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 16024 : bool GDALIsTransformer(void *hTransformerArg, const char *pszClassName)
68 : {
69 16024 : if (!hTransformerArg)
70 780 : return false;
71 : // All transformers should have a GDALTransformerInfo member as their first members
72 15244 : GDALTransformerInfo *psInfo =
73 : static_cast<GDALTransformerInfo *>(hTransformerArg);
74 15244 : return memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
75 29594 : strlen(GDAL_GTI2_SIGNATURE)) == 0 &&
76 29594 : 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 :
189 642 : static bool GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
190 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
191 : int /* nPixels*/, int nLines, double dfPixelSizeX, double dfPixelSizeY)
192 : {
193 642 : double adfX[21] = {};
194 642 : double adfY[21] = {};
195 :
196 642 : const double dfMaxXOut = padfExtent[2];
197 642 : const double dfMaxYOut = padfExtent[3];
198 :
199 : // Take 20 steps.
200 642 : int nSamplePoints = 0;
201 14124 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
202 : {
203 : // Ensure we end exactly at the end.
204 13482 : if (dfRatio > 0.99)
205 642 : dfRatio = 1.0;
206 :
207 : // Along right.
208 13482 : adfX[nSamplePoints] = dfMaxXOut;
209 13482 : adfY[nSamplePoints] = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
210 13482 : nSamplePoints++;
211 : }
212 642 : double adfZ[21] = {};
213 :
214 642 : int abSuccess[21] = {};
215 :
216 642 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
217 : abSuccess);
218 :
219 642 : int abSuccess2[21] = {};
220 :
221 642 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
222 : abSuccess2);
223 :
224 642 : nSamplePoints = 0;
225 642 : int nBadCount = 0;
226 14124 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
227 : {
228 13482 : const double expected_x = dfMaxXOut;
229 13482 : const double expected_y = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
230 13482 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
231 10636 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
232 9262 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
233 : {
234 4220 : nBadCount++;
235 : }
236 13482 : nSamplePoints++;
237 : }
238 :
239 642 : return nBadCount == nSamplePoints;
240 : }
241 :
242 545 : static bool GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
243 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
244 : int nPixels, int /* nLines */, double dfPixelSizeX, double dfPixelSizeY)
245 : {
246 545 : double adfX[21] = {};
247 545 : double adfY[21] = {};
248 :
249 545 : const double dfMinXOut = padfExtent[0];
250 545 : const double dfMinYOut = padfExtent[1];
251 :
252 : // Take 20 steps.
253 545 : int nSamplePoints = 0;
254 11990 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
255 : {
256 : // Ensure we end exactly at the end.
257 11445 : if (dfRatio > 0.99)
258 545 : dfRatio = 1.0;
259 :
260 : // Along right.
261 11445 : adfX[nSamplePoints] = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
262 11445 : adfY[nSamplePoints] = dfMinYOut;
263 11445 : nSamplePoints++;
264 : }
265 545 : double adfZ[21] = {};
266 :
267 545 : int abSuccess[21] = {};
268 :
269 545 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
270 : abSuccess);
271 :
272 545 : int abSuccess2[21] = {};
273 :
274 545 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
275 : abSuccess2);
276 :
277 545 : nSamplePoints = 0;
278 545 : int nBadCount = 0;
279 11990 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
280 : {
281 11445 : const double expected_x = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
282 11445 : const double expected_y = dfMinYOut;
283 11445 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
284 9449 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
285 9160 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
286 : {
287 2285 : nBadCount++;
288 : }
289 11445 : nSamplePoints++;
290 : }
291 :
292 545 : 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 1234 : 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 1234 : VALIDATE_POINTER1(hSrcDS, "GDALSuggestedWarpOutput2", CE_Failure);
350 :
351 : const bool bIsGDALGenImgProjTransform{
352 2468 : pTransformArg &&
353 1234 : GDALIsTransformer(pTransformArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME)};
354 :
355 : /* -------------------------------------------------------------------- */
356 : /* Setup sample points all around the edge of the input raster. */
357 : /* -------------------------------------------------------------------- */
358 1234 : if (bIsGDALGenImgProjTransform)
359 : {
360 : // In case CHECK_WITH_INVERT_PROJ has been modified.
361 1234 : 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 1234 : const int nInXSize = GDALGetRasterXSize(hSrcDS);
371 1234 : const int nInYSize = GDALGetRasterYSize(hSrcDS);
372 :
373 : /* ------------------------------------------------------------- */
374 : /* Special case for warping on the same (or null) CRS. */
375 : /* ------------------------------------------------------------- */
376 1234 : if ((!nOptions || (nOptions & GDAL_SWO_FORCE_SQUARE_PIXEL) == 0) &&
377 1233 : pTransformArg && bIsGDALGenImgProjTransform)
378 : {
379 1233 : const GDALGenImgProjTransformInfo *psInfo =
380 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
381 :
382 1233 : if (!psInfo->sSrcParams.pTransformer &&
383 1157 : !psInfo->bHasCustomTransformationPipeline &&
384 1153 : !psInfo->sDstParams.pTransformer &&
385 1153 : psInfo->sSrcParams.adfGeoTransform[2] == 0 &&
386 1153 : psInfo->sSrcParams.adfGeoTransform[4] == 0 &&
387 1153 : psInfo->sDstParams.adfGeoTransform[0] == 0 &&
388 1141 : psInfo->sDstParams.adfGeoTransform[1] == 1 &&
389 1141 : psInfo->sDstParams.adfGeoTransform[2] == 0 &&
390 1141 : psInfo->sDstParams.adfGeoTransform[3] == 0 &&
391 1141 : psInfo->sDstParams.adfGeoTransform[4] == 0 &&
392 1141 : psInfo->sDstParams.adfGeoTransform[5] == 1)
393 : {
394 1141 : const OGRSpatialReference *poSourceCRS = nullptr;
395 1141 : const OGRSpatialReference *poTargetCRS = nullptr;
396 :
397 1141 : if (psInfo->pReprojectArg)
398 : {
399 747 : const GDALReprojectionTransformInfo *psRTI =
400 : static_cast<const GDALReprojectionTransformInfo *>(
401 : psInfo->pReprojectArg);
402 747 : poSourceCRS = psRTI->poForwardTransform->GetSourceCS();
403 747 : poTargetCRS = psRTI->poForwardTransform->GetTargetCS();
404 : }
405 :
406 1888 : if ((!poSourceCRS && !poTargetCRS) ||
407 747 : (poSourceCRS && poTargetCRS &&
408 747 : poSourceCRS->IsSame(poTargetCRS)))
409 : {
410 :
411 754 : const bool bNorthUp{psInfo->sSrcParams.adfGeoTransform[5] <
412 : 0.0};
413 :
414 754 : memcpy(padfGeoTransformOut, psInfo->sSrcParams.adfGeoTransform,
415 : sizeof(double) * 6);
416 :
417 754 : if (!bNorthUp)
418 : {
419 149 : padfGeoTransformOut[3] = padfGeoTransformOut[3] +
420 149 : nInYSize * padfGeoTransformOut[5];
421 149 : padfGeoTransformOut[5] = -padfGeoTransformOut[5];
422 : }
423 :
424 754 : *pnPixels = nInXSize;
425 754 : *pnLines = nInYSize;
426 :
427 : // Calculate extent from hSrcDS
428 754 : if (padfExtent)
429 : {
430 754 : padfExtent[0] = psInfo->sSrcParams.adfGeoTransform[0];
431 754 : padfExtent[1] =
432 754 : psInfo->sSrcParams.adfGeoTransform[3] +
433 754 : nInYSize * psInfo->sSrcParams.adfGeoTransform[5];
434 754 : padfExtent[2] =
435 754 : psInfo->sSrcParams.adfGeoTransform[0] +
436 754 : nInXSize * psInfo->sSrcParams.adfGeoTransform[1];
437 754 : padfExtent[3] = psInfo->sSrcParams.adfGeoTransform[3];
438 754 : if (!bNorthUp)
439 : {
440 149 : std::swap(padfExtent[1], padfExtent[3]);
441 : }
442 : }
443 754 : return CE_None;
444 : }
445 : }
446 : }
447 :
448 480 : const int N_PIXELSTEP = 50;
449 : int nSteps = static_cast<int>(
450 480 : static_cast<double>(std::min(nInYSize, nInXSize)) / N_PIXELSTEP + 0.5);
451 480 : if (nSteps < 20)
452 453 : 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?
461 480 : retry:
462 480 : int nStepsPlusOne = nSteps + 1;
463 480 : int nSampleMax = nStepsPlusOne * nStepsPlusOne;
464 :
465 480 : double dfStep = 1.0 / nSteps;
466 480 : double *padfY = nullptr;
467 480 : double *padfZ = nullptr;
468 480 : double *padfYRevert = nullptr;
469 480 : double *padfZRevert = nullptr;
470 :
471 : int *pabSuccess = static_cast<int *>(
472 480 : VSI_MALLOC3_VERBOSE(sizeof(int), nStepsPlusOne, nStepsPlusOne));
473 : double *padfX = static_cast<double *>(
474 480 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
475 : double *padfXRevert = static_cast<double *>(
476 480 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
477 480 : 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 :
490 480 : padfY = padfX + nSampleMax;
491 480 : padfZ = padfX + nSampleMax * 2;
492 480 : padfYRevert = padfXRevert + nSampleMax;
493 480 : padfZRevert = padfXRevert + nSampleMax * 2;
494 :
495 : // Take N_STEPS steps.
496 11623 : for (int iStep = 0; iStep <= nSteps; iStep++)
497 : {
498 11143 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
499 11143 : int iStep2 = iStep;
500 :
501 : // Along top.
502 11143 : padfX[iStep2] = dfRatio * nInXSize;
503 11143 : padfY[iStep2] = 0.0;
504 11143 : padfZ[iStep2] = 0.0;
505 :
506 : // Along bottom.
507 11143 : iStep2 += nStepsPlusOne;
508 11143 : padfX[iStep2] = dfRatio * nInXSize;
509 11143 : padfY[iStep2] = nInYSize;
510 11143 : padfZ[iStep2] = 0.0;
511 :
512 : // Along left.
513 11143 : iStep2 += nStepsPlusOne;
514 11143 : padfX[iStep2] = 0.0;
515 11143 : padfY[iStep2] = dfRatio * nInYSize;
516 11143 : padfZ[iStep2] = 0.0;
517 :
518 : // Along right.
519 11143 : iStep2 += nStepsPlusOne;
520 11143 : padfX[iStep2] = nInXSize;
521 11143 : padfY[iStep2] = dfRatio * nInYSize;
522 11143 : padfZ[iStep2] = 0.0;
523 : }
524 :
525 480 : int nSamplePoints = 4 * nStepsPlusOne;
526 :
527 480 : memset(pabSuccess, 1, sizeof(int) * nSampleMax);
528 :
529 : /* -------------------------------------------------------------------- */
530 : /* Transform them to the output coordinate system. */
531 : /* -------------------------------------------------------------------- */
532 : {
533 960 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
534 480 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY, padfZ,
535 : pabSuccess);
536 : }
537 480 : constexpr int SIGN_FINAL_UNINIT = -2;
538 480 : constexpr int SIGN_FINAL_INVALID = 0;
539 480 : int iSignDiscontinuity = SIGN_FINAL_UNINIT;
540 480 : int nFailedCount = 0;
541 480 : const int iSignArray[2] = {-1, 1};
542 45052 : for (int i = 0; i < nSamplePoints; i++)
543 : {
544 44572 : 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 39361 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
552 : {
553 10797 : if (!((iSignDiscontinuity * padfX[i] > 0 &&
554 10729 : 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 28564 : else if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
561 : {
562 1158 : for (const auto &iSign : iSignArray)
563 : {
564 842 : if ((iSign * padfX[i] > 0 && iSign * padfX[i] <= 180.0) ||
565 680 : (fabs(padfX[i] - iSign * -180.0) < 1e-8))
566 : {
567 162 : iSignDiscontinuity = iSign;
568 162 : break;
569 : }
570 : }
571 478 : if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
572 : {
573 316 : iSignDiscontinuity = SIGN_FINAL_INVALID;
574 : }
575 : }
576 : }
577 : else
578 : {
579 5211 : nFailedCount++;
580 : }
581 : }
582 :
583 480 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
584 : {
585 11188 : for (int i = 0; i < nSamplePoints; i++)
586 : {
587 11072 : if (pabSuccess[i])
588 : {
589 10455 : 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 : /* -------------------------------------------------------------------- */
613 480 : if (nFailedCount)
614 : {
615 134 : CPLDebug("WARP", "At least one point failed after direct transform");
616 : }
617 : else
618 : {
619 346 : memcpy(padfXRevert, padfX, nSamplePoints * sizeof(double));
620 346 : memcpy(padfYRevert, padfY, nSamplePoints * sizeof(double));
621 346 : memcpy(padfZRevert, padfZ, nSamplePoints * sizeof(double));
622 : {
623 692 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
624 346 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, padfXRevert,
625 : padfYRevert, padfZRevert, pabSuccess);
626 : }
627 :
628 31422 : for (int i = 0; nFailedCount == 0 && i < nSamplePoints; i++)
629 : {
630 31094 : if (!pabSuccess[i])
631 : {
632 18 : nFailedCount++;
633 18 : break;
634 : }
635 :
636 31076 : double dfRatio = (i % nStepsPlusOne) * dfStep;
637 31076 : if (dfRatio > 0.99)
638 1300 : dfRatio = 1.0;
639 :
640 31076 : double dfExpectedX = 0.0;
641 31076 : double dfExpectedY = 0.0;
642 31076 : if (i < nStepsPlusOne)
643 : {
644 7933 : dfExpectedX = dfRatio * nInXSize;
645 : }
646 23143 : else if (i < 2 * nStepsPlusOne)
647 : {
648 7845 : dfExpectedX = dfRatio * nInXSize;
649 7845 : dfExpectedY = nInYSize;
650 : }
651 15298 : else if (i < 3 * nStepsPlusOne)
652 : {
653 7711 : dfExpectedY = dfRatio * nInYSize;
654 : }
655 : else
656 : {
657 7587 : dfExpectedX = nInXSize;
658 7587 : dfExpectedY = dfRatio * nInYSize;
659 : }
660 :
661 31076 : if (fabs(padfXRevert[i] - dfExpectedX) >
662 31076 : nInXSize / static_cast<double>(nSteps) ||
663 31064 : fabs(padfYRevert[i] - dfExpectedY) >
664 31064 : nInYSize / static_cast<double>(nSteps))
665 12 : nFailedCount++;
666 : }
667 346 : if (nFailedCount != 0)
668 30 : 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 : /* -------------------------------------------------------------------- */
677 480 : if (nFailedCount)
678 : {
679 164 : nSamplePoints = 0;
680 :
681 : // Take N_STEPS steps.
682 3762 : for (int iStep = 0; iStep <= nSteps; iStep++)
683 : {
684 3598 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
685 :
686 92682 : for (int iStep2 = 0; iStep2 <= nSteps; iStep2++)
687 : {
688 89084 : const double dfRatio2 =
689 89084 : iStep2 == nSteps ? 1.0 : iStep2 * dfStep;
690 :
691 : // From top to bottom, from left to right.
692 89084 : padfX[nSamplePoints] = dfRatio2 * nInXSize;
693 89084 : padfY[nSamplePoints] = dfRatio * nInYSize;
694 89084 : padfZ[nSamplePoints] = 0.0;
695 89084 : nSamplePoints++;
696 : }
697 : }
698 :
699 164 : CPLAssert(nSamplePoints == nSampleMax);
700 :
701 : {
702 328 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
703 164 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY,
704 : padfZ, pabSuccess);
705 : }
706 : }
707 :
708 : /* -------------------------------------------------------------------- */
709 : /* Collect the bounds, ignoring any failed points. */
710 : /* -------------------------------------------------------------------- */
711 480 : double dfMinXOut = 0.0;
712 480 : double dfMinYOut = 0.0;
713 480 : double dfMaxXOut = 0.0;
714 480 : double dfMaxYOut = 0.0;
715 480 : bool bGotInitialPoint = false;
716 :
717 480 : nFailedCount = 0;
718 119744 : for (int i = 0; i < nSamplePoints; i++)
719 : {
720 119264 : int x_i = 0;
721 119264 : int y_i = 0;
722 :
723 119264 : if (nSamplePoints == nSampleMax)
724 : {
725 89084 : x_i = i % nStepsPlusOne;
726 89084 : y_i = i / nStepsPlusOne;
727 : }
728 : else
729 : {
730 30180 : if (i < 2 * nStepsPlusOne)
731 : {
732 15090 : x_i = i % nStepsPlusOne;
733 15090 : y_i = (i < nStepsPlusOne) ? 0 : nSteps;
734 : }
735 : }
736 :
737 119264 : if (x_i > 0 && (pabSuccess[i - 1] || pabSuccess[i]))
738 : {
739 86265 : double x_out_before = padfX[i - 1];
740 86265 : double x_out_after = padfX[i];
741 86265 : int nIter = 0;
742 86265 : double x_in_before =
743 86265 : static_cast<double>(x_i - 1) * nInXSize / nSteps;
744 86265 : double x_in_after = static_cast<double>(x_i) * nInXSize / nSteps;
745 86265 : int invalid_before = !(pabSuccess[i - 1]);
746 86265 : 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 104870 : while ((invalid_before || invalid_after ||
753 217407 : 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 119264 : if (!pabSuccess[i])
813 : {
814 14768 : nFailedCount++;
815 14768 : continue;
816 : }
817 :
818 104496 : if (bGotInitialPoint)
819 : {
820 104038 : dfMinXOut = std::min(dfMinXOut, padfX[i]);
821 104038 : dfMinYOut = std::min(dfMinYOut, padfY[i]);
822 104038 : dfMaxXOut = std::max(dfMaxXOut, padfX[i]);
823 104038 : dfMaxYOut = std::max(dfMaxYOut, padfY[i]);
824 : }
825 : else
826 : {
827 458 : bGotInitialPoint = true;
828 458 : dfMinXOut = padfX[i];
829 458 : dfMaxXOut = padfX[i];
830 458 : dfMinYOut = padfY[i];
831 458 : dfMaxYOut = padfY[i];
832 : }
833 : }
834 :
835 480 : 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 :
849 475 : if (nFailedCount)
850 130 : CPLDebug("GDAL",
851 : "GDALSuggestedWarpOutput(): %d out of %d points failed to "
852 : "transform.",
853 : nFailedCount, nSamplePoints);
854 :
855 475 : bool bIsGeographicCoordsDeg = false;
856 475 : if (bIsGDALGenImgProjTransform)
857 : {
858 475 : const GDALGenImgProjTransformInfo *pGIPTI =
859 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
860 475 : if (pGIPTI->sSrcParams.pTransformer == GDALGeoLocTransform &&
861 30 : pGIPTI->sDstParams.pTransformer == nullptr &&
862 30 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
863 28 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
864 28 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
865 28 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
866 28 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
867 28 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
868 : {
869 : /* --------------------------------------------------------------------
870 : */
871 : /* Special case for geolocation array, to quickly find the
872 : * bounds. */
873 : /* --------------------------------------------------------------------
874 : */
875 28 : const GDALGeoLocTransformInfo *pGLTI =
876 : static_cast<const GDALGeoLocTransformInfo *>(
877 : pGIPTI->sSrcParams.pTransformArg);
878 :
879 28 : 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 :
900 224 : for (const auto &xy :
901 28 : {std::pair<double, double>(pGLTI->dfMinX, pGLTI->dfYAtMinX),
902 28 : std::pair<double, double>(pGLTI->dfXAtMinY, pGLTI->dfMinY),
903 28 : std::pair<double, double>(pGLTI->dfMaxX, pGLTI->dfYAtMaxX),
904 140 : std::pair<double, double>(pGLTI->dfXAtMaxY, pGLTI->dfMaxY)})
905 : {
906 112 : double x = xy.first;
907 112 : double y = xy.second;
908 112 : if (pGLTI->bSwapXY)
909 : {
910 4 : std::swap(x, y);
911 : }
912 112 : double xOut = std::numeric_limits<double>::quiet_NaN();
913 112 : double yOut = std::numeric_limits<double>::quiet_NaN();
914 120 : if (pGIPTI->pReproject == nullptr ||
915 8 : pGIPTI->pReproject(pGIPTI->pReprojectArg, false, 1, &x, &y,
916 : nullptr, nullptr))
917 : {
918 112 : xOut = x;
919 112 : yOut = y;
920 : }
921 112 : dfMinXOut = std::min(dfMinXOut, xOut);
922 112 : dfMinYOut = std::min(dfMinYOut, yOut);
923 112 : dfMaxXOut = std::max(dfMaxXOut, xOut);
924 112 : dfMaxYOut = std::max(dfMaxYOut, yOut);
925 28 : }
926 : }
927 447 : else if (pGIPTI->sSrcParams.pTransformer == nullptr &&
928 403 : pGIPTI->sDstParams.pTransformer == nullptr &&
929 403 : pGIPTI->pReproject == GDALReprojectionTransform &&
930 392 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
931 390 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
932 390 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
933 390 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
934 390 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
935 390 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
936 : {
937 : /* ------------------------------------------------------------- */
938 : /* Special case for warping using source geotransform and */
939 : /* reprojection to deal with the poles. */
940 : /* ------------------------------------------------------------- */
941 390 : const GDALReprojectionTransformInfo *psRTI =
942 : static_cast<const GDALReprojectionTransformInfo *>(
943 : pGIPTI->pReprojectArg);
944 : const OGRSpatialReference *poSourceCRS =
945 390 : psRTI->poForwardTransform->GetSourceCS();
946 : const OGRSpatialReference *poTargetCRS =
947 390 : psRTI->poForwardTransform->GetTargetCS();
948 779 : if (poTargetCRS != nullptr &&
949 389 : psRTI->poReverseTransform != nullptr &&
950 389 : poTargetCRS->IsGeographic() &&
951 118 : fabs(poTargetCRS->GetAngularUnits() -
952 897 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9 &&
953 118 : (!poSourceCRS || !poSourceCRS->IsGeographic()))
954 : {
955 91 : bIsGeographicCoordsDeg = true;
956 :
957 91 : std::unique_ptr<CPLConfigOptionSetter> poSetter;
958 91 : 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 :
970 273 : for (const auto &sign : iSignArray)
971 : {
972 182 : double X = 0.0;
973 182 : const double Yinit = 90.0 * sign;
974 182 : double Y = Yinit;
975 182 : if (psRTI->poReverseTransform->Transform(1, &X, &Y))
976 : {
977 124 : const auto invGT =
978 : pGIPTI->sSrcParams.adfInvGeoTransform;
979 124 : const double x = invGT[0] + X * invGT[1] + Y * invGT[2];
980 124 : const double y = invGT[3] + X * invGT[4] + Y * invGT[5];
981 124 : constexpr double EPSILON = 1e-5;
982 124 : if (x >= -EPSILON && x <= nInXSize + EPSILON &&
983 27 : y >= -EPSILON && y <= nInYSize + EPSILON)
984 : {
985 6 : if (psRTI->poForwardTransform->Transform(1, &X,
986 12 : &Y) &&
987 6 : fabs(Y - Yinit) <= 1e-6)
988 : {
989 6 : bool bMinXMaxXSet = false;
990 6 : if (poSourceCRS)
991 : {
992 : const char *pszProjection =
993 6 : poSourceCRS->GetAttrValue("PROJECTION");
994 6 : if (pszProjection &&
995 6 : EQUAL(pszProjection,
996 : SRS_PT_ORTHOGRAPHIC))
997 : {
998 : const double dfLon0 =
999 4 : poSourceCRS->GetNormProjParm(
1000 : SRS_PP_CENTRAL_MERIDIAN, 0.0);
1001 4 : dfMinXOut = dfLon0 - 90;
1002 4 : dfMaxXOut = dfLon0 + 90;
1003 4 : bMinXMaxXSet = true;
1004 : }
1005 : }
1006 6 : if (!bMinXMaxXSet)
1007 : {
1008 2 : dfMinXOut = -180;
1009 2 : dfMaxXOut = 180;
1010 : }
1011 6 : if (sign < 0)
1012 2 : dfMinYOut = Yinit;
1013 : else
1014 4 : dfMaxYOut = Yinit;
1015 : }
1016 : }
1017 : }
1018 : }
1019 :
1020 91 : 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 390 : if (poSourceCRS != nullptr && poTargetCRS != nullptr &&
1035 389 : pGIPTI->sSrcParams.adfGeoTransform[1] != 0 &&
1036 389 : pGIPTI->sSrcParams.adfGeoTransform[2] == 0 &&
1037 389 : pGIPTI->sSrcParams.adfGeoTransform[4] == 0 &&
1038 389 : pGIPTI->sSrcParams.adfGeoTransform[5] != 0)
1039 : {
1040 389 : const double dfULX = pGIPTI->sSrcParams.adfGeoTransform[0];
1041 389 : const double dfULY = pGIPTI->sSrcParams.adfGeoTransform[3];
1042 389 : const double dfLRX =
1043 389 : dfULX + pGIPTI->sSrcParams.adfGeoTransform[1] * nInXSize;
1044 389 : const double dfLRY =
1045 389 : dfULY + pGIPTI->sSrcParams.adfGeoTransform[5] * nInYSize;
1046 389 : const double dfMinSrcX = std::min(dfULX, dfLRX);
1047 389 : const double dfMinSrcY = std::min(dfULY, dfLRY);
1048 389 : const double dfMaxSrcX = std::max(dfULX, dfLRX);
1049 389 : const double dfMaxSrcY = std::max(dfULY, dfLRY);
1050 389 : double dfTmpMinXOut = std::numeric_limits<double>::max();
1051 389 : double dfTmpMinYOut = std::numeric_limits<double>::max();
1052 389 : double dfTmpMaxXOut = std::numeric_limits<double>::min();
1053 389 : double dfTmpMaxYOut = std::numeric_limits<double>::min();
1054 778 : if (psRTI->poForwardTransform->TransformBounds(
1055 : dfMinSrcX, dfMinSrcY, dfMaxSrcX, dfMaxSrcY,
1056 : &dfTmpMinXOut, &dfTmpMinYOut, &dfTmpMaxXOut,
1057 : &dfTmpMaxYOut,
1058 389 : 2)) // minimum number of points as we already have a
1059 : // logic above to sample
1060 : {
1061 382 : dfMinXOut = std::min(dfMinXOut, dfTmpMinXOut);
1062 382 : dfMinYOut = std::min(dfMinYOut, dfTmpMinYOut);
1063 382 : dfMaxXOut = std::max(dfMaxXOut, dfTmpMaxXOut);
1064 382 : 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 475 : double dfDiagonalDist = 0.0;
1078 475 : double dfDeltaX = 0.0;
1079 475 : double dfDeltaY = 0.0;
1080 :
1081 475 : if (pabSuccess[0] && pabSuccess[nSamplePoints - 1])
1082 : {
1083 350 : dfDeltaX = padfX[nSamplePoints - 1] - padfX[0];
1084 350 : 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 475 : if (dfDeltaX == 0.0 || dfDeltaY == 0.0)
1089 : {
1090 131 : dfDeltaX = dfMaxXOut - dfMinXOut;
1091 131 : dfDeltaY = dfMaxYOut - dfMinYOut;
1092 : }
1093 :
1094 475 : dfDiagonalDist = sqrt(dfDeltaX * dfDeltaX + dfDeltaY * dfDeltaY);
1095 :
1096 : /* -------------------------------------------------------------------- */
1097 : /* Compute a pixel size from this. */
1098 : /* -------------------------------------------------------------------- */
1099 : double dfPixelSize =
1100 475 : dfDiagonalDist / sqrt(static_cast<double>(nInXSize) * nInXSize +
1101 475 : static_cast<double>(nInYSize) * nInYSize);
1102 :
1103 475 : double dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1104 475 : double dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1105 :
1106 475 : const int knIntMaxMinusOne = std::numeric_limits<int>::max() - 1;
1107 475 : if (dfPixels > knIntMaxMinusOne && dfLines <= dfPixels)
1108 : {
1109 0 : dfPixels = knIntMaxMinusOne;
1110 0 : dfPixelSize = (dfMaxXOut - dfMinXOut) / dfPixels;
1111 0 : dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1112 : }
1113 475 : else if (dfLines > knIntMaxMinusOne)
1114 : {
1115 2 : dfLines = knIntMaxMinusOne;
1116 2 : dfPixelSize = (dfMaxYOut - dfMinYOut) / dfLines;
1117 2 : dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1118 : }
1119 :
1120 475 : 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 475 : 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 467 : *pnPixels = static_cast<int>(dfPixels + 0.5);
1142 467 : *pnLines = static_cast<int>(dfLines + 0.5);
1143 : }
1144 :
1145 475 : double dfPixelSizeX = dfPixelSize;
1146 475 : double dfPixelSizeY = dfPixelSize;
1147 :
1148 475 : 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 650 : for (const auto &dfRatio : adfRatioArray)
1156 : {
1157 642 : const double dfTryPixelSizeX =
1158 642 : dfPixelSizeX - dfPixelSizeX * dfRatio / *pnPixels;
1159 642 : double adfExtent[4] = {dfMinXOut, dfMaxYOut - (*pnLines) * dfPixelSizeY,
1160 642 : dfMinXOut + (*pnPixels) * dfTryPixelSizeX,
1161 642 : dfMaxYOut};
1162 642 : if (!GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
1163 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1164 : dfTryPixelSizeX, dfPixelSizeY))
1165 : {
1166 467 : dfPixelSizeX = dfTryPixelSizeX;
1167 467 : 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 555 : for (const auto &dfRatio : adfRatioArray)
1177 : {
1178 545 : const double dfTryPixelSizeY =
1179 545 : dfPixelSizeY - dfPixelSizeY * dfRatio / *pnLines;
1180 : double adfExtent[4] = {
1181 545 : dfMinXOut, dfMaxYOut - (*pnLines) * dfTryPixelSizeY,
1182 545 : dfMinXOut + (*pnPixels) * dfPixelSizeX, dfMaxYOut};
1183 545 : if (!GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
1184 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1185 : dfPixelSizeX, dfTryPixelSizeY))
1186 : {
1187 465 : dfPixelSizeY = dfTryPixelSizeY;
1188 465 : break;
1189 : }
1190 : }
1191 :
1192 : /* -------------------------------------------------------------------- */
1193 : /* Recompute some bounds so that all return values are consistent */
1194 : /* -------------------------------------------------------------------- */
1195 475 : double dfMaxXOutNew = dfMinXOut + (*pnPixels) * dfPixelSizeX;
1196 475 : if (bIsGeographicCoordsDeg &&
1197 115 : ((dfMaxXOut <= 180 && dfMaxXOutNew > 180) || dfMaxXOut == 180))
1198 : {
1199 3 : dfMaxXOut = 180;
1200 3 : dfPixelSizeX = (dfMaxXOut - dfMinXOut) / *pnPixels;
1201 : }
1202 : else
1203 : {
1204 472 : dfMaxXOut = dfMaxXOutNew;
1205 : }
1206 :
1207 475 : double dfMinYOutNew = dfMaxYOut - (*pnLines) * dfPixelSizeY;
1208 475 : if (bIsGeographicCoordsDeg && dfMinYOut >= -90 && dfMinYOutNew < -90)
1209 : {
1210 0 : dfMinYOut = -90;
1211 0 : dfPixelSizeY = (dfMaxYOut - dfMinYOut) / *pnLines;
1212 : }
1213 : else
1214 : {
1215 475 : dfMinYOut = dfMinYOutNew;
1216 : }
1217 :
1218 : /* -------------------------------------------------------------------- */
1219 : /* Return raw extents. */
1220 : /* -------------------------------------------------------------------- */
1221 475 : padfExtent[0] = dfMinXOut;
1222 475 : padfExtent[1] = dfMinYOut;
1223 475 : padfExtent[2] = dfMaxXOut;
1224 475 : padfExtent[3] = dfMaxYOut;
1225 :
1226 : /* -------------------------------------------------------------------- */
1227 : /* Set the output geotransform. */
1228 : /* -------------------------------------------------------------------- */
1229 475 : padfGeoTransformOut[0] = dfMinXOut;
1230 475 : padfGeoTransformOut[1] = dfPixelSizeX;
1231 475 : padfGeoTransformOut[2] = 0.0;
1232 475 : padfGeoTransformOut[3] = dfMaxYOut;
1233 475 : padfGeoTransformOut[4] = 0.0;
1234 475 : padfGeoTransformOut[5] = -dfPixelSizeY;
1235 :
1236 475 : CPLFree(padfX);
1237 475 : CPLFree(padfXRevert);
1238 475 : CPLFree(pabSuccess);
1239 :
1240 475 : return CE_None;
1241 : }
1242 :
1243 : /************************************************************************/
1244 : /* GetCurrentCheckWithInvertPROJ() */
1245 : /************************************************************************/
1246 :
1247 3588 : static bool GetCurrentCheckWithInvertPROJ()
1248 : {
1249 3588 : 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 2324 : static GDALGenImgProjTransformInfo *GDALCreateGenImgProjTransformerInternal()
1261 : {
1262 : /* -------------------------------------------------------------------- */
1263 : /* Initialize the transform info. */
1264 : /* -------------------------------------------------------------------- */
1265 : GDALGenImgProjTransformInfo *psInfo =
1266 : static_cast<GDALGenImgProjTransformInfo *>(
1267 2324 : CPLCalloc(sizeof(GDALGenImgProjTransformInfo), 1));
1268 :
1269 2324 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
1270 : strlen(GDAL_GTI2_SIGNATURE));
1271 2324 : psInfo->sTI.pszClassName = GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME;
1272 2324 : psInfo->sTI.pfnTransform = GDALGenImgProjTransform;
1273 2324 : psInfo->sTI.pfnCleanup = GDALDestroyGenImgProjTransformer;
1274 2324 : psInfo->sTI.pfnSerialize = GDALSerializeGenImgProjTransformer;
1275 2324 : psInfo->sTI.pfnCreateSimilar = GDALCreateSimilarGenImgProjTransformer;
1276 :
1277 2324 : psInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1278 2324 : psInfo->bHasCustomTransformationPipeline = false;
1279 :
1280 2324 : 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 977 : static void InsertCenterLong(GDALDatasetH hDS, const OGRSpatialReference *poSRS,
1425 : const OGRSpatialReference *poDstSRS,
1426 : const char *pszTargetExtent,
1427 : CPLStringList &aosOptions)
1428 :
1429 : {
1430 1712 : if (!poSRS->IsGeographic() || std::fabs(poSRS->GetAngularUnits() -
1431 735 : CPLAtof(SRS_UA_DEGREE_CONV)) > 1e-9)
1432 : {
1433 245 : return;
1434 : }
1435 :
1436 734 : 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 734 : double adfGeoTransform[6] = {};
1444 :
1445 734 : if (GDALGetGeoTransform(hDS, adfGeoTransform) != CE_None)
1446 0 : return;
1447 :
1448 : /* -------------------------------------------------------------------- */
1449 : /* Compute min/max longitude based on testing the four corners. */
1450 : /* -------------------------------------------------------------------- */
1451 734 : const int nXSize = GDALGetRasterXSize(hDS);
1452 734 : const int nYSize = GDALGetRasterYSize(hDS);
1453 :
1454 : const double dfMinLong =
1455 1468 : std::min(std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1456 734 : 0 * adfGeoTransform[2],
1457 1468 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1458 734 : 0 * adfGeoTransform[2]),
1459 1468 : std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1460 734 : nYSize * adfGeoTransform[2],
1461 1468 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1462 734 : nYSize * adfGeoTransform[2]));
1463 : const double dfMaxLong =
1464 1468 : std::max(std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1465 734 : 0 * adfGeoTransform[2],
1466 1468 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1467 734 : 0 * adfGeoTransform[2]),
1468 1468 : std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1469 734 : nYSize * adfGeoTransform[2],
1470 1468 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1471 734 : 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 734 : 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 732 : const double dfCenterLong = (dfMaxLong + dfMinLong) / 2.0;
1498 732 : aosOptions.SetNameValue("CENTER_LONG", CPLSPrintf("%g", dfCenterLong));
1499 : }
1500 :
1501 : /************************************************************************/
1502 : /* GDALComputeAreaOfInterest() */
1503 : /************************************************************************/
1504 :
1505 1340 : 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 1340 : bool ret = false;
1513 :
1514 1340 : if (!poSRS)
1515 0 : return false;
1516 :
1517 1340 : OGRSpatialReference oSrcSRSHoriz(*poSRS);
1518 1340 : if (oSrcSRSHoriz.IsCompound())
1519 : {
1520 18 : oSrcSRSHoriz.StripVertical();
1521 : }
1522 :
1523 1340 : OGRSpatialReference *poGeog = oSrcSRSHoriz.CloneGeogCS();
1524 1340 : if (poGeog)
1525 : {
1526 1340 : poGeog->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
1527 1340 : poGeog->SetAngularUnits(SRS_UA_DEGREE, CPLAtof(SRS_UA_DEGREE_CONV));
1528 :
1529 1340 : auto poCT = OGRCreateCoordinateTransformation(&oSrcSRSHoriz, poGeog);
1530 1340 : if (poCT)
1531 : {
1532 1340 : poCT->SetEmitErrors(false);
1533 :
1534 : double x[4], y[4];
1535 1340 : x[0] = adfGT[0];
1536 1340 : y[0] = adfGT[3];
1537 1340 : x[1] = adfGT[0] + nXSize * adfGT[1];
1538 1340 : y[1] = adfGT[3];
1539 1340 : x[2] = adfGT[0];
1540 1340 : y[2] = adfGT[3] + nYSize * adfGT[5];
1541 1340 : x[3] = x[1];
1542 1340 : y[3] = y[2];
1543 1340 : int validity[4] = {false, false, false, false};
1544 1340 : poCT->Transform(4, x, y, nullptr, validity);
1545 1340 : dfWestLongitudeDeg = std::numeric_limits<double>::max();
1546 1340 : dfSouthLatitudeDeg = std::numeric_limits<double>::max();
1547 1340 : dfEastLongitudeDeg = -std::numeric_limits<double>::max();
1548 1340 : dfNorthLatitudeDeg = -std::numeric_limits<double>::max();
1549 6700 : for (int i = 0; i < 4; i++)
1550 : {
1551 5360 : if (validity[i])
1552 : {
1553 5344 : ret = true;
1554 5344 : dfWestLongitudeDeg = std::min(dfWestLongitudeDeg, x[i]);
1555 5344 : dfSouthLatitudeDeg = std::min(dfSouthLatitudeDeg, y[i]);
1556 5344 : dfEastLongitudeDeg = std::max(dfEastLongitudeDeg, x[i]);
1557 5344 : dfNorthLatitudeDeg = std::max(dfNorthLatitudeDeg, y[i]);
1558 : }
1559 : }
1560 1340 : if (validity[0] && validity[1] && x[0] > x[1])
1561 : {
1562 3 : dfWestLongitudeDeg = x[0];
1563 3 : dfEastLongitudeDeg = x[1];
1564 : }
1565 1340 : if (ret && std::fabs(dfWestLongitudeDeg) <= 180 &&
1566 1333 : std::fabs(dfEastLongitudeDeg) <= 180 &&
1567 1329 : std::fabs(dfSouthLatitudeDeg) <= 90 &&
1568 1325 : std::fabs(dfNorthLatitudeDeg) <= 90)
1569 : {
1570 1325 : 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 1340 : OGRCoordinateTransformation::DestroyCT(poCT);
1583 : }
1584 :
1585 1340 : delete poGeog;
1586 : }
1587 :
1588 1340 : 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 42 : static void GDALGCPAntimeridianUnwrap(int nGCPCount, GDAL_GCP *pasGCPList,
1679 : const OGRSpatialReference &oSRS,
1680 : CSLConstList papszOptions)
1681 : {
1682 : const char *pszGCPAntimeridianUnwrap =
1683 42 : CSLFetchNameValueDef(papszOptions, "GCP_ANTIMERIDIAN_UNWRAP", "AUTO");
1684 125 : const bool bForced = EQUAL(pszGCPAntimeridianUnwrap, "YES") ||
1685 41 : EQUAL(pszGCPAntimeridianUnwrap, "ON") ||
1686 124 : EQUAL(pszGCPAntimeridianUnwrap, "TRUE") ||
1687 41 : EQUAL(pszGCPAntimeridianUnwrap, "1");
1688 48 : 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 2054 : 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 2054 : "</OptionList>";
1997 : }
1998 :
1999 : /************************************************************************/
2000 : /* GDALCreateGenImgProjTransformer2() */
2001 : /************************************************************************/
2002 :
2003 : /* clang-format off */
2004 : /**
2005 : * Create image to image transformer.
2006 : *
2007 : * This function creates a transformation object that maps from pixel/line
2008 : * coordinates on one image to pixel/line coordinates on another image. The
2009 : * images may potentially be georeferenced in different coordinate systems,
2010 : * and may used GCPs to map between their pixel/line coordinates and
2011 : * georeferenced coordinates (as opposed to the default assumption that their
2012 : * geotransform should be used).
2013 : *
2014 : * This transformer potentially performs three concatenated transformations.
2015 : *
2016 : * The first stage is from source image pixel/line coordinates to source
2017 : * image georeferenced coordinates, and may be done using the geotransform,
2018 : * or if not defined using a polynomial model derived from GCPs. If GCPs
2019 : * are used this stage is accomplished using GDALGCPTransform().
2020 : *
2021 : * The second stage is to change projections from the source coordinate system
2022 : * to the destination coordinate system, assuming they differ. This is
2023 : * accomplished internally using GDALReprojectionTransform().
2024 : *
2025 : * The third stage is converting from destination image georeferenced
2026 : * coordinates to destination image coordinates. This is done using the
2027 : * destination image geotransform, or if not available, using a polynomial
2028 : * model derived from GCPs. If GCPs are used this stage is accomplished using
2029 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
2030 : * transformation is created.
2031 : *
2032 : * Supported Options (specified with the -to switch of gdalwarp for example):
2033 : * <ul>
2034 : * <li> SRC_SRS: WKT SRS, or any string recognized by
2035 : * OGRSpatialReference::SetFromUserInput(), to be used as an override for
2036 : * hSrcDS.</li>
2037 : * <li> DST_SRS: WKT SRS, or any string recognized by
2038 : * OGRSpatialReference::SetFromUserInput(), to be used as an override for
2039 : * hDstDS.
2040 : * </li>
2041 : * <li>PROMOTE_TO_3D=YES/NO: whether to promote SRC_SRS / DST_SRS to 3D.
2042 : * Default is NO</li>
2043 : * <li> COORDINATE_OPERATION: (GDAL >= 3.0) Coordinate operation, as
2044 : * a PROJ or WKT string, used as an override over the normally computed
2045 : * pipeline. The pipeline must take into account the axis order of the source
2046 : * and target SRS.
2047 : * </li>
2048 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
2049 : * operations are allowed. Defaults to YES.</li>
2050 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
2051 : * PROJ 9.x series), PROJ may use coordinate
2052 : * operations that are not the "best" if resources (typically grids) needed
2053 : * to use them are missing. It will then fallback to other coordinate operations
2054 : * that have a lesser accuracy, for example using Helmert transformations,
2055 : * or in the absence of such operations, to ones with potential very rough
2056 : * accuracy, using "ballpark" transformations
2057 : * (see https://proj.org/glossary.html).
2058 : * When calling this method with YES, PROJ will only consider the
2059 : * "best" operation, and error out (at Transform() time) if they cannot be
2060 : * used.
2061 : * This method may be used together with ALLOW_BALLPARK=NO to
2062 : * only allow best operations that have a known accuracy.
2063 : * Note that this method has no effect on PROJ versions before 9.2.
2064 : * The default value for this option can be also set with the
2065 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
2066 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
2067 : * <li> COORDINATE_EPOCH: (GDAL >= 3.0) Coordinate epoch,
2068 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2069 : * </li>
2070 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
2071 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2072 : * </li>
2073 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of target CRS,
2074 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2075 : * </li>
2076 : * <li> GCPS_OK: If false, GCPs will not be used, default is TRUE.
2077 : * </li>
2078 : * <li> REFINE_MINIMUM_GCPS: The minimum amount of GCPs that should be available
2079 : * after the refinement.
2080 : * </li>
2081 : * <li> REFINE_TOLERANCE: The tolerance that specifies when a GCP will be
2082 : * eliminated.
2083 : * </li>
2084 : * <li> MAX_GCP_ORDER: the maximum order to use for GCP derived polynomials if
2085 : * possible. The default is to autoselect based on the number of GCPs.
2086 : * A value of -1 triggers use of Thin Plate Spline instead of polynomials if
2087 : * SRC_METHOD/DST_METHOD is not specified.
2088 : * </li>
2089 : * <li>GCP_ANTIMERIDIAN_UNWRAP=AUTO/YES/NO. (GDAL >= 3.8) Whether to
2090 : * "unwrap" longitudes of ground control points that span the antimeridian.
2091 : * For datasets with GCPs in longitude/latitude coordinate space spanning the
2092 : * antimeridian, longitudes will have a discontinuity on +/- 180 deg, and
2093 : * will result in a subset of the GCPs with longitude in the [-180,-170] range
2094 : * and another subset in [170, 180]. By default (AUTO), that situation will be
2095 : * detected and longitudes in [-180,-170] will be shifted to [180, 190] to get
2096 : * a continuous set. This option can be set to YES to force that behavior
2097 : * (useful if no SRS information is available), or to NO to disable it.
2098 : * </li>
2099 : * <li> SRC_METHOD: may have a value which is one of GEOTRANSFORM, GCP_HOMOGRAPHY,
2100 : * GCP_POLYNOMIAL, GCP_TPS, GEOLOC_ARRAY, RPC to force only one geolocation
2101 : * method to be considered on the source dataset. Will be used for pixel/line
2102 : * to georef transformation on the source dataset. NO_GEOTRANSFORM can be
2103 : * used to specify the identity geotransform (ungeoreferenced image)
2104 : * Note that using GCP_TPS with more than a few thousand GCPs requires significant RAM usage
2105 : * (at least numGCPs * numGCPs * 8 bytes) and processing time.
2106 : * </li>
2107 : * <li> DST_METHOD: may have a value which is one of GEOTRANSFORM,
2108 : * GCP_POLYNOMIAL, GCP_HOMOGRAPHY, GCP_TPS, GEOLOC_ARRAY (added in 3.5), RPC to
2109 : * force only one
2110 : * geolocation method to be considered on the target dataset. Will be used for
2111 : * pixel/line to georef transformation on the destination dataset.
2112 : * NO_GEOTRANSFORM can be used to specify the identity geotransform
2113 : * (ungeoreferenced image)
2114 : * Note that using GCP_TPS with more than a few thousand GCPs requires significant RAM usage
2115 : * (at least numGCPs * numGCPs * 8 bytes) and processing time.
2116 : * </li>
2117 : * <li> RPC_HEIGHT: A fixed height to be used with RPC
2118 : * calculations. If RPC_HEIGHT and RPC_DEM are not specified but that the RPC
2119 : * metadata domain contains a HEIGHT_DEFAULT item (for example, the DIMAP driver
2120 : * may fill it), this value will be used as the RPC_HEIGHT. Otherwise, if none
2121 : * of RPC_HEIGHT and RPC_DEM are specified as transformer
2122 : * options and if HEIGHT_DEFAULT is no available, a height of 0 will be used.
2123 : * </li>
2124 : * <li> RPC_DEM: The name of a DEM file to be used with RPC
2125 : * calculations. See GDALCreateRPCTransformerV2() for more details.
2126 : * </li>
2127 : * <li> Other RPC related options. See GDALCreateRPCTransformerV2()
2128 : * </li>
2129 : * <li>
2130 : * INSERT_CENTER_LONG: May be set to FALSE to disable setting up a CENTER_LONG
2131 : * value on the coordinate system to rewrap things around the center of the
2132 : * image.
2133 : * </li>
2134 : * <li> SRC_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL
2135 : * >= 2.2) Use an approximate transformer for the source transformer. Must be
2136 : * defined together with SRC_APPROX_ERROR_IN_PIXEL to be taken into account.
2137 : * </li>
2138 : * <li> SRC_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use
2139 : * an approximate transformer for the source transformer.. Must be defined
2140 : * together with SRC_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2141 : * </li>
2142 : * <li>
2143 : * DST_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL >= 2.2) Use
2144 : * an approximate transformer for the destination transformer. Must be defined
2145 : * together with DST_APPROX_ERROR_IN_PIXEL to be taken into account.
2146 : * </li>
2147 : * <li>
2148 : * DST_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use an
2149 : * approximate transformer for the destination transformer. Must be defined
2150 : * together with DST_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2151 : * </li>
2152 : * <li>
2153 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT=err_threshold_in_src_SRS_units.
2154 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2155 : * reprojection. Must be used together with
2156 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT to be taken into account.
2157 : * </li>
2158 : * <li>
2159 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT=err_threshold_in_dst_SRS_units.
2160 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2161 : * reprojection. Must be used together with
2162 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT to be taken into account.
2163 : * </li>
2164 : * <li>
2165 : * AREA_OF_INTEREST=west_lon_deg,south_lat_deg,east_lon_deg,north_lat_deg. (GDAL
2166 : * >= 3.0) Area of interest, used to compute the best coordinate operation
2167 : * between the source and target SRS. If not specified, the bounding box of the
2168 : * source raster will be used.
2169 : * </li>
2170 : * <li> GEOLOC_BACKMAP_OVERSAMPLE_FACTOR=[0.1,2]. (GDAL >= 3.5) Oversample
2171 : * factor used to derive the size of the "backmap" used for geolocation array
2172 : * transformers. Default value is 1.3.
2173 : * </li>
2174 : * <li> GEOLOC_USE_TEMP_DATASETS=YES/NO.
2175 : * (GDAL >= 3.5) Whether temporary GeoTIFF datasets should be used to store
2176 : * the backmap. The default is NO, that is to use in-memory arrays, unless the
2177 : * number of pixels of the geolocation array is greater than 16 megapixels.
2178 : * </li>
2179 : * <li>
2180 : * GEOLOC_ARRAY/SRC_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a GDAL
2181 : * dataset containing a geolocation array and associated metadata. This is an
2182 : * alternative to having geolocation information described in the GEOLOCATION
2183 : * metadata domain of the source dataset. The dataset specified may have a
2184 : * GEOLOCATION metadata domain containing appropriate metadata, however default
2185 : * values are assigned for all omitted items. X_BAND defaults to 1 and Y_BAND to
2186 : * 2, however the dataset must contain exactly 2 bands. PIXEL_OFFSET and
2187 : * LINE_OFFSET default to 0. PIXEL_STEP and LINE_STEP default to the ratio of
2188 : * the width/height of the source dataset divided by the with/height of the
2189 : * geolocation array. SRS defaults to the geolocation array dataset's spatial
2190 : * reference system if set, otherwise WGS84 is used.
2191 : * GEOREFERENCING_CONVENTION is selected from the main metadata domain if it
2192 : * is omitted from the GEOLOCATION domain, and if not available
2193 : * TOP_LEFT_CORNER is assigned as a default.
2194 : * If GEOLOC_ARRAY is set SRC_METHOD
2195 : * defaults to GEOLOC_ARRAY.
2196 : * </li>
2197 : * <li>DST_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a
2198 : * GDAL dataset that contains at least 2 bands with the X and Y geolocation
2199 : * bands. This is an alternative to having geolocation information described in
2200 : * the GEOLOCATION metadata domain of the destination dataset. See
2201 : * SRC_GEOLOC_ARRAY description for details, assumptions, and defaults. If this
2202 : * option is set, DST_METHOD=GEOLOC_ARRAY will be assumed if not set.
2203 : * </li>
2204 : * <li>GEOLOC_NORMALIZE_LONGITUDE_MINUS_180_PLUS_180=YES/NO. (GDAL >= 3.12.0)
2205 : * Whether to force geolocation longitudes into -180,180 when longitude/latitude is
2206 : * the coordinate system of the geolocation arrays. The default is to enable this mode
2207 : * when the values in the geolocation array are in the -180,180, otherwise NO.
2208 : * </li>
2209 : * </ul>
2210 : *
2211 : * The use case for the *_APPROX_ERROR_* options is when defining an approximate
2212 : * transformer on top of the GenImgProjTransformer globally is not practical.
2213 : * Such a use case is when the source dataset has RPC with a RPC DEM. In such
2214 : * case we don't want to use the approximate transformer on the RPC
2215 : * transformation, as the RPC DEM generally involves non-linearities that the
2216 : * approximate transformer will not detect. In such case, we must a
2217 : * non-approximated GenImgProjTransformer, but it might be worthwhile to use
2218 : * approximate sub- transformers, for example on coordinate reprojection. For
2219 : * example if warping from a source dataset with RPC to a destination dataset
2220 : * with a UTM projection, since the inverse UTM transformation is rather costly.
2221 : * In which case, one can use the REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT and
2222 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT options.
2223 : *
2224 : * The list of supported options can also be programmatically obtained with
2225 : * GDALGetGenImgProjTranformerOptionList().
2226 : *
2227 : * @param hSrcDS source dataset, or NULL.
2228 : * @param hDstDS destination dataset (or NULL).
2229 : * @param papszOptions NULL-terminated list of string options (or NULL).
2230 : *
2231 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2232 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2233 : */
2234 : /* clang-format on */
2235 :
2236 2053 : void *GDALCreateGenImgProjTransformer2(GDALDatasetH hSrcDS, GDALDatasetH hDstDS,
2237 : CSLConstList papszOptions)
2238 :
2239 : {
2240 2053 : GDALValidateOptions(GDALGetGenImgProjTranformerOptionList(), papszOptions,
2241 : "option", "transformer options");
2242 :
2243 2053 : double dfWestLongitudeDeg = 0.0;
2244 2053 : double dfSouthLatitudeDeg = 0.0;
2245 2053 : double dfEastLongitudeDeg = 0.0;
2246 2053 : double dfNorthLatitudeDeg = 0.0;
2247 2053 : bool bHasAreaOfInterest = false;
2248 2053 : if (const char *pszAreaOfInterest =
2249 2053 : CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST"))
2250 : {
2251 : const CPLStringList aosTokens(
2252 0 : CSLTokenizeString2(pszAreaOfInterest, ", ", 0));
2253 0 : if (aosTokens.size() == 4)
2254 : {
2255 0 : dfWestLongitudeDeg = CPLAtof(aosTokens[0]);
2256 0 : dfSouthLatitudeDeg = CPLAtof(aosTokens[1]);
2257 0 : dfEastLongitudeDeg = CPLAtof(aosTokens[2]);
2258 0 : dfNorthLatitudeDeg = CPLAtof(aosTokens[3]);
2259 0 : bHasAreaOfInterest = true;
2260 : }
2261 : }
2262 :
2263 2053 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
2264 :
2265 : const auto SetAxisMapping =
2266 4054 : [papszOptions](OGRSpatialReference &oSRS, const char *pszPrefix)
2267 : {
2268 1352 : const char *pszMapping = CSLFetchNameValue(
2269 2704 : papszOptions, std::string(pszPrefix)
2270 1352 : .append("_DATA_AXIS_TO_SRS_AXIS_MAPPING")
2271 : .c_str());
2272 1352 : if (pszMapping)
2273 : {
2274 4 : CPLStringList aosTokens(CSLTokenizeString2(pszMapping, ",", 0));
2275 4 : std::vector<int> anMapping;
2276 6 : for (int i = 0; i < aosTokens.size(); ++i)
2277 4 : anMapping.push_back(atoi(aosTokens[i]));
2278 2 : oSRS.SetDataAxisToSRSAxisMapping(anMapping);
2279 : }
2280 : else
2281 : {
2282 1350 : const char *pszStrategy = CSLFetchNameValueDef(
2283 : papszOptions,
2284 2700 : std::string(pszPrefix).append("_AXIS_MAPPING_STRATEGY").c_str(),
2285 : "TRADITIONAL_GIS_ORDER");
2286 1350 : if (EQUAL(pszStrategy, "TRADITIONAL_GIS_ORDER"))
2287 1349 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2288 1 : else if (EQUAL(pszStrategy, "AUTHORITY_COMPLIANT"))
2289 1 : oSRS.SetAxisMappingStrategy(OAMS_AUTHORITY_COMPLIANT);
2290 : else
2291 : {
2292 0 : CPLError(CE_Warning, CPLE_AppDefined,
2293 : "Unrecognized value '%s' for %s", pszStrategy,
2294 0 : std::string(pszPrefix)
2295 0 : .append("_AXIS_MAPPING_STRATEGY")
2296 : .c_str());
2297 0 : return false;
2298 : }
2299 : }
2300 1352 : return true;
2301 2053 : };
2302 :
2303 : /* -------------------------------------------------------------------- */
2304 : /* Initialize the transform info. */
2305 : /* -------------------------------------------------------------------- */
2306 : GDALGenImgProjTransformInfo *psInfo =
2307 2053 : GDALCreateGenImgProjTransformerInternal();
2308 :
2309 : const auto DealWithForwardOrInverse =
2310 4092 : [bHasAreaOfInterest, &dfWestLongitudeDeg, &dfSouthLatitudeDeg,
2311 : &dfEastLongitudeDeg, &dfNorthLatitudeDeg, pszCO, papszOptions,
2312 : &SetAxisMapping](GDALGenImgProjTransformPart &part, GDALDatasetH hDS,
2313 : const char *pszPrefix, OGRSpatialReference &oSRS,
2314 39193 : bool &bCanUseGeoTransform)
2315 : {
2316 : const int nOrder =
2317 4092 : atoi(CSLFetchNameValueDef(papszOptions, "MAX_GCP_ORDER", "0"));
2318 :
2319 : const bool bGCPUseOK =
2320 4092 : CPLTestBool(CSLFetchNameValueDef(papszOptions, "GCPS_OK", "YES"));
2321 4092 : const int nMinimumGcps = atoi(
2322 : CSLFetchNameValueDef(papszOptions, "REFINE_MINIMUM_GCPS", "-1"));
2323 :
2324 : const char *pszRefineTolerance =
2325 4092 : CSLFetchNameValue(papszOptions, "REFINE_TOLERANCE");
2326 4092 : const bool bRefine = pszRefineTolerance != nullptr;
2327 : const double dfTolerance =
2328 4092 : pszRefineTolerance ? CPLAtof(pszRefineTolerance) : 0.0;
2329 :
2330 : const std::string osSRSOptionName =
2331 12276 : std::string(pszPrefix).append("_SRS");
2332 : const char *pszSRS =
2333 4092 : CSLFetchNameValue(papszOptions, osSRSOptionName.c_str());
2334 4092 : if (pszSRS)
2335 : {
2336 2700 : if (pszSRS[0] != '\0' &&
2337 1348 : oSRS.SetFromUserInput(pszSRS) != OGRERR_NONE)
2338 : {
2339 0 : CPLError(CE_Failure, CPLE_AppDefined,
2340 : "Failed to import coordinate system `%s'.", pszSRS);
2341 0 : return false;
2342 : }
2343 1352 : if (!SetAxisMapping(oSRS, osSRSOptionName.c_str()))
2344 0 : return false;
2345 : }
2346 :
2347 4092 : CSLConstList papszMD = nullptr;
2348 : GDALRPCInfoV2 sRPCInfo;
2349 :
2350 4092 : bCanUseGeoTransform = false;
2351 :
2352 4092 : const char *pszMethod = CSLFetchNameValue(
2353 8184 : papszOptions, std::string(pszPrefix).append("_METHOD").c_str());
2354 4092 : if (!pszMethod && EQUAL(pszPrefix, "SRC"))
2355 2015 : pszMethod = CSLFetchNameValue(papszOptions, "METHOD");
2356 :
2357 4092 : const char *pszGeolocArray = CSLFetchNameValue(
2358 : papszOptions,
2359 8184 : std::string(pszPrefix).append("_GEOLOC_ARRAY").c_str());
2360 4092 : if (!pszGeolocArray && EQUAL(pszPrefix, "SRC"))
2361 2052 : pszGeolocArray = CSLFetchNameValue(papszOptions, "GEOLOC_ARRAY");
2362 4092 : if (!pszMethod && pszGeolocArray != nullptr)
2363 9 : pszMethod = "GEOLOC_ARRAY";
2364 :
2365 : /* -------------------------------------------------------------------- */
2366 : /* Get forward and inverse geotransform for the source image. */
2367 : /* -------------------------------------------------------------------- */
2368 4092 : if (hDS == nullptr ||
2369 93 : (pszMethod != nullptr && EQUAL(pszMethod, "NO_GEOTRANSFORM")))
2370 : {
2371 1662 : part.adfGeoTransform[0] = 0.0;
2372 1662 : part.adfGeoTransform[1] = 1.0;
2373 1662 : part.adfGeoTransform[2] = 0.0;
2374 1662 : part.adfGeoTransform[3] = 0.0;
2375 1662 : part.adfGeoTransform[4] = 0.0;
2376 1662 : part.adfGeoTransform[5] = 1.0;
2377 1662 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2378 : sizeof(double) * 6);
2379 : }
2380 4791 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOTRANSFORM")) &&
2381 2361 : GDALGetGeoTransform(hDS, part.adfGeoTransform) == CE_None)
2382 : {
2383 2281 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2384 2281 : part.adfInvGeoTransform))
2385 : {
2386 0 : CPLError(CE_Failure, CPLE_AppDefined,
2387 : "Cannot invert geotransform");
2388 0 : return false;
2389 : }
2390 2281 : if (pszSRS == nullptr)
2391 : {
2392 2041 : auto hSRS = GDALGetSpatialRef(hDS);
2393 2041 : if (hSRS)
2394 1469 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2395 : }
2396 2281 : if (EQUAL(pszPrefix, "SRC"))
2397 : {
2398 1652 : if (!bHasAreaOfInterest && pszCO == nullptr && !oSRS.IsEmpty())
2399 : {
2400 1324 : GDALComputeAreaOfInterest(
2401 1324 : &oSRS, part.adfGeoTransform, GDALGetRasterXSize(hDS),
2402 : GDALGetRasterYSize(hDS), dfWestLongitudeDeg,
2403 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2404 : dfNorthLatitudeDeg);
2405 : }
2406 1652 : bCanUseGeoTransform = true;
2407 : }
2408 : }
2409 149 : else if (bGCPUseOK &&
2410 80 : ((pszMethod == nullptr && GDALGetGCPCount(hDS) >= 4 &&
2411 149 : GDALGetGCPCount(hDS) < 6) ||
2412 69 : (pszMethod != nullptr &&
2413 299 : EQUAL(pszMethod, "GCP_HOMOGRAPHY"))) &&
2414 22 : GDALGetGCPCount(hDS) > 0)
2415 : {
2416 22 : if (pszSRS == nullptr)
2417 : {
2418 21 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2419 21 : if (hSRS)
2420 21 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2421 : }
2422 :
2423 22 : const auto nGCPCount = GDALGetGCPCount(hDS);
2424 22 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2425 22 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2426 : papszOptions);
2427 :
2428 22 : part.pTransformArg =
2429 22 : GDALCreateHomographyTransformerFromGCPs(nGCPCount, pasGCPList);
2430 :
2431 22 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2432 22 : CPLFree(pasGCPList);
2433 :
2434 22 : if (part.pTransformArg == nullptr)
2435 : {
2436 0 : return false;
2437 : }
2438 22 : part.pTransformer = GDALHomographyTransform;
2439 : }
2440 127 : else if (bGCPUseOK &&
2441 127 : ((pszMethod == nullptr && nOrder >= 0) ||
2442 258 : (pszMethod && EQUAL(pszMethod, "GCP_POLYNOMIAL"))) &&
2443 63 : GDALGetGCPCount(hDS) > 0)
2444 : {
2445 9 : const int nSanitizedOrder = std::max(0, nOrder);
2446 :
2447 9 : if (pszSRS == nullptr)
2448 : {
2449 9 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2450 9 : if (hSRS)
2451 9 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2452 : }
2453 :
2454 9 : const auto nGCPCount = GDALGetGCPCount(hDS);
2455 9 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2456 9 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2457 : papszOptions);
2458 :
2459 9 : if (bRefine)
2460 : {
2461 0 : part.pTransformArg = GDALCreateGCPRefineTransformer(
2462 : nGCPCount, pasGCPList, nSanitizedOrder, FALSE, dfTolerance,
2463 : nMinimumGcps);
2464 : }
2465 : else
2466 : {
2467 9 : part.pTransformArg = GDALCreateGCPTransformer(
2468 : nGCPCount, pasGCPList, nSanitizedOrder, FALSE);
2469 : }
2470 :
2471 9 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2472 9 : CPLFree(pasGCPList);
2473 :
2474 9 : if (part.pTransformArg == nullptr)
2475 : {
2476 0 : return false;
2477 : }
2478 9 : part.pTransformer = GDALGCPTransform;
2479 : }
2480 :
2481 129 : else if (bGCPUseOK && GDALGetGCPCount(hDS) > 0 &&
2482 11 : ((pszMethod == nullptr && nOrder < 0) ||
2483 11 : (pszMethod && EQUAL(pszMethod, "GCP_TPS"))))
2484 : {
2485 11 : if (pszSRS == nullptr)
2486 : {
2487 11 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2488 11 : if (hSRS)
2489 10 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2490 : }
2491 :
2492 11 : const auto nGCPCount = GDALGetGCPCount(hDS);
2493 11 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2494 11 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2495 : papszOptions);
2496 :
2497 11 : part.pTransformArg = GDALCreateTPSTransformerInt(
2498 : nGCPCount, pasGCPList, FALSE, papszOptions);
2499 :
2500 11 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2501 11 : CPLFree(pasGCPList);
2502 :
2503 11 : if (part.pTransformArg == nullptr)
2504 : {
2505 2 : return false;
2506 : }
2507 9 : part.pTransformer = GDALTPSTransform;
2508 : }
2509 :
2510 53 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "RPC")) &&
2511 206 : (papszMD = GDALGetMetadata(hDS, "RPC")) != nullptr &&
2512 46 : GDALExtractRPCInfoV2(papszMD, &sRPCInfo))
2513 : {
2514 46 : CPLStringList aosOptions(papszOptions);
2515 87 : if (!CSLFetchNameValue(papszOptions, "RPC_HEIGHT") &&
2516 41 : !CSLFetchNameValue(papszOptions, "RPC_DEM"))
2517 : {
2518 8 : if (const char *pszHEIGHT_DEFAULT =
2519 8 : CSLFetchNameValue(papszMD, "HEIGHT_DEFAULT"))
2520 : {
2521 1 : CPLDebug("GDAL",
2522 : "For %s, using RPC_HEIGHT = HEIGHT_DEFAULT = %s",
2523 : pszPrefix, pszHEIGHT_DEFAULT);
2524 1 : aosOptions.SetNameValue("RPC_HEIGHT", pszHEIGHT_DEFAULT);
2525 : }
2526 : }
2527 46 : part.pTransformArg = GDALCreateRPCTransformerV2(&sRPCInfo, FALSE, 0,
2528 46 : aosOptions.List());
2529 46 : if (part.pTransformArg == nullptr)
2530 : {
2531 1 : return false;
2532 : }
2533 45 : part.pTransformer = GDALRPCTransform;
2534 45 : if (pszSRS == nullptr)
2535 : {
2536 45 : oSRS.SetFromUserInput(SRS_WKT_WGS84_LAT_LONG);
2537 45 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2538 : }
2539 : }
2540 :
2541 121 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOLOC_ARRAY")) &&
2542 60 : ((papszMD = GDALGetMetadata(hDS, "GEOLOCATION")) != nullptr ||
2543 : pszGeolocArray != nullptr))
2544 : {
2545 53 : CPLStringList aosGeolocMD; // keep in this scope
2546 53 : if (pszGeolocArray != nullptr)
2547 : {
2548 10 : if (papszMD != nullptr)
2549 : {
2550 0 : CPLError(
2551 : CE_Warning, CPLE_AppDefined,
2552 : "Both GEOLOCATION metadata domain on the source "
2553 : "dataset "
2554 : "and [%s_]GEOLOC_ARRAY transformer option are set. "
2555 : "Only using the later.",
2556 : pszPrefix);
2557 : }
2558 10 : aosGeolocMD = GDALCreateGeolocationMetadata(
2559 : hDS, pszGeolocArray,
2560 10 : /* bIsSource= */ EQUAL(pszPrefix, "SRC"));
2561 10 : if (aosGeolocMD.empty())
2562 : {
2563 3 : return false;
2564 : }
2565 7 : papszMD = aosGeolocMD.List();
2566 : }
2567 :
2568 50 : part.pTransformArg = GDALCreateGeoLocTransformerEx(
2569 : hDS, papszMD, FALSE, nullptr, papszOptions);
2570 50 : if (part.pTransformArg == nullptr)
2571 : {
2572 2 : return false;
2573 : }
2574 48 : part.pTransformer = GDALGeoLocTransform;
2575 48 : if (pszSRS == nullptr)
2576 : {
2577 48 : pszSRS = CSLFetchNameValue(papszMD, "SRS");
2578 48 : if (pszSRS)
2579 : {
2580 46 : oSRS.SetFromUserInput(pszSRS);
2581 46 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2582 : }
2583 : }
2584 : }
2585 :
2586 8 : else if (pszMethod != nullptr && EQUAL(pszPrefix, "SRC"))
2587 : {
2588 1 : CPLError(CE_Failure, CPLE_AppDefined,
2589 : "Unable to compute a %s based transformation between "
2590 : "pixel/line and georeferenced coordinates for %s.",
2591 : pszMethod, GDALGetDescription(hDS));
2592 :
2593 1 : return false;
2594 : }
2595 :
2596 : else
2597 : {
2598 7 : CPLError(CE_Failure, CPLE_AppDefined,
2599 : "Unable to compute a transformation between pixel/line "
2600 : "and georeferenced coordinates for %s. "
2601 : "There is no affine transformation and no GCPs. "
2602 : "Specify transformation option %s_METHOD=NO_GEOTRANSFORM "
2603 : "to bypass this check.",
2604 : GDALGetDescription(hDS), pszPrefix);
2605 :
2606 7 : return false;
2607 : }
2608 :
2609 : /* ---------------------------------------------------------------- */
2610 : /* Handle optional source approximation transformer. */
2611 : /* ---------------------------------------------------------------- */
2612 4076 : if (part.pTransformer)
2613 : {
2614 133 : const char *pszApproxErrorFwd = CSLFetchNameValue(
2615 266 : papszOptions, std::string(pszPrefix)
2616 133 : .append("_APPROX_ERROR_IN_SRS_UNIT")
2617 : .c_str());
2618 133 : const char *pszApproxErrorReverse = CSLFetchNameValue(
2619 266 : papszOptions, std::string(pszPrefix)
2620 133 : .append("_APPROX_ERROR_IN_PIXEL")
2621 : .c_str());
2622 133 : if (pszApproxErrorFwd && pszApproxErrorReverse)
2623 : {
2624 1 : void *pArg = GDALCreateApproxTransformer2(
2625 : part.pTransformer, part.pTransformArg,
2626 : CPLAtof(pszApproxErrorFwd), CPLAtof(pszApproxErrorReverse));
2627 1 : if (pArg == nullptr)
2628 : {
2629 0 : return false;
2630 : }
2631 1 : part.pTransformArg = pArg;
2632 1 : part.pTransformer = GDALApproxTransform;
2633 1 : GDALApproxTransformerOwnsSubtransformer(part.pTransformArg,
2634 : TRUE);
2635 : }
2636 : }
2637 :
2638 4076 : return true;
2639 2053 : };
2640 :
2641 : /* -------------------------------------------------------------------- */
2642 : /* Get forward and inverse geotransform for the source image. */
2643 : /* -------------------------------------------------------------------- */
2644 2053 : bool bCanUseSrcGeoTransform = false;
2645 4106 : OGRSpatialReference oSrcSRS;
2646 2053 : if (!DealWithForwardOrInverse(psInfo->sSrcParams, hSrcDS, "SRC", oSrcSRS,
2647 : bCanUseSrcGeoTransform))
2648 : {
2649 14 : GDALDestroyGenImgProjTransformer(psInfo);
2650 14 : return nullptr;
2651 : }
2652 :
2653 : /* -------------------------------------------------------------------- */
2654 : /* Get forward and inverse geotransform for destination image. */
2655 : /* If we have no destination use a unit transform. */
2656 : /* -------------------------------------------------------------------- */
2657 2039 : bool bIgnored = false;
2658 4078 : OGRSpatialReference oDstSRS;
2659 2039 : if (!DealWithForwardOrInverse(psInfo->sDstParams, hDstDS, "DST", oDstSRS,
2660 : bIgnored))
2661 : {
2662 2 : GDALDestroyGenImgProjTransformer(psInfo);
2663 2 : return nullptr;
2664 : }
2665 :
2666 : /* -------------------------------------------------------------------- */
2667 : /* Setup reprojection. */
2668 : /* -------------------------------------------------------------------- */
2669 :
2670 2037 : if (CPLFetchBool(papszOptions, "@STRIP_VERT_CS", false))
2671 : {
2672 1 : if (oSrcSRS.IsCompound())
2673 : {
2674 1 : oSrcSRS.StripVertical();
2675 : }
2676 1 : if (oDstSRS.IsCompound())
2677 : {
2678 0 : oDstSRS.StripVertical();
2679 : }
2680 : }
2681 :
2682 : const bool bMayInsertCenterLong =
2683 3363 : (bCanUseSrcGeoTransform && !oSrcSRS.IsEmpty() && hSrcDS &&
2684 1326 : CPLFetchBool(papszOptions, "INSERT_CENTER_LONG", true));
2685 : const char *pszSrcCoordEpoch =
2686 2037 : CSLFetchNameValue(papszOptions, "SRC_COORDINATE_EPOCH");
2687 : const char *pszDstCoordEpoch =
2688 2037 : CSLFetchNameValue(papszOptions, "DST_COORDINATE_EPOCH");
2689 3530 : if ((!oSrcSRS.IsEmpty() && !oDstSRS.IsEmpty() &&
2690 1379 : (pszSrcCoordEpoch || pszDstCoordEpoch || !oSrcSRS.IsSame(&oDstSRS) ||
2691 3530 : (oSrcSRS.IsGeographic() && bMayInsertCenterLong))) ||
2692 : pszCO)
2693 : {
2694 995 : CPLStringList aosOptions;
2695 :
2696 995 : if (bMayInsertCenterLong)
2697 : {
2698 977 : InsertCenterLong(hSrcDS, &oSrcSRS, &oDstSRS,
2699 : CSLFetchNameValue(papszOptions, "TARGET_EXTENT"),
2700 : aosOptions);
2701 : }
2702 :
2703 995 : if (CPLFetchBool(papszOptions, "PROMOTE_TO_3D", false))
2704 : {
2705 19 : oSrcSRS.PromoteTo3D(nullptr);
2706 19 : oDstSRS.PromoteTo3D(nullptr);
2707 : }
2708 :
2709 995 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
2710 33 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
2711 : {
2712 : aosOptions.SetNameValue(
2713 : "AREA_OF_INTEREST",
2714 : CPLSPrintf("%.16g,%.16g,%.16g,%.16g", dfWestLongitudeDeg,
2715 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2716 962 : dfNorthLatitudeDeg));
2717 : }
2718 995 : if (pszCO)
2719 : {
2720 7 : aosOptions.SetNameValue("COORDINATE_OPERATION", pszCO);
2721 : }
2722 :
2723 : const char *pszCoordEpoch =
2724 995 : CSLFetchNameValue(papszOptions, "COORDINATE_EPOCH");
2725 995 : if (pszCoordEpoch)
2726 : {
2727 1 : aosOptions.SetNameValue("COORDINATE_EPOCH", pszCoordEpoch);
2728 : }
2729 :
2730 995 : if (pszSrcCoordEpoch)
2731 : {
2732 0 : aosOptions.SetNameValue("SRC_COORDINATE_EPOCH", pszSrcCoordEpoch);
2733 0 : oSrcSRS.SetCoordinateEpoch(CPLAtof(pszSrcCoordEpoch));
2734 : }
2735 :
2736 995 : if (pszDstCoordEpoch)
2737 : {
2738 0 : aosOptions.SetNameValue("DST_COORDINATE_EPOCH", pszDstCoordEpoch);
2739 0 : oDstSRS.SetCoordinateEpoch(CPLAtof(pszDstCoordEpoch));
2740 : }
2741 :
2742 995 : if (const char *pszAllowBallpark =
2743 995 : CSLFetchNameValue(papszOptions, "ALLOW_BALLPARK"))
2744 : {
2745 2 : aosOptions.SetNameValue("ALLOW_BALLPARK", pszAllowBallpark);
2746 : }
2747 :
2748 995 : if (const char *pszOnlyBest =
2749 995 : CSLFetchNameValue(papszOptions, "ONLY_BEST"))
2750 : {
2751 1 : aosOptions.SetNameValue("ONLY_BEST", pszOnlyBest);
2752 : }
2753 :
2754 999 : psInfo->pReprojectArg = GDALCreateReprojectionTransformerEx(
2755 995 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS)
2756 : : nullptr,
2757 995 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS)
2758 : : nullptr,
2759 995 : aosOptions.List());
2760 :
2761 995 : if (pszCO)
2762 : {
2763 7 : psInfo->bHasCustomTransformationPipeline = true;
2764 : }
2765 :
2766 995 : if (psInfo->pReprojectArg == nullptr)
2767 : {
2768 5 : GDALDestroyGenImgProjTransformer(psInfo);
2769 5 : return nullptr;
2770 : }
2771 990 : psInfo->pReproject = GDALReprojectionTransform;
2772 :
2773 : /* --------------------------------------------------------------------
2774 : */
2775 : /* Handle optional reprojection approximation transformer. */
2776 : /* --------------------------------------------------------------------
2777 : */
2778 990 : const char *psApproxErrorFwd = CSLFetchNameValue(
2779 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT");
2780 990 : const char *psApproxErrorReverse = CSLFetchNameValue(
2781 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT");
2782 990 : if (psApproxErrorFwd && psApproxErrorReverse)
2783 : {
2784 1 : void *pArg = GDALCreateApproxTransformer2(
2785 : psInfo->pReproject, psInfo->pReprojectArg,
2786 : CPLAtof(psApproxErrorFwd), CPLAtof(psApproxErrorReverse));
2787 1 : if (pArg == nullptr)
2788 : {
2789 0 : GDALDestroyGenImgProjTransformer(psInfo);
2790 0 : return nullptr;
2791 : }
2792 1 : psInfo->pReprojectArg = pArg;
2793 1 : psInfo->pReproject = GDALApproxTransform;
2794 1 : GDALApproxTransformerOwnsSubtransformer(psInfo->pReprojectArg,
2795 : TRUE);
2796 : }
2797 : }
2798 :
2799 2032 : return psInfo;
2800 : }
2801 :
2802 : /************************************************************************/
2803 : /* GDALRefreshGenImgProjTransformer() */
2804 : /************************************************************************/
2805 :
2806 1286 : void GDALRefreshGenImgProjTransformer(void *hTransformArg)
2807 : {
2808 1286 : GDALGenImgProjTransformInfo *psInfo =
2809 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
2810 :
2811 2100 : if (psInfo->pReprojectArg &&
2812 814 : psInfo->bCheckWithInvertPROJ != GetCurrentCheckWithInvertPROJ())
2813 : {
2814 70 : psInfo->bCheckWithInvertPROJ = !psInfo->bCheckWithInvertPROJ;
2815 :
2816 : CPLXMLNode *psXML =
2817 70 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
2818 70 : GDALDestroyTransformer(psInfo->pReprojectArg);
2819 70 : GDALDeserializeTransformer(psXML, &psInfo->pReproject,
2820 : &psInfo->pReprojectArg);
2821 70 : CPLDestroyXMLNode(psXML);
2822 : }
2823 1286 : }
2824 :
2825 : /************************************************************************/
2826 : /* GDALCreateGenImgProjTransformer3() */
2827 : /************************************************************************/
2828 :
2829 : /**
2830 : * Create image to image transformer.
2831 : *
2832 : * This function creates a transformation object that maps from pixel/line
2833 : * coordinates on one image to pixel/line coordinates on another image. The
2834 : * images may potentially be georeferenced in different coordinate systems,
2835 : * and may used GCPs to map between their pixel/line coordinates and
2836 : * georeferenced coordinates (as opposed to the default assumption that their
2837 : * geotransform should be used).
2838 : *
2839 : * This transformer potentially performs three concatenated transformations.
2840 : *
2841 : * The first stage is from source image pixel/line coordinates to source
2842 : * image georeferenced coordinates, and may be done using the geotransform,
2843 : * or if not defined using a polynomial model derived from GCPs. If GCPs
2844 : * are used this stage is accomplished using GDALGCPTransform().
2845 : *
2846 : * The second stage is to change projections from the source coordinate system
2847 : * to the destination coordinate system, assuming they differ. This is
2848 : * accomplished internally using GDALReprojectionTransform().
2849 : *
2850 : * The third stage is converting from destination image georeferenced
2851 : * coordinates to destination image coordinates. This is done using the
2852 : * destination image geotransform, or if not available, using a polynomial
2853 : * model derived from GCPs. If GCPs are used this stage is accomplished using
2854 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
2855 : * transformation is created.
2856 : *
2857 : * @param pszSrcWKT source WKT (or NULL).
2858 : * @param padfSrcGeoTransform source geotransform (or NULL).
2859 : * @param pszDstWKT destination WKT (or NULL).
2860 : * @param padfDstGeoTransform destination geotransform (or NULL).
2861 : *
2862 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2863 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2864 : */
2865 :
2866 0 : void *GDALCreateGenImgProjTransformer3(const char *pszSrcWKT,
2867 : const double *padfSrcGeoTransform,
2868 : const char *pszDstWKT,
2869 : const double *padfDstGeoTransform)
2870 :
2871 : {
2872 0 : OGRSpatialReference oSrcSRS;
2873 0 : if (pszSrcWKT)
2874 : {
2875 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2876 0 : if (pszSrcWKT[0] != '\0' &&
2877 0 : oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
2878 : {
2879 0 : CPLError(CE_Failure, CPLE_AppDefined,
2880 : "Failed to import coordinate system `%s'.", pszSrcWKT);
2881 0 : return nullptr;
2882 : }
2883 : }
2884 :
2885 0 : OGRSpatialReference oDstSRS;
2886 0 : if (pszDstWKT)
2887 : {
2888 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2889 0 : if (pszDstWKT[0] != '\0' &&
2890 0 : oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
2891 : {
2892 0 : CPLError(CE_Failure, CPLE_AppDefined,
2893 : "Failed to import coordinate system `%s'.", pszDstWKT);
2894 0 : return nullptr;
2895 : }
2896 : }
2897 0 : return GDALCreateGenImgProjTransformer4(
2898 : OGRSpatialReference::ToHandle(&oSrcSRS), padfSrcGeoTransform,
2899 0 : OGRSpatialReference::ToHandle(&oDstSRS), padfDstGeoTransform, nullptr);
2900 : }
2901 :
2902 : /************************************************************************/
2903 : /* GDALCreateGenImgProjTransformer4() */
2904 : /************************************************************************/
2905 :
2906 : /**
2907 : * Create image to image transformer.
2908 : *
2909 : * Similar to GDALCreateGenImgProjTransformer3(), except that it takes
2910 : * OGRSpatialReferenceH objects and options.
2911 : * The options are the ones supported by GDALCreateReprojectionTransformerEx()
2912 : *
2913 : * @since GDAL 3.0
2914 : */
2915 16 : void *GDALCreateGenImgProjTransformer4(OGRSpatialReferenceH hSrcSRS,
2916 : const double *padfSrcGeoTransform,
2917 : OGRSpatialReferenceH hDstSRS,
2918 : const double *padfDstGeoTransform,
2919 : const char *const *papszOptions)
2920 : {
2921 : /* -------------------------------------------------------------------- */
2922 : /* Initialize the transform info. */
2923 : /* -------------------------------------------------------------------- */
2924 : GDALGenImgProjTransformInfo *psInfo =
2925 16 : GDALCreateGenImgProjTransformerInternal();
2926 :
2927 : /* -------------------------------------------------------------------- */
2928 : /* Get forward and inverse geotransform for the source image. */
2929 : /* -------------------------------------------------------------------- */
2930 :
2931 : const auto SetParams =
2932 30 : [](GDALGenImgProjTransformPart &part, const double *padfGT)
2933 : {
2934 30 : if (padfGT)
2935 : {
2936 30 : memcpy(part.adfGeoTransform, padfGT, sizeof(part.adfGeoTransform));
2937 30 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2938 30 : part.adfInvGeoTransform))
2939 : {
2940 2 : CPLError(CE_Failure, CPLE_AppDefined,
2941 : "Cannot invert geotransform");
2942 2 : return false;
2943 : }
2944 : }
2945 : else
2946 : {
2947 0 : part.adfGeoTransform[0] = 0.0;
2948 0 : part.adfGeoTransform[1] = 1.0;
2949 0 : part.adfGeoTransform[2] = 0.0;
2950 0 : part.adfGeoTransform[3] = 0.0;
2951 0 : part.adfGeoTransform[4] = 0.0;
2952 0 : part.adfGeoTransform[5] = 1.0;
2953 0 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2954 : sizeof(double) * 6);
2955 : }
2956 28 : return true;
2957 : };
2958 :
2959 16 : if (!SetParams(psInfo->sSrcParams, padfSrcGeoTransform))
2960 : {
2961 1 : GDALDestroyGenImgProjTransformer(psInfo);
2962 1 : return nullptr;
2963 : }
2964 :
2965 : /* -------------------------------------------------------------------- */
2966 : /* Setup reprojection. */
2967 : /* -------------------------------------------------------------------- */
2968 15 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
2969 15 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
2970 30 : if (!poSrcSRS->IsEmpty() && !poDstSRS->IsEmpty() &&
2971 15 : !poSrcSRS->IsSame(poDstSRS))
2972 : {
2973 4 : psInfo->pReprojectArg =
2974 4 : GDALCreateReprojectionTransformerEx(hSrcSRS, hDstSRS, papszOptions);
2975 4 : if (psInfo->pReprojectArg == nullptr)
2976 : {
2977 1 : GDALDestroyGenImgProjTransformer(psInfo);
2978 1 : return nullptr;
2979 : }
2980 3 : psInfo->pReproject = GDALReprojectionTransform;
2981 : }
2982 :
2983 : /* -------------------------------------------------------------------- */
2984 : /* Get forward and inverse geotransform for destination image. */
2985 : /* If we have no destination matrix use a unit transform. */
2986 : /* -------------------------------------------------------------------- */
2987 14 : if (!SetParams(psInfo->sDstParams, padfDstGeoTransform))
2988 : {
2989 1 : GDALDestroyGenImgProjTransformer(psInfo);
2990 1 : return nullptr;
2991 : }
2992 :
2993 13 : return psInfo;
2994 : }
2995 :
2996 : /************************************************************************/
2997 : /* GDALSetGenImgProjTransformerDstGeoTransform() */
2998 : /************************************************************************/
2999 :
3000 : /**
3001 : * Set GenImgProj output geotransform.
3002 : *
3003 : * Normally the "destination geotransform", or transformation between
3004 : * georeferenced output coordinates and pixel/line coordinates on the
3005 : * destination file is extracted from the destination file by
3006 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
3007 : * info. However, sometimes it is inconvenient to have an output file
3008 : * handle with appropriate geotransform information when creating the
3009 : * transformation. For these cases, this function can be used to apply
3010 : * the destination geotransform.
3011 : *
3012 : * @param hTransformArg the handle to update.
3013 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
3014 : */
3015 :
3016 1013 : void GDALSetGenImgProjTransformerDstGeoTransform(void *hTransformArg,
3017 : const double *padfGeoTransform)
3018 :
3019 : {
3020 1013 : VALIDATE_POINTER0(hTransformArg,
3021 : "GDALSetGenImgProjTransformerDstGeoTransform");
3022 :
3023 1013 : GDALGenImgProjTransformInfo *psInfo =
3024 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3025 :
3026 1013 : memcpy(psInfo->sDstParams.adfGeoTransform, padfGeoTransform,
3027 : sizeof(double) * 6);
3028 1013 : if (!GDALInvGeoTransform(psInfo->sDstParams.adfGeoTransform,
3029 1013 : psInfo->sDstParams.adfInvGeoTransform))
3030 : {
3031 0 : CPLError(CE_Failure, CPLE_AppDefined, "Cannot invert geotransform");
3032 : }
3033 : }
3034 :
3035 : /************************************************************************/
3036 : /* GDALDestroyGenImgProjTransformer() */
3037 : /************************************************************************/
3038 :
3039 : /**
3040 : * GenImgProjTransformer deallocator.
3041 : *
3042 : * This function is used to deallocate the handle created with
3043 : * GDALCreateGenImgProjTransformer().
3044 : *
3045 : * @param hTransformArg the handle to deallocate.
3046 : */
3047 :
3048 2324 : void GDALDestroyGenImgProjTransformer(void *hTransformArg)
3049 :
3050 : {
3051 2324 : if (hTransformArg == nullptr)
3052 0 : return;
3053 :
3054 2324 : GDALGenImgProjTransformInfo *psInfo =
3055 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3056 :
3057 2324 : if (psInfo->sSrcParams.pTransformArg != nullptr)
3058 149 : GDALDestroyTransformer(psInfo->sSrcParams.pTransformArg);
3059 :
3060 2324 : if (psInfo->sDstParams.pTransformArg != nullptr)
3061 7 : GDALDestroyTransformer(psInfo->sDstParams.pTransformArg);
3062 :
3063 2324 : if (psInfo->pReprojectArg != nullptr)
3064 1126 : GDALDestroyTransformer(psInfo->pReprojectArg);
3065 :
3066 2324 : CPLFree(psInfo);
3067 : }
3068 :
3069 : /************************************************************************/
3070 : /* GDALGenImgProjTransform() */
3071 : /************************************************************************/
3072 :
3073 : /**
3074 : * Perform general image reprojection transformation.
3075 : *
3076 : * Actually performs the transformation setup in
3077 : * GDALCreateGenImgProjTransformer(). This function matches the signature
3078 : * required by the GDALTransformerFunc(), and more details on the arguments
3079 : * can be found in that topic.
3080 : */
3081 :
3082 : #ifdef DEBUG_APPROX_TRANSFORMER
3083 : int countGDALGenImgProjTransform = 0;
3084 : #endif
3085 :
3086 2365360 : int GDALGenImgProjTransform(void *pTransformArgIn, int bDstToSrc,
3087 : int nPointCount, double *padfX, double *padfY,
3088 : double *padfZ, int *panSuccess)
3089 : {
3090 : // Sanity check (see issue GH #13498)
3091 2365360 : if (nullptr == pTransformArgIn)
3092 0 : return FALSE;
3093 :
3094 2365360 : GDALGenImgProjTransformInfo *psInfo =
3095 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArgIn);
3096 :
3097 : #ifdef DEBUG_APPROX_TRANSFORMER
3098 : CPLAssert(nPointCount > 0);
3099 : countGDALGenImgProjTransform += nPointCount;
3100 : #endif
3101 :
3102 21550600 : for (int i = 0; i < nPointCount; i++)
3103 : {
3104 19185200 : panSuccess[i] = (padfX[i] != HUGE_VAL && padfY[i] != HUGE_VAL);
3105 : }
3106 :
3107 2365360 : int ret = TRUE;
3108 :
3109 : /* -------------------------------------------------------------------- */
3110 : /* Convert from src (dst) pixel/line to src (dst) */
3111 : /* georeferenced coordinates. */
3112 : /* -------------------------------------------------------------------- */
3113 : {
3114 2365360 : const auto params = bDstToSrc ? psInfo->sDstParams : psInfo->sSrcParams;
3115 2365360 : const double *padfGeoTransform = params.adfGeoTransform;
3116 2365360 : void *pTransformArg = params.pTransformArg;
3117 2365360 : GDALTransformerFunc pTransformer = params.pTransformer;
3118 :
3119 2365360 : if (pTransformArg != nullptr)
3120 : {
3121 42075 : if (!pTransformer(pTransformArg, FALSE, nPointCount, padfX, padfY,
3122 : padfZ, panSuccess))
3123 1778 : ret = FALSE;
3124 : }
3125 : else
3126 : {
3127 21426100 : for (int i = 0; i < nPointCount; i++)
3128 : {
3129 19102800 : if (!panSuccess[i])
3130 2071 : continue;
3131 :
3132 19100800 : const double dfNewX = padfGeoTransform[0] +
3133 19100800 : padfX[i] * padfGeoTransform[1] +
3134 19100800 : padfY[i] * padfGeoTransform[2];
3135 19100800 : const double dfNewY = padfGeoTransform[3] +
3136 19100800 : padfX[i] * padfGeoTransform[4] +
3137 19100800 : padfY[i] * padfGeoTransform[5];
3138 :
3139 19100800 : padfX[i] = dfNewX;
3140 19100800 : padfY[i] = dfNewY;
3141 : }
3142 : }
3143 : }
3144 :
3145 : /* -------------------------------------------------------------------- */
3146 : /* Reproject if needed. */
3147 : /* -------------------------------------------------------------------- */
3148 2365360 : if (psInfo->pReprojectArg)
3149 : {
3150 1911620 : if (!psInfo->pReproject(psInfo->pReprojectArg, bDstToSrc, nPointCount,
3151 : padfX, padfY, padfZ, panSuccess))
3152 20351 : ret = FALSE;
3153 : }
3154 :
3155 : /* -------------------------------------------------------------------- */
3156 : /* Convert dst (src) georef coordinates back to pixel/line. */
3157 : /* -------------------------------------------------------------------- */
3158 : {
3159 2365360 : const auto params = bDstToSrc ? psInfo->sSrcParams : psInfo->sDstParams;
3160 2365360 : const double *padfInvGeoTransform = params.adfInvGeoTransform;
3161 2365360 : void *pTransformArg = params.pTransformArg;
3162 2365360 : GDALTransformerFunc pTransformer = params.pTransformer;
3163 :
3164 2365360 : if (pTransformArg != nullptr)
3165 : {
3166 52330 : if (!pTransformer(pTransformArg, TRUE, nPointCount, padfX, padfY,
3167 : padfZ, panSuccess))
3168 1686 : ret = FALSE;
3169 : }
3170 : else
3171 : {
3172 20604100 : for (int i = 0; i < nPointCount; i++)
3173 : {
3174 18291000 : if (!panSuccess[i])
3175 3560790 : continue;
3176 :
3177 14730200 : const double dfNewX = padfInvGeoTransform[0] +
3178 14730200 : padfX[i] * padfInvGeoTransform[1] +
3179 14730200 : padfY[i] * padfInvGeoTransform[2];
3180 14730200 : const double dfNewY = padfInvGeoTransform[3] +
3181 14730200 : padfX[i] * padfInvGeoTransform[4] +
3182 14730200 : padfY[i] * padfInvGeoTransform[5];
3183 :
3184 14730200 : padfX[i] = dfNewX;
3185 14730200 : padfY[i] = dfNewY;
3186 : }
3187 : }
3188 : }
3189 :
3190 2365360 : return ret;
3191 : }
3192 :
3193 : /************************************************************************/
3194 : /* GDALTransformLonLatToDestGenImgProjTransformer() */
3195 : /************************************************************************/
3196 :
3197 3186 : int GDALTransformLonLatToDestGenImgProjTransformer(void *hTransformArg,
3198 : double *pdfX, double *pdfY)
3199 : {
3200 3186 : GDALGenImgProjTransformInfo *psInfo =
3201 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3202 :
3203 3186 : if (psInfo->pReprojectArg == nullptr ||
3204 1732 : psInfo->pReproject != GDALReprojectionTransform)
3205 1458 : return false;
3206 :
3207 1728 : GDALReprojectionTransformInfo *psReprojInfo =
3208 : static_cast<GDALReprojectionTransformInfo *>(psInfo->pReprojectArg);
3209 3456 : if (psReprojInfo->poForwardTransform == nullptr ||
3210 1728 : psReprojInfo->poForwardTransform->GetSourceCS() == nullptr)
3211 2 : return false;
3212 :
3213 1726 : double z = 0;
3214 1726 : int success = true;
3215 1726 : auto poSourceCRS = psReprojInfo->poForwardTransform->GetSourceCS();
3216 3060 : if (poSourceCRS->IsGeographic() &&
3217 1334 : std::fabs(poSourceCRS->GetAngularUnits() -
3218 1334 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9)
3219 : {
3220 : // Optimization to avoid creating a OGRCoordinateTransformation
3221 1332 : OGRAxisOrientation eSourceFirstAxisOrient = OAO_Other;
3222 1332 : poSourceCRS->GetAxis(nullptr, 0, &eSourceFirstAxisOrient);
3223 1332 : const auto &mapping = poSourceCRS->GetDataAxisToSRSAxisMapping();
3224 2664 : if ((mapping[0] == 2 && eSourceFirstAxisOrient == OAO_East) ||
3225 1332 : (mapping[0] == 1 && eSourceFirstAxisOrient != OAO_East))
3226 : {
3227 6 : std::swap(*pdfX, *pdfY);
3228 : }
3229 : }
3230 : else
3231 : {
3232 : auto poLongLat =
3233 394 : std::unique_ptr<OGRSpatialReference>(poSourceCRS->CloneGeogCS());
3234 394 : if (poLongLat == nullptr)
3235 0 : return false;
3236 394 : poLongLat->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3237 :
3238 : const bool bCurrentCheckWithInvertProj =
3239 394 : GetCurrentCheckWithInvertPROJ();
3240 394 : if (!bCurrentCheckWithInvertProj)
3241 394 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", "YES");
3242 : auto poCT = std::unique_ptr<OGRCoordinateTransformation>(
3243 394 : OGRCreateCoordinateTransformation(poLongLat.get(), poSourceCRS));
3244 394 : if (!bCurrentCheckWithInvertProj)
3245 394 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", nullptr);
3246 394 : if (poCT == nullptr)
3247 0 : return false;
3248 :
3249 394 : poCT->SetEmitErrors(false);
3250 394 : if (!poCT->Transform(1, pdfX, pdfY))
3251 4 : return false;
3252 :
3253 390 : if (!psInfo->pReproject(psInfo->pReprojectArg, false, 1, pdfX, pdfY, &z,
3254 636 : &success) ||
3255 246 : !success)
3256 : {
3257 144 : return false;
3258 : }
3259 : }
3260 :
3261 1578 : double *padfGeoTransform = psInfo->sDstParams.adfInvGeoTransform;
3262 1578 : void *pTransformArg = psInfo->sDstParams.pTransformArg;
3263 1578 : GDALTransformerFunc pTransformer = psInfo->sDstParams.pTransformer;
3264 1578 : if (pTransformArg != nullptr)
3265 : {
3266 4 : if (!pTransformer(pTransformArg, TRUE, 1, pdfX, pdfY, &z, &success) ||
3267 0 : !success)
3268 : {
3269 4 : return false;
3270 : }
3271 : }
3272 : else
3273 : {
3274 1574 : const double dfNewX = padfGeoTransform[0] +
3275 1574 : pdfX[0] * padfGeoTransform[1] +
3276 1574 : pdfY[0] * padfGeoTransform[2];
3277 1574 : const double dfNewY = padfGeoTransform[3] +
3278 1574 : pdfX[0] * padfGeoTransform[4] +
3279 1574 : pdfY[0] * padfGeoTransform[5];
3280 :
3281 1574 : pdfX[0] = dfNewX;
3282 1574 : pdfY[0] = dfNewY;
3283 : }
3284 :
3285 1574 : return true;
3286 : }
3287 :
3288 : /************************************************************************/
3289 : /* GDALSerializeGenImgProjTransformer() */
3290 : /************************************************************************/
3291 :
3292 78 : static CPLXMLNode *GDALSerializeGenImgProjTransformer(void *pTransformArg)
3293 :
3294 : {
3295 78 : GDALGenImgProjTransformInfo *psInfo =
3296 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArg);
3297 :
3298 : CPLXMLNode *psTree =
3299 78 : CPLCreateXMLNode(nullptr, CXT_Element, "GenImgProjTransformer");
3300 :
3301 : const auto SerializePart =
3302 455 : [psTree](const char *pszPrefix, const GDALGenImgProjTransformPart &part)
3303 : {
3304 156 : char szWork[200] = {};
3305 :
3306 : /* ------------------------------------------------------------- */
3307 : /* Handle transformation. */
3308 : /* ------------------------------------------------------------- */
3309 156 : if (part.pTransformArg != nullptr)
3310 : {
3311 : CPLXMLNode *psTransformer =
3312 13 : GDALSerializeTransformer(part.pTransformer, part.pTransformArg);
3313 13 : if (psTransformer != nullptr)
3314 : {
3315 13 : CPLXMLNode *psTransformerContainer = CPLCreateXMLNode(
3316 : psTree, CXT_Element,
3317 : CPLSPrintf("%s%s", pszPrefix, psTransformer->pszValue));
3318 :
3319 13 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3320 : }
3321 : }
3322 :
3323 : /* ------------------------------------------------------------- */
3324 : /* Handle geotransforms. */
3325 : /* ------------------------------------------------------------- */
3326 : else
3327 : {
3328 143 : CPLsnprintf(szWork, sizeof(szWork),
3329 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3330 143 : part.adfGeoTransform[0], part.adfGeoTransform[1],
3331 143 : part.adfGeoTransform[2], part.adfGeoTransform[3],
3332 143 : part.adfGeoTransform[4], part.adfGeoTransform[5]);
3333 143 : CPLCreateXMLElementAndValue(
3334 : psTree, CPLSPrintf("%sGeoTransform", pszPrefix), szWork);
3335 :
3336 143 : CPLsnprintf(szWork, sizeof(szWork),
3337 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3338 143 : part.adfInvGeoTransform[0], part.adfInvGeoTransform[1],
3339 143 : part.adfInvGeoTransform[2], part.adfInvGeoTransform[3],
3340 143 : part.adfInvGeoTransform[4], part.adfInvGeoTransform[5]);
3341 143 : CPLCreateXMLElementAndValue(
3342 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix), szWork);
3343 : }
3344 156 : };
3345 :
3346 78 : SerializePart("Src", psInfo->sSrcParams);
3347 78 : SerializePart("Dst", psInfo->sDstParams);
3348 :
3349 : /* -------------------------------------------------------------------- */
3350 : /* Do we have a reprojection transformer? */
3351 : /* -------------------------------------------------------------------- */
3352 78 : if (psInfo->pReprojectArg != nullptr)
3353 : {
3354 :
3355 : CPLXMLNode *psTransformerContainer =
3356 51 : CPLCreateXMLNode(psTree, CXT_Element, "ReprojectTransformer");
3357 :
3358 : CPLXMLNode *psTransformer =
3359 51 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
3360 51 : if (psTransformer != nullptr)
3361 51 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3362 : }
3363 :
3364 78 : return psTree;
3365 : }
3366 :
3367 : /************************************************************************/
3368 : /* GDALDeserializeGeoTransform() */
3369 : /************************************************************************/
3370 :
3371 739 : static void GDALDeserializeGeoTransform(const char *pszGT,
3372 : double adfGeoTransform[6])
3373 : {
3374 739 : CPLsscanf(pszGT, "%lf,%lf,%lf,%lf,%lf,%lf", adfGeoTransform + 0,
3375 : adfGeoTransform + 1, adfGeoTransform + 2, adfGeoTransform + 3,
3376 : adfGeoTransform + 4, adfGeoTransform + 5);
3377 739 : }
3378 :
3379 : /************************************************************************/
3380 : /* GDALDeserializeGenImgProjTransformer() */
3381 : /************************************************************************/
3382 :
3383 199 : void *GDALDeserializeGenImgProjTransformer(CPLXMLNode *psTree)
3384 :
3385 : {
3386 : /* -------------------------------------------------------------------- */
3387 : /* Initialize the transform info. */
3388 : /* -------------------------------------------------------------------- */
3389 : GDALGenImgProjTransformInfo *psInfo =
3390 199 : GDALCreateGenImgProjTransformerInternal();
3391 :
3392 : const auto DeserializePart =
3393 1194 : [psTree](const char *pszPrefix, GDALGenImgProjTransformPart &part)
3394 : {
3395 : /* ----------------------------------------------------------------- */
3396 : /* Geotransform */
3397 : /* ----------------------------------------------------------------- */
3398 398 : if (const auto psGTNode =
3399 398 : CPLGetXMLNode(psTree, CPLSPrintf("%sGeoTransform", pszPrefix)))
3400 : {
3401 382 : GDALDeserializeGeoTransform(CPLGetXMLValue(psGTNode, "", ""),
3402 382 : part.adfGeoTransform);
3403 :
3404 382 : if (const auto psInvGTNode = CPLGetXMLNode(
3405 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix)))
3406 : {
3407 357 : GDALDeserializeGeoTransform(CPLGetXMLValue(psInvGTNode, "", ""),
3408 357 : part.adfInvGeoTransform);
3409 : }
3410 : else
3411 : {
3412 25 : if (!GDALInvGeoTransform(part.adfGeoTransform,
3413 25 : part.adfInvGeoTransform))
3414 : {
3415 0 : CPLError(CE_Failure, CPLE_AppDefined,
3416 : "Cannot invert geotransform");
3417 : }
3418 : }
3419 : }
3420 :
3421 : /* ---------------------------------------------------------------- */
3422 : /* Transform */
3423 : /* ---------------------------------------------------------------- */
3424 : else
3425 : {
3426 16 : for (CPLXMLNode *psIter = psTree->psChild; psIter != nullptr;
3427 0 : psIter = psIter->psNext)
3428 : {
3429 16 : if (psIter->eType == CXT_Element &&
3430 16 : STARTS_WITH_CI(psIter->pszValue, pszPrefix))
3431 : {
3432 16 : GDALDeserializeTransformer(psIter->psChild,
3433 : &part.pTransformer,
3434 : &part.pTransformArg);
3435 16 : break;
3436 : }
3437 : }
3438 : }
3439 597 : };
3440 :
3441 199 : DeserializePart("Src", psInfo->sSrcParams);
3442 199 : DeserializePart("Dst", psInfo->sDstParams);
3443 :
3444 : /* -------------------------------------------------------------------- */
3445 : /* Reproject transformer */
3446 : /* -------------------------------------------------------------------- */
3447 199 : CPLXMLNode *psSubtree = CPLGetXMLNode(psTree, "ReprojectTransformer");
3448 199 : if (psSubtree != nullptr && psSubtree->psChild != nullptr)
3449 : {
3450 98 : GDALDeserializeTransformer(psSubtree->psChild, &psInfo->pReproject,
3451 : &psInfo->pReprojectArg);
3452 : }
3453 :
3454 199 : return psInfo;
3455 : }
3456 :
3457 : /************************************************************************/
3458 : /* GDALCreateReprojectionTransformer() */
3459 : /************************************************************************/
3460 :
3461 : /**
3462 : * Create reprojection transformer.
3463 : *
3464 : * Creates a callback data structure suitable for use with
3465 : * GDALReprojectionTransformation() to represent a transformation from
3466 : * one geographic or projected coordinate system to another. On input
3467 : * the coordinate systems are described in OpenGIS WKT format.
3468 : *
3469 : * Internally the OGRCoordinateTransformation object is used to implement
3470 : * the reprojection.
3471 : *
3472 : * @param pszSrcWKT the coordinate system for the source coordinate system.
3473 : * @param pszDstWKT the coordinate system for the destination coordinate
3474 : * system.
3475 : *
3476 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3477 : * system fails to initialize the reprojection.
3478 : **/
3479 :
3480 0 : void *GDALCreateReprojectionTransformer(const char *pszSrcWKT,
3481 : const char *pszDstWKT)
3482 :
3483 : {
3484 : /* -------------------------------------------------------------------- */
3485 : /* Ingest the SRS definitions. */
3486 : /* -------------------------------------------------------------------- */
3487 0 : OGRSpatialReference oSrcSRS;
3488 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3489 0 : if (oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
3490 : {
3491 0 : CPLError(CE_Failure, CPLE_AppDefined,
3492 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3493 0 : return nullptr;
3494 : }
3495 :
3496 0 : OGRSpatialReference oDstSRS;
3497 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3498 0 : if (oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
3499 : {
3500 0 : CPLError(CE_Failure, CPLE_AppDefined,
3501 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3502 0 : return nullptr;
3503 : }
3504 :
3505 0 : return GDALCreateReprojectionTransformerEx(
3506 : OGRSpatialReference::ToHandle(&oSrcSRS),
3507 0 : OGRSpatialReference::ToHandle(&oDstSRS), nullptr);
3508 : }
3509 :
3510 : /************************************************************************/
3511 : /* GDALCreateReprojectionTransformerEx() */
3512 : /************************************************************************/
3513 :
3514 : /**
3515 : * Create reprojection transformer.
3516 : *
3517 : * Creates a callback data structure suitable for use with
3518 : * GDALReprojectionTransformation() to represent a transformation from
3519 : * one geographic or projected coordinate system to another.
3520 : *
3521 : * Internally the OGRCoordinateTransformation object is used to implement
3522 : * the reprojection.
3523 : *
3524 : * @param hSrcSRS the coordinate system for the source coordinate system.
3525 : * @param hDstSRS the coordinate system for the destination coordinate
3526 : * system.
3527 : * @param papszOptions NULL-terminated list of options, or NULL. Currently
3528 : * supported options are:
3529 : * <ul>
3530 : * <li>AREA_OF_INTEREST=west_long,south_lat,east_long,north_lat: Values in
3531 : * degrees. longitudes in [-180,180], latitudes in [-90,90].</li>
3532 : * <li>COORDINATE_OPERATION=string: PROJ or WKT string representing a
3533 : * coordinate operation, overriding the default computed transformation.</li>
3534 : * <li>COORDINATE_EPOCH=decimal_year: Coordinate epoch, expressed as a
3535 : * decimal year. Useful for time-dependent coordinate operations.</li>
3536 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
3537 : * expressed as a decimal year. Useful for time-dependent coordinate
3538 : *operations.</li>
3539 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch
3540 : *of target CRS, expressed as a decimal year. Useful for time-dependent
3541 : *coordinate operations.</li>
3542 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
3543 : * operations are allowed. Defaults to YES.</li>
3544 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
3545 : * PROJ 9.x series), PROJ may use coordinate
3546 : * operations that are not the "best" if resources (typically grids) needed
3547 : * to use them are missing. It will then fallback to other coordinate operations
3548 : * that have a lesser accuracy, for example using Helmert transformations,
3549 : * or in the absence of such operations, to ones with potential very rough
3550 : * accuracy, using "ballpark" transformations
3551 : * (see https://proj.org/glossary.html).
3552 : * When calling this method with YES, PROJ will only consider the
3553 : * "best" operation, and error out (at Transform() time) if they cannot be
3554 : * used.
3555 : * This method may be used together with ALLOW_BALLPARK=NO to
3556 : * only allow best operations that have a known accuracy.
3557 : * Note that this method has no effect on PROJ versions before 9.2.
3558 : * The default value for this option can be also set with the
3559 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
3560 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
3561 : * </ul>
3562 : *
3563 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3564 : * system fails to initialize the reprojection.
3565 : *
3566 : * @since GDAL 3.0
3567 : **/
3568 :
3569 1202 : void *GDALCreateReprojectionTransformerEx(OGRSpatialReferenceH hSrcSRS,
3570 : OGRSpatialReferenceH hDstSRS,
3571 : const char *const *papszOptions)
3572 : {
3573 1202 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
3574 1202 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
3575 :
3576 : /* -------------------------------------------------------------------- */
3577 : /* Build the forward coordinate transformation. */
3578 : /* -------------------------------------------------------------------- */
3579 1202 : double dfWestLongitudeDeg = 0.0;
3580 1202 : double dfSouthLatitudeDeg = 0.0;
3581 1202 : double dfEastLongitudeDeg = 0.0;
3582 1202 : double dfNorthLatitudeDeg = 0.0;
3583 1202 : const char *pszBBOX = CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST");
3584 1202 : if (pszBBOX)
3585 : {
3586 1131 : char **papszTokens = CSLTokenizeString2(pszBBOX, ",", 0);
3587 1131 : if (CSLCount(papszTokens) == 4)
3588 : {
3589 1131 : dfWestLongitudeDeg = CPLAtof(papszTokens[0]);
3590 1131 : dfSouthLatitudeDeg = CPLAtof(papszTokens[1]);
3591 1131 : dfEastLongitudeDeg = CPLAtof(papszTokens[2]);
3592 1131 : dfNorthLatitudeDeg = CPLAtof(papszTokens[3]);
3593 : }
3594 1131 : CSLDestroy(papszTokens);
3595 : }
3596 1202 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
3597 :
3598 2404 : OGRCoordinateTransformationOptions optionsFwd;
3599 1202 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
3600 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
3601 : {
3602 1131 : optionsFwd.SetAreaOfInterest(dfWestLongitudeDeg, dfSouthLatitudeDeg,
3603 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
3604 : }
3605 1202 : if (pszCO)
3606 : {
3607 7 : optionsFwd.SetCoordinateOperation(pszCO, false);
3608 : }
3609 :
3610 1202 : const char *pszCENTER_LONG = CSLFetchNameValue(papszOptions, "CENTER_LONG");
3611 1202 : if (pszCENTER_LONG)
3612 : {
3613 827 : optionsFwd.SetSourceCenterLong(CPLAtof(pszCENTER_LONG));
3614 : }
3615 :
3616 1202 : optionsFwd.SetBallparkAllowed(CPLTestBool(
3617 : CSLFetchNameValueDef(papszOptions, "ALLOW_BALLPARK", "YES")));
3618 :
3619 : const char *pszOnlyBest =
3620 1202 : CSLFetchNameValueDef(papszOptions, "ONLY_BEST", "AUTO");
3621 1202 : if (!EQUAL(pszOnlyBest, "AUTO"))
3622 : {
3623 1 : optionsFwd.SetOnlyBest(CPLTestBool(pszOnlyBest));
3624 : }
3625 :
3626 : OGRCoordinateTransformation *poForwardTransform =
3627 1202 : OGRCreateCoordinateTransformation(poSrcSRS, poDstSRS, optionsFwd);
3628 :
3629 1202 : if (poForwardTransform == nullptr)
3630 : // OGRCreateCoordinateTransformation() will report errors on its own.
3631 6 : return nullptr;
3632 :
3633 1196 : poForwardTransform->SetEmitErrors(false);
3634 :
3635 : /* -------------------------------------------------------------------- */
3636 : /* Create a structure to hold the transform info, and also */
3637 : /* build reverse transform. We assume that if the forward */
3638 : /* transform can be created, then so can the reverse one. */
3639 : /* -------------------------------------------------------------------- */
3640 1196 : GDALReprojectionTransformInfo *psInfo = new GDALReprojectionTransformInfo();
3641 :
3642 1196 : psInfo->papszOptions = CSLDuplicate(papszOptions);
3643 1196 : psInfo->poForwardTransform = poForwardTransform;
3644 1196 : psInfo->dfTime = CPLAtof(CSLFetchNameValueDef(
3645 : papszOptions, "COORDINATE_EPOCH",
3646 : CSLFetchNameValueDef(
3647 : papszOptions, "DST_COORDINATE_EPOCH",
3648 : CSLFetchNameValueDef(papszOptions, "SRC_COORDINATE_EPOCH", "0"))));
3649 1196 : psInfo->poReverseTransform = poForwardTransform->GetInverse();
3650 :
3651 1196 : if (psInfo->poReverseTransform)
3652 1196 : psInfo->poReverseTransform->SetEmitErrors(false);
3653 :
3654 1196 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
3655 : strlen(GDAL_GTI2_SIGNATURE));
3656 1196 : psInfo->sTI.pszClassName = GDAL_REPROJECTION_TRANSFORMER_CLASS_NAME;
3657 1196 : psInfo->sTI.pfnTransform = GDALReprojectionTransform;
3658 1196 : psInfo->sTI.pfnCleanup = GDALDestroyReprojectionTransformer;
3659 1196 : psInfo->sTI.pfnSerialize = GDALSerializeReprojectionTransformer;
3660 :
3661 1196 : return psInfo;
3662 : }
3663 :
3664 : /************************************************************************/
3665 : /* GDALDestroyReprojectionTransformer() */
3666 : /************************************************************************/
3667 :
3668 : /**
3669 : * Destroy reprojection transformation.
3670 : *
3671 : * @param pTransformArg the transformation handle returned by
3672 : * GDALCreateReprojectionTransformer().
3673 : */
3674 :
3675 1196 : void GDALDestroyReprojectionTransformer(void *pTransformArg)
3676 :
3677 : {
3678 1196 : if (pTransformArg == nullptr)
3679 0 : return;
3680 :
3681 1196 : GDALReprojectionTransformInfo *psInfo =
3682 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3683 :
3684 1196 : if (psInfo->poForwardTransform)
3685 1196 : OGRCoordinateTransformation::DestroyCT(psInfo->poForwardTransform);
3686 :
3687 1196 : if (psInfo->poReverseTransform)
3688 1196 : OGRCoordinateTransformation::DestroyCT(psInfo->poReverseTransform);
3689 :
3690 1196 : CSLDestroy(psInfo->papszOptions);
3691 :
3692 1196 : delete psInfo;
3693 : }
3694 :
3695 : /************************************************************************/
3696 : /* GDALReprojectionTransform() */
3697 : /************************************************************************/
3698 :
3699 : /**
3700 : * Perform reprojection transformation.
3701 : *
3702 : * Actually performs the reprojection transformation described in
3703 : * GDALCreateReprojectionTransformer(). This function matches the
3704 : * GDALTransformerFunc() signature. Details of the arguments are described
3705 : * there.
3706 : */
3707 :
3708 1912020 : int GDALReprojectionTransform(void *pTransformArg, int bDstToSrc,
3709 : int nPointCount, double *padfX, double *padfY,
3710 : double *padfZ, int *panSuccess)
3711 :
3712 : {
3713 1912020 : GDALReprojectionTransformInfo *psInfo =
3714 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3715 : int bSuccess;
3716 :
3717 1912020 : std::vector<double> adfTime;
3718 1912020 : double *padfT = nullptr;
3719 1912020 : if (psInfo->dfTime != 0.0 && nPointCount > 0)
3720 : {
3721 1 : adfTime.resize(nPointCount, psInfo->dfTime);
3722 1 : padfT = &adfTime[0];
3723 : }
3724 :
3725 1912020 : if (bDstToSrc)
3726 : {
3727 1651010 : if (psInfo->poReverseTransform == nullptr)
3728 : {
3729 0 : CPLError(
3730 : CE_Failure, CPLE_AppDefined,
3731 : "Inverse coordinate transformation cannot be instantiated");
3732 0 : if (panSuccess)
3733 : {
3734 0 : for (int i = 0; i < nPointCount; i++)
3735 0 : panSuccess[i] = FALSE;
3736 : }
3737 0 : bSuccess = false;
3738 : }
3739 : else
3740 : {
3741 1651010 : bSuccess = psInfo->poReverseTransform->Transform(
3742 1651010 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3743 : }
3744 : }
3745 : else
3746 261014 : bSuccess = psInfo->poForwardTransform->Transform(
3747 261014 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3748 :
3749 3824040 : return bSuccess;
3750 : }
3751 :
3752 : /************************************************************************/
3753 : /* GDALSerializeReprojectionTransformer() */
3754 : /************************************************************************/
3755 :
3756 156 : static CPLXMLNode *GDALSerializeReprojectionTransformer(void *pTransformArg)
3757 :
3758 : {
3759 : CPLXMLNode *psTree;
3760 156 : GDALReprojectionTransformInfo *psInfo =
3761 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3762 :
3763 156 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ReprojectionTransformer");
3764 :
3765 : /* -------------------------------------------------------------------- */
3766 : /* Handle SourceCS. */
3767 : /* -------------------------------------------------------------------- */
3768 312 : const auto ExportToWkt = [](const OGRSpatialReference *poSRS)
3769 : {
3770 : // Try first in WKT1 for backward compat
3771 : {
3772 312 : char *pszWKT = nullptr;
3773 312 : const char *const apszOptions[] = {"FORMAT=WKT1", nullptr};
3774 312 : CPLErrorHandlerPusher oHandler(CPLQuietErrorHandler);
3775 312 : CPLErrorStateBackuper oBackuper;
3776 312 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3777 : {
3778 622 : std::string osRet(pszWKT);
3779 311 : CPLFree(pszWKT);
3780 311 : return osRet;
3781 : }
3782 1 : CPLFree(pszWKT);
3783 : }
3784 :
3785 1 : char *pszWKT = nullptr;
3786 1 : const char *const apszOptions[] = {"FORMAT=WKT2_2019", nullptr};
3787 1 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3788 : {
3789 2 : std::string osRet(pszWKT);
3790 1 : CPLFree(pszWKT);
3791 1 : return osRet;
3792 : }
3793 0 : CPLFree(pszWKT);
3794 0 : return std::string();
3795 : };
3796 :
3797 156 : auto poSRS = psInfo->poForwardTransform->GetSourceCS();
3798 156 : if (poSRS)
3799 : {
3800 312 : const auto osWKT = ExportToWkt(poSRS);
3801 156 : CPLCreateXMLElementAndValue(psTree, "SourceSRS", osWKT.c_str());
3802 : }
3803 :
3804 : /* -------------------------------------------------------------------- */
3805 : /* Handle DestinationCS. */
3806 : /* -------------------------------------------------------------------- */
3807 156 : poSRS = psInfo->poForwardTransform->GetTargetCS();
3808 156 : if (poSRS)
3809 : {
3810 312 : const auto osWKT = ExportToWkt(poSRS);
3811 156 : CPLCreateXMLElementAndValue(psTree, "TargetSRS", osWKT.c_str());
3812 : }
3813 :
3814 : /* -------------------------------------------------------------------- */
3815 : /* Serialize options. */
3816 : /* -------------------------------------------------------------------- */
3817 156 : if (psInfo->papszOptions)
3818 : {
3819 : CPLXMLNode *psOptions =
3820 142 : CPLCreateXMLNode(psTree, CXT_Element, "Options");
3821 358 : for (auto iter = psInfo->papszOptions; *iter != nullptr; ++iter)
3822 : {
3823 216 : char *pszKey = nullptr;
3824 216 : const char *pszValue = CPLParseNameValue(*iter, &pszKey);
3825 216 : if (pszKey && pszValue)
3826 : {
3827 : auto elt =
3828 216 : CPLCreateXMLElementAndValue(psOptions, "Option", pszValue);
3829 216 : CPLAddXMLAttributeAndValue(elt, "key", pszKey);
3830 : }
3831 216 : CPLFree(pszKey);
3832 : }
3833 : }
3834 :
3835 156 : return psTree;
3836 : }
3837 :
3838 : /************************************************************************/
3839 : /* GDALDeserializeReprojectionTransformer() */
3840 : /************************************************************************/
3841 :
3842 203 : static void *GDALDeserializeReprojectionTransformer(CPLXMLNode *psTree)
3843 :
3844 : {
3845 203 : const char *pszSourceSRS = CPLGetXMLValue(psTree, "SourceSRS", nullptr);
3846 203 : const char *pszTargetSRS = CPLGetXMLValue(psTree, "TargetSRS", nullptr);
3847 203 : char *pszSourceWKT = nullptr, *pszTargetWKT = nullptr;
3848 203 : void *pResult = nullptr;
3849 :
3850 406 : OGRSpatialReference oSrcSRS;
3851 406 : OGRSpatialReference oDstSRS;
3852 :
3853 203 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3854 203 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3855 203 : if (pszSourceSRS != nullptr)
3856 : {
3857 203 : oSrcSRS.SetFromUserInput(pszSourceSRS);
3858 : }
3859 :
3860 203 : if (pszTargetSRS != nullptr)
3861 : {
3862 203 : oDstSRS.SetFromUserInput(pszTargetSRS);
3863 : }
3864 :
3865 203 : CPLStringList aosList;
3866 203 : const CPLXMLNode *psOptions = CPLGetXMLNode(psTree, "Options");
3867 203 : if (psOptions)
3868 : {
3869 426 : for (auto iter = psOptions->psChild; iter; iter = iter->psNext)
3870 : {
3871 260 : if (iter->eType == CXT_Element &&
3872 260 : strcmp(iter->pszValue, "Option") == 0)
3873 : {
3874 260 : const char *pszKey = CPLGetXMLValue(iter, "key", nullptr);
3875 260 : const char *pszValue = CPLGetXMLValue(iter, nullptr, nullptr);
3876 260 : if (pszKey && pszValue)
3877 : {
3878 260 : aosList.SetNameValue(pszKey, pszValue);
3879 : }
3880 : }
3881 : }
3882 : }
3883 :
3884 203 : pResult = GDALCreateReprojectionTransformerEx(
3885 203 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS) : nullptr,
3886 203 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS) : nullptr,
3887 203 : aosList.List());
3888 :
3889 203 : CPLFree(pszSourceWKT);
3890 203 : CPLFree(pszTargetWKT);
3891 :
3892 406 : return pResult;
3893 : }
3894 :
3895 : /************************************************************************/
3896 : /* ==================================================================== */
3897 : /* Approximate transformer. */
3898 : /* ==================================================================== */
3899 : /************************************************************************/
3900 :
3901 : /************************************************************************/
3902 : /* GDALCreateSimilarApproxTransformer() */
3903 : /************************************************************************/
3904 :
3905 41 : static void *GDALCreateSimilarApproxTransformer(void *hTransformArg,
3906 : double dfSrcRatioX,
3907 : double dfSrcRatioY)
3908 : {
3909 41 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarApproxTransformer",
3910 : nullptr);
3911 :
3912 41 : GDALApproxTransformInfo *psInfo =
3913 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
3914 :
3915 41 : void *pBaseCBData = GDALCreateSimilarTransformer(psInfo->pBaseCBData,
3916 : dfSrcRatioX, dfSrcRatioY);
3917 41 : if (pBaseCBData == nullptr)
3918 : {
3919 0 : return nullptr;
3920 : }
3921 :
3922 : GDALApproxTransformInfo *psClonedInfo =
3923 41 : static_cast<GDALApproxTransformInfo *>(GDALCreateApproxTransformer2(
3924 : psInfo->pfnBaseTransformer, pBaseCBData, psInfo->dfMaxErrorForward,
3925 : psInfo->dfMaxErrorReverse));
3926 41 : psClonedInfo->bOwnSubtransformer = TRUE;
3927 :
3928 41 : return psClonedInfo;
3929 : }
3930 :
3931 : /************************************************************************/
3932 : /* GDALSerializeApproxTransformer() */
3933 : /************************************************************************/
3934 :
3935 58 : static CPLXMLNode *GDALSerializeApproxTransformer(void *pTransformArg)
3936 :
3937 : {
3938 : CPLXMLNode *psTree;
3939 58 : GDALApproxTransformInfo *psInfo =
3940 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
3941 :
3942 58 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ApproxTransformer");
3943 :
3944 : /* -------------------------------------------------------------------- */
3945 : /* Attach max error. */
3946 : /* -------------------------------------------------------------------- */
3947 58 : if (psInfo->dfMaxErrorForward == psInfo->dfMaxErrorReverse)
3948 : {
3949 56 : CPLCreateXMLElementAndValue(
3950 : psTree, "MaxError",
3951 112 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3952 : }
3953 : else
3954 : {
3955 2 : CPLCreateXMLElementAndValue(
3956 : psTree, "MaxErrorForward",
3957 4 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3958 2 : CPLCreateXMLElementAndValue(
3959 : psTree, "MaxErrorReverse",
3960 4 : CPLString().Printf("%g", psInfo->dfMaxErrorReverse));
3961 : }
3962 :
3963 : /* -------------------------------------------------------------------- */
3964 : /* Capture underlying transformer. */
3965 : /* -------------------------------------------------------------------- */
3966 : CPLXMLNode *psTransformerContainer =
3967 58 : CPLCreateXMLNode(psTree, CXT_Element, "BaseTransformer");
3968 :
3969 58 : CPLXMLNode *psTransformer = GDALSerializeTransformer(
3970 : psInfo->pfnBaseTransformer, psInfo->pBaseCBData);
3971 58 : if (psTransformer != nullptr)
3972 58 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3973 :
3974 58 : return psTree;
3975 : }
3976 :
3977 : /************************************************************************/
3978 : /* GDALCreateApproxTransformer() */
3979 : /************************************************************************/
3980 :
3981 : /**
3982 : * Create an approximating transformer.
3983 : *
3984 : * This function creates a context for an approximated transformer. Basically
3985 : * a high precision transformer is supplied as input and internally linear
3986 : * approximations are computed to generate results to within a defined
3987 : * precision.
3988 : *
3989 : * The approximation is actually done at the point where GDALApproxTransform()
3990 : * calls are made, and depend on the assumption that they are roughly linear.
3991 : * The first and last point passed in must be the extreme values and the
3992 : * intermediate values should describe a curve between the end points. The
3993 : * approximator transforms and centers using the approximate transformer, and
3994 : * then compares the true middle transformed value to a linear approximation
3995 : * based on the end points. If the error is within the supplied threshold then
3996 : * the end points are used to linearly approximate all the values otherwise the
3997 : * input points are split into two smaller sets, and the function is recursively
3998 : * called until a sufficiently small set of points is found that the linear
3999 : * approximation is OK, or that all the points are exactly computed.
4000 : *
4001 : * This function is very suitable for approximating transformation results
4002 : * from output pixel/line space to input coordinates for warpers that operate
4003 : * on one input scanline at a time. Care should be taken using it in other
4004 : * circumstances as little internal validation is done in order to keep things
4005 : * fast.
4006 : *
4007 : * @param pfnBaseTransformer the high precision transformer which should be
4008 : * approximated.
4009 : * @param pBaseTransformArg the callback argument for the high precision
4010 : * transformer.
4011 : * @param dfMaxError the maximum cartesian error in the "output" space that
4012 : * is to be accepted in the linear approximation, evaluated as a Manhattan
4013 : * distance.
4014 : *
4015 : * @return callback pointer suitable for use with GDALApproxTransform(). It
4016 : * should be deallocated with GDALDestroyApproxTransformer().
4017 : */
4018 :
4019 1240 : void *GDALCreateApproxTransformer(GDALTransformerFunc pfnBaseTransformer,
4020 : void *pBaseTransformArg, double dfMaxError)
4021 :
4022 : {
4023 1240 : return GDALCreateApproxTransformer2(pfnBaseTransformer, pBaseTransformArg,
4024 1240 : dfMaxError, dfMaxError);
4025 : }
4026 :
4027 : static void *
4028 1434 : GDALCreateApproxTransformer2(GDALTransformerFunc pfnBaseTransformer,
4029 : void *pBaseTransformArg, double dfMaxErrorForward,
4030 : double dfMaxErrorReverse)
4031 :
4032 : {
4033 1434 : GDALApproxTransformInfo *psATInfo = new GDALApproxTransformInfo;
4034 1434 : psATInfo->pfnBaseTransformer = pfnBaseTransformer;
4035 1434 : psATInfo->pBaseCBData = pBaseTransformArg;
4036 1434 : psATInfo->dfMaxErrorForward = dfMaxErrorForward;
4037 1434 : psATInfo->dfMaxErrorReverse = dfMaxErrorReverse;
4038 1434 : psATInfo->bOwnSubtransformer = FALSE;
4039 :
4040 1434 : memcpy(psATInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
4041 : strlen(GDAL_GTI2_SIGNATURE));
4042 1434 : psATInfo->sTI.pszClassName = GDAL_APPROX_TRANSFORMER_CLASS_NAME;
4043 1434 : psATInfo->sTI.pfnTransform = GDALApproxTransform;
4044 1434 : psATInfo->sTI.pfnCleanup = GDALDestroyApproxTransformer;
4045 1434 : psATInfo->sTI.pfnSerialize = GDALSerializeApproxTransformer;
4046 1434 : psATInfo->sTI.pfnCreateSimilar = GDALCreateSimilarApproxTransformer;
4047 :
4048 1434 : return psATInfo;
4049 : }
4050 :
4051 : /************************************************************************/
4052 : /* GDALApproxTransformerOwnsSubtransformer() */
4053 : /************************************************************************/
4054 :
4055 : /** Set bOwnSubtransformer flag */
4056 1390 : void GDALApproxTransformerOwnsSubtransformer(void *pCBData, int bOwnFlag)
4057 :
4058 : {
4059 1390 : GDALApproxTransformInfo *psATInfo =
4060 : static_cast<GDALApproxTransformInfo *>(pCBData);
4061 :
4062 1390 : psATInfo->bOwnSubtransformer = bOwnFlag;
4063 1390 : }
4064 :
4065 : /************************************************************************/
4066 : /* GDALDestroyApproxTransformer() */
4067 : /************************************************************************/
4068 :
4069 : /**
4070 : * Cleanup approximate transformer.
4071 : *
4072 : * Deallocates the resources allocated by GDALCreateApproxTransformer().
4073 : *
4074 : * @param pCBData callback data originally returned by
4075 : * GDALCreateApproxTransformer().
4076 : */
4077 :
4078 1434 : void GDALDestroyApproxTransformer(void *pCBData)
4079 :
4080 : {
4081 1434 : if (pCBData == nullptr)
4082 0 : return;
4083 :
4084 1434 : GDALApproxTransformInfo *psATInfo =
4085 : static_cast<GDALApproxTransformInfo *>(pCBData);
4086 :
4087 1434 : if (psATInfo->bOwnSubtransformer)
4088 1431 : GDALDestroyTransformer(psATInfo->pBaseCBData);
4089 :
4090 1434 : delete psATInfo;
4091 : }
4092 :
4093 : /************************************************************************/
4094 : /* GDALRefreshApproxTransformer() */
4095 : /************************************************************************/
4096 :
4097 44 : void GDALRefreshApproxTransformer(void *hTransformArg)
4098 : {
4099 44 : GDALApproxTransformInfo *psInfo =
4100 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4101 :
4102 44 : if (GDALIsTransformer(psInfo->pBaseCBData,
4103 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4104 : {
4105 44 : GDALRefreshGenImgProjTransformer(psInfo->pBaseCBData);
4106 : }
4107 44 : }
4108 :
4109 : /************************************************************************/
4110 : /* GDALApproxTransformInternal() */
4111 : /************************************************************************/
4112 :
4113 1308560 : static int GDALApproxTransformInternal(void *pCBData, int bDstToSrc,
4114 : int nPoints, double *x, double *y,
4115 : double *z, int *panSuccess,
4116 : // SME = Start, Middle, End.
4117 : const double xSMETransformed[3],
4118 : const double ySMETransformed[3],
4119 : const double zSMETransformed[3])
4120 : {
4121 1308560 : GDALApproxTransformInfo *psATInfo =
4122 : static_cast<GDALApproxTransformInfo *>(pCBData);
4123 1308560 : const int nMiddle = (nPoints - 1) / 2;
4124 :
4125 : #ifdef notdef_sanify_check
4126 : {
4127 : double x2[3] = {x[0], x[nMiddle], x[nPoints - 1]};
4128 : double y2[3] = {y[0], y[nMiddle], y[nPoints - 1]};
4129 : double z2[3] = {z[0], z[nMiddle], z[nPoints - 1]};
4130 : int anSuccess2[3] = {};
4131 :
4132 : const int bSuccess = psATInfo->pfnBaseTransformer(
4133 : psATInfo->pBaseCBData, bDstToSrc, 3, x2, y2, z2, anSuccess2);
4134 : CPLAssert(bSuccess);
4135 : CPLAssert(anSuccess2[0]);
4136 : CPLAssert(anSuccess2[1]);
4137 : CPLAssert(anSuccess2[2]);
4138 : CPLAssert(x2[0] == xSMETransformed[0]);
4139 : CPLAssert(y2[0] == ySMETransformed[0]);
4140 : CPLAssert(z2[0] == zSMETransformed[0]);
4141 : CPLAssert(x2[1] == xSMETransformed[1]);
4142 : CPLAssert(y2[1] == ySMETransformed[1]);
4143 : CPLAssert(z2[1] == zSMETransformed[1]);
4144 : CPLAssert(x2[2] == xSMETransformed[2]);
4145 : CPLAssert(y2[2] == ySMETransformed[2]);
4146 : CPLAssert(z2[2] == zSMETransformed[2]);
4147 : }
4148 : #endif
4149 :
4150 : #ifdef DEBUG_APPROX_TRANSFORMER
4151 : fprintf(stderr, "start (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4152 : x[0], y[0], xSMETransformed[0], ySMETransformed[0]);
4153 : fprintf(stderr, "middle (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4154 : x[nMiddle], y[nMiddle], xSMETransformed[1], ySMETransformed[1]);
4155 : fprintf(stderr, "end (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4156 : x[nPoints - 1], y[nPoints - 1], xSMETransformed[2],
4157 : ySMETransformed[2]);
4158 : #endif
4159 :
4160 : /* -------------------------------------------------------------------- */
4161 : /* Is the error at the middle acceptable relative to an */
4162 : /* interpolation of the middle position? */
4163 : /* -------------------------------------------------------------------- */
4164 1308560 : const double dfDeltaX =
4165 1308560 : (xSMETransformed[2] - xSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4166 1308560 : const double dfDeltaY =
4167 1308560 : (ySMETransformed[2] - ySMETransformed[0]) / (x[nPoints - 1] - x[0]);
4168 1308560 : const double dfDeltaZ =
4169 1308560 : (zSMETransformed[2] - zSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4170 :
4171 1308560 : const double dfError =
4172 1308560 : fabs((xSMETransformed[0] + dfDeltaX * (x[nMiddle] - x[0])) -
4173 1308560 : xSMETransformed[1]) +
4174 1308560 : fabs((ySMETransformed[0] + dfDeltaY * (x[nMiddle] - x[0])) -
4175 1308560 : ySMETransformed[1]);
4176 :
4177 1308560 : const double dfMaxError =
4178 1308560 : (bDstToSrc) ? psATInfo->dfMaxErrorReverse : psATInfo->dfMaxErrorForward;
4179 1308560 : if (dfError > dfMaxError)
4180 : {
4181 : #if DEBUG_VERBOSE
4182 : CPLDebug("GDAL",
4183 : "ApproxTransformer - "
4184 : "error %g over threshold %g, subdivide %d points.",
4185 : dfError, dfMaxError, nPoints);
4186 : #endif
4187 :
4188 596551 : double xMiddle[3] = {x[(nMiddle - 1) / 2], x[nMiddle - 1],
4189 596551 : x[nMiddle + (nPoints - nMiddle - 1) / 2]};
4190 596551 : double yMiddle[3] = {y[(nMiddle - 1) / 2], y[nMiddle - 1],
4191 596551 : y[nMiddle + (nPoints - nMiddle - 1) / 2]};
4192 596551 : double zMiddle[3] = {z[(nMiddle - 1) / 2], z[nMiddle - 1],
4193 596551 : z[nMiddle + (nPoints - nMiddle - 1) / 2]};
4194 :
4195 596551 : const bool bUseBaseTransformForHalf1 =
4196 467704 : nMiddle <= 5 || y[0] != y[nMiddle - 1] ||
4197 1531960 : y[0] != y[(nMiddle - 1) / 2] || x[0] == x[nMiddle - 1] ||
4198 467704 : x[0] == x[(nMiddle - 1) / 2];
4199 596551 : const bool bUseBaseTransformForHalf2 =
4200 481855 : nPoints - nMiddle <= 5 || y[nMiddle] != y[nPoints - 1] ||
4201 481855 : y[nMiddle] != y[nMiddle + (nPoints - nMiddle - 1) / 2] ||
4202 1560260 : x[nMiddle] == x[nPoints - 1] ||
4203 481855 : x[nMiddle] == x[nMiddle + (nPoints - nMiddle - 1) / 2];
4204 :
4205 596551 : int anSuccess2[3] = {};
4206 596551 : int bSuccess = FALSE;
4207 596551 : if (!bUseBaseTransformForHalf1 && !bUseBaseTransformForHalf2)
4208 467704 : bSuccess = psATInfo->pfnBaseTransformer(
4209 : psATInfo->pBaseCBData, bDstToSrc, 3, xMiddle, yMiddle, zMiddle,
4210 : anSuccess2);
4211 128847 : else if (!bUseBaseTransformForHalf1)
4212 : {
4213 0 : bSuccess = psATInfo->pfnBaseTransformer(
4214 : psATInfo->pBaseCBData, bDstToSrc, 2, xMiddle, yMiddle, zMiddle,
4215 : anSuccess2);
4216 0 : anSuccess2[2] = TRUE;
4217 : }
4218 128847 : else if (!bUseBaseTransformForHalf2)
4219 : {
4220 14151 : bSuccess = psATInfo->pfnBaseTransformer(
4221 : psATInfo->pBaseCBData, bDstToSrc, 1, xMiddle + 2, yMiddle + 2,
4222 : zMiddle + 2, anSuccess2 + 2);
4223 14151 : anSuccess2[0] = TRUE;
4224 14151 : anSuccess2[1] = TRUE;
4225 : }
4226 :
4227 596551 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4228 : {
4229 114712 : bSuccess = psATInfo->pfnBaseTransformer(
4230 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4231 : z + 1, panSuccess + 1);
4232 229424 : bSuccess &= psATInfo->pfnBaseTransformer(
4233 114712 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4234 114712 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4235 114712 : panSuccess + nMiddle + 1);
4236 :
4237 114712 : x[0] = xSMETransformed[0];
4238 114712 : y[0] = ySMETransformed[0];
4239 114712 : z[0] = zSMETransformed[0];
4240 114712 : panSuccess[0] = TRUE;
4241 114712 : x[nMiddle] = xSMETransformed[1];
4242 114712 : y[nMiddle] = ySMETransformed[1];
4243 114712 : z[nMiddle] = zSMETransformed[1];
4244 114712 : panSuccess[nMiddle] = TRUE;
4245 114712 : x[nPoints - 1] = xSMETransformed[2];
4246 114712 : y[nPoints - 1] = ySMETransformed[2];
4247 114712 : z[nPoints - 1] = zSMETransformed[2];
4248 114712 : panSuccess[nPoints - 1] = TRUE;
4249 114712 : return bSuccess;
4250 : }
4251 :
4252 481839 : double x2[3] = {};
4253 481839 : double y2[3] = {};
4254 481839 : double z2[3] = {};
4255 481839 : if (!bUseBaseTransformForHalf1)
4256 : {
4257 467688 : x2[0] = xSMETransformed[0];
4258 467688 : y2[0] = ySMETransformed[0];
4259 467688 : z2[0] = zSMETransformed[0];
4260 467688 : x2[1] = xMiddle[0];
4261 467688 : y2[1] = yMiddle[0];
4262 467688 : z2[1] = zMiddle[0];
4263 467688 : x2[2] = xMiddle[1];
4264 467688 : y2[2] = yMiddle[1];
4265 467688 : z2[2] = zMiddle[1];
4266 :
4267 467688 : bSuccess = GDALApproxTransformInternal(
4268 : psATInfo, bDstToSrc, nMiddle, x, y, z, panSuccess, x2, y2, z2);
4269 : }
4270 : else
4271 : {
4272 14151 : bSuccess = psATInfo->pfnBaseTransformer(
4273 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4274 : z + 1, panSuccess + 1);
4275 14151 : x[0] = xSMETransformed[0];
4276 14151 : y[0] = ySMETransformed[0];
4277 14151 : z[0] = zSMETransformed[0];
4278 14151 : panSuccess[0] = TRUE;
4279 : }
4280 :
4281 481839 : if (!bSuccess)
4282 24 : return FALSE;
4283 :
4284 481815 : if (!bUseBaseTransformForHalf2)
4285 : {
4286 481815 : x2[0] = xSMETransformed[1];
4287 481815 : y2[0] = ySMETransformed[1];
4288 481815 : z2[0] = zSMETransformed[1];
4289 481815 : x2[1] = xMiddle[2];
4290 481815 : y2[1] = yMiddle[2];
4291 481815 : z2[1] = zMiddle[2];
4292 481815 : x2[2] = xSMETransformed[2];
4293 481815 : y2[2] = ySMETransformed[2];
4294 481815 : z2[2] = zSMETransformed[2];
4295 :
4296 481815 : bSuccess = GDALApproxTransformInternal(
4297 481815 : psATInfo, bDstToSrc, nPoints - nMiddle, x + nMiddle,
4298 481815 : y + nMiddle, z + nMiddle, panSuccess + nMiddle, x2, y2, z2);
4299 : }
4300 : else
4301 : {
4302 0 : bSuccess = psATInfo->pfnBaseTransformer(
4303 0 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4304 0 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4305 0 : panSuccess + nMiddle + 1);
4306 :
4307 0 : x[nMiddle] = xSMETransformed[1];
4308 0 : y[nMiddle] = ySMETransformed[1];
4309 0 : z[nMiddle] = zSMETransformed[1];
4310 0 : panSuccess[nMiddle] = TRUE;
4311 0 : x[nPoints - 1] = xSMETransformed[2];
4312 0 : y[nPoints - 1] = ySMETransformed[2];
4313 0 : z[nPoints - 1] = zSMETransformed[2];
4314 0 : panSuccess[nPoints - 1] = TRUE;
4315 : }
4316 :
4317 481815 : if (!bSuccess)
4318 2 : return FALSE;
4319 :
4320 481813 : return TRUE;
4321 : }
4322 :
4323 : /* -------------------------------------------------------------------- */
4324 : /* Error is OK since this is just used to compute output bounds */
4325 : /* of newly created file for gdalwarper. So just use affine */
4326 : /* approximation of the reverse transform. Eventually we */
4327 : /* should implement iterative searching to find a result within */
4328 : /* our error threshold. */
4329 : /* NOTE: the above comment is not true: gdalwarp uses approximator */
4330 : /* also to compute the source pixel of each target pixel. */
4331 : /* -------------------------------------------------------------------- */
4332 148997000 : for (int i = nPoints - 1; i >= 0; i--)
4333 : {
4334 : #ifdef check_error
4335 : double xtemp = x[i];
4336 : double ytemp = y[i];
4337 : double ztemp = z[i];
4338 : double x_ori = xtemp;
4339 : double y_ori = ytemp;
4340 : int btemp = FALSE;
4341 : psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 1,
4342 : &xtemp, &ytemp, &ztemp, &btemp);
4343 : #endif
4344 148285000 : const double dfDist = (x[i] - x[0]);
4345 148285000 : x[i] = xSMETransformed[0] + dfDeltaX * dfDist;
4346 148285000 : y[i] = ySMETransformed[0] + dfDeltaY * dfDist;
4347 148285000 : z[i] = zSMETransformed[0] + dfDeltaZ * dfDist;
4348 : #ifdef check_error
4349 : const double dfError2 = fabs(x[i] - xtemp) + fabs(y[i] - ytemp);
4350 : if (dfError2 > 4 /*10 * dfMaxError*/)
4351 : {
4352 : /*ok*/ printf("Error = %f on (%f, %f)\n", dfError2, x_ori, y_ori);
4353 : }
4354 : #endif
4355 148285000 : panSuccess[i] = TRUE;
4356 : }
4357 :
4358 712007 : return TRUE;
4359 : }
4360 :
4361 : /************************************************************************/
4362 : /* GDALApproxTransform() */
4363 : /************************************************************************/
4364 :
4365 : /**
4366 : * Perform approximate transformation.
4367 : *
4368 : * Actually performs the approximate transformation described in
4369 : * GDALCreateApproxTransformer(). This function matches the
4370 : * GDALTransformerFunc() signature. Details of the arguments are described
4371 : * there.
4372 : */
4373 :
4374 786706 : int GDALApproxTransform(void *pCBData, int bDstToSrc, int nPoints, double *x,
4375 : double *y, double *z, int *panSuccess)
4376 :
4377 : {
4378 786706 : GDALApproxTransformInfo *psATInfo =
4379 : static_cast<GDALApproxTransformInfo *>(pCBData);
4380 786706 : double x2[3] = {};
4381 786706 : double y2[3] = {};
4382 786706 : double z2[3] = {};
4383 786706 : int anSuccess2[3] = {};
4384 : int bSuccess;
4385 :
4386 786706 : const int nMiddle = (nPoints - 1) / 2;
4387 :
4388 : /* -------------------------------------------------------------------- */
4389 : /* Bail if our preconditions are not met, or if error is not */
4390 : /* acceptable. */
4391 : /* -------------------------------------------------------------------- */
4392 786706 : int bRet = FALSE;
4393 786706 : if (y[0] != y[nPoints - 1] || y[0] != y[nMiddle] ||
4394 774204 : x[0] == x[nPoints - 1] || x[0] == x[nMiddle] ||
4395 365237 : (psATInfo->dfMaxErrorForward == 0.0 &&
4396 365237 : psATInfo->dfMaxErrorReverse == 0.0) ||
4397 : nPoints <= 5)
4398 : {
4399 422235 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4400 : nPoints, x, y, z, panSuccess);
4401 422235 : goto end;
4402 : }
4403 :
4404 : /* -------------------------------------------------------------------- */
4405 : /* Transform first, last and middle point. */
4406 : /* -------------------------------------------------------------------- */
4407 364471 : x2[0] = x[0];
4408 364471 : y2[0] = y[0];
4409 364471 : z2[0] = z[0];
4410 364471 : x2[1] = x[nMiddle];
4411 364471 : y2[1] = y[nMiddle];
4412 364471 : z2[1] = z[nMiddle];
4413 364471 : x2[2] = x[nPoints - 1];
4414 364471 : y2[2] = y[nPoints - 1];
4415 364471 : z2[2] = z[nPoints - 1];
4416 :
4417 364471 : bSuccess = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 3,
4418 : x2, y2, z2, anSuccess2);
4419 364471 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4420 : {
4421 5416 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4422 : nPoints, x, y, z, panSuccess);
4423 5416 : goto end;
4424 : }
4425 :
4426 359055 : bRet = GDALApproxTransformInternal(pCBData, bDstToSrc, nPoints, x, y, z,
4427 : panSuccess, x2, y2, z2);
4428 :
4429 786706 : end:
4430 : #ifdef DEBUG_APPROX_TRANSFORMER
4431 : for (int i = 0; i < nPoints; i++)
4432 : fprintf(stderr, "[%d] (%.10f,%.10f) %d\n", /*ok*/
4433 : i, x[i], y[i], panSuccess[i]);
4434 : #endif
4435 :
4436 786706 : return bRet;
4437 : }
4438 :
4439 : /************************************************************************/
4440 : /* GDALDeserializeApproxTransformer() */
4441 : /************************************************************************/
4442 :
4443 151 : static void *GDALDeserializeApproxTransformer(CPLXMLNode *psTree)
4444 :
4445 : {
4446 151 : double dfMaxErrorForward = 0.25;
4447 151 : double dfMaxErrorReverse = 0.25;
4448 151 : const char *pszMaxError = CPLGetXMLValue(psTree, "MaxError", nullptr);
4449 151 : if (pszMaxError != nullptr)
4450 : {
4451 149 : dfMaxErrorForward = CPLAtof(pszMaxError);
4452 149 : dfMaxErrorReverse = dfMaxErrorForward;
4453 : }
4454 : const char *pszMaxErrorForward =
4455 151 : CPLGetXMLValue(psTree, "MaxErrorForward", nullptr);
4456 151 : if (pszMaxErrorForward != nullptr)
4457 : {
4458 2 : dfMaxErrorForward = CPLAtof(pszMaxErrorForward);
4459 : }
4460 : const char *pszMaxErrorReverse =
4461 151 : CPLGetXMLValue(psTree, "MaxErrorReverse", nullptr);
4462 151 : if (pszMaxErrorReverse != nullptr)
4463 : {
4464 2 : dfMaxErrorReverse = CPLAtof(pszMaxErrorReverse);
4465 : }
4466 :
4467 151 : GDALTransformerFunc pfnBaseTransform = nullptr;
4468 151 : void *pBaseCBData = nullptr;
4469 :
4470 151 : CPLXMLNode *psContainer = CPLGetXMLNode(psTree, "BaseTransformer");
4471 :
4472 151 : if (psContainer != nullptr && psContainer->psChild != nullptr)
4473 : {
4474 151 : GDALDeserializeTransformer(psContainer->psChild, &pfnBaseTransform,
4475 : &pBaseCBData);
4476 : }
4477 :
4478 151 : if (pfnBaseTransform == nullptr)
4479 : {
4480 0 : CPLError(CE_Failure, CPLE_AppDefined,
4481 : "Cannot get base transform for approx transformer.");
4482 0 : return nullptr;
4483 : }
4484 :
4485 151 : void *pApproxCBData = GDALCreateApproxTransformer2(
4486 : pfnBaseTransform, pBaseCBData, dfMaxErrorForward, dfMaxErrorReverse);
4487 151 : GDALApproxTransformerOwnsSubtransformer(pApproxCBData, TRUE);
4488 :
4489 151 : return pApproxCBData;
4490 : }
4491 :
4492 : /************************************************************************/
4493 : /* GDALTransformLonLatToDestApproxTransformer() */
4494 : /************************************************************************/
4495 :
4496 2832 : int GDALTransformLonLatToDestApproxTransformer(void *hTransformArg,
4497 : double *pdfX, double *pdfY)
4498 : {
4499 2832 : GDALApproxTransformInfo *psInfo =
4500 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4501 :
4502 2832 : if (GDALIsTransformer(psInfo->pBaseCBData,
4503 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4504 : {
4505 2832 : return GDALTransformLonLatToDestGenImgProjTransformer(
4506 2832 : psInfo->pBaseCBData, pdfX, pdfY);
4507 : }
4508 0 : return false;
4509 : }
4510 :
4511 : /************************************************************************/
4512 : /* GDALApplyGeoTransform() */
4513 : /************************************************************************/
4514 :
4515 : /**
4516 : * Apply GeoTransform to x/y coordinate.
4517 : *
4518 : * Applies the following computation, converting a (pixel, line) coordinate
4519 : * into a georeferenced (geo_x, geo_y) location.
4520 : * \code{.c}
4521 : * *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1]
4522 : * + dfLine * padfGeoTransform[2];
4523 : * *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4]
4524 : * + dfLine * padfGeoTransform[5];
4525 : * \endcode
4526 : *
4527 : * @param padfGeoTransform Six coefficient GeoTransform to apply.
4528 : * @param dfPixel Input pixel position.
4529 : * @param dfLine Input line position.
4530 : * @param pdfGeoX output location where geo_x (easting/longitude)
4531 : * location is placed.
4532 : * @param pdfGeoY output location where geo_y (northing/latitude)
4533 : * location is placed.
4534 : */
4535 :
4536 420071 : void CPL_STDCALL GDALApplyGeoTransform(const double *padfGeoTransform,
4537 : double dfPixel, double dfLine,
4538 : double *pdfGeoX, double *pdfGeoY)
4539 : {
4540 420071 : *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1] +
4541 420071 : dfLine * padfGeoTransform[2];
4542 420071 : *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4] +
4543 420071 : dfLine * padfGeoTransform[5];
4544 420071 : }
4545 :
4546 : /************************************************************************/
4547 : /* GDALInvGeoTransform() */
4548 : /************************************************************************/
4549 :
4550 : /**
4551 : * Invert Geotransform.
4552 : *
4553 : * This function will invert a standard 3x2 set of GeoTransform coefficients.
4554 : * This converts the equation from being pixel to geo to being geo to pixel.
4555 : *
4556 : * @param gt_in Input geotransform (six doubles - unaltered).
4557 : * @param gt_out Output geotransform (six doubles - updated).
4558 : *
4559 : * @return TRUE on success or FALSE if the equation is uninvertable.
4560 : */
4561 :
4562 3989 : int CPL_STDCALL GDALInvGeoTransform(const double *gt_in, double *gt_out)
4563 :
4564 : {
4565 : // Special case - no rotation - to avoid computing determinate
4566 : // and potential precision issues.
4567 3989 : if (gt_in[2] == 0.0 && gt_in[4] == 0.0 && gt_in[1] != 0.0 &&
4568 3931 : gt_in[5] != 0.0)
4569 : {
4570 : /*X = gt_in[0] + x * gt_in[1]
4571 : Y = gt_in[3] + y * gt_in[5]
4572 : -->
4573 : x = -gt_in[0] / gt_in[1] + (1 / gt_in[1]) * X
4574 : y = -gt_in[3] / gt_in[5] + (1 / gt_in[5]) * Y
4575 : */
4576 3931 : gt_out[0] = -gt_in[0] / gt_in[1];
4577 3931 : gt_out[1] = 1.0 / gt_in[1];
4578 3931 : gt_out[2] = 0.0;
4579 3931 : gt_out[3] = -gt_in[3] / gt_in[5];
4580 3931 : gt_out[4] = 0.0;
4581 3931 : gt_out[5] = 1.0 / gt_in[5];
4582 3931 : return 1;
4583 : }
4584 :
4585 : // Assume a 3rd row that is [1 0 0].
4586 :
4587 : // Compute determinate.
4588 :
4589 58 : const double det = gt_in[1] * gt_in[5] - gt_in[2] * gt_in[4];
4590 116 : const double magnitude = std::max(std::max(fabs(gt_in[1]), fabs(gt_in[2])),
4591 58 : std::max(fabs(gt_in[4]), fabs(gt_in[5])));
4592 :
4593 58 : if (fabs(det) <= 1e-10 * magnitude * magnitude)
4594 9 : return 0;
4595 :
4596 49 : const double inv_det = 1.0 / det;
4597 :
4598 : // Compute adjoint, and divide by determinate.
4599 :
4600 49 : gt_out[1] = gt_in[5] * inv_det;
4601 49 : gt_out[4] = -gt_in[4] * inv_det;
4602 :
4603 49 : gt_out[2] = -gt_in[2] * inv_det;
4604 49 : gt_out[5] = gt_in[1] * inv_det;
4605 :
4606 49 : gt_out[0] = (gt_in[2] * gt_in[3] - gt_in[0] * gt_in[5]) * inv_det;
4607 49 : gt_out[3] = (-gt_in[1] * gt_in[3] + gt_in[0] * gt_in[4]) * inv_det;
4608 :
4609 49 : return 1;
4610 : }
4611 :
4612 : /************************************************************************/
4613 : /* GDALSerializeTransformer() */
4614 : /************************************************************************/
4615 :
4616 270 : CPLXMLNode *GDALSerializeTransformer(GDALTransformerFunc /* pfnFunc */,
4617 : void *pTransformArg)
4618 : {
4619 270 : VALIDATE_POINTER1(pTransformArg, "GDALSerializeTransformer", nullptr);
4620 :
4621 270 : GDALTransformerInfo *psInfo =
4622 : static_cast<GDALTransformerInfo *>(pTransformArg);
4623 :
4624 270 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4625 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4626 : {
4627 0 : CPLError(CE_Failure, CPLE_AppDefined,
4628 : "Attempt to serialize non-GTI2 transformer.");
4629 0 : return nullptr;
4630 : }
4631 270 : else if (psInfo->pfnSerialize == nullptr)
4632 : {
4633 0 : CPLError(CE_Failure, CPLE_AppDefined,
4634 : "No serialization function available for this transformer.");
4635 0 : return nullptr;
4636 : }
4637 :
4638 270 : return psInfo->pfnSerialize(pTransformArg);
4639 : }
4640 :
4641 : /************************************************************************/
4642 : /* GDALRegisterTransformDeserializer() */
4643 : /************************************************************************/
4644 :
4645 : static CPLList *psListDeserializer = nullptr;
4646 : static CPLMutex *hDeserializerMutex = nullptr;
4647 :
4648 : typedef struct
4649 : {
4650 : char *pszTransformName;
4651 : GDALTransformerFunc pfnTransformerFunc;
4652 : GDALTransformDeserializeFunc pfnDeserializeFunc;
4653 : } TransformDeserializerInfo;
4654 :
4655 0 : void *GDALRegisterTransformDeserializer(
4656 : const char *pszTransformName, GDALTransformerFunc pfnTransformerFunc,
4657 : GDALTransformDeserializeFunc pfnDeserializeFunc)
4658 : {
4659 : TransformDeserializerInfo *psInfo =
4660 : static_cast<TransformDeserializerInfo *>(
4661 0 : CPLMalloc(sizeof(TransformDeserializerInfo)));
4662 0 : psInfo->pszTransformName = CPLStrdup(pszTransformName);
4663 0 : psInfo->pfnTransformerFunc = pfnTransformerFunc;
4664 0 : psInfo->pfnDeserializeFunc = pfnDeserializeFunc;
4665 :
4666 0 : CPLMutexHolderD(&hDeserializerMutex);
4667 0 : psListDeserializer = CPLListInsert(psListDeserializer, psInfo, 0);
4668 :
4669 0 : return psInfo;
4670 : }
4671 :
4672 : /************************************************************************/
4673 : /* GDALUnregisterTransformDeserializer() */
4674 : /************************************************************************/
4675 :
4676 0 : void GDALUnregisterTransformDeserializer(void *pData)
4677 : {
4678 0 : CPLMutexHolderD(&hDeserializerMutex);
4679 0 : CPLList *psList = psListDeserializer;
4680 0 : CPLList *psLast = nullptr;
4681 0 : while (psList)
4682 : {
4683 0 : if (psList->pData == pData)
4684 : {
4685 0 : TransformDeserializerInfo *psInfo =
4686 : static_cast<TransformDeserializerInfo *>(pData);
4687 0 : CPLFree(psInfo->pszTransformName);
4688 0 : CPLFree(pData);
4689 0 : if (psLast)
4690 0 : psLast->psNext = psList->psNext;
4691 : else
4692 0 : psListDeserializer = nullptr;
4693 0 : CPLFree(psList);
4694 0 : break;
4695 : }
4696 0 : psLast = psList;
4697 0 : psList = psList->psNext;
4698 : }
4699 0 : }
4700 :
4701 : /************************************************************************/
4702 : /* GDALUnregisterTransformDeserializer() */
4703 : /************************************************************************/
4704 :
4705 1126 : void GDALCleanupTransformDeserializerMutex()
4706 : {
4707 1126 : if (hDeserializerMutex != nullptr)
4708 : {
4709 0 : CPLDestroyMutex(hDeserializerMutex);
4710 0 : hDeserializerMutex = nullptr;
4711 : }
4712 1126 : }
4713 :
4714 : /************************************************************************/
4715 : /* GDALDeserializeTransformer() */
4716 : /************************************************************************/
4717 :
4718 569 : CPLErr GDALDeserializeTransformer(CPLXMLNode *psTree,
4719 : GDALTransformerFunc *ppfnFunc,
4720 : void **ppTransformArg)
4721 :
4722 : {
4723 569 : *ppfnFunc = nullptr;
4724 569 : *ppTransformArg = nullptr;
4725 :
4726 569 : CPLErrorReset();
4727 :
4728 569 : if (psTree == nullptr || psTree->eType != CXT_Element)
4729 0 : CPLError(CE_Failure, CPLE_AppDefined,
4730 : "Malformed element in GDALDeserializeTransformer");
4731 569 : else if (EQUAL(psTree->pszValue, "GenImgProjTransformer"))
4732 : {
4733 199 : *ppfnFunc = GDALGenImgProjTransform;
4734 199 : *ppTransformArg = GDALDeserializeGenImgProjTransformer(psTree);
4735 : }
4736 370 : else if (EQUAL(psTree->pszValue, "ReprojectionTransformer"))
4737 : {
4738 203 : *ppfnFunc = GDALReprojectionTransform;
4739 203 : *ppTransformArg = GDALDeserializeReprojectionTransformer(psTree);
4740 : }
4741 167 : else if (EQUAL(psTree->pszValue, "GCPTransformer"))
4742 : {
4743 5 : *ppfnFunc = GDALGCPTransform;
4744 5 : *ppTransformArg = GDALDeserializeGCPTransformer(psTree);
4745 : }
4746 162 : else if (EQUAL(psTree->pszValue, "TPSTransformer"))
4747 : {
4748 3 : *ppfnFunc = GDALTPSTransform;
4749 3 : *ppTransformArg = GDALDeserializeTPSTransformer(psTree);
4750 : }
4751 159 : else if (EQUAL(psTree->pszValue, "GeoLocTransformer"))
4752 : {
4753 1 : *ppfnFunc = GDALGeoLocTransform;
4754 1 : *ppTransformArg = GDALDeserializeGeoLocTransformer(psTree);
4755 : }
4756 158 : else if (EQUAL(psTree->pszValue, "RPCTransformer"))
4757 : {
4758 0 : *ppfnFunc = GDALRPCTransform;
4759 0 : *ppTransformArg = GDALDeserializeRPCTransformer(psTree);
4760 : }
4761 158 : else if (EQUAL(psTree->pszValue, "ApproxTransformer"))
4762 : {
4763 151 : *ppfnFunc = GDALApproxTransform;
4764 151 : *ppTransformArg = GDALDeserializeApproxTransformer(psTree);
4765 : }
4766 7 : else if (EQUAL(psTree->pszValue, "HomographyTransformer"))
4767 : {
4768 7 : *ppfnFunc = GDALHomographyTransform;
4769 7 : *ppTransformArg = GDALDeserializeHomographyTransformer(psTree);
4770 : }
4771 : else
4772 : {
4773 0 : GDALTransformDeserializeFunc pfnDeserializeFunc = nullptr;
4774 : {
4775 0 : CPLMutexHolderD(&hDeserializerMutex);
4776 0 : CPLList *psList = psListDeserializer;
4777 0 : while (psList)
4778 : {
4779 0 : TransformDeserializerInfo *psInfo =
4780 : static_cast<TransformDeserializerInfo *>(psList->pData);
4781 0 : if (strcmp(psInfo->pszTransformName, psTree->pszValue) == 0)
4782 : {
4783 0 : *ppfnFunc = psInfo->pfnTransformerFunc;
4784 0 : pfnDeserializeFunc = psInfo->pfnDeserializeFunc;
4785 0 : break;
4786 : }
4787 0 : psList = psList->psNext;
4788 : }
4789 : }
4790 :
4791 0 : if (pfnDeserializeFunc != nullptr)
4792 : {
4793 0 : *ppTransformArg = pfnDeserializeFunc(psTree);
4794 : }
4795 : else
4796 : {
4797 0 : CPLError(CE_Failure, CPLE_AppDefined,
4798 : "Unrecognized element '%s' GDALDeserializeTransformer",
4799 : psTree->pszValue);
4800 : }
4801 : }
4802 :
4803 569 : return CPLGetLastErrorType();
4804 : }
4805 :
4806 : /************************************************************************/
4807 : /* GDALDestroyTransformer() */
4808 : /************************************************************************/
4809 :
4810 4925 : void GDALDestroyTransformer(void *pTransformArg)
4811 :
4812 : {
4813 4925 : if (pTransformArg == nullptr)
4814 0 : return;
4815 :
4816 4925 : GDALTransformerInfo *psInfo =
4817 : static_cast<GDALTransformerInfo *>(pTransformArg);
4818 :
4819 4925 : if (memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4820 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4821 : {
4822 0 : CPLError(CE_Failure, CPLE_AppDefined,
4823 : "Attempt to destroy non-GTI2 transformer.");
4824 0 : return;
4825 : }
4826 :
4827 4925 : psInfo->pfnCleanup(pTransformArg);
4828 : }
4829 :
4830 : /************************************************************************/
4831 : /* GDALUseTransformer() */
4832 : /************************************************************************/
4833 :
4834 8683 : int GDALUseTransformer(void *pTransformArg, int bDstToSrc, int nPointCount,
4835 : double *x, double *y, double *z, int *panSuccess)
4836 : {
4837 8683 : GDALTransformerInfo *psInfo =
4838 : static_cast<GDALTransformerInfo *>(pTransformArg);
4839 :
4840 8683 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4841 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4842 : {
4843 0 : CPLError(CE_Failure, CPLE_AppDefined,
4844 : "Attempt to use non-GTI2 transformer.");
4845 0 : return FALSE;
4846 : }
4847 :
4848 8683 : return psInfo->pfnTransform(pTransformArg, bDstToSrc, nPointCount, x, y, z,
4849 8683 : panSuccess);
4850 : }
4851 :
4852 : /************************************************************************/
4853 : /* GDALCloneTransformer() */
4854 : /************************************************************************/
4855 :
4856 71 : void *GDALCloneTransformer(void *pTransformArg)
4857 : {
4858 71 : GDALTransformerInfo *psInfo =
4859 : static_cast<GDALTransformerInfo *>(pTransformArg);
4860 :
4861 71 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4862 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4863 : {
4864 0 : CPLError(CE_Failure, CPLE_AppDefined,
4865 : "Attempt to clone non-GTI2 transformer.");
4866 0 : return nullptr;
4867 : }
4868 :
4869 71 : if (psInfo->pfnCreateSimilar != nullptr)
4870 : {
4871 36 : return psInfo->pfnCreateSimilar(psInfo, 1.0, 1.0);
4872 : }
4873 :
4874 35 : if (psInfo->pfnSerialize == nullptr)
4875 : {
4876 0 : CPLError(CE_Failure, CPLE_AppDefined,
4877 : "No serialization function available for this transformer.");
4878 0 : return nullptr;
4879 : }
4880 :
4881 35 : CPLXMLNode *pSerialized = psInfo->pfnSerialize(pTransformArg);
4882 35 : if (pSerialized == nullptr)
4883 0 : return nullptr;
4884 35 : GDALTransformerFunc pfnTransformer = nullptr;
4885 35 : void *pClonedTransformArg = nullptr;
4886 35 : if (GDALDeserializeTransformer(pSerialized, &pfnTransformer,
4887 35 : &pClonedTransformArg) != CE_None)
4888 : {
4889 0 : CPLDestroyXMLNode(pSerialized);
4890 0 : CPLFree(pClonedTransformArg);
4891 0 : return nullptr;
4892 : }
4893 :
4894 35 : CPLDestroyXMLNode(pSerialized);
4895 35 : return pClonedTransformArg;
4896 : }
4897 :
4898 : /************************************************************************/
4899 : /* GDALCreateSimilarTransformer() */
4900 : /************************************************************************/
4901 :
4902 68 : void *GDALCreateSimilarTransformer(void *pTransformArg, double dfRatioX,
4903 : double dfRatioY)
4904 : {
4905 68 : GDALTransformerInfo *psInfo =
4906 : static_cast<GDALTransformerInfo *>(pTransformArg);
4907 :
4908 68 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4909 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4910 : {
4911 0 : CPLError(CE_Failure, CPLE_AppDefined,
4912 : "Attempt to call CreateSimilar on a non-GTI2 transformer.");
4913 0 : return nullptr;
4914 : }
4915 :
4916 68 : if (psInfo->pfnCreateSimilar == nullptr)
4917 : {
4918 0 : CPLError(CE_Failure, CPLE_AppDefined,
4919 : "No CreateSimilar function available for this transformer.");
4920 0 : return nullptr;
4921 : }
4922 :
4923 68 : return psInfo->pfnCreateSimilar(psInfo, dfRatioX, dfRatioY);
4924 : }
4925 :
4926 : /************************************************************************/
4927 : /* GetGenImgProjTransformInfo() */
4928 : /************************************************************************/
4929 :
4930 44 : static GDALTransformerInfo *GetGenImgProjTransformInfo(const char *pszFunc,
4931 : void *pTransformArg)
4932 : {
4933 44 : GDALTransformerInfo *psInfo =
4934 : static_cast<GDALTransformerInfo *>(pTransformArg);
4935 :
4936 44 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4937 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4938 : {
4939 0 : CPLError(CE_Failure, CPLE_AppDefined,
4940 : "Attempt to call %s on "
4941 : "a non-GTI2 transformer.",
4942 : pszFunc);
4943 0 : return nullptr;
4944 : }
4945 :
4946 44 : if (EQUAL(psInfo->pszClassName, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
4947 : {
4948 14 : GDALApproxTransformInfo *psATInfo =
4949 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
4950 14 : psInfo = static_cast<GDALTransformerInfo *>(psATInfo->pBaseCBData);
4951 :
4952 14 : if (psInfo == nullptr ||
4953 14 : memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4954 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4955 : {
4956 0 : CPLError(CE_Failure, CPLE_AppDefined,
4957 : "Attempt to call %s on "
4958 : "a non-GTI2 transformer.",
4959 : pszFunc);
4960 0 : return nullptr;
4961 : }
4962 : }
4963 :
4964 44 : if (EQUAL(psInfo->pszClassName, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4965 : {
4966 44 : return psInfo;
4967 : }
4968 :
4969 0 : return nullptr;
4970 : }
4971 :
4972 : /************************************************************************/
4973 : /* GDALSetTransformerDstGeoTransform() */
4974 : /************************************************************************/
4975 :
4976 : /**
4977 : * Set ApproxTransformer or GenImgProj output geotransform.
4978 : *
4979 : * This is a layer above GDALSetGenImgProjTransformerDstGeoTransform() that
4980 : * checks that the passed hTransformArg is compatible.
4981 : *
4982 : * Normally the "destination geotransform", or transformation between
4983 : * georeferenced output coordinates and pixel/line coordinates on the
4984 : * destination file is extracted from the destination file by
4985 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
4986 : * info. However, sometimes it is inconvenient to have an output file
4987 : * handle with appropriate geotransform information when creating the
4988 : * transformation. For these cases, this function can be used to apply
4989 : * the destination geotransform.
4990 : *
4991 : * @param pTransformArg the handle to update.
4992 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
4993 : */
4994 :
4995 22 : void GDALSetTransformerDstGeoTransform(void *pTransformArg,
4996 : const double *padfGeoTransform)
4997 : {
4998 22 : VALIDATE_POINTER0(pTransformArg, "GDALSetTransformerDstGeoTransform");
4999 :
5000 22 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
5001 : "GDALSetTransformerDstGeoTransform", pTransformArg);
5002 22 : if (psInfo)
5003 : {
5004 22 : GDALSetGenImgProjTransformerDstGeoTransform(psInfo, padfGeoTransform);
5005 : }
5006 : }
5007 :
5008 : /************************************************************************/
5009 : /* GDALGetTransformerDstGeoTransform() */
5010 : /************************************************************************/
5011 :
5012 : /**
5013 : * Get ApproxTransformer or GenImgProj output geotransform.
5014 : *
5015 : * @param pTransformArg transformer handle.
5016 : * @param padfGeoTransform (output) the destination geotransform to return (six
5017 : * doubles).
5018 : */
5019 :
5020 22 : void GDALGetTransformerDstGeoTransform(void *pTransformArg,
5021 : double *padfGeoTransform)
5022 : {
5023 22 : VALIDATE_POINTER0(pTransformArg, "GDALGetTransformerDstGeoTransform");
5024 :
5025 22 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
5026 : "GDALGetTransformerDstGeoTransform", pTransformArg);
5027 22 : if (psInfo)
5028 : {
5029 22 : GDALGenImgProjTransformInfo *psGenImgProjInfo =
5030 : reinterpret_cast<GDALGenImgProjTransformInfo *>(psInfo);
5031 :
5032 22 : memcpy(padfGeoTransform, psGenImgProjInfo->sDstParams.adfGeoTransform,
5033 : sizeof(double) * 6);
5034 : }
5035 : }
5036 :
5037 : /************************************************************************/
5038 : /* GDALTransformIsTranslationOnPixelBoundaries() */
5039 : /************************************************************************/
5040 :
5041 1746 : bool GDALTransformIsTranslationOnPixelBoundaries(GDALTransformerFunc,
5042 : void *pTransformerArg)
5043 : {
5044 1746 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5045 : {
5046 1416 : const auto *pApproxInfo =
5047 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5048 1416 : pTransformerArg = pApproxInfo->pBaseCBData;
5049 : }
5050 1746 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5051 : {
5052 1593 : const auto *pGenImgpProjInfo =
5053 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5054 498 : const auto IsCloseToInteger = [](double dfVal)
5055 498 : { return std::fabs(dfVal - std::round(dfVal)) <= 1e-6; };
5056 3104 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5057 1511 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5058 1509 : pGenImgpProjInfo->pReproject == nullptr &&
5059 658 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[1] ==
5060 658 : pGenImgpProjInfo->sDstParams.adfGeoTransform[1] &&
5061 384 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[5] ==
5062 384 : pGenImgpProjInfo->sDstParams.adfGeoTransform[5] &&
5063 267 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] ==
5064 267 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] &&
5065 267 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] ==
5066 534 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] &&
5067 : // Check that the georeferenced origin of the destination
5068 : // geotransform is close to be an integer value when transformed
5069 : // to source image coordinates
5070 267 : IsCloseToInteger(
5071 267 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[0] +
5072 267 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5073 267 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[1] +
5074 267 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5075 3371 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[2]) &&
5076 231 : IsCloseToInteger(
5077 231 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[3] +
5078 231 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5079 231 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[4] +
5080 231 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5081 1824 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[5]);
5082 : }
5083 153 : return false;
5084 : }
5085 :
5086 : /************************************************************************/
5087 : /* GDALTransformIsAffineNoRotation() */
5088 : /************************************************************************/
5089 :
5090 19 : bool GDALTransformIsAffineNoRotation(GDALTransformerFunc, void *pTransformerArg)
5091 : {
5092 19 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5093 : {
5094 19 : const auto *pApproxInfo =
5095 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5096 19 : pTransformerArg = pApproxInfo->pBaseCBData;
5097 : }
5098 19 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5099 : {
5100 19 : const auto *pGenImgpProjInfo =
5101 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5102 38 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5103 19 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5104 19 : pGenImgpProjInfo->pReproject == nullptr &&
5105 9 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] == 0 &&
5106 9 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] == 0 &&
5107 47 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] == 0 &&
5108 28 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] == 0;
5109 : }
5110 0 : return false;
5111 : }
5112 :
5113 : /************************************************************************/
5114 : /* GDALTransformHasFastClone() */
5115 : /************************************************************************/
5116 :
5117 : /** Returns whether GDALCloneTransformer() on this transformer is
5118 : * "fast"
5119 : * Counter-examples are GCPs or TPSs transformers.
5120 : */
5121 2 : bool GDALTransformHasFastClone(void *pTransformerArg)
5122 : {
5123 2 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5124 : {
5125 1 : const auto *pApproxInfo =
5126 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5127 1 : pTransformerArg = pApproxInfo->pBaseCBData;
5128 : // Fallback to next lines
5129 : }
5130 :
5131 2 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5132 : {
5133 2 : const auto *pGenImgpProjInfo =
5134 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5135 2 : return (pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr ||
5136 0 : GDALTransformHasFastClone(
5137 4 : pGenImgpProjInfo->sSrcParams.pTransformArg)) &&
5138 2 : (pGenImgpProjInfo->sDstParams.pTransformArg == nullptr ||
5139 0 : GDALTransformHasFastClone(
5140 2 : pGenImgpProjInfo->sDstParams.pTransformArg));
5141 : }
5142 0 : else if (GDALIsTransformer(pTransformerArg,
5143 : GDAL_RPC_TRANSFORMER_CLASS_NAME))
5144 : {
5145 0 : return true;
5146 : }
5147 : else
5148 : {
5149 0 : return false;
5150 : }
5151 : }
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