Ejemplo n.º 1
0
CPLErr VRTRasterBand::CreateMaskBand( int nFlags )
{
    VRTDataset* poGDS = (VRTDataset *)poDS;
    
    if (poGDS->poMaskBand)
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Cannot create mask band at raster band level when a dataset mask band already exists." );
        return CE_Failure;
    }
    
    if (poMaskBand != NULL)
    {
        CPLError(CE_Failure, CPLE_AppDefined,
                 "This VRT band has already a mask band");
        return CE_Failure;
    }
    
    if ((nFlags & GMF_PER_DATASET) != 0)
        return poGDS->CreateMaskBand(nFlags);

    SetMaskBand(new VRTSourcedRasterBand( poGDS, 0 ));

    return CE_None;
}
static int ProxyMain(int argc, char **argv)

{
    GDALDatasetH     hDataset, hOutDS;
    int              i;
    int              nRasterXSize, nRasterYSize;
    const char       *pszSource = NULL, *pszDest = NULL, *pszFormat = "GTiff";
    GDALDriverH      hDriver;
    int              *panBandList = NULL;    /* negative value of panBandList[i] means mask band of ABS(panBandList[i]) */
    int              nBandCount   = 0, bDefBands = TRUE;
    double           adfGeoTransform[6];
    GDALDataType     eOutputType          = GDT_Unknown;
    int              nOXSize              = 0, nOYSize = 0;
    char             *pszOXSize           = NULL, *pszOYSize = NULL;
    char             **papszCreateOptions = NULL;
    int              anSrcWin[4], bStrict = FALSE;
    const char       *pszProjection;
    int              bScale        = FALSE, bHaveScaleSrc = FALSE, bUnscale = FALSE;
    double           dfScaleSrcMin = 0.0, dfScaleSrcMax = 255.0;
    double           dfScaleDstMin = 0.0, dfScaleDstMax = 255.0;
    double           dfULX, dfULY, dfLRX, dfLRY;
    char             **papszMetadataOptions = NULL;
    char             *pszOutputSRS          = NULL;
    int              bQuiet                 = FALSE, bGotBounds = FALSE;
    GDALProgressFunc pfnProgress            = GDALTermProgress;
    int              nGCPCount              = 0;
    GDAL_GCP         *pasGCPs               = NULL;
    int              iSrcFileArg            = -1, iDstFileArg = -1;
    int              bCopySubDatasets       = FALSE;
    double           adfULLR[4]             = { 0, 0, 0, 0 };
    int              bSetNoData             = FALSE;
    int              bUnsetNoData           = FALSE;
    double           dfNoDataReal           = 0.0;
    int              nRGBExpand             = 0;
    int              bParsedMaskArgument    = FALSE;
    int              eMaskMode              = MASK_AUTO;
    int              nMaskBand              = 0; /* negative value means mask band of ABS(nMaskBand) */
    int              bStats                 = FALSE, bApproxStats = FALSE;


    anSrcWin[0] = 0;
    anSrcWin[1] = 0;
    anSrcWin[2] = 0;
    anSrcWin[3] = 0;

    dfULX = dfULY = dfLRX = dfLRY = 0.0;

    /* Check strict compilation and runtime library version as we use C++ API */
    if (!GDAL_CHECK_VERSION(argv[0]))
        exit(1);

    /* Must process GDAL_SKIP before GDALAllRegister(), but we can't call */
    /* GDALGeneralCmdLineProcessor before it needs the drivers to be registered */
    /* for the --format or --formats options */
    for (i = 1; i < argc; i++)
    {
        if (EQUAL(argv[i], "--config") && i + 2 < argc && EQUAL(argv[i + 1], "GDAL_SKIP"))
        {
            CPLSetConfigOption(argv[i + 1], argv[i + 2]);

            i += 2;
        }
    }

/* -------------------------------------------------------------------- */
/*      Register standard GDAL drivers, and process generic GDAL        */
/*      command options.                                                */
/* -------------------------------------------------------------------- */
    GDALAllRegister();
    argc = GDALGeneralCmdLineProcessor(argc, &argv, 0);
    if (argc < 1)
        exit(-argc);

/* -------------------------------------------------------------------- */
/*      Handle command line arguments.                                  */
/* -------------------------------------------------------------------- */
    for (i = 1; i < argc; i++)
    {
        if (EQUAL(argv[i], "--utility_version"))
        {
            printf("%s was compiled against GDAL %s and is running against GDAL %s\n",
                   argv[0], GDAL_RELEASE_NAME, GDALVersionInfo("RELEASE_NAME"));
            return 0;
        }
        else if (EQUAL(argv[i], "-of") && i < argc - 1)
            pszFormat = argv[++i];

        else if (EQUAL(argv[i], "-q") || EQUAL(argv[i], "-quiet"))
        {
            bQuiet      = TRUE;
            pfnProgress = GDALDummyProgress;
        }

        else if (EQUAL(argv[i], "-ot") && i < argc - 1)
        {
            int iType;

            for (iType = 1; iType < GDT_TypeCount; iType++)
            {
                if (GDALGetDataTypeName((GDALDataType)iType) != NULL
                    && EQUAL(GDALGetDataTypeName((GDALDataType)iType),
                             argv[i + 1]))
                {
                    eOutputType = (GDALDataType) iType;
                }
            }

            if (eOutputType == GDT_Unknown)
            {
                printf("Unknown output pixel type: %s\n", argv[i + 1]);
                Usage();
                GDALDestroyDriverManager();
                exit(2);
            }

            i++;
        }
        else if (EQUAL(argv[i], "-b") && i < argc - 1)
        {
            const char *pszBand = argv[i + 1];
            int        bMask    = FALSE;
            if (EQUAL(pszBand, "mask"))
                pszBand = "mask,1";

            if (EQUALN(pszBand, "mask,", 5))
            {
                bMask    = TRUE;
                pszBand += 5;
                /* If we use tha source mask band as a regular band */
                /* don't create a target mask band by default */
                if (!bParsedMaskArgument)
                    eMaskMode = MASK_DISABLED;
            }

            int nBand = atoi(pszBand);
            if (nBand < 1)
            {
                printf("Unrecognizable band number (%s).\n", argv[i + 1]);
                Usage();
                GDALDestroyDriverManager();
                exit(2);
            }

            i++;

            nBandCount++;
            panBandList = (int*)
                          CPLRealloc(panBandList, sizeof(int) * nBandCount);
            panBandList[nBandCount - 1] = nBand;
            if (bMask)
                panBandList[nBandCount - 1] *= -1;

            if (panBandList[nBandCount - 1] != nBandCount)
                bDefBands = FALSE;
        }
        else if (EQUAL(argv[i], "-mask") && i < argc - 1)
        {
            bParsedMaskArgument = TRUE;
            const char *pszBand = argv[i + 1];
            if (EQUAL(pszBand, "none"))
            {
                eMaskMode = MASK_DISABLED;
            }
            else if (EQUAL(pszBand, "auto"))
            {
                eMaskMode = MASK_AUTO;
            }
            else
            {
                int bMask = FALSE;
                if (EQUAL(pszBand, "mask"))
                    pszBand = "mask,1";

                if (EQUALN(pszBand, "mask,", 5))
                {
                    bMask    = TRUE;
                    pszBand += 5;
                }

                int nBand = atoi(pszBand);
                if (nBand < 1)
                {
                    printf("Unrecognizable band number (%s).\n", argv[i + 1]);
                    Usage();
                    GDALDestroyDriverManager();
                    exit(2);
                }

                eMaskMode = MASK_USER;
                nMaskBand = nBand;
                if (bMask)
                    nMaskBand *= -1;
            }

            i++;
        }
        else if (EQUAL(argv[i], "-not_strict"))
            bStrict = FALSE;

        else if (EQUAL(argv[i], "-strict"))
            bStrict = TRUE;

        else if (EQUAL(argv[i], "-sds"))
            bCopySubDatasets = TRUE;

        else if (EQUAL(argv[i], "-gcp") && i < argc - 4)
        {
            char *endptr = NULL;
            /* -gcp pixel line easting northing [elev] */

            nGCPCount++;
            pasGCPs = (GDAL_GCP*)
                      CPLRealloc(pasGCPs, sizeof(GDAL_GCP) * nGCPCount);
            GDALInitGCPs(1, pasGCPs + nGCPCount - 1);

            pasGCPs[nGCPCount - 1].dfGCPPixel = CPLAtofM(argv[++i]);
            pasGCPs[nGCPCount - 1].dfGCPLine  = CPLAtofM(argv[++i]);
            pasGCPs[nGCPCount - 1].dfGCPX     = CPLAtofM(argv[++i]);
            pasGCPs[nGCPCount - 1].dfGCPY     = CPLAtofM(argv[++i]);
            if (argv[i + 1] != NULL
                && (CPLStrtod(argv[i + 1], &endptr) != 0.0 || argv[i + 1][0] == '0'))
            {
                /* Check that last argument is really a number and not a filename */
                /* looking like a number (see ticket #863) */
                if (endptr && *endptr == 0)
                    pasGCPs[nGCPCount - 1].dfGCPZ = CPLAtofM(argv[++i]);
            }

            /* should set id and info? */
        }

        else if (EQUAL(argv[i], "-a_nodata") && i < argc - 1)
        {
            if (EQUAL(argv[i + 1], "none"))
            {
                bUnsetNoData = TRUE;
            }
            else
            {
                bSetNoData   = TRUE;
                dfNoDataReal = CPLAtofM(argv[i + 1]);
            }

            i += 1;
        }

        else if (EQUAL(argv[i], "-a_ullr") && i < argc - 4)
        {
            adfULLR[0] = CPLAtofM(argv[i + 1]);
            adfULLR[1] = CPLAtofM(argv[i + 2]);
            adfULLR[2] = CPLAtofM(argv[i + 3]);
            adfULLR[3] = CPLAtofM(argv[i + 4]);

            bGotBounds = TRUE;

            i += 4;
        }

        else if (EQUAL(argv[i], "-co") && i < argc - 1)
        {
            papszCreateOptions = CSLAddString(papszCreateOptions, argv[++i]);
        }

        else if (EQUAL(argv[i], "-scale"))
        {
            bScale = TRUE;
            if (i < argc - 2 && ArgIsNumeric(argv[i + 1]))
            {
                bHaveScaleSrc = TRUE;
                dfScaleSrcMin = CPLAtofM(argv[i + 1]);
                dfScaleSrcMax = CPLAtofM(argv[i + 2]);
                i            += 2;
            }

            if (i < argc - 2 && bHaveScaleSrc && ArgIsNumeric(argv[i + 1]))
            {
                dfScaleDstMin = CPLAtofM(argv[i + 1]);
                dfScaleDstMax = CPLAtofM(argv[i + 2]);
                i            += 2;
            }
            else
            {
                dfScaleDstMin = 0.0;
                dfScaleDstMax = 255.999;
            }
        }

        else if (EQUAL(argv[i], "-unscale"))
        {
            bUnscale = TRUE;
        }

        else if (EQUAL(argv[i], "-mo") && i < argc - 1)
        {
            papszMetadataOptions = CSLAddString(papszMetadataOptions,
                                                argv[++i]);
        }

        else if (EQUAL(argv[i], "-outsize") && i < argc - 2)
        {
            pszOXSize = argv[++i];
            pszOYSize = argv[++i];
        }

        else if (EQUAL(argv[i], "-srcwin") && i < argc - 4)
        {
            anSrcWin[0] = atoi(argv[++i]);
            anSrcWin[1] = atoi(argv[++i]);
            anSrcWin[2] = atoi(argv[++i]);
            anSrcWin[3] = atoi(argv[++i]);
        }

        else if (EQUAL(argv[i], "-projwin") && i < argc - 4)
        {
            dfULX = CPLAtofM(argv[++i]);
            dfULY = CPLAtofM(argv[++i]);
            dfLRX = CPLAtofM(argv[++i]);
            dfLRY = CPLAtofM(argv[++i]);
        }

        else if (EQUAL(argv[i], "-a_srs") && i < argc - 1)
        {
            OGRSpatialReference oOutputSRS;

            if (oOutputSRS.SetFromUserInput(argv[i + 1]) != OGRERR_NONE)
            {
                fprintf(stderr, "Failed to process SRS definition: %s\n",
                        argv[i + 1]);
                GDALDestroyDriverManager();
                exit(1);
            }

            oOutputSRS.exportToWkt(&pszOutputSRS);
            i++;
        }

        else if (EQUAL(argv[i], "-expand") && i < argc - 1)
        {
            if (EQUAL(argv[i + 1], "gray"))
                nRGBExpand = 1;
            else if (EQUAL(argv[i + 1], "rgb"))
                nRGBExpand = 3;
            else if (EQUAL(argv[i + 1], "rgba"))
                nRGBExpand = 4;
            else
            {
                printf("Value %s unsupported. Only gray, rgb or rgba are supported.\n\n",
                       argv[i]);
                Usage();
                GDALDestroyDriverManager();
                exit(2);
            }

            i++;
        }

        else if (EQUAL(argv[i], "-stats"))
        {
            bStats       = TRUE;
            bApproxStats = FALSE;
        }
        else if (EQUAL(argv[i], "-approx_stats"))
        {
            bStats       = TRUE;
            bApproxStats = TRUE;
        }

        else if (argv[i][0] == '-')
        {
            printf("Option %s incomplete, or not recognised.\n\n",
                   argv[i]);
            Usage();
            GDALDestroyDriverManager();
            exit(2);
        }
        else if (pszSource == NULL)
        {
            iSrcFileArg = i;
            pszSource   = argv[i];
        }
        else if (pszDest == NULL)
        {
            pszDest     = argv[i];
            iDstFileArg = i;
        }

        else
        {
            printf("Too many command options.\n\n");
            Usage();
            GDALDestroyDriverManager();
            exit(2);
        }
    }

    if (pszDest == NULL)
    {
        Usage();
        GDALDestroyDriverManager();
        exit(10);
    }

    if (strcmp(pszSource, pszDest) == 0)
    {
        fprintf(stderr, "Source and destination datasets must be different.\n");
        GDALDestroyDriverManager();
        exit(1);
    }

    if (strcmp(pszDest, "/vsistdout/") == 0)
    {
        bQuiet      = TRUE;
        pfnProgress = GDALDummyProgress;
    }

/* -------------------------------------------------------------------- */
/*      Attempt to open source file.                                    */
/* -------------------------------------------------------------------- */

    hDataset = GDALOpenShared(pszSource, GA_ReadOnly);

    if (hDataset == NULL)
    {
        fprintf(stderr,
                "GDALOpen failed - %d\n%s\n",
                CPLGetLastErrorNo(), CPLGetLastErrorMsg());
        GDALDestroyDriverManager();
        exit(1);
    }

/* -------------------------------------------------------------------- */
/*      Handle subdatasets.                                             */
/* -------------------------------------------------------------------- */
    if (!bCopySubDatasets
        && CSLCount(GDALGetMetadata(hDataset, "SUBDATASETS")) > 0
        && GDALGetRasterCount(hDataset) == 0)
    {
        fprintf(stderr,
                "Input file contains subdatasets. Please, select one of them for reading.\n");
        GDALClose(hDataset);
        GDALDestroyDriverManager();
        exit(1);
    }

    if (CSLCount(GDALGetMetadata(hDataset, "SUBDATASETS")) > 0
        && bCopySubDatasets)
    {
        char **papszSubdatasets = GDALGetMetadata(hDataset, "SUBDATASETS");
        char *pszSubDest        = (char*) CPLMalloc(strlen(pszDest) + 32);
        int  i;
        int  bOldSubCall    = bSubCall;
        char **papszDupArgv = CSLDuplicate(argv);
        int  nRet           = 0;

        CPLFree(papszDupArgv[iDstFileArg]);
        papszDupArgv[iDstFileArg] = pszSubDest;
        bSubCall                  = TRUE;

        for (i = 0; papszSubdatasets[i] != NULL; i += 2)
        {
            CPLFree(papszDupArgv[iSrcFileArg]);
            papszDupArgv[iSrcFileArg] = CPLStrdup(strstr(papszSubdatasets[i], "=") + 1);
            sprintf(pszSubDest, "%s%d", pszDest, i / 2 + 1);
            nRet = ProxyMain(argc, papszDupArgv);
            if (nRet != 0)
                break;
        }

        CSLDestroy(papszDupArgv);

        bSubCall = bOldSubCall;
        CSLDestroy(argv);

        GDALClose(hDataset);

        if (!bSubCall)
        {
            GDALDumpOpenDatasets(stderr);
            GDALDestroyDriverManager();
        }

        return nRet;
    }

/* -------------------------------------------------------------------- */
/*      Collect some information from the source file.                  */
/* -------------------------------------------------------------------- */
    nRasterXSize = GDALGetRasterXSize(hDataset);
    nRasterYSize = GDALGetRasterYSize(hDataset);

    if (!bQuiet)
        printf("Input file size is %d, %d\n", nRasterXSize, nRasterYSize);

    if (anSrcWin[2] == 0 && anSrcWin[3] == 0)
    {
        anSrcWin[2] = nRasterXSize;
        anSrcWin[3] = nRasterYSize;
    }

/* -------------------------------------------------------------------- */
/*      Build band list to translate                                    */
/* -------------------------------------------------------------------- */
    if (nBandCount == 0)
    {
        nBandCount = GDALGetRasterCount(hDataset);
        if (nBandCount == 0)
        {
            fprintf(stderr, "Input file has no bands, and so cannot be translated.\n");
            GDALDestroyDriverManager();
            exit(1);
        }

        panBandList = (int*) CPLMalloc(sizeof(int) * nBandCount);

        for (i = 0; i < nBandCount; i++)
            panBandList[i] = i + 1;
    }
    else
    {
        for (i = 0; i < nBandCount; i++)
        {
            if (ABS(panBandList[i]) > GDALGetRasterCount(hDataset))
            {
                fprintf(stderr,
                        "Band %d requested, but only bands 1 to %d available.\n",
                        ABS(panBandList[i]), GDALGetRasterCount(hDataset));
                GDALDestroyDriverManager();
                exit(2);
            }
        }

        if (nBandCount != GDALGetRasterCount(hDataset))
            bDefBands = FALSE;
    }

/* -------------------------------------------------------------------- */
/*      Compute the source window from the projected source window      */
/*      if the projected coordinates were provided.  Note that the      */
/*      projected coordinates are in ulx, uly, lrx, lry format,         */
/*      while the anSrcWin is xoff, yoff, xsize, ysize with the         */
/*      xoff,yoff being the ulx, uly in pixel/line.                     */
/* -------------------------------------------------------------------- */
    if (dfULX != 0.0 || dfULY != 0.0
        || dfLRX != 0.0 || dfLRY != 0.0)
    {
        double adfGeoTransform[6];

        GDALGetGeoTransform(hDataset, adfGeoTransform);

        if (adfGeoTransform[2] != 0.0 || adfGeoTransform[4] != 0.0)
        {
            fprintf(stderr,
                    "The -projwin option was used, but the geotransform is\n"
                    "rotated.  This configuration is not supported.\n");
            GDALClose(hDataset);
            CPLFree(panBandList);
            GDALDestroyDriverManager();
            exit(1);
        }

        anSrcWin[0] = (int)
                      ((dfULX - adfGeoTransform[0]) / adfGeoTransform[1] + 0.001);
        anSrcWin[1] = (int)
                      ((dfULY - adfGeoTransform[3]) / adfGeoTransform[5] + 0.001);

        anSrcWin[2] = (int) ((dfLRX - dfULX) / adfGeoTransform[1] + 0.5);
        anSrcWin[3] = (int) ((dfLRY - dfULY) / adfGeoTransform[5] + 0.5);

        if (!bQuiet)
            fprintf(stdout,
                    "Computed -srcwin %d %d %d %d from projected window.\n",
                    anSrcWin[0],
                    anSrcWin[1],
                    anSrcWin[2],
                    anSrcWin[3]);

        if (anSrcWin[0] < 0 || anSrcWin[1] < 0
            || anSrcWin[0] + anSrcWin[2] > GDALGetRasterXSize(hDataset)
            || anSrcWin[1] + anSrcWin[3] > GDALGetRasterYSize(hDataset))
        {
            fprintf(stderr,
                    "Computed -srcwin falls outside raster size of %dx%d.\n",
                    GDALGetRasterXSize(hDataset),
                    GDALGetRasterYSize(hDataset));
            exit(1);
        }
    }

/* -------------------------------------------------------------------- */
/*      Verify source window.                                           */
/* -------------------------------------------------------------------- */
    if (anSrcWin[0] < 0 || anSrcWin[1] < 0
        || anSrcWin[2] <= 0 || anSrcWin[3] <= 0
        || anSrcWin[0] + anSrcWin[2] > GDALGetRasterXSize(hDataset)
        || anSrcWin[1] + anSrcWin[3] > GDALGetRasterYSize(hDataset))
    {
        fprintf(stderr,
                "-srcwin %d %d %d %d falls outside raster size of %dx%d\n"
                "or is otherwise illegal.\n",
                anSrcWin[0],
                anSrcWin[1],
                anSrcWin[2],
                anSrcWin[3],
                GDALGetRasterXSize(hDataset),
                GDALGetRasterYSize(hDataset));
        exit(1);
    }

/* -------------------------------------------------------------------- */
/*      Find the output driver.                                         */
/* -------------------------------------------------------------------- */
    hDriver = GDALGetDriverByName(pszFormat);
    if (hDriver == NULL)
    {
        int iDr;

        printf("Output driver `%s' not recognised.\n", pszFormat);
        printf("The following format drivers are configured and support output:\n");

        for (iDr = 0; iDr < GDALGetDriverCount(); iDr++)
        {
            GDALDriverH hDriver = GDALGetDriver(iDr);

            if (GDALGetMetadataItem(hDriver, GDAL_DCAP_CREATE, NULL) != NULL
                || GDALGetMetadataItem(hDriver, GDAL_DCAP_CREATECOPY,
                                       NULL) != NULL)
            {
                printf("  %s: %s\n",
                       GDALGetDriverShortName(hDriver),
                       GDALGetDriverLongName(hDriver));
            }
        }

        printf("\n");
        Usage();

        GDALClose(hDataset);
        CPLFree(panBandList);
        GDALDestroyDriverManager();
        CSLDestroy(argv);
        CSLDestroy(papszCreateOptions);
        exit(1);
    }

/* -------------------------------------------------------------------- */
/*      The short form is to CreateCopy().  We use this if the input    */
/*      matches the whole dataset.  Eventually we should rewrite        */
/*      this entire program to use virtual datasets to construct a      */
/*      virtual input source to copy from.                              */
/* -------------------------------------------------------------------- */


    int bSpatialArrangementPreserved = (
        anSrcWin[0] == 0 && anSrcWin[1] == 0
        && anSrcWin[2] == GDALGetRasterXSize(hDataset)
        && anSrcWin[3] == GDALGetRasterYSize(hDataset)
        && pszOXSize == NULL && pszOYSize == NULL);

    if (eOutputType == GDT_Unknown
        && !bScale && !bUnscale
        && CSLCount(papszMetadataOptions) == 0 && bDefBands
        && eMaskMode == MASK_AUTO
        && bSpatialArrangementPreserved
        && nGCPCount == 0 && !bGotBounds
        && pszOutputSRS == NULL && !bSetNoData && !bUnsetNoData
        && nRGBExpand == 0 && !bStats)
    {
        hOutDS = GDALCreateCopy(hDriver, pszDest, hDataset,
                                bStrict, papszCreateOptions,
                                pfnProgress, NULL);

        if (hOutDS != NULL)
            GDALClose(hOutDS);

        GDALClose(hDataset);

        CPLFree(panBandList);

        if (!bSubCall)
        {
            GDALDumpOpenDatasets(stderr);
            GDALDestroyDriverManager();
        }

        CSLDestroy(argv);
        CSLDestroy(papszCreateOptions);

        return hOutDS == NULL;
    }

/* -------------------------------------------------------------------- */
/*      Establish some parameters.                                      */
/* -------------------------------------------------------------------- */
    if (pszOXSize == NULL)
    {
        nOXSize = anSrcWin[2];
        nOYSize = anSrcWin[3];
    }
    else
    {
        nOXSize = (int) ((pszOXSize[strlen(pszOXSize) - 1] == '%'
                          ? CPLAtofM(pszOXSize) / 100 * anSrcWin[2] : atoi(pszOXSize)));
        nOYSize = (int) ((pszOYSize[strlen(pszOYSize) - 1] == '%'
                          ? CPLAtofM(pszOYSize) / 100 * anSrcWin[3] : atoi(pszOYSize)));
    }

/* ==================================================================== */
/*      Create a virtual dataset.                                       */
/* ==================================================================== */
    VRTDataset *poVDS;

/* -------------------------------------------------------------------- */
/*      Make a virtual clone.                                           */
/* -------------------------------------------------------------------- */
    poVDS = (VRTDataset*) VRTCreate(nOXSize, nOYSize);

    if (nGCPCount == 0)
    {
        if (pszOutputSRS != NULL)
        {
            poVDS->SetProjection(pszOutputSRS);
        }
        else
        {
            pszProjection = GDALGetProjectionRef(hDataset);
            if (pszProjection != NULL && strlen(pszProjection) > 0)
                poVDS->SetProjection(pszProjection);
        }
    }

    if (bGotBounds)
    {
        adfGeoTransform[0] = adfULLR[0];
        adfGeoTransform[1] = (adfULLR[2] - adfULLR[0]) / nOXSize;
        adfGeoTransform[2] = 0.0;
        adfGeoTransform[3] = adfULLR[1];
        adfGeoTransform[4] = 0.0;
        adfGeoTransform[5] = (adfULLR[3] - adfULLR[1]) / nOYSize;

        poVDS->SetGeoTransform(adfGeoTransform);
    }

    else if (GDALGetGeoTransform(hDataset, adfGeoTransform) == CE_None
             && nGCPCount == 0)
    {
        adfGeoTransform[0] += anSrcWin[0] * adfGeoTransform[1]
                              + anSrcWin[1] * adfGeoTransform[2];
        adfGeoTransform[3] += anSrcWin[0] * adfGeoTransform[4]
                              + anSrcWin[1] * adfGeoTransform[5];

        adfGeoTransform[1] *= anSrcWin[2] / (double) nOXSize;
        adfGeoTransform[2] *= anSrcWin[3] / (double) nOYSize;
        adfGeoTransform[4] *= anSrcWin[2] / (double) nOXSize;
        adfGeoTransform[5] *= anSrcWin[3] / (double) nOYSize;

        poVDS->SetGeoTransform(adfGeoTransform);
    }

    if (nGCPCount != 0)
    {
        const char *pszGCPProjection = pszOutputSRS;

        if (pszGCPProjection == NULL)
            pszGCPProjection = GDALGetGCPProjection(hDataset);

        if (pszGCPProjection == NULL)
            pszGCPProjection = "";

        poVDS->SetGCPs(nGCPCount, pasGCPs, pszGCPProjection);

        GDALDeinitGCPs(nGCPCount, pasGCPs);
        CPLFree(pasGCPs);
    }

    else if (GDALGetGCPCount(hDataset) > 0)
    {
        GDAL_GCP *pasGCPs;
        int      nGCPs = GDALGetGCPCount(hDataset);

        pasGCPs = GDALDuplicateGCPs(nGCPs, GDALGetGCPs(hDataset));

        for (i = 0; i < nGCPs; i++)
        {
            pasGCPs[i].dfGCPPixel -= anSrcWin[0];
            pasGCPs[i].dfGCPLine  -= anSrcWin[1];
            pasGCPs[i].dfGCPPixel *= (nOXSize / (double) anSrcWin[2]);
            pasGCPs[i].dfGCPLine  *= (nOYSize / (double) anSrcWin[3]);
        }

        poVDS->SetGCPs(nGCPs, pasGCPs,
                       GDALGetGCPProjection(hDataset));

        GDALDeinitGCPs(nGCPs, pasGCPs);
        CPLFree(pasGCPs);
    }

/* -------------------------------------------------------------------- */
/*      Transfer generally applicable metadata.                         */
/* -------------------------------------------------------------------- */
    poVDS->SetMetadata(((GDALDataset*)hDataset)->GetMetadata());
    AttachMetadata((GDALDatasetH) poVDS, papszMetadataOptions);

    const char *pszInterleave = GDALGetMetadataItem(hDataset, "INTERLEAVE", "IMAGE_STRUCTURE");
    if (pszInterleave)
        poVDS->SetMetadataItem("INTERLEAVE", pszInterleave, "IMAGE_STRUCTURE");

/* -------------------------------------------------------------------- */
/*      Transfer metadata that remains valid if the spatial             */
/*      arrangement of the data is unaltered.                           */
/* -------------------------------------------------------------------- */
    if (bSpatialArrangementPreserved)
    {
        char **papszMD;

        papszMD = ((GDALDataset*)hDataset)->GetMetadata("RPC");
        if (papszMD != NULL)
            poVDS->SetMetadata(papszMD, "RPC");

        papszMD = ((GDALDataset*)hDataset)->GetMetadata("GEOLOCATION");
        if (papszMD != NULL)
            poVDS->SetMetadata(papszMD, "GEOLOCATION");
    }

    int nSrcBandCount = nBandCount;

    if (nRGBExpand != 0)
    {
        GDALRasterBand *poSrcBand;
        poSrcBand = ((GDALDataset*)
                     hDataset)->GetRasterBand(ABS(panBandList[0]));
        if (panBandList[0] < 0)
            poSrcBand = poSrcBand->GetMaskBand();

        GDALColorTable *poColorTable = poSrcBand->GetColorTable();
        if (poColorTable == NULL)
        {
            fprintf(stderr, "Error : band %d has no color table\n", ABS(panBandList[0]));
            GDALClose(hDataset);
            CPLFree(panBandList);
            GDALDestroyDriverManager();
            CSLDestroy(argv);
            CSLDestroy(papszCreateOptions);
            exit(1);
        }

        /* Check that the color table only contains gray levels */
        /* when using -expand gray */
        if (nRGBExpand == 1)
        {
            int nColorCount = poColorTable->GetColorEntryCount();
            int nColor;

            for (nColor = 0; nColor < nColorCount; nColor++)
            {
                const GDALColorEntry *poEntry = poColorTable->GetColorEntry(nColor);
                if (poEntry->c1 != poEntry->c2 || poEntry->c1 != poEntry->c2)
                {
                    fprintf(stderr, "Warning : color table contains non gray levels colors\n");
                    break;
                }
            }
        }

        if (nBandCount == 1)
            nBandCount = nRGBExpand;
        else if (nBandCount == 2 && (nRGBExpand == 3 || nRGBExpand == 4))
            nBandCount = nRGBExpand;
        else
        {
            fprintf(stderr, "Error : invalid use of -expand option.\n");
            exit(1);
        }
    }

    int bFilterOutStatsMetadata =
        (bScale || bUnscale || !bSpatialArrangementPreserved || nRGBExpand != 0);

/* ==================================================================== */
/*      Process all bands.                                              */
/* ==================================================================== */
    for (i = 0; i < nBandCount; i++)
    {
        VRTSourcedRasterBand *poVRTBand;
        GDALRasterBand       *poSrcBand;
        GDALDataType         eBandType;
        int                  nComponent = 0;

        int nSrcBand;
        if (nRGBExpand != 0)
        {
            if (nSrcBandCount == 2 && nRGBExpand == 4 && i == 3)
                nSrcBand = panBandList[1];
            else
            {
                nSrcBand   = panBandList[0];
                nComponent = i + 1;
            }
        }
        else
            nSrcBand = panBandList[i];

        poSrcBand = ((GDALDataset*) hDataset)->GetRasterBand(ABS(nSrcBand));

/* -------------------------------------------------------------------- */
/*      Select output data type to match source.                        */
/* -------------------------------------------------------------------- */
        if (eOutputType == GDT_Unknown)
            eBandType = poSrcBand->GetRasterDataType();
        else
            eBandType = eOutputType;

/* -------------------------------------------------------------------- */
/*      Create this band.                                               */
/* -------------------------------------------------------------------- */
        poVDS->AddBand(eBandType, NULL);
        poVRTBand = (VRTSourcedRasterBand*) poVDS->GetRasterBand(i + 1);
        if (nSrcBand < 0)
        {
            poVRTBand->AddMaskBandSource(poSrcBand);
            continue;
        }

/* -------------------------------------------------------------------- */
/*      Do we need to collect scaling information?                      */
/* -------------------------------------------------------------------- */
        double dfScale = 1.0, dfOffset = 0.0;

        if (bScale && !bHaveScaleSrc)
        {
            double adfCMinMax[2];
            GDALComputeRasterMinMax(poSrcBand, TRUE, adfCMinMax);
            dfScaleSrcMin = adfCMinMax[0];
            dfScaleSrcMax = adfCMinMax[1];
        }

        if (bScale)
        {
            if (dfScaleSrcMax == dfScaleSrcMin)
                dfScaleSrcMax += 0.1;

            if (dfScaleDstMax == dfScaleDstMin)
                dfScaleDstMax += 0.1;

            dfScale = (dfScaleDstMax - dfScaleDstMin)
                      / (dfScaleSrcMax - dfScaleSrcMin);
            dfOffset = -1 * dfScaleSrcMin * dfScale + dfScaleDstMin;
        }

        if (bUnscale)
        {
            dfScale  = poSrcBand->GetScale();
            dfOffset = poSrcBand->GetOffset();
        }

/* -------------------------------------------------------------------- */
/*      Create a simple or complex data source depending on the         */
/*      translation type required.                                      */
/* -------------------------------------------------------------------- */
        if (bUnscale || bScale || (nRGBExpand != 0 && i < nRGBExpand))
        {
            poVRTBand->AddComplexSource(poSrcBand,
                                        anSrcWin[0], anSrcWin[1],
                                        anSrcWin[2], anSrcWin[3],
                                        0, 0, nOXSize, nOYSize,
                                        dfOffset, dfScale,
                                        VRT_NODATA_UNSET,
                                        nComponent);
        }
        else
            poVRTBand->AddSimpleSource(poSrcBand,
                                       anSrcWin[0], anSrcWin[1],
                                       anSrcWin[2], anSrcWin[3],
                                       0, 0, nOXSize, nOYSize);

/* -------------------------------------------------------------------- */
/*      In case of color table translate, we only set the color         */
/*      interpretation other info copied by CopyBandInfo are            */
/*      not relevant in RGB expansion.                                  */
/* -------------------------------------------------------------------- */
        if (nRGBExpand == 1)
        {
            poVRTBand->SetColorInterpretation(GCI_GrayIndex);
        }
        else if (nRGBExpand != 0 && i < nRGBExpand)
        {
            poVRTBand->SetColorInterpretation((GDALColorInterp) (GCI_RedBand + i));
        }

/* -------------------------------------------------------------------- */
/*      copy over some other information of interest.                   */
/* -------------------------------------------------------------------- */
        else
        {
            CopyBandInfo(poSrcBand, poVRTBand,
                         !bStats && !bFilterOutStatsMetadata,
                         !bUnscale,
                         !bSetNoData && !bUnsetNoData);
        }

/* -------------------------------------------------------------------- */
/*      Set a forcable nodata value?                                    */
/* -------------------------------------------------------------------- */
        if (bSetNoData)
        {
            double dfVal    = dfNoDataReal;
            int    bClamped = FALSE, bRounded = FALSE;

#define CLAMP(val, type, minval, maxval)                                          \
    do { if (val < minval) { bClamped = TRUE; val = minval;                       \
         }                                                                        \
         else if (val > maxval) { bClamped = TRUE; val = maxval; }                \
         else if (val != (type)val) { bRounded = TRUE; val = (type)(val + 0.5); } \
    }                                                                             \
    while (0)

            switch (eBandType)
            {
            case GDT_Byte:
                CLAMP(dfVal, GByte, 0.0, 255.0);
                break;

            case GDT_Int16:
                CLAMP(dfVal, GInt16, -32768.0, 32767.0);
                break;

            case GDT_UInt16:
                CLAMP(dfVal, GUInt16, 0.0, 65535.0);
                break;

            case GDT_Int32:
                CLAMP(dfVal, GInt32, -2147483648.0, 2147483647.0);
                break;

            case GDT_UInt32:
                CLAMP(dfVal, GUInt32, 0.0, 4294967295.0);
                break;

            default:
                break;
            }

            if (bClamped)
            {
                printf("for band %d, nodata value has been clamped "
                       "to %.0f, the original value being out of range.\n",
                       i + 1, dfVal);
            }
            else if (bRounded)
            {
                printf("for band %d, nodata value has been rounded "
                       "to %.0f, %s being an integer datatype.\n",
                       i + 1, dfVal,
                       GDALGetDataTypeName(eBandType));
            }

            poVRTBand->SetNoDataValue(dfVal);
        }

        if (eMaskMode == MASK_AUTO &&
            (GDALGetMaskFlags(GDALGetRasterBand(hDataset, 1)) & GMF_PER_DATASET) == 0 &&
            (poSrcBand->GetMaskFlags() & (GMF_ALL_VALID | GMF_NODATA)) == 0)
        {
            if (poVRTBand->CreateMaskBand(poSrcBand->GetMaskFlags()) == CE_None)
            {
                VRTSourcedRasterBand *hMaskVRTBand =
                    (VRTSourcedRasterBand*)poVRTBand->GetMaskBand();
                hMaskVRTBand->AddMaskBandSource(poSrcBand,
                                                anSrcWin[0], anSrcWin[1],
                                                anSrcWin[2], anSrcWin[3],
                                                0, 0, nOXSize, nOYSize);
            }
        }
    }

    if (eMaskMode == MASK_USER)
    {
        GDALRasterBand *poSrcBand =
            (GDALRasterBand*)GDALGetRasterBand(hDataset, ABS(nMaskBand));
        if (poSrcBand && poVDS->CreateMaskBand(GMF_PER_DATASET) == CE_None)
        {
            VRTSourcedRasterBand *hMaskVRTBand = (VRTSourcedRasterBand*)
                                                 GDALGetMaskBand(GDALGetRasterBand((GDALDatasetH)poVDS, 1));
            if (nMaskBand > 0)
                hMaskVRTBand->AddSimpleSource(poSrcBand,
                                              anSrcWin[0], anSrcWin[1],
                                              anSrcWin[2], anSrcWin[3],
                                              0, 0, nOXSize, nOYSize);
            else
                hMaskVRTBand->AddMaskBandSource(poSrcBand,
                                                anSrcWin[0], anSrcWin[1],
                                                anSrcWin[2], anSrcWin[3],
                                                0, 0, nOXSize, nOYSize);
        }
    }
    else if (eMaskMode == MASK_AUTO && nSrcBandCount > 0 &&
             GDALGetMaskFlags(GDALGetRasterBand(hDataset, 1)) == GMF_PER_DATASET)
    {
        if (poVDS->CreateMaskBand(GMF_PER_DATASET) == CE_None)
        {
            VRTSourcedRasterBand *hMaskVRTBand = (VRTSourcedRasterBand*)
                                                 GDALGetMaskBand(GDALGetRasterBand((GDALDatasetH)poVDS, 1));
            hMaskVRTBand->AddMaskBandSource((GDALRasterBand*)GDALGetRasterBand(hDataset, 1),
                                            anSrcWin[0], anSrcWin[1],
                                            anSrcWin[2], anSrcWin[3],
                                            0, 0, nOXSize, nOYSize);
        }
    }

/* -------------------------------------------------------------------- */
/*      Compute stats if required.                                      */
/* -------------------------------------------------------------------- */
    if (bStats)
    {
        for (i = 0; i < poVDS->GetRasterCount(); i++)
        {
            double dfMin, dfMax, dfMean, dfStdDev;
            poVDS->GetRasterBand(i + 1)->ComputeStatistics(bApproxStats,
                                                           &dfMin, &dfMax, &dfMean, &dfStdDev, GDALDummyProgress, NULL);
        }
    }

/* -------------------------------------------------------------------- */
/*      Write to the output file using CopyCreate().                    */
/* -------------------------------------------------------------------- */
    hOutDS = GDALCreateCopy(hDriver, pszDest, (GDALDatasetH) poVDS,
                            bStrict, papszCreateOptions,
                            pfnProgress, NULL);
    if (hOutDS != NULL)
    {
        int bHasGotErr = FALSE;
        CPLErrorReset();
        GDALFlushCache(hOutDS);
        if (CPLGetLastErrorType() != CE_None)
            bHasGotErr = TRUE;

        GDALClose(hOutDS);
        if (bHasGotErr)
            hOutDS = NULL;
    }

    GDALClose((GDALDatasetH) poVDS);

    GDALClose(hDataset);

    CPLFree(panBandList);

    CPLFree(pszOutputSRS);

    if (!bSubCall)
    {
        GDALDumpOpenDatasets(stderr);
        GDALDestroyDriverManager();
    }

    CSLDestroy(argv);
    CSLDestroy(papszCreateOptions);

    return hOutDS == NULL;
}