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 13861 : bool GDALIsTransformer(void *hTransformerArg, const char *pszClassName)
68 : {
69 13861 : if (!hTransformerArg)
70 558 : return false;
71 : // All transformers should have a GDALTransformerInfo member as their first members
72 13303 : GDALTransformerInfo *psInfo =
73 : static_cast<GDALTransformerInfo *>(hTransformerArg);
74 13303 : return memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
75 25712 : strlen(GDAL_GTI2_SIGNATURE)) == 0 &&
76 25712 : 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 :
189 580 : static bool GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
190 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
191 : int /* nPixels*/, int nLines, double dfPixelSizeX, double dfPixelSizeY)
192 : {
193 580 : double adfX[21] = {};
194 580 : double adfY[21] = {};
195 :
196 580 : const double dfMaxXOut = padfExtent[2];
197 580 : const double dfMaxYOut = padfExtent[3];
198 :
199 : // Take 20 steps.
200 580 : int nSamplePoints = 0;
201 12760 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
202 : {
203 : // Ensure we end exactly at the end.
204 12180 : if (dfRatio > 0.99)
205 580 : dfRatio = 1.0;
206 :
207 : // Along right.
208 12180 : adfX[nSamplePoints] = dfMaxXOut;
209 12180 : adfY[nSamplePoints] = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
210 12180 : nSamplePoints++;
211 : }
212 580 : double adfZ[21] = {};
213 :
214 580 : int abSuccess[21] = {};
215 :
216 580 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
217 : abSuccess);
218 :
219 580 : int abSuccess2[21] = {};
220 :
221 580 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
222 : abSuccess2);
223 :
224 580 : nSamplePoints = 0;
225 580 : int nBadCount = 0;
226 12760 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
227 : {
228 12180 : const double expected_x = dfMaxXOut;
229 12180 : const double expected_y = dfMaxYOut - dfPixelSizeY * dfRatio * nLines;
230 12180 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
231 9368 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
232 8078 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
233 : {
234 4102 : nBadCount++;
235 : }
236 12180 : nSamplePoints++;
237 : }
238 :
239 580 : return nBadCount == nSamplePoints;
240 : }
241 :
242 487 : static bool GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
243 : GDALTransformerFunc pfnTransformer, void *pTransformArg, double *padfExtent,
244 : int nPixels, int /* nLines */, double dfPixelSizeX, double dfPixelSizeY)
245 : {
246 487 : double adfX[21] = {};
247 487 : double adfY[21] = {};
248 :
249 487 : const double dfMinXOut = padfExtent[0];
250 487 : const double dfMinYOut = padfExtent[1];
251 :
252 : // Take 20 steps.
253 487 : int nSamplePoints = 0;
254 10714 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
255 : {
256 : // Ensure we end exactly at the end.
257 10227 : if (dfRatio > 0.99)
258 487 : dfRatio = 1.0;
259 :
260 : // Along right.
261 10227 : adfX[nSamplePoints] = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
262 10227 : adfY[nSamplePoints] = dfMinYOut;
263 10227 : nSamplePoints++;
264 : }
265 487 : double adfZ[21] = {};
266 :
267 487 : int abSuccess[21] = {};
268 :
269 487 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, adfX, adfY, adfZ,
270 : abSuccess);
271 :
272 487 : int abSuccess2[21] = {};
273 :
274 487 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, adfX, adfY, adfZ,
275 : abSuccess2);
276 :
277 487 : nSamplePoints = 0;
278 487 : int nBadCount = 0;
279 10714 : for (double dfRatio = 0.0; dfRatio <= 1.01; dfRatio += 0.05)
280 : {
281 10227 : const double expected_x = dfMinXOut + dfPixelSizeX * dfRatio * nPixels;
282 10227 : const double expected_y = dfMinYOut;
283 10227 : if (!abSuccess[nSamplePoints] || !abSuccess2[nSamplePoints] ||
284 8299 : fabs(adfX[nSamplePoints] - expected_x) > dfPixelSizeX ||
285 8010 : fabs(adfY[nSamplePoints] - expected_y) > dfPixelSizeY)
286 : {
287 2217 : nBadCount++;
288 : }
289 10227 : nSamplePoints++;
290 : }
291 :
292 487 : 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 1042 : 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 1042 : VALIDATE_POINTER1(hSrcDS, "GDALSuggestedWarpOutput2", CE_Failure);
350 :
351 : const bool bIsGDALGenImgProjTransform{
352 2084 : pTransformArg &&
353 1042 : GDALIsTransformer(pTransformArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME)};
354 :
355 : /* -------------------------------------------------------------------- */
356 : /* Setup sample points all around the edge of the input raster. */
357 : /* -------------------------------------------------------------------- */
358 1042 : if (bIsGDALGenImgProjTransform)
359 : {
360 : // In case CHECK_WITH_INVERT_PROJ has been modified.
361 1042 : 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 1042 : const int nInXSize = GDALGetRasterXSize(hSrcDS);
371 1042 : const int nInYSize = GDALGetRasterYSize(hSrcDS);
372 :
373 : /* ------------------------------------------------------------- */
374 : /* Special case for warping on the same (or null) CRS. */
375 : /* ------------------------------------------------------------- */
376 1042 : if ((!nOptions || (nOptions & GDAL_SWO_FORCE_SQUARE_PIXEL) == 0) &&
377 1041 : pTransformArg && bIsGDALGenImgProjTransform)
378 : {
379 1041 : const GDALGenImgProjTransformInfo *psInfo =
380 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
381 :
382 1041 : if (!psInfo->sSrcParams.pTransformer &&
383 968 : !psInfo->bHasCustomTransformationPipeline &&
384 964 : !psInfo->sDstParams.pTransformer &&
385 964 : psInfo->sSrcParams.adfGeoTransform[2] == 0 &&
386 964 : psInfo->sSrcParams.adfGeoTransform[4] == 0 &&
387 964 : psInfo->sDstParams.adfGeoTransform[0] == 0 &&
388 952 : psInfo->sDstParams.adfGeoTransform[1] == 1 &&
389 952 : psInfo->sDstParams.adfGeoTransform[2] == 0 &&
390 952 : psInfo->sDstParams.adfGeoTransform[3] == 0 &&
391 952 : psInfo->sDstParams.adfGeoTransform[4] == 0 &&
392 952 : psInfo->sDstParams.adfGeoTransform[5] == 1)
393 : {
394 952 : const OGRSpatialReference *poSourceCRS = nullptr;
395 952 : const OGRSpatialReference *poTargetCRS = nullptr;
396 :
397 952 : if (psInfo->pReprojectArg)
398 : {
399 680 : const GDALReprojectionTransformInfo *psRTI =
400 : static_cast<const GDALReprojectionTransformInfo *>(
401 : psInfo->pReprojectArg);
402 680 : poSourceCRS = psRTI->poForwardTransform->GetSourceCS();
403 680 : poTargetCRS = psRTI->poForwardTransform->GetTargetCS();
404 : }
405 :
406 1632 : if ((!poSourceCRS && !poTargetCRS) ||
407 680 : (poSourceCRS && poTargetCRS &&
408 680 : poSourceCRS->IsSame(poTargetCRS)))
409 : {
410 :
411 620 : const bool bNorthUp{psInfo->sSrcParams.adfGeoTransform[5] <
412 : 0.0};
413 :
414 620 : memcpy(padfGeoTransformOut, psInfo->sSrcParams.adfGeoTransform,
415 : sizeof(double) * 6);
416 :
417 620 : if (!bNorthUp)
418 : {
419 62 : padfGeoTransformOut[3] = padfGeoTransformOut[3] +
420 62 : nInYSize * padfGeoTransformOut[5];
421 62 : padfGeoTransformOut[5] = -padfGeoTransformOut[5];
422 : }
423 :
424 620 : *pnPixels = nInXSize;
425 620 : *pnLines = nInYSize;
426 :
427 : // Calculate extent from hSrcDS
428 620 : if (padfExtent)
429 : {
430 620 : padfExtent[0] = psInfo->sSrcParams.adfGeoTransform[0];
431 620 : padfExtent[1] =
432 620 : psInfo->sSrcParams.adfGeoTransform[3] +
433 620 : nInYSize * psInfo->sSrcParams.adfGeoTransform[5];
434 620 : padfExtent[2] =
435 620 : psInfo->sSrcParams.adfGeoTransform[0] +
436 620 : nInXSize * psInfo->sSrcParams.adfGeoTransform[1];
437 620 : padfExtent[3] = psInfo->sSrcParams.adfGeoTransform[3];
438 620 : if (!bNorthUp)
439 : {
440 62 : std::swap(padfExtent[1], padfExtent[3]);
441 : }
442 : }
443 620 : return CE_None;
444 : }
445 : }
446 : }
447 :
448 422 : const int N_PIXELSTEP = 50;
449 : int nSteps = static_cast<int>(
450 422 : static_cast<double>(std::min(nInYSize, nInXSize)) / N_PIXELSTEP + 0.5);
451 422 : if (nSteps < 20)
452 397 : nSteps = 20;
453 25 : else if (nSteps > 100)
454 10 : 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?
461 422 : retry:
462 422 : int nStepsPlusOne = nSteps + 1;
463 422 : int nSampleMax = nStepsPlusOne * nStepsPlusOne;
464 :
465 422 : double dfStep = 1.0 / nSteps;
466 422 : double *padfY = nullptr;
467 422 : double *padfZ = nullptr;
468 422 : double *padfYRevert = nullptr;
469 422 : double *padfZRevert = nullptr;
470 :
471 : int *pabSuccess = static_cast<int *>(
472 422 : VSI_MALLOC3_VERBOSE(sizeof(int), nStepsPlusOne, nStepsPlusOne));
473 : double *padfX = static_cast<double *>(
474 422 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
475 : double *padfXRevert = static_cast<double *>(
476 422 : VSI_MALLOC3_VERBOSE(sizeof(double) * 3, nStepsPlusOne, nStepsPlusOne));
477 422 : 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 :
490 422 : padfY = padfX + nSampleMax;
491 422 : padfZ = padfX + nSampleMax * 2;
492 422 : padfYRevert = padfXRevert + nSampleMax;
493 422 : padfZRevert = padfXRevert + nSampleMax * 2;
494 :
495 : // Take N_STEPS steps.
496 10187 : for (int iStep = 0; iStep <= nSteps; iStep++)
497 : {
498 9765 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
499 9765 : int iStep2 = iStep;
500 :
501 : // Along top.
502 9765 : padfX[iStep2] = dfRatio * nInXSize;
503 9765 : padfY[iStep2] = 0.0;
504 9765 : padfZ[iStep2] = 0.0;
505 :
506 : // Along bottom.
507 9765 : iStep2 += nStepsPlusOne;
508 9765 : padfX[iStep2] = dfRatio * nInXSize;
509 9765 : padfY[iStep2] = nInYSize;
510 9765 : padfZ[iStep2] = 0.0;
511 :
512 : // Along left.
513 9765 : iStep2 += nStepsPlusOne;
514 9765 : padfX[iStep2] = 0.0;
515 9765 : padfY[iStep2] = dfRatio * nInYSize;
516 9765 : padfZ[iStep2] = 0.0;
517 :
518 : // Along right.
519 9765 : iStep2 += nStepsPlusOne;
520 9765 : padfX[iStep2] = nInXSize;
521 9765 : padfY[iStep2] = dfRatio * nInYSize;
522 9765 : padfZ[iStep2] = 0.0;
523 : }
524 :
525 422 : int nSamplePoints = 4 * nStepsPlusOne;
526 :
527 422 : memset(pabSuccess, 1, sizeof(int) * nSampleMax);
528 :
529 : /* -------------------------------------------------------------------- */
530 : /* Transform them to the output coordinate system. */
531 : /* -------------------------------------------------------------------- */
532 : {
533 844 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
534 422 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY, padfZ,
535 : pabSuccess);
536 : }
537 422 : constexpr int SIGN_FINAL_UNINIT = -2;
538 422 : constexpr int SIGN_FINAL_INVALID = 0;
539 422 : int iSignDiscontinuity = SIGN_FINAL_UNINIT;
540 422 : int nFailedCount = 0;
541 422 : const int iSignArray[2] = {-1, 1};
542 39482 : for (int i = 0; i < nSamplePoints; i++)
543 : {
544 39060 : 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 34999 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
552 : {
553 10631 : if (!((iSignDiscontinuity * padfX[i] > 0 &&
554 10563 : 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 24368 : else if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
561 : {
562 987 : for (const auto &iSign : iSignArray)
563 : {
564 727 : if ((iSign * padfX[i] > 0 && iSign * padfX[i] <= 180.0) ||
565 567 : (fabs(padfX[i] - iSign * -180.0) < 1e-8))
566 : {
567 160 : iSignDiscontinuity = iSign;
568 160 : break;
569 : }
570 : }
571 420 : if (iSignDiscontinuity == SIGN_FINAL_UNINIT)
572 : {
573 260 : iSignDiscontinuity = SIGN_FINAL_INVALID;
574 : }
575 : }
576 : }
577 : else
578 : {
579 4061 : nFailedCount++;
580 : }
581 : }
582 :
583 422 : if (iSignDiscontinuity == 1 || iSignDiscontinuity == -1)
584 : {
585 11018 : for (int i = 0; i < nSamplePoints; i++)
586 : {
587 10904 : if (pabSuccess[i])
588 : {
589 10287 : 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 : /* -------------------------------------------------------------------- */
613 422 : if (nFailedCount)
614 : {
615 86 : CPLDebug("WARP", "At least one point failed after direct transform");
616 : }
617 : else
618 : {
619 336 : memcpy(padfXRevert, padfX, nSamplePoints * sizeof(double));
620 336 : memcpy(padfYRevert, padfY, nSamplePoints * sizeof(double));
621 336 : memcpy(padfZRevert, padfZ, nSamplePoints * sizeof(double));
622 : {
623 672 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
624 336 : pfnTransformer(pTransformArg, TRUE, nSamplePoints, padfXRevert,
625 : padfYRevert, padfZRevert, pabSuccess);
626 : }
627 :
628 30054 : for (int i = 0; nFailedCount == 0 && i < nSamplePoints; i++)
629 : {
630 29734 : if (!pabSuccess[i])
631 : {
632 16 : nFailedCount++;
633 16 : break;
634 : }
635 :
636 29718 : double dfRatio = (i % nStepsPlusOne) * dfStep;
637 29718 : if (dfRatio > 0.99)
638 1266 : dfRatio = 1.0;
639 :
640 29718 : double dfExpectedX = 0.0;
641 29718 : double dfExpectedY = 0.0;
642 29718 : if (i < nStepsPlusOne)
643 : {
644 7563 : dfExpectedX = dfRatio * nInXSize;
645 : }
646 22155 : else if (i < 2 * nStepsPlusOne)
647 : {
648 7513 : dfExpectedX = dfRatio * nInXSize;
649 7513 : dfExpectedY = nInYSize;
650 : }
651 14642 : else if (i < 3 * nStepsPlusOne)
652 : {
653 7383 : dfExpectedY = dfRatio * nInYSize;
654 : }
655 : else
656 : {
657 7259 : dfExpectedX = nInXSize;
658 7259 : dfExpectedY = dfRatio * nInYSize;
659 : }
660 :
661 29718 : if (fabs(padfXRevert[i] - dfExpectedX) >
662 29718 : nInXSize / static_cast<double>(nSteps) ||
663 29706 : fabs(padfYRevert[i] - dfExpectedY) >
664 29706 : nInYSize / static_cast<double>(nSteps))
665 12 : nFailedCount++;
666 : }
667 336 : if (nFailedCount != 0)
668 28 : CPLDebug("WARP",
669 : "At least one point failed after revert transform");
670 : }
671 :
672 : /* -------------------------------------------------------------------- */
673 : /* If any of the edge points failed to transform, we need to */
674 : /* build a fairly detailed internal grid of points instead to */
675 : /* help identify the area that is transformable. */
676 : /* -------------------------------------------------------------------- */
677 422 : if (nFailedCount)
678 : {
679 114 : nSamplePoints = 0;
680 :
681 : // Take N_STEPS steps.
682 2662 : for (int iStep = 0; iStep <= nSteps; iStep++)
683 : {
684 2548 : double dfRatio = (iStep == nSteps) ? 1.0 : iStep * dfStep;
685 :
686 69582 : for (int iStep2 = 0; iStep2 <= nSteps; iStep2++)
687 : {
688 67034 : const double dfRatio2 =
689 67034 : iStep2 == nSteps ? 1.0 : iStep2 * dfStep;
690 :
691 : // From top to bottom, from left to right.
692 67034 : padfX[nSamplePoints] = dfRatio2 * nInXSize;
693 67034 : padfY[nSamplePoints] = dfRatio * nInYSize;
694 67034 : padfZ[nSamplePoints] = 0.0;
695 67034 : nSamplePoints++;
696 : }
697 : }
698 :
699 114 : CPLAssert(nSamplePoints == nSampleMax);
700 :
701 : {
702 228 : CPLTurnFailureIntoWarningBackuper oErrorsToWarnings{};
703 114 : pfnTransformer(pTransformArg, FALSE, nSamplePoints, padfX, padfY,
704 : padfZ, pabSuccess);
705 : }
706 : }
707 :
708 : /* -------------------------------------------------------------------- */
709 : /* Collect the bounds, ignoring any failed points. */
710 : /* -------------------------------------------------------------------- */
711 422 : double dfMinXOut = 0.0;
712 422 : double dfMinYOut = 0.0;
713 422 : double dfMaxXOut = 0.0;
714 422 : double dfMaxYOut = 0.0;
715 422 : bool bGotInitialPoint = false;
716 :
717 422 : nFailedCount = 0;
718 96324 : for (int i = 0; i < nSamplePoints; i++)
719 : {
720 95902 : int x_i = 0;
721 95902 : int y_i = 0;
722 :
723 95902 : if (nSamplePoints == nSampleMax)
724 : {
725 67034 : x_i = i % nStepsPlusOne;
726 67034 : y_i = i / nStepsPlusOne;
727 : }
728 : else
729 : {
730 28868 : if (i < 2 * nStepsPlusOne)
731 : {
732 14434 : x_i = i % nStepsPlusOne;
733 14434 : y_i = (i < nStepsPlusOne) ? 0 : nSteps;
734 : }
735 : }
736 :
737 95902 : if (x_i > 0 && (pabSuccess[i - 1] || pabSuccess[i]))
738 : {
739 65625 : double x_out_before = padfX[i - 1];
740 65625 : double x_out_after = padfX[i];
741 65625 : int nIter = 0;
742 65625 : double x_in_before =
743 65625 : static_cast<double>(x_i - 1) * nInXSize / nSteps;
744 65625 : double x_in_after = static_cast<double>(x_i) * nInXSize / nSteps;
745 65625 : int invalid_before = !(pabSuccess[i - 1]);
746 65625 : 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 82886 : while ((invalid_before || invalid_after ||
753 173439 : x_out_before * x_out_after < 0.0) &&
754 : nIter < 16)
755 : {
756 24928 : double x = (x_in_before + x_in_after) / 2.0;
757 24928 : double y = static_cast<double>(y_i) * nInYSize / nSteps;
758 24928 : double z = 0.0;
759 24928 : int bSuccess = TRUE;
760 24928 : if (pfnTransformer(pTransformArg, FALSE, 1, &x, &y, &z,
761 43046 : &bSuccess) &&
762 18118 : bSuccess)
763 : {
764 18118 : if (bGotInitialPoint)
765 : {
766 18098 : dfMinXOut = std::min(dfMinXOut, x);
767 18098 : dfMinYOut = std::min(dfMinYOut, y);
768 18098 : dfMaxXOut = std::max(dfMaxXOut, x);
769 18098 : 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 18118 : if (invalid_before || x_out_before * x < 0)
781 : {
782 9857 : invalid_after = FALSE;
783 9857 : x_in_after = (x_in_before + x_in_after) / 2.0;
784 9857 : x_out_after = x;
785 : }
786 : else
787 : {
788 8261 : invalid_before = FALSE;
789 8261 : x_out_before = x;
790 8261 : 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 24928 : nIter++;
809 : }
810 : }
811 :
812 95902 : if (!pabSuccess[i])
813 : {
814 13718 : nFailedCount++;
815 13718 : continue;
816 : }
817 :
818 82184 : if (bGotInitialPoint)
819 : {
820 81784 : dfMinXOut = std::min(dfMinXOut, padfX[i]);
821 81784 : dfMinYOut = std::min(dfMinYOut, padfY[i]);
822 81784 : dfMaxXOut = std::max(dfMaxXOut, padfX[i]);
823 81784 : dfMaxYOut = std::max(dfMaxYOut, padfY[i]);
824 : }
825 : else
826 : {
827 400 : bGotInitialPoint = true;
828 400 : dfMinXOut = padfX[i];
829 400 : dfMaxXOut = padfX[i];
830 400 : dfMinYOut = padfY[i];
831 400 : dfMaxYOut = padfY[i];
832 : }
833 : }
834 :
835 422 : 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 :
849 417 : if (nFailedCount)
850 82 : CPLDebug("GDAL",
851 : "GDALSuggestedWarpOutput(): %d out of %d points failed to "
852 : "transform.",
853 : nFailedCount, nSamplePoints);
854 :
855 417 : bool bIsGeographicCoordsDeg = false;
856 417 : if (bIsGDALGenImgProjTransform)
857 : {
858 417 : const GDALGenImgProjTransformInfo *pGIPTI =
859 : static_cast<const GDALGenImgProjTransformInfo *>(pTransformArg);
860 417 : if (pGIPTI->sSrcParams.pTransformer == GDALGeoLocTransform &&
861 28 : pGIPTI->sDstParams.pTransformer == nullptr &&
862 28 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
863 26 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
864 26 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
865 26 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
866 26 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
867 26 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
868 : {
869 : /* --------------------------------------------------------------------
870 : */
871 : /* Special case for geolocation array, to quickly find the
872 : * bounds. */
873 : /* --------------------------------------------------------------------
874 : */
875 26 : const GDALGeoLocTransformInfo *pGLTI =
876 : static_cast<const GDALGeoLocTransformInfo *>(
877 : pGIPTI->sSrcParams.pTransformArg);
878 :
879 26 : if (pGIPTI->pReproject == nullptr)
880 : {
881 : const char *pszGLSRS =
882 26 : CSLFetchNameValue(pGLTI->papszGeolocationInfo, "SRS");
883 26 : if (pszGLSRS == nullptr)
884 : {
885 4 : bIsGeographicCoordsDeg = true;
886 : }
887 : else
888 : {
889 44 : OGRSpatialReference oSRS;
890 22 : if (oSRS.SetFromUserInput(pszGLSRS) == OGRERR_NONE &&
891 42 : oSRS.IsGeographic() &&
892 20 : std::fabs(oSRS.GetAngularUnits() -
893 20 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9)
894 : {
895 20 : bIsGeographicCoordsDeg = true;
896 : }
897 : }
898 : }
899 :
900 208 : for (const auto &xy :
901 26 : {std::pair<double, double>(pGLTI->dfMinX, pGLTI->dfYAtMinX),
902 26 : std::pair<double, double>(pGLTI->dfXAtMinY, pGLTI->dfMinY),
903 26 : std::pair<double, double>(pGLTI->dfMaxX, pGLTI->dfYAtMaxX),
904 130 : std::pair<double, double>(pGLTI->dfXAtMaxY, pGLTI->dfMaxY)})
905 : {
906 104 : double x = xy.first;
907 104 : double y = xy.second;
908 104 : if (pGLTI->bSwapXY)
909 : {
910 4 : std::swap(x, y);
911 : }
912 104 : double xOut = std::numeric_limits<double>::quiet_NaN();
913 104 : double yOut = std::numeric_limits<double>::quiet_NaN();
914 104 : if (pGIPTI->pReproject == nullptr ||
915 0 : pGIPTI->pReproject(pGIPTI->pReprojectArg, false, 1, &x, &y,
916 : nullptr, nullptr))
917 : {
918 104 : xOut = x;
919 104 : yOut = y;
920 : }
921 104 : dfMinXOut = std::min(dfMinXOut, xOut);
922 104 : dfMinYOut = std::min(dfMinYOut, yOut);
923 104 : dfMaxXOut = std::max(dfMaxXOut, xOut);
924 104 : dfMaxYOut = std::max(dfMaxYOut, yOut);
925 26 : }
926 : }
927 391 : else if (pGIPTI->sSrcParams.pTransformer == nullptr &&
928 348 : pGIPTI->sDstParams.pTransformer == nullptr &&
929 348 : pGIPTI->pReproject == GDALReprojectionTransform &&
930 337 : pGIPTI->sDstParams.adfGeoTransform[0] == 0 &&
931 335 : pGIPTI->sDstParams.adfGeoTransform[1] == 1 &&
932 335 : pGIPTI->sDstParams.adfGeoTransform[2] == 0 &&
933 335 : pGIPTI->sDstParams.adfGeoTransform[3] == 0 &&
934 335 : pGIPTI->sDstParams.adfGeoTransform[4] == 0 &&
935 335 : pGIPTI->sDstParams.adfGeoTransform[5] == 1)
936 : {
937 : /* ------------------------------------------------------------- */
938 : /* Special case for warping using source geotransform and */
939 : /* reprojection to deal with the poles. */
940 : /* ------------------------------------------------------------- */
941 335 : const GDALReprojectionTransformInfo *psRTI =
942 : static_cast<const GDALReprojectionTransformInfo *>(
943 : pGIPTI->pReprojectArg);
944 : const OGRSpatialReference *poSourceCRS =
945 335 : psRTI->poForwardTransform->GetSourceCS();
946 : const OGRSpatialReference *poTargetCRS =
947 335 : psRTI->poForwardTransform->GetTargetCS();
948 669 : if (poTargetCRS != nullptr &&
949 334 : psRTI->poReverseTransform != nullptr &&
950 334 : poTargetCRS->IsGeographic() &&
951 116 : fabs(poTargetCRS->GetAngularUnits() -
952 785 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9 &&
953 116 : (!poSourceCRS || !poSourceCRS->IsGeographic()))
954 : {
955 89 : bIsGeographicCoordsDeg = true;
956 :
957 89 : std::unique_ptr<CPLConfigOptionSetter> poSetter;
958 89 : 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 :
970 267 : for (const auto &sign : iSignArray)
971 : {
972 178 : double X = 0.0;
973 178 : const double Yinit = 90.0 * sign;
974 178 : double Y = Yinit;
975 178 : if (psRTI->poReverseTransform->Transform(1, &X, &Y))
976 : {
977 122 : const auto invGT =
978 : pGIPTI->sSrcParams.adfInvGeoTransform;
979 122 : const double x = invGT[0] + X * invGT[1] + Y * invGT[2];
980 122 : const double y = invGT[3] + X * invGT[4] + Y * invGT[5];
981 122 : constexpr double EPSILON = 1e-5;
982 122 : if (x >= -EPSILON && x <= nInXSize + EPSILON &&
983 26 : y >= -EPSILON && y <= nInYSize + EPSILON)
984 : {
985 6 : if (psRTI->poForwardTransform->Transform(1, &X,
986 12 : &Y) &&
987 6 : fabs(Y - Yinit) <= 1e-6)
988 : {
989 6 : bool bMinXMaxXSet = false;
990 6 : if (poSourceCRS)
991 : {
992 : const char *pszProjection =
993 6 : poSourceCRS->GetAttrValue("PROJECTION");
994 6 : if (pszProjection &&
995 6 : EQUAL(pszProjection,
996 : SRS_PT_ORTHOGRAPHIC))
997 : {
998 : const double dfLon0 =
999 4 : poSourceCRS->GetNormProjParm(
1000 : SRS_PP_CENTRAL_MERIDIAN, 0.0);
1001 4 : dfMinXOut = dfLon0 - 90;
1002 4 : dfMaxXOut = dfLon0 + 90;
1003 4 : bMinXMaxXSet = true;
1004 : }
1005 : }
1006 6 : if (!bMinXMaxXSet)
1007 : {
1008 2 : dfMinXOut = -180;
1009 2 : dfMaxXOut = 180;
1010 : }
1011 6 : if (sign < 0)
1012 2 : dfMinYOut = Yinit;
1013 : else
1014 4 : dfMaxYOut = Yinit;
1015 : }
1016 : }
1017 : }
1018 : }
1019 :
1020 89 : 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 335 : if (poSourceCRS != nullptr && poTargetCRS != nullptr &&
1035 334 : pGIPTI->sSrcParams.adfGeoTransform[1] != 0 &&
1036 334 : pGIPTI->sSrcParams.adfGeoTransform[2] == 0 &&
1037 334 : pGIPTI->sSrcParams.adfGeoTransform[4] == 0 &&
1038 334 : pGIPTI->sSrcParams.adfGeoTransform[5] != 0)
1039 : {
1040 334 : const double dfULX = pGIPTI->sSrcParams.adfGeoTransform[0];
1041 334 : const double dfULY = pGIPTI->sSrcParams.adfGeoTransform[3];
1042 334 : const double dfLRX =
1043 334 : dfULX + pGIPTI->sSrcParams.adfGeoTransform[1] * nInXSize;
1044 334 : const double dfLRY =
1045 334 : dfULY + pGIPTI->sSrcParams.adfGeoTransform[5] * nInYSize;
1046 334 : const double dfMinSrcX = std::min(dfULX, dfLRX);
1047 334 : const double dfMinSrcY = std::min(dfULY, dfLRY);
1048 334 : const double dfMaxSrcX = std::max(dfULX, dfLRX);
1049 334 : const double dfMaxSrcY = std::max(dfULY, dfLRY);
1050 334 : double dfTmpMinXOut = std::numeric_limits<double>::max();
1051 334 : double dfTmpMinYOut = std::numeric_limits<double>::max();
1052 334 : double dfTmpMaxXOut = std::numeric_limits<double>::min();
1053 334 : double dfTmpMaxYOut = std::numeric_limits<double>::min();
1054 668 : if (psRTI->poForwardTransform->TransformBounds(
1055 : dfMinSrcX, dfMinSrcY, dfMaxSrcX, dfMaxSrcY,
1056 : &dfTmpMinXOut, &dfTmpMinYOut, &dfTmpMaxXOut,
1057 : &dfTmpMaxYOut,
1058 334 : 2)) // minimum number of points as we already have a
1059 : // logic above to sample
1060 : {
1061 327 : dfMinXOut = std::min(dfMinXOut, dfTmpMinXOut);
1062 327 : dfMinYOut = std::min(dfMinYOut, dfTmpMinYOut);
1063 327 : dfMaxXOut = std::max(dfMaxXOut, dfTmpMaxXOut);
1064 327 : 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 417 : double dfDiagonalDist = 0.0;
1078 417 : double dfDeltaX = 0.0;
1079 417 : double dfDeltaY = 0.0;
1080 :
1081 417 : if (pabSuccess[0] && pabSuccess[nSamplePoints - 1])
1082 : {
1083 340 : dfDeltaX = padfX[nSamplePoints - 1] - padfX[0];
1084 340 : 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 417 : if (dfDeltaX == 0.0 || dfDeltaY == 0.0)
1089 : {
1090 83 : dfDeltaX = dfMaxXOut - dfMinXOut;
1091 83 : dfDeltaY = dfMaxYOut - dfMinYOut;
1092 : }
1093 :
1094 417 : dfDiagonalDist = sqrt(dfDeltaX * dfDeltaX + dfDeltaY * dfDeltaY);
1095 :
1096 : /* -------------------------------------------------------------------- */
1097 : /* Compute a pixel size from this. */
1098 : /* -------------------------------------------------------------------- */
1099 : const double dfPixelSize =
1100 417 : dfDiagonalDist / sqrt(static_cast<double>(nInXSize) * nInXSize +
1101 417 : static_cast<double>(nInYSize) * nInYSize);
1102 :
1103 417 : const double dfPixels = (dfMaxXOut - dfMinXOut) / dfPixelSize;
1104 417 : const double dfLines = (dfMaxYOut - dfMinYOut) / dfPixelSize;
1105 :
1106 417 : const int knIntMaxMinusOne = std::numeric_limits<int>::max() - 1;
1107 417 : if (dfPixels > knIntMaxMinusOne || dfLines > knIntMaxMinusOne)
1108 : {
1109 0 : CPLError(CE_Failure, CPLE_AppDefined,
1110 : "Computed dimensions are too big : %.0f x %.0f",
1111 : dfPixels + 0.5, dfLines + 0.5);
1112 :
1113 0 : CPLFree(padfX);
1114 0 : CPLFree(padfXRevert);
1115 0 : CPLFree(pabSuccess);
1116 :
1117 0 : return CE_Failure;
1118 : }
1119 :
1120 417 : if ((nOptions & GDAL_SWO_ROUND_UP_SIZE) != 0)
1121 : {
1122 8 : constexpr double EPS = 1e-5;
1123 8 : *pnPixels = static_cast<int>(std::ceil(dfPixels - EPS));
1124 8 : *pnLines = static_cast<int>(std::ceil(dfLines - EPS));
1125 : }
1126 : else
1127 : {
1128 409 : *pnPixels = static_cast<int>(dfPixels + 0.5);
1129 409 : *pnLines = static_cast<int>(dfLines + 0.5);
1130 : }
1131 :
1132 417 : double dfPixelSizeX = dfPixelSize;
1133 417 : double dfPixelSizeY = dfPixelSize;
1134 :
1135 417 : const double adfRatioArray[] = {0.000, 0.001, 0.010, 0.100, 1.000};
1136 :
1137 : /* -------------------------------------------------------------------- */
1138 : /* Check that the right border is not completely out of source */
1139 : /* image. If so, adjust the x pixel size a bit in the hope it will */
1140 : /* fit. */
1141 : /* -------------------------------------------------------------------- */
1142 588 : for (const auto &dfRatio : adfRatioArray)
1143 : {
1144 580 : const double dfTryPixelSizeX =
1145 580 : dfPixelSizeX - dfPixelSizeX * dfRatio / *pnPixels;
1146 580 : double adfExtent[4] = {dfMinXOut, dfMaxYOut - (*pnLines) * dfPixelSizeY,
1147 580 : dfMinXOut + (*pnPixels) * dfTryPixelSizeX,
1148 580 : dfMaxYOut};
1149 580 : if (!GDALSuggestedWarpOutput2_MustAdjustForRightBorder(
1150 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1151 : dfTryPixelSizeX, dfPixelSizeY))
1152 : {
1153 409 : dfPixelSizeX = dfTryPixelSizeX;
1154 409 : break;
1155 : }
1156 : }
1157 :
1158 : /* -------------------------------------------------------------------- */
1159 : /* Check that the bottom border is not completely out of source */
1160 : /* image. If so, adjust the y pixel size a bit in the hope it will */
1161 : /* fit. */
1162 : /* -------------------------------------------------------------------- */
1163 497 : for (const auto &dfRatio : adfRatioArray)
1164 : {
1165 487 : const double dfTryPixelSizeY =
1166 487 : dfPixelSizeY - dfPixelSizeY * dfRatio / *pnLines;
1167 : double adfExtent[4] = {
1168 487 : dfMinXOut, dfMaxYOut - (*pnLines) * dfTryPixelSizeY,
1169 487 : dfMinXOut + (*pnPixels) * dfPixelSizeX, dfMaxYOut};
1170 487 : if (!GDALSuggestedWarpOutput2_MustAdjustForBottomBorder(
1171 : pfnTransformer, pTransformArg, adfExtent, *pnPixels, *pnLines,
1172 : dfPixelSizeX, dfTryPixelSizeY))
1173 : {
1174 407 : dfPixelSizeY = dfTryPixelSizeY;
1175 407 : break;
1176 : }
1177 : }
1178 :
1179 : /* -------------------------------------------------------------------- */
1180 : /* Recompute some bounds so that all return values are consistent */
1181 : /* -------------------------------------------------------------------- */
1182 417 : double dfMaxXOutNew = dfMinXOut + (*pnPixels) * dfPixelSizeX;
1183 417 : if (bIsGeographicCoordsDeg &&
1184 113 : ((dfMaxXOut <= 180 && dfMaxXOutNew > 180) || dfMaxXOut == 180))
1185 : {
1186 3 : dfMaxXOut = 180;
1187 3 : dfPixelSizeX = (dfMaxXOut - dfMinXOut) / *pnPixels;
1188 : }
1189 : else
1190 : {
1191 414 : dfMaxXOut = dfMaxXOutNew;
1192 : }
1193 :
1194 417 : double dfMinYOutNew = dfMaxYOut - (*pnLines) * dfPixelSizeY;
1195 417 : if (bIsGeographicCoordsDeg && dfMinYOut >= -90 && dfMinYOutNew < -90)
1196 : {
1197 0 : dfMinYOut = -90;
1198 0 : dfPixelSizeY = (dfMaxYOut - dfMinYOut) / *pnLines;
1199 : }
1200 : else
1201 : {
1202 417 : dfMinYOut = dfMinYOutNew;
1203 : }
1204 :
1205 : /* -------------------------------------------------------------------- */
1206 : /* Return raw extents. */
1207 : /* -------------------------------------------------------------------- */
1208 417 : padfExtent[0] = dfMinXOut;
1209 417 : padfExtent[1] = dfMinYOut;
1210 417 : padfExtent[2] = dfMaxXOut;
1211 417 : padfExtent[3] = dfMaxYOut;
1212 :
1213 : /* -------------------------------------------------------------------- */
1214 : /* Set the output geotransform. */
1215 : /* -------------------------------------------------------------------- */
1216 417 : padfGeoTransformOut[0] = dfMinXOut;
1217 417 : padfGeoTransformOut[1] = dfPixelSizeX;
1218 417 : padfGeoTransformOut[2] = 0.0;
1219 417 : padfGeoTransformOut[3] = dfMaxYOut;
1220 417 : padfGeoTransformOut[4] = 0.0;
1221 417 : padfGeoTransformOut[5] = -dfPixelSizeY;
1222 :
1223 417 : CPLFree(padfX);
1224 417 : CPLFree(padfXRevert);
1225 417 : CPLFree(pabSuccess);
1226 :
1227 417 : return CE_None;
1228 : }
1229 :
1230 : /************************************************************************/
1231 : /* GetCurrentCheckWithInvertPROJ() */
1232 : /************************************************************************/
1233 :
1234 3073 : static bool GetCurrentCheckWithInvertPROJ()
1235 : {
1236 3073 : return CPLTestBool(CPLGetConfigOption("CHECK_WITH_INVERT_PROJ", "NO"));
1237 : }
1238 :
1239 : /************************************************************************/
1240 : /* GDALCreateGenImgProjTransformerInternal() */
1241 : /************************************************************************/
1242 :
1243 : static void *GDALCreateSimilarGenImgProjTransformer(void *hTransformArg,
1244 : double dfRatioX,
1245 : double dfRatioY);
1246 :
1247 1900 : static GDALGenImgProjTransformInfo *GDALCreateGenImgProjTransformerInternal()
1248 : {
1249 : /* -------------------------------------------------------------------- */
1250 : /* Initialize the transform info. */
1251 : /* -------------------------------------------------------------------- */
1252 : GDALGenImgProjTransformInfo *psInfo =
1253 : static_cast<GDALGenImgProjTransformInfo *>(
1254 1900 : CPLCalloc(sizeof(GDALGenImgProjTransformInfo), 1));
1255 :
1256 1900 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
1257 : strlen(GDAL_GTI2_SIGNATURE));
1258 1900 : psInfo->sTI.pszClassName = GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME;
1259 1900 : psInfo->sTI.pfnTransform = GDALGenImgProjTransform;
1260 1900 : psInfo->sTI.pfnCleanup = GDALDestroyGenImgProjTransformer;
1261 1900 : psInfo->sTI.pfnSerialize = GDALSerializeGenImgProjTransformer;
1262 1900 : psInfo->sTI.pfnCreateSimilar = GDALCreateSimilarGenImgProjTransformer;
1263 :
1264 1900 : psInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1265 1900 : psInfo->bHasCustomTransformationPipeline = false;
1266 :
1267 1900 : return psInfo;
1268 : }
1269 :
1270 : /************************************************************************/
1271 : /* GDALCreateSimilarGenImgProjTransformer() */
1272 : /************************************************************************/
1273 :
1274 40 : static void *GDALCreateSimilarGenImgProjTransformer(void *hTransformArg,
1275 : double dfRatioX,
1276 : double dfRatioY)
1277 : {
1278 40 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarGenImgProjTransformer",
1279 : nullptr);
1280 :
1281 40 : GDALGenImgProjTransformInfo *psInfo =
1282 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
1283 :
1284 : GDALGenImgProjTransformInfo *psClonedInfo =
1285 40 : GDALCreateGenImgProjTransformerInternal();
1286 :
1287 40 : memcpy(psClonedInfo, psInfo, sizeof(GDALGenImgProjTransformInfo));
1288 :
1289 40 : psClonedInfo->bCheckWithInvertPROJ = GetCurrentCheckWithInvertPROJ();
1290 :
1291 40 : if (psClonedInfo->sSrcParams.pTransformArg)
1292 7 : psClonedInfo->sSrcParams.pTransformArg = GDALCreateSimilarTransformer(
1293 : psInfo->sSrcParams.pTransformArg, dfRatioX, dfRatioY);
1294 33 : else if (dfRatioX != 1.0 || dfRatioY != 1.0)
1295 : {
1296 10 : if (psClonedInfo->sSrcParams.adfGeoTransform[2] == 0.0 &&
1297 10 : psClonedInfo->sSrcParams.adfGeoTransform[4] == 0.0)
1298 : {
1299 10 : psClonedInfo->sSrcParams.adfGeoTransform[1] *= dfRatioX;
1300 10 : psClonedInfo->sSrcParams.adfGeoTransform[5] *= dfRatioY;
1301 : }
1302 : else
1303 : {
1304 : // If the x and y ratios are not equal, then we cannot really
1305 : // compute a geotransform.
1306 0 : psClonedInfo->sSrcParams.adfGeoTransform[1] *= dfRatioX;
1307 0 : psClonedInfo->sSrcParams.adfGeoTransform[2] *= dfRatioX;
1308 0 : psClonedInfo->sSrcParams.adfGeoTransform[4] *= dfRatioX;
1309 0 : psClonedInfo->sSrcParams.adfGeoTransform[5] *= dfRatioX;
1310 : }
1311 10 : if (!GDALInvGeoTransform(psClonedInfo->sSrcParams.adfGeoTransform,
1312 10 : psClonedInfo->sSrcParams.adfInvGeoTransform))
1313 : {
1314 0 : CPLError(CE_Failure, CPLE_AppDefined, "Cannot invert geotransform");
1315 0 : GDALDestroyGenImgProjTransformer(psClonedInfo);
1316 0 : return nullptr;
1317 : }
1318 : }
1319 :
1320 40 : if (psClonedInfo->pReprojectArg)
1321 19 : psClonedInfo->pReprojectArg =
1322 19 : GDALCloneTransformer(psInfo->pReprojectArg);
1323 :
1324 40 : if (psClonedInfo->sDstParams.pTransformArg)
1325 0 : psClonedInfo->sDstParams.pTransformArg =
1326 0 : GDALCloneTransformer(psInfo->sDstParams.pTransformArg);
1327 :
1328 40 : return psClonedInfo;
1329 : }
1330 :
1331 : /************************************************************************/
1332 : /* GDALCreateGenImgProjTransformer() */
1333 : /************************************************************************/
1334 :
1335 : /**
1336 : * Create image to image transformer.
1337 : *
1338 : * This function creates a transformation object that maps from pixel/line
1339 : * coordinates on one image to pixel/line coordinates on another image. The
1340 : * images may potentially be georeferenced in different coordinate systems,
1341 : * and may used GCPs to map between their pixel/line coordinates and
1342 : * georeferenced coordinates (as opposed to the default assumption that their
1343 : * geotransform should be used).
1344 : *
1345 : * This transformer potentially performs three concatenated transformations.
1346 : *
1347 : * The first stage is from source image pixel/line coordinates to source
1348 : * image georeferenced coordinates, and may be done using the geotransform,
1349 : * or if not defined using a polynomial model derived from GCPs. If GCPs
1350 : * are used this stage is accomplished using GDALGCPTransform().
1351 : *
1352 : * The second stage is to change projections from the source coordinate system
1353 : * to the destination coordinate system, assuming they differ. This is
1354 : * accomplished internally using GDALReprojectionTransform().
1355 : *
1356 : * The third stage is converting from destination image georeferenced
1357 : * coordinates to destination image coordinates. This is done using the
1358 : * destination image geotransform, or if not available, using a polynomial
1359 : * model derived from GCPs. If GCPs are used this stage is accomplished using
1360 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
1361 : * transformation is created.
1362 : *
1363 : * @param hSrcDS source dataset, or NULL.
1364 : * @param pszSrcWKT the coordinate system for the source dataset. If NULL,
1365 : * it will be read from the dataset itself.
1366 : * @param hDstDS destination dataset (or NULL).
1367 : * @param pszDstWKT the coordinate system for the destination dataset. If
1368 : * NULL, and hDstDS not NULL, it will be read from the destination dataset.
1369 : * @param bGCPUseOK TRUE if GCPs should be used if the geotransform is not
1370 : * available on the source dataset (not destination).
1371 : * @param dfGCPErrorThreshold ignored/deprecated.
1372 : * @param nOrder the maximum order to use for GCP derived polynomials if
1373 : * possible. Use 0 to autoselect, or -1 for thin plate splines.
1374 : *
1375 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
1376 : * deallocated with GDALDestroyGenImgProjTransformer().
1377 : */
1378 :
1379 62 : void *GDALCreateGenImgProjTransformer(GDALDatasetH hSrcDS,
1380 : const char *pszSrcWKT,
1381 : GDALDatasetH hDstDS,
1382 : const char *pszDstWKT, int bGCPUseOK,
1383 : CPL_UNUSED double dfGCPErrorThreshold,
1384 : int nOrder)
1385 : {
1386 62 : char **papszOptions = nullptr;
1387 :
1388 62 : if (pszSrcWKT != nullptr)
1389 3 : papszOptions = CSLSetNameValue(papszOptions, "SRC_SRS", pszSrcWKT);
1390 62 : if (pszDstWKT != nullptr)
1391 3 : papszOptions = CSLSetNameValue(papszOptions, "DST_SRS", pszDstWKT);
1392 62 : if (!bGCPUseOK)
1393 0 : papszOptions = CSLSetNameValue(papszOptions, "GCPS_OK", "FALSE");
1394 62 : if (nOrder != 0)
1395 0 : papszOptions = CSLSetNameValue(papszOptions, "MAX_GCP_ORDER",
1396 0 : CPLString().Printf("%d", nOrder));
1397 :
1398 62 : void *pRet = GDALCreateGenImgProjTransformer2(hSrcDS, hDstDS, papszOptions);
1399 62 : CSLDestroy(papszOptions);
1400 :
1401 62 : return pRet;
1402 : }
1403 :
1404 : /************************************************************************/
1405 : /* InsertCenterLong() */
1406 : /* */
1407 : /* Insert a CENTER_LONG Extension entry on a GEOGCS to indicate */
1408 : /* the center longitude of the dataset for wrapping purposes. */
1409 : /************************************************************************/
1410 :
1411 863 : static void InsertCenterLong(GDALDatasetH hDS, OGRSpatialReference *poSRS,
1412 : CPLStringList &aosOptions)
1413 :
1414 : {
1415 1488 : if (!poSRS->IsGeographic() || std::fabs(poSRS->GetAngularUnits() -
1416 625 : CPLAtof(SRS_UA_DEGREE_CONV)) > 1e-9)
1417 : {
1418 239 : return;
1419 : }
1420 :
1421 624 : if (poSRS->GetExtension(nullptr, "CENTER_LONG"))
1422 0 : return;
1423 :
1424 : /* -------------------------------------------------------------------- */
1425 : /* For now we only do this if we have a geotransform since */
1426 : /* other forms require a bunch of extra work. */
1427 : /* -------------------------------------------------------------------- */
1428 624 : double adfGeoTransform[6] = {};
1429 :
1430 624 : if (GDALGetGeoTransform(hDS, adfGeoTransform) != CE_None)
1431 0 : return;
1432 :
1433 : /* -------------------------------------------------------------------- */
1434 : /* Compute min/max longitude based on testing the four corners. */
1435 : /* -------------------------------------------------------------------- */
1436 624 : const int nXSize = GDALGetRasterXSize(hDS);
1437 624 : const int nYSize = GDALGetRasterYSize(hDS);
1438 :
1439 : const double dfMinLong =
1440 1248 : std::min(std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1441 624 : 0 * adfGeoTransform[2],
1442 1248 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1443 624 : 0 * adfGeoTransform[2]),
1444 1248 : std::min(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1445 624 : nYSize * adfGeoTransform[2],
1446 1248 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1447 624 : nYSize * adfGeoTransform[2]));
1448 : const double dfMaxLong =
1449 1248 : std::max(std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1450 624 : 0 * adfGeoTransform[2],
1451 1248 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1452 624 : 0 * adfGeoTransform[2]),
1453 1248 : std::max(adfGeoTransform[0] + 0 * adfGeoTransform[1] +
1454 624 : nYSize * adfGeoTransform[2],
1455 1248 : adfGeoTransform[0] + nXSize * adfGeoTransform[1] +
1456 624 : nYSize * adfGeoTransform[2]));
1457 :
1458 : const double dfEpsilon =
1459 624 : std::max(std::fabs(adfGeoTransform[1]), std::fabs(adfGeoTransform[2]));
1460 : // If the raster covers more than 360 degree (allow an extra pixel),
1461 : // give up
1462 624 : constexpr double RELATIVE_EPSILON = 0.05; // for numeric precision issues
1463 624 : if (dfMaxLong - dfMinLong > 360.0 + dfEpsilon * (1 + RELATIVE_EPSILON))
1464 0 : return;
1465 :
1466 : /* -------------------------------------------------------------------- */
1467 : /* Insert center long. */
1468 : /* -------------------------------------------------------------------- */
1469 624 : const double dfCenterLong = (dfMaxLong + dfMinLong) / 2.0;
1470 624 : aosOptions.SetNameValue("CENTER_LONG", CPLSPrintf("%g", dfCenterLong));
1471 : }
1472 :
1473 : /************************************************************************/
1474 : /* GDALComputeAreaOfInterest() */
1475 : /************************************************************************/
1476 :
1477 1193 : bool GDALComputeAreaOfInterest(const OGRSpatialReference *poSRS,
1478 : double adfGT[6], int nXSize, int nYSize,
1479 : double &dfWestLongitudeDeg,
1480 : double &dfSouthLatitudeDeg,
1481 : double &dfEastLongitudeDeg,
1482 : double &dfNorthLatitudeDeg)
1483 : {
1484 1193 : bool ret = false;
1485 :
1486 1193 : if (!poSRS)
1487 0 : return false;
1488 :
1489 1193 : OGRSpatialReference oSrcSRSHoriz(*poSRS);
1490 1193 : if (oSrcSRSHoriz.IsCompound())
1491 : {
1492 17 : oSrcSRSHoriz.StripVertical();
1493 : }
1494 :
1495 1193 : OGRSpatialReference *poGeog = oSrcSRSHoriz.CloneGeogCS();
1496 1193 : if (poGeog)
1497 : {
1498 1193 : poGeog->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
1499 1193 : poGeog->SetAngularUnits(SRS_UA_DEGREE, CPLAtof(SRS_UA_DEGREE_CONV));
1500 :
1501 1193 : auto poCT = OGRCreateCoordinateTransformation(&oSrcSRSHoriz, poGeog);
1502 1193 : if (poCT)
1503 : {
1504 1193 : poCT->SetEmitErrors(false);
1505 :
1506 : double x[4], y[4];
1507 1193 : x[0] = adfGT[0];
1508 1193 : y[0] = adfGT[3];
1509 1193 : x[1] = adfGT[0] + nXSize * adfGT[1];
1510 1193 : y[1] = adfGT[3];
1511 1193 : x[2] = adfGT[0];
1512 1193 : y[2] = adfGT[3] + nYSize * adfGT[5];
1513 1193 : x[3] = x[1];
1514 1193 : y[3] = y[2];
1515 1193 : int validity[4] = {false, false, false, false};
1516 1193 : poCT->Transform(4, x, y, nullptr, validity);
1517 1193 : dfWestLongitudeDeg = std::numeric_limits<double>::max();
1518 1193 : dfSouthLatitudeDeg = std::numeric_limits<double>::max();
1519 1193 : dfEastLongitudeDeg = -std::numeric_limits<double>::max();
1520 1193 : dfNorthLatitudeDeg = -std::numeric_limits<double>::max();
1521 5965 : for (int i = 0; i < 4; i++)
1522 : {
1523 4772 : if (validity[i])
1524 : {
1525 4756 : ret = true;
1526 4756 : dfWestLongitudeDeg = std::min(dfWestLongitudeDeg, x[i]);
1527 4756 : dfSouthLatitudeDeg = std::min(dfSouthLatitudeDeg, y[i]);
1528 4756 : dfEastLongitudeDeg = std::max(dfEastLongitudeDeg, x[i]);
1529 4756 : dfNorthLatitudeDeg = std::max(dfNorthLatitudeDeg, y[i]);
1530 : }
1531 : }
1532 1193 : if (validity[0] && validity[1] && x[0] > x[1])
1533 : {
1534 3 : dfWestLongitudeDeg = x[0];
1535 3 : dfEastLongitudeDeg = x[1];
1536 : }
1537 1193 : if (ret && std::fabs(dfWestLongitudeDeg) <= 180 &&
1538 1188 : std::fabs(dfEastLongitudeDeg) <= 180 &&
1539 1184 : std::fabs(dfSouthLatitudeDeg) <= 90 &&
1540 1180 : std::fabs(dfNorthLatitudeDeg) <= 90)
1541 : {
1542 1180 : CPLDebug("GDAL", "Computing area of interest: %g, %g, %g, %g",
1543 : dfWestLongitudeDeg, dfSouthLatitudeDeg,
1544 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
1545 : }
1546 : else
1547 : {
1548 13 : CPLDebug("GDAL", "Could not compute area of interest");
1549 13 : dfWestLongitudeDeg = 0;
1550 13 : dfSouthLatitudeDeg = 0;
1551 13 : dfEastLongitudeDeg = 0;
1552 13 : dfNorthLatitudeDeg = 0;
1553 : }
1554 1193 : OGRCoordinateTransformation::DestroyCT(poCT);
1555 : }
1556 :
1557 1193 : delete poGeog;
1558 : }
1559 :
1560 1193 : return ret;
1561 : }
1562 :
1563 5 : bool GDALComputeAreaOfInterest(const OGRSpatialReference *poSRS, double dfX1,
1564 : double dfY1, double dfX2, double dfY2,
1565 : double &dfWestLongitudeDeg,
1566 : double &dfSouthLatitudeDeg,
1567 : double &dfEastLongitudeDeg,
1568 : double &dfNorthLatitudeDeg)
1569 : {
1570 5 : bool ret = false;
1571 :
1572 5 : if (!poSRS)
1573 0 : return false;
1574 :
1575 5 : OGRSpatialReference oSrcSRSHoriz(*poSRS);
1576 5 : if (oSrcSRSHoriz.IsCompound())
1577 : {
1578 0 : oSrcSRSHoriz.StripVertical();
1579 : }
1580 :
1581 5 : OGRSpatialReference *poGeog = oSrcSRSHoriz.CloneGeogCS();
1582 5 : if (poGeog)
1583 : {
1584 5 : poGeog->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
1585 :
1586 5 : auto poCT = OGRCreateCoordinateTransformation(&oSrcSRSHoriz, poGeog);
1587 5 : if (poCT)
1588 : {
1589 : double x[4], y[4];
1590 5 : x[0] = dfX1;
1591 5 : y[0] = dfY1;
1592 5 : x[1] = dfX2;
1593 5 : y[1] = dfY1;
1594 5 : x[2] = dfX1;
1595 5 : y[2] = dfY2;
1596 5 : x[3] = dfX2;
1597 5 : y[3] = dfY2;
1598 5 : int validity[4] = {false, false, false, false};
1599 5 : poCT->Transform(4, x, y, nullptr, validity);
1600 5 : dfWestLongitudeDeg = std::numeric_limits<double>::max();
1601 5 : dfSouthLatitudeDeg = std::numeric_limits<double>::max();
1602 5 : dfEastLongitudeDeg = -std::numeric_limits<double>::max();
1603 5 : dfNorthLatitudeDeg = -std::numeric_limits<double>::max();
1604 25 : for (int i = 0; i < 4; i++)
1605 : {
1606 20 : if (validity[i])
1607 : {
1608 20 : ret = true;
1609 20 : dfWestLongitudeDeg = std::min(dfWestLongitudeDeg, x[i]);
1610 20 : dfSouthLatitudeDeg = std::min(dfSouthLatitudeDeg, y[i]);
1611 20 : dfEastLongitudeDeg = std::max(dfEastLongitudeDeg, x[i]);
1612 20 : dfNorthLatitudeDeg = std::max(dfNorthLatitudeDeg, y[i]);
1613 : }
1614 : }
1615 5 : if (validity[0] && validity[1] && (dfX1 - dfX2) * (x[0] - x[1]) < 0)
1616 : {
1617 0 : dfWestLongitudeDeg = x[0];
1618 0 : dfEastLongitudeDeg = x[1];
1619 : }
1620 5 : if (ret)
1621 : {
1622 5 : CPLDebug("GDAL", "Computing area of interest: %g, %g, %g, %g",
1623 : dfWestLongitudeDeg, dfSouthLatitudeDeg,
1624 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
1625 : }
1626 : else
1627 : {
1628 0 : CPLDebug("GDAL", "Could not compute area of interest");
1629 0 : dfWestLongitudeDeg = 0;
1630 0 : dfSouthLatitudeDeg = 0;
1631 0 : dfEastLongitudeDeg = 0;
1632 0 : dfNorthLatitudeDeg = 0;
1633 : }
1634 5 : delete poCT;
1635 : }
1636 :
1637 5 : delete poGeog;
1638 : }
1639 :
1640 5 : return ret;
1641 : }
1642 :
1643 : /************************************************************************/
1644 : /* GDALGCPAntimeridianUnwrap() */
1645 : /************************************************************************/
1646 :
1647 : /* Deal with discontinuties of dfGCPX longitudes around the anti-meridian.
1648 : * Cf https://github.com/OSGeo/gdal/issues/8371
1649 : */
1650 41 : static void GDALGCPAntimeridianUnwrap(int nGCPCount, GDAL_GCP *pasGCPList,
1651 : const OGRSpatialReference &oSRS,
1652 : CSLConstList papszOptions)
1653 : {
1654 : const char *pszGCPAntimeridianUnwrap =
1655 41 : CSLFetchNameValueDef(papszOptions, "GCP_ANTIMERIDIAN_UNWRAP", "AUTO");
1656 122 : const bool bForced = EQUAL(pszGCPAntimeridianUnwrap, "YES") ||
1657 40 : EQUAL(pszGCPAntimeridianUnwrap, "ON") ||
1658 121 : EQUAL(pszGCPAntimeridianUnwrap, "TRUE") ||
1659 40 : EQUAL(pszGCPAntimeridianUnwrap, "1");
1660 47 : if (bForced || (!oSRS.IsEmpty() && oSRS.IsGeographic() &&
1661 6 : fabs(oSRS.GetAngularUnits(nullptr) -
1662 6 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-8 &&
1663 6 : EQUAL(pszGCPAntimeridianUnwrap, "AUTO")))
1664 : {
1665 6 : if (!bForced)
1666 : {
1667 : // Proceed to unwrapping only if the longitudes are within
1668 : // [-180, -170] or [170, 180]
1669 425 : for (int i = 0; i < nGCPCount; ++i)
1670 : {
1671 423 : const double dfLongAbs = fabs(pasGCPList[i].dfGCPX);
1672 423 : if (dfLongAbs > 180 || dfLongAbs < 170)
1673 : {
1674 3 : return;
1675 : }
1676 : }
1677 : }
1678 :
1679 3 : bool bDone = false;
1680 633 : for (int i = 0; i < nGCPCount; ++i)
1681 : {
1682 630 : if (pasGCPList[i].dfGCPX < 0)
1683 : {
1684 48 : if (!bDone)
1685 : {
1686 3 : bDone = true;
1687 3 : CPLDebug("WARP", "GCP longitude unwrapping");
1688 : }
1689 48 : pasGCPList[i].dfGCPX += 360;
1690 : }
1691 : }
1692 : }
1693 : }
1694 :
1695 : /************************************************************************/
1696 : /* GDALGetGenImgProjTranformerOptionList() */
1697 : /************************************************************************/
1698 :
1699 : /** Return a XML string describing options accepted by
1700 : * GDALCreateGenImgProjTransformer2().
1701 : *
1702 : * @since 3.11
1703 : */
1704 1646 : const char *GDALGetGenImgProjTranformerOptionList(void)
1705 : {
1706 : return "<OptionList>"
1707 : "<Option name='SRC_SRS' type='string' description='WKT SRS, or any "
1708 : "string recognized by OGRSpatialReference::SetFromUserInput(), to "
1709 : "be used as an override for CRS of input dataset'/>"
1710 : "<Option name='DST_SRS' type='string' description='WKT SRS, or any "
1711 : "string recognized by OGRSpatialReference::SetFromUserInput(), to "
1712 : "be used as an override for CRS of output dataset'/>"
1713 : "<Option name='PROMOTE_TO_3D' type='boolean' description='"
1714 : "Whether to promote SRC_SRS / DST_SRS to 3D.' "
1715 : "default='NO'/>"
1716 : "<Option name='COORDINATE_OPERATION' type='string' description='"
1717 : "Coordinate operation, as a PROJ or WKT string, used as an override "
1718 : "over the normally computed pipeline. The pipeline must take into "
1719 : "account the axis order of the source and target SRS.'/>"
1720 : "<Option name='ALLOW_BALLPARK' type='boolean' description='"
1721 : "Whether ballpark coordinate operations are allowed.' "
1722 : "default='YES'/>"
1723 : "<Option name='ONLY_BEST' type='string-select' "
1724 : "description='"
1725 : "By default (at least in the PROJ 9.x series), PROJ may use "
1726 : "coordinate operations that are not the \"best\" if resources "
1727 : "(typically grids) needed to use them are missing. It will then "
1728 : "fallback to other coordinate operations that have a lesser "
1729 : "accuracy, for example using Helmert transformations, or in the "
1730 : "absence of such operations, to ones with potential very rough "
1731 : " accuracy, using \"ballpark\" transformations (see "
1732 : "https://proj.org/glossary.html). "
1733 : "When calling this method with YES, PROJ will only consider the "
1734 : "\"best\" operation, and error out (at Transform() time) if they "
1735 : "cannot be used. This method may be used together with "
1736 : "ALLOW_BALLPARK=NO to only allow best operations that have a known "
1737 : "accuracy. Note that this method has no effect on PROJ versions "
1738 : "before 9.2. The default value for this option can be also set with "
1739 : "the PROJ_ONLY_BEST_DEFAULT environment variable, or with the "
1740 : "\"only_best_default\" setting of proj.ini. Setting "
1741 : "ONLY_BEST=YES/NO overrides such default value' default='AUTO'>"
1742 : " <Value>AUTO</Value>"
1743 : " <Value>YES</Value>"
1744 : " <Value>NO</Value>"
1745 : "</Option>"
1746 : "<Option name='COORDINATE_EPOCH' type='float' description='"
1747 : "Coordinate epoch, expressed as a decimal year. Useful for "
1748 : "time-dependent coordinate operations.'/>"
1749 : "<Option name='SRC_COORDINATE_EPOCH' type='float' description='"
1750 : "Coordinate epoch of source CRS, expressed as a decimal year. "
1751 : "Useful for time-dependent coordinate operations.'/>"
1752 : "<Option name='DST_COORDINATE_EPOCH' type='float' description='"
1753 : "Coordinate epoch of target CRS, expressed as a decimal year. "
1754 : "Useful for time-dependent coordinate operations.'/>"
1755 : "<Option name='GCPS_OK' type='boolean' description='"
1756 : "Allow use of GCPs.' default='YES'/>"
1757 : "<Option name='REFINE_MINIMUM_GCPS' type='int' description='"
1758 : "The minimum amount of GCPs that should be available after the "
1759 : "refinement'/>"
1760 : "<Option name='REFINE_TOLERANCE' type='float' description='"
1761 : "The tolerance that specifies when a GCP will be eliminated.'/>"
1762 : "<Option name='MAX_GCP_ORDER' type='int' description='"
1763 : "The maximum order to use for GCP derived polynomials if possible. "
1764 : "The default is to autoselect based on the number of GCPs. A value "
1765 : "of -1 triggers use of Thin Plate Spline instead of polynomials.'/>"
1766 : "<Option name='GCP_ANTIMERIDIAN_UNWRAP' type='string-select' "
1767 : "description='"
1768 : "Whether to \"unwrap\" longitudes of ground control points that "
1769 : "span the antimeridian. For datasets with GCPs in "
1770 : "longitude/latitude coordinate space spanning the antimeridian, "
1771 : "longitudes will have a discontinuity on +/- 180 deg, and will "
1772 : "result in a subset of the GCPs with longitude in the [-180,-170] "
1773 : "range and another subset in [170, 180]. By default (AUTO), that "
1774 : "situation will be detected and longitudes in [-180,-170] will be "
1775 : "shifted to [180, 190] to get a continuous set. This option can be "
1776 : "set to YES to force that behavior (useful if no SRS information is "
1777 : "available), or to NO to disable it.' default='AUTO'>"
1778 : " <Value>AUTO</Value>"
1779 : " <Value>YES</Value>"
1780 : " <Value>NO</Value>"
1781 : "</Option>"
1782 : "<Option name='SRC_METHOD' alias='METHOD' type='string-select' "
1783 : "description='"
1784 : "Force only one geolocation method to be considered on the source "
1785 : "dataset. Will be used for pixel/line to georef transformation on "
1786 : "the source dataset. NO_GEOTRANSFORM can be used to specify the "
1787 : "identity geotransform (ungeoreferenced image)'>"
1788 : " <Value>GEOTRANSFORM</Value>"
1789 : " <Value>GCP_POLYNOMIAL</Value>"
1790 : " <Value>GCP_TPS</Value>"
1791 : " <Value>GCP_HOMOGRAPHY</Value>"
1792 : " <Value>GEOLOC_ARRAY</Value>"
1793 : " <Value>RPC</Value>"
1794 : " <Value>NO_GEOTRANSFORM</Value>"
1795 : "</Option>"
1796 : "<Option name='DST_METHOD' type='string-select' description='"
1797 : "Force only one geolocation method to be considered on the target "
1798 : "dataset. Will be used for pixel/line to georef transformation on "
1799 : "the targe dataset. NO_GEOTRANSFORM can be used to specify the "
1800 : "identity geotransform (ungeoreferenced image)'>"
1801 : " <Value>GEOTRANSFORM</Value>"
1802 : " <Value>GCP_POLYNOMIAL</Value>"
1803 : " <Value>GCP_TPS</Value>"
1804 : " <Value>GCP_HOMOGRAPHY</Value>"
1805 : " <Value>GEOLOC_ARRAY</Value>"
1806 : " <Value>RPC</Value>"
1807 : " <Value>NO_GEOTRANSFORM</Value>"
1808 : "</Option>"
1809 : "<Option name='RPC_HEIGHT' type='float' description='"
1810 : "A fixed height to be used with RPC calculations. If RPC_HEIGHT and "
1811 : "RPC_DEM are not specified but that the RPC metadata domain contains"
1812 : " a HEIGHT_DEFAULT item (for example, the DIMAP driver may fill it),"
1813 : "this value will be used as the RPC_HEIGHT. Otherwise, if none of "
1814 : "RPC_HEIGHT and RPC_DEM are specified as transformer options and "
1815 : "if HEIGHT_DEFAULT is no available, a height of 0 will be used.'/>"
1816 : "<Option name='RPC_DEM' type='string' description='"
1817 : "Name of a GDAL dataset (a DEM file typically) used to extract "
1818 : "elevation offsets from. In this situation the Z passed into the "
1819 : "transformation function is assumed to be height above ground. "
1820 : "This option should be used in replacement of RPC_HEIGHT to provide "
1821 : "a way of defining a non uniform ground for the target scene.'/>"
1822 : "<Option name='RPC_HEIGHT_SCALE' type='float' description='"
1823 : "Factor used to multiply heights above ground. Useful when "
1824 : "elevation offsets of the DEM are not expressed in meters.'/>"
1825 : "<Option name='RPC_DEMINTERPOLATION' type='string-select' "
1826 : "description='DEM interpolation method' default='BILINEAR'>"
1827 : " <Value>NEAR</Value>"
1828 : " <Value>BILINEAR</Value>"
1829 : " <Value>CUBIC</Value>"
1830 : "</Option>"
1831 : "<Option name='RPC_DEM_MISSING_VALUE' type='float' description='"
1832 : "Value of DEM height that must be used in case the DEM has nodata "
1833 : "value at the sampling point, or if its extent does not cover the "
1834 : "requested coordinate. When not specified, missing values will "
1835 : "cause a failed transform.'/>"
1836 : "<Option name='RPC_DEM_SRS' type='string' description='"
1837 : "WKT SRS, or any string recognized by "
1838 : "OGRSpatialReference::SetFromUserInput(), to be used as an "
1839 : "override for DEM SRS. Useful if DEM SRS does not have an explicit "
1840 : "vertical component.'/>"
1841 : "<Option name='RPC_DEM_APPLY_VDATUM_SHIFT' type='boolean' "
1842 : "description='"
1843 : "Whether the vertical component of a compound SRS for the DEM "
1844 : "should be used (when it is present). This is useful so as to "
1845 : "be able to transform the raw values from the DEM expressed with "
1846 : "respect to a geoid to the heights with respect to the WGS84 "
1847 : "ellipsoid. When this is enabled, the GTIFF_REPORT_COMPD_CS "
1848 : "configuration option will be also set temporarily so as to get "
1849 : "the vertical information from GeoTIFF files.' default='YES'/>"
1850 : "<Option name='RPC_PIXEL_ERROR_THRESHOLD' type='float' description='"
1851 : "Overrides the dfPixErrThreshold parameter, i.e. the error "
1852 : "(measured in pixels) allowed in the iterative solution of "
1853 : "pixel/line to lat/long computations (the other way is always "
1854 : "exact given the equations).'/>"
1855 : "<Option name='RPC_MAX_ITERATIONS' type='int' description='"
1856 : "Maximum number of iterations allowed in the iterative solution of "
1857 : "pixel/line to lat/long computations. Default value is 10 in the "
1858 : "absence of a DEM, or 20 if there is a DEM.'/>"
1859 : "<Option name='RPC_FOOTPRINT' type='string' description='"
1860 : "WKT or GeoJSON polygon (in long / lat coordinate space) with a "
1861 : "validity footprint for the RPC. Any coordinate transformation that "
1862 : "goes from or arrive outside this footprint will be considered "
1863 : "invalid. This* is useful in situations where the RPC values become "
1864 : "highly unstable outside of the area on which they have been "
1865 : "computed for, potentially leading to undesirable \"echoes\" / "
1866 : "false positives. This requires GDAL to be built against GEOS..'/>"
1867 : "<Option name='RPC_MAX_ITERATIONS' type='int' description='"
1868 : "Maximum number of iterations allowed in the iterative solution of "
1869 : "pixel/line to lat/long computations. Default value is 10 in the "
1870 : "absence of a DEM, or 20 if there is a DEM.'/>"
1871 : "<Option name='INSERT_CENTER_LONG' type='boolean' description='"
1872 : "May be set to FALSE to disable setting up a CENTER_LONG value on "
1873 : "the coordinate system to rewrap things around the center of the "
1874 : "image.' default='YES'/>"
1875 : "<Option name='SRC_APPROX_ERROR_IN_SRS_UNIT' type='float' "
1876 : "description='"
1877 : "Use an approximate transformer for the source transformer. Must be "
1878 : "defined together with SRC_APPROX_ERROR_IN_PIXEL to be taken into "
1879 : "account.'/>"
1880 : "<Option name='SRC_APPROX_ERROR_IN_PIXEL' type='float' "
1881 : "description='"
1882 : "Use an approximate transformer for the source transformer. Must be "
1883 : "defined together with SRC_APPROX_ERROR_IN_SRS_UNIT to be taken "
1884 : "into "
1885 : "account.'/>"
1886 : "<Option name='DST_APPROX_ERROR_IN_SRS_UNIT' type='float' "
1887 : "description='"
1888 : "Use an approximate transformer for the target transformer. Must be "
1889 : "defined together with DST_APPROX_ERROR_IN_PIXEL to be taken into "
1890 : "account.'/>"
1891 : "<Option name='DST_APPROX_ERROR_IN_PIXEL' type='float' "
1892 : "description='"
1893 : "Use an approximate transformer for the target transformer. Must be "
1894 : "defined together with DST_APPROX_ERROR_IN_SRS_UNIT to be taken "
1895 : "into "
1896 : "account.'/>"
1897 : "<Option name='REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT' "
1898 : "type='float' "
1899 : "description='"
1900 : "Use an approximate transformer for the coordinate reprojection. "
1901 : "Must be used together with "
1902 : "REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT to be taken into "
1903 : "account.'/>"
1904 : "<Option name='REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT' "
1905 : "type='float' "
1906 : "description='"
1907 : "Use an approximate transformer for the coordinate reprojection. "
1908 : "Must be used together with "
1909 : "REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT to be taken into "
1910 : "account.'/>"
1911 : "<Option name='AREA_OF_INTEREST' type='string' "
1912 : "description='"
1913 : "Area of interest, as "
1914 : "west_lon_deg,south_lat_deg,east_lon_deg,north_lat_deg, used to "
1915 : "compute the best coordinate operation between the source and "
1916 : "target SRS. If not specified, the bounding box of the source "
1917 : "raster will be used.'/>"
1918 : "<Option name='GEOLOC_BACKMAP_OVERSAMPLE_FACTOR' type='float' "
1919 : "min='0.1' max='2' description='"
1920 : "Oversample factor used to derive the size of the \"backmap\" used "
1921 : "for geolocation array transformers.' default='1.3'/>"
1922 : "<Option name='GEOLOC_USE_TEMP_DATASETS' type='boolean' "
1923 : "description='"
1924 : "Whether temporary GeoTIFF datasets should be used to store the "
1925 : "backmap. The default is NO, that is to use in-memory arrays, "
1926 : "unless the number of pixels of the geolocation array is greater "
1927 : "than 16 megapixels.' default='NO'/>"
1928 : "<Option name='GEOLOC_ARRAY' alias='SRC_GEOLOC_ARRAY' type='string' "
1929 : "description='"
1930 : "Name of a GDAL dataset containing a geolocation array and "
1931 : "associated metadata. This is an alternative to having geolocation "
1932 : "information described in the GEOLOCATION metadata domain of the "
1933 : "source dataset. The dataset specified may have a GEOLOCATION "
1934 : "metadata domain containing appropriate metadata, however default "
1935 : "values are assigned for all omitted items. X_BAND defaults to 1 "
1936 : "and Y_BAND to 2, however the dataset must contain exactly 2 bands. "
1937 : "PIXEL_OFFSET and LINE_OFFSET default to 0. PIXEL_STEP and "
1938 : "LINE_STEP default to the ratio of the width/height of the source "
1939 : "dataset divided by the with/height of the geolocation array. "
1940 : "SRS defaults to the spatial reference system of the geolocation "
1941 : "array dataset, if set, otherwise WGS84 is used. "
1942 : "GEOREFERENCING_CONVENTION is selected from the main metadata "
1943 : "domain if it is omitted from the GEOLOCATION domain, and if not "
1944 : "available TOP_LEFT_CORNER is assigned as a default. "
1945 : "If GEOLOC_ARRAY is set SRC_METHOD defaults to GEOLOC_ARRAY.'/>"
1946 : "<Option name='DST_GEOLOC_ARRAY' type='string' "
1947 : "description='"
1948 : "Name of a GDAL dataset that contains at least 2 bands with the X "
1949 : "and Y geolocation bands. This is an alternative to having "
1950 : "geolocation information described in the GEOLOCATION metadata "
1951 : "domain of the destination dataset. See SRC_GEOLOC_ARRAY "
1952 : "description for details, assumptions, and defaults. If this "
1953 : "option is set, DST_METHOD=GEOLOC_ARRAY will be assumed if not "
1954 : "set.'/>"
1955 : "<Option name='GEOLOC_NORMALIZE_LONGITUDE_MINUS_180_PLUS_180' "
1956 : "type='boolean' "
1957 : "description='"
1958 : "Force geolocation longitudes into -180,180 when longitude/latitude "
1959 : "is the coordinate system of the geolocation arrays' default='NO'>"
1960 : " <Value>YES</Value>"
1961 : " <Value>NO</Value>"
1962 : "</Option>"
1963 : "<Option name='NUM_THREADS' type='string' "
1964 : "description='Number of threads to use'/>"
1965 1646 : "</OptionList>";
1966 : }
1967 :
1968 : /************************************************************************/
1969 : /* GDALCreateGenImgProjTransformer2() */
1970 : /************************************************************************/
1971 :
1972 : /* clang-format off */
1973 : /**
1974 : * Create image to image transformer.
1975 : *
1976 : * This function creates a transformation object that maps from pixel/line
1977 : * coordinates on one image to pixel/line coordinates on another image. The
1978 : * images may potentially be georeferenced in different coordinate systems,
1979 : * and may used GCPs to map between their pixel/line coordinates and
1980 : * georeferenced coordinates (as opposed to the default assumption that their
1981 : * geotransform should be used).
1982 : *
1983 : * This transformer potentially performs three concatenated transformations.
1984 : *
1985 : * The first stage is from source image pixel/line coordinates to source
1986 : * image georeferenced coordinates, and may be done using the geotransform,
1987 : * or if not defined using a polynomial model derived from GCPs. If GCPs
1988 : * are used this stage is accomplished using GDALGCPTransform().
1989 : *
1990 : * The second stage is to change projections from the source coordinate system
1991 : * to the destination coordinate system, assuming they differ. This is
1992 : * accomplished internally using GDALReprojectionTransform().
1993 : *
1994 : * The third stage is converting from destination image georeferenced
1995 : * coordinates to destination image coordinates. This is done using the
1996 : * destination image geotransform, or if not available, using a polynomial
1997 : * model derived from GCPs. If GCPs are used this stage is accomplished using
1998 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
1999 : * transformation is created.
2000 : *
2001 : * Supported Options (specified with the -to switch of gdalwarp for example):
2002 : * <ul>
2003 : * <li> SRC_SRS: WKT SRS, or any string recognized by
2004 : * OGRSpatialReference::SetFromUserInput(), to be used as an override for
2005 : * hSrcDS.</li>
2006 : * <li> DST_SRS: WKT SRS, or any string recognized by
2007 : * OGRSpatialReference::SetFromUserInput(), to be used as an override for
2008 : * hDstDS.
2009 : * </li>
2010 : * <li>PROMOTE_TO_3D=YES/NO: whether to promote SRC_SRS / DST_SRS to 3D.
2011 : * Default is NO</li>
2012 : * <li> COORDINATE_OPERATION: (GDAL >= 3.0) Coordinate operation, as
2013 : * a PROJ or WKT string, used as an override over the normally computed
2014 : * pipeline. The pipeline must take into account the axis order of the source
2015 : * and target SRS.
2016 : * </li>
2017 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
2018 : * operations are allowed. Defaults to YES.</li>
2019 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
2020 : * PROJ 9.x series), PROJ may use coordinate
2021 : * operations that are not the "best" if resources (typically grids) needed
2022 : * to use them are missing. It will then fallback to other coordinate operations
2023 : * that have a lesser accuracy, for example using Helmert transformations,
2024 : * or in the absence of such operations, to ones with potential very rought
2025 : * accuracy, using "ballpark" transformations
2026 : * (see https://proj.org/glossary.html).
2027 : * When calling this method with YES, PROJ will only consider the
2028 : * "best" operation, and error out (at Transform() time) if they cannot be
2029 : * used.
2030 : * This method may be used together with ALLOW_BALLPARK=NO to
2031 : * only allow best operations that have a known accuracy.
2032 : * Note that this method has no effect on PROJ versions before 9.2.
2033 : * The default value for this option can be also set with the
2034 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
2035 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
2036 : * <li> COORDINATE_EPOCH: (GDAL >= 3.0) Coordinate epoch,
2037 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2038 : * </li>
2039 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
2040 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2041 : * </li>
2042 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of target CRS,
2043 : * expressed as a decimal year. Useful for time-dependent coordinate operations.
2044 : * </li>
2045 : * <li> GCPS_OK: If false, GCPs will not be used, default is TRUE.
2046 : * </li>
2047 : * <li> REFINE_MINIMUM_GCPS: The minimum amount of GCPs that should be available
2048 : * after the refinement.
2049 : * </li>
2050 : * <li> REFINE_TOLERANCE: The tolerance that specifies when a GCP will be
2051 : * eliminated.
2052 : * </li>
2053 : * <li> MAX_GCP_ORDER: the maximum order to use for GCP derived polynomials if
2054 : * possible. The default is to autoselect based on the number of GCPs.
2055 : * A value of -1 triggers use of Thin Plate Spline instead of polynomials.
2056 : * </li>
2057 : * <li>GCP_ANTIMERIDIAN_UNWRAP=AUTO/YES/NO. (GDAL >= 3.8) Whether to
2058 : * "unwrap" longitudes of ground control points that span the antimeridian.
2059 : * For datasets with GCPs in longitude/latitude coordinate space spanning the
2060 : * antimeridian, longitudes will have a discontinuity on +/- 180 deg, and
2061 : * will result in a subset of the GCPs with longitude in the [-180,-170] range
2062 : * and another subset in [170, 180]. By default (AUTO), that situation will be
2063 : * detected and longitudes in [-180,-170] will be shifted to [180, 190] to get
2064 : * a continuous set. This option can be set to YES to force that behavior
2065 : * (useful if no SRS information is available), or to NO to disable it.
2066 : * </li>
2067 : * <li> SRC_METHOD: may have a value which is one of GEOTRANSFORM, GCP_HOMOGRAPHY,
2068 : * GCP_POLYNOMIAL, GCP_TPS, GEOLOC_ARRAY, RPC to force only one geolocation
2069 : * method to be considered on the source dataset. Will be used for pixel/line
2070 : * to georef transformation on the source dataset. NO_GEOTRANSFORM can be
2071 : * used to specify the identity geotransform (ungeoreferenced image)
2072 : * </li>
2073 : * <li> DST_METHOD: may have a value which is one of GEOTRANSFORM,
2074 : * GCP_POLYNOMIAL, GCP_HOMOGRAPHY, GCP_TPS, GEOLOC_ARRAY (added in 3.5), RPC to
2075 : * force only one
2076 : * geolocation method to be considered on the target dataset. Will be used for
2077 : * pixel/line to georef transformation on the destination dataset.
2078 : * NO_GEOTRANSFORM can be used to specify the identity geotransform
2079 : * (ungeoreferenced image)
2080 : * </li>
2081 : * <li> RPC_HEIGHT: A fixed height to be used with RPC
2082 : * calculations. If RPC_HEIGHT and RPC_DEM are not specified but that the RPC
2083 : * metadata domain contains a HEIGHT_DEFAULT item (for example, the DIMAP driver
2084 : * may fill it), this value will be used as the RPC_HEIGHT. Otherwise, if none
2085 : * of RPC_HEIGHT and RPC_DEM are specified as transformer
2086 : * options and if HEIGHT_DEFAULT is no available, a height of 0 will be used.
2087 : * </li>
2088 : * <li> RPC_DEM: The name of a DEM file to be used with RPC
2089 : * calculations. See GDALCreateRPCTransformerV2() for more details.
2090 : * </li>
2091 : * <li> Other RPC related options. See GDALCreateRPCTransformerV2()
2092 : * </li>
2093 : * <li>
2094 : * INSERT_CENTER_LONG: May be set to FALSE to disable setting up a CENTER_LONG
2095 : * value on the coordinate system to rewrap things around the center of the
2096 : * image.
2097 : * </li>
2098 : * <li> SRC_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL
2099 : * >= 2.2) Use an approximate transformer for the source transformer. Must be
2100 : * defined together with SRC_APPROX_ERROR_IN_PIXEL to be taken into account.
2101 : * </li>
2102 : * <li> SRC_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use
2103 : * an approximate transformer for the source transformer.. Must be defined
2104 : * together with SRC_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2105 : * </li>
2106 : * <li>
2107 : * DST_APPROX_ERROR_IN_SRS_UNIT=err_threshold_in_SRS_units. (GDAL >= 2.2) Use
2108 : * an approximate transformer for the destination transformer. Must be defined
2109 : * together with DST_APPROX_ERROR_IN_PIXEL to be taken into account.
2110 : * </li>
2111 : * <li>
2112 : * DST_APPROX_ERROR_IN_PIXEL=err_threshold_in_pixel. (GDAL >= 2.2) Use an
2113 : * approximate transformer for the destination transformer. Must be defined
2114 : * together with DST_APPROX_ERROR_IN_SRS_UNIT to be taken into account.
2115 : * </li>
2116 : * <li>
2117 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT=err_threshold_in_src_SRS_units.
2118 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2119 : * reprojection. Must be used together with
2120 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT to be taken into account.
2121 : * </li>
2122 : * <li>
2123 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT=err_threshold_in_dst_SRS_units.
2124 : * (GDAL >= 2.2) Use an approximate transformer for the coordinate
2125 : * reprojection. Must be used together with
2126 : * REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT to be taken into account.
2127 : * </li>
2128 : * <li>
2129 : * AREA_OF_INTEREST=west_lon_deg,south_lat_deg,east_lon_deg,north_lat_deg. (GDAL
2130 : * >= 3.0) Area of interest, used to compute the best coordinate operation
2131 : * between the source and target SRS. If not specified, the bounding box of the
2132 : * source raster will be used.
2133 : * </li>
2134 : * <li> GEOLOC_BACKMAP_OVERSAMPLE_FACTOR=[0.1,2]. (GDAL >= 3.5) Oversample
2135 : * factor used to derive the size of the "backmap" used for geolocation array
2136 : * transformers. Default value is 1.3.
2137 : * </li>
2138 : * <li> GEOLOC_USE_TEMP_DATASETS=YES/NO.
2139 : * (GDAL >= 3.5) Whether temporary GeoTIFF datasets should be used to store
2140 : * the backmap. The default is NO, that is to use in-memory arrays, unless the
2141 : * number of pixels of the geolocation array is greater than 16 megapixels.
2142 : * </li>
2143 : * <li>
2144 : * GEOLOC_ARRAY/SRC_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a GDAL
2145 : * dataset containing a geolocation array and associated metadata. This is an
2146 : * alternative to having geolocation information described in the GEOLOCATION
2147 : * metadata domain of the source dataset. The dataset specified may have a
2148 : * GEOLOCATION metadata domain containing appropriate metadata, however default
2149 : * values are assigned for all omitted items. X_BAND defaults to 1 and Y_BAND to
2150 : * 2, however the dataset must contain exactly 2 bands. PIXEL_OFFSET and
2151 : * LINE_OFFSET default to 0. PIXEL_STEP and LINE_STEP default to the ratio of
2152 : * the width/height of the source dataset divided by the with/height of the
2153 : * geolocation array. SRS defaults to the geolocation array dataset's spatial
2154 : * reference system if set, otherwise WGS84 is used.
2155 : * GEOREFERENCING_CONVENTION is selected from the main metadata domain if it
2156 : * is omitted from the GEOLOCATION domain, and if not available
2157 : * TOP_LEFT_CORNER is assigned as a default.
2158 : * If GEOLOC_ARRAY is set SRC_METHOD
2159 : * defaults to GEOLOC_ARRAY.
2160 : * </li>
2161 : * <li>DST_GEOLOC_ARRAY=filename. (GDAL >= 3.5.2) Name of a
2162 : * GDAL dataset that contains at least 2 bands with the X and Y geolocation
2163 : * bands. This is an alternative to having geolocation information described in
2164 : * the GEOLOCATION metadata domain of the destination dataset. See
2165 : * SRC_GEOLOC_ARRAY description for details, assumptions, and defaults. If this
2166 : * option is set, DST_METHOD=GEOLOC_ARRAY will be assumed if not set.
2167 : * </li>
2168 : * <li>GEOLOC_NORMALIZE_LONGITUDE_MINUS_180_PLUS_180=YES/NO. (GDAL >= 3.12.0)
2169 : * Whether to force geolocation longitudes into -180,180 when longitude/latitude is
2170 : * the coordinate system of the geolocation arrays. The default is to enable this mode
2171 : * when the values in the geolocation array are in the -180,180, otherwise NO.
2172 : * </li>
2173 : * </ul>
2174 : *
2175 : * The use case for the *_APPROX_ERROR_* options is when defining an approximate
2176 : * transformer on top of the GenImgProjTransformer globally is not practical.
2177 : * Such a use case is when the source dataset has RPC with a RPC DEM. In such
2178 : * case we don't want to use the approximate transformer on the RPC
2179 : * transformation, as the RPC DEM generally involves non-linearities that the
2180 : * approximate transformer will not detect. In such case, we must a
2181 : * non-approximated GenImgProjTransformer, but it might be worthwhile to use
2182 : * approximate sub- transformers, for example on coordinate reprojection. For
2183 : * example if warping from a source dataset with RPC to a destination dataset
2184 : * with a UTM projection, since the inverse UTM transformation is rather costly.
2185 : * In which case, one can use the REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT and
2186 : * REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT options.
2187 : *
2188 : * The list of supported options can also be programmatically obtained with
2189 : * GDALGetGenImgProjTranformerOptionList().
2190 : *
2191 : * @param hSrcDS source dataset, or NULL.
2192 : * @param hDstDS destination dataset (or NULL).
2193 : * @param papszOptions NULL-terminated list of string options (or NULL).
2194 : *
2195 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2196 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2197 : */
2198 : /* clang-format on */
2199 :
2200 1645 : void *GDALCreateGenImgProjTransformer2(GDALDatasetH hSrcDS, GDALDatasetH hDstDS,
2201 : CSLConstList papszOptions)
2202 :
2203 : {
2204 1645 : GDALValidateOptions(GDALGetGenImgProjTranformerOptionList(), papszOptions,
2205 : "option", "transformer options");
2206 :
2207 1645 : double dfWestLongitudeDeg = 0.0;
2208 1645 : double dfSouthLatitudeDeg = 0.0;
2209 1645 : double dfEastLongitudeDeg = 0.0;
2210 1645 : double dfNorthLatitudeDeg = 0.0;
2211 1645 : bool bHasAreaOfInterest = false;
2212 1645 : if (const char *pszAreaOfInterest =
2213 1645 : CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST"))
2214 : {
2215 : const CPLStringList aosTokens(
2216 0 : CSLTokenizeString2(pszAreaOfInterest, ", ", 0));
2217 0 : if (aosTokens.size() == 4)
2218 : {
2219 0 : dfWestLongitudeDeg = CPLAtof(aosTokens[0]);
2220 0 : dfSouthLatitudeDeg = CPLAtof(aosTokens[1]);
2221 0 : dfEastLongitudeDeg = CPLAtof(aosTokens[2]);
2222 0 : dfNorthLatitudeDeg = CPLAtof(aosTokens[3]);
2223 0 : bHasAreaOfInterest = true;
2224 : }
2225 : }
2226 :
2227 1645 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
2228 :
2229 : const auto SetAxisMapping =
2230 3610 : [papszOptions](OGRSpatialReference &oSRS, const char *pszPrefix)
2231 : {
2232 1204 : const char *pszMapping = CSLFetchNameValue(
2233 2408 : papszOptions, std::string(pszPrefix)
2234 1204 : .append("_DATA_AXIS_TO_SRS_AXIS_MAPPING")
2235 : .c_str());
2236 1204 : if (pszMapping)
2237 : {
2238 4 : CPLStringList aosTokens(CSLTokenizeString2(pszMapping, ",", 0));
2239 4 : std::vector<int> anMapping;
2240 6 : for (int i = 0; i < aosTokens.size(); ++i)
2241 4 : anMapping.push_back(atoi(aosTokens[i]));
2242 2 : oSRS.SetDataAxisToSRSAxisMapping(anMapping);
2243 : }
2244 : else
2245 : {
2246 1202 : const char *pszStrategy = CSLFetchNameValueDef(
2247 : papszOptions,
2248 2404 : std::string(pszPrefix).append("_AXIS_MAPPING_STRATEGY").c_str(),
2249 : "TRADITIONAL_GIS_ORDER");
2250 1202 : if (EQUAL(pszStrategy, "TRADITIONAL_GIS_ORDER"))
2251 1201 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2252 1 : else if (EQUAL(pszStrategy, "AUTHORITY_COMPLIANT"))
2253 1 : oSRS.SetAxisMappingStrategy(OAMS_AUTHORITY_COMPLIANT);
2254 : else
2255 : {
2256 0 : CPLError(CE_Warning, CPLE_AppDefined,
2257 : "Unrecognized value '%s' for %s", pszStrategy,
2258 0 : std::string(pszPrefix)
2259 0 : .append("_AXIS_MAPPING_STRATEGY")
2260 : .c_str());
2261 0 : return false;
2262 : }
2263 : }
2264 1204 : return true;
2265 1645 : };
2266 :
2267 : /* -------------------------------------------------------------------- */
2268 : /* Initialize the transform info. */
2269 : /* -------------------------------------------------------------------- */
2270 : GDALGenImgProjTransformInfo *psInfo =
2271 1645 : GDALCreateGenImgProjTransformerInternal();
2272 :
2273 : const auto DealWithForwardOrInverse =
2274 3276 : [bHasAreaOfInterest, &dfWestLongitudeDeg, &dfSouthLatitudeDeg,
2275 : &dfEastLongitudeDeg, &dfNorthLatitudeDeg, pszCO, papszOptions,
2276 : &SetAxisMapping](GDALGenImgProjTransformPart &part, GDALDatasetH hDS,
2277 : const char *pszPrefix, OGRSpatialReference &oSRS,
2278 31841 : bool &bCanUseGeoTransform)
2279 : {
2280 : const int nOrder =
2281 3276 : atoi(CSLFetchNameValueDef(papszOptions, "MAX_GCP_ORDER", "0"));
2282 :
2283 : const bool bGCPUseOK =
2284 3276 : CPLTestBool(CSLFetchNameValueDef(papszOptions, "GCPS_OK", "YES"));
2285 3276 : const int nMinimumGcps = atoi(
2286 : CSLFetchNameValueDef(papszOptions, "REFINE_MINIMUM_GCPS", "-1"));
2287 :
2288 : const char *pszRefineTolerance =
2289 3276 : CSLFetchNameValue(papszOptions, "REFINE_TOLERANCE");
2290 3276 : const bool bRefine = pszRefineTolerance != nullptr;
2291 : const double dfTolerance =
2292 3276 : pszRefineTolerance ? CPLAtof(pszRefineTolerance) : 0.0;
2293 :
2294 : const std::string osSRSOptionName =
2295 9828 : std::string(pszPrefix).append("_SRS");
2296 : const char *pszSRS =
2297 3276 : CSLFetchNameValue(papszOptions, osSRSOptionName.c_str());
2298 3276 : if (pszSRS)
2299 : {
2300 2404 : if (pszSRS[0] != '\0' &&
2301 1200 : oSRS.SetFromUserInput(pszSRS) != OGRERR_NONE)
2302 : {
2303 0 : CPLError(CE_Failure, CPLE_AppDefined,
2304 : "Failed to import coordinate system `%s'.", pszSRS);
2305 0 : return false;
2306 : }
2307 1204 : if (!SetAxisMapping(oSRS, osSRSOptionName.c_str()))
2308 0 : return false;
2309 : }
2310 :
2311 3276 : CSLConstList papszMD = nullptr;
2312 : GDALRPCInfoV2 sRPCInfo;
2313 :
2314 3276 : bCanUseGeoTransform = false;
2315 :
2316 3276 : const char *pszMethod = CSLFetchNameValue(
2317 6552 : papszOptions, std::string(pszPrefix).append("_METHOD").c_str());
2318 3276 : if (!pszMethod && EQUAL(pszPrefix, "SRC"))
2319 1608 : pszMethod = CSLFetchNameValue(papszOptions, "METHOD");
2320 :
2321 3276 : const char *pszGeolocArray = CSLFetchNameValue(
2322 : papszOptions,
2323 6552 : std::string(pszPrefix).append("_GEOLOC_ARRAY").c_str());
2324 3276 : if (!pszGeolocArray && EQUAL(pszPrefix, "SRC"))
2325 1644 : pszGeolocArray = CSLFetchNameValue(papszOptions, "GEOLOC_ARRAY");
2326 3276 : if (!pszMethod && pszGeolocArray != nullptr)
2327 9 : pszMethod = "GEOLOC_ARRAY";
2328 :
2329 : /* -------------------------------------------------------------------- */
2330 : /* Get forward and inverse geotransform for the source image. */
2331 : /* -------------------------------------------------------------------- */
2332 3276 : if (hDS == nullptr ||
2333 91 : (pszMethod != nullptr && EQUAL(pszMethod, "NO_GEOTRANSFORM")))
2334 : {
2335 1322 : part.adfGeoTransform[0] = 0.0;
2336 1322 : part.adfGeoTransform[1] = 1.0;
2337 1322 : part.adfGeoTransform[2] = 0.0;
2338 1322 : part.adfGeoTransform[3] = 0.0;
2339 1322 : part.adfGeoTransform[4] = 0.0;
2340 1322 : part.adfGeoTransform[5] = 1.0;
2341 1322 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2342 : sizeof(double) * 6);
2343 : }
2344 3841 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOTRANSFORM")) &&
2345 1887 : GDALGetGeoTransform(hDS, part.adfGeoTransform) == CE_None)
2346 : {
2347 1807 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2348 1807 : part.adfInvGeoTransform))
2349 : {
2350 0 : CPLError(CE_Failure, CPLE_AppDefined,
2351 : "Cannot invert geotransform");
2352 0 : return false;
2353 : }
2354 1807 : if (pszSRS == nullptr)
2355 : {
2356 1629 : auto hSRS = GDALGetSpatialRef(hDS);
2357 1629 : if (hSRS)
2358 1314 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2359 : }
2360 1807 : if (EQUAL(pszPrefix, "SRC"))
2361 : {
2362 1390 : if (!bHasAreaOfInterest && pszCO == nullptr && !oSRS.IsEmpty())
2363 : {
2364 1177 : GDALComputeAreaOfInterest(
2365 1177 : &oSRS, part.adfGeoTransform, GDALGetRasterXSize(hDS),
2366 : GDALGetRasterYSize(hDS), dfWestLongitudeDeg,
2367 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2368 : dfNorthLatitudeDeg);
2369 : }
2370 1390 : bCanUseGeoTransform = true;
2371 : }
2372 : }
2373 147 : else if (bGCPUseOK &&
2374 80 : ((pszMethod == nullptr && GDALGetGCPCount(hDS) >= 4 &&
2375 147 : GDALGetGCPCount(hDS) < 6) ||
2376 67 : (pszMethod != nullptr &&
2377 295 : EQUAL(pszMethod, "GCP_HOMOGRAPHY"))) &&
2378 22 : GDALGetGCPCount(hDS) > 0)
2379 : {
2380 22 : if (pszSRS == nullptr)
2381 : {
2382 21 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2383 21 : if (hSRS)
2384 21 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2385 : }
2386 :
2387 22 : const auto nGCPCount = GDALGetGCPCount(hDS);
2388 22 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2389 22 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2390 : papszOptions);
2391 :
2392 22 : part.pTransformArg =
2393 22 : GDALCreateHomographyTransformerFromGCPs(nGCPCount, pasGCPList);
2394 :
2395 22 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2396 22 : CPLFree(pasGCPList);
2397 :
2398 22 : if (part.pTransformArg == nullptr)
2399 : {
2400 0 : return false;
2401 : }
2402 22 : part.pTransformer = GDALHomographyTransform;
2403 : }
2404 125 : else if (bGCPUseOK &&
2405 66 : (pszMethod == nullptr || EQUAL(pszMethod, "GCP_POLYNOMIAL")) &&
2406 250 : GDALGetGCPCount(hDS) > 0 && nOrder >= 0)
2407 : {
2408 8 : if (pszSRS == nullptr)
2409 : {
2410 8 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2411 8 : if (hSRS)
2412 8 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2413 : }
2414 :
2415 8 : const auto nGCPCount = GDALGetGCPCount(hDS);
2416 8 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2417 8 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2418 : papszOptions);
2419 :
2420 8 : if (bRefine)
2421 : {
2422 0 : part.pTransformArg = GDALCreateGCPRefineTransformer(
2423 : nGCPCount, pasGCPList, nOrder, FALSE, dfTolerance,
2424 : nMinimumGcps);
2425 : }
2426 : else
2427 : {
2428 8 : part.pTransformArg = GDALCreateGCPTransformer(
2429 : nGCPCount, pasGCPList, nOrder, FALSE);
2430 : }
2431 :
2432 8 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2433 8 : CPLFree(pasGCPList);
2434 :
2435 8 : if (part.pTransformArg == nullptr)
2436 : {
2437 0 : return false;
2438 : }
2439 8 : part.pTransformer = GDALGCPTransform;
2440 : }
2441 :
2442 128 : else if (bGCPUseOK && GDALGetGCPCount(hDS) > 0 && nOrder <= 0 &&
2443 11 : (pszMethod == nullptr || EQUAL(pszMethod, "GCP_TPS")))
2444 : {
2445 11 : if (pszSRS == nullptr)
2446 : {
2447 11 : auto hSRS = GDALGetGCPSpatialRef(hDS);
2448 11 : if (hSRS)
2449 10 : oSRS = *(OGRSpatialReference::FromHandle(hSRS));
2450 : }
2451 :
2452 11 : const auto nGCPCount = GDALGetGCPCount(hDS);
2453 11 : auto pasGCPList = GDALDuplicateGCPs(nGCPCount, GDALGetGCPs(hDS));
2454 11 : GDALGCPAntimeridianUnwrap(nGCPCount, pasGCPList, oSRS,
2455 : papszOptions);
2456 :
2457 11 : part.pTransformArg = GDALCreateTPSTransformerInt(
2458 : nGCPCount, pasGCPList, FALSE, papszOptions);
2459 :
2460 11 : GDALDeinitGCPs(nGCPCount, pasGCPList);
2461 11 : CPLFree(pasGCPList);
2462 :
2463 11 : if (part.pTransformArg == nullptr)
2464 : {
2465 2 : return false;
2466 : }
2467 9 : part.pTransformer = GDALTPSTransform;
2468 : }
2469 :
2470 52 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "RPC")) &&
2471 204 : (papszMD = GDALGetMetadata(hDS, "RPC")) != nullptr &&
2472 46 : GDALExtractRPCInfoV2(papszMD, &sRPCInfo))
2473 : {
2474 46 : CPLStringList aosOptions(papszOptions);
2475 87 : if (!CSLFetchNameValue(papszOptions, "RPC_HEIGHT") &&
2476 41 : !CSLFetchNameValue(papszOptions, "RPC_DEM"))
2477 : {
2478 8 : if (const char *pszHEIGHT_DEFAULT =
2479 8 : CSLFetchNameValue(papszMD, "HEIGHT_DEFAULT"))
2480 : {
2481 1 : CPLDebug("GDAL",
2482 : "For %s, using RPC_HEIGHT = HEIGHT_DEFAULT = %s",
2483 : pszPrefix, pszHEIGHT_DEFAULT);
2484 1 : aosOptions.SetNameValue("RPC_HEIGHT", pszHEIGHT_DEFAULT);
2485 : }
2486 : }
2487 46 : part.pTransformArg = GDALCreateRPCTransformerV2(&sRPCInfo, FALSE, 0,
2488 46 : aosOptions.List());
2489 46 : if (part.pTransformArg == nullptr)
2490 : {
2491 1 : return false;
2492 : }
2493 45 : part.pTransformer = GDALRPCTransform;
2494 45 : if (pszSRS == nullptr)
2495 : {
2496 45 : oSRS.SetFromUserInput(SRS_WKT_WGS84_LAT_LONG);
2497 45 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2498 : }
2499 : }
2500 :
2501 119 : else if ((pszMethod == nullptr || EQUAL(pszMethod, "GEOLOC_ARRAY")) &&
2502 59 : ((papszMD = GDALGetMetadata(hDS, "GEOLOCATION")) != nullptr ||
2503 : pszGeolocArray != nullptr))
2504 : {
2505 52 : CPLStringList aosGeolocMD; // keep in this scope
2506 52 : if (pszGeolocArray != nullptr)
2507 : {
2508 9 : if (papszMD != nullptr)
2509 : {
2510 0 : CPLError(
2511 : CE_Warning, CPLE_AppDefined,
2512 : "Both GEOLOCATION metadata domain on the source "
2513 : "dataset "
2514 : "and [%s_]GEOLOC_ARRAY transformer option are set. "
2515 : "Only using the later.",
2516 : pszPrefix);
2517 : }
2518 9 : aosGeolocMD = GDALCreateGeolocationMetadata(
2519 : hDS, pszGeolocArray,
2520 9 : /* bIsSource= */ EQUAL(pszPrefix, "SRC"));
2521 9 : if (aosGeolocMD.empty())
2522 : {
2523 3 : return false;
2524 : }
2525 6 : papszMD = aosGeolocMD.List();
2526 : }
2527 :
2528 49 : part.pTransformArg = GDALCreateGeoLocTransformerEx(
2529 : hDS, papszMD, FALSE, nullptr, papszOptions);
2530 49 : if (part.pTransformArg == nullptr)
2531 : {
2532 2 : return false;
2533 : }
2534 47 : part.pTransformer = GDALGeoLocTransform;
2535 47 : if (pszSRS == nullptr)
2536 : {
2537 47 : pszSRS = CSLFetchNameValue(papszMD, "SRS");
2538 47 : if (pszSRS)
2539 : {
2540 45 : oSRS.SetFromUserInput(pszSRS);
2541 45 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2542 : }
2543 : }
2544 : }
2545 :
2546 8 : else if (pszMethod != nullptr && EQUAL(pszPrefix, "SRC"))
2547 : {
2548 1 : CPLError(CE_Failure, CPLE_AppDefined,
2549 : "Unable to compute a %s based transformation between "
2550 : "pixel/line and georeferenced coordinates for %s.",
2551 : pszMethod, GDALGetDescription(hDS));
2552 :
2553 1 : return false;
2554 : }
2555 :
2556 : else
2557 : {
2558 7 : CPLError(CE_Failure, CPLE_AppDefined,
2559 : "Unable to compute a transformation between pixel/line "
2560 : "and georeferenced coordinates for %s. "
2561 : "There is no affine transformation and no GCPs. "
2562 : "Specify transformation option %s_METHOD=NO_GEOTRANSFORM "
2563 : "to bypass this check.",
2564 : GDALGetDescription(hDS), pszPrefix);
2565 :
2566 7 : return false;
2567 : }
2568 :
2569 : /* ---------------------------------------------------------------- */
2570 : /* Handle optional source approximation transformer. */
2571 : /* ---------------------------------------------------------------- */
2572 3260 : if (part.pTransformer)
2573 : {
2574 131 : const char *pszApproxErrorFwd = CSLFetchNameValue(
2575 262 : papszOptions, std::string(pszPrefix)
2576 131 : .append("_APPROX_ERROR_IN_SRS_UNIT")
2577 : .c_str());
2578 131 : const char *pszApproxErrorReverse = CSLFetchNameValue(
2579 262 : papszOptions, std::string(pszPrefix)
2580 131 : .append("_APPROX_ERROR_IN_PIXEL")
2581 : .c_str());
2582 131 : if (pszApproxErrorFwd && pszApproxErrorReverse)
2583 : {
2584 1 : void *pArg = GDALCreateApproxTransformer2(
2585 : part.pTransformer, part.pTransformArg,
2586 : CPLAtof(pszApproxErrorFwd), CPLAtof(pszApproxErrorReverse));
2587 1 : if (pArg == nullptr)
2588 : {
2589 0 : return false;
2590 : }
2591 1 : part.pTransformArg = pArg;
2592 1 : part.pTransformer = GDALApproxTransform;
2593 1 : GDALApproxTransformerOwnsSubtransformer(part.pTransformArg,
2594 : TRUE);
2595 : }
2596 : }
2597 :
2598 3260 : return true;
2599 1645 : };
2600 :
2601 : /* -------------------------------------------------------------------- */
2602 : /* Get forward and inverse geotransform for the source image. */
2603 : /* -------------------------------------------------------------------- */
2604 1645 : bool bCanUseSrcGeoTransform = false;
2605 3290 : OGRSpatialReference oSrcSRS;
2606 1645 : if (!DealWithForwardOrInverse(psInfo->sSrcParams, hSrcDS, "SRC", oSrcSRS,
2607 : bCanUseSrcGeoTransform))
2608 : {
2609 14 : GDALDestroyGenImgProjTransformer(psInfo);
2610 14 : return nullptr;
2611 : }
2612 :
2613 : /* -------------------------------------------------------------------- */
2614 : /* Get forward and inverse geotransform for destination image. */
2615 : /* If we have no destination use a unit transform. */
2616 : /* -------------------------------------------------------------------- */
2617 1631 : bool bIgnored = false;
2618 3262 : OGRSpatialReference oDstSRS;
2619 1631 : if (!DealWithForwardOrInverse(psInfo->sDstParams, hDstDS, "DST", oDstSRS,
2620 : bIgnored))
2621 : {
2622 2 : GDALDestroyGenImgProjTransformer(psInfo);
2623 2 : return nullptr;
2624 : }
2625 :
2626 : /* -------------------------------------------------------------------- */
2627 : /* Setup reprojection. */
2628 : /* -------------------------------------------------------------------- */
2629 :
2630 1629 : if (CPLFetchBool(papszOptions, "STRIP_VERT_CS", false))
2631 : {
2632 0 : if (oSrcSRS.IsCompound())
2633 : {
2634 0 : oSrcSRS.StripVertical();
2635 : }
2636 0 : if (oDstSRS.IsCompound())
2637 : {
2638 0 : oDstSRS.StripVertical();
2639 : }
2640 : }
2641 :
2642 : const bool bMayInsertCenterLong =
2643 2808 : (bCanUseSrcGeoTransform && !oSrcSRS.IsEmpty() && hSrcDS &&
2644 1179 : CPLFetchBool(papszOptions, "INSERT_CENTER_LONG", true));
2645 : const char *pszSrcCoordEpoch =
2646 1629 : CSLFetchNameValue(papszOptions, "SRC_COORDINATE_EPOCH");
2647 : const char *pszDstCoordEpoch =
2648 1629 : CSLFetchNameValue(papszOptions, "DST_COORDINATE_EPOCH");
2649 2973 : if ((!oSrcSRS.IsEmpty() && !oDstSRS.IsEmpty() &&
2650 1231 : (pszSrcCoordEpoch || pszDstCoordEpoch || !oSrcSRS.IsSame(&oDstSRS) ||
2651 2973 : (oSrcSRS.IsGeographic() && bMayInsertCenterLong))) ||
2652 : pszCO)
2653 : {
2654 880 : CPLStringList aosOptions;
2655 :
2656 880 : if (bMayInsertCenterLong)
2657 : {
2658 863 : InsertCenterLong(hSrcDS, &oSrcSRS, aosOptions);
2659 : }
2660 :
2661 880 : if (CPLFetchBool(papszOptions, "PROMOTE_TO_3D", false))
2662 : {
2663 19 : oSrcSRS.PromoteTo3D(nullptr);
2664 19 : oDstSRS.PromoteTo3D(nullptr);
2665 : }
2666 :
2667 880 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
2668 30 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
2669 : {
2670 : aosOptions.SetNameValue(
2671 : "AREA_OF_INTEREST",
2672 : CPLSPrintf("%.16g,%.16g,%.16g,%.16g", dfWestLongitudeDeg,
2673 : dfSouthLatitudeDeg, dfEastLongitudeDeg,
2674 850 : dfNorthLatitudeDeg));
2675 : }
2676 880 : if (pszCO)
2677 : {
2678 7 : aosOptions.SetNameValue("COORDINATE_OPERATION", pszCO);
2679 : }
2680 :
2681 : const char *pszCoordEpoch =
2682 880 : CSLFetchNameValue(papszOptions, "COORDINATE_EPOCH");
2683 880 : if (pszCoordEpoch)
2684 : {
2685 1 : aosOptions.SetNameValue("COORDINATE_EPOCH", pszCoordEpoch);
2686 : }
2687 :
2688 880 : if (pszSrcCoordEpoch)
2689 : {
2690 0 : aosOptions.SetNameValue("SRC_COORDINATE_EPOCH", pszSrcCoordEpoch);
2691 0 : oSrcSRS.SetCoordinateEpoch(CPLAtof(pszSrcCoordEpoch));
2692 : }
2693 :
2694 880 : if (pszDstCoordEpoch)
2695 : {
2696 0 : aosOptions.SetNameValue("DST_COORDINATE_EPOCH", pszDstCoordEpoch);
2697 0 : oDstSRS.SetCoordinateEpoch(CPLAtof(pszDstCoordEpoch));
2698 : }
2699 :
2700 880 : if (const char *pszAllowBallpark =
2701 880 : CSLFetchNameValue(papszOptions, "ALLOW_BALLPARK"))
2702 : {
2703 2 : aosOptions.SetNameValue("ALLOW_BALLPARK", pszAllowBallpark);
2704 : }
2705 :
2706 880 : if (const char *pszOnlyBest =
2707 880 : CSLFetchNameValue(papszOptions, "ONLY_BEST"))
2708 : {
2709 1 : aosOptions.SetNameValue("ONLY_BEST", pszOnlyBest);
2710 : }
2711 :
2712 884 : psInfo->pReprojectArg = GDALCreateReprojectionTransformerEx(
2713 880 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS)
2714 : : nullptr,
2715 880 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS)
2716 : : nullptr,
2717 880 : aosOptions.List());
2718 :
2719 880 : if (pszCO)
2720 : {
2721 7 : psInfo->bHasCustomTransformationPipeline = true;
2722 : }
2723 :
2724 880 : if (psInfo->pReprojectArg == nullptr)
2725 : {
2726 4 : GDALDestroyGenImgProjTransformer(psInfo);
2727 4 : return nullptr;
2728 : }
2729 876 : psInfo->pReproject = GDALReprojectionTransform;
2730 :
2731 : /* --------------------------------------------------------------------
2732 : */
2733 : /* Handle optional reprojection approximation transformer. */
2734 : /* --------------------------------------------------------------------
2735 : */
2736 876 : const char *psApproxErrorFwd = CSLFetchNameValue(
2737 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_DST_SRS_UNIT");
2738 876 : const char *psApproxErrorReverse = CSLFetchNameValue(
2739 : papszOptions, "REPROJECTION_APPROX_ERROR_IN_SRC_SRS_UNIT");
2740 876 : if (psApproxErrorFwd && psApproxErrorReverse)
2741 : {
2742 1 : void *pArg = GDALCreateApproxTransformer2(
2743 : psInfo->pReproject, psInfo->pReprojectArg,
2744 : CPLAtof(psApproxErrorFwd), CPLAtof(psApproxErrorReverse));
2745 1 : if (pArg == nullptr)
2746 : {
2747 0 : GDALDestroyGenImgProjTransformer(psInfo);
2748 0 : return nullptr;
2749 : }
2750 1 : psInfo->pReprojectArg = pArg;
2751 1 : psInfo->pReproject = GDALApproxTransform;
2752 1 : GDALApproxTransformerOwnsSubtransformer(psInfo->pReprojectArg,
2753 : TRUE);
2754 : }
2755 : }
2756 :
2757 1625 : return psInfo;
2758 : }
2759 :
2760 : /************************************************************************/
2761 : /* GDALRefreshGenImgProjTransformer() */
2762 : /************************************************************************/
2763 :
2764 1094 : void GDALRefreshGenImgProjTransformer(void *hTransformArg)
2765 : {
2766 1094 : GDALGenImgProjTransformInfo *psInfo =
2767 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
2768 :
2769 1839 : if (psInfo->pReprojectArg &&
2770 745 : psInfo->bCheckWithInvertPROJ != GetCurrentCheckWithInvertPROJ())
2771 : {
2772 68 : psInfo->bCheckWithInvertPROJ = !psInfo->bCheckWithInvertPROJ;
2773 :
2774 : CPLXMLNode *psXML =
2775 68 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
2776 68 : GDALDestroyTransformer(psInfo->pReprojectArg);
2777 68 : GDALDeserializeTransformer(psXML, &psInfo->pReproject,
2778 : &psInfo->pReprojectArg);
2779 68 : CPLDestroyXMLNode(psXML);
2780 : }
2781 1094 : }
2782 :
2783 : /************************************************************************/
2784 : /* GDALCreateGenImgProjTransformer3() */
2785 : /************************************************************************/
2786 :
2787 : /**
2788 : * Create image to image transformer.
2789 : *
2790 : * This function creates a transformation object that maps from pixel/line
2791 : * coordinates on one image to pixel/line coordinates on another image. The
2792 : * images may potentially be georeferenced in different coordinate systems,
2793 : * and may used GCPs to map between their pixel/line coordinates and
2794 : * georeferenced coordinates (as opposed to the default assumption that their
2795 : * geotransform should be used).
2796 : *
2797 : * This transformer potentially performs three concatenated transformations.
2798 : *
2799 : * The first stage is from source image pixel/line coordinates to source
2800 : * image georeferenced coordinates, and may be done using the geotransform,
2801 : * or if not defined using a polynomial model derived from GCPs. If GCPs
2802 : * are used this stage is accomplished using GDALGCPTransform().
2803 : *
2804 : * The second stage is to change projections from the source coordinate system
2805 : * to the destination coordinate system, assuming they differ. This is
2806 : * accomplished internally using GDALReprojectionTransform().
2807 : *
2808 : * The third stage is converting from destination image georeferenced
2809 : * coordinates to destination image coordinates. This is done using the
2810 : * destination image geotransform, or if not available, using a polynomial
2811 : * model derived from GCPs. If GCPs are used this stage is accomplished using
2812 : * GDALGCPTransform(). This stage is skipped if hDstDS is NULL when the
2813 : * transformation is created.
2814 : *
2815 : * @param pszSrcWKT source WKT (or NULL).
2816 : * @param padfSrcGeoTransform source geotransform (or NULL).
2817 : * @param pszDstWKT destination WKT (or NULL).
2818 : * @param padfDstGeoTransform destination geotransform (or NULL).
2819 : *
2820 : * @return handle suitable for use GDALGenImgProjTransform(), and to be
2821 : * deallocated with GDALDestroyGenImgProjTransformer() or NULL on failure.
2822 : */
2823 :
2824 0 : void *GDALCreateGenImgProjTransformer3(const char *pszSrcWKT,
2825 : const double *padfSrcGeoTransform,
2826 : const char *pszDstWKT,
2827 : const double *padfDstGeoTransform)
2828 :
2829 : {
2830 0 : OGRSpatialReference oSrcSRS;
2831 0 : if (pszSrcWKT)
2832 : {
2833 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2834 0 : if (pszSrcWKT[0] != '\0' &&
2835 0 : oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
2836 : {
2837 0 : CPLError(CE_Failure, CPLE_AppDefined,
2838 : "Failed to import coordinate system `%s'.", pszSrcWKT);
2839 0 : return nullptr;
2840 : }
2841 : }
2842 :
2843 0 : OGRSpatialReference oDstSRS;
2844 0 : if (pszDstWKT)
2845 : {
2846 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2847 0 : if (pszDstWKT[0] != '\0' &&
2848 0 : oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
2849 : {
2850 0 : CPLError(CE_Failure, CPLE_AppDefined,
2851 : "Failed to import coordinate system `%s'.", pszDstWKT);
2852 0 : return nullptr;
2853 : }
2854 : }
2855 0 : return GDALCreateGenImgProjTransformer4(
2856 : OGRSpatialReference::ToHandle(&oSrcSRS), padfSrcGeoTransform,
2857 0 : OGRSpatialReference::ToHandle(&oDstSRS), padfDstGeoTransform, nullptr);
2858 : }
2859 :
2860 : /************************************************************************/
2861 : /* GDALCreateGenImgProjTransformer4() */
2862 : /************************************************************************/
2863 :
2864 : /**
2865 : * Create image to image transformer.
2866 : *
2867 : * Similar to GDALCreateGenImgProjTransformer3(), except that it takes
2868 : * OGRSpatialReferenceH objects and options.
2869 : * The options are the ones supported by GDALCreateReprojectionTransformerEx()
2870 : *
2871 : * @since GDAL 3.0
2872 : */
2873 16 : void *GDALCreateGenImgProjTransformer4(OGRSpatialReferenceH hSrcSRS,
2874 : const double *padfSrcGeoTransform,
2875 : OGRSpatialReferenceH hDstSRS,
2876 : const double *padfDstGeoTransform,
2877 : const char *const *papszOptions)
2878 : {
2879 : /* -------------------------------------------------------------------- */
2880 : /* Initialize the transform info. */
2881 : /* -------------------------------------------------------------------- */
2882 : GDALGenImgProjTransformInfo *psInfo =
2883 16 : GDALCreateGenImgProjTransformerInternal();
2884 :
2885 : /* -------------------------------------------------------------------- */
2886 : /* Get forward and inverse geotransform for the source image. */
2887 : /* -------------------------------------------------------------------- */
2888 :
2889 : const auto SetParams =
2890 30 : [](GDALGenImgProjTransformPart &part, const double *padfGT)
2891 : {
2892 30 : if (padfGT)
2893 : {
2894 30 : memcpy(part.adfGeoTransform, padfGT, sizeof(part.adfGeoTransform));
2895 30 : if (!GDALInvGeoTransform(part.adfGeoTransform,
2896 30 : part.adfInvGeoTransform))
2897 : {
2898 2 : CPLError(CE_Failure, CPLE_AppDefined,
2899 : "Cannot invert geotransform");
2900 2 : return false;
2901 : }
2902 : }
2903 : else
2904 : {
2905 0 : part.adfGeoTransform[0] = 0.0;
2906 0 : part.adfGeoTransform[1] = 1.0;
2907 0 : part.adfGeoTransform[2] = 0.0;
2908 0 : part.adfGeoTransform[3] = 0.0;
2909 0 : part.adfGeoTransform[4] = 0.0;
2910 0 : part.adfGeoTransform[5] = 1.0;
2911 0 : memcpy(part.adfInvGeoTransform, part.adfGeoTransform,
2912 : sizeof(double) * 6);
2913 : }
2914 28 : return true;
2915 : };
2916 :
2917 16 : if (!SetParams(psInfo->sSrcParams, padfSrcGeoTransform))
2918 : {
2919 1 : GDALDestroyGenImgProjTransformer(psInfo);
2920 1 : return nullptr;
2921 : }
2922 :
2923 : /* -------------------------------------------------------------------- */
2924 : /* Setup reprojection. */
2925 : /* -------------------------------------------------------------------- */
2926 15 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
2927 15 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
2928 30 : if (!poSrcSRS->IsEmpty() && !poDstSRS->IsEmpty() &&
2929 15 : !poSrcSRS->IsSame(poDstSRS))
2930 : {
2931 4 : psInfo->pReprojectArg =
2932 4 : GDALCreateReprojectionTransformerEx(hSrcSRS, hDstSRS, papszOptions);
2933 4 : if (psInfo->pReprojectArg == nullptr)
2934 : {
2935 1 : GDALDestroyGenImgProjTransformer(psInfo);
2936 1 : return nullptr;
2937 : }
2938 3 : psInfo->pReproject = GDALReprojectionTransform;
2939 : }
2940 :
2941 : /* -------------------------------------------------------------------- */
2942 : /* Get forward and inverse geotransform for destination image. */
2943 : /* If we have no destination matrix use a unit transform. */
2944 : /* -------------------------------------------------------------------- */
2945 14 : if (!SetParams(psInfo->sDstParams, padfDstGeoTransform))
2946 : {
2947 1 : GDALDestroyGenImgProjTransformer(psInfo);
2948 1 : return nullptr;
2949 : }
2950 :
2951 13 : return psInfo;
2952 : }
2953 :
2954 : /************************************************************************/
2955 : /* GDALSetGenImgProjTransformerDstGeoTransform() */
2956 : /************************************************************************/
2957 :
2958 : /**
2959 : * Set GenImgProj output geotransform.
2960 : *
2961 : * Normally the "destination geotransform", or transformation between
2962 : * georeferenced output coordinates and pixel/line coordinates on the
2963 : * destination file is extracted from the destination file by
2964 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
2965 : * info. However, sometimes it is inconvenient to have an output file
2966 : * handle with appropriate geotransform information when creating the
2967 : * transformation. For these cases, this function can be used to apply
2968 : * the destination geotransform.
2969 : *
2970 : * @param hTransformArg the handle to update.
2971 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
2972 : */
2973 :
2974 875 : void GDALSetGenImgProjTransformerDstGeoTransform(void *hTransformArg,
2975 : const double *padfGeoTransform)
2976 :
2977 : {
2978 875 : VALIDATE_POINTER0(hTransformArg,
2979 : "GDALSetGenImgProjTransformerDstGeoTransform");
2980 :
2981 875 : GDALGenImgProjTransformInfo *psInfo =
2982 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
2983 :
2984 875 : memcpy(psInfo->sDstParams.adfGeoTransform, padfGeoTransform,
2985 : sizeof(double) * 6);
2986 875 : if (!GDALInvGeoTransform(psInfo->sDstParams.adfGeoTransform,
2987 875 : psInfo->sDstParams.adfInvGeoTransform))
2988 : {
2989 0 : CPLError(CE_Failure, CPLE_AppDefined, "Cannot invert geotransform");
2990 : }
2991 : }
2992 :
2993 : /************************************************************************/
2994 : /* GDALDestroyGenImgProjTransformer() */
2995 : /************************************************************************/
2996 :
2997 : /**
2998 : * GenImgProjTransformer deallocator.
2999 : *
3000 : * This function is used to deallocate the handle created with
3001 : * GDALCreateGenImgProjTransformer().
3002 : *
3003 : * @param hTransformArg the handle to deallocate.
3004 : */
3005 :
3006 1900 : void GDALDestroyGenImgProjTransformer(void *hTransformArg)
3007 :
3008 : {
3009 1900 : if (hTransformArg == nullptr)
3010 0 : return;
3011 :
3012 1900 : GDALGenImgProjTransformInfo *psInfo =
3013 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3014 :
3015 1900 : if (psInfo->sSrcParams.pTransformArg != nullptr)
3016 147 : GDALDestroyTransformer(psInfo->sSrcParams.pTransformArg);
3017 :
3018 1900 : if (psInfo->sDstParams.pTransformArg != nullptr)
3019 7 : GDALDestroyTransformer(psInfo->sDstParams.pTransformArg);
3020 :
3021 1900 : if (psInfo->pReprojectArg != nullptr)
3022 996 : GDALDestroyTransformer(psInfo->pReprojectArg);
3023 :
3024 1900 : CPLFree(psInfo);
3025 : }
3026 :
3027 : /************************************************************************/
3028 : /* GDALGenImgProjTransform() */
3029 : /************************************************************************/
3030 :
3031 : /**
3032 : * Perform general image reprojection transformation.
3033 : *
3034 : * Actually performs the transformation setup in
3035 : * GDALCreateGenImgProjTransformer(). This function matches the signature
3036 : * required by the GDALTransformerFunc(), and more details on the arguments
3037 : * can be found in that topic.
3038 : */
3039 :
3040 : #ifdef DEBUG_APPROX_TRANSFORMER
3041 : int countGDALGenImgProjTransform = 0;
3042 : #endif
3043 :
3044 2163140 : int GDALGenImgProjTransform(void *pTransformArgIn, int bDstToSrc,
3045 : int nPointCount, double *padfX, double *padfY,
3046 : double *padfZ, int *panSuccess)
3047 : {
3048 2163140 : GDALGenImgProjTransformInfo *psInfo =
3049 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArgIn);
3050 :
3051 : #ifdef DEBUG_APPROX_TRANSFORMER
3052 : CPLAssert(nPointCount > 0);
3053 : countGDALGenImgProjTransform += nPointCount;
3054 : #endif
3055 :
3056 19851500 : for (int i = 0; i < nPointCount; i++)
3057 : {
3058 17688400 : panSuccess[i] = (padfX[i] != HUGE_VAL && padfY[i] != HUGE_VAL);
3059 : }
3060 :
3061 2163140 : int ret = TRUE;
3062 :
3063 : /* -------------------------------------------------------------------- */
3064 : /* Convert from src (dst) pixel/line to src (dst) */
3065 : /* georeferenced coordinates. */
3066 : /* -------------------------------------------------------------------- */
3067 : {
3068 2163140 : const auto params = bDstToSrc ? psInfo->sDstParams : psInfo->sSrcParams;
3069 2163140 : const double *padfGeoTransform = params.adfGeoTransform;
3070 2163140 : void *pTransformArg = params.pTransformArg;
3071 2163140 : GDALTransformerFunc pTransformer = params.pTransformer;
3072 :
3073 2163140 : if (pTransformArg != nullptr)
3074 : {
3075 41619 : if (!pTransformer(pTransformArg, FALSE, nPointCount, padfX, padfY,
3076 : padfZ, panSuccess))
3077 1773 : ret = FALSE;
3078 : }
3079 : else
3080 : {
3081 19730200 : for (int i = 0; i < nPointCount; i++)
3082 : {
3083 17608700 : if (!panSuccess[i])
3084 2008 : continue;
3085 :
3086 17606600 : const double dfNewX = padfGeoTransform[0] +
3087 17606600 : padfX[i] * padfGeoTransform[1] +
3088 17606600 : padfY[i] * padfGeoTransform[2];
3089 17606600 : const double dfNewY = padfGeoTransform[3] +
3090 17606600 : padfX[i] * padfGeoTransform[4] +
3091 17606600 : padfY[i] * padfGeoTransform[5];
3092 :
3093 17606600 : padfX[i] = dfNewX;
3094 17606600 : padfY[i] = dfNewY;
3095 : }
3096 : }
3097 : }
3098 :
3099 : /* -------------------------------------------------------------------- */
3100 : /* Reproject if needed. */
3101 : /* -------------------------------------------------------------------- */
3102 2163140 : if (psInfo->pReprojectArg)
3103 : {
3104 1812830 : if (!psInfo->pReproject(psInfo->pReprojectArg, bDstToSrc, nPointCount,
3105 : padfX, padfY, padfZ, panSuccess))
3106 20196 : ret = FALSE;
3107 : }
3108 :
3109 : /* -------------------------------------------------------------------- */
3110 : /* Convert dst (src) georef coordinates back to pixel/line. */
3111 : /* -------------------------------------------------------------------- */
3112 : {
3113 2163140 : const auto params = bDstToSrc ? psInfo->sSrcParams : psInfo->sDstParams;
3114 2163140 : const double *padfInvGeoTransform = params.adfInvGeoTransform;
3115 2163140 : void *pTransformArg = params.pTransformArg;
3116 2163140 : GDALTransformerFunc pTransformer = params.pTransformer;
3117 :
3118 2163140 : if (pTransformArg != nullptr)
3119 : {
3120 51490 : if (!pTransformer(pTransformArg, TRUE, nPointCount, padfX, padfY,
3121 : padfZ, panSuccess))
3122 1648 : ret = FALSE;
3123 : }
3124 : else
3125 : {
3126 18946000 : for (int i = 0; i < nPointCount; i++)
3127 : {
3128 16834400 : if (!panSuccess[i])
3129 3555620 : continue;
3130 :
3131 13278800 : const double dfNewX = padfInvGeoTransform[0] +
3132 13278800 : padfX[i] * padfInvGeoTransform[1] +
3133 13278800 : padfY[i] * padfInvGeoTransform[2];
3134 13278800 : const double dfNewY = padfInvGeoTransform[3] +
3135 13278800 : padfX[i] * padfInvGeoTransform[4] +
3136 13278800 : padfY[i] * padfInvGeoTransform[5];
3137 :
3138 13278800 : padfX[i] = dfNewX;
3139 13278800 : padfY[i] = dfNewY;
3140 : }
3141 : }
3142 : }
3143 :
3144 2163140 : return ret;
3145 : }
3146 :
3147 : /************************************************************************/
3148 : /* GDALTransformLonLatToDestGenImgProjTransformer() */
3149 : /************************************************************************/
3150 :
3151 2752 : int GDALTransformLonLatToDestGenImgProjTransformer(void *hTransformArg,
3152 : double *pdfX, double *pdfY)
3153 : {
3154 2752 : GDALGenImgProjTransformInfo *psInfo =
3155 : static_cast<GDALGenImgProjTransformInfo *>(hTransformArg);
3156 :
3157 2752 : if (psInfo->pReprojectArg == nullptr ||
3158 1564 : psInfo->pReproject != GDALReprojectionTransform)
3159 1192 : return false;
3160 :
3161 1560 : GDALReprojectionTransformInfo *psReprojInfo =
3162 : static_cast<GDALReprojectionTransformInfo *>(psInfo->pReprojectArg);
3163 3120 : if (psReprojInfo->poForwardTransform == nullptr ||
3164 1560 : psReprojInfo->poForwardTransform->GetSourceCS() == nullptr)
3165 2 : return false;
3166 :
3167 1558 : double z = 0;
3168 1558 : int success = true;
3169 1558 : auto poSourceCRS = psReprojInfo->poForwardTransform->GetSourceCS();
3170 2730 : if (poSourceCRS->IsGeographic() &&
3171 1172 : std::fabs(poSourceCRS->GetAngularUnits() -
3172 1172 : CPLAtof(SRS_UA_DEGREE_CONV)) < 1e-9)
3173 : {
3174 : // Optimization to avoid creating a OGRCoordinateTransformation
3175 1170 : OGRAxisOrientation eSourceFirstAxisOrient = OAO_Other;
3176 1170 : poSourceCRS->GetAxis(nullptr, 0, &eSourceFirstAxisOrient);
3177 1170 : const auto &mapping = poSourceCRS->GetDataAxisToSRSAxisMapping();
3178 2340 : if ((mapping[0] == 2 && eSourceFirstAxisOrient == OAO_East) ||
3179 1170 : (mapping[0] == 1 && eSourceFirstAxisOrient != OAO_East))
3180 : {
3181 6 : std::swap(*pdfX, *pdfY);
3182 : }
3183 : }
3184 : else
3185 : {
3186 : auto poLongLat =
3187 388 : std::unique_ptr<OGRSpatialReference>(poSourceCRS->CloneGeogCS());
3188 388 : if (poLongLat == nullptr)
3189 0 : return false;
3190 388 : poLongLat->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3191 :
3192 : const bool bCurrentCheckWithInvertProj =
3193 388 : GetCurrentCheckWithInvertPROJ();
3194 388 : if (!bCurrentCheckWithInvertProj)
3195 388 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", "YES");
3196 : auto poCT = std::unique_ptr<OGRCoordinateTransformation>(
3197 388 : OGRCreateCoordinateTransformation(poLongLat.get(), poSourceCRS));
3198 388 : if (!bCurrentCheckWithInvertProj)
3199 388 : CPLSetThreadLocalConfigOption("CHECK_WITH_INVERT_PROJ", nullptr);
3200 388 : if (poCT == nullptr)
3201 0 : return false;
3202 :
3203 388 : poCT->SetEmitErrors(false);
3204 388 : if (!poCT->Transform(1, pdfX, pdfY))
3205 2 : return false;
3206 :
3207 386 : if (!psInfo->pReproject(psInfo->pReprojectArg, false, 1, pdfX, pdfY, &z,
3208 628 : &success) ||
3209 242 : !success)
3210 : {
3211 144 : return false;
3212 : }
3213 : }
3214 :
3215 1412 : double *padfGeoTransform = psInfo->sDstParams.adfInvGeoTransform;
3216 1412 : void *pTransformArg = psInfo->sDstParams.pTransformArg;
3217 1412 : GDALTransformerFunc pTransformer = psInfo->sDstParams.pTransformer;
3218 1412 : if (pTransformArg != nullptr)
3219 : {
3220 4 : if (!pTransformer(pTransformArg, TRUE, 1, pdfX, pdfY, &z, &success) ||
3221 0 : !success)
3222 : {
3223 4 : return false;
3224 : }
3225 : }
3226 : else
3227 : {
3228 1408 : const double dfNewX = padfGeoTransform[0] +
3229 1408 : pdfX[0] * padfGeoTransform[1] +
3230 1408 : pdfY[0] * padfGeoTransform[2];
3231 1408 : const double dfNewY = padfGeoTransform[3] +
3232 1408 : pdfX[0] * padfGeoTransform[4] +
3233 1408 : pdfY[0] * padfGeoTransform[5];
3234 :
3235 1408 : pdfX[0] = dfNewX;
3236 1408 : pdfY[0] = dfNewY;
3237 : }
3238 :
3239 1408 : return true;
3240 : }
3241 :
3242 : /************************************************************************/
3243 : /* GDALSerializeGenImgProjTransformer() */
3244 : /************************************************************************/
3245 :
3246 78 : static CPLXMLNode *GDALSerializeGenImgProjTransformer(void *pTransformArg)
3247 :
3248 : {
3249 78 : GDALGenImgProjTransformInfo *psInfo =
3250 : static_cast<GDALGenImgProjTransformInfo *>(pTransformArg);
3251 :
3252 : CPLXMLNode *psTree =
3253 78 : CPLCreateXMLNode(nullptr, CXT_Element, "GenImgProjTransformer");
3254 :
3255 : const auto SerializePart =
3256 455 : [psTree](const char *pszPrefix, const GDALGenImgProjTransformPart &part)
3257 : {
3258 156 : char szWork[200] = {};
3259 :
3260 : /* ------------------------------------------------------------- */
3261 : /* Handle transformation. */
3262 : /* ------------------------------------------------------------- */
3263 156 : if (part.pTransformArg != nullptr)
3264 : {
3265 : CPLXMLNode *psTransformer =
3266 13 : GDALSerializeTransformer(part.pTransformer, part.pTransformArg);
3267 13 : if (psTransformer != nullptr)
3268 : {
3269 13 : CPLXMLNode *psTransformerContainer = CPLCreateXMLNode(
3270 : psTree, CXT_Element,
3271 : CPLSPrintf("%s%s", pszPrefix, psTransformer->pszValue));
3272 :
3273 13 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3274 : }
3275 : }
3276 :
3277 : /* ------------------------------------------------------------- */
3278 : /* Handle geotransforms. */
3279 : /* ------------------------------------------------------------- */
3280 : else
3281 : {
3282 143 : CPLsnprintf(szWork, sizeof(szWork),
3283 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3284 143 : part.adfGeoTransform[0], part.adfGeoTransform[1],
3285 143 : part.adfGeoTransform[2], part.adfGeoTransform[3],
3286 143 : part.adfGeoTransform[4], part.adfGeoTransform[5]);
3287 143 : CPLCreateXMLElementAndValue(
3288 : psTree, CPLSPrintf("%sGeoTransform", pszPrefix), szWork);
3289 :
3290 143 : CPLsnprintf(szWork, sizeof(szWork),
3291 : "%.17g,%.17g,%.17g,%.17g,%.17g,%.17g",
3292 143 : part.adfInvGeoTransform[0], part.adfInvGeoTransform[1],
3293 143 : part.adfInvGeoTransform[2], part.adfInvGeoTransform[3],
3294 143 : part.adfInvGeoTransform[4], part.adfInvGeoTransform[5]);
3295 143 : CPLCreateXMLElementAndValue(
3296 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix), szWork);
3297 : }
3298 156 : };
3299 :
3300 78 : SerializePart("Src", psInfo->sSrcParams);
3301 78 : SerializePart("Dst", psInfo->sDstParams);
3302 :
3303 : /* -------------------------------------------------------------------- */
3304 : /* Do we have a reprojection transformer? */
3305 : /* -------------------------------------------------------------------- */
3306 78 : if (psInfo->pReprojectArg != nullptr)
3307 : {
3308 :
3309 : CPLXMLNode *psTransformerContainer =
3310 51 : CPLCreateXMLNode(psTree, CXT_Element, "ReprojectTransformer");
3311 :
3312 : CPLXMLNode *psTransformer =
3313 51 : GDALSerializeTransformer(psInfo->pReproject, psInfo->pReprojectArg);
3314 51 : if (psTransformer != nullptr)
3315 51 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3316 : }
3317 :
3318 78 : return psTree;
3319 : }
3320 :
3321 : /************************************************************************/
3322 : /* GDALDeserializeGeoTransform() */
3323 : /************************************************************************/
3324 :
3325 739 : static void GDALDeserializeGeoTransform(const char *pszGT,
3326 : double adfGeoTransform[6])
3327 : {
3328 739 : CPLsscanf(pszGT, "%lf,%lf,%lf,%lf,%lf,%lf", adfGeoTransform + 0,
3329 : adfGeoTransform + 1, adfGeoTransform + 2, adfGeoTransform + 3,
3330 : adfGeoTransform + 4, adfGeoTransform + 5);
3331 739 : }
3332 :
3333 : /************************************************************************/
3334 : /* GDALDeserializeGenImgProjTransformer() */
3335 : /************************************************************************/
3336 :
3337 199 : void *GDALDeserializeGenImgProjTransformer(CPLXMLNode *psTree)
3338 :
3339 : {
3340 : /* -------------------------------------------------------------------- */
3341 : /* Initialize the transform info. */
3342 : /* -------------------------------------------------------------------- */
3343 : GDALGenImgProjTransformInfo *psInfo =
3344 199 : GDALCreateGenImgProjTransformerInternal();
3345 :
3346 : const auto DeserializePart =
3347 1194 : [psTree](const char *pszPrefix, GDALGenImgProjTransformPart &part)
3348 : {
3349 : /* ----------------------------------------------------------------- */
3350 : /* Geotransform */
3351 : /* ----------------------------------------------------------------- */
3352 398 : if (const auto psGTNode =
3353 398 : CPLGetXMLNode(psTree, CPLSPrintf("%sGeoTransform", pszPrefix)))
3354 : {
3355 382 : GDALDeserializeGeoTransform(CPLGetXMLValue(psGTNode, "", ""),
3356 382 : part.adfGeoTransform);
3357 :
3358 382 : if (const auto psInvGTNode = CPLGetXMLNode(
3359 : psTree, CPLSPrintf("%sInvGeoTransform", pszPrefix)))
3360 : {
3361 357 : GDALDeserializeGeoTransform(CPLGetXMLValue(psInvGTNode, "", ""),
3362 357 : part.adfInvGeoTransform);
3363 : }
3364 : else
3365 : {
3366 25 : if (!GDALInvGeoTransform(part.adfGeoTransform,
3367 25 : part.adfInvGeoTransform))
3368 : {
3369 0 : CPLError(CE_Failure, CPLE_AppDefined,
3370 : "Cannot invert geotransform");
3371 : }
3372 : }
3373 : }
3374 :
3375 : /* ---------------------------------------------------------------- */
3376 : /* Transform */
3377 : /* ---------------------------------------------------------------- */
3378 : else
3379 : {
3380 16 : for (CPLXMLNode *psIter = psTree->psChild; psIter != nullptr;
3381 0 : psIter = psIter->psNext)
3382 : {
3383 16 : if (psIter->eType == CXT_Element &&
3384 16 : STARTS_WITH_CI(psIter->pszValue, pszPrefix))
3385 : {
3386 16 : GDALDeserializeTransformer(psIter->psChild,
3387 : &part.pTransformer,
3388 : &part.pTransformArg);
3389 16 : break;
3390 : }
3391 : }
3392 : }
3393 597 : };
3394 :
3395 199 : DeserializePart("Src", psInfo->sSrcParams);
3396 199 : DeserializePart("Dst", psInfo->sDstParams);
3397 :
3398 : /* -------------------------------------------------------------------- */
3399 : /* Reproject transformer */
3400 : /* -------------------------------------------------------------------- */
3401 199 : CPLXMLNode *psSubtree = CPLGetXMLNode(psTree, "ReprojectTransformer");
3402 199 : if (psSubtree != nullptr && psSubtree->psChild != nullptr)
3403 : {
3404 98 : GDALDeserializeTransformer(psSubtree->psChild, &psInfo->pReproject,
3405 : &psInfo->pReprojectArg);
3406 : }
3407 :
3408 199 : return psInfo;
3409 : }
3410 :
3411 : /************************************************************************/
3412 : /* GDALCreateReprojectionTransformer() */
3413 : /************************************************************************/
3414 :
3415 : /**
3416 : * Create reprojection transformer.
3417 : *
3418 : * Creates a callback data structure suitable for use with
3419 : * GDALReprojectionTransformation() to represent a transformation from
3420 : * one geographic or projected coordinate system to another. On input
3421 : * the coordinate systems are described in OpenGIS WKT format.
3422 : *
3423 : * Internally the OGRCoordinateTransformation object is used to implement
3424 : * the reprojection.
3425 : *
3426 : * @param pszSrcWKT the coordinate system for the source coordinate system.
3427 : * @param pszDstWKT the coordinate system for the destination coordinate
3428 : * system.
3429 : *
3430 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3431 : * system fails to initialize the reprojection.
3432 : **/
3433 :
3434 0 : void *GDALCreateReprojectionTransformer(const char *pszSrcWKT,
3435 : const char *pszDstWKT)
3436 :
3437 : {
3438 : /* -------------------------------------------------------------------- */
3439 : /* Ingest the SRS definitions. */
3440 : /* -------------------------------------------------------------------- */
3441 0 : OGRSpatialReference oSrcSRS;
3442 0 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3443 0 : if (oSrcSRS.importFromWkt(pszSrcWKT) != OGRERR_NONE)
3444 : {
3445 0 : CPLError(CE_Failure, CPLE_AppDefined,
3446 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3447 0 : return nullptr;
3448 : }
3449 :
3450 0 : OGRSpatialReference oDstSRS;
3451 0 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3452 0 : if (oDstSRS.importFromWkt(pszDstWKT) != OGRERR_NONE)
3453 : {
3454 0 : CPLError(CE_Failure, CPLE_AppDefined,
3455 : "Failed to import coordinate system `%s'.", pszSrcWKT);
3456 0 : return nullptr;
3457 : }
3458 :
3459 0 : return GDALCreateReprojectionTransformerEx(
3460 : OGRSpatialReference::ToHandle(&oSrcSRS),
3461 0 : OGRSpatialReference::ToHandle(&oDstSRS), nullptr);
3462 : }
3463 :
3464 : /************************************************************************/
3465 : /* GDALCreateReprojectionTransformerEx() */
3466 : /************************************************************************/
3467 :
3468 : /**
3469 : * Create reprojection transformer.
3470 : *
3471 : * Creates a callback data structure suitable for use with
3472 : * GDALReprojectionTransformation() to represent a transformation from
3473 : * one geographic or projected coordinate system to another.
3474 : *
3475 : * Internally the OGRCoordinateTransformation object is used to implement
3476 : * the reprojection.
3477 : *
3478 : * @param hSrcSRS the coordinate system for the source coordinate system.
3479 : * @param hDstSRS the coordinate system for the destination coordinate
3480 : * system.
3481 : * @param papszOptions NULL-terminated list of options, or NULL. Currently
3482 : * supported options are:
3483 : * <ul>
3484 : * <li>AREA_OF_INTEREST=west_long,south_lat,east_long,north_lat: Values in
3485 : * degrees. longitudes in [-180,180], latitudes in [-90,90].</li>
3486 : * <li>COORDINATE_OPERATION=string: PROJ or WKT string representing a
3487 : * coordinate operation, overriding the default computed transformation.</li>
3488 : * <li>COORDINATE_EPOCH=decimal_year: Coordinate epoch, expressed as a
3489 : * decimal year. Useful for time-dependent coordinate operations.</li>
3490 : * <li> SRC_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch of source CRS,
3491 : * expressed as a decimal year. Useful for time-dependent coordinate
3492 : *operations.</li>
3493 : * <li> DST_COORDINATE_EPOCH: (GDAL >= 3.4) Coordinate epoch
3494 : *of target CRS, expressed as a decimal year. Useful for time-dependent
3495 : *coordinate operations.</li>
3496 : * <li> ALLOW_BALLPARK=YES/NO: (GDAL >= 3.11) Whether ballpark coordinate
3497 : * operations are allowed. Defaults to YES.</li>
3498 : * <li> ONLY_BEST=YES/NO/AUTO: (GDAL >= 3.11) By default (at least in the
3499 : * PROJ 9.x series), PROJ may use coordinate
3500 : * operations that are not the "best" if resources (typically grids) needed
3501 : * to use them are missing. It will then fallback to other coordinate operations
3502 : * that have a lesser accuracy, for example using Helmert transformations,
3503 : * or in the absence of such operations, to ones with potential very rought
3504 : * accuracy, using "ballpark" transformations
3505 : * (see https://proj.org/glossary.html).
3506 : * When calling this method with YES, PROJ will only consider the
3507 : * "best" operation, and error out (at Transform() time) if they cannot be
3508 : * used.
3509 : * This method may be used together with ALLOW_BALLPARK=NO to
3510 : * only allow best operations that have a known accuracy.
3511 : * Note that this method has no effect on PROJ versions before 9.2.
3512 : * The default value for this option can be also set with the
3513 : * PROJ_ONLY_BEST_DEFAULT environment variable, or with the "only_best_default"
3514 : * setting of proj.ini. Calling SetOnlyBest() overrides such default value.</li>
3515 : * </ul>
3516 : *
3517 : * @return Handle for use with GDALReprojectionTransform(), or NULL if the
3518 : * system fails to initialize the reprojection.
3519 : *
3520 : * @since GDAL 3.0
3521 : **/
3522 :
3523 1069 : void *GDALCreateReprojectionTransformerEx(OGRSpatialReferenceH hSrcSRS,
3524 : OGRSpatialReferenceH hDstSRS,
3525 : const char *const *papszOptions)
3526 : {
3527 1069 : OGRSpatialReference *poSrcSRS = OGRSpatialReference::FromHandle(hSrcSRS);
3528 1069 : OGRSpatialReference *poDstSRS = OGRSpatialReference::FromHandle(hDstSRS);
3529 :
3530 : /* -------------------------------------------------------------------- */
3531 : /* Build the forward coordinate transformation. */
3532 : /* -------------------------------------------------------------------- */
3533 1069 : double dfWestLongitudeDeg = 0.0;
3534 1069 : double dfSouthLatitudeDeg = 0.0;
3535 1069 : double dfEastLongitudeDeg = 0.0;
3536 1069 : double dfNorthLatitudeDeg = 0.0;
3537 1069 : const char *pszBBOX = CSLFetchNameValue(papszOptions, "AREA_OF_INTEREST");
3538 1069 : if (pszBBOX)
3539 : {
3540 1002 : char **papszTokens = CSLTokenizeString2(pszBBOX, ",", 0);
3541 1002 : if (CSLCount(papszTokens) == 4)
3542 : {
3543 1002 : dfWestLongitudeDeg = CPLAtof(papszTokens[0]);
3544 1002 : dfSouthLatitudeDeg = CPLAtof(papszTokens[1]);
3545 1002 : dfEastLongitudeDeg = CPLAtof(papszTokens[2]);
3546 1002 : dfNorthLatitudeDeg = CPLAtof(papszTokens[3]);
3547 : }
3548 1002 : CSLDestroy(papszTokens);
3549 : }
3550 1069 : const char *pszCO = CSLFetchNameValue(papszOptions, "COORDINATE_OPERATION");
3551 :
3552 2138 : OGRCoordinateTransformationOptions optionsFwd;
3553 1069 : if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
3554 : dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
3555 : {
3556 1002 : optionsFwd.SetAreaOfInterest(dfWestLongitudeDeg, dfSouthLatitudeDeg,
3557 : dfEastLongitudeDeg, dfNorthLatitudeDeg);
3558 : }
3559 1069 : if (pszCO)
3560 : {
3561 7 : optionsFwd.SetCoordinateOperation(pszCO, false);
3562 : }
3563 :
3564 1069 : const char *pszCENTER_LONG = CSLFetchNameValue(papszOptions, "CENTER_LONG");
3565 1069 : if (pszCENTER_LONG)
3566 : {
3567 703 : optionsFwd.SetSourceCenterLong(CPLAtof(pszCENTER_LONG));
3568 : }
3569 :
3570 1069 : optionsFwd.SetBallparkAllowed(CPLTestBool(
3571 : CSLFetchNameValueDef(papszOptions, "ALLOW_BALLPARK", "YES")));
3572 :
3573 : const char *pszOnlyBest =
3574 1069 : CSLFetchNameValueDef(papszOptions, "ONLY_BEST", "AUTO");
3575 1069 : if (!EQUAL(pszOnlyBest, "AUTO"))
3576 : {
3577 1 : optionsFwd.SetOnlyBest(CPLTestBool(pszOnlyBest));
3578 : }
3579 :
3580 : OGRCoordinateTransformation *poForwardTransform =
3581 1069 : OGRCreateCoordinateTransformation(poSrcSRS, poDstSRS, optionsFwd);
3582 :
3583 1069 : if (poForwardTransform == nullptr)
3584 : // OGRCreateCoordinateTransformation() will report errors on its own.
3585 5 : return nullptr;
3586 :
3587 1064 : poForwardTransform->SetEmitErrors(false);
3588 :
3589 : /* -------------------------------------------------------------------- */
3590 : /* Create a structure to hold the transform info, and also */
3591 : /* build reverse transform. We assume that if the forward */
3592 : /* transform can be created, then so can the reverse one. */
3593 : /* -------------------------------------------------------------------- */
3594 1064 : GDALReprojectionTransformInfo *psInfo = new GDALReprojectionTransformInfo();
3595 :
3596 1064 : psInfo->papszOptions = CSLDuplicate(papszOptions);
3597 1064 : psInfo->poForwardTransform = poForwardTransform;
3598 1064 : psInfo->dfTime = CPLAtof(CSLFetchNameValueDef(
3599 : papszOptions, "COORDINATE_EPOCH",
3600 : CSLFetchNameValueDef(
3601 : papszOptions, "DST_COORDINATE_EPOCH",
3602 : CSLFetchNameValueDef(papszOptions, "SRC_COORDINATE_EPOCH", "0"))));
3603 1064 : psInfo->poReverseTransform = poForwardTransform->GetInverse();
3604 :
3605 1064 : if (psInfo->poReverseTransform)
3606 1064 : psInfo->poReverseTransform->SetEmitErrors(false);
3607 :
3608 1064 : memcpy(psInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
3609 : strlen(GDAL_GTI2_SIGNATURE));
3610 1064 : psInfo->sTI.pszClassName = GDAL_REPROJECTION_TRANSFORMER_CLASS_NAME;
3611 1064 : psInfo->sTI.pfnTransform = GDALReprojectionTransform;
3612 1064 : psInfo->sTI.pfnCleanup = GDALDestroyReprojectionTransformer;
3613 1064 : psInfo->sTI.pfnSerialize = GDALSerializeReprojectionTransformer;
3614 :
3615 1064 : return psInfo;
3616 : }
3617 :
3618 : /************************************************************************/
3619 : /* GDALDestroyReprojectionTransformer() */
3620 : /************************************************************************/
3621 :
3622 : /**
3623 : * Destroy reprojection transformation.
3624 : *
3625 : * @param pTransformArg the transformation handle returned by
3626 : * GDALCreateReprojectionTransformer().
3627 : */
3628 :
3629 1064 : void GDALDestroyReprojectionTransformer(void *pTransformArg)
3630 :
3631 : {
3632 1064 : if (pTransformArg == nullptr)
3633 0 : return;
3634 :
3635 1064 : GDALReprojectionTransformInfo *psInfo =
3636 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3637 :
3638 1064 : if (psInfo->poForwardTransform)
3639 1064 : OGRCoordinateTransformation::DestroyCT(psInfo->poForwardTransform);
3640 :
3641 1064 : if (psInfo->poReverseTransform)
3642 1064 : OGRCoordinateTransformation::DestroyCT(psInfo->poReverseTransform);
3643 :
3644 1064 : CSLDestroy(psInfo->papszOptions);
3645 :
3646 1064 : delete psInfo;
3647 : }
3648 :
3649 : /************************************************************************/
3650 : /* GDALReprojectionTransform() */
3651 : /************************************************************************/
3652 :
3653 : /**
3654 : * Perform reprojection transformation.
3655 : *
3656 : * Actually performs the reprojection transformation described in
3657 : * GDALCreateReprojectionTransformer(). This function matches the
3658 : * GDALTransformerFunc() signature. Details of the arguments are described
3659 : * there.
3660 : */
3661 :
3662 1813210 : int GDALReprojectionTransform(void *pTransformArg, int bDstToSrc,
3663 : int nPointCount, double *padfX, double *padfY,
3664 : double *padfZ, int *panSuccess)
3665 :
3666 : {
3667 1813210 : GDALReprojectionTransformInfo *psInfo =
3668 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3669 : int bSuccess;
3670 :
3671 1813210 : std::vector<double> adfTime;
3672 1813200 : double *padfT = nullptr;
3673 1813200 : if (psInfo->dfTime != 0.0 && nPointCount > 0)
3674 : {
3675 1 : adfTime.resize(nPointCount, psInfo->dfTime);
3676 1 : padfT = &adfTime[0];
3677 : }
3678 :
3679 1813200 : if (bDstToSrc)
3680 : {
3681 1562390 : if (psInfo->poReverseTransform == nullptr)
3682 : {
3683 0 : CPLError(
3684 : CE_Failure, CPLE_AppDefined,
3685 : "Inverse coordinate transformation cannot be instantiated");
3686 0 : if (panSuccess)
3687 : {
3688 0 : for (int i = 0; i < nPointCount; i++)
3689 0 : panSuccess[i] = FALSE;
3690 : }
3691 0 : bSuccess = false;
3692 : }
3693 : else
3694 : {
3695 1562400 : bSuccess = psInfo->poReverseTransform->Transform(
3696 1562390 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3697 : }
3698 : }
3699 : else
3700 250810 : bSuccess = psInfo->poForwardTransform->Transform(
3701 250810 : nPointCount, padfX, padfY, padfZ, padfT, panSuccess);
3702 :
3703 3626420 : return bSuccess;
3704 : }
3705 :
3706 : /************************************************************************/
3707 : /* GDALSerializeReprojectionTransformer() */
3708 : /************************************************************************/
3709 :
3710 138 : static CPLXMLNode *GDALSerializeReprojectionTransformer(void *pTransformArg)
3711 :
3712 : {
3713 : CPLXMLNode *psTree;
3714 138 : GDALReprojectionTransformInfo *psInfo =
3715 : static_cast<GDALReprojectionTransformInfo *>(pTransformArg);
3716 :
3717 138 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ReprojectionTransformer");
3718 :
3719 : /* -------------------------------------------------------------------- */
3720 : /* Handle SourceCS. */
3721 : /* -------------------------------------------------------------------- */
3722 276 : const auto ExportToWkt = [](const OGRSpatialReference *poSRS)
3723 : {
3724 : // Try first in WKT1 for backward compat
3725 : {
3726 276 : char *pszWKT = nullptr;
3727 276 : const char *const apszOptions[] = {"FORMAT=WKT1", nullptr};
3728 276 : CPLErrorHandlerPusher oHandler(CPLQuietErrorHandler);
3729 276 : CPLErrorStateBackuper oBackuper;
3730 276 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3731 : {
3732 550 : std::string osRet(pszWKT);
3733 275 : CPLFree(pszWKT);
3734 275 : return osRet;
3735 : }
3736 1 : CPLFree(pszWKT);
3737 : }
3738 :
3739 1 : char *pszWKT = nullptr;
3740 1 : const char *const apszOptions[] = {"FORMAT=WKT2_2019", nullptr};
3741 1 : if (poSRS->exportToWkt(&pszWKT, apszOptions) == OGRERR_NONE)
3742 : {
3743 2 : std::string osRet(pszWKT);
3744 1 : CPLFree(pszWKT);
3745 1 : return osRet;
3746 : }
3747 0 : CPLFree(pszWKT);
3748 0 : return std::string();
3749 : };
3750 :
3751 138 : auto poSRS = psInfo->poForwardTransform->GetSourceCS();
3752 138 : if (poSRS)
3753 : {
3754 276 : const auto osWKT = ExportToWkt(poSRS);
3755 138 : CPLCreateXMLElementAndValue(psTree, "SourceSRS", osWKT.c_str());
3756 : }
3757 :
3758 : /* -------------------------------------------------------------------- */
3759 : /* Handle DestinationCS. */
3760 : /* -------------------------------------------------------------------- */
3761 138 : poSRS = psInfo->poForwardTransform->GetTargetCS();
3762 138 : if (poSRS)
3763 : {
3764 276 : const auto osWKT = ExportToWkt(poSRS);
3765 138 : CPLCreateXMLElementAndValue(psTree, "TargetSRS", osWKT.c_str());
3766 : }
3767 :
3768 : /* -------------------------------------------------------------------- */
3769 : /* Serialize options. */
3770 : /* -------------------------------------------------------------------- */
3771 138 : if (psInfo->papszOptions)
3772 : {
3773 : CPLXMLNode *psOptions =
3774 125 : CPLCreateXMLNode(psTree, CXT_Element, "Options");
3775 308 : for (auto iter = psInfo->papszOptions; *iter != nullptr; ++iter)
3776 : {
3777 183 : char *pszKey = nullptr;
3778 183 : const char *pszValue = CPLParseNameValue(*iter, &pszKey);
3779 183 : if (pszKey && pszValue)
3780 : {
3781 : auto elt =
3782 183 : CPLCreateXMLElementAndValue(psOptions, "Option", pszValue);
3783 183 : CPLAddXMLAttributeAndValue(elt, "key", pszKey);
3784 : }
3785 183 : CPLFree(pszKey);
3786 : }
3787 : }
3788 :
3789 138 : return psTree;
3790 : }
3791 :
3792 : /************************************************************************/
3793 : /* GDALDeserializeReprojectionTransformer() */
3794 : /************************************************************************/
3795 :
3796 185 : static void *GDALDeserializeReprojectionTransformer(CPLXMLNode *psTree)
3797 :
3798 : {
3799 185 : const char *pszSourceSRS = CPLGetXMLValue(psTree, "SourceSRS", nullptr);
3800 185 : const char *pszTargetSRS = CPLGetXMLValue(psTree, "TargetSRS", nullptr);
3801 185 : char *pszSourceWKT = nullptr, *pszTargetWKT = nullptr;
3802 185 : void *pResult = nullptr;
3803 :
3804 370 : OGRSpatialReference oSrcSRS;
3805 370 : OGRSpatialReference oDstSRS;
3806 :
3807 185 : oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3808 185 : oDstSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3809 185 : if (pszSourceSRS != nullptr)
3810 : {
3811 185 : oSrcSRS.SetFromUserInput(pszSourceSRS);
3812 : }
3813 :
3814 185 : if (pszTargetSRS != nullptr)
3815 : {
3816 185 : oDstSRS.SetFromUserInput(pszTargetSRS);
3817 : }
3818 :
3819 185 : CPLStringList aosList;
3820 185 : const CPLXMLNode *psOptions = CPLGetXMLNode(psTree, "Options");
3821 185 : if (psOptions)
3822 : {
3823 376 : for (auto iter = psOptions->psChild; iter; iter = iter->psNext)
3824 : {
3825 227 : if (iter->eType == CXT_Element &&
3826 227 : strcmp(iter->pszValue, "Option") == 0)
3827 : {
3828 227 : const char *pszKey = CPLGetXMLValue(iter, "key", nullptr);
3829 227 : const char *pszValue = CPLGetXMLValue(iter, nullptr, nullptr);
3830 227 : if (pszKey && pszValue)
3831 : {
3832 227 : aosList.SetNameValue(pszKey, pszValue);
3833 : }
3834 : }
3835 : }
3836 : }
3837 :
3838 185 : pResult = GDALCreateReprojectionTransformerEx(
3839 185 : !oSrcSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oSrcSRS) : nullptr,
3840 185 : !oDstSRS.IsEmpty() ? OGRSpatialReference::ToHandle(&oDstSRS) : nullptr,
3841 185 : aosList.List());
3842 :
3843 185 : CPLFree(pszSourceWKT);
3844 185 : CPLFree(pszTargetWKT);
3845 :
3846 370 : return pResult;
3847 : }
3848 :
3849 : /************************************************************************/
3850 : /* ==================================================================== */
3851 : /* Approximate transformer. */
3852 : /* ==================================================================== */
3853 : /************************************************************************/
3854 :
3855 : /************************************************************************/
3856 : /* GDALCreateSimilarApproxTransformer() */
3857 : /************************************************************************/
3858 :
3859 25 : static void *GDALCreateSimilarApproxTransformer(void *hTransformArg,
3860 : double dfSrcRatioX,
3861 : double dfSrcRatioY)
3862 : {
3863 25 : VALIDATE_POINTER1(hTransformArg, "GDALCreateSimilarApproxTransformer",
3864 : nullptr);
3865 :
3866 25 : GDALApproxTransformInfo *psInfo =
3867 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
3868 :
3869 25 : void *pBaseCBData = GDALCreateSimilarTransformer(psInfo->pBaseCBData,
3870 : dfSrcRatioX, dfSrcRatioY);
3871 25 : if (pBaseCBData == nullptr)
3872 : {
3873 0 : return nullptr;
3874 : }
3875 :
3876 : GDALApproxTransformInfo *psClonedInfo =
3877 25 : static_cast<GDALApproxTransformInfo *>(GDALCreateApproxTransformer2(
3878 : psInfo->pfnBaseTransformer, pBaseCBData, psInfo->dfMaxErrorForward,
3879 : psInfo->dfMaxErrorReverse));
3880 25 : psClonedInfo->bOwnSubtransformer = TRUE;
3881 :
3882 25 : return psClonedInfo;
3883 : }
3884 :
3885 : /************************************************************************/
3886 : /* GDALSerializeApproxTransformer() */
3887 : /************************************************************************/
3888 :
3889 58 : static CPLXMLNode *GDALSerializeApproxTransformer(void *pTransformArg)
3890 :
3891 : {
3892 : CPLXMLNode *psTree;
3893 58 : GDALApproxTransformInfo *psInfo =
3894 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
3895 :
3896 58 : psTree = CPLCreateXMLNode(nullptr, CXT_Element, "ApproxTransformer");
3897 :
3898 : /* -------------------------------------------------------------------- */
3899 : /* Attach max error. */
3900 : /* -------------------------------------------------------------------- */
3901 58 : if (psInfo->dfMaxErrorForward == psInfo->dfMaxErrorReverse)
3902 : {
3903 56 : CPLCreateXMLElementAndValue(
3904 : psTree, "MaxError",
3905 112 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3906 : }
3907 : else
3908 : {
3909 2 : CPLCreateXMLElementAndValue(
3910 : psTree, "MaxErrorForward",
3911 4 : CPLString().Printf("%g", psInfo->dfMaxErrorForward));
3912 2 : CPLCreateXMLElementAndValue(
3913 : psTree, "MaxErrorReverse",
3914 4 : CPLString().Printf("%g", psInfo->dfMaxErrorReverse));
3915 : }
3916 :
3917 : /* -------------------------------------------------------------------- */
3918 : /* Capture underlying transformer. */
3919 : /* -------------------------------------------------------------------- */
3920 : CPLXMLNode *psTransformerContainer =
3921 58 : CPLCreateXMLNode(psTree, CXT_Element, "BaseTransformer");
3922 :
3923 58 : CPLXMLNode *psTransformer = GDALSerializeTransformer(
3924 : psInfo->pfnBaseTransformer, psInfo->pBaseCBData);
3925 58 : if (psTransformer != nullptr)
3926 58 : CPLAddXMLChild(psTransformerContainer, psTransformer);
3927 :
3928 58 : return psTree;
3929 : }
3930 :
3931 : /************************************************************************/
3932 : /* GDALCreateApproxTransformer() */
3933 : /************************************************************************/
3934 :
3935 : /**
3936 : * Create an approximating transformer.
3937 : *
3938 : * This function creates a context for an approximated transformer. Basically
3939 : * a high precision transformer is supplied as input and internally linear
3940 : * approximations are computed to generate results to within a defined
3941 : * precision.
3942 : *
3943 : * The approximation is actually done at the point where GDALApproxTransform()
3944 : * calls are made, and depend on the assumption that they are roughly linear.
3945 : * The first and last point passed in must be the extreme values and the
3946 : * intermediate values should describe a curve between the end points. The
3947 : * approximator transforms and centers using the approximate transformer, and
3948 : * then compares the true middle transformed value to a linear approximation
3949 : * based on the end points. If the error is within the supplied threshold then
3950 : * the end points are used to linearly approximate all the values otherwise the
3951 : * input points are split into two smaller sets, and the function is recursively
3952 : * called until a sufficiently small set of points is found that the linear
3953 : * approximation is OK, or that all the points are exactly computed.
3954 : *
3955 : * This function is very suitable for approximating transformation results
3956 : * from output pixel/line space to input coordinates for warpers that operate
3957 : * on one input scanline at a time. Care should be taken using it in other
3958 : * circumstances as little internal validation is done in order to keep things
3959 : * fast.
3960 : *
3961 : * @param pfnBaseTransformer the high precision transformer which should be
3962 : * approximated.
3963 : * @param pBaseTransformArg the callback argument for the high precision
3964 : * transformer.
3965 : * @param dfMaxError the maximum cartesian error in the "output" space that
3966 : * is to be accepted in the linear approximation, evaluated as a Manhattan
3967 : * distance.
3968 : *
3969 : * @return callback pointer suitable for use with GDALApproxTransform(). It
3970 : * should be deallocated with GDALDestroyApproxTransformer().
3971 : */
3972 :
3973 1039 : void *GDALCreateApproxTransformer(GDALTransformerFunc pfnBaseTransformer,
3974 : void *pBaseTransformArg, double dfMaxError)
3975 :
3976 : {
3977 1039 : return GDALCreateApproxTransformer2(pfnBaseTransformer, pBaseTransformArg,
3978 1039 : dfMaxError, dfMaxError);
3979 : }
3980 :
3981 : static void *
3982 1217 : GDALCreateApproxTransformer2(GDALTransformerFunc pfnBaseTransformer,
3983 : void *pBaseTransformArg, double dfMaxErrorForward,
3984 : double dfMaxErrorReverse)
3985 :
3986 : {
3987 1217 : GDALApproxTransformInfo *psATInfo = new GDALApproxTransformInfo;
3988 1217 : psATInfo->pfnBaseTransformer = pfnBaseTransformer;
3989 1217 : psATInfo->pBaseCBData = pBaseTransformArg;
3990 1217 : psATInfo->dfMaxErrorForward = dfMaxErrorForward;
3991 1217 : psATInfo->dfMaxErrorReverse = dfMaxErrorReverse;
3992 1217 : psATInfo->bOwnSubtransformer = FALSE;
3993 :
3994 1217 : memcpy(psATInfo->sTI.abySignature, GDAL_GTI2_SIGNATURE,
3995 : strlen(GDAL_GTI2_SIGNATURE));
3996 1217 : psATInfo->sTI.pszClassName = GDAL_APPROX_TRANSFORMER_CLASS_NAME;
3997 1217 : psATInfo->sTI.pfnTransform = GDALApproxTransform;
3998 1217 : psATInfo->sTI.pfnCleanup = GDALDestroyApproxTransformer;
3999 1217 : psATInfo->sTI.pfnSerialize = GDALSerializeApproxTransformer;
4000 1217 : psATInfo->sTI.pfnCreateSimilar = GDALCreateSimilarApproxTransformer;
4001 :
4002 1217 : return psATInfo;
4003 : }
4004 :
4005 : /************************************************************************/
4006 : /* GDALApproxTransformerOwnsSubtransformer() */
4007 : /************************************************************************/
4008 :
4009 : /** Set bOwnSubtransformer flag */
4010 1189 : void GDALApproxTransformerOwnsSubtransformer(void *pCBData, int bOwnFlag)
4011 :
4012 : {
4013 1189 : GDALApproxTransformInfo *psATInfo =
4014 : static_cast<GDALApproxTransformInfo *>(pCBData);
4015 :
4016 1189 : psATInfo->bOwnSubtransformer = bOwnFlag;
4017 1189 : }
4018 :
4019 : /************************************************************************/
4020 : /* GDALDestroyApproxTransformer() */
4021 : /************************************************************************/
4022 :
4023 : /**
4024 : * Cleanup approximate transformer.
4025 : *
4026 : * Deallocates the resources allocated by GDALCreateApproxTransformer().
4027 : *
4028 : * @param pCBData callback data originally returned by
4029 : * GDALCreateApproxTransformer().
4030 : */
4031 :
4032 1217 : void GDALDestroyApproxTransformer(void *pCBData)
4033 :
4034 : {
4035 1217 : if (pCBData == nullptr)
4036 0 : return;
4037 :
4038 1217 : GDALApproxTransformInfo *psATInfo =
4039 : static_cast<GDALApproxTransformInfo *>(pCBData);
4040 :
4041 1217 : if (psATInfo->bOwnSubtransformer)
4042 1214 : GDALDestroyTransformer(psATInfo->pBaseCBData);
4043 :
4044 1217 : delete psATInfo;
4045 : }
4046 :
4047 : /************************************************************************/
4048 : /* GDALRefreshApproxTransformer() */
4049 : /************************************************************************/
4050 :
4051 44 : void GDALRefreshApproxTransformer(void *hTransformArg)
4052 : {
4053 44 : GDALApproxTransformInfo *psInfo =
4054 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4055 :
4056 44 : if (GDALIsTransformer(psInfo->pBaseCBData,
4057 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4058 : {
4059 44 : GDALRefreshGenImgProjTransformer(psInfo->pBaseCBData);
4060 : }
4061 44 : }
4062 :
4063 : /************************************************************************/
4064 : /* GDALApproxTransformInternal() */
4065 : /************************************************************************/
4066 :
4067 1224280 : static int GDALApproxTransformInternal(void *pCBData, int bDstToSrc,
4068 : int nPoints, double *x, double *y,
4069 : double *z, int *panSuccess,
4070 : // SME = Start, Middle, End.
4071 : const double xSMETransformed[3],
4072 : const double ySMETransformed[3],
4073 : const double zSMETransformed[3])
4074 : {
4075 1224280 : GDALApproxTransformInfo *psATInfo =
4076 : static_cast<GDALApproxTransformInfo *>(pCBData);
4077 1224280 : const int nMiddle = (nPoints - 1) / 2;
4078 :
4079 : #ifdef notdef_sanify_check
4080 : {
4081 : double x2[3] = {x[0], x[nMiddle], x[nPoints - 1]};
4082 : double y2[3] = {y[0], y[nMiddle], y[nPoints - 1]};
4083 : double z2[3] = {z[0], z[nMiddle], z[nPoints - 1]};
4084 : int anSuccess2[3] = {};
4085 :
4086 : const int bSuccess = psATInfo->pfnBaseTransformer(
4087 : psATInfo->pBaseCBData, bDstToSrc, 3, x2, y2, z2, anSuccess2);
4088 : CPLAssert(bSuccess);
4089 : CPLAssert(anSuccess2[0]);
4090 : CPLAssert(anSuccess2[1]);
4091 : CPLAssert(anSuccess2[2]);
4092 : CPLAssert(x2[0] == xSMETransformed[0]);
4093 : CPLAssert(y2[0] == ySMETransformed[0]);
4094 : CPLAssert(z2[0] == zSMETransformed[0]);
4095 : CPLAssert(x2[1] == xSMETransformed[1]);
4096 : CPLAssert(y2[1] == ySMETransformed[1]);
4097 : CPLAssert(z2[1] == zSMETransformed[1]);
4098 : CPLAssert(x2[2] == xSMETransformed[2]);
4099 : CPLAssert(y2[2] == ySMETransformed[2]);
4100 : CPLAssert(z2[2] == zSMETransformed[2]);
4101 : }
4102 : #endif
4103 :
4104 : #ifdef DEBUG_APPROX_TRANSFORMER
4105 : fprintf(stderr, "start (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4106 : x[0], y[0], xSMETransformed[0], ySMETransformed[0]);
4107 : fprintf(stderr, "middle (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4108 : x[nMiddle], y[nMiddle], xSMETransformed[1], ySMETransformed[1]);
4109 : fprintf(stderr, "end (%.3f,%.3f) -> (%.3f,%.3f)\n", /*ok*/
4110 : x[nPoints - 1], y[nPoints - 1], xSMETransformed[2],
4111 : ySMETransformed[2]);
4112 : #endif
4113 :
4114 : /* -------------------------------------------------------------------- */
4115 : /* Is the error at the middle acceptable relative to an */
4116 : /* interpolation of the middle position? */
4117 : /* -------------------------------------------------------------------- */
4118 1224280 : const double dfDeltaX =
4119 1224280 : (xSMETransformed[2] - xSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4120 1224280 : const double dfDeltaY =
4121 1224280 : (ySMETransformed[2] - ySMETransformed[0]) / (x[nPoints - 1] - x[0]);
4122 1224280 : const double dfDeltaZ =
4123 1224280 : (zSMETransformed[2] - zSMETransformed[0]) / (x[nPoints - 1] - x[0]);
4124 :
4125 1224280 : const double dfError =
4126 1224280 : fabs((xSMETransformed[0] + dfDeltaX * (x[nMiddle] - x[0])) -
4127 1224280 : xSMETransformed[1]) +
4128 1224280 : fabs((ySMETransformed[0] + dfDeltaY * (x[nMiddle] - x[0])) -
4129 1224280 : ySMETransformed[1]);
4130 :
4131 1224280 : const double dfMaxError =
4132 1224280 : (bDstToSrc) ? psATInfo->dfMaxErrorReverse : psATInfo->dfMaxErrorForward;
4133 1224280 : if (dfError > dfMaxError)
4134 : {
4135 : #if DEBUG_VERBOSE
4136 : CPLDebug("GDAL",
4137 : "ApproxTransformer - "
4138 : "error %g over threshold %g, subdivide %d points.",
4139 : dfError, dfMaxError, nPoints);
4140 : #endif
4141 :
4142 593363 : double xMiddle[3] = {x[(nMiddle - 1) / 2], x[nMiddle - 1],
4143 593363 : x[nMiddle + (nPoints - nMiddle - 1) / 2]};
4144 593363 : double yMiddle[3] = {y[(nMiddle - 1) / 2], y[nMiddle - 1],
4145 593363 : y[nMiddle + (nPoints - nMiddle - 1) / 2]};
4146 593363 : double zMiddle[3] = {z[(nMiddle - 1) / 2], z[nMiddle - 1],
4147 593363 : z[nMiddle + (nPoints - nMiddle - 1) / 2]};
4148 :
4149 593363 : const bool bUseBaseTransformForHalf1 =
4150 464934 : nMiddle <= 5 || y[0] != y[nMiddle - 1] ||
4151 1523230 : y[0] != y[(nMiddle - 1) / 2] || x[0] == x[nMiddle - 1] ||
4152 464934 : x[0] == x[(nMiddle - 1) / 2];
4153 593363 : const bool bUseBaseTransformForHalf2 =
4154 479069 : nPoints - nMiddle <= 5 || y[nMiddle] != y[nPoints - 1] ||
4155 479069 : y[nMiddle] != y[nMiddle + (nPoints - nMiddle - 1) / 2] ||
4156 1551500 : x[nMiddle] == x[nPoints - 1] ||
4157 479069 : x[nMiddle] == x[nMiddle + (nPoints - nMiddle - 1) / 2];
4158 :
4159 593363 : int anSuccess2[3] = {};
4160 593363 : int bSuccess = FALSE;
4161 593363 : if (!bUseBaseTransformForHalf1 && !bUseBaseTransformForHalf2)
4162 464934 : bSuccess = psATInfo->pfnBaseTransformer(
4163 : psATInfo->pBaseCBData, bDstToSrc, 3, xMiddle, yMiddle, zMiddle,
4164 : anSuccess2);
4165 128429 : else if (!bUseBaseTransformForHalf1)
4166 : {
4167 0 : bSuccess = psATInfo->pfnBaseTransformer(
4168 : psATInfo->pBaseCBData, bDstToSrc, 2, xMiddle, yMiddle, zMiddle,
4169 : anSuccess2);
4170 0 : anSuccess2[2] = TRUE;
4171 : }
4172 128429 : else if (!bUseBaseTransformForHalf2)
4173 : {
4174 14135 : bSuccess = psATInfo->pfnBaseTransformer(
4175 : psATInfo->pBaseCBData, bDstToSrc, 1, xMiddle + 2, yMiddle + 2,
4176 : zMiddle + 2, anSuccess2 + 2);
4177 14135 : anSuccess2[0] = TRUE;
4178 14135 : anSuccess2[1] = TRUE;
4179 : }
4180 :
4181 593363 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4182 : {
4183 114310 : bSuccess = psATInfo->pfnBaseTransformer(
4184 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4185 : z + 1, panSuccess + 1);
4186 228620 : bSuccess &= psATInfo->pfnBaseTransformer(
4187 114310 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4188 114310 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4189 114310 : panSuccess + nMiddle + 1);
4190 :
4191 114310 : x[0] = xSMETransformed[0];
4192 114310 : y[0] = ySMETransformed[0];
4193 114310 : z[0] = zSMETransformed[0];
4194 114310 : panSuccess[0] = TRUE;
4195 114310 : x[nMiddle] = xSMETransformed[1];
4196 114310 : y[nMiddle] = ySMETransformed[1];
4197 114310 : z[nMiddle] = zSMETransformed[1];
4198 114310 : panSuccess[nMiddle] = TRUE;
4199 114310 : x[nPoints - 1] = xSMETransformed[2];
4200 114310 : y[nPoints - 1] = ySMETransformed[2];
4201 114310 : z[nPoints - 1] = zSMETransformed[2];
4202 114310 : panSuccess[nPoints - 1] = TRUE;
4203 114310 : return bSuccess;
4204 : }
4205 :
4206 479053 : double x2[3] = {};
4207 479053 : double y2[3] = {};
4208 479053 : double z2[3] = {};
4209 479053 : if (!bUseBaseTransformForHalf1)
4210 : {
4211 464918 : x2[0] = xSMETransformed[0];
4212 464918 : y2[0] = ySMETransformed[0];
4213 464918 : z2[0] = zSMETransformed[0];
4214 464918 : x2[1] = xMiddle[0];
4215 464918 : y2[1] = yMiddle[0];
4216 464918 : z2[1] = zMiddle[0];
4217 464918 : x2[2] = xMiddle[1];
4218 464918 : y2[2] = yMiddle[1];
4219 464918 : z2[2] = zMiddle[1];
4220 :
4221 464918 : bSuccess = GDALApproxTransformInternal(
4222 : psATInfo, bDstToSrc, nMiddle, x, y, z, panSuccess, x2, y2, z2);
4223 : }
4224 : else
4225 : {
4226 14135 : bSuccess = psATInfo->pfnBaseTransformer(
4227 : psATInfo->pBaseCBData, bDstToSrc, nMiddle - 1, x + 1, y + 1,
4228 : z + 1, panSuccess + 1);
4229 14135 : x[0] = xSMETransformed[0];
4230 14135 : y[0] = ySMETransformed[0];
4231 14135 : z[0] = zSMETransformed[0];
4232 14135 : panSuccess[0] = TRUE;
4233 : }
4234 :
4235 479053 : if (!bSuccess)
4236 24 : return FALSE;
4237 :
4238 479029 : if (!bUseBaseTransformForHalf2)
4239 : {
4240 479029 : x2[0] = xSMETransformed[1];
4241 479029 : y2[0] = ySMETransformed[1];
4242 479029 : z2[0] = zSMETransformed[1];
4243 479029 : x2[1] = xMiddle[2];
4244 479029 : y2[1] = yMiddle[2];
4245 479029 : z2[1] = zMiddle[2];
4246 479029 : x2[2] = xSMETransformed[2];
4247 479029 : y2[2] = ySMETransformed[2];
4248 479029 : z2[2] = zSMETransformed[2];
4249 :
4250 479029 : bSuccess = GDALApproxTransformInternal(
4251 479029 : psATInfo, bDstToSrc, nPoints - nMiddle, x + nMiddle,
4252 479029 : y + nMiddle, z + nMiddle, panSuccess + nMiddle, x2, y2, z2);
4253 : }
4254 : else
4255 : {
4256 0 : bSuccess = psATInfo->pfnBaseTransformer(
4257 0 : psATInfo->pBaseCBData, bDstToSrc, nPoints - nMiddle - 2,
4258 0 : x + nMiddle + 1, y + nMiddle + 1, z + nMiddle + 1,
4259 0 : panSuccess + nMiddle + 1);
4260 :
4261 0 : x[nMiddle] = xSMETransformed[1];
4262 0 : y[nMiddle] = ySMETransformed[1];
4263 0 : z[nMiddle] = zSMETransformed[1];
4264 0 : panSuccess[nMiddle] = TRUE;
4265 0 : x[nPoints - 1] = xSMETransformed[2];
4266 0 : y[nPoints - 1] = ySMETransformed[2];
4267 0 : z[nPoints - 1] = zSMETransformed[2];
4268 0 : panSuccess[nPoints - 1] = TRUE;
4269 : }
4270 :
4271 479029 : if (!bSuccess)
4272 2 : return FALSE;
4273 :
4274 479027 : return TRUE;
4275 : }
4276 :
4277 : /* -------------------------------------------------------------------- */
4278 : /* Error is OK since this is just used to compute output bounds */
4279 : /* of newly created file for gdalwarper. So just use affine */
4280 : /* approximation of the reverse transform. Eventually we */
4281 : /* should implement iterative searching to find a result within */
4282 : /* our error threshold. */
4283 : /* NOTE: the above comment is not true: gdalwarp uses approximator */
4284 : /* also to compute the source pixel of each target pixel. */
4285 : /* -------------------------------------------------------------------- */
4286 124694000 : for (int i = nPoints - 1; i >= 0; i--)
4287 : {
4288 : #ifdef check_error
4289 : double xtemp = x[i];
4290 : double ytemp = y[i];
4291 : double ztemp = z[i];
4292 : double x_ori = xtemp;
4293 : double y_ori = ytemp;
4294 : int btemp = FALSE;
4295 : psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 1,
4296 : &xtemp, &ytemp, &ztemp, &btemp);
4297 : #endif
4298 124063000 : const double dfDist = (x[i] - x[0]);
4299 124063000 : x[i] = xSMETransformed[0] + dfDeltaX * dfDist;
4300 124063000 : y[i] = ySMETransformed[0] + dfDeltaY * dfDist;
4301 124063000 : z[i] = zSMETransformed[0] + dfDeltaZ * dfDist;
4302 : #ifdef check_error
4303 : const double dfError2 = fabs(x[i] - xtemp) + fabs(y[i] - ytemp);
4304 : if (dfError2 > 4 /*10 * dfMaxError*/)
4305 : {
4306 : /*ok*/ printf("Error = %f on (%f, %f)\n", dfError2, x_ori, y_ori);
4307 : }
4308 : #endif
4309 124063000 : panSuccess[i] = TRUE;
4310 : }
4311 :
4312 630920 : return TRUE;
4313 : }
4314 :
4315 : /************************************************************************/
4316 : /* GDALApproxTransform() */
4317 : /************************************************************************/
4318 :
4319 : /**
4320 : * Perform approximate transformation.
4321 : *
4322 : * Actually performs the approximate transformation described in
4323 : * GDALCreateApproxTransformer(). This function matches the
4324 : * GDALTransformerFunc() signature. Details of the arguments are described
4325 : * there.
4326 : */
4327 :
4328 702683 : int GDALApproxTransform(void *pCBData, int bDstToSrc, int nPoints, double *x,
4329 : double *y, double *z, int *panSuccess)
4330 :
4331 : {
4332 702683 : GDALApproxTransformInfo *psATInfo =
4333 : static_cast<GDALApproxTransformInfo *>(pCBData);
4334 702683 : double x2[3] = {};
4335 702683 : double y2[3] = {};
4336 702683 : double z2[3] = {};
4337 702683 : int anSuccess2[3] = {};
4338 : int bSuccess;
4339 :
4340 702683 : const int nMiddle = (nPoints - 1) / 2;
4341 :
4342 : /* -------------------------------------------------------------------- */
4343 : /* Bail if our preconditions are not met, or if error is not */
4344 : /* acceptable. */
4345 : /* -------------------------------------------------------------------- */
4346 702683 : int bRet = FALSE;
4347 702683 : if (y[0] != y[nPoints - 1] || y[0] != y[nMiddle] ||
4348 693390 : x[0] == x[nPoints - 1] || x[0] == x[nMiddle] ||
4349 286175 : (psATInfo->dfMaxErrorForward == 0.0 &&
4350 286175 : psATInfo->dfMaxErrorReverse == 0.0) ||
4351 : nPoints <= 5)
4352 : {
4353 416930 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4354 : nPoints, x, y, z, panSuccess);
4355 416928 : goto end;
4356 : }
4357 :
4358 : /* -------------------------------------------------------------------- */
4359 : /* Transform first, last and middle point. */
4360 : /* -------------------------------------------------------------------- */
4361 285753 : x2[0] = x[0];
4362 285753 : y2[0] = y[0];
4363 285753 : z2[0] = z[0];
4364 285753 : x2[1] = x[nMiddle];
4365 285753 : y2[1] = y[nMiddle];
4366 285753 : z2[1] = z[nMiddle];
4367 285753 : x2[2] = x[nPoints - 1];
4368 285753 : y2[2] = y[nPoints - 1];
4369 285753 : z2[2] = z[nPoints - 1];
4370 :
4371 285753 : bSuccess = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc, 3,
4372 : x2, y2, z2, anSuccess2);
4373 285754 : if (!bSuccess || !anSuccess2[0] || !anSuccess2[1] || !anSuccess2[2])
4374 : {
4375 5419 : bRet = psATInfo->pfnBaseTransformer(psATInfo->pBaseCBData, bDstToSrc,
4376 : nPoints, x, y, z, panSuccess);
4377 5416 : goto end;
4378 : }
4379 :
4380 280335 : bRet = GDALApproxTransformInternal(pCBData, bDstToSrc, nPoints, x, y, z,
4381 : panSuccess, x2, y2, z2);
4382 :
4383 702683 : end:
4384 : #ifdef DEBUG_APPROX_TRANSFORMER
4385 : for (int i = 0; i < nPoints; i++)
4386 : fprintf(stderr, "[%d] (%.10f,%.10f) %d\n", /*ok*/
4387 : i, x[i], y[i], panSuccess[i]);
4388 : #endif
4389 :
4390 702683 : return bRet;
4391 : }
4392 :
4393 : /************************************************************************/
4394 : /* GDALDeserializeApproxTransformer() */
4395 : /************************************************************************/
4396 :
4397 151 : static void *GDALDeserializeApproxTransformer(CPLXMLNode *psTree)
4398 :
4399 : {
4400 151 : double dfMaxErrorForward = 0.25;
4401 151 : double dfMaxErrorReverse = 0.25;
4402 151 : const char *pszMaxError = CPLGetXMLValue(psTree, "MaxError", nullptr);
4403 151 : if (pszMaxError != nullptr)
4404 : {
4405 149 : dfMaxErrorForward = CPLAtof(pszMaxError);
4406 149 : dfMaxErrorReverse = dfMaxErrorForward;
4407 : }
4408 : const char *pszMaxErrorForward =
4409 151 : CPLGetXMLValue(psTree, "MaxErrorForward", nullptr);
4410 151 : if (pszMaxErrorForward != nullptr)
4411 : {
4412 2 : dfMaxErrorForward = CPLAtof(pszMaxErrorForward);
4413 : }
4414 : const char *pszMaxErrorReverse =
4415 151 : CPLGetXMLValue(psTree, "MaxErrorReverse", nullptr);
4416 151 : if (pszMaxErrorReverse != nullptr)
4417 : {
4418 2 : dfMaxErrorReverse = CPLAtof(pszMaxErrorReverse);
4419 : }
4420 :
4421 151 : GDALTransformerFunc pfnBaseTransform = nullptr;
4422 151 : void *pBaseCBData = nullptr;
4423 :
4424 151 : CPLXMLNode *psContainer = CPLGetXMLNode(psTree, "BaseTransformer");
4425 :
4426 151 : if (psContainer != nullptr && psContainer->psChild != nullptr)
4427 : {
4428 151 : GDALDeserializeTransformer(psContainer->psChild, &pfnBaseTransform,
4429 : &pBaseCBData);
4430 : }
4431 :
4432 151 : if (pfnBaseTransform == nullptr)
4433 : {
4434 0 : CPLError(CE_Failure, CPLE_AppDefined,
4435 : "Cannot get base transform for approx transformer.");
4436 0 : return nullptr;
4437 : }
4438 :
4439 151 : void *pApproxCBData = GDALCreateApproxTransformer2(
4440 : pfnBaseTransform, pBaseCBData, dfMaxErrorForward, dfMaxErrorReverse);
4441 151 : GDALApproxTransformerOwnsSubtransformer(pApproxCBData, TRUE);
4442 :
4443 151 : return pApproxCBData;
4444 : }
4445 :
4446 : /************************************************************************/
4447 : /* GDALTransformLonLatToDestApproxTransformer() */
4448 : /************************************************************************/
4449 :
4450 2398 : int GDALTransformLonLatToDestApproxTransformer(void *hTransformArg,
4451 : double *pdfX, double *pdfY)
4452 : {
4453 2398 : GDALApproxTransformInfo *psInfo =
4454 : static_cast<GDALApproxTransformInfo *>(hTransformArg);
4455 :
4456 2398 : if (GDALIsTransformer(psInfo->pBaseCBData,
4457 : GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4458 : {
4459 2398 : return GDALTransformLonLatToDestGenImgProjTransformer(
4460 2398 : psInfo->pBaseCBData, pdfX, pdfY);
4461 : }
4462 0 : return false;
4463 : }
4464 :
4465 : /************************************************************************/
4466 : /* GDALApplyGeoTransform() */
4467 : /************************************************************************/
4468 :
4469 : /**
4470 : * Apply GeoTransform to x/y coordinate.
4471 : *
4472 : * Applies the following computation, converting a (pixel, line) coordinate
4473 : * into a georeferenced (geo_x, geo_y) location.
4474 : * \code{.c}
4475 : * *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1]
4476 : * + dfLine * padfGeoTransform[2];
4477 : * *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4]
4478 : * + dfLine * padfGeoTransform[5];
4479 : * \endcode
4480 : *
4481 : * @param padfGeoTransform Six coefficient GeoTransform to apply.
4482 : * @param dfPixel Input pixel position.
4483 : * @param dfLine Input line position.
4484 : * @param pdfGeoX output location where geo_x (easting/longitude)
4485 : * location is placed.
4486 : * @param pdfGeoY output location where geo_y (northing/latitude)
4487 : * location is placed.
4488 : */
4489 :
4490 306698 : void CPL_STDCALL GDALApplyGeoTransform(const double *padfGeoTransform,
4491 : double dfPixel, double dfLine,
4492 : double *pdfGeoX, double *pdfGeoY)
4493 : {
4494 306698 : *pdfGeoX = padfGeoTransform[0] + dfPixel * padfGeoTransform[1] +
4495 306698 : dfLine * padfGeoTransform[2];
4496 306698 : *pdfGeoY = padfGeoTransform[3] + dfPixel * padfGeoTransform[4] +
4497 306698 : dfLine * padfGeoTransform[5];
4498 306698 : }
4499 :
4500 : /************************************************************************/
4501 : /* GDALInvGeoTransform() */
4502 : /************************************************************************/
4503 :
4504 : /**
4505 : * Invert Geotransform.
4506 : *
4507 : * This function will invert a standard 3x2 set of GeoTransform coefficients.
4508 : * This converts the equation from being pixel to geo to being geo to pixel.
4509 : *
4510 : * @param gt_in Input geotransform (six doubles - unaltered).
4511 : * @param gt_out Output geotransform (six doubles - updated).
4512 : *
4513 : * @return TRUE on success or FALSE if the equation is uninvertable.
4514 : */
4515 :
4516 3341 : int CPL_STDCALL GDALInvGeoTransform(const double *gt_in, double *gt_out)
4517 :
4518 : {
4519 : // Special case - no rotation - to avoid computing determinate
4520 : // and potential precision issues.
4521 3341 : if (gt_in[2] == 0.0 && gt_in[4] == 0.0 && gt_in[1] != 0.0 &&
4522 3284 : gt_in[5] != 0.0)
4523 : {
4524 : /*X = gt_in[0] + x * gt_in[1]
4525 : Y = gt_in[3] + y * gt_in[5]
4526 : -->
4527 : x = -gt_in[0] / gt_in[1] + (1 / gt_in[1]) * X
4528 : y = -gt_in[3] / gt_in[5] + (1 / gt_in[5]) * Y
4529 : */
4530 3284 : gt_out[0] = -gt_in[0] / gt_in[1];
4531 3284 : gt_out[1] = 1.0 / gt_in[1];
4532 3284 : gt_out[2] = 0.0;
4533 3284 : gt_out[3] = -gt_in[3] / gt_in[5];
4534 3284 : gt_out[4] = 0.0;
4535 3284 : gt_out[5] = 1.0 / gt_in[5];
4536 3284 : return 1;
4537 : }
4538 :
4539 : // Assume a 3rd row that is [1 0 0].
4540 :
4541 : // Compute determinate.
4542 :
4543 57 : const double det = gt_in[1] * gt_in[5] - gt_in[2] * gt_in[4];
4544 114 : const double magnitude = std::max(std::max(fabs(gt_in[1]), fabs(gt_in[2])),
4545 57 : std::max(fabs(gt_in[4]), fabs(gt_in[5])));
4546 :
4547 57 : if (fabs(det) <= 1e-10 * magnitude * magnitude)
4548 8 : return 0;
4549 :
4550 49 : const double inv_det = 1.0 / det;
4551 :
4552 : // Compute adjoint, and divide by determinate.
4553 :
4554 49 : gt_out[1] = gt_in[5] * inv_det;
4555 49 : gt_out[4] = -gt_in[4] * inv_det;
4556 :
4557 49 : gt_out[2] = -gt_in[2] * inv_det;
4558 49 : gt_out[5] = gt_in[1] * inv_det;
4559 :
4560 49 : gt_out[0] = (gt_in[2] * gt_in[3] - gt_in[0] * gt_in[5]) * inv_det;
4561 49 : gt_out[3] = (-gt_in[1] * gt_in[3] + gt_in[0] * gt_in[4]) * inv_det;
4562 :
4563 49 : return 1;
4564 : }
4565 :
4566 : /************************************************************************/
4567 : /* GDALSerializeTransformer() */
4568 : /************************************************************************/
4569 :
4570 268 : CPLXMLNode *GDALSerializeTransformer(GDALTransformerFunc /* pfnFunc */,
4571 : void *pTransformArg)
4572 : {
4573 268 : VALIDATE_POINTER1(pTransformArg, "GDALSerializeTransformer", nullptr);
4574 :
4575 268 : GDALTransformerInfo *psInfo =
4576 : static_cast<GDALTransformerInfo *>(pTransformArg);
4577 :
4578 268 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4579 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4580 : {
4581 0 : CPLError(CE_Failure, CPLE_AppDefined,
4582 : "Attempt to serialize non-GTI2 transformer.");
4583 0 : return nullptr;
4584 : }
4585 268 : else if (psInfo->pfnSerialize == nullptr)
4586 : {
4587 0 : CPLError(CE_Failure, CPLE_AppDefined,
4588 : "No serialization function available for this transformer.");
4589 0 : return nullptr;
4590 : }
4591 :
4592 268 : return psInfo->pfnSerialize(pTransformArg);
4593 : }
4594 :
4595 : /************************************************************************/
4596 : /* GDALRegisterTransformDeserializer() */
4597 : /************************************************************************/
4598 :
4599 : static CPLList *psListDeserializer = nullptr;
4600 : static CPLMutex *hDeserializerMutex = nullptr;
4601 :
4602 : typedef struct
4603 : {
4604 : char *pszTransformName;
4605 : GDALTransformerFunc pfnTransformerFunc;
4606 : GDALTransformDeserializeFunc pfnDeserializeFunc;
4607 : } TransformDeserializerInfo;
4608 :
4609 0 : void *GDALRegisterTransformDeserializer(
4610 : const char *pszTransformName, GDALTransformerFunc pfnTransformerFunc,
4611 : GDALTransformDeserializeFunc pfnDeserializeFunc)
4612 : {
4613 : TransformDeserializerInfo *psInfo =
4614 : static_cast<TransformDeserializerInfo *>(
4615 0 : CPLMalloc(sizeof(TransformDeserializerInfo)));
4616 0 : psInfo->pszTransformName = CPLStrdup(pszTransformName);
4617 0 : psInfo->pfnTransformerFunc = pfnTransformerFunc;
4618 0 : psInfo->pfnDeserializeFunc = pfnDeserializeFunc;
4619 :
4620 0 : CPLMutexHolderD(&hDeserializerMutex);
4621 0 : psListDeserializer = CPLListInsert(psListDeserializer, psInfo, 0);
4622 :
4623 0 : return psInfo;
4624 : }
4625 :
4626 : /************************************************************************/
4627 : /* GDALUnregisterTransformDeserializer() */
4628 : /************************************************************************/
4629 :
4630 0 : void GDALUnregisterTransformDeserializer(void *pData)
4631 : {
4632 0 : CPLMutexHolderD(&hDeserializerMutex);
4633 0 : CPLList *psList = psListDeserializer;
4634 0 : CPLList *psLast = nullptr;
4635 0 : while (psList)
4636 : {
4637 0 : if (psList->pData == pData)
4638 : {
4639 0 : TransformDeserializerInfo *psInfo =
4640 : static_cast<TransformDeserializerInfo *>(pData);
4641 0 : CPLFree(psInfo->pszTransformName);
4642 0 : CPLFree(pData);
4643 0 : if (psLast)
4644 0 : psLast->psNext = psList->psNext;
4645 : else
4646 0 : psListDeserializer = nullptr;
4647 0 : CPLFree(psList);
4648 0 : break;
4649 : }
4650 0 : psLast = psList;
4651 0 : psList = psList->psNext;
4652 : }
4653 0 : }
4654 :
4655 : /************************************************************************/
4656 : /* GDALUnregisterTransformDeserializer() */
4657 : /************************************************************************/
4658 :
4659 1121 : void GDALCleanupTransformDeserializerMutex()
4660 : {
4661 1121 : if (hDeserializerMutex != nullptr)
4662 : {
4663 0 : CPLDestroyMutex(hDeserializerMutex);
4664 0 : hDeserializerMutex = nullptr;
4665 : }
4666 1121 : }
4667 :
4668 : /************************************************************************/
4669 : /* GDALDeserializeTransformer() */
4670 : /************************************************************************/
4671 :
4672 551 : CPLErr GDALDeserializeTransformer(CPLXMLNode *psTree,
4673 : GDALTransformerFunc *ppfnFunc,
4674 : void **ppTransformArg)
4675 :
4676 : {
4677 551 : *ppfnFunc = nullptr;
4678 551 : *ppTransformArg = nullptr;
4679 :
4680 551 : CPLErrorReset();
4681 :
4682 551 : if (psTree == nullptr || psTree->eType != CXT_Element)
4683 0 : CPLError(CE_Failure, CPLE_AppDefined,
4684 : "Malformed element in GDALDeserializeTransformer");
4685 551 : else if (EQUAL(psTree->pszValue, "GenImgProjTransformer"))
4686 : {
4687 199 : *ppfnFunc = GDALGenImgProjTransform;
4688 199 : *ppTransformArg = GDALDeserializeGenImgProjTransformer(psTree);
4689 : }
4690 352 : else if (EQUAL(psTree->pszValue, "ReprojectionTransformer"))
4691 : {
4692 185 : *ppfnFunc = GDALReprojectionTransform;
4693 185 : *ppTransformArg = GDALDeserializeReprojectionTransformer(psTree);
4694 : }
4695 167 : else if (EQUAL(psTree->pszValue, "GCPTransformer"))
4696 : {
4697 5 : *ppfnFunc = GDALGCPTransform;
4698 5 : *ppTransformArg = GDALDeserializeGCPTransformer(psTree);
4699 : }
4700 162 : else if (EQUAL(psTree->pszValue, "TPSTransformer"))
4701 : {
4702 3 : *ppfnFunc = GDALTPSTransform;
4703 3 : *ppTransformArg = GDALDeserializeTPSTransformer(psTree);
4704 : }
4705 159 : else if (EQUAL(psTree->pszValue, "GeoLocTransformer"))
4706 : {
4707 1 : *ppfnFunc = GDALGeoLocTransform;
4708 1 : *ppTransformArg = GDALDeserializeGeoLocTransformer(psTree);
4709 : }
4710 158 : else if (EQUAL(psTree->pszValue, "RPCTransformer"))
4711 : {
4712 0 : *ppfnFunc = GDALRPCTransform;
4713 0 : *ppTransformArg = GDALDeserializeRPCTransformer(psTree);
4714 : }
4715 158 : else if (EQUAL(psTree->pszValue, "ApproxTransformer"))
4716 : {
4717 151 : *ppfnFunc = GDALApproxTransform;
4718 151 : *ppTransformArg = GDALDeserializeApproxTransformer(psTree);
4719 : }
4720 7 : else if (EQUAL(psTree->pszValue, "HomographyTransformer"))
4721 : {
4722 7 : *ppfnFunc = GDALHomographyTransform;
4723 7 : *ppTransformArg = GDALDeserializeHomographyTransformer(psTree);
4724 : }
4725 : else
4726 : {
4727 0 : GDALTransformDeserializeFunc pfnDeserializeFunc = nullptr;
4728 : {
4729 0 : CPLMutexHolderD(&hDeserializerMutex);
4730 0 : CPLList *psList = psListDeserializer;
4731 0 : while (psList)
4732 : {
4733 0 : TransformDeserializerInfo *psInfo =
4734 : static_cast<TransformDeserializerInfo *>(psList->pData);
4735 0 : if (strcmp(psInfo->pszTransformName, psTree->pszValue) == 0)
4736 : {
4737 0 : *ppfnFunc = psInfo->pfnTransformerFunc;
4738 0 : pfnDeserializeFunc = psInfo->pfnDeserializeFunc;
4739 0 : break;
4740 : }
4741 0 : psList = psList->psNext;
4742 : }
4743 : }
4744 :
4745 0 : if (pfnDeserializeFunc != nullptr)
4746 : {
4747 0 : *ppTransformArg = pfnDeserializeFunc(psTree);
4748 : }
4749 : else
4750 : {
4751 0 : CPLError(CE_Failure, CPLE_AppDefined,
4752 : "Unrecognized element '%s' GDALDeserializeTransformer",
4753 : psTree->pszValue);
4754 : }
4755 : }
4756 :
4757 551 : return CPLGetLastErrorType();
4758 : }
4759 :
4760 : /************************************************************************/
4761 : /* GDALDestroyTransformer() */
4762 : /************************************************************************/
4763 :
4764 4151 : void GDALDestroyTransformer(void *pTransformArg)
4765 :
4766 : {
4767 4151 : if (pTransformArg == nullptr)
4768 0 : return;
4769 :
4770 4151 : GDALTransformerInfo *psInfo =
4771 : static_cast<GDALTransformerInfo *>(pTransformArg);
4772 :
4773 4151 : if (memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4774 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4775 : {
4776 0 : CPLError(CE_Failure, CPLE_AppDefined,
4777 : "Attempt to destroy non-GTI2 transformer.");
4778 0 : return;
4779 : }
4780 :
4781 4151 : psInfo->pfnCleanup(pTransformArg);
4782 : }
4783 :
4784 : /************************************************************************/
4785 : /* GDALUseTransformer() */
4786 : /************************************************************************/
4787 :
4788 8683 : int GDALUseTransformer(void *pTransformArg, int bDstToSrc, int nPointCount,
4789 : double *x, double *y, double *z, int *panSuccess)
4790 : {
4791 8683 : GDALTransformerInfo *psInfo =
4792 : static_cast<GDALTransformerInfo *>(pTransformArg);
4793 :
4794 8683 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4795 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4796 : {
4797 0 : CPLError(CE_Failure, CPLE_AppDefined,
4798 : "Attempt to use non-GTI2 transformer.");
4799 0 : return FALSE;
4800 : }
4801 :
4802 8683 : return psInfo->pfnTransform(pTransformArg, bDstToSrc, nPointCount, x, y, z,
4803 8683 : panSuccess);
4804 : }
4805 :
4806 : /************************************************************************/
4807 : /* GDALCloneTransformer() */
4808 : /************************************************************************/
4809 :
4810 39 : void *GDALCloneTransformer(void *pTransformArg)
4811 : {
4812 39 : GDALTransformerInfo *psInfo =
4813 : static_cast<GDALTransformerInfo *>(pTransformArg);
4814 :
4815 39 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4816 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4817 : {
4818 0 : CPLError(CE_Failure, CPLE_AppDefined,
4819 : "Attempt to clone non-GTI2 transformer.");
4820 0 : return nullptr;
4821 : }
4822 :
4823 39 : if (psInfo->pfnCreateSimilar != nullptr)
4824 : {
4825 20 : return psInfo->pfnCreateSimilar(psInfo, 1.0, 1.0);
4826 : }
4827 :
4828 19 : if (psInfo->pfnSerialize == nullptr)
4829 : {
4830 0 : CPLError(CE_Failure, CPLE_AppDefined,
4831 : "No serialization function available for this transformer.");
4832 0 : return nullptr;
4833 : }
4834 :
4835 19 : CPLXMLNode *pSerialized = psInfo->pfnSerialize(pTransformArg);
4836 19 : if (pSerialized == nullptr)
4837 0 : return nullptr;
4838 19 : GDALTransformerFunc pfnTransformer = nullptr;
4839 19 : void *pClonedTransformArg = nullptr;
4840 19 : if (GDALDeserializeTransformer(pSerialized, &pfnTransformer,
4841 19 : &pClonedTransformArg) != CE_None)
4842 : {
4843 0 : CPLDestroyXMLNode(pSerialized);
4844 0 : CPLFree(pClonedTransformArg);
4845 0 : return nullptr;
4846 : }
4847 :
4848 19 : CPLDestroyXMLNode(pSerialized);
4849 19 : return pClonedTransformArg;
4850 : }
4851 :
4852 : /************************************************************************/
4853 : /* GDALCreateSimilarTransformer() */
4854 : /************************************************************************/
4855 :
4856 52 : void *GDALCreateSimilarTransformer(void *pTransformArg, double dfRatioX,
4857 : double dfRatioY)
4858 : {
4859 52 : GDALTransformerInfo *psInfo =
4860 : static_cast<GDALTransformerInfo *>(pTransformArg);
4861 :
4862 52 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4863 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4864 : {
4865 0 : CPLError(CE_Failure, CPLE_AppDefined,
4866 : "Attempt to call CreateSimilar on a non-GTI2 transformer.");
4867 0 : return nullptr;
4868 : }
4869 :
4870 52 : if (psInfo->pfnCreateSimilar == nullptr)
4871 : {
4872 0 : CPLError(CE_Failure, CPLE_AppDefined,
4873 : "No CreateSimilar function available for this transformer.");
4874 0 : return nullptr;
4875 : }
4876 :
4877 52 : return psInfo->pfnCreateSimilar(psInfo, dfRatioX, dfRatioY);
4878 : }
4879 :
4880 : /************************************************************************/
4881 : /* GetGenImgProjTransformInfo() */
4882 : /************************************************************************/
4883 :
4884 44 : static GDALTransformerInfo *GetGenImgProjTransformInfo(const char *pszFunc,
4885 : void *pTransformArg)
4886 : {
4887 44 : GDALTransformerInfo *psInfo =
4888 : static_cast<GDALTransformerInfo *>(pTransformArg);
4889 :
4890 44 : if (psInfo == nullptr || memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4891 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4892 : {
4893 0 : CPLError(CE_Failure, CPLE_AppDefined,
4894 : "Attempt to call %s on "
4895 : "a non-GTI2 transformer.",
4896 : pszFunc);
4897 0 : return nullptr;
4898 : }
4899 :
4900 44 : if (EQUAL(psInfo->pszClassName, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
4901 : {
4902 14 : GDALApproxTransformInfo *psATInfo =
4903 : static_cast<GDALApproxTransformInfo *>(pTransformArg);
4904 14 : psInfo = static_cast<GDALTransformerInfo *>(psATInfo->pBaseCBData);
4905 :
4906 14 : if (psInfo == nullptr ||
4907 14 : memcmp(psInfo->abySignature, GDAL_GTI2_SIGNATURE,
4908 : strlen(GDAL_GTI2_SIGNATURE)) != 0)
4909 : {
4910 0 : CPLError(CE_Failure, CPLE_AppDefined,
4911 : "Attempt to call %s on "
4912 : "a non-GTI2 transformer.",
4913 : pszFunc);
4914 0 : return nullptr;
4915 : }
4916 : }
4917 :
4918 44 : if (EQUAL(psInfo->pszClassName, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
4919 : {
4920 44 : return psInfo;
4921 : }
4922 :
4923 0 : return nullptr;
4924 : }
4925 :
4926 : /************************************************************************/
4927 : /* GDALSetTransformerDstGeoTransform() */
4928 : /************************************************************************/
4929 :
4930 : /**
4931 : * Set ApproxTransformer or GenImgProj output geotransform.
4932 : *
4933 : * This is a layer above GDALSetGenImgProjTransformerDstGeoTransform() that
4934 : * checks that the passed hTransformArg is compatible.
4935 : *
4936 : * Normally the "destination geotransform", or transformation between
4937 : * georeferenced output coordinates and pixel/line coordinates on the
4938 : * destination file is extracted from the destination file by
4939 : * GDALCreateGenImgProjTransformer() and stored in the GenImgProj private
4940 : * info. However, sometimes it is inconvenient to have an output file
4941 : * handle with appropriate geotransform information when creating the
4942 : * transformation. For these cases, this function can be used to apply
4943 : * the destination geotransform.
4944 : *
4945 : * @param pTransformArg the handle to update.
4946 : * @param padfGeoTransform the destination geotransform to apply (six doubles).
4947 : */
4948 :
4949 22 : void GDALSetTransformerDstGeoTransform(void *pTransformArg,
4950 : const double *padfGeoTransform)
4951 : {
4952 22 : VALIDATE_POINTER0(pTransformArg, "GDALSetTransformerDstGeoTransform");
4953 :
4954 22 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
4955 : "GDALSetTransformerDstGeoTransform", pTransformArg);
4956 22 : if (psInfo)
4957 : {
4958 22 : GDALSetGenImgProjTransformerDstGeoTransform(psInfo, padfGeoTransform);
4959 : }
4960 : }
4961 :
4962 : /************************************************************************/
4963 : /* GDALGetTransformerDstGeoTransform() */
4964 : /************************************************************************/
4965 :
4966 : /**
4967 : * Get ApproxTransformer or GenImgProj output geotransform.
4968 : *
4969 : * @param pTransformArg transformer handle.
4970 : * @param padfGeoTransform (output) the destination geotransform to return (six
4971 : * doubles).
4972 : */
4973 :
4974 22 : void GDALGetTransformerDstGeoTransform(void *pTransformArg,
4975 : double *padfGeoTransform)
4976 : {
4977 22 : VALIDATE_POINTER0(pTransformArg, "GDALGetTransformerDstGeoTransform");
4978 :
4979 22 : GDALTransformerInfo *psInfo = GetGenImgProjTransformInfo(
4980 : "GDALGetTransformerDstGeoTransform", pTransformArg);
4981 22 : if (psInfo)
4982 : {
4983 22 : GDALGenImgProjTransformInfo *psGenImgProjInfo =
4984 : reinterpret_cast<GDALGenImgProjTransformInfo *>(psInfo);
4985 :
4986 22 : memcpy(padfGeoTransform, psGenImgProjInfo->sDstParams.adfGeoTransform,
4987 : sizeof(double) * 6);
4988 : }
4989 : }
4990 :
4991 : /************************************************************************/
4992 : /* GDALTransformIsTranslationOnPixelBoundaries() */
4993 : /************************************************************************/
4994 :
4995 1529 : bool GDALTransformIsTranslationOnPixelBoundaries(GDALTransformerFunc,
4996 : void *pTransformerArg)
4997 : {
4998 1529 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
4999 : {
5000 1199 : const auto *pApproxInfo =
5001 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5002 1199 : pTransformerArg = pApproxInfo->pBaseCBData;
5003 : }
5004 1529 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5005 : {
5006 1376 : const auto *pGenImgpProjInfo =
5007 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5008 446 : const auto IsCloseToInteger = [](double dfVal)
5009 446 : { return std::fabs(dfVal - std::round(dfVal)) <= 1e-6; };
5010 2672 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5011 1296 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5012 1294 : pGenImgpProjInfo->pReproject == nullptr &&
5013 526 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[1] ==
5014 526 : pGenImgpProjInfo->sDstParams.adfGeoTransform[1] &&
5015 275 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[5] ==
5016 275 : pGenImgpProjInfo->sDstParams.adfGeoTransform[5] &&
5017 241 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] ==
5018 241 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] &&
5019 241 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] ==
5020 482 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] &&
5021 : // Check that the georeferenced origin of the destination
5022 : // geotransform is close to be an integer value when transformed
5023 : // to source image coordinates
5024 241 : IsCloseToInteger(
5025 241 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[0] +
5026 241 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5027 241 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[1] +
5028 241 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5029 2913 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[2]) &&
5030 205 : IsCloseToInteger(
5031 205 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[3] +
5032 205 : pGenImgpProjInfo->sDstParams.adfGeoTransform[0] *
5033 205 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[4] +
5034 205 : pGenImgpProjInfo->sDstParams.adfGeoTransform[3] *
5035 1581 : pGenImgpProjInfo->sSrcParams.adfInvGeoTransform[5]);
5036 : }
5037 153 : return false;
5038 : }
5039 :
5040 : /************************************************************************/
5041 : /* GDALTransformIsAffineNoRotation() */
5042 : /************************************************************************/
5043 :
5044 18 : bool GDALTransformIsAffineNoRotation(GDALTransformerFunc, void *pTransformerArg)
5045 : {
5046 18 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5047 : {
5048 18 : const auto *pApproxInfo =
5049 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5050 18 : pTransformerArg = pApproxInfo->pBaseCBData;
5051 : }
5052 18 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5053 : {
5054 18 : const auto *pGenImgpProjInfo =
5055 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5056 36 : return pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr &&
5057 18 : pGenImgpProjInfo->sDstParams.pTransformArg == nullptr &&
5058 18 : pGenImgpProjInfo->pReproject == nullptr &&
5059 8 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[2] == 0 &&
5060 8 : pGenImgpProjInfo->sSrcParams.adfGeoTransform[4] == 0 &&
5061 44 : pGenImgpProjInfo->sDstParams.adfGeoTransform[2] == 0 &&
5062 26 : pGenImgpProjInfo->sDstParams.adfGeoTransform[4] == 0;
5063 : }
5064 0 : return false;
5065 : }
5066 :
5067 : /************************************************************************/
5068 : /* GDALTransformHasFastClone() */
5069 : /************************************************************************/
5070 :
5071 : /** Returns whether GDALCloneTransformer() on this transformer is
5072 : * "fast"
5073 : * Counter-examples are GCPs or TPSs transformers.
5074 : */
5075 2 : bool GDALTransformHasFastClone(void *pTransformerArg)
5076 : {
5077 2 : if (GDALIsTransformer(pTransformerArg, GDAL_APPROX_TRANSFORMER_CLASS_NAME))
5078 : {
5079 1 : const auto *pApproxInfo =
5080 : static_cast<const GDALApproxTransformInfo *>(pTransformerArg);
5081 1 : pTransformerArg = pApproxInfo->pBaseCBData;
5082 : // Fallback to next lines
5083 : }
5084 :
5085 2 : if (GDALIsTransformer(pTransformerArg, GDAL_GEN_IMG_TRANSFORMER_CLASS_NAME))
5086 : {
5087 2 : const auto *pGenImgpProjInfo =
5088 : static_cast<GDALGenImgProjTransformInfo *>(pTransformerArg);
5089 2 : return (pGenImgpProjInfo->sSrcParams.pTransformArg == nullptr ||
5090 0 : GDALTransformHasFastClone(
5091 4 : pGenImgpProjInfo->sSrcParams.pTransformArg)) &&
5092 2 : (pGenImgpProjInfo->sDstParams.pTransformArg == nullptr ||
5093 0 : GDALTransformHasFastClone(
5094 2 : pGenImgpProjInfo->sDstParams.pTransformArg));
5095 : }
5096 0 : else if (GDALIsTransformer(pTransformerArg,
5097 : GDAL_RPC_TRANSFORMER_CLASS_NAME))
5098 : {
5099 0 : return true;
5100 : }
5101 : else
5102 : {
5103 0 : return false;
5104 : }
5105 : }
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