/** * GDALReprojectImage() method with a ChunkAndWarpImage replaced with ChunkAndWarpMulti */ CPLErr GDALReprojectImageMulti( GDALDatasetH hSrcDS, const char *pszSrcWKT, GDALDatasetH hDstDS, const char *pszDstWKT, GDALResampleAlg eResampleAlg, double dfWarpMemoryLimit, double dfMaxError, GDALProgressFunc pfnProgress, void *pProgressArg, GDALWarpOptions *psOptions ) { GDALWarpOptions *psWOptions; /* -------------------------------------------------------------------- */ /* Setup a reprojection based transformer. */ /* -------------------------------------------------------------------- */ void *hTransformArg; hTransformArg = GDALCreateGenImgProjTransformer( hSrcDS, pszSrcWKT, hDstDS, pszDstWKT, TRUE, 1000.0, 0 ); if( hTransformArg == NULL ) return CE_Failure; /* -------------------------------------------------------------------- */ /* Create a copy of the user provided options, or a defaulted */ /* options structure. */ /* -------------------------------------------------------------------- */ if( psOptions == NULL ) psWOptions = GDALCreateWarpOptions(); else psWOptions = GDALCloneWarpOptions( psOptions ); psWOptions->eResampleAlg = eResampleAlg; /* -------------------------------------------------------------------- */ /* Set transform. */ /* -------------------------------------------------------------------- */ if( dfMaxError > 0.0 ) { psWOptions->pTransformerArg = GDALCreateApproxTransformer( GDALGenImgProjTransform, hTransformArg, dfMaxError ); psWOptions->pfnTransformer = GDALApproxTransform; } else { psWOptions->pfnTransformer = GDALGenImgProjTransform; psWOptions->pTransformerArg = hTransformArg; } /* -------------------------------------------------------------------- */ /* Set file and band mapping. */ /* -------------------------------------------------------------------- */ int iBand; psWOptions->hSrcDS = hSrcDS; psWOptions->hDstDS = hDstDS; if( psWOptions->nBandCount == 0 ) { psWOptions->nBandCount = MIN(GDALGetRasterCount(hSrcDS), GDALGetRasterCount(hDstDS)); psWOptions->panSrcBands = (int *) CPLMalloc(sizeof(int) * psWOptions->nBandCount); psWOptions->panDstBands = (int *) CPLMalloc(sizeof(int) * psWOptions->nBandCount); for( iBand = 0; iBand < psWOptions->nBandCount; iBand++ ) { psWOptions->panSrcBands[iBand] = iBand+1; psWOptions->panDstBands[iBand] = iBand+1; } } /* -------------------------------------------------------------------- */ /* Set source nodata values if the source dataset seems to have */ /* any. Same for target nodata values */ /* -------------------------------------------------------------------- */ for( iBand = 0; iBand < psWOptions->nBandCount; iBand++ ) { GDALRasterBandH hBand = GDALGetRasterBand( hSrcDS, iBand+1 ); int bGotNoData = FALSE; double dfNoDataValue; if (GDALGetRasterColorInterpretation(hBand) == GCI_AlphaBand) { psWOptions->nSrcAlphaBand = iBand + 1; } dfNoDataValue = GDALGetRasterNoDataValue( hBand, &bGotNoData ); if( bGotNoData ) { if( psWOptions->padfSrcNoDataReal == NULL ) { int ii; psWOptions->padfSrcNoDataReal = (double *) CPLMalloc(sizeof(double) * psWOptions->nBandCount); psWOptions->padfSrcNoDataImag = (double *) CPLMalloc(sizeof(double) * psWOptions->nBandCount); for( ii = 0; ii < psWOptions->nBandCount; ii++ ) { psWOptions->padfSrcNoDataReal[ii] = -1.1e20; psWOptions->padfSrcNoDataImag[ii] = 0.0; } } psWOptions->padfSrcNoDataReal[iBand] = dfNoDataValue; } // Deal with target band hBand = GDALGetRasterBand( hDstDS, iBand+1 ); if (hBand && GDALGetRasterColorInterpretation(hBand) == GCI_AlphaBand) { psWOptions->nDstAlphaBand = iBand + 1; } dfNoDataValue = GDALGetRasterNoDataValue( hBand, &bGotNoData ); if( bGotNoData ) { if( psWOptions->padfDstNoDataReal == NULL ) { int ii; psWOptions->padfDstNoDataReal = (double *) CPLMalloc(sizeof(double) * psWOptions->nBandCount); psWOptions->padfDstNoDataImag = (double *) CPLMalloc(sizeof(double) * psWOptions->nBandCount); for( ii = 0; ii < psWOptions->nBandCount; ii++ ) { psWOptions->padfDstNoDataReal[ii] = -1.1e20; psWOptions->padfDstNoDataImag[ii] = 0.0; } } psWOptions->padfDstNoDataReal[iBand] = dfNoDataValue; } } /* -------------------------------------------------------------------- */ /* Set the progress function. */ /* -------------------------------------------------------------------- */ if( pfnProgress != NULL ) { psWOptions->pfnProgress = pfnProgress; psWOptions->pProgressArg = pProgressArg; } /* -------------------------------------------------------------------- */ /* Create a warp options based on the options. */ /* -------------------------------------------------------------------- */ GDALWarpOperation oWarper; CPLErr eErr; eErr = oWarper.Initialize( psWOptions ); if( eErr == CE_None ) eErr = oWarper.ChunkAndWarpMulti( 0, 0, GDALGetRasterXSize(hDstDS), GDALGetRasterYSize(hDstDS) ); /* -------------------------------------------------------------------- */ /* Cleanup. */ /* -------------------------------------------------------------------- */ GDALDestroyGenImgProjTransformer( hTransformArg ); if( dfMaxError > 0.0 ) GDALDestroyApproxTransformer( psWOptions->pTransformerArg ); GDALDestroyWarpOptions( psWOptions ); return eErr; }
GDALDatasetH CPL_STDCALL GDALAutoCreateWarpedVRT( GDALDatasetH hSrcDS, const char *pszSrcWKT, const char *pszDstWKT, GDALResampleAlg eResampleAlg, double dfMaxError, const GDALWarpOptions *psOptionsIn ) { GDALWarpOptions *psWO; int i; VALIDATE_POINTER1( hSrcDS, "GDALAutoCreateWarpedVRT", NULL ); /* -------------------------------------------------------------------- */ /* Populate the warp options. */ /* -------------------------------------------------------------------- */ if( psOptionsIn != NULL ) psWO = GDALCloneWarpOptions( psOptionsIn ); else psWO = GDALCreateWarpOptions(); psWO->eResampleAlg = eResampleAlg; psWO->hSrcDS = hSrcDS; psWO->nBandCount = GDALGetRasterCount( hSrcDS ); psWO->panSrcBands = (int *) CPLMalloc(sizeof(int) * psWO->nBandCount); psWO->panDstBands = (int *) CPLMalloc(sizeof(int) * psWO->nBandCount); for( i = 0; i < psWO->nBandCount; i++ ) { psWO->panSrcBands[i] = i+1; psWO->panDstBands[i] = i+1; } /* TODO: should fill in no data where available */ /* -------------------------------------------------------------------- */ /* Create the transformer. */ /* -------------------------------------------------------------------- */ psWO->pfnTransformer = GDALGenImgProjTransform; psWO->pTransformerArg = GDALCreateGenImgProjTransformer( psWO->hSrcDS, pszSrcWKT, NULL, pszDstWKT, TRUE, 1.0, 0 ); if( psWO->pTransformerArg == NULL ) { GDALDestroyWarpOptions( psWO ); return NULL; } /* -------------------------------------------------------------------- */ /* Figure out the desired output bounds and resolution. */ /* -------------------------------------------------------------------- */ double adfDstGeoTransform[6]; int nDstPixels, nDstLines; CPLErr eErr; eErr = GDALSuggestedWarpOutput( hSrcDS, psWO->pfnTransformer, psWO->pTransformerArg, adfDstGeoTransform, &nDstPixels, &nDstLines ); /* -------------------------------------------------------------------- */ /* Update the transformer to include an output geotransform */ /* back to pixel/line coordinates. */ /* */ /* -------------------------------------------------------------------- */ GDALSetGenImgProjTransformerDstGeoTransform( psWO->pTransformerArg, adfDstGeoTransform ); /* -------------------------------------------------------------------- */ /* Do we want to apply an approximating transformation? */ /* -------------------------------------------------------------------- */ if( dfMaxError > 0.0 ) { psWO->pTransformerArg = GDALCreateApproxTransformer( psWO->pfnTransformer, psWO->pTransformerArg, dfMaxError ); psWO->pfnTransformer = GDALApproxTransform; } /* -------------------------------------------------------------------- */ /* Create the VRT file. */ /* -------------------------------------------------------------------- */ GDALDatasetH hDstDS; hDstDS = GDALCreateWarpedVRT( hSrcDS, nDstPixels, nDstLines, adfDstGeoTransform, psWO ); GDALDestroyWarpOptions( psWO ); if( pszDstWKT != NULL ) GDALSetProjection( hDstDS, pszDstWKT ); else if( pszSrcWKT != NULL ) GDALSetProjection( hDstDS, pszDstWKT ); else if( GDALGetGCPCount( hSrcDS ) > 0 ) GDALSetProjection( hDstDS, GDALGetGCPProjection( hSrcDS ) ); else GDALSetProjection( hDstDS, GDALGetProjectionRef( hSrcDS ) ); return hDstDS; }