < 3 * nStepsPlusOne)
652 : {
653 7606 : dfExpectedY = dfRatio * nInYSize;
654 : }
655 : else
656 : {
657 7482 : dfExpectedX = nInXSize;
658 7482 : dfExpectedY = dfRatio * nInYSize;
659 : }
660 :
661 30610 : if (fabs(padfXRevert[i] - dfExpectedX) >
662 30610 : nInXSize / static_cast<double>(nSteps) ||
663 30598 : fabs(padfYRevert[i] - dfExpectedY) >
664 30598 : nInYSize / static_cast<double>(nSteps))
665 12 : nFailedCount++;
666 : }
667 339 : if (nFailedCount != 0)
668 28 : 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 : /* -------------------------------------------------------------------- */
677 460 : if (nFailedCount)
678 : {
679 149 : nSamplePoints = 0;
680 :
681 : // Take N_STEPS steps.
682 3432 : for (int iStep = 0; iStep <= nSteps; iStep++)
683 : {
684 3283 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
685 :
686 85752 : for (int iStep2 = 0; iStep2 <= nSteps; iStep2++)
687 : {
688 82469 : const double dfRatio2 =
689 82469 : iStep2 == nSteps ? 1.0 : iStep2 * dfStep;
690 :
691 : // From top to bottom, from left to right.
692 82469 : padfX[nSamplePoints] = dfRatio2 * nInXSize;
693 82469 : padfY[nSamplePoints] = dfRatio * nInYSize;
694 82469 : padfZ[nSamplePoints] = 0.0;
695 82469 : nSamplePoints++;
696 : }
697 : }
698 :
699 149 : CPLAssert(nSamplePoints == nSampleMax);
700 :
701 : {
702 298 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
703 149 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY,
704 : padfZ, pabSuccess);
705 : }
706 : }
707 :
708 : /* -------------------------------------------------------------------- */
709 : /* Collect the bounds, ignoring any failed points. */
710 : /* -------------------------------------------------------------------- */
711 460 : double dfMinXOut = 0.0;
712 460 : double dfMinYOut = 0.0;
713 460 : double dfMaxXOut = 0.0;
714 460 : double dfMaxYOut = 0.0;
715 460 : bool bGotInitialPoint = false;
716 :
717 460 : nFailedCount = 0;
718 112689 : for (int i = 0; i < nSamplePoints; i++)
719 : {
720 112229 : int x_i = 0;
721 112229 : int y_i = 0;
722 :
723 112229 : if (nSamplePoints == nSampleMax)
724 : {
725 82469 : x_i = i % nStepsPlusOne;
726 82469 : y_i = i / nStepsPlusOne;
727 : }
728 : else
729 : {
730 29760 : if (i < 2 * nStepsPlusOne)
731 : {
732 14880 : x_i = i % nStepsPlusOne;
733 14880 : y_i = (i < nStepsPlusOne) ? 0 : nSteps;
734 : }
735 : }
736 :
737 112229 : if (x_i > 0 && (pabSuccess[i - 1] || pabSuccess[i]))
738 : {
739 80025 : double x_out_before = padfX[i - 1];
740 80025 : double x_out_after = padfX[i];
741 80025 : int nIter = 0;
742 80025 : double x_in_before =
743 80025 : static_cast<double>(x_i - 1) * nInXSize / nSteps;
744 80025 : double x_in_after = static_cast<double>(x_i) * nInXSize / nSteps;
745 80025 : int invalid_before = !(pabSuccess[i - 1]);
746 80025 : 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 98630 : while ((invalid_before || invalid_after ||
753 204927 : 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 112229 : if (!pabSuccess[i])
813 : {
814 14495 : nFailedCount++;
815 14495 : continue;
816 : }
817 :
818 97734 : if (bGotInitialPoint)
819 : {
820 97296 : dfMinXOut = std::min(dfMinXOut, padfX[i]);
821 97296 : dfMinYOut = std::min(dfMinYOut, padfY[i]);
822 97296 : dfMaxXOut = std::max(dfMaxXOut, padfX[i]);
823 97296 : dfMaxYOut = std::max(dfMaxYOut, padfY[i]);
824 : }
825 : else
826 : {
827 438 : bGotInitialPoint = true;
828 438 : dfMinXOut = padfX[i];
829 438 : dfMaxXOut = padfX[i];
830 438 : dfMinYOut = padfY[i];
831 438 : dfMaxYOut = padfY[i];
832 : }
833 : }
834 :
835 460 : 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 :
849 455 : if (nFailedCount)
850 117 : CPLDebug("GDAL",
851 : "GDALSuggestedWarpOutput(): %d out of %d points failed to "
852 : "transform.",
853 : nFailedCount, nSamplePoints);
854 :
855 455 : bool bIsGeographicCoordsDeg = false;
856 455 : if (bIsGDALGenImgProjTransform)
857 : {
858 455 : const GDALGenImgProjTransformInfo *pGIPTI =
859 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
860 455 : if (pGIPTI->sSrcParams.pTransformer == GDALGeoLocTransform &&
861 28 : pGIPTI->sDstParams.pTransformer == nullptr &&
862 28 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
863 26 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
864 26 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
865 26 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
866 26 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
867 26 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
868 : {
869 : /* --------------------------------------------------------------------
870 : */
871 : /* Special case for geolocation array, to quickly find the
872 : * bounds. */
873 : /* --------------------------------------------------------------------
874 : */
875 26 : const GDALGeoLocTransformInfo *pGLTI =
876 : static_cast<const GDALGeoLocTransformInfo *>(
877 : pGIPTI->sSrcParams.pTransformArg);
878 :
879 26 : if (pGIPTI->pReproject == nullptr)
880 : {
881 : const char *pszGLSRS =
882 26 : CSLFetchNameValue(pGLTI->papszGeolocationInfo, "SRS");
883 26 : if (pszGLSRS == nullptr)
884 : {
885 4 : 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 :
900 208 : for (const auto &xy :
901 26 : {std::pair<double, double>(pGLTI->dfMinX, pGLTI->dfYAtMinX),
902 26 : std::pair<double, double>(pGLTI->dfXAtMinY, pGLTI->dfMinY),
903 26 : std::pair<double, double>(pGLTI->dfMaxX, pGLTI->dfYAtMaxX),
904 130 : std::pair<double, double>(pGLTI->dfXAtMaxY, pGLTI->dfMaxY)})
905 : {
906 104 : double x = xy.first;
907 104 : double y = xy.second;
908 104 : if (pGLTI->bSwapXY)
909 : {
910 4 : std::swap(x, y);
911 : }
912 104 : double xOut = std::numeric_limits<double>::quiet_NaN();
913 104 : double yOut = std::numeric_limits<double>::quiet_NaN();
914 104 : if (pGIPTI->pReproject == nullptr ||
915 0 : pGIPTI->pReproject(pGIPTI->pReprojectArg, false, 1, &x, &y,
916 : nullptr, nullptr))
917 : {
918 104 : xOut = x;
919 104 : yOut = y;
920 : }
921 104 : dfMinXOut = std::min(dfMinXOut, xOut);
922 104 : dfMinYOut = std::min(dfMinYOut, yOut);
923 104 : dfMaxXOut = std::max(dfMaxXOut, xOut);
924 104 : dfMaxYOut = std::max(dfMaxYOut, yOut);
925 26 : }
926 : }
927 429 : else if (pGIPTI->sSrcParams.pTransformer == nullptr &&
928 386 : pGIPTI->sDstParams.pTransformer == nullptr &&
929 386 : pGIPTI->pReproject == GDALReprojectionTransform &&
930 375 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
931 373 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
932 373 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
933 373 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
934 373 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
935 373 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
936 : {
937 : /* ------------------------------------------------------------- */
938 : /* Special case for warping using source geotransform and */
939 : /* reprojection to deal with the poles. */
940 : /* ------------------------------------------------------------- */
941 373 : const GDALReprojectionTransformInfo *psRTI =
942 : static_cast<const GDALReprojectionTransformInfo *>(
943 : pGIPTI->pReprojectArg);
944 : const OGRSpatialReference *poSourceCRS =
945 373 : psRTI->poForwardTransform->GetSourceCS();
946 : const OGRSpatialReference *poTargetCRS =
947 373 : psRTI->poForwardTransform->GetTargetCS();
948 745 : if (poTargetCRS != nullptr &&
949 372 : psRTI->poReverseTransform != nullptr &&
950 372 : poTargetCRS->IsGeographic() &&
951 117 : fabs(poTargetCRS->GetAngularUnits() -
952 862 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9 &&
953 117 : (!poSourceCRS || !poSourceCRS->IsGeographic()))
954 : {
955 90 : bIsGeographicCoordsDeg = true;
956 :
957 90 : std::unique_ptr<CPLConfigOptionSetter> poSetter;
958 90 : 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 :
970 270 : for (const auto &sign : iSignArray)
971 : {
972 180 : double X = 0.0;
973 180 : const double Yinit = 90.0 * sign;
974 180 : double Y = Yinit;
975 180 : if (psRTI->poReverseTransform->Transform(1, &X, &Y))
976 : {
977 122 : const auto invGT =
978 : pGIPTI->sSrcParams.adfInvGeoTransform;
979 122 : const double x = invGT[0] + X * invGT[1] + Y * invGT[2];
980 122 : const double y = invGT[3] + X * invGT[4] + Y * invGT[5];
981 122 : constexpr double EPSILON = 1e-5;
982 122 : if (x >= -EPSILON && x <= nInXSize + EPSILON &&
983 26 : 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 90 : 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 373 : if (poSourceCRS != nullptr && poTargetCRS != nullptr &&
1035 372 : pGIPTI->sSrcParams.adfGeoTransform[1] != 0 &&
1036 372 : pGIPTI->sSrcParams.adfGeoTransform[2] == 0 &&
1037 372 : pGIPTI->sSrcParams.adfGeoTransform[4] == 0 &&
1038 372 : pGIPTI->sSrcParams.adfGeoTransform[5] != 0)
1039 : {
1040 372 : const double dfULX = pGIPTI->sSrcParams.adfGeoTransform[0];
1041 372 : const double dfULY = pGIPTI->sSrcParams.adfGeoTransform[3];
1042 372 : const double dfLRX =
1043 372 : dfULX + pGIPTI->sSrcParams.adfGeoTransform[1] * nInXSize;
1044 372 : const double dfLRY =
1045 372 : dfULY + pGIPTI->sSrcParams.adfGeoTransform[5] * nInYSize;
1046 372 : const double dfMinSrcX = std::min(dfULX, dfLRX);
1047 372 : const double dfMinSrcY = std::min(dfULY, dfLRY);
1048 372 : const double dfMaxSrcX = std::max(dfULX, dfLRX);
1049 372 : const double dfMaxSrcY = std::max(dfULY, dfLRY);
1050 372 : double dfTmpMinXOut = std::numeric_limits<double>::max();
1051 372 : double dfTmpMinYOut = std::numeric_limits<double>::max();
1052 372 : double dfTmpMaxXOut = std::numeric_limits<double>::min();
1053 372 : double dfTmpMaxYOut = std::numeric_limits<double>::min();
1054 744 : if (psRTI->poForwardTransform->TransformBounds(
1055 : dfMinSrcX, dfMinSrcY, dfMaxSrcX, dfMaxSrcY,
1056 : &dfTmpMinXOut, &dfTmpMinYOut, &dfTmpMaxXOut,
1057 : &dfTmpMaxYOut,
1058 372 : 2)) // minimum number of points as we already have a
1059 : // logic above to sample
1060 : {
1061 365 : dfMinXOut = std::min(dfMinXOut, dfTmpMinXOut);
1062 365 : dfMinYOut = std::min(dfMinYOut, dfTmpMinYOut);
1063 365 : dfMaxXOut = std::max(dfMaxXOut, dfTmpMaxXOut);
1064 365 : 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 455 : double dfDiagonalDist = 0.0;
1078 455 : double dfDeltaX = 0.0;
1079 455 : double dfDeltaY = 0.0;
1080 :
1081 455 : if (pabSuccess[0] && pabSuccess[nSamplePoints - 1])
1082 : {
1083 343 : dfDeltaX = padfX[nSamplePoints - 1] - padfX[0];
1084 343 : 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 455 : if (dfDeltaX == 0.0 || dfDeltaY == 0.0)
1089 : {
1090 118 : dfDeltaX = dfMaxXOut - dfMinXOut;
1091 118 : dfDeltaY = dfMaxYOut - dfMinYOut;
1092 : }
1093 :
1094 455 : dfDiagonalDist = sqrt(dfDeltaX * dfDeltaX + dfDeltaY * dfDeltaY);
1095 :
1096 : /* -------------------------------------------------------------------- */
1097 : /* Compute a pixel size from this. */
1098 : /* -------------------------------------------------------------------- */
1099 : double dfPixelSize =
1100 455 : dfDiagonalDist / sqrt(static_cast<double>(nInXSize) * nInXSize +
1101 455 : static_cast<double>(nInYSize) * nInYSize);
1102 :
1103 455 : double dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1104 455 : double dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1105 :
1106 455 : const int knIntMaxMinusOne = std::numeric_limits<int>::max() - 1;
1107 455 : if (dfPixels > knIntMaxMinusOne && dfLines <= dfPixels)
1108 : {
1109 0 : dfPixels = knIntMaxMinusOne;
1110 0 : dfPixelSize = (dfMaxXOut - dfMinXOut) / dfPixels;
1111 0 : dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1112 : }
1113 455 : else if (dfLines > knIntMaxMinusOne)
1114 : {
1115 2 : dfLines = knIntMaxMinusOne;
1116 2 : dfPixelSize = (dfMaxYOut - dfMinYOut) / dfLines;
1117 2 : dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1118 : }
1119 :
1120 455 : 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 455 : 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 447 : *pnPixels = static_cast<int>(dfPixels + 0.5);
1142 447 : *pnLines = static_cast<int>(dfLines + 0.5);
1143 : }
1144 :
1145 455 : double dfPixelSizeX = dfPixelSize;
1146 455 : double dfPixelSizeY = dfPixelSize;
1147 :
1148 455 : 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 630 : for (const auto &dfRatio : adfRatioArray)
1156 : {
1157 622 : const double dfTryPixelSizeX =
1158 622 : dfPixelSizeX - dfPixelSizeX * dfRatio / *pnPixels;
1159 622 : double adfExtent[4] = {dfMinXOut, dfMaxYOut - (*pnLines) * dfPixelSizeY,
1160 622 : dfMinXOut + (*pnPixels) * dfTryPixelSizeX,
1161 622 : dfMaxYOut};
1162 622 : if (!GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
1163 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1164 : dfTryPixelSizeX, dfPixelSizeY))
1165 : {
1166 447 : dfPixelSizeX = dfTryPixelSizeX;
1167 447 : 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 535 : for (const auto &dfRatio : adfRatioArray)
1177 : {
1178 525 : const double dfTryPixelSizeY =
1179 525 : dfPixelSizeY - dfPixelSizeY * dfRatio / *pnLines;
1180 : double adfExtent[4] = {
1181 525 : dfMinXOut, dfMaxYOut - (*pnLines) * dfTryPixelSizeY,
1182 525 : dfMinXOut + (*pnPixels) * dfPixelSizeX, dfMaxYOut};
1183 525 : if (!GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
1184 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1185 : dfPixelSizeX, dfTryPixelSizeY))
1186 : {
1187 445 : dfPixelSizeY = dfTryPixelSizeY;
1188 445 : break;
1189 : }
1190 : }
1191 :
1192 : /* -------------------------------------------------------------------- */
1193 : /* Recompute some bounds so that all return values are consistent */
1194 : /* -------------------------------------------------------------------- */
1195 455 : double dfMaxXOutNew = dfMinXOut + (*pnPixels) * dfPixelSizeX;
1196 455 : if (bIsGeographicCoordsDeg &&
1197 114 : ((dfMaxXOut <= 180 && dfMaxXOutNew > 180) || dfMaxXOut == 180))
1198 : {
1199 3 : dfMaxXOut = 180;
1200 3 : dfPixelSizeX = (dfMaxXOut - dfMinXOut) / *pnPixels;
1201 : }
1202 : else
1203 : {
1204 452 : dfMaxXOut = dfMaxXOutNew;
1205 : }
1206 :
1207 455 : double dfMinYOutNew = dfMaxYOut - (*pnLines) * dfPixelSizeY;
1208 455 : if (bIsGeographicCoordsDeg && dfMinYOut >= -90 && dfMinYOutNew < -90)
1209 : {
1210 0 : dfMinYOut = -90;
1211 0 : dfPixelSizeY = (dfMaxYOut - dfMinYOut) / *pnLines;
1212 : }
1213 : else
1214 : {
1215 455 : dfMinYOut = dfMinYOutNew;
1216 : }
1217 :
1218 : /* -------------------------------------------------------------------- */
1219 : /* Return raw extents. */
1220 : /* -------------------------------------------------------------------- */
1221 455 : padfExtent[0] = dfMinXOut;
1222 455 : padfExtent[1] = dfMinYOut;
1223 455 : padfExtent[2] = dfMaxXOut;
1224 455 : padfExtent[3] = dfMaxYOut;
1225 :
1226 : /* -------------------------------------------------------------------- */
1227 : /* Set the output geotransform. */
1228 : /* -------------------------------------------------------------------- */
1229 455 : padfGeoTransformOut[0] = dfMinXOut;
1230 455 : padfGeoTransformOut[1] = dfPixelSizeX;
1231 455 : padfGeoTransformOut[2] = 0.0;
1232 455 : padfGeoTransformOut[3] = dfMaxYOut;
1233 455 : padfGeoTransformOut[4] = 0.0;
1234 455 : padfGeoTransformOut[5] = -dfPixelSizeY;
1235 :
1236 455 : CPLFree(padfX);
1237 455 : CPLFree(padfXRevert);
1238 455 : CPLFree(pabSuccess);
1239 :
1240 455 : return CE_None;
1241 : }
1242 :
1243 : /************************************************************************/
1244 : /* GetCurrentCheckWithInvertPROJ() */
1245 : /************************************************************************/
1246 :
1247 3274 : static bool GetCurrentCheckWithInvertPROJ()
1248 : {
1249 3274 : 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 2043 : static GDALGenImgProjTransformInfo *GDALCreateGenImgProjTransformerInternal()
1261 : {
1262 : /* -------------------------------------------------------------------- */
1263 : /* Initialize the transform info. */
1264 : /* -------------------------------------------------------------------- */
1265 : GDALGenImgProjTransformInfo *psInfo =
1266 : static_cast<GDALGenImgProjTransformInfo *>(
1267 2043 : CPLCalloc(sizeof(GDALGenImgProjTransformInfo), 1));
1268 :
1269 2042 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
1270 : strlen(GDAL_GTI2_SIGNATURE));
1271 2042 : psInfo->sTI.pszClassName = GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME;
1272 2042 : psInfo->sTI.pfnTransform = GDALGenImgProjTransform;
1273 2042 : psInfo->sTI.pfnCleanup = GDALDestroyGenImgProjTransformer;
1274 2042 : psInfo->sTI.pfnSerialize = GDALSerializeGenImgProjTransformer;
1275 2042 : psInfo->sTI.pfnCreateSimilar = GDALCreateSimilarGenImgProjTransformer;
1276 :
1277 2042 : psInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1278 2043 : psInfo->bHasCustomTransformationPipeline = false;
1279 :
1280 2043 : return psInfo;
1281 : }
1282 :
1283 : /************************************************************************/
1284 : /* GDALCreateSimilarGenImgProjTransformer() */
1285 : /************************************************************************/
1286 :
1287 56 : static void *GDALCreateSimilarGenImgProjTransformer(void *hTransformArg,
1288 : double dfRatioX,
1289 : double dfRatioY)
1290 : {
1291 56 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarGenImgProjTransformer",
1292 : nullptr);
1293 :
1294 56 : GDALGenImgProjTransformInfo *psInfo =
1295 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
1296 :
1297 : GDALGenImgProjTransformInfo *psClonedInfo =
1298 56 : GDALCreateGenImgProjTransformerInternal();
1299 :
1300 56 : memcpy(psClonedInfo, psInfo, sizeof(GDALGenImgProjTransformInfo));
1301 :
1302 56 : psClonedInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1303 :
1304 56 : if (psClonedInfo->sSrcParams.pTransformArg)
1305 7 : 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 56 : if (psClonedInfo->pReprojectArg)
1334 35 : psClonedInfo->pReprojectArg =
1335 35 : GDALCloneTransformer(psInfo->pReprojectArg);
1336 :
1337 56 : if (psClonedInfo->sDstParams.pTransformArg)
1338 0 : psClonedInfo->sDstParams.pTransformArg =
1339 0 : GDALCloneTransformer(psInfo->sDstParams.pTransformArg);
1340 :
1341 56 : 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 62 : 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 62 : char **papszOptions = nullptr;
1400 :
1401 62 : if (pszSrcWKT != nullptr)
1402 3 : papszOptions = CSLSetNameValue(papszOptions, "SRC_SRS", pszSrcWKT);
1403 62 : if (pszDstWKT != nullptr)
1404 3 : papszOptions = CSLSetNameValue(papszOptions, "DST_SRS", pszDstWKT);
1405 62 : if (!bGCPUseOK)
1406 0 : papszOptions = CSLSetNameValue(papszOptions, "GCPS_OK", "FALSE");
1407 62 : if (nOrder != 0)
1408 0 : papszOptions = CSLSetNameValue(papszOptions, "MAX_GCP_ORDER",
1409 0 : CPLString().Printf("%d", nOrder));
1410 :
1411 62 : void *pRet = GDALCreateGenImgProjTransformer2(hSrcDS, hDstDS, papszOptions);
1412 62 : CSLDestroy(papszOptions);
1413 :
1414 62 : 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 935 : static void InsertCenterLong(GDALDatasetH hDS, const OGRSpatialReference *poSRS,
1425 : const OGRSpatialReference *poDstSRS,
1426 : const char *pszTargetExtent,
1427 : CPLStringList &aosOptions)
1428 :
1429 : {
1430 1629 : if (!poSRS->IsGeographic() || std::fabs(poSRS->GetAngularUnits() -
1431 694 : CPLAtof(SRS_UA_DEGREE_CONV)) > 1e-9)
1432 : {
1433 244 : return;
1434 : }
1435 :
1436 693 : 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 693 : double adfGeoTransform[6] = {};
1444 :
1445 693 : if (GDALGetGeoTransform(hDS, adfGeoTransform) != CE_None)
1446 0 : return;
1447 :
1448 : /* -------------------------------------------------------------------- */
1449 : /* Compute min/max longitude based on testing the four corners. */
1450 : /* -------------------------------------------------------------------- */
1451 693 : const int nXSize = GDALGetRasterXSize(hDS);
1452 693 : const int nYSize = GDALGetRasterYSize(hDS);
1453 :
1454 : const double dfMinLong =
1455 1386 : std::min(std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1456 693 : 0 * adfGeoTransform[2],
1457 1386 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1458 693 : 0 * adfGeoTransform[2]),
1459 1386 : std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1460 693 : nYSize * adfGeoTransform[2],
1461 1386 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1462 693 : nYSize * adfGeoTransform[2]));
1463 : const double dfMaxLong =
1464 1386 : std::max(std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1465 693 : 0 * adfGeoTransform[2],
1466 1386 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1467 693 : 0 * adfGeoTransform[2]),
1468 1386 : std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1469 693 : nYSize * adfGeoTransform[2],
1470 1386 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1471 693 : 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 693 : 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 691 : const double dfCenterLong = (dfMaxLong + dfMinLong) / 2.0;
1498 691 : aosOptions.SetNameValue("CENTER_LONG", CPLSPrintf("%g", dfCenterLong));
1499 : }
1500 :
1501 : /************************************************************************/
1502 : /* GDALComputeAreaOfInterest() */
1503 : /************************************************************************/
1504 :
1505 1298 : 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 1298 : bool ret = false;
1513 :
1514 1298 : if (!poSRS)
1515 0 : return false;
1516 :
1517 1298 : OGRSpatialReference oSrcSRSHoriz(*poSRS);
1518 1298 : if (oSrcSRSHoriz.IsCompound())
1519 : {
1520 17 : oSrcSRSHoriz.StripVertical();
1521 : }
1522 :
1523 1298 : OGRSpatialReference *poGeog = oSrcSRSHoriz.CloneGeogCS();
1524 1298 : if (poGeog)
1525 : {
1526 1298 : poGeog->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
1527 1298 : poGeog->SetAngularUnits(SRS_UA_DEGREE, CPLAtof(SRS_UA_DEGREE_CONV));
1528 :
1529 1298 : auto poCT = OGRCreateCoordinateTransformation(&oSrcSRSHoriz, poGeog);
1530 1298 : if (poCT)
1531 : {
1532 1298 : poCT->SetEmitErrors(false);
1533 :
1534 : double x[4], y[4];
1535 1298 : x[0] = adfGT[0];
1536 1298 : y[0] = adfGT[3];
1537 1298 : x[1] = adfGT[0] + nXSize * adfGT[1];
1538 1298 : y[1] = adfGT[3];
1539 1298 : x[2] = adfGT[0];
1540 1298 : y[2] = adfGT[3] + nYSize * adfGT[5];
1541 1298 : x[3] = x[1];
1542 1298 : y[3] = y[2];
1543 1298 : int validity[4] = {false, false, false, false};
1544 1298 : poCT->Transform(4, x, y, nullptr, validity);
1545 1298 : dfWestLongitudeDeg = std::numeric_limits<double>::max();
1546 1298 : dfSouthLatitudeDeg = std::numeric_limits<double>::max();
1547 1298 : dfEastLongitudeDeg = -std::numeric_limits<double>::max();
1548 1298 : dfNorthLatitudeDeg = -std::numeric_limits<double>::max();
1549 6490 : for (int i = 0; i < 4; i++)
1550 : {
1551 5192 : if (validity[i])
1552 : {
1553 5176 : ret = true;
1554 5176 : dfWestLongitudeDeg = std::min(dfWestLongitudeDeg, x[i]);
1555 5176 : dfSouthLatitudeDeg = std::min(dfSouthLatitudeDeg, y[i]);
1556 5176 : dfEastLongitudeDeg = std::max(dfEastLongitudeDeg, x[i]);
1557 5176 : dfNorthLatitudeDeg = std::max(dfNorthLatitudeDeg, y[i]);
1558 : }
1559 : }
1560 1298 : if (validity[0] && validity[1] && x[0] > x[1])
1561 : {
1562 3 : dfWestLongitudeDeg = x[0];
1563 3 : dfEastLongitudeDeg = x[1];
1564 : }
1565 1298 : if (ret && std::fabs(dfWestLongitudeDeg) <= 180 &&
1566 1291 : std::fabs(dfEastLongitudeDeg) <= 180 &&
1567 1287 : std::fabs(dfSouthLatitudeDeg) <= 90 &&
1568 1283 : std::fabs(dfNorthLatitudeDeg) <= 90)
1569 : {
1570 1283 : 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 1298 : OGRCoordinateTransformation::DestroyCT(poCT);
1583 : }
1584 :
1585 1298 : delete poGeog;
1586 : }
1587 :
1588 1298 : 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 41 : static void GDALGCPAntimeridianUnwrap(int nGCPCount, GDAL_GCP *pasGCPList,
1679 : const OGRSpatialReference &oSRS,
1680 : CSLConstList papszOptions)
1681 : {
1682 : const char *pszGCPAntimeridianUnwrap =
1683 41 : CSLFetchNameValueDef(papszOptions, "GCP_ANTIMERIDIAN_UNWRAP", "AUTO");
1684 122 : const bool bForced = EQUAL(pszGCPAntimeridianUnwrap, "YES") ||
1685 40 : EQUAL(pszGCPAntimeridianUnwrap, "ON") ||
1686 121 : EQUAL(pszGCPAntimeridianUnwrap, "TRUE") ||
1687 40 : EQUAL(pszGCPAntimeridianUnwrap, "1");
1688 47 : if (bForced || (!oSRS.IsEmpty() && oSRS.IsGeographic() &&
1689 6 : fabs(oSRS.GetAngularUnits(nullptr) -
1690 6 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-8 &&
1691 6 : EQUAL(pszGCPAntimeridianUnwrap, "AUTO")))
1692 : {
1693 6 : if (!bForced)
1694 : {
1695 : // Proceed to unwrapping only if the longitudes are within
1696 : // [-180, -170] or [170, 180]
1697 425 : for (int i = 0; i < nGCPCount; ++i)
1698 : {
1699 423 : const double dfLongAbs = fabs(pasGCPList[i].dfGCPX);
1700 423 : if (dfLongAbs > 180 || dfLongAbs < 170)
1701 : {
1702 3 : 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 1773 : 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 1773 : "</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 rought
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.
2087 : * </li>
2088 : * <li>GCP_ANTIMERIDIAN_UNWRAP=AUTO/YES/NO. (GDAL >= 3.8) Whether to
2089 : * "unwrap" longitudes of ground control points that span the antimeridian.
2090 : * For datasets with GCPs in longitude/latitude coordinate space spanning the
2091 : * antimeridian, longitudes will have a discontinuity on +/- 180 deg, and
2092 : * will result in a subset of the GCPs with longitude in the [-180,-170] range
2093 : * and another subset in [170, 180]. By default (AUTO), that situation will be
2094 : * detected and longitudes in [-180,-170] will be shifted to [180, 190] to get
2095 : * a continuous set. This option can be set to YES to force that behavior
2096 : * (useful if no SRS information is available), or to NO to disable it.
2097 : * </li>
2098 : * <li> SRC_METHOD: may have a value which is one of GEOTRANSFORM, GCP_HOMOGRAPHY,
2099 : * GCP_POLYNOMIAL, GCP_TPS, GEOLOC_ARRAY, RPC to force only one geolocation
2100 : * method to be considered on the source dataset. Will be used for pixel/line
2101 : * to georef transformation on the source dataset. NO_GEOTRANSFORM can be
2102 : * used to specify the identity geotransform (ungeoreferenced image)
2103 : * </li>
2104 : * <li> DST_METHOD: may have a value which is one of GEOTRANSFORM,
2105 : * GCP_POLYNOMIAL, GCP_HOMOGRAPHY, GCP_TPS, GEOLOC_ARRAY (added in 3.5), RPC to
2106 : * force only one
2107 : * geolocation method to be considered on the target dataset. Will be used for
2108 : * pixel/line to georef transformation on the destination dataset.
2109 : * NO_GEOTRANSFORM can be used to specify the identity geotransform
2110 : * (ungeoreferenced image)
2111 : * </li>
2112 : * <li> RPC_HEIGHT: A fixed height to be used with RPC
2113 : * calculations. If RPC_HEIGHT and RPC_DEM are not specified but that the RPC
2114 : * metadata domain contains a HEIGHT_DEFAULT item (for example, the DIMAP driver
2115 : * may fill it), this value will be used as the RPC_HEIGHT. Otherwise, if none
2116 : * of RPC_HEIGHT and RPC_DEM are specified as transformer
2117 : * options and if HEIGHT_DEFAULT is no available, a height of 0 will be used.
2118 : * </li>
2119 : * <li> RPC_DEM: The name of a DEM file to be used with RPC
2120 : * calculations. See GDALCreateRPCTransformerV2() for more details.
2121 : * </li>
2122 : * <li> Other RPC related options. See GDALCreateRPCTransformerV2()
2123 : * </li>
2124 : * <li>
2125 : * INSERT_CENTER_LONG: May be set to FALSE to disable setting up a CENTER_LONG
2126 : * value on the coordinate system to rewrap things around the center of the
2127 : * image.
2128 : * </li>
2129 : * <li> SRC_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL
2130 : * >= 2.2) Use an approximate transformer for the source transformer. Must be
2131 : * defined together with SRC_APPROX_ERROR_IN_PIXEL to be taken into account.
2132 : * </li>
2133 : * <li> SRC_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use
2134 : * an approximate transformer for the source transformer.. Must be defined
2135 : * together with SRC_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2136 : * </li>
2137 : * <li>
2138 : * DST_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL >= 2.2) Use
2139 : * an approximate transformer for the destination transformer. Must be defined
2140 : * together with DST_APPROX_ERROR_IN_PIXEL to be taken into account.
2141 : * </li>
2142 : * <li>
2143 : * DST_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use an
2144 : * approximate transformer for the destination transformer. Must be defined
2145 : * together with DST_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2146 : * </li>
2147 : * <li>
2148 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT=err_threshold_in_src_SRS_units.
2149 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2150 : * reprojection. Must be used together with
2151 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT to be taken into account.
2152 : * </li>
2153 : * <li>
2154 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT=err_threshold_in_dst_SRS_units.
2155 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2156 : * reprojection. Must be used together with
2157 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT to be taken into account.
2158 : * </li>
2159 : * <li>
2160 : * AREA_OF_INTEREST=west_lon_deg,south_lat_deg,east_lon_deg,north_lat_deg. (GDAL
2161 : * >= 3.0) Area of interest, used to compute the best coordinate operation
2162 : * between the source and target SRS. If not specified, the bounding box of the
2163 : * source raster will be used.
2164 : * </li>
2165 : * <li> GEOLOC_BACKMAP_OVERSAMPLE_FACTOR=[0.1,2]. (GDAL >= 3.5) Oversample
2166 : * factor used to derive the size of the "backmap" used for geolocation array
2167 : * transformers. Default value is 1.3.
2168 : * </li>
2169 : * <li> GEOLOC_USE_TEMP_DATASETS=YES/NO.
2170 : * (GDAL >= 3.5) Whether temporary GeoTIFF datasets should be used to store
2171 : * the backmap. The default is NO, that is to use in-memory arrays, unless the
2172 : * number of pixels of the geolocation array is greater than 16 megapixels.
2173 : * </li>
2174 : * <li>
2175 : * GEOLOC_ARRAY/SRC_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a GDAL
2176 : * dataset containing a geolocation array and associated metadata. This is an
2177 : * alternative to having geolocation information described in the GEOLOCATION
2178 : * metadata domain of the source dataset. The dataset specified may have a
2179 : * GEOLOCATION metadata domain containing appropriate metadata, however default
2180 : * values are assigned for all omitted items. X_BAND defaults to 1 and Y_BAND to
2181 : * 2, however the dataset must contain exactly 2 bands. PIXEL_OFFSET and
2182 : * LINE_OFFSET default to 0. PIXEL_STEP and LINE_STEP default to the ratio of
2183 : * the width/height of the source dataset divided by the with/height of the
2184 : * geolocation array. SRS defaults to the geolocation array dataset's spatial
2185 : * reference system if set, otherwise WGS84 is used.
2186 : * GEOREFERENCING_CONVENTION is selected from the main metadata domain if it
2187 : * is omitted from the GEOLOCATION domain, and if not available
2188 : * TOP_LEFT_CORNER is assigned as a default.
2189 : * If GEOLOC_ARRAY is set SRC_METHOD
2190 : * defaults to GEOLOC_ARRAY.
2191 : * </li>
2192 : * <li>DST_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a
2193 : * GDAL dataset that contains at least 2 bands with the X and Y geolocation
2194 : * bands. This is an alternative to having geolocation information described in
2195 : * the GEOLOCATION metadata domain of the destination dataset. See
2196 : * SRC_GEOLOC_ARRAY description for details, assumptions, and defaults. If this
2197 : * option is set, DST_METHOD=GEOLOC_ARRAY will be assumed if not set.
2198 : * </li>
2199 : * <li>GEOLOC_NORMALIZE_LONGITUDE_MINUS_180_PLUS_180=YES/NO. (GDAL >= 3.12.0)
2200 : * Whether to force geolocation longitudes into -180,180 when longitude/latitude is
2201 : * the coordinate system of the geolocation arrays. The default is to enable this mode
2202 : * when the values in the geolocation array are in the -180,180, otherwise NO.
2203 : * </li>
2204 : * </ul>
2205 : *
2206 : * The use case for the *_APPROX_ERROR_* options is when defining an approximate
2207 : * transformer on top of the GenImgProjTransformer globally is not practical.
2208 : * Such a use case is when the source dataset has RPC with a RPC DEM. In such
2209 : * case we don't want to use the approximate transformer on the RPC
2210 : * transformation, as the RPC DEM generally involves non-linearities that the
2211 : * approximate transformer will not detect. In such case, we must a
2212 : * non-approximated GenImgProjTransformer, but it might be worthwhile to use
2213 : * approximate sub- transformers, for example on coordinate reprojection. For
2214 : * example if warping from a source dataset with RPC to a destination dataset
2215 : * with a UTM projection, since the inverse UTM transformation is rather costly.
2216 : * In which case, one can use the REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT and
2217 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT options.
2218 : *
2219 : * The list of supported options can also be programmatically obtained with
2220 : * GDALGetGenImgProjTranformerOptionList().
2221 : *
2222 : * @param hSrcDS source dataset, or NULL.
2223 : * @param hDstDS destination dataset (or NULL).
2224 : * @param papszOptions NULL-terminated list of string options (or NULL).
2225 : *
2226 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2227 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2228 : */
2229 : /* clang-format on */
2230 :
2231 1772 : void *GDALCreateGenImgProjTransformer2(GDALDatasetH hSrcDS, GDALDatasetH hDstDS,
2232 : CSLConstList papszOptions)
2233 :
2234 : {
2235 1772 : GDALValidateOptions(GDALGetGenImgProjTranformerOptionList(), papszOptions,
2236 : "option", "transformer options");
2237 :
2238 1772 : double dfWestLongitudeDeg = 0.0;
2239 1772 : double dfSouthLatitudeDeg = 0.0;
2240 1772 : double dfEastLongitudeDeg = 0.0;
2241 1772 : double dfNorthLatitudeDeg = 0.0;
2242 1772 : bool bHasAreaOfInterest = false;
2243 1772 : if (const char *pszAreaOfInterest =
2244 1772 : CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST"))
2245 : {
2246 : const CPLStringList aosTokens(
2247 0 : CSLTokenizeString2(pszAreaOfInterest, ", ", 0));
2248 0 : if (aosTokens.size() == 4)
2249 : {
2250 0 : dfWestLongitudeDeg = CPLAtof(aosTokens[0]);
2251 0 : dfSouthLatitudeDeg = CPLAtof(aosTokens[1]);
2252 0 : dfEastLongitudeDeg = CPLAtof(aosTokens[2]);
2253 0 : dfNorthLatitudeDeg = CPLAtof(aosTokens[3]);
2254 0 : bHasAreaOfInterest = true;
2255 : }
2256 : }
2257 :
2258 1772 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
2259 :
2260 : const auto SetAxisMapping =
2261 3919 : [papszOptions](OGRSpatialReference &oSRS, const char *pszPrefix)
2262 : {
2263 1307 : const char *pszMapping = CSLFetchNameValue(
2264 2614 : papszOptions, std::string(pszPrefix)
2265 1307 : .append("_DATA_AXIS_TO_SRS_AXIS_MAPPING")
2266 : .c_str());
2267 1307 : if (pszMapping)
2268 : {
2269 4 : CPLStringList aosTokens(CSLTokenizeString2(pszMapping, ",", 0));
2270 4 : std::vector<int> anMapping;
2271 6 : for (int i = 0; i < aosTokens.size(); ++i)
2272 4 : anMapping.push_back(atoi(aosTokens[i]));
2273 2 : oSRS.SetDataAxisToSRSAxisMapping(anMapping);
2274 : }
2275 : else
2276 : {
2277 1305 : const char *pszStrategy = CSLFetchNameValueDef(
2278 : papszOptions,
2279 2610 : std::string(pszPrefix).append("_AXIS_MAPPING_STRATEGY").c_str(),
2280 : "TRADITIONAL_GIS_ORDER");
2281 1305 : if (EQUAL(pszStrategy, "TRADITIONAL_GIS_ORDER"))
2282 1304 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2283 1 : else if (EQUAL(pszStrategy, "AUTHORITY_COMPLIANT"))
2284 1 : oSRS.SetAxisMappingStrategy(OAMS_AUTHORITY_COMPLIANT);
2285 : else
2286 : {
2287 0 : CPLError(CE_Warning, CPLE_AppDefined,
2288 : "Unrecognized value '%s' for %s", pszStrategy,
2289 0 : std::string(pszPrefix)
2290 0 : .append("_AXIS_MAPPING_STRATEGY")
2291 : .c_str());
2292 0 : return false;
2293 : }
2294 : }
2295 1307 : return true;
2296 1772 : };
2297 :
2298 : /* -------------------------------------------------------------------- */
2299 : /* Initialize the transform info. */
2300 : /* -------------------------------------------------------------------- */
2301 : GDALGenImgProjTransformInfo *psInfo =
2302 1772 : GDALCreateGenImgProjTransformerInternal();
2303 :
2304 : const auto DealWithForwardOrInverse =
2305 3530 : [bHasAreaOfInterest, &dfWestLongitudeDeg, &dfSouthLatitudeDeg,
2306 : &dfEastLongitudeDeg, &dfNorthLatitudeDeg, pszCO, papszOptions,
2307 : &SetAxisMapping](GDALGenImgProjTransformPart &part, GDALDatasetH hDS,
2308 : const char *pszPrefix, OGRSpatialReference &oSRS,
2309 34335 : bool &bCanUseGeoTransform)
2310 : {
2311 : const int nOrder =
2312 3530 : atoi(CSLFetchNameValueDef(papszOptions, "MAX_GCP_ORDER", "0"));
2313 :
2314 : const bool bGCPUseOK =
2315 3530 : CPLTestBool(CSLFetchNameValueDef(papszOptions, "GCPS_OK", "YES"));
2316 3530 : const int nMinimumGcps = atoi(
2317 : CSLFetchNameValueDef(papszOptions, "REFINE_MINIMUM_GCPS", "-1"));
2318 :
2319 : const char *pszRefineTolerance =
2320 3530 : CSLFetchNameValue(papszOptions, "REFINE_TOLERANCE");
2321 3530 : const bool bRefine = pszRefineTolerance != nullptr;
2322 : const double dfTolerance =
2323 3530 : pszRefineTolerance ? CPLAtof(pszRefineTolerance) : 0.0;
2324 :
2325 : const std::string osSRSOptionName =
2326 10590 : std::string(pszPrefix).append("_SRS");
2327 : const char *pszSRS =
2328 3530 : CSLFetchNameValue(papszOptions, osSRSOptionName.c_str());
2329 3530 : if (pszSRS)
2330 : {
2331 2610 : if (pszSRS[0] != '\0' &&
2332 1303 : oSRS.SetFromUserInput(pszSRS) != OGRERR_NONE)
2333 : {
2334 0 : CPLError(CE_Failure, CPLE_AppDefined,
2335 : "Failed to import coordinate system `%s'.", pszSRS);
2336 0 : return false;
2337 : }
2338 1307 : if (!SetAxisMapping(oSRS, osSRSOptionName.c_str()))
2339 0 : return false;
2340 : }
2341 :
2342 3530 : CSLConstList papszMD = nullptr;
2343 : GDALRPCInfoV2 sRPCInfo;
2344 :
2345 3530 : bCanUseGeoTransform = false;
2346 :
2347 3530 : const char *pszMethod = CSLFetchNameValue(
2348 7060 : papszOptions, std::string(pszPrefix).append("_METHOD").c_str());
2349 3530 : if (!pszMethod && EQUAL(pszPrefix, "SRC"))
2350 1735 : pszMethod = CSLFetchNameValue(papszOptions, "METHOD");
2351 :
2352 3530 : const char *pszGeolocArray = CSLFetchNameValue(
2353 : papszOptions,
2354 7060 : std::string(pszPrefix).append("_GEOLOC_ARRAY").c_str());
2355 3530 : if (!pszGeolocArray && EQUAL(pszPrefix, "SRC"))
2356 1771 : pszGeolocArray = CSLFetchNameValue(papszOptions, "GEOLOC_ARRAY");
2357 3530 : if (!pszMethod && pszGeolocArray != nullptr)
2358 9 : pszMethod = "GEOLOC_ARRAY";
2359 :
2360 : /* -------------------------------------------------------------------- */
2361 : /* Get forward and inverse geotransform for the source image. */
2362 : /* -------------------------------------------------------------------- */
2363 3530 : if (hDS == nullptr ||
2364 91 : (pszMethod != nullptr && EQUAL(pszMethod, "NO_GEOTRANSFORM")))
2365 : {
2366 1400 : part.adfGeoTransform[0] = 0.0;
2367 1400 : part.adfGeoTransform[1] = 1.0;
2368 1400 : part.adfGeoTransform[2] = 0.0;
2369 1400 : part.adfGeoTransform[3] = 0.0;
2370 1400 : part.adfGeoTransform[4] = 0.0;
2371 1400 : part.adfGeoTransform[5] = 1.0;
2372 1400 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2373 : sizeof(double) * 6);
2374 : }
2375 4193 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOTRANSFORM")) &&
2376 2063 : GDALGetGeoTransform(hDS, part.adfGeoTransform) == CE_None)
2377 : {
2378 1983 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2379 1983 : part.adfInvGeoTransform))
2380 : {
2381 0 : CPLError(CE_Failure, CPLE_AppDefined,
2382 : "Cannot invert geotransform");
2383 0 : return false;
2384 : }
2385 1983 : if (pszSRS == nullptr)
2386 : {
2387 1757 : auto hSRS = GDALGetSpatialRef(hDS);
2388 1757 : if (hSRS)
2389 1420 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2390 : }
2391 1983 : if (EQUAL(pszPrefix, "SRC"))
2392 : {
2393 1517 : if (!bHasAreaOfInterest && pszCO == nullptr && !oSRS.IsEmpty())
2394 : {
2395 1282 : GDALComputeAreaOfInterest(
2396 1282 : &oSRS, part.adfGeoTransform, GDALGetRasterXSize(hDS),
2397 : GDALGetRasterYSize(hDS), dfWestLongitudeDeg,
2398 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2399 : dfNorthLatitudeDeg);
2400 : }
2401 1517 : bCanUseGeoTransform = true;
2402 : }
2403 : }
2404 147 : else if (bGCPUseOK &&
2405 80 : ((pszMethod == nullptr && GDALGetGCPCount(hDS) >= 4 &&
2406 147 : GDALGetGCPCount(hDS) < 6) ||
2407 67 : (pszMethod != nullptr &&
2408 295 : EQUAL(pszMethod, "GCP_HOMOGRAPHY"))) &&
2409 22 : GDALGetGCPCount(hDS) > 0)
2410 : {
2411 22 : if (pszSRS == nullptr)
2412 : {
2413 21 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2414 21 : if (hSRS)
2415 21 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2416 : }
2417 :
2418 22 : const auto nGCPCount = GDALGetGCPCount(hDS);
2419 22 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2420 22 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2421 : papszOptions);
2422 :
2423 22 : part.pTransformArg =
2424 22 : GDALCreateHomographyTransformerFromGCPs(nGCPCount, pasGCPList);
2425 :
2426 22 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2427 22 : CPLFree(pasGCPList);
2428 :
2429 22 : if (part.pTransformArg == nullptr)
2430 : {
2431 0 : return false;
2432 : }
2433 22 : part.pTransformer = GDALHomographyTransform;
2434 : }
2435 125 : else if (bGCPUseOK &&
2436 66 : (pszMethod == nullptr || EQUAL(pszMethod, "GCP_POLYNOMIAL")) &&
2437 250 : GDALGetGCPCount(hDS) > 0 && nOrder >= 0)
2438 : {
2439 8 : if (pszSRS == nullptr)
2440 : {
2441 8 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2442 8 : if (hSRS)
2443 8 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2444 : }
2445 :
2446 8 : const auto nGCPCount = GDALGetGCPCount(hDS);
2447 8 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2448 8 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2449 : papszOptions);
2450 :
2451 8 : if (bRefine)
2452 : {
2453 0 : part.pTransformArg = GDALCreateGCPRefineTransformer(
2454 : nGCPCount, pasGCPList, nOrder, FALSE, dfTolerance,
2455 : nMinimumGcps);
2456 : }
2457 : else
2458 : {
2459 8 : part.pTransformArg = GDALCreateGCPTransformer(
2460 : nGCPCount, pasGCPList, nOrder, FALSE);
2461 : }
2462 :
2463 8 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2464 8 : CPLFree(pasGCPList);
2465 :
2466 8 : if (part.pTransformArg == nullptr)
2467 : {
2468 0 : return false;
2469 : }
2470 8 : part.pTransformer = GDALGCPTransform;
2471 : }
2472 :
2473 128 : else if (bGCPUseOK && GDALGetGCPCount(hDS) > 0 && nOrder <= 0 &&
2474 11 : (pszMethod == nullptr || EQUAL(pszMethod, "GCP_TPS")))
2475 : {
2476 11 : if (pszSRS == nullptr)
2477 : {
2478 11 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2479 11 : if (hSRS)
2480 10 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2481 : }
2482 :
2483 11 : const auto nGCPCount = GDALGetGCPCount(hDS);
2484 11 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2485 11 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2486 : papszOptions);
2487 :
2488 11 : part.pTransformArg = GDALCreateTPSTransformerInt(
2489 : nGCPCount, pasGCPList, FALSE, papszOptions);
2490 :
2491 11 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2492 11 : CPLFree(pasGCPList);
2493 :
2494 11 : if (part.pTransformArg == nullptr)
2495 : {
2496 2 : return false;
2497 : }
2498 9 : part.pTransformer = GDALTPSTransform;
2499 : }
2500 :
2501 52 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "RPC")) &&
2502 204 : (papszMD = GDALGetMetadata(hDS, "RPC")) != nullptr &&
2503 46 : GDALExtractRPCInfoV2(papszMD, &sRPCInfo))
2504 : {
2505 46 : CPLStringList aosOptions(papszOptions);
2506 87 : if (!CSLFetchNameValue(papszOptions, "RPC_HEIGHT") &&
2507 41 : !CSLFetchNameValue(papszOptions, "RPC_DEM"))
2508 : {
2509 8 : if (const char *pszHEIGHT_DEFAULT =
2510 8 : CSLFetchNameValue(papszMD, "HEIGHT_DEFAULT"))
2511 : {
2512 1 : CPLDebug("GDAL",
2513 : "For %s, using RPC_HEIGHT = HEIGHT_DEFAULT = %s",
2514 : pszPrefix, pszHEIGHT_DEFAULT);
2515 1 : aosOptions.SetNameValue("RPC_HEIGHT", pszHEIGHT_DEFAULT);
2516 : }
2517 : }
2518 46 : part.pTransformArg = GDALCreateRPCTransformerV2(&sRPCInfo, FALSE, 0,
2519 46 : aosOptions.List());
2520 46 : if (part.pTransformArg == nullptr)
2521 : {
2522 1 : return false;
2523 : }
2524 45 : part.pTransformer = GDALRPCTransform;
2525 45 : if (pszSRS == nullptr)
2526 : {
2527 45 : oSRS.SetFromUserInput(SRS_WKT_WGS84_LAT_LONG);
2528 45 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2529 : }
2530 : }
2531 :
2532 119 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOLOC_ARRAY")) &&
2533 59 : ((papszMD = GDALGetMetadata(hDS, "GEOLOCATION")) != nullptr ||
2534 : pszGeolocArray != nullptr))
2535 : {
2536 52 : CPLStringList aosGeolocMD; // keep in this scope
2537 52 : if (pszGeolocArray != nullptr)
2538 : {
2539 9 : if (papszMD != nullptr)
2540 : {
2541 0 : CPLError(
2542 : CE_Warning, CPLE_AppDefined,
2543 : "Both GEOLOCATION metadata domain on the source "
2544 : "dataset "
2545 : "and [%s_]GEOLOC_ARRAY transformer option are set. "
2546 : "Only using the later.",
2547 : pszPrefix);
2548 : }
2549 9 : aosGeolocMD = GDALCreateGeolocationMetadata(
2550 : hDS, pszGeolocArray,
2551 9 : /* bIsSource= */ EQUAL(pszPrefix, "SRC"));
2552 9 : if (aosGeolocMD.empty())
2553 : {
2554 3 : return false;
2555 : }
2556 6 : papszMD = aosGeolocMD.List();
2557 : }
2558 :
2559 49 : part.pTransformArg = GDALCreateGeoLocTransformerEx(
2560 : hDS, papszMD, FALSE, nullptr, papszOptions);
2561 49 : if (part.pTransformArg == nullptr)
2562 : {
2563 2 : return false;
2564 : }
2565 47 : part.pTransformer = GDALGeoLocTransform;
2566 47 : if (pszSRS == nullptr)
2567 : {
2568 47 : pszSRS = CSLFetchNameValue(papszMD, "SRS");
2569 47 : if (pszSRS)
2570 : {
2571 45 : oSRS.SetFromUserInput(pszSRS);
2572 45 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2573 : }
2574 : }
2575 : }
2576 :
2577 8 : else if (pszMethod != nullptr && EQUAL(pszPrefix, "SRC"))
2578 : {
2579 1 : CPLError(CE_Failure, CPLE_AppDefined,
2580 : "Unable to compute a %s based transformation between "
2581 : "pixel/line and georeferenced coordinates for %s.",
2582 : pszMethod, GDALGetDescription(hDS));
2583 :
2584 1 : return false;
2585 : }
2586 :
2587 : else
2588 : {
2589 7 : CPLError(CE_Failure, CPLE_AppDefined,
2590 : "Unable to compute a transformation between pixel/line "
2591 : "and georeferenced coordinates for %s. "
2592 : "There is no affine transformation and no GCPs. "
2593 : "Specify transformation option %s_METHOD=NO_GEOTRANSFORM "
2594 : "to bypass this check.",
2595 : GDALGetDescription(hDS), pszPrefix);
2596 :
2597 7 : return false;
2598 : }
2599 :
2600 : /* ---------------------------------------------------------------- */
2601 : /* Handle optional source approximation transformer. */
2602 : /* ---------------------------------------------------------------- */
2603 3514 : if (part.pTransformer)
2604 : {
2605 131 : const char *pszApproxErrorFwd = CSLFetchNameValue(
2606 262 : papszOptions, std::string(pszPrefix)
2607 131 : .append("_APPROX_ERROR_IN_SRS_UNIT")
2608 : .c_str());
2609 131 : const char *pszApproxErrorReverse = CSLFetchNameValue(
2610 262 : papszOptions, std::string(pszPrefix)
2611 131 : .append("_APPROX_ERROR_IN_PIXEL")
2612 : .c_str());
2613 131 : if (pszApproxErrorFwd && pszApproxErrorReverse)
2614 : {
2615 1 : void *pArg = GDALCreateApproxTransformer2(
2616 : part.pTransformer, part.pTransformArg,
2617 : CPLAtof(pszApproxErrorFwd), CPLAtof(pszApproxErrorReverse));
2618 1 : if (pArg == nullptr)
2619 : {
2620 0 : return false;
2621 : }
2622 1 : part.pTransformArg = pArg;
2623 1 : part.pTransformer = GDALApproxTransform;
2624 1 : GDALApproxTransformerOwnsSubtransformer(part.pTransformArg,
2625 : TRUE);
2626 : }
2627 : }
2628 :
2629 3514 : return true;
2630 1772 : };
2631 :
2632 : /* -------------------------------------------------------------------- */
2633 : /* Get forward and inverse geotransform for the source image. */
2634 : /* -------------------------------------------------------------------- */
2635 1772 : bool bCanUseSrcGeoTransform = false;
2636 3544 : OGRSpatialReference oSrcSRS;
2637 1772 : if (!DealWithForwardOrInverse(psInfo->sSrcParams, hSrcDS, "SRC", oSrcSRS,
2638 : bCanUseSrcGeoTransform))
2639 : {
2640 14 : GDALDestroyGenImgProjTransformer(psInfo);
2641 14 : return nullptr;
2642 : }
2643 :
2644 : /* -------------------------------------------------------------------- */
2645 : /* Get forward and inverse geotransform for destination image. */
2646 : /* If we have no destination use a unit transform. */
2647 : /* -------------------------------------------------------------------- */
2648 1758 : bool bIgnored = false;
2649 3516 : OGRSpatialReference oDstSRS;
2650 1758 : if (!DealWithForwardOrInverse(psInfo->sDstParams, hDstDS, "DST", oDstSRS,
2651 : bIgnored))
2652 : {
2653 2 : GDALDestroyGenImgProjTransformer(psInfo);
2654 2 : return nullptr;
2655 : }
2656 :
2657 : /* -------------------------------------------------------------------- */
2658 : /* Setup reprojection. */
2659 : /* -------------------------------------------------------------------- */
2660 :
2661 1756 : if (CPLFetchBool(papszOptions, "STRIP_VERT_CS", false))
2662 : {
2663 0 : if (oSrcSRS.IsCompound())
2664 : {
2665 0 : oSrcSRS.StripVertical();
2666 : }
2667 0 : if (oDstSRS.IsCompound())
2668 : {
2669 0 : oDstSRS.StripVertical();
2670 : }
2671 : }
2672 :
2673 : const bool bMayInsertCenterLong =
2674 3040 : (bCanUseSrcGeoTransform && !oSrcSRS.IsEmpty() && hSrcDS &&
2675 1284 : CPLFetchBool(papszOptions, "INSERT_CENTER_LONG", true));
2676 : const char *pszSrcCoordEpoch =
2677 1756 : CSLFetchNameValue(papszOptions, "SRC_COORDINATE_EPOCH");
2678 : const char *pszDstCoordEpoch =
2679 1756 : CSLFetchNameValue(papszOptions, "DST_COORDINATE_EPOCH");
2680 3205 : if ((!oSrcSRS.IsEmpty() && !oDstSRS.IsEmpty() &&
2681 1335 : (pszSrcCoordEpoch || pszDstCoordEpoch || !oSrcSRS.IsSame(&oDstSRS) ||
2682 3205 : (oSrcSRS.IsGeographic() && bMayInsertCenterLong))) ||
2683 : pszCO)
2684 : {
2685 952 : CPLStringList aosOptions;
2686 :
2687 952 : if (bMayInsertCenterLong)
2688 : {
2689 935 : InsertCenterLong(hSrcDS, &oSrcSRS, &oDstSRS,
2690 : CSLFetchNameValue(papszOptions, "TARGET_EXTENT"),
2691 : aosOptions);
2692 : }
2693 :
2694 952 : if (CPLFetchBool(papszOptions, "PROMOTE_TO_3D", false))
2695 : {
2696 19 : oSrcSRS.PromoteTo3D(nullptr);
2697 19 : oDstSRS.PromoteTo3D(nullptr);
2698 : }
2699 :
2700 952 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
2701 32 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
2702 : {
2703 : aosOptions.SetNameValue(
2704 : "AREA_OF_INTEREST",
2705 : CPLSPrintf("%.16g,%.16g,%.16g,%.16g", dfWestLongitudeDeg,
2706 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2707 920 : dfNorthLatitudeDeg));
2708 : }
2709 952 : if (pszCO)
2710 : {
2711 7 : aosOptions.SetNameValue("COORDINATE_OPERATION", pszCO);
2712 : }
2713 :
2714 : const char *pszCoordEpoch =
2715 952 : CSLFetchNameValue(papszOptions, "COORDINATE_EPOCH");
2716 952 : if (pszCoordEpoch)
2717 : {
2718 1 : aosOptions.SetNameValue("COORDINATE_EPOCH", pszCoordEpoch);
2719 : }
2720 :
2721 952 : if (pszSrcCoordEpoch)
2722 : {
2723 0 : aosOptions.SetNameValue("SRC_COORDINATE_EPOCH", pszSrcCoordEpoch);
2724 0 : oSrcSRS.SetCoordinateEpoch(CPLAtof(pszSrcCoordEpoch));
2725 : }
2726 :
2727 952 : if (pszDstCoordEpoch)
2728 : {
2729 0 : aosOptions.SetNameValue("DST_COORDINATE_EPOCH", pszDstCoordEpoch);
2730 0 : oDstSRS.SetCoordinateEpoch(CPLAtof(pszDstCoordEpoch));
2731 : }
2732 :
2733 952 : if (const char *pszAllowBallpark =
2734 952 : CSLFetchNameValue(papszOptions, "ALLOW_BALLPARK"))
2735 : {
2736 2 : aosOptions.SetNameValue("ALLOW_BALLPARK", pszAllowBallpark);
2737 : }
2738 :
2739 952 : if (const char *pszOnlyBest =
2740 952 : CSLFetchNameValue(papszOptions, "ONLY_BEST"))
2741 : {
2742 1 : aosOptions.SetNameValue("ONLY_BEST", pszOnlyBest);
2743 : }
2744 :
2745 956 : psInfo->pReprojectArg = GDALCreateReprojectionTransformerEx(
2746 952 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS)
2747 : : nullptr,
2748 952 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS)
2749 : : nullptr,
2750 952 : aosOptions.List());
2751 :
2752 952 : if (pszCO)
2753 : {
2754 7 : psInfo->bHasCustomTransformationPipeline = true;
2755 : }
2756 :
2757 952 : if (psInfo->pReprojectArg == nullptr)
2758 : {
2759 5 : GDALDestroyGenImgProjTransformer(psInfo);
2760 5 : return nullptr;
2761 : }
2762 947 : psInfo->pReproject = GDALReprojectionTransform;
2763 :
2764 : /* --------------------------------------------------------------------
2765 : */
2766 : /* Handle optional reprojection approximation transformer. */
2767 : /* --------------------------------------------------------------------
2768 : */
2769 947 : const char *psApproxErrorFwd = CSLFetchNameValue(
2770 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT");
2771 947 : const char *psApproxErrorReverse = CSLFetchNameValue(
2772 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT");
2773 947 : if (psApproxErrorFwd && psApproxErrorReverse)
2774 : {
2775 1 : void *pArg = GDALCreateApproxTransformer2(
2776 : psInfo->pReproject, psInfo->pReprojectArg,
2777 : CPLAtof(psApproxErrorFwd), CPLAtof(psApproxErrorReverse));
2778 1 : if (pArg == nullptr)
2779 : {
2780 0 : GDALDestroyGenImgProjTransformer(psInfo);
2781 0 : return nullptr;
2782 : }
2783 1 : psInfo->pReprojectArg = pArg;
2784 1 : psInfo->pReproject = GDALApproxTransform;
2785 1 : GDALApproxTransformerOwnsSubtransformer(psInfo->pReprojectArg,
2786 : TRUE);
2787 : }
2788 : }
2789 :
2790 1751 : return psInfo;
2791 : }
2792 :
2793 : /************************************************************************/
2794 : /* GDALRefreshGenImgProjTransformer() */
2795 : /************************************************************************/
2796 :
2797 1169 : void GDALRefreshGenImgProjTransformer(void *hTransformArg)
2798 : {
2799 1169 : GDALGenImgProjTransformInfo *psInfo =
2800 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
2801 :
2802 1952 : if (psInfo->pReprojectArg &&
2803 783 : psInfo->bCheckWithInvertPROJ != GetCurrentCheckWithInvertPROJ())
2804 : {
2805 69 : psInfo->bCheckWithInvertPROJ = !psInfo->bCheckWithInvertPROJ;
2806 :
2807 : CPLXMLNode *psXML =
2808 69 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
2809 69 : GDALDestroyTransformer(psInfo->pReprojectArg);
2810 69 : GDALDeserializeTransformer(psXML, &psInfo->pReproject,
2811 : &psInfo->pReprojectArg);
2812 69 : CPLDestroyXMLNode(psXML);
2813 : }
2814 1169 : }
2815 :
2816 : /************************************************************************/
2817 : /* GDALCreateGenImgProjTransformer3() */
2818 : /************************************************************************/
2819 :
2820 : /**
2821 : * Create image to image transformer.
2822 : *
2823 : * This function creates a transformation object that maps from pixel/line
2824 : * coordinates on one image to pixel/line coordinates on another image. The
2825 : * images may potentially be georeferenced in different coordinate systems,
2826 : * and may used GCPs to map between their pixel/line coordinates and
2827 : * georeferenced coordinates (as opposed to the default assumption that their
2828 : * geotransform should be used).
2829 : *
2830 : * This transformer potentially performs three concatenated transformations.
2831 : *
2832 : * The first stage is from source image pixel/line coordinates to source
2833 : * image georeferenced coordinates, and may be done using the geotransform,
2834 : * or if not defined using a polynomial model derived from GCPs. If GCPs
2835 : * are used this stage is accomplished using GDALGCPTransform().
2836 : *
2837 : * The second stage is to change projections from the source coordinate system
2838 : * to the destination coordinate system, assuming they differ. This is
2839 : * accomplished internally using GDALReprojectionTransform().
2840 : *
2841 : * The third stage is converting from destination image georeferenced
2842 : * coordinates to destination image coordinates. This is done using the
2843 : * destination image geotransform, or if not available, using a polynomial
2844 : * model derived from GCPs. If GCPs are used this stage is accomplished using
2845 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
2846 : * transformation is created.
2847 : *
2848 : * @param pszSrcWKT source WKT (or NULL).
2849 : * @param padfSrcGeoTransform source geotransform (or NULL).
2850 : * @param pszDstWKT destination WKT (or NULL).
2851 : * @param padfDstGeoTransform destination geotransform (or NULL).
2852 : *
2853 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2854 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2855 : */
2856 :
2857 0 : void *GDALCreateGenImgProjTransformer3(const char *pszSrcWKT,
2858 : const double *padfSrcGeoTransform,
2859 : const char *pszDstWKT,
2860 : const double *padfDstGeoTransform)
2861 :
2862 : {
2863 0 : OGRSpatialReference oSrcSRS;
2864 0 : if (pszSrcWKT)
2865 : {
2866 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2867 0 : if (pszSrcWKT[0] != '\0' &&
2868 0 : oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
2869 : {
2870 0 : CPLError(CE_Failure, CPLE_AppDefined,
2871 : "Failed to import coordinate system `%s'.", pszSrcWKT);
2872 0 : return nullptr;
2873 : }
2874 : }
2875 :
2876 0 : OGRSpatialReference oDstSRS;
2877 0 : if (pszDstWKT)
2878 : {
2879 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2880 0 : if (pszDstWKT[0] != '\0' &&
2881 0 : oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
2882 : {
2883 0 : CPLError(CE_Failure, CPLE_AppDefined,
2884 : "Failed to import coordinate system `%s'.", pszDstWKT);
2885 0 : return nullptr;
2886 : }
2887 : }
2888 0 : return GDALCreateGenImgProjTransformer4(
2889 : OGRSpatialReference::ToHandle(&oSrcSRS), padfSrcGeoTransform,
2890 0 : OGRSpatialReference::ToHandle(&oDstSRS), padfDstGeoTransform, nullptr);
2891 : }
2892 :
2893 : /************************************************************************/
2894 : /* GDALCreateGenImgProjTransformer4() */
2895 : /************************************************************************/
2896 :
2897 : /**
2898 : * Create image to image transformer.
2899 : *
2900 : * Similar to GDALCreateGenImgProjTransformer3(), except that it takes
2901 : * OGRSpatialReferenceH objects and options.
2902 : * The options are the ones supported by GDALCreateReprojectionTransformerEx()
2903 : *
2904 : * @since GDAL 3.0
2905 : */
2906 16 : void *GDALCreateGenImgProjTransformer4(OGRSpatialReferenceH hSrcSRS,
2907 : const double *padfSrcGeoTransform,
2908 : OGRSpatialReferenceH hDstSRS,
2909 : const double *padfDstGeoTransform,
2910 : const char *const *papszOptions)
2911 : {
2912 : /* -------------------------------------------------------------------- */
2913 : /* Initialize the transform info. */
2914 : /* -------------------------------------------------------------------- */
2915 : GDALGenImgProjTransformInfo *psInfo =
2916 16 : GDALCreateGenImgProjTransformerInternal();
2917 :
2918 : /* -------------------------------------------------------------------- */
2919 : /* Get forward and inverse geotransform for the source image. */
2920 : /* -------------------------------------------------------------------- */
2921 :
2922 : const auto SetParams =
2923 30 : [](GDALGenImgProjTransformPart &part, const double *padfGT)
2924 : {
2925 30 : if (padfGT)
2926 : {
2927 30 : memcpy(part.adfGeoTransform, padfGT, sizeof(part.adfGeoTransform));
2928 30 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2929 30 : part.adfInvGeoTransform))
2930 : {
2931 2 : CPLError(CE_Failure, CPLE_AppDefined,
2932 : "Cannot invert geotransform");
2933 2 : return false;
2934 : }
2935 : }
2936 : else
2937 : {
2938 0 : part.adfGeoTransform[0] = 0.0;
2939 0 : part.adfGeoTransform[1] = 1.0;
2940 0 : part.adfGeoTransform[2] = 0.0;
2941 0 : part.adfGeoTransform[3] = 0.0;
2942 0 : part.adfGeoTransform[4] = 0.0;
2943 0 : part.adfGeoTransform[5] = 1.0;
2944 0 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2945 : sizeof(double) * 6);
2946 : }
2947 28 : return true;
2948 : };
2949 :
2950 16 : if (!SetParams(psInfo->sSrcParams, padfSrcGeoTransform))
2951 : {
2952 1 : GDALDestroyGenImgProjTransformer(psInfo);
2953 1 : return nullptr;
2954 : }
2955 :
2956 : /* -------------------------------------------------------------------- */
2957 : /* Setup reprojection. */
2958 : /* -------------------------------------------------------------------- */
2959 15 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
2960 15 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
2961 30 : if (!poSrcSRS->IsEmpty() && !poDstSRS->IsEmpty() &&
2962 15 : !poSrcSRS->IsSame(poDstSRS))
2963 : {
2964 4 : psInfo->pReprojectArg =
2965 4 : GDALCreateReprojectionTransformerEx(hSrcSRS, hDstSRS, papszOptions);
2966 4 : if (psInfo->pReprojectArg == nullptr)
2967 : {
2968 1 : GDALDestroyGenImgProjTransformer(psInfo);
2969 1 : return nullptr;
2970 : }
2971 3 : psInfo->pReproject = GDALReprojectionTransform;
2972 : }
2973 :
2974 : /* -------------------------------------------------------------------- */
2975 : /* Get forward and inverse geotransform for destination image. */
2976 : /* If we have no destination matrix use a unit transform. */
2977 : /* -------------------------------------------------------------------- */
2978 14 : if (!SetParams(psInfo->sDstParams, padfDstGeoTransform))
2979 : {
2980 1 : GDALDestroyGenImgProjTransformer(psInfo);
2981 1 : return nullptr;
2982 : }
2983 :
2984 13 : return psInfo;
2985 : }
2986 :
2987 : /************************************************************************/
2988 : /* GDALSetGenImgProjTransformerDstGeoTransform() */
2989 : /************************************************************************/
2990 :
2991 : /**
2992 : * Set GenImgProj output geotransform.
2993 : *
2994 : * Normally the "destination geotransform", or transformation between
2995 : * georeferenced output coordinates and pixel/line coordinates on the
2996 : * destination file is extracted from the destination file by
2997 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
2998 : * info. However, sometimes it is inconvenient to have an output file
2999 : * handle with appropriate geotransform information when creating the
3000 : * transformation. For these cases, this function can be used to apply
3001 : * the destination geotransform.
3002 : *
3003 : * @param hTransformArg the handle to update.
3004 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
3005 : */
3006 :
3007 903 : void GDALSetGenImgProjTransformerDstGeoTransform(void *hTransformArg,
3008 : const double *padfGeoTransform)
3009 :
3010 : {
3011 903 : VALIDATE_POINTER0(hTransformArg,
3012 : "GDALSetGenImgProjTransformerDstGeoTransform");
3013 :
3014 903 : GDALGenImgProjTransformInfo *psInfo =
3015 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3016 :
3017 903 : memcpy(psInfo->sDstParams.adfGeoTransform, padfGeoTransform,
3018 : sizeof(double) * 6);
3019 903 : if (!GDALInvGeoTransform(psInfo->sDstParams.adfGeoTransform,
3020 903 : psInfo->sDstParams.adfInvGeoTransform))
3021 : {
3022 0 : CPLError(CE_Failure, CPLE_AppDefined, "Cannot invert geotransform");
3023 : }
3024 : }
3025 :
3026 : /************************************************************************/
3027 : /* GDALDestroyGenImgProjTransformer() */
3028 : /************************************************************************/
3029 :
3030 : /**
3031 : * GenImgProjTransformer deallocator.
3032 : *
3033 : * This function is used to deallocate the handle created with
3034 : * GDALCreateGenImgProjTransformer().
3035 : *
3036 : * @param hTransformArg the handle to deallocate.
3037 : */
3038 :
3039 2043 : void GDALDestroyGenImgProjTransformer(void *hTransformArg)
3040 :
3041 : {
3042 2043 : if (hTransformArg == nullptr)
3043 0 : return;
3044 :
3045 2043 : GDALGenImgProjTransformInfo *psInfo =
3046 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3047 :
3048 2043 : if (psInfo->sSrcParams.pTransformArg != nullptr)
3049 147 : GDALDestroyTransformer(psInfo->sSrcParams.pTransformArg);
3050 :
3051 2043 : if (psInfo->sDstParams.pTransformArg != nullptr)
3052 7 : GDALDestroyTransformer(psInfo->sDstParams.pTransformArg);
3053 :
3054 2043 : if (psInfo->pReprojectArg != nullptr)
3055 1083 : GDALDestroyTransformer(psInfo->pReprojectArg);
3056 :
3057 2043 : CPLFree(psInfo);
3058 : }
3059 :
3060 : /************************************************************************/
3061 : /* GDALGenImgProjTransform() */
3062 : /************************************************************************/
3063 :
3064 : /**
3065 : * Perform general image reprojection transformation.
3066 : *
3067 : * Actually performs the transformation setup in
3068 : * GDALCreateGenImgProjTransformer(). This function matches the signature
3069 : * required by the GDALTransformerFunc(), and more details on the arguments
3070 : * can be found in that topic.
3071 : */
3072 :
3073 : #ifdef DEBUG_APPROX_TRANSFORMER
3074 : int countGDALGenImgProjTransform = 0;
3075 : #endif
3076 :
3077 2248790 : int GDALGenImgProjTransform(void *pTransformArgIn, int bDstToSrc,
3078 : int nPointCount, double *padfX, double *padfY,
3079 : double *padfZ, int *panSuccess)
3080 : {
3081 2248790 : GDALGenImgProjTransformInfo *psInfo =
3082 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArgIn);
3083 :
3084 : #ifdef DEBUG_APPROX_TRANSFORMER
3085 : CPLAssert(nPointCount > 0);
3086 : countGDALGenImgProjTransform += nPointCount;
3087 : #endif
3088 :
3089 20315700 : for (int i = 0; i < nPointCount; i++)
3090 : {
3091 18066900 : panSuccess[i] = (padfX[i] != HUGE_VAL && padfY[i] != HUGE_VAL);
3092 : }
3093 :
3094 2248790 : int ret = TRUE;
3095 :
3096 : /* -------------------------------------------------------------------- */
3097 : /* Convert from src (dst) pixel/line to src (dst) */
3098 : /* georeferenced coordinates. */
3099 : /* -------------------------------------------------------------------- */
3100 : {
3101 2248790 : const auto params = bDstToSrc ? psInfo->sDstParams : psInfo->sSrcParams;
3102 2248790 : const double *padfGeoTransform = params.adfGeoTransform;
3103 2248790 : void *pTransformArg = params.pTransformArg;
3104 2248790 : GDALTransformerFunc pTransformer = params.pTransformer;
3105 :
3106 2248790 : if (pTransformArg != nullptr)
3107 : {
3108 41619 : if (!pTransformer(pTransformArg, FALSE, nPointCount, padfX, padfY,
3109 : padfZ, panSuccess))
3110 1773 : ret = FALSE;
3111 : }
3112 : else
3113 : {
3114 20194400 : for (int i = 0; i < nPointCount; i++)
3115 : {
3116 17987300 : if (!panSuccess[i])
3117 2071 : continue;
3118 :
3119 17985200 : const double dfNewX = padfGeoTransform[0] +
3120 17985200 : padfX[i] * padfGeoTransform[1] +
3121 17985200 : padfY[i] * padfGeoTransform[2];
3122 17985200 : const double dfNewY = padfGeoTransform[3] +
3123 17985200 : padfX[i] * padfGeoTransform[4] +
3124 17985200 : padfY[i] * padfGeoTransform[5];
3125 :
3126 17985200 : padfX[i] = dfNewX;
3127 17985200 : padfY[i] = dfNewY;
3128 : }
3129 : }
3130 : }
3131 :
3132 : /* -------------------------------------------------------------------- */
3133 : /* Reproject if needed. */
3134 : /* -------------------------------------------------------------------- */
3135 2248790 : if (psInfo->pReprojectArg)
3136 : {
3137 1875010 : if (!psInfo->pReproject(psInfo->pReprojectArg, bDstToSrc, nPointCount,
3138 : padfX, padfY, padfZ, panSuccess))
3139 20305 : ret = FALSE;
3140 : }
3141 :
3142 : /* -------------------------------------------------------------------- */
3143 : /* Convert dst (src) georef coordinates back to pixel/line. */
3144 : /* -------------------------------------------------------------------- */
3145 : {
3146 2248790 : const auto params = bDstToSrc ? psInfo->sSrcParams : psInfo->sDstParams;
3147 2248790 : const double *padfInvGeoTransform = params.adfInvGeoTransform;
3148 2248790 : void *pTransformArg = params.pTransformArg;
3149 2248790 : GDALTransformerFunc pTransformer = params.pTransformer;
3150 :
3151 2248790 : if (pTransformArg != nullptr)
3152 : {
3153 51490 : if (!pTransformer(pTransformArg, TRUE, nPointCount, padfX, padfY,
3154 : padfZ, panSuccess))
3155 1648 : ret = FALSE;
3156 : }
3157 : else
3158 : {
3159 19410900 : for (int i = 0; i < nPointCount; i++)
3160 : {
3161 17213600 : if (!panSuccess[i])
3162 3558660 : continue;
3163 :
3164 13654900 : const double dfNewX = padfInvGeoTransform[0] +
3165 13654900 : padfX[i] * padfInvGeoTransform[1] +
3166 13654900 : padfY[i] * padfInvGeoTransform[2];
3167 13654900 : const double dfNewY = padfInvGeoTransform[3] +
3168 13654900 : padfX[i] * padfInvGeoTransform[4] +
3169 13654900 : padfY[i] * padfInvGeoTransform[5];
3170 :
3171 13654900 : padfX[i] = dfNewX;
3172 13654900 : padfY[i] = dfNewY;
3173 : }
3174 : }
3175 : }
3176 :
3177 2248790 : return ret;
3178 : }
3179 :
3180 : /************************************************************************/
3181 : /* GDALTransformLonLatToDestGenImgProjTransformer() */
3182 : /************************************************************************/
3183 :
3184 2938 : int GDALTransformLonLatToDestGenImgProjTransformer(void *hTransformArg,
3185 : double *pdfX, double *pdfY)
3186 : {
3187 2938 : GDALGenImgProjTransformInfo *psInfo =
3188 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3189 :
3190 2938 : if (psInfo->pReprojectArg == nullptr ||
3191 1672 : psInfo->pReproject != GDALReprojectionTransform)
3192 1270 : return false;
3193 :
3194 1668 : GDALReprojectionTransformInfo *psReprojInfo =
3195 : static_cast<GDALReprojectionTransformInfo *>(psInfo->pReprojectArg);
3196 3336 : if (psReprojInfo->poForwardTransform == nullptr ||
3197 1668 : psReprojInfo->poForwardTransform->GetSourceCS() == nullptr)
3198 2 : return false;
3199 :
3200 1666 : double z = 0;
3201 1666 : int success = true;
3202 1666 : auto poSourceCRS = psReprojInfo->poForwardTransform->GetSourceCS();
3203 2942 : if (poSourceCRS->IsGeographic() &&
3204 1276 : std::fabs(poSourceCRS->GetAngularUnits() -
3205 1276 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9)
3206 : {
3207 : // Optimization to avoid creating a OGRCoordinateTransformation
3208 1274 : OGRAxisOrientation eSourceFirstAxisOrient = OAO_Other;
3209 1274 : poSourceCRS->GetAxis(nullptr, 0, &eSourceFirstAxisOrient);
3210 1274 : const auto &mapping = poSourceCRS->GetDataAxisToSRSAxisMapping();
3211 2548 : if ((mapping[0] == 2 && eSourceFirstAxisOrient == OAO_East) ||
3212 1274 : (mapping[0] == 1 && eSourceFirstAxisOrient != OAO_East))
3213 : {
3214 6 : std::swap(*pdfX, *pdfY);
3215 : }
3216 : }
3217 : else
3218 : {
3219 : auto poLongLat =
3220 392 : std::unique_ptr<OGRSpatialReference>(poSourceCRS->CloneGeogCS());
3221 392 : if (poLongLat == nullptr)
3222 0 : return false;
3223 392 : poLongLat->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3224 :
3225 : const bool bCurrentCheckWithInvertProj =
3226 392 : GetCurrentCheckWithInvertPROJ();
3227 392 : if (!bCurrentCheckWithInvertProj)
3228 392 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", "YES");
3229 : auto poCT = std::unique_ptr<OGRCoordinateTransformation>(
3230 392 : OGRCreateCoordinateTransformation(poLongLat.get(), poSourceCRS));
3231 392 : if (!bCurrentCheckWithInvertProj)
3232 392 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", nullptr);
3233 392 : if (poCT == nullptr)
3234 0 : return false;
3235 :
3236 392 : poCT->SetEmitErrors(false);
3237 392 : if (!poCT->Transform(1, pdfX, pdfY))
3238 4 : return false;
3239 :
3240 388 : if (!psInfo->pReproject(psInfo->pReprojectArg, false, 1, pdfX, pdfY, &z,
3241 632 : &success) ||
3242 244 : !success)
3243 : {
3244 144 : return false;
3245 : }
3246 : }
3247 :
3248 1518 : double *padfGeoTransform = psInfo->sDstParams.adfInvGeoTransform;
3249 1518 : void *pTransformArg = psInfo->sDstParams.pTransformArg;
3250 1518 : GDALTransformerFunc pTransformer = psInfo->sDstParams.pTransformer;
3251 1518 : if (pTransformArg != nullptr)
3252 : {
3253 4 : if (!pTransformer(pTransformArg, TRUE, 1, pdfX, pdfY, &z, &success) ||
3254 0 : !success)
3255 : {
3256 4 : return false;
3257 : }
3258 : }
3259 : else
3260 : {
3261 1514 : const double dfNewX = padfGeoTransform[0] +
3262 1514 : pdfX[0] * padfGeoTransform[1] +
3263 1514 : pdfY[0] * padfGeoTransform[2];
3264 1514 : const double dfNewY = padfGeoTransform[3] +
3265 1514 : pdfX[0] * padfGeoTransform[4] +
3266 1514 : pdfY[0] * padfGeoTransform[5];
3267 :
3268 1514 : pdfX[0] = dfNewX;
3269 1514 : pdfY[0] = dfNewY;
3270 : }
3271 :
3272 1514 : return true;
3273 : }
3274 :
3275 : /************************************************************************/
3276 : /* GDALSerializeGenImgProjTransformer() */
3277 : /************************************************************************/
3278 :
3279 78 : static CPLXMLNode *GDALSerializeGenImgProjTransformer(void *pTransformArg)
3280 :
3281 : {
3282 78 : GDALGenImgProjTransformInfo *psInfo =
3283 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArg);
3284 :
3285 : CPLXMLNode *psTree =
3286 78 : CPLCreateXMLNode(nullptr, CXT_Element, "GenImgProjTransformer");
3287 :
3288 : const auto SerializePart =
3289 455 : [psTree](const char *pszPrefix, const GDALGenImgProjTransformPart &part)
3290 : {
3291 156 : char szWork[200] = {};
3292 :
3293 : /* ------------------------------------------------------------- */
3294 : /* Handle transformation. */
3295 : /* ------------------------------------------------------------- */
3296 156 : if (part.pTransformArg != nullptr)
3297 : {
3298 : CPLXMLNode *psTransformer =
3299 13 : GDALSerializeTransformer(part.pTransformer, part.pTransformArg);
3300 13 : if (psTransformer != nullptr)
3301 : {
3302 13 : CPLXMLNode *psTransformerContainer = CPLCreateXMLNode(
3303 : psTree, CXT_Element,
3304 : CPLSPrintf("%s%s", pszPrefix, psTransformer->pszValue));
3305 :
3306 13 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3307 : }
3308 : }
3309 :
3310 : /* ------------------------------------------------------------- */
3311 : /* Handle geotransforms. */
3312 : /* ------------------------------------------------------------- */
3313 : else
3314 : {
3315 143 : CPLsnprintf(szWork, sizeof(szWork),
3316 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3317 143 : part.adfGeoTransform[0], part.adfGeoTransform[1],
3318 143 : part.adfGeoTransform[2], part.adfGeoTransform[3],
3319 143 : part.adfGeoTransform[4], part.adfGeoTransform[5]);
3320 143 : CPLCreateXMLElementAndValue(
3321 : psTree, CPLSPrintf("%sGeoTransform", pszPrefix), szWork);
3322 :
3323 143 : CPLsnprintf(szWork, sizeof(szWork),
3324 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3325 143 : part.adfInvGeoTransform[0], part.adfInvGeoTransform[1],
3326 143 : part.adfInvGeoTransform[2], part.adfInvGeoTransform[3],
3327 143 : part.adfInvGeoTransform[4], part.adfInvGeoTransform[5]);
3328 143 : CPLCreateXMLElementAndValue(
3329 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix), szWork);
3330 : }
3331 156 : };
3332 :
3333 78 : SerializePart("Src", psInfo->sSrcParams);
3334 78 : SerializePart("Dst", psInfo->sDstParams);
3335 :
3336 : /* -------------------------------------------------------------------- */
3337 : /* Do we have a reprojection transformer? */
3338 : /* -------------------------------------------------------------------- */
3339 78 : if (psInfo->pReprojectArg != nullptr)
3340 : {
3341 :
3342 : CPLXMLNode *psTransformerContainer =
3343 51 : CPLCreateXMLNode(psTree, CXT_Element, "ReprojectTransformer");
3344 :
3345 : CPLXMLNode *psTransformer =
3346 51 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
3347 51 : if (psTransformer != nullptr)
3348 51 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3349 : }
3350 :
3351 78 : return psTree;
3352 : }
3353 :
3354 : /************************************************************************/
3355 : /* GDALDeserializeGeoTransform() */
3356 : /************************************************************************/
3357 :
3358 739 : static void GDALDeserializeGeoTransform(const char *pszGT,
3359 : double adfGeoTransform[6])
3360 : {
3361 739 : CPLsscanf(pszGT, "%lf,%lf,%lf,%lf,%lf,%lf", adfGeoTransform + 0,
3362 : adfGeoTransform + 1, adfGeoTransform + 2, adfGeoTransform + 3,
3363 : adfGeoTransform + 4, adfGeoTransform + 5);
3364 739 : }
3365 :
3366 : /************************************************************************/
3367 : /* GDALDeserializeGenImgProjTransformer() */
3368 : /************************************************************************/
3369 :
3370 199 : void *GDALDeserializeGenImgProjTransformer(CPLXMLNode *psTree)
3371 :
3372 : {
3373 : /* -------------------------------------------------------------------- */
3374 : /* Initialize the transform info. */
3375 : /* -------------------------------------------------------------------- */
3376 : GDALGenImgProjTransformInfo *psInfo =
3377 199 : GDALCreateGenImgProjTransformerInternal();
3378 :
3379 : const auto DeserializePart =
3380 1194 : [psTree](const char *pszPrefix, GDALGenImgProjTransformPart &part)
3381 : {
3382 : /* ----------------------------------------------------------------- */
3383 : /* Geotransform */
3384 : /* ----------------------------------------------------------------- */
3385 398 : if (const auto psGTNode =
3386 398 : CPLGetXMLNode(psTree, CPLSPrintf("%sGeoTransform", pszPrefix)))
3387 : {
3388 382 : GDALDeserializeGeoTransform(CPLGetXMLValue(psGTNode, "", ""),
3389 382 : part.adfGeoTransform);
3390 :
3391 382 : if (const auto psInvGTNode = CPLGetXMLNode(
3392 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix)))
3393 : {
3394 357 : GDALDeserializeGeoTransform(CPLGetXMLValue(psInvGTNode, "", ""),
3395 357 : part.adfInvGeoTransform);
3396 : }
3397 : else
3398 : {
3399 25 : if (!GDALInvGeoTransform(part.adfGeoTransform,
3400 25 : part.adfInvGeoTransform))
3401 : {
3402 0 : CPLError(CE_Failure, CPLE_AppDefined,
3403 : "Cannot invert geotransform");
3404 : }
3405 : }
3406 : }
3407 :
3408 : /* ---------------------------------------------------------------- */
3409 : /* Transform */
3410 : /* ---------------------------------------------------------------- */
3411 : else
3412 : {
3413 16 : for (CPLXMLNode *psIter = psTree->psChild; psIter != nullptr;
3414 0 : psIter = psIter->psNext)
3415 : {
3416 16 : if (psIter->eType == CXT_Element &&
3417 16 : STARTS_WITH_CI(psIter->pszValue, pszPrefix))
3418 : {
3419 16 : GDALDeserializeTransformer(psIter->psChild,
3420 : &part.pTransformer,
3421 : &part.pTransformArg);
3422 16 : break;
3423 : }
3424 : }
3425 : }
3426 597 : };
3427 :
3428 199 : DeserializePart("Src", psInfo->sSrcParams);
3429 199 : DeserializePart("Dst", psInfo->sDstParams);
3430 :
3431 : /* -------------------------------------------------------------------- */
3432 : /* Reproject transformer */
3433 : /* -------------------------------------------------------------------- */
3434 199 : CPLXMLNode *psSubtree = CPLGetXMLNode(psTree, "ReprojectTransformer");
3435 199 : if (psSubtree != nullptr && psSubtree->psChild != nullptr)
3436 : {
3437 98 : GDALDeserializeTransformer(psSubtree->psChild, &psInfo->pReproject,
3438 : &psInfo->pReprojectArg);
3439 : }
3440 :
3441 199 : return psInfo;
3442 : }
3443 :
3444 : /************************************************************************/
3445 : /* GDALCreateReprojectionTransformer() */
3446 : /************************************************************************/
3447 :
3448 : /**
3449 : * Create reprojection transformer.
3450 : *
3451 : * Creates a callback data structure suitable for use with
3452 : * GDALReprojectionTransformation() to represent a transformation from
3453 : * one geographic or projected coordinate system to another. On input
3454 : * the coordinate systems are described in OpenGIS WKT format.
3455 : *
3456 : * Internally the OGRCoordinateTransformation object is used to implement
3457 : * the reprojection.
3458 : *
3459 : * @param pszSrcWKT the coordinate system for the source coordinate system.
3460 : * @param pszDstWKT the coordinate system for the destination coordinate
3461 : * system.
3462 : *
3463 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3464 : * system fails to initialize the reprojection.
3465 : **/
3466 :
3467 0 : void *GDALCreateReprojectionTransformer(const char *pszSrcWKT,
3468 : const char *pszDstWKT)
3469 :
3470 : {
3471 : /* -------------------------------------------------------------------- */
3472 : /* Ingest the SRS definitions. */
3473 : /* -------------------------------------------------------------------- */
3474 0 : OGRSpatialReference oSrcSRS;
3475 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3476 0 : if (oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
3477 : {
3478 0 : CPLError(CE_Failure, CPLE_AppDefined,
3479 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3480 0 : return nullptr;
3481 : }
3482 :
3483 0 : OGRSpatialReference oDstSRS;
3484 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3485 0 : if (oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
3486 : {
3487 0 : CPLError(CE_Failure, CPLE_AppDefined,
3488 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3489 0 : return nullptr;
3490 : }
3491 :
3492 0 : return GDALCreateReprojectionTransformerEx(
3493 : OGRSpatialReference::ToHandle(&oSrcSRS),
3494 0 : OGRSpatialReference::ToHandle(&oDstSRS), nullptr);
3495 : }
3496 :
3497 : /************************************************************************/
3498 : /* GDALCreateReprojectionTransformerEx() */
3499 : /************************************************************************/
3500 :
3501 : /**
3502 : * Create reprojection transformer.
3503 : *
3504 : * Creates a callback data structure suitable for use with
3505 : * GDALReprojectionTransformation() to represent a transformation from
3506 : * one geographic or projected coordinate system to another.
3507 : *
3508 : * Internally the OGRCoordinateTransformation object is used to implement
3509 : * the reprojection.
3510 : *
3511 : * @param hSrcSRS the coordinate system for the source coordinate system.
3512 : * @param hDstSRS the coordinate system for the destination coordinate
3513 : * system.
3514 : * @param papszOptions NULL-terminated list of options, or NULL. Currently
3515 : * supported options are:
3516 : * <ul>
3517 : * <li>AREA_OF_INTEREST=west_long,south_lat,east_long,north_lat: Values in
3518 : * degrees. longitudes in [-180,180], latitudes in [-90,90].</li>
3519 : * <li>COORDINATE_OPERATION=string: PROJ or WKT string representing a
3520 : * coordinate operation, overriding the default computed transformation.</li>
3521 : * <li>COORDINATE_EPOCH=decimal_year: Coordinate epoch, expressed as a
3522 : * decimal year. Useful for time-dependent coordinate operations.</li>
3523 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
3524 : * expressed as a decimal year. Useful for time-dependent coordinate
3525 : *operations.</li>
3526 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch
3527 : *of target CRS, expressed as a decimal year. Useful for time-dependent
3528 : *coordinate operations.</li>
3529 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
3530 : * operations are allowed. Defaults to YES.</li>
3531 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
3532 : * PROJ 9.x series), PROJ may use coordinate
3533 : * operations that are not the "best" if resources (typically grids) needed
3534 : * to use them are missing. It will then fallback to other coordinate operations
3535 : * that have a lesser accuracy, for example using Helmert transformations,
3536 : * or in the absence of such operations, to ones with potential very rought
3537 : * accuracy, using "ballpark" transformations
3538 : * (see https://proj.org/glossary.html).
3539 : * When calling this method with YES, PROJ will only consider the
3540 : * "best" operation, and error out (at Transform() time) if they cannot be
3541 : * used.
3542 : * This method may be used together with ALLOW_BALLPARK=NO to
3543 : * only allow best operations that have a known accuracy.
3544 : * Note that this method has no effect on PROJ versions before 9.2.
3545 : * The default value for this option can be also set with the
3546 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
3547 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
3548 : * </ul>
3549 : *
3550 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3551 : * system fails to initialize the reprojection.
3552 : *
3553 : * @since GDAL 3.0
3554 : **/
3555 :
3556 1158 : void *GDALCreateReprojectionTransformerEx(OGRSpatialReferenceH hSrcSRS,
3557 : OGRSpatialReferenceH hDstSRS,
3558 : const char *const *papszOptions)
3559 : {
3560 1158 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
3561 1158 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
3562 :
3563 : /* -------------------------------------------------------------------- */
3564 : /* Build the forward coordinate transformation. */
3565 : /* -------------------------------------------------------------------- */
3566 1158 : double dfWestLongitudeDeg = 0.0;
3567 1158 : double dfSouthLatitudeDeg = 0.0;
3568 1158 : double dfEastLongitudeDeg = 0.0;
3569 1158 : double dfNorthLatitudeDeg = 0.0;
3570 1158 : const char *pszBBOX = CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST");
3571 1158 : if (pszBBOX)
3572 : {
3573 1089 : char **papszTokens = CSLTokenizeString2(pszBBOX, ",", 0);
3574 1089 : if (CSLCount(papszTokens) == 4)
3575 : {
3576 1089 : dfWestLongitudeDeg = CPLAtof(papszTokens[0]);
3577 1089 : dfSouthLatitudeDeg = CPLAtof(papszTokens[1]);
3578 1089 : dfEastLongitudeDeg = CPLAtof(papszTokens[2]);
3579 1089 : dfNorthLatitudeDeg = CPLAtof(papszTokens[3]);
3580 : }
3581 1089 : CSLDestroy(papszTokens);
3582 : }
3583 1158 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
3584 :
3585 2316 : OGRCoordinateTransformationOptions optionsFwd;
3586 1158 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
3587 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
3588 : {
3589 1089 : optionsFwd.SetAreaOfInterest(dfWestLongitudeDeg, dfSouthLatitudeDeg,
3590 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
3591 : }
3592 1158 : if (pszCO)
3593 : {
3594 7 : optionsFwd.SetCoordinateOperation(pszCO, false);
3595 : }
3596 :
3597 1158 : const char *pszCENTER_LONG = CSLFetchNameValue(papszOptions, "CENTER_LONG");
3598 1158 : if (pszCENTER_LONG)
3599 : {
3600 786 : optionsFwd.SetSourceCenterLong(CPLAtof(pszCENTER_LONG));
3601 : }
3602 :
3603 1158 : optionsFwd.SetBallparkAllowed(CPLTestBool(
3604 : CSLFetchNameValueDef(papszOptions, "ALLOW_BALLPARK", "YES")));
3605 :
3606 : const char *pszOnlyBest =
3607 1158 : CSLFetchNameValueDef(papszOptions, "ONLY_BEST", "AUTO");
3608 1158 : if (!EQUAL(pszOnlyBest, "AUTO"))
3609 : {
3610 1 : optionsFwd.SetOnlyBest(CPLTestBool(pszOnlyBest));
3611 : }
3612 :
3613 : OGRCoordinateTransformation *poForwardTransform =
3614 1158 : OGRCreateCoordinateTransformation(poSrcSRS, poDstSRS, optionsFwd);
3615 :
3616 1158 : if (poForwardTransform == nullptr)
3617 : // OGRCreateCoordinateTransformation() will report errors on its own.
3618 6 : return nullptr;
3619 :
3620 1152 : poForwardTransform->SetEmitErrors(false);
3621 :
3622 : /* -------------------------------------------------------------------- */
3623 : /* Create a structure to hold the transform info, and also */
3624 : /* build reverse transform. We assume that if the forward */
3625 : /* transform can be created, then so can the reverse one. */
3626 : /* -------------------------------------------------------------------- */
3627 1152 : GDALReprojectionTransformInfo *psInfo = new GDALReprojectionTransformInfo();
3628 :
3629 1152 : psInfo->papszOptions = CSLDuplicate(papszOptions);
3630 1152 : psInfo->poForwardTransform = poForwardTransform;
3631 1152 : psInfo->dfTime = CPLAtof(CSLFetchNameValueDef(
3632 : papszOptions, "COORDINATE_EPOCH",
3633 : CSLFetchNameValueDef(
3634 : papszOptions, "DST_COORDINATE_EPOCH",
3635 : CSLFetchNameValueDef(papszOptions, "SRC_COORDINATE_EPOCH", "0"))));
3636 1152 : psInfo->poReverseTransform = poForwardTransform->GetInverse();
3637 :
3638 1152 : if (psInfo->poReverseTransform)
3639 1152 : psInfo->poReverseTransform->SetEmitErrors(false);
3640 :
3641 1152 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
3642 : strlen(GDAL_GTI2_SIGNATURE));
3643 1152 : psInfo->sTI.pszClassName = GDAL_REPROJECTION_TRANSFORMER_CLASS_NAME;
3644 1152 : psInfo->sTI.pfnTransform = GDALReprojectionTransform;
3645 1152 : psInfo->sTI.pfnCleanup = GDALDestroyReprojectionTransformer;
3646 1152 : psInfo->sTI.pfnSerialize = GDALSerializeReprojectionTransformer;
3647 :
3648 1152 : return psInfo;
3649 : }
3650 :
3651 : /************************************************************************/
3652 : /* GDALDestroyReprojectionTransformer() */
3653 : /************************************************************************/
3654 :
3655 : /**
3656 : * Destroy reprojection transformation.
3657 : *
3658 : * @param pTransformArg the transformation handle returned by
3659 : * GDALCreateReprojectionTransformer().
3660 : */
3661 :
3662 1152 : void GDALDestroyReprojectionTransformer(void *pTransformArg)
3663 :
3664 : {
3665 1152 : if (pTransformArg == nullptr)
3666 0 : return;
3667 :
3668 1152 : GDALReprojectionTransformInfo *psInfo =
3669 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3670 :
3671 1152 : if (psInfo->poForwardTransform)
3672 1152 : OGRCoordinateTransformation::DestroyCT(psInfo->poForwardTransform);
3673 :
3674 1152 : if (psInfo->poReverseTransform)
3675 1152 : OGRCoordinateTransformation::DestroyCT(psInfo->poReverseTransform);
3676 :
3677 1152 : CSLDestroy(psInfo->papszOptions);
3678 :
3679 1152 : delete psInfo;
3680 : }
3681 :
3682 : /************************************************************************/
3683 : /* GDALReprojectionTransform() */
3684 : /************************************************************************/
3685 :
3686 : /**
3687 : * Perform reprojection transformation.
3688 : *
3689 : * Actually performs the reprojection transformation described in
3690 : * GDALCreateReprojectionTransformer(). This function matches the
3691 : * GDALTransformerFunc() signature. Details of the arguments are described
3692 : * there.
3693 : */
3694 :
3695 1875400 : int GDALReprojectionTransform(void *pTransformArg, int bDstToSrc,
3696 : int nPointCount, double *padfX, double *padfY,
3697 : double *padfZ, int *panSuccess)
3698 :
3699 : {
3700 1875400 : GDALReprojectionTransformInfo *psInfo =
3701 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3702 : int bSuccess;
3703 :
3704 1875400 : std::vector<double> adfTime;
3705 1875390 : double *padfT = nullptr;
3706 1875390 : if (psInfo->dfTime != 0.0 && nPointCount > 0)
3707 : {
3708 1 : adfTime.resize(nPointCount, psInfo->dfTime);
3709 1 : padfT = &adfTime[0];
3710 : }
3711 :
3712 1875390 : if (bDstToSrc)
3713 : {
3714 1621590 : if (psInfo->poReverseTransform == nullptr)
3715 : {
3716 0 : CPLError(
3717 : CE_Failure, CPLE_AppDefined,
3718 : "Inverse coordinate transformation cannot be instantiated");
3719 0 : if (panSuccess)
3720 : {
3721 0 : for (int i = 0; i < nPointCount; i++)
3722 0 : panSuccess[i] = FALSE;
3723 : }
3724 0 : bSuccess = false;
3725 : }
3726 : else
3727 : {
3728 1621600 : bSuccess = psInfo->poReverseTransform->Transform(
3729 1621590 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3730 : }
3731 : }
3732 : else
3733 253794 : bSuccess = psInfo->poForwardTransform->Transform(
3734 253794 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3735 :
3736 3750780 : return bSuccess;
3737 : }
3738 :
3739 : /************************************************************************/
3740 : /* GDALSerializeReprojectionTransformer() */
3741 : /************************************************************************/
3742 :
3743 155 : static CPLXMLNode *GDALSerializeReprojectionTransformer(void *pTransformArg)
3744 :
3745 : {
3746 : CPLXMLNode *psTree;
3747 155 : GDALReprojectionTransformInfo *psInfo =
3748 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3749 :
3750 155 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ReprojectionTransformer");
3751 :
3752 : /* -------------------------------------------------------------------- */
3753 : /* Handle SourceCS. */
3754 : /* -------------------------------------------------------------------- */
3755 310 : const auto ExportToWkt = [](const OGRSpatialReference *poSRS)
3756 : {
3757 : // Try first in WKT1 for backward compat
3758 : {
3759 310 : char *pszWKT = nullptr;
3760 310 : const char *const apszOptions[] = {"FORMAT=WKT1", nullptr};
3761 310 : CPLErrorHandlerPusher oHandler(CPLQuietErrorHandler);
3762 309 : CPLErrorStateBackuper oBackuper;
3763 310 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3764 : {
3765 618 : std::string osRet(pszWKT);
3766 309 : CPLFree(pszWKT);
3767 309 : return osRet;
3768 : }
3769 1 : CPLFree(pszWKT);
3770 : }
3771 :
3772 1 : char *pszWKT = nullptr;
3773 1 : const char *const apszOptions[] = {"FORMAT=WKT2_2019", nullptr};
3774 1 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3775 : {
3776 2 : std::string osRet(pszWKT);
3777 1 : CPLFree(pszWKT);
3778 1 : return osRet;
3779 : }
3780 0 : CPLFree(pszWKT);
3781 0 : return std::string();
3782 : };
3783 :
3784 154 : auto poSRS = psInfo->poForwardTransform->GetSourceCS();
3785 154 : if (poSRS)
3786 : {
3787 309 : const auto osWKT = ExportToWkt(poSRS);
3788 155 : CPLCreateXMLElementAndValue(psTree, "SourceSRS", osWKT.c_str());
3789 : }
3790 :
3791 : /* -------------------------------------------------------------------- */
3792 : /* Handle DestinationCS. */
3793 : /* -------------------------------------------------------------------- */
3794 155 : poSRS = psInfo->poForwardTransform->GetTargetCS();
3795 155 : if (poSRS)
3796 : {
3797 310 : const auto osWKT = ExportToWkt(poSRS);
3798 155 : CPLCreateXMLElementAndValue(psTree, "TargetSRS", osWKT.c_str());
3799 : }
3800 :
3801 : /* -------------------------------------------------------------------- */
3802 : /* Serialize options. */
3803 : /* -------------------------------------------------------------------- */
3804 155 : if (psInfo->papszOptions)
3805 : {
3806 : CPLXMLNode *psOptions =
3807 142 : CPLCreateXMLNode(psTree, CXT_Element, "Options");
3808 358 : for (auto iter = psInfo->papszOptions; *iter != nullptr; ++iter)
3809 : {
3810 216 : char *pszKey = nullptr;
3811 216 : const char *pszValue = CPLParseNameValue(*iter, &pszKey);
3812 216 : if (pszKey && pszValue)
3813 : {
3814 : auto elt =
3815 216 : CPLCreateXMLElementAndValue(psOptions, "Option", pszValue);
3816 216 : CPLAddXMLAttributeAndValue(elt, "key", pszKey);
3817 : }
3818 216 : CPLFree(pszKey);
3819 : }
3820 : }
3821 :
3822 155 : return psTree;
3823 : }
3824 :
3825 : /************************************************************************/
3826 : /* GDALDeserializeReprojectionTransformer() */
3827 : /************************************************************************/
3828 :
3829 202 : static void *GDALDeserializeReprojectionTransformer(CPLXMLNode *psTree)
3830 :
3831 : {
3832 202 : const char *pszSourceSRS = CPLGetXMLValue(psTree, "SourceSRS", nullptr);
3833 202 : const char *pszTargetSRS = CPLGetXMLValue(psTree, "TargetSRS", nullptr);
3834 202 : char *pszSourceWKT = nullptr, *pszTargetWKT = nullptr;
3835 202 : void *pResult = nullptr;
3836 :
3837 404 : OGRSpatialReference oSrcSRS;
3838 404 : OGRSpatialReference oDstSRS;
3839 :
3840 202 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3841 202 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3842 202 : if (pszSourceSRS != nullptr)
3843 : {
3844 202 : oSrcSRS.SetFromUserInput(pszSourceSRS);
3845 : }
3846 :
3847 202 : if (pszTargetSRS != nullptr)
3848 : {
3849 202 : oDstSRS.SetFromUserInput(pszTargetSRS);
3850 : }
3851 :
3852 202 : CPLStringList aosList;
3853 202 : const CPLXMLNode *psOptions = CPLGetXMLNode(psTree, "Options");
3854 202 : if (psOptions)
3855 : {
3856 426 : for (auto iter = psOptions->psChild; iter; iter = iter->psNext)
3857 : {
3858 260 : if (iter->eType == CXT_Element &&
3859 260 : strcmp(iter->pszValue, "Option") == 0)
3860 : {
3861 260 : const char *pszKey = CPLGetXMLValue(iter, "key", nullptr);
3862 260 : const char *pszValue = CPLGetXMLValue(iter, nullptr, nullptr);
3863 260 : if (pszKey && pszValue)
3864 : {
3865 260 : aosList.SetNameValue(pszKey, pszValue);
3866 : }
3867 : }
3868 : }
3869 : }
3870 :
3871 202 : pResult = GDALCreateReprojectionTransformerEx(
3872 202 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS) : nullptr,
3873 202 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS) : nullptr,
3874 202 : aosList.List());
3875 :
3876 202 : CPLFree(pszSourceWKT);
3877 202 : CPLFree(pszTargetWKT);
3878 :
3879 404 : return pResult;
3880 : }
3881 :
3882 : /************************************************************************/
3883 : /* ==================================================================== */
3884 : /* Approximate transformer. */
3885 : /* ==================================================================== */
3886 : /************************************************************************/
3887 :
3888 : /************************************************************************/
3889 : /* GDALCreateSimilarApproxTransformer() */
3890 : /************************************************************************/
3891 :
3892 41 : static void *GDALCreateSimilarApproxTransformer(void *hTransformArg,
3893 : double dfSrcRatioX,
3894 : double dfSrcRatioY)
3895 : {
3896 41 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarApproxTransformer",
3897 : nullptr);
3898 :
3899 41 : GDALApproxTransformInfo *psInfo =
3900 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
3901 :
3902 41 : void *pBaseCBData = GDALCreateSimilarTransformer(psInfo->pBaseCBData,
3903 : dfSrcRatioX, dfSrcRatioY);
3904 41 : if (pBaseCBData == nullptr)
3905 : {
3906 0 : return nullptr;
3907 : }
3908 :
3909 : GDALApproxTransformInfo *psClonedInfo =
3910 41 : static_cast<GDALApproxTransformInfo *>(GDALCreateApproxTransformer2(
3911 : psInfo->pfnBaseTransformer, pBaseCBData, psInfo->dfMaxErrorForward,
3912 : psInfo->dfMaxErrorReverse));
3913 41 : psClonedInfo->bOwnSubtransformer = TRUE;
3914 :
3915 41 : return psClonedInfo;
3916 : }
3917 :
3918 : /************************************************************************/
3919 : /* GDALSerializeApproxTransformer() */
3920 : /************************************************************************/
3921 :
3922 58 : static CPLXMLNode *GDALSerializeApproxTransformer(void *pTransformArg)
3923 :
3924 : {
3925 : CPLXMLNode *psTree;
3926 58 : GDALApproxTransformInfo *psInfo =
3927 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
3928 :
3929 58 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ApproxTransformer");
3930 :
3931 : /* -------------------------------------------------------------------- */
3932 : /* Attach max error. */
3933 : /* -------------------------------------------------------------------- */
3934 58 : if (psInfo->dfMaxErrorForward == psInfo->dfMaxErrorReverse)
3935 : {
3936 56 : CPLCreateXMLElementAndValue(
3937 : psTree, "MaxError",
3938 112 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3939 : }
3940 : else
3941 : {
3942 2 : CPLCreateXMLElementAndValue(
3943 : psTree, "MaxErrorForward",
3944 4 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3945 2 : CPLCreateXMLElementAndValue(
3946 : psTree, "MaxErrorReverse",
3947 4 : CPLString().Printf("%g", psInfo->dfMaxErrorReverse));
3948 : }
3949 :
3950 : /* -------------------------------------------------------------------- */
3951 : /* Capture underlying transformer. */
3952 : /* -------------------------------------------------------------------- */
3953 : CPLXMLNode *psTransformerContainer =
3954 58 : CPLCreateXMLNode(psTree, CXT_Element, "BaseTransformer");
3955 :
3956 58 : CPLXMLNode *psTransformer = GDALSerializeTransformer(
3957 : psInfo->pfnBaseTransformer, psInfo->pBaseCBData);
3958 58 : if (psTransformer != nullptr)
3959 58 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3960 :
3961 58 : return psTree;
3962 : }
3963 :
3964 : /************************************************************************/
3965 : /* GDALCreateApproxTransformer() */
3966 : /************************************************************************/
3967 :
3968 : /**
3969 : * Create an approximating transformer.
3970 : *
3971 : * This function creates a context for an approximated transformer. Basically
3972 : * a high precision transformer is supplied as input and internally linear
3973 : * approximations are computed to generate results to within a defined
3974 : * precision.
3975 : *
3976 : * The approximation is actually done at the point where GDALApproxTransform()
3977 : * calls are made, and depend on the assumption that they are roughly linear.
3978 : * The first and last point passed in must be the extreme values and the
3979 : * intermediate values should describe a curve between the end points. The
3980 : * approximator transforms and centers using the approximate transformer, and
3981 : * then compares the true middle transformed value to a linear approximation
3982 : * based on the end points. If the error is within the supplied threshold then
3983 : * the end points are used to linearly approximate all the values otherwise the
3984 : * input points are split into two smaller sets, and the function is recursively
3985 : * called until a sufficiently small set of points is found that the linear
3986 : * approximation is OK, or that all the points are exactly computed.
3987 : *
3988 : * This function is very suitable for approximating transformation results
3989 : * from output pixel/line space to input coordinates for warpers that operate
3990 : * on one input scanline at a time. Care should be taken using it in other
3991 : * circumstances as little internal validation is done in order to keep things
3992 : * fast.
3993 : *
3994 : * @param pfnBaseTransformer the high precision transformer which should be
3995 : * approximated.
3996 : * @param pBaseTransformArg the callback argument for the high precision
3997 : * transformer.
3998 : * @param dfMaxError the maximum cartesian error in the "output" space that
3999 : * is to be accepted in the linear approximation, evaluated as a Manhattan
4000 : * distance.
4001 : *
4002 : * @return callback pointer suitable for use with GDALApproxTransform(). It
4003 : * should be deallocated with GDALDestroyApproxTransformer().
4004 : */
4005 :
4006 1116 : void *GDALCreateApproxTransformer(GDALTransformerFunc pfnBaseTransformer,
4007 : void *pBaseTransformArg, double dfMaxError)
4008 :
4009 : {
4010 1116 : return GDALCreateApproxTransformer2(pfnBaseTransformer, pBaseTransformArg,
4011 1116 : dfMaxError, dfMaxError);
4012 : }
4013 :
4014 : static void *
4015 1310 : GDALCreateApproxTransformer2(GDALTransformerFunc pfnBaseTransformer,
4016 : void *pBaseTransformArg, double dfMaxErrorForward,
4017 : double dfMaxErrorReverse)
4018 :
4019 : {
4020 1310 : GDALApproxTransformInfo *psATInfo = new GDALApproxTransformInfo;
4021 1310 : psATInfo->pfnBaseTransformer = pfnBaseTransformer;
4022 1310 : psATInfo->pBaseCBData = pBaseTransformArg;
4023 1310 : psATInfo->dfMaxErrorForward = dfMaxErrorForward;
4024 1310 : psATInfo->dfMaxErrorReverse = dfMaxErrorReverse;
4025 1310 : psATInfo->bOwnSubtransformer = FALSE;
4026 :
4027 1310 : memcpy(psATInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
4028 : strlen(GDAL_GTI2_SIGNATURE));
4029 1310 : psATInfo->sTI.pszClassName = GDAL_APPROX_TRANSFORMER_CLASS_NAME;
4030 1310 : psATInfo->sTI.pfnTransform = GDALApproxTransform;
4031 1310 : psATInfo->sTI.pfnCleanup = GDALDestroyApproxTransformer;
4032 1310 : psATInfo->sTI.pfnSerialize = GDALSerializeApproxTransformer;
4033 1310 : psATInfo->sTI.pfnCreateSimilar = GDALCreateSimilarApproxTransformer;
4034 :
4035 1310 : return psATInfo;
4036 : }
4037 :
4038 : /************************************************************************/
4039 : /* GDALApproxTransformerOwnsSubtransformer() */
4040 : /************************************************************************/
4041 :
4042 : /** Set bOwnSubtransformer flag */
4043 1266 : void GDALApproxTransformerOwnsSubtransformer(void *pCBData, int bOwnFlag)
4044 :
4045 : {
4046 1266 : GDALApproxTransformInfo *psATInfo =
4047 : static_cast<GDALApproxTransformInfo *>(pCBData);
4048 :
4049 1266 : psATInfo->bOwnSubtransformer = bOwnFlag;
4050 1266 : }
4051 :
4052 : /************************************************************************/
4053 : /* GDALDestroyApproxTransformer() */
4054 : /************************************************************************/
4055 :
4056 : /**
4057 : * Cleanup approximate transformer.
4058 : *
4059 : * Deallocates the resources allocated by GDALCreateApproxTransformer().
4060 : *
4061 : * @param pCBData callback data originally returned by
4062 : * GDALCreateApproxTransformer().
4063 : */
4064 :
4065 1310 : void GDALDestroyApproxTransformer(void *pCBData)
4066 :
4067 : {
4068 1310 : if (pCBData == nullptr)
4069 0 : return;
4070 :
4071 1310 : GDALApproxTransformInfo *psATInfo =
4072 : static_cast<GDALApproxTransformInfo *>(pCBData);
4073 :
4074 1310 : if (psATInfo->bOwnSubtransformer)
4075 1307 : GDALDestroyTransformer(psATInfo->pBaseCBData);
4076 :
4077 1310 : delete psATInfo;
4078 : }
4079 :
4080 : /************************************************************************/
4081 : /* GDALRefreshApproxTransformer() */
4082 : /************************************************************************/
4083 :
4084 44 : void GDALRefreshApproxTransformer(void *hTransformArg)
4085 : {
4086 44 : GDALApproxTransformInfo *psInfo =
4087 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4088 :
4089 44 : if (GDALIsTransformer(psInfo->pBaseCBData,
4090 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4091 : {
4092 44 : GDALRefreshGenImgProjTransformer(psInfo->pBaseCBData);
4093 : }
4094 44 : }
4095 :
4096 : /************************************************************************/
4097 : /* GDALApproxTransformInternal() */
4098 : /************************************************************************/
4099 :
4100 1287130 : static int GDALApproxTransformInternal(void *pCBData, int bDstToSrc,
4101 : int nPoints, double *x, double *y,
4102 : double *z, int *panSuccess,
4103 : // SME = Start, Middle, End.
4104 : const double xSMETransformed[3],
4105 : const double ySMETransformed[3],
4106 : const double zSMETransformed[3])
4107 : {
4108 1287130 : GDALApproxTransformInfo *psATInfo =
4109 : static_cast<GDALApproxTransformInfo *>(pCBData);
4110 1287130 : const int nMiddle = (nPoints - 1) / 2;
4111 :
4112 : #ifdef notdef_sanify_check
4113 : {
4114 : double x2[3] = {x[0], x[nMiddle], x[nPoints - 1]};
4115 : double y2[3] = {y[0], y[nMiddle], y[nPoints - 1]};
4116 : double z2[3] = {z[0], z[nMiddle], z[nPoints - 1]};
4117 : int anSuccess2[3] = {};
4118 :
4119 : const int bSuccess = psATInfo->pfnBaseTransformer(
4120 : psATInfo->pBaseCBData, bDstToSrc, 3, x2, y2, z2, anSuccess2);
4121 : CPLAssert(bSuccess);
4122 : CPLAssert(anSuccess2[0]);
4123 : CPLAssert(anSuccess2[1]);
4124 : CPLAssert(anSuccess2[2]);
4125 : CPLAssert(x2[0] == xSMETransformed[0]);
4126 : CPLAssert(y2[0] == ySMETransformed[0]);
4127 : CPLAssert(z2[0] == zSMETransformed[0]);
4128 : CPLAssert(x2[1] == xSMETransformed[1]);
4129 : CPLAssert(y2[1] == ySMETransformed[1]);
4130 : CPLAssert(z2[1] == zSMETransformed[1]);
4131 : CPLAssert(x2[2] == xSMETransformed[2]);
4132 : CPLAssert(y2[2] == ySMETransformed[2]);
4133 : CPLAssert(z2[2] == zSMETransformed[2]);
4134 : }
4135 : #endif
4136 :
4137 : #ifdef DEBUG_APPROX_TRANSFORMER
4138 : fprintf(stderr, "start (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4139 : x[0], y[0], xSMETransformed[0], ySMETransformed[0]);
4140 : fprintf(stderr, "middle (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4141 : x[nMiddle], y[nMiddle], xSMETransformed[1], ySMETransformed[1]);
4142 : fprintf(stderr, "end (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4143 : x[nPoints - 1], y[nPoints - 1], xSMETransformed[2],
4144 : ySMETransformed[2]);
4145 : #endif
4146 :
4147 : /* -------------------------------------------------------------------- */
4148 : /* Is the error at the middle acceptable relative to an */
4149 : /* interpolation of the middle position? */
4150 : /* -------------------------------------------------------------------- */
4151 1287130 : const double dfDeltaX =
4152 1287130 : (xSMETransformed[2] - xSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4153 1287130 : const double dfDeltaY =
4154 1287130 : (ySMETransformed[2] - ySMETransformed[0]) / (x[nPoints - 1] - x[0]);
4155 1287130 : const double dfDeltaZ =
4156 1287130 : (zSMETransformed[2] - zSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4157 :
4158 1287130 : const double dfError =
4159 1287130 : fabs((xSMETransformed[0] + dfDeltaX * (x[nMiddle] - x[0])) -
4160 1287130 : xSMETransformed[1]) +
4161 1287130 : fabs((ySMETransformed[0] + dfDeltaY * (x[nMiddle] - x[0])) -
4162 1287130 : ySMETransformed[1]);
4163 :
4164 1287130 : const double dfMaxError =
4165 1287130 : (bDstToSrc) ? psATInfo->dfMaxErrorReverse : psATInfo->dfMaxErrorForward;
4166 1287130 : if (dfError > dfMaxError)
4167 : {
4168 : #if DEBUG_VERBOSE
4169 : CPLDebug("GDAL",
4170 : "ApproxTransformer - "
4171 : "error %g over threshold %g, subdivide %d points.",
4172 : dfError, dfMaxError, nPoints);
4173 : #endif
4174 :
4175 596079 : double xMiddle[3] = {x[(nMiddle - 1) / 2], x[nMiddle - 1],
4176 596079 : x[nMiddle + (nPoints - nMiddle - 1) / 2]};
4177 596079 : double yMiddle[3] = {y[(nMiddle - 1) / 2], y[nMiddle - 1],
4178 596079 : y[nMiddle + (nPoints - nMiddle - 1) / 2]};
4179 596079 : double zMiddle[3] = {z[(nMiddle - 1) / 2], z[nMiddle - 1],
4180 596079 : z[nMiddle + (nPoints - nMiddle - 1) / 2]};
4181 :
4182 596079 : const bool bUseBaseTransformForHalf1 =
4183 467262 : nMiddle <= 5 || y[0] != y[nMiddle - 1] ||
4184 1530600 : y[0] != y[(nMiddle - 1) / 2] || x[0] == x[nMiddle - 1] ||
4185 467262 : x[0] == x[(nMiddle - 1) / 2];
4186 596079 : const bool bUseBaseTransformForHalf2 =
4187 481397 : nPoints - nMiddle <= 5 || y[nMiddle] != y[nPoints - 1] ||
4188 481397 : y[nMiddle] != y[nMiddle + (nPoints - nMiddle - 1) / 2] ||
4189 1558870 : x[nMiddle] == x[nPoints - 1] ||
4190 481397 : x[nMiddle] == x[nMiddle + (nPoints - nMiddle - 1) / 2];
4191 :
4192 596079 : int anSuccess2[3] = {};
4193 596079 : int bSuccess = FALSE;
4194 596079 : if (!bUseBaseTransformForHalf1 && !bUseBaseTransformForHalf2)
4195 467262 : bSuccess = psATInfo->pfnBaseTransformer(
4196 : psATInfo->pBaseCBData, bDstToSrc, 3, xMiddle, yMiddle, zMiddle,
4197 : anSuccess2);
4198 128817 : else if (!bUseBaseTransformForHalf1)
4199 : {
4200 0 : bSuccess = psATInfo->pfnBaseTransformer(
4201 : psATInfo->pBaseCBData, bDstToSrc, 2, xMiddle, yMiddle, zMiddle,
4202 : anSuccess2);
4203 0 : anSuccess2[2] = TRUE;
4204 : }
4205 128817 : else if (!bUseBaseTransformForHalf2)
4206 : {
4207 14135 : bSuccess = psATInfo->pfnBaseTransformer(
4208 : psATInfo->pBaseCBData, bDstToSrc, 1, xMiddle + 2, yMiddle + 2,
4209 : zMiddle + 2, anSuccess2 + 2);
4210 14135 : anSuccess2[0] = TRUE;
4211 14135 : anSuccess2[1] = TRUE;
4212 : }
4213 :
4214 596079 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4215 : {
4216 114698 : bSuccess = psATInfo->pfnBaseTransformer(
4217 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4218 : z + 1, panSuccess + 1);
4219 229396 : bSuccess &= psATInfo->pfnBaseTransformer(
4220 114698 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4221 114698 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4222 114698 : panSuccess + nMiddle + 1);
4223 :
4224 114698 : x[0] = xSMETransformed[0];
4225 114698 : y[0] = ySMETransformed[0];
4226 114698 : z[0] = zSMETransformed[0];
4227 114698 : panSuccess[0] = TRUE;
4228 114698 : x[nMiddle] = xSMETransformed[1];
4229 114698 : y[nMiddle] = ySMETransformed[1];
4230 114698 : z[nMiddle] = zSMETransformed[1];
4231 114698 : panSuccess[nMiddle] = TRUE;
4232 114698 : x[nPoints - 1] = xSMETransformed[2];
4233 114698 : y[nPoints - 1] = ySMETransformed[2];
4234 114698 : z[nPoints - 1] = zSMETransformed[2];
4235 114698 : panSuccess[nPoints - 1] = TRUE;
4236 114698 : return bSuccess;
4237 : }
4238 :
4239 481381 : double x2[3] = {};
4240 481381 : double y2[3] = {};
4241 481381 : double z2[3] = {};
4242 481381 : if (!bUseBaseTransformForHalf1)
4243 : {
4244 467246 : x2[0] = xSMETransformed[0];
4245 467246 : y2[0] = ySMETransformed[0];
4246 467246 : z2[0] = zSMETransformed[0];
4247 467246 : x2[1] = xMiddle[0];
4248 467246 : y2[1] = yMiddle[0];
4249 467246 : z2[1] = zMiddle[0];
4250 467246 : x2[2] = xMiddle[1];
4251 467246 : y2[2] = yMiddle[1];
4252 467246 : z2[2] = zMiddle[1];
4253 :
4254 467246 : bSuccess = GDALApproxTransformInternal(
4255 : psATInfo, bDstToSrc, nMiddle, x, y, z, panSuccess, x2, y2, z2);
4256 : }
4257 : else
4258 : {
4259 14135 : bSuccess = psATInfo->pfnBaseTransformer(
4260 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4261 : z + 1, panSuccess + 1);
4262 14135 : x[0] = xSMETransformed[0];
4263 14135 : y[0] = ySMETransformed[0];
4264 14135 : z[0] = zSMETransformed[0];
4265 14135 : panSuccess[0] = TRUE;
4266 : }
4267 :
4268 481381 : if (!bSuccess)
4269 24 : return FALSE;
4270 :
4271 481357 : if (!bUseBaseTransformForHalf2)
4272 : {
4273 481357 : x2[0] = xSMETransformed[1];
4274 481357 : y2[0] = ySMETransformed[1];
4275 481357 : z2[0] = zSMETransformed[1];
4276 481357 : x2[1] = xMiddle[2];
4277 481357 : y2[1] = yMiddle[2];
4278 481357 : z2[1] = zMiddle[2];
4279 481357 : x2[2] = xSMETransformed[2];
4280 481357 : y2[2] = ySMETransformed[2];
4281 481357 : z2[2] = zSMETransformed[2];
4282 :
4283 481357 : bSuccess = GDALApproxTransformInternal(
4284 481357 : psATInfo, bDstToSrc, nPoints - nMiddle, x + nMiddle,
4285 481357 : y + nMiddle, z + nMiddle, panSuccess + nMiddle, x2, y2, z2);
4286 : }
4287 : else
4288 : {
4289 0 : bSuccess = psATInfo->pfnBaseTransformer(
4290 0 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4291 0 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4292 0 : panSuccess + nMiddle + 1);
4293 :
4294 0 : x[nMiddle] = xSMETransformed[1];
4295 0 : y[nMiddle] = ySMETransformed[1];
4296 0 : z[nMiddle] = zSMETransformed[1];
4297 0 : panSuccess[nMiddle] = TRUE;
4298 0 : x[nPoints - 1] = xSMETransformed[2];
4299 0 : y[nPoints - 1] = ySMETransformed[2];
4300 0 : z[nPoints - 1] = zSMETransformed[2];
4301 0 : panSuccess[nPoints - 1] = TRUE;
4302 : }
4303 :
4304 481357 : if (!bSuccess)
4305 2 : return FALSE;
4306 :
4307 481355 : return TRUE;
4308 : }
4309 :
4310 : /* -------------------------------------------------------------------- */
4311 : /* Error is OK since this is just used to compute output bounds */
4312 : /* of newly created file for gdalwarper. So just use affine */
4313 : /* approximation of the reverse transform. Eventually we */
4314 : /* should implement iterative searching to find a result within */
4315 : /* our error threshold. */
4316 : /* NOTE: the above comment is not true: gdalwarp uses approximator */
4317 : /* also to compute the source pixel of each target pixel. */
4318 : /* -------------------------------------------------------------------- */
4319 139737000 : for (int i = nPoints - 1; i >= 0; i--)
4320 : {
4321 : #ifdef check_error
4322 : double xtemp = x[i];
4323 : double ytemp = y[i];
4324 : double ztemp = z[i];
4325 : double x_ori = xtemp;
4326 : double y_ori = ytemp;
4327 : int btemp = FALSE;
4328 : psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 1,
4329 : &xtemp, &ytemp, &ztemp, &btemp);
4330 : #endif
4331 139046000 : const double dfDist = (x[i] - x[0]);
4332 139046000 : x[i] = xSMETransformed[0] + dfDeltaX * dfDist;
4333 139046000 : y[i] = ySMETransformed[0] + dfDeltaY * dfDist;
4334 139046000 : z[i] = zSMETransformed[0] + dfDeltaZ * dfDist;
4335 : #ifdef check_error
4336 : const double dfError2 = fabs(x[i] - xtemp) + fabs(y[i] - ytemp);
4337 : if (dfError2 > 4 /*10 * dfMaxError*/)
4338 : {
4339 : /*ok*/ printf("Error = %f on (%f, %f)\n", dfError2, x_ori, y_ori);
4340 : }
4341 : #endif
4342 139046000 : panSuccess[i] = TRUE;
4343 : }
4344 :
4345 691050 : return TRUE;
4346 : }
4347 :
4348 : /************************************************************************/
4349 : /* GDALApproxTransform() */
4350 : /************************************************************************/
4351 :
4352 : /**
4353 : * Perform approximate transformation.
4354 : *
4355 : * Actually performs the approximate transformation described in
4356 : * GDALCreateApproxTransformer(). This function matches the
4357 : * GDALTransformerFunc() signature. Details of the arguments are described
4358 : * there.
4359 : */
4360 :
4361 761339 : int GDALApproxTransform(void *pCBData, int bDstToSrc, int nPoints, double *x,
4362 : double *y, double *z, int *panSuccess)
4363 :
4364 : {
4365 761339 : GDALApproxTransformInfo *psATInfo =
4366 : static_cast<GDALApproxTransformInfo *>(pCBData);
4367 761339 : double x2[3] = {};
4368 761339 : double y2[3] = {};
4369 761339 : double z2[3] = {};
4370 761339 : int anSuccess2[3] = {};
4371 : int bSuccess;
4372 :
4373 761339 : const int nMiddle = (nPoints - 1) / 2;
4374 :
4375 : /* -------------------------------------------------------------------- */
4376 : /* Bail if our preconditions are not met, or if error is not */
4377 : /* acceptable. */
4378 : /* -------------------------------------------------------------------- */
4379 761339 : int bRet = FALSE;
4380 761339 : if (y[0] != y[nPoints - 1] || y[0] != y[nMiddle] ||
4381 751719 : x[0] == x[nPoints - 1] || x[0] == x[nMiddle] ||
4382 344372 : (psATInfo->dfMaxErrorForward == 0.0 &&
4383 344372 : psATInfo->dfMaxErrorReverse == 0.0) ||
4384 : nPoints <= 5)
4385 : {
4386 417390 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4387 : nPoints, x, y, z, panSuccess);
4388 417388 : goto end;
4389 : }
4390 :
4391 : /* -------------------------------------------------------------------- */
4392 : /* Transform first, last and middle point. */
4393 : /* -------------------------------------------------------------------- */
4394 343949 : x2[0] = x[0];
4395 343949 : y2[0] = y[0];
4396 343949 : z2[0] = z[0];
4397 343949 : x2[1] = x[nMiddle];
4398 343949 : y2[1] = y[nMiddle];
4399 343949 : z2[1] = z[nMiddle];
4400 343949 : x2[2] = x[nPoints - 1];
4401 343949 : y2[2] = y[nPoints - 1];
4402 343949 : z2[2] = z[nPoints - 1];
4403 :
4404 343949 : bSuccess = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 3,
4405 : x2, y2, z2, anSuccess2);
4406 343948 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4407 : {
4408 5450 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4409 : nPoints, x, y, z, panSuccess);
4410 5416 : goto end;
4411 : }
4412 :
4413 338498 : bRet = GDALApproxTransformInternal(pCBData, bDstToSrc, nPoints, x, y, z,
4414 : panSuccess, x2, y2, z2);
4415 :
4416 761336 : end:
4417 : #ifdef DEBUG_APPROX_TRANSFORMER
4418 : for (int i = 0; i < nPoints; i++)
4419 : fprintf(stderr, "[%d] (%.10f,%.10f) %d\n", /*ok*/
4420 : i, x[i], y[i], panSuccess[i]);
4421 : #endif
4422 :
4423 761336 : return bRet;
4424 : }
4425 :
4426 : /************************************************************************/
4427 : /* GDALDeserializeApproxTransformer() */
4428 : /************************************************************************/
4429 :
4430 151 : static void *GDALDeserializeApproxTransformer(CPLXMLNode *psTree)
4431 :
4432 : {
4433 151 : double dfMaxErrorForward = 0.25;
4434 151 : double dfMaxErrorReverse = 0.25;
4435 151 : const char *pszMaxError = CPLGetXMLValue(psTree, "MaxError", nullptr);
4436 151 : if (pszMaxError != nullptr)
4437 : {
4438 149 : dfMaxErrorForward = CPLAtof(pszMaxError);
4439 149 : dfMaxErrorReverse = dfMaxErrorForward;
4440 : }
4441 : const char *pszMaxErrorForward =
4442 151 : CPLGetXMLValue(psTree, "MaxErrorForward", nullptr);
4443 151 : if (pszMaxErrorForward != nullptr)
4444 : {
4445 2 : dfMaxErrorForward = CPLAtof(pszMaxErrorForward);
4446 : }
4447 : const char *pszMaxErrorReverse =
4448 151 : CPLGetXMLValue(psTree, "MaxErrorReverse", nullptr);
4449 151 : if (pszMaxErrorReverse != nullptr)
4450 : {
4451 2 : dfMaxErrorReverse = CPLAtof(pszMaxErrorReverse);
4452 : }
4453 :
4454 151 : GDALTransformerFunc pfnBaseTransform = nullptr;
4455 151 : void *pBaseCBData = nullptr;
4456 :
4457 151 : CPLXMLNode *psContainer = CPLGetXMLNode(psTree, "BaseTransformer");
4458 :
4459 151 : if (psContainer != nullptr && psContainer->psChild != nullptr)
4460 : {
4461 151 : GDALDeserializeTransformer(psContainer->psChild, &pfnBaseTransform,
4462 : &pBaseCBData);
4463 : }
4464 :
4465 151 : if (pfnBaseTransform == nullptr)
4466 : {
4467 0 : CPLError(CE_Failure, CPLE_AppDefined,
4468 : "Cannot get base transform for approx transformer.");
4469 0 : return nullptr;
4470 : }
4471 :
4472 151 : void *pApproxCBData = GDALCreateApproxTransformer2(
4473 : pfnBaseTransform, pBaseCBData, dfMaxErrorForward, dfMaxErrorReverse);
4474 151 : GDALApproxTransformerOwnsSubtransformer(pApproxCBData, TRUE);
4475 :
4476 151 : return pApproxCBData;
4477 : }
4478 :
4479 : /************************************************************************/
4480 : /* GDALTransformLonLatToDestApproxTransformer() */
4481 : /************************************************************************/
4482 :
4483 2584 : int GDALTransformLonLatToDestApproxTransformer(void *hTransformArg,
4484 : double *pdfX, double *pdfY)
4485 : {
4486 2584 : GDALApproxTransformInfo *psInfo =
4487 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4488 :
4489 2584 : if (GDALIsTransformer(psInfo->pBaseCBData,
4490 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4491 : {
4492 2584 : return GDALTransformLonLatToDestGenImgProjTransformer(
4493 2584 : psInfo->pBaseCBData, pdfX, pdfY);
4494 : }
4495 0 : return false;
4496 : }
4497 :
4498 : /************************************************************************/
4499 : /* GDALApplyGeoTransform() */
4500 : /************************************************************************/
4501 :
4502 : /**
4503 : * Apply GeoTransform to x/y coordinate.
4504 : *
4505 : * Applies the following computation, converting a (pixel, line) coordinate
4506 : * into a georeferenced (geo_x, geo_y) location.
4507 : * \code{.c}
4508 : * *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1]
4509 : * + dfLine * padfGeoTransform[2];
4510 : * *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4]
4511 : * + dfLine * padfGeoTransform[5];
4512 : * \endcode
4513 : *
4514 : * @param padfGeoTransform Six coefficient GeoTransform to apply.
4515 : * @param dfPixel Input pixel position.
4516 : * @param dfLine Input line position.
4517 : * @param pdfGeoX output location where geo_x (easting/longitude)
4518 : * location is placed.
4519 : * @param pdfGeoY output location where geo_y (northing/latitude)
4520 : * location is placed.
4521 : */
4522 :
4523 311010 : void CPL_STDCALL GDALApplyGeoTransform(const double *padfGeoTransform,
4524 : double dfPixel, double dfLine,
4525 : double *pdfGeoX, double *pdfGeoY)
4526 : {
4527 311010 : *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1] +
4528 311010 : dfLine * padfGeoTransform[2];
4529 311010 : *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4] +
4530 311010 : dfLine * padfGeoTransform[5];
4531 311010 : }
4532 :
4533 : /************************************************************************/
4534 : /* GDALInvGeoTransform() */
4535 : /************************************************************************/
4536 :
4537 : /**
4538 : * Invert Geotransform.
4539 : *
4540 : * This function will invert a standard 3x2 set of GeoTransform coefficients.
4541 : * This converts the equation from being pixel to geo to being geo to pixel.
4542 : *
4543 : * @param gt_in Input geotransform (six doubles - unaltered).
4544 : * @param gt_out Output geotransform (six doubles - updated).
4545 : *
4546 : * @return TRUE on success or FALSE if the equation is uninvertable.
4547 : */
4548 :
4549 3413 : int CPL_STDCALL GDALInvGeoTransform(const double *gt_in, double *gt_out)
4550 :
4551 : {
4552 : // Special case - no rotation - to avoid computing determinate
4553 : // and potential precision issues.
4554 3413 : if (gt_in[2] == 0.0 && gt_in[4] == 0.0 && gt_in[1] != 0.0 &&
4555 3356 : gt_in[5] != 0.0)
4556 : {
4557 : /*X = gt_in[0] + x * gt_in[1]
4558 : Y = gt_in[3] + y * gt_in[5]
4559 : -->
4560 : x = -gt_in[0] / gt_in[1] + (1 / gt_in[1]) * X
4561 : y = -gt_in[3] / gt_in[5] + (1 / gt_in[5]) * Y
4562 : */
4563 3356 : gt_out[0] = -gt_in[0] / gt_in[1];
4564 3356 : gt_out[1] = 1.0 / gt_in[1];
4565 3356 : gt_out[2] = 0.0;
4566 3356 : gt_out[3] = -gt_in[3] / gt_in[5];
4567 3356 : gt_out[4] = 0.0;
4568 3356 : gt_out[5] = 1.0 / gt_in[5];
4569 3356 : return 1;
4570 : }
4571 :
4572 : // Assume a 3rd row that is [1 0 0].
4573 :
4574 : // Compute determinate.
4575 :
4576 57 : const double det = gt_in[1] * gt_in[5] - gt_in[2] * gt_in[4];
4577 114 : const double magnitude = std::max(std::max(fabs(gt_in[1]), fabs(gt_in[2])),
4578 57 : std::max(fabs(gt_in[4]), fabs(gt_in[5])));
4579 :
4580 57 : if (fabs(det) <= 1e-10 * magnitude * magnitude)
4581 8 : return 0;
4582 :
4583 49 : const double inv_det = 1.0 / det;
4584 :
4585 : // Compute adjoint, and divide by determinate.
4586 :
4587 49 : gt_out[1] = gt_in[5] * inv_det;
4588 49 : gt_out[4] = -gt_in[4] * inv_det;
4589 :
4590 49 : gt_out[2] = -gt_in[2] * inv_det;
4591 49 : gt_out[5] = gt_in[1] * inv_det;
4592 :
4593 49 : gt_out[0] = (gt_in[2] * gt_in[3] - gt_in[0] * gt_in[5]) * inv_det;
4594 49 : gt_out[3] = (-gt_in[1] * gt_in[3] + gt_in[0] * gt_in[4]) * inv_det;
4595 :
4596 49 : return 1;
4597 : }
4598 :
4599 : /************************************************************************/
4600 : /* GDALSerializeTransformer() */
4601 : /************************************************************************/
4602 :
4603 269 : CPLXMLNode *GDALSerializeTransformer(GDALTransformerFunc /* pfnFunc */,
4604 : void *pTransformArg)
4605 : {
4606 269 : VALIDATE_POINTER1(pTransformArg, "GDALSerializeTransformer", nullptr);
4607 :
4608 269 : GDALTransformerInfo *psInfo =
4609 : static_cast<GDALTransformerInfo *>(pTransformArg);
4610 :
4611 269 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4612 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4613 : {
4614 0 : CPLError(CE_Failure, CPLE_AppDefined,
4615 : "Attempt to serialize non-GTI2 transformer.");
4616 0 : return nullptr;
4617 : }
4618 269 : else if (psInfo->pfnSerialize == nullptr)
4619 : {
4620 0 : CPLError(CE_Failure, CPLE_AppDefined,
4621 : "No serialization function available for this transformer.");
4622 0 : return nullptr;
4623 : }
4624 :
4625 269 : return psInfo->pfnSerialize(pTransformArg);
4626 : }
4627 :
4628 : /************************************************************************/
4629 : /* GDALRegisterTransformDeserializer() */
4630 : /************************************************************************/
4631 :
4632 : static CPLList *psListDeserializer = nullptr;
4633 : static CPLMutex *hDeserializerMutex = nullptr;
4634 :
4635 : typedef struct
4636 : {
4637 : char *pszTransformName;
4638 : GDALTransformerFunc pfnTransformerFunc;
4639 : GDALTransformDeserializeFunc pfnDeserializeFunc;
4640 : } TransformDeserializerInfo;
4641 :
4642 0 : void *GDALRegisterTransformDeserializer(
4643 : const char *pszTransformName, GDALTransformerFunc pfnTransformerFunc,
4644 : GDALTransformDeserializeFunc pfnDeserializeFunc)
4645 : {
4646 : TransformDeserializerInfo *psInfo =
4647 : static_cast<TransformDeserializerInfo *>(
4648 0 : CPLMalloc(sizeof(TransformDeserializerInfo)));
4649 0 : psInfo->pszTransformName = CPLStrdup(pszTransformName);
4650 0 : psInfo->pfnTransformerFunc = pfnTransformerFunc;
4651 0 : psInfo->pfnDeserializeFunc = pfnDeserializeFunc;
4652 :
4653 0 : CPLMutexHolderD(&hDeserializerMutex);
4654 0 : psListDeserializer = CPLListInsert(psListDeserializer, psInfo, 0);
4655 :
4656 0 : return psInfo;
4657 : }
4658 :
4659 : /************************************************************************/
4660 : /* GDALUnregisterTransformDeserializer() */
4661 : /************************************************************************/
4662 :
4663 0 : void GDALUnregisterTransformDeserializer(void *pData)
4664 : {
4665 0 : CPLMutexHolderD(&hDeserializerMutex);
4666 0 : CPLList *psList = psListDeserializer;
4667 0 : CPLList *psLast = nullptr;
4668 0 : while (psList)
4669 : {
4670 0 : if (psList->pData == pData)
4671 : {
4672 0 : TransformDeserializerInfo *psInfo =
4673 : static_cast<TransformDeserializerInfo *>(pData);
4674 0 : CPLFree(psInfo->pszTransformName);
4675 0 : CPLFree(pData);
4676 0 : if (psLast)
4677 0 : psLast->psNext = psList->psNext;
4678 : else
4679 0 : psListDeserializer = nullptr;
4680 0 : CPLFree(psList);
4681 0 : break;
4682 : }
4683 0 : psLast = psList;
4684 0 : psList = psList->psNext;
4685 : }
4686 0 : }
4687 :
4688 : /************************************************************************/
4689 : /* GDALUnregisterTransformDeserializer() */
4690 : /************************************************************************/
4691 :
4692 1121 : void GDALCleanupTransformDeserializerMutex()
4693 : {
4694 1121 : if (hDeserializerMutex != nullptr)
4695 : {
4696 0 : CPLDestroyMutex(hDeserializerMutex);
4697 0 : hDeserializerMutex = nullptr;
4698 : }
4699 1121 : }
4700 :
4701 : /************************************************************************/
4702 : /* GDALDeserializeTransformer() */
4703 : /************************************************************************/
4704 :
4705 568 : CPLErr GDALDeserializeTransformer(CPLXMLNode *psTree,
4706 : GDALTransformerFunc *ppfnFunc,
4707 : void **ppTransformArg)
4708 :
4709 : {
4710 568 : *ppfnFunc = nullptr;
4711 568 : *ppTransformArg = nullptr;
4712 :
4713 568 : CPLErrorReset();
4714 :
4715 568 : if (psTree == nullptr || psTree->eType != CXT_Element)
4716 0 : CPLError(CE_Failure, CPLE_AppDefined,
4717 : "Malformed element in GDALDeserializeTransformer");
4718 568 : else if (EQUAL(psTree->pszValue, "GenImgProjTransformer"))
4719 : {
4720 199 : *ppfnFunc = GDALGenImgProjTransform;
4721 199 : *ppTransformArg = GDALDeserializeGenImgProjTransformer(psTree);
4722 : }
4723 369 : else if (EQUAL(psTree->pszValue, "ReprojectionTransformer"))
4724 : {
4725 202 : *ppfnFunc = GDALReprojectionTransform;
4726 202 : *ppTransformArg = GDALDeserializeReprojectionTransformer(psTree);
4727 : }
4728 167 : else if (EQUAL(psTree->pszValue, "GCPTransformer"))
4729 : {
4730 5 : *ppfnFunc = GDALGCPTransform;
4731 5 : *ppTransformArg = GDALDeserializeGCPTransformer(psTree);
4732 : }
4733 162 : else if (EQUAL(psTree->pszValue, "TPSTransformer"))
4734 : {
4735 3 : *ppfnFunc = GDALTPSTransform;
4736 3 : *ppTransformArg = GDALDeserializeTPSTransformer(psTree);
4737 : }
4738 159 : else if (EQUAL(psTree->pszValue, "GeoLocTransformer"))
4739 : {
4740 1 : *ppfnFunc = GDALGeoLocTransform;
4741 1 : *ppTransformArg = GDALDeserializeGeoLocTransformer(psTree);
4742 : }
4743 158 : else if (EQUAL(psTree->pszValue, "RPCTransformer"))
4744 : {
4745 0 : *ppfnFunc = GDALRPCTransform;
4746 0 : *ppTransformArg = GDALDeserializeRPCTransformer(psTree);
4747 : }
4748 158 : else if (EQUAL(psTree->pszValue, "ApproxTransformer"))
4749 : {
4750 151 : *ppfnFunc = GDALApproxTransform;
4751 151 : *ppTransformArg = GDALDeserializeApproxTransformer(psTree);
4752 : }
4753 7 : else if (EQUAL(psTree->pszValue, "HomographyTransformer"))
4754 : {
4755 7 : *ppfnFunc = GDALHomographyTransform;
4756 7 : *ppTransformArg = GDALDeserializeHomographyTransformer(psTree);
4757 : }
4758 : else
4759 : {
4760 0 : GDALTransformDeserializeFunc pfnDeserializeFunc = nullptr;
4761 : {
4762 0 : CPLMutexHolderD(&hDeserializerMutex);
4763 0 : CPLList *psList = psListDeserializer;
4764 0 : while (psList)
4765 : {
4766 0 : TransformDeserializerInfo *psInfo =
4767 : static_cast<TransformDeserializerInfo *>(psList->pData);
4768 0 : if (strcmp(psInfo->pszTransformName, psTree->pszValue) == 0)
4769 : {
4770 0 : *ppfnFunc = psInfo->pfnTransformerFunc;
4771 0 : pfnDeserializeFunc = psInfo->pfnDeserializeFunc;
4772 0 : break;
4773 : }
4774 0 : psList = psList->psNext;
4775 : }
4776 : }
4777 :
4778 0 : if (pfnDeserializeFunc != nullptr)
4779 : {
4780 0 : *ppTransformArg = pfnDeserializeFunc(psTree);
4781 : }
4782 : else
4783 : {
4784 0 : CPLError(CE_Failure, CPLE_AppDefined,
4785 : "Unrecognized element '%s' GDALDeserializeTransformer",
4786 : psTree->pszValue);
4787 : }
4788 : }
4789 :
4790 568 : return CPLGetLastErrorType();
4791 : }
4792 :
4793 : /************************************************************************/
4794 : /* GDALDestroyTransformer() */
4795 : /************************************************************************/
4796 :
4797 4474 : void GDALDestroyTransformer(void *pTransformArg)
4798 :
4799 : {
4800 4474 : if (pTransformArg == nullptr)
4801 0 : return;
4802 :
4803 4474 : GDALTransformerInfo *psInfo =
4804 : static_cast<GDALTransformerInfo *>(pTransformArg);
4805 :
4806 4474 : if (memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4807 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4808 : {
4809 0 : CPLError(CE_Failure, CPLE_AppDefined,
4810 : "Attempt to destroy non-GTI2 transformer.");
4811 0 : return;
4812 : }
4813 :
4814 4474 : psInfo->pfnCleanup(pTransformArg);
4815 : }
4816 :
4817 : /************************************************************************/
4818 : /* GDALUseTransformer() */
4819 : /************************************************************************/
4820 :
4821 8683 : int GDALUseTransformer(void *pTransformArg, int bDstToSrc, int nPointCount,
4822 : double *x, double *y, double *z, int *panSuccess)
4823 : {
4824 8683 : GDALTransformerInfo *psInfo =
4825 : static_cast<GDALTransformerInfo *>(pTransformArg);
4826 :
4827 8683 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4828 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4829 : {
4830 0 : CPLError(CE_Failure, CPLE_AppDefined,
4831 : "Attempt to use non-GTI2 transformer.");
4832 0 : return FALSE;
4833 : }
4834 :
4835 8683 : return psInfo->pfnTransform(pTransformArg, bDstToSrc, nPointCount, x, y, z,
4836 8683 : panSuccess);
4837 : }
4838 :
4839 : /************************************************************************/
4840 : /* GDALCloneTransformer() */
4841 : /************************************************************************/
4842 :
4843 71 : void *GDALCloneTransformer(void *pTransformArg)
4844 : {
4845 71 : GDALTransformerInfo *psInfo =
4846 : static_cast<GDALTransformerInfo *>(pTransformArg);
4847 :
4848 71 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4849 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4850 : {
4851 0 : CPLError(CE_Failure, CPLE_AppDefined,
4852 : "Attempt to clone non-GTI2 transformer.");
4853 0 : return nullptr;
4854 : }
4855 :
4856 71 : if (psInfo->pfnCreateSimilar != nullptr)
4857 : {
4858 36 : return psInfo->pfnCreateSimilar(psInfo, 1.0, 1.0);
4859 : }
4860 :
4861 35 : if (psInfo->pfnSerialize == nullptr)
4862 : {
4863 0 : CPLError(CE_Failure, CPLE_AppDefined,
4864 : "No serialization function available for this transformer.");
4865 0 : return nullptr;
4866 : }
4867 :
4868 35 : CPLXMLNode *pSerialized = psInfo->pfnSerialize(pTransformArg);
4869 35 : if (pSerialized == nullptr)
4870 0 : return nullptr;
4871 35 : GDALTransformerFunc pfnTransformer = nullptr;
4872 35 : void *pClonedTransformArg = nullptr;
4873 35 : if (GDALDeserializeTransformer(pSerialized, &pfnTransformer,
4874 35 : &pClonedTransformArg) != CE_None)
4875 : {
4876 0 : CPLDestroyXMLNode(pSerialized);
4877 0 : CPLFree(pClonedTransformArg);
4878 0 : return nullptr;
4879 : }
4880 :
4881 35 : CPLDestroyXMLNode(pSerialized);
4882 35 : return pClonedTransformArg;
4883 : }
4884 :
4885 : /************************************************************************/
4886 : /* GDALCreateSimilarTransformer() */
4887 : /************************************************************************/
4888 :
4889 68 : void *GDALCreateSimilarTransformer(void *pTransformArg, double dfRatioX,
4890 : double dfRatioY)
4891 : {
4892 68 : GDALTransformerInfo *psInfo =
4893 : static_cast<GDALTransformerInfo *>(pTransformArg);
4894 :
4895 68 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4896 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4897 : {
4898 0 : CPLError(CE_Failure, CPLE_AppDefined,
4899 : "Attempt to call CreateSimilar on a non-GTI2 transformer.");
4900 0 : return nullptr;
4901 : }
4902 :
4903 68 : if (psInfo->pfnCreateSimilar == nullptr)
4904 : {
4905 0 : CPLError(CE_Failure, CPLE_AppDefined,
4906 : "No CreateSimilar function available for this transformer.");
4907 0 : return nullptr;
4908 : }
4909 :
4910 68 : return psInfo->pfnCreateSimilar(psInfo, dfRatioX, dfRatioY);
4911 : }
4912 :
4913 : /************************************************************************/
4914 : /* GetGenImgProjTransformInfo() */
4915 : /************************************************************************/
4916 :
4917 44 : static GDALTransformerInfo *GetGenImgProjTransformInfo(const char *pszFunc,
4918 : void *pTransformArg)
4919 : {
4920 44 : GDALTransformerInfo *psInfo =
4921 : static_cast<GDALTransformerInfo *>(pTransformArg);
4922 :
4923 44 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4924 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4925 : {
4926 0 : CPLError(CE_Failure, CPLE_AppDefined,
4927 : "Attempt to call %s on "
4928 : "a non-GTI2 transformer.",
4929 : pszFunc);
4930 0 : return nullptr;
4931 : }
4932 :
4933 44 : if (EQUAL(psInfo->pszClassName, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
4934 : {
4935 14 : GDALApproxTransformInfo *psATInfo =
4936 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
4937 14 : psInfo = static_cast<GDALTransformerInfo *>(psATInfo->pBaseCBData);
4938 :
4939 14 : if (psInfo == nullptr ||
4940 14 : memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4941 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4942 : {
4943 0 : CPLError(CE_Failure, CPLE_AppDefined,
4944 : "Attempt to call %s on "
4945 : "a non-GTI2 transformer.",
4946 : pszFunc);
4947 0 : return nullptr;
4948 : }
4949 : }
4950 :
4951 44 : if (EQUAL(psInfo->pszClassName, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4952 : {
4953 44 : return psInfo;
4954 : }
4955 :
4956 0 : return nullptr;
4957 : }
4958 :
4959 : /************************************************************************/
4960 : /* GDALSetTransformerDstGeoTransform() */
4961 : /************************************************************************/
4962 :
4963 : /**
4964 : * Set ApproxTransformer or GenImgProj output geotransform.
4965 : *
4966 : * This is a layer above GDALSetGenImgProjTransformerDstGeoTransform() that
4967 : * checks that the passed hTransformArg is compatible.
4968 : *
4969 : * Normally the "destination geotransform", or transformation between
4970 : * georeferenced output coordinates and pixel/line coordinates on the
4971 : * destination file is extracted from the destination file by
4972 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
4973 : * info. However, sometimes it is inconvenient to have an output file
4974 : * handle with appropriate geotransform information when creating the
4975 : * transformation. For these cases, this function can be used to apply
4976 : * the destination geotransform.
4977 : *
4978 : * @param pTransformArg the handle to update.
4979 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
4980 : */
4981 :
4982 22 : void GDALSetTransformerDstGeoTransform(void *pTransformArg,
4983 : const double *padfGeoTransform)
4984 : {
4985 22 : VALIDATE_POINTER0(pTransformArg, "GDALSetTransformerDstGeoTransform");
4986 :
4987 22 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
4988 : "GDALSetTransformerDstGeoTransform", pTransformArg);
4989 22 : if (psInfo)
4990 : {
4991 22 : GDALSetGenImgProjTransformerDstGeoTransform(psInfo, padfGeoTransform);
4992 : }
4993 : }
4994 :
4995 : /************************************************************************/
4996 : /* GDALGetTransformerDstGeoTransform() */
4997 : /************************************************************************/
4998 :
4999 : /**
5000 : * Get ApproxTransformer or GenImgProj output geotransform.
5001 : *
5002 : * @param pTransformArg transformer handle.
5003 : * @param padfGeoTransform (output) the destination geotransform to return (six
5004 : * doubles).
5005 : */
5006 :
5007 22 : void GDALGetTransformerDstGeoTransform(void *pTransformArg,
5008 : double *padfGeoTransform)
5009 : {
5010 22 : VALIDATE_POINTER0(pTransformArg, "GDALGetTransformerDstGeoTransform");
5011 :
5012 22 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
5013 : "GDALGetTransformerDstGeoTransform", pTransformArg);
5014 22 : if (psInfo)
5015 : {
5016 22 : GDALGenImgProjTransformInfo *psGenImgProjInfo =
5017 : reinterpret_cast<GDALGenImgProjTransformInfo *>(psInfo);
5018 :
5019 22 : memcpy(padfGeoTransform, psGenImgProjInfo->sDstParams.adfGeoTransform,
5020 : sizeof(double) * 6);
5021 : }
5022 : }
5023 :
5024 : /************************************************************************/
5025 : /* GDALTransformIsTranslationOnPixelBoundaries() */
5026 : /************************************************************************/
5027 :
5028 1622 : bool GDALTransformIsTranslationOnPixelBoundaries(GDALTransformerFunc,
5029 : void *pTransformerArg)
5030 : {
5031 1622 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5032 : {
5033 1292 : const auto *pApproxInfo =
5034 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5035 1292 : pTransformerArg = pApproxInfo->pBaseCBData;
5036 : }
5037 1622 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5038 : {
5039 1469 : const auto *pGenImgpProjInfo =
5040 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5041 480 : const auto IsCloseToInteger = [](double dfVal)
5042 480 : { return std::fabs(dfVal - std::round(dfVal)) <= 1e-6; };
5043 2858 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5044 1389 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5045 1387 : pGenImgpProjInfo->pReproject == nullptr &&
5046 565 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[1] ==
5047 565 : pGenImgpProjInfo->sDstParams.adfGeoTransform[1] &&
5048 292 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[5] ==
5049 292 : pGenImgpProjInfo->sDstParams.adfGeoTransform[5] &&
5050 258 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] ==
5051 258 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] &&
5052 258 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] ==
5053 516 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] &&
5054 : // Check that the georeferenced origin of the destination
5055 : // geotransform is close to be an integer value when transformed
5056 : // to source image coordinates
5057 258 : IsCloseToInteger(
5058 258 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[0] +
5059 258 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5060 258 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[1] +
5061 258 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5062 3116 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[2]) &&
5063 222 : IsCloseToInteger(
5064 222 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[3] +
5065 222 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5066 222 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[4] +
5067 222 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5068 1691 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[5]);
5069 : }
5070 153 : return false;
5071 : }
5072 :
5073 : /************************************************************************/
5074 : /* GDALTransformIsAffineNoRotation() */
5075 : /************************************************************************/
5076 :
5077 18 : bool GDALTransformIsAffineNoRotation(GDALTransformerFunc, void *pTransformerArg)
5078 : {
5079 18 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5080 : {
5081 18 : const auto *pApproxInfo =
5082 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5083 18 : pTransformerArg = pApproxInfo->pBaseCBData;
5084 : }
5085 18 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5086 : {
5087 18 : const auto *pGenImgpProjInfo =
5088 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5089 36 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5090 18 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5091 18 : pGenImgpProjInfo->pReproject == nullptr &&
5092 8 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] == 0 &&
5093 8 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] == 0 &&
5094 44 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] == 0 &&
5095 26 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] == 0;
5096 : }
5097 0 : return false;
5098 : }
5099 :
5100 : /************************************************************************/
5101 : /* GDALTransformHasFastClone() */
5102 : /************************************************************************/
5103 :
5104 : /** Returns whether GDALCloneTransformer() on this transformer is
5105 : * "fast"
5106 : * Counter-examples are GCPs or TPSs transformers.
5107 : */
5108 2 : bool GDALTransformHasFastClone(void *pTransformerArg)
5109 : {
5110 2 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5111 : {
5112 1 : const auto *pApproxInfo =
5113 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5114 1 : pTransformerArg = pApproxInfo->pBaseCBData;
5115 : // Fallback to next lines
5116 : }
5117 :
5118 2 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5119 : {
5120 2 : const auto *pGenImgpProjInfo =
5121 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5122 2 : return (pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr ||
5123 0 : GDALTransformHasFastClone(
5124 4 : pGenImgpProjInfo->sSrcParams.pTransformArg)) &&
5125 2 : (pGenImgpProjInfo->sDstParams.pTransformArg == nullptr ||
5126 0 : GDALTransformHasFastClone(
5127 2 : pGenImgpProjInfo->sDstParams.pTransformArg));
5128 : }
5129 0 : else if (GDALIsTransformer(pTransformerArg,
5130 : GDAL_RPC_TRANSFORMER_CLASS_NAME))
5131 : {
5132 0 : return true;
5133 : }
5134 : else
5135 : {
5136 0 : return false;
5137 : }
5138 : }
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