/* $Id: tif_getimage.c,v 1.63.2.4 2010-06-08 18:50:42 bfriesen Exp $ */ /* * Copyright (c) 1991-1997 Sam Leffler * Copyright (c) 1991-1997 Silicon Graphics, Inc. * * Permission to use, copy, modify, distribute, and sell this software and * its documentation for any purpose is hereby granted without fee, provided * that (i) the above copyright notices and this permission notice appear in * all copies of the software and related documentation, and (ii) the names of * Sam Leffler and Silicon Graphics may not be used in any advertising or * publicity relating to the software without the specific, prior written * permission of Sam Leffler and Silicon Graphics. * * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. * * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ /* * TIFF Library * * Read and return a packed RGBA image. */ #include "tiffiop.h" #include static int gtTileContig(TIFFRGBAImage*, uint32*, uint32, uint32); static int gtTileSeparate(TIFFRGBAImage*, uint32*, uint32, uint32); static int gtStripContig(TIFFRGBAImage*, uint32*, uint32, uint32); static int gtStripSeparate(TIFFRGBAImage*, uint32*, uint32, uint32); static int PickContigCase(TIFFRGBAImage*); static int PickSeparateCase(TIFFRGBAImage*); static const char photoTag[] = "PhotometricInterpretation"; /* * Helper constants used in Orientation tag handling */ #define FLIP_VERTICALLY 0x01 #define FLIP_HORIZONTALLY 0x02 /* * Color conversion constants. We will define display types here. */ TIFFDisplay display_sRGB = { { /* XYZ -> luminance matrix */ { 3.2410F, -1.5374F, -0.4986F }, { -0.9692F, 1.8760F, 0.0416F }, { 0.0556F, -0.2040F, 1.0570F } }, 100.0F, 100.0F, 100.0F, /* Light o/p for reference white */ 255, 255, 255, /* Pixel values for ref. white */ 1.0F, 1.0F, 1.0F, /* Residual light o/p for black pixel */ 2.4F, 2.4F, 2.4F, /* Gamma values for the three guns */ }; /* * Check the image to see if TIFFReadRGBAImage can deal with it. * 1/0 is returned according to whether or not the image can * be handled. If 0 is returned, emsg contains the reason * why it is being rejected. */ int TIFFRGBAImageOK(TIFF* tif, char emsg[1024]) { TIFFDirectory* td = &tif->tif_dir; uint16 photometric; int colorchannels; if (!tif->tif_decodestatus) { sprintf(emsg, "Sorry, requested compression method is not configured"); return (0); } switch (td->td_bitspersample) { case 1: case 2: case 4: case 8: case 16: break; default: sprintf(emsg, "Sorry, can not handle images with %d-bit samples", td->td_bitspersample); return (0); } colorchannels = td->td_samplesperpixel - td->td_extrasamples; if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) { switch (colorchannels) { case 1: photometric = PHOTOMETRIC_MINISBLACK; break; case 3: photometric = PHOTOMETRIC_RGB; break; default: sprintf(emsg, "Missing needed %s tag", photoTag); return (0); } } switch (photometric) { case PHOTOMETRIC_MINISWHITE: case PHOTOMETRIC_MINISBLACK: case PHOTOMETRIC_PALETTE: if (td->td_planarconfig == PLANARCONFIG_CONTIG && td->td_samplesperpixel != 1 && td->td_bitspersample < 8 ) { sprintf(emsg, "Sorry, can not handle contiguous data with %s=%d, " "and %s=%d and Bits/Sample=%d", photoTag, photometric, "Samples/pixel", td->td_samplesperpixel, td->td_bitspersample); return (0); } /* * We should likely validate that any extra samples are either * to be ignored, or are alpha, and if alpha we should try to use * them. But for now we won't bother with this. */ break; case PHOTOMETRIC_YCBCR: /* * TODO: if at all meaningful and useful, make more complete * support check here, or better still, refactor to let supporting * code decide whether there is support and what meaningfull * error to return */ break; case PHOTOMETRIC_RGB: if (colorchannels < 3) { sprintf(emsg, "Sorry, can not handle RGB image with %s=%d", "Color channels", colorchannels); return (0); } break; case PHOTOMETRIC_SEPARATED: { uint16 inkset; TIFFGetFieldDefaulted(tif, TIFFTAG_INKSET, &inkset); if (inkset != INKSET_CMYK) { sprintf(emsg, "Sorry, can not handle separated image with %s=%d", "InkSet", inkset); return 0; } if (td->td_samplesperpixel < 4) { sprintf(emsg, "Sorry, can not handle separated image with %s=%d", "Samples/pixel", td->td_samplesperpixel); return 0; } break; } case PHOTOMETRIC_LOGL: if (td->td_compression != COMPRESSION_SGILOG) { sprintf(emsg, "Sorry, LogL data must have %s=%d", "Compression", COMPRESSION_SGILOG); return (0); } break; case PHOTOMETRIC_LOGLUV: if (td->td_compression != COMPRESSION_SGILOG && td->td_compression != COMPRESSION_SGILOG24) { sprintf(emsg, "Sorry, LogLuv data must have %s=%d or %d", "Compression", COMPRESSION_SGILOG, COMPRESSION_SGILOG24); return (0); } if (td->td_planarconfig != PLANARCONFIG_CONTIG) { sprintf(emsg, "Sorry, can not handle LogLuv images with %s=%d", "Planarconfiguration", td->td_planarconfig); return (0); } break; case PHOTOMETRIC_CIELAB: break; default: sprintf(emsg, "Sorry, can not handle image with %s=%d", photoTag, photometric); return (0); } return (1); } void TIFFRGBAImageEnd(TIFFRGBAImage* img) { if (img->Map) _TIFFfree(img->Map), img->Map = NULL; if (img->BWmap) _TIFFfree(img->BWmap), img->BWmap = NULL; if (img->PALmap) _TIFFfree(img->PALmap), img->PALmap = NULL; if (img->ycbcr) _TIFFfree(img->ycbcr), img->ycbcr = NULL; if (img->cielab) _TIFFfree(img->cielab), img->cielab = NULL; if( img->redcmap ) { _TIFFfree( img->redcmap ); _TIFFfree( img->greencmap ); _TIFFfree( img->bluecmap ); } } static int isCCITTCompression(TIFF* tif) { uint16 compress; TIFFGetField(tif, TIFFTAG_COMPRESSION, &compress); return (compress == COMPRESSION_CCITTFAX3 || compress == COMPRESSION_CCITTFAX4 || compress == COMPRESSION_CCITTRLE || compress == COMPRESSION_CCITTRLEW); } int TIFFRGBAImageBegin(TIFFRGBAImage* img, TIFF* tif, int stop, char emsg[1024]) { uint16* sampleinfo; uint16 extrasamples; uint16 planarconfig; uint16 compress; int colorchannels; uint16 *red_orig, *green_orig, *blue_orig; int n_color; /* Initialize to normal values */ img->row_offset = 0; img->col_offset = 0; img->redcmap = NULL; img->greencmap = NULL; img->bluecmap = NULL; img->req_orientation = ORIENTATION_BOTLEFT; /* It is the default */ img->tif = tif; img->stoponerr = stop; TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &img->bitspersample); switch (img->bitspersample) { case 1: case 2: case 4: case 8: case 16: break; default: sprintf(emsg, "Sorry, can not handle images with %d-bit samples", img->bitspersample); return (0); } img->alpha = 0; TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &img->samplesperpixel); TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES, &extrasamples, &sampleinfo); if (extrasamples >= 1) { switch (sampleinfo[0]) { case EXTRASAMPLE_UNSPECIFIED: /* Workaround for some images without */ if (img->samplesperpixel > 3) /* correct info about alpha channel */ img->alpha = EXTRASAMPLE_ASSOCALPHA; break; case EXTRASAMPLE_ASSOCALPHA: /* data is pre-multiplied */ case EXTRASAMPLE_UNASSALPHA: /* data is not pre-multiplied */ img->alpha = sampleinfo[0]; break; } } #ifdef DEFAULT_EXTRASAMPLE_AS_ALPHA if( !TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &img->photometric)) img->photometric = PHOTOMETRIC_MINISWHITE; if( extrasamples == 0 && img->samplesperpixel == 4 && img->photometric == PHOTOMETRIC_RGB ) { img->alpha = EXTRASAMPLE_ASSOCALPHA; extrasamples = 1; } #endif colorchannels = img->samplesperpixel - extrasamples; TIFFGetFieldDefaulted(tif, TIFFTAG_COMPRESSION, &compress); TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG, &planarconfig); if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &img->photometric)) { switch (colorchannels) { case 1: if (isCCITTCompression(tif)) img->photometric = PHOTOMETRIC_MINISWHITE; else img->photometric = PHOTOMETRIC_MINISBLACK; break; case 3: img->photometric = PHOTOMETRIC_RGB; break; default: sprintf(emsg, "Missing needed %s tag", photoTag); return (0); } } switch (img->photometric) { case PHOTOMETRIC_PALETTE: if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &red_orig, &green_orig, &blue_orig)) { sprintf(emsg, "Missing required \"Colormap\" tag"); return (0); } /* copy the colormaps so we can modify them */ n_color = (1L << img->bitspersample); img->redcmap = (uint16 *) _TIFFmalloc(sizeof(uint16)*n_color); img->greencmap = (uint16 *) _TIFFmalloc(sizeof(uint16)*n_color); img->bluecmap = (uint16 *) _TIFFmalloc(sizeof(uint16)*n_color); if( !img->redcmap || !img->greencmap || !img->bluecmap ) { sprintf(emsg, "Out of memory for colormap copy"); return (0); } _TIFFmemcpy( img->redcmap, red_orig, n_color * 2 ); _TIFFmemcpy( img->greencmap, green_orig, n_color * 2 ); _TIFFmemcpy( img->bluecmap, blue_orig, n_color * 2 ); /* fall thru... */ case PHOTOMETRIC_MINISWHITE: case PHOTOMETRIC_MINISBLACK: if (planarconfig == PLANARCONFIG_CONTIG && img->samplesperpixel != 1 && img->bitspersample < 8 ) { sprintf(emsg, "Sorry, can not handle contiguous data with %s=%d, " "and %s=%d and Bits/Sample=%d", photoTag, img->photometric, "Samples/pixel", img->samplesperpixel, img->bitspersample); return (0); } break; case PHOTOMETRIC_YCBCR: /* It would probably be nice to have a reality check here. */ if (planarconfig == PLANARCONFIG_CONTIG) /* can rely on libjpeg to convert to RGB */ /* XXX should restore current state on exit */ switch (compress) { case COMPRESSION_JPEG: /* * TODO: when complete tests verify complete desubsampling * and YCbCr handling, remove use of TIFFTAG_JPEGCOLORMODE in * favor of tif_getimage.c native handling */ TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB); img->photometric = PHOTOMETRIC_RGB; break; default: /* do nothing */; break; } /* * TODO: if at all meaningful and useful, make more complete * support check here, or better still, refactor to let supporting * code decide whether there is support and what meaningfull * error to return */ break; case PHOTOMETRIC_RGB: if (colorchannels < 3) { sprintf(emsg, "Sorry, can not handle RGB image with %s=%d", "Color channels", colorchannels); return (0); } break; case PHOTOMETRIC_SEPARATED: { uint16 inkset; TIFFGetFieldDefaulted(tif, TIFFTAG_INKSET, &inkset); if (inkset != INKSET_CMYK) { sprintf(emsg, "Sorry, can not handle separated image with %s=%d", "InkSet", inkset); return (0); } if (img->samplesperpixel < 4) { sprintf(emsg, "Sorry, can not handle separated image with %s=%d", "Samples/pixel", img->samplesperpixel); return (0); } } break; case PHOTOMETRIC_LOGL: if (compress != COMPRESSION_SGILOG) { sprintf(emsg, "Sorry, LogL data must have %s=%d", "Compression", COMPRESSION_SGILOG); return (0); } TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT); img->photometric = PHOTOMETRIC_MINISBLACK; /* little white lie */ img->bitspersample = 8; break; case PHOTOMETRIC_LOGLUV: if (compress != COMPRESSION_SGILOG && compress != COMPRESSION_SGILOG24) { sprintf(emsg, "Sorry, LogLuv data must have %s=%d or %d", "Compression", COMPRESSION_SGILOG, COMPRESSION_SGILOG24); return (0); } if (planarconfig != PLANARCONFIG_CONTIG) { sprintf(emsg, "Sorry, can not handle LogLuv images with %s=%d", "Planarconfiguration", planarconfig); return (0); } TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT); img->photometric = PHOTOMETRIC_RGB; /* little white lie */ img->bitspersample = 8; break; case PHOTOMETRIC_CIELAB: break; default: sprintf(emsg, "Sorry, can not handle image with %s=%d", photoTag, img->photometric); return (0); } img->Map = NULL; img->BWmap = NULL; img->PALmap = NULL; img->ycbcr = NULL; img->cielab = NULL; TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &img->width); TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &img->height); TIFFGetFieldDefaulted(tif, TIFFTAG_ORIENTATION, &img->orientation); img->isContig = !(planarconfig == PLANARCONFIG_SEPARATE && colorchannels > 1); if (img->isContig) { if (!PickContigCase(img)) { sprintf(emsg, "Sorry, can not handle image"); return 0; } } else { if (!PickSeparateCase(img)) { sprintf(emsg, "Sorry, can not handle image"); return 0; } } return 1; } int TIFFRGBAImageGet(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) { if (img->get == NULL) { TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No \"get\" routine setup"); return (0); } if (img->put.any == NULL) { TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No \"put\" routine setupl; probably can not handle image format"); return (0); } return (*img->get)(img, raster, w, h); } /* * Read the specified image into an ABGR-format rastertaking in account * specified orientation. */ int TIFFReadRGBAImageOriented(TIFF* tif, uint32 rwidth, uint32 rheight, uint32* raster, int orientation, int stop) { char emsg[1024] = ""; TIFFRGBAImage img; int ok; if (TIFFRGBAImageOK(tif, emsg) && TIFFRGBAImageBegin(&img, tif, stop, emsg)) { img.req_orientation = orientation; /* XXX verify rwidth and rheight against width and height */ ok = TIFFRGBAImageGet(&img, raster+(rheight-img.height)*rwidth, rwidth, img.height); TIFFRGBAImageEnd(&img); } else { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", emsg); ok = 0; } return (ok); } /* * Read the specified image into an ABGR-format raster. Use bottom left * origin for raster by default. */ int TIFFReadRGBAImage(TIFF* tif, uint32 rwidth, uint32 rheight, uint32* raster, int stop) { return TIFFReadRGBAImageOriented(tif, rwidth, rheight, raster, ORIENTATION_BOTLEFT, stop); } static int setorientation(TIFFRGBAImage* img) { switch (img->orientation) { case ORIENTATION_TOPLEFT: case ORIENTATION_LEFTTOP: if (img->req_orientation == ORIENTATION_TOPRIGHT || img->req_orientation == ORIENTATION_RIGHTTOP) return FLIP_HORIZONTALLY; else if (img->req_orientation == ORIENTATION_BOTRIGHT || img->req_orientation == ORIENTATION_RIGHTBOT) return FLIP_HORIZONTALLY | FLIP_VERTICALLY; else if (img->req_orientation == ORIENTATION_BOTLEFT || img->req_orientation == ORIENTATION_LEFTBOT) return FLIP_VERTICALLY; else return 0; case ORIENTATION_TOPRIGHT: case ORIENTATION_RIGHTTOP: if (img->req_orientation == ORIENTATION_TOPLEFT || img->req_orientation == ORIENTATION_LEFTTOP) return FLIP_HORIZONTALLY; else if (img->req_orientation == ORIENTATION_BOTRIGHT || img->req_orientation == ORIENTATION_RIGHTBOT) return FLIP_VERTICALLY; else if (img->req_orientation == ORIENTATION_BOTLEFT || img->req_orientation == ORIENTATION_LEFTBOT) return FLIP_HORIZONTALLY | FLIP_VERTICALLY; else return 0; case ORIENTATION_BOTRIGHT: case ORIENTATION_RIGHTBOT: if (img->req_orientation == ORIENTATION_TOPLEFT || img->req_orientation == ORIENTATION_LEFTTOP) return FLIP_HORIZONTALLY | FLIP_VERTICALLY; else if (img->req_orientation == ORIENTATION_TOPRIGHT || img->req_orientation == ORIENTATION_RIGHTTOP) return FLIP_VERTICALLY; else if (img->req_orientation == ORIENTATION_BOTLEFT || img->req_orientation == ORIENTATION_LEFTBOT) return FLIP_HORIZONTALLY; else return 0; case ORIENTATION_BOTLEFT: case ORIENTATION_LEFTBOT: if (img->req_orientation == ORIENTATION_TOPLEFT || img->req_orientation == ORIENTATION_LEFTTOP) return FLIP_VERTICALLY; else if (img->req_orientation == ORIENTATION_TOPRIGHT || img->req_orientation == ORIENTATION_RIGHTTOP) return FLIP_HORIZONTALLY | FLIP_VERTICALLY; else if (img->req_orientation == ORIENTATION_BOTRIGHT || img->req_orientation == ORIENTATION_RIGHTBOT) return FLIP_HORIZONTALLY; else return 0; default: /* NOTREACHED */ return 0; } } /* * Get an tile-organized image that has * PlanarConfiguration contiguous if SamplesPerPixel > 1 * or * SamplesPerPixel == 1 */ static int gtTileContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) { TIFF* tif = img->tif; tileContigRoutine put = img->put.contig; uint32 col, row, y, rowstoread; uint32 pos; uint32 tw, th; unsigned char* buf; int32 fromskew, toskew; uint32 nrow; int ret = 1, flip; buf = (unsigned char*) _TIFFmalloc(TIFFTileSize(tif)); if (buf == 0) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer"); return (0); } _TIFFmemset(buf, 0, TIFFTileSize(tif)); TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw); TIFFGetField(tif, TIFFTAG_TILELENGTH, &th); flip = setorientation(img); if (flip & FLIP_VERTICALLY) { y = h - 1; toskew = -(int32)(tw + w); } else { y = 0; toskew = -(int32)(tw - w); } for (row = 0; row < h; row += nrow) { rowstoread = th - (row + img->row_offset) % th; nrow = (row + rowstoread > h ? h - row : rowstoread); for (col = 0; col < w; col += tw) { if (TIFFReadTile(tif, buf, col+img->col_offset, row+img->row_offset, 0, 0) < 0 && img->stoponerr) { ret = 0; break; } pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif); if (col + tw > w) { /* * Tile is clipped horizontally. Calculate * visible portion and skewing factors. */ uint32 npix = w - col; fromskew = tw - npix; (*put)(img, raster+y*w+col, col, y, npix, nrow, fromskew, toskew + fromskew, buf + pos); } else { (*put)(img, raster+y*w+col, col, y, tw, nrow, 0, toskew, buf + pos); } } y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow); } _TIFFfree(buf); if (flip & FLIP_HORIZONTALLY) { uint32 line; for (line = 0; line < h; line++) { uint32 *left = raster + (line * w); uint32 *right = left + w - 1; while ( left < right ) { uint32 temp = *left; *left = *right; *right = temp; left++, right--; } } } return (ret); } /* * Get an tile-organized image that has * SamplesPerPixel > 1 * PlanarConfiguration separated * We assume that all such images are RGB. */ static int gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) { TIFF* tif = img->tif; tileSeparateRoutine put = img->put.separate; uint32 col, row, y, rowstoread; uint32 pos; uint32 tw, th; unsigned char* buf; unsigned char* p0; unsigned char* p1; unsigned char* p2; unsigned char* pa; tsize_t tilesize; int32 fromskew, toskew; int alpha = img->alpha; uint32 nrow; int ret = 1, flip; tilesize = TIFFTileSize(tif); buf = (unsigned char*) _TIFFmalloc((alpha?4:3)*tilesize); if (buf == 0) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer"); return (0); } _TIFFmemset(buf, 0, (alpha?4:3)*tilesize); p0 = buf; p1 = p0 + tilesize; p2 = p1 + tilesize; pa = (alpha?(p2+tilesize):NULL); TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw); TIFFGetField(tif, TIFFTAG_TILELENGTH, &th); flip = setorientation(img); if (flip & FLIP_VERTICALLY) { y = h - 1; toskew = -(int32)(tw + w); } else { y = 0; toskew = -(int32)(tw - w); } for (row = 0; row < h; row += nrow) { rowstoread = th - (row + img->row_offset) % th; nrow = (row + rowstoread > h ? h - row : rowstoread); for (col = 0; col < w; col += tw) { if (TIFFReadTile(tif, p0, col+img->col_offset, row+img->row_offset,0,0) < 0 && img->stoponerr) { ret = 0; break; } if (TIFFReadTile(tif, p1, col+img->col_offset, row+img->row_offset,0,1) < 0 && img->stoponerr) { ret = 0; break; } if (TIFFReadTile(tif, p2, col+img->col_offset, row+img->row_offset,0,2) < 0 && img->stoponerr) { ret = 0; break; } if (alpha) { if (TIFFReadTile(tif,pa,col+img->col_offset, row+img->row_offset,0,3) < 0 && img->stoponerr) { ret = 0; break; } } pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif); if (col + tw > w) { /* * Tile is clipped horizontally. Calculate * visible portion and skewing factors. */ uint32 npix = w - col; fromskew = tw - npix; (*put)(img, raster+y*w+col, col, y, npix, nrow, fromskew, toskew + fromskew, p0 + pos, p1 + pos, p2 + pos, (alpha?(pa+pos):NULL)); } else { (*put)(img, raster+y*w+col, col, y, tw, nrow, 0, toskew, p0 + pos, p1 + pos, p2 + pos, (alpha?(pa+pos):NULL)); } } y += (flip & FLIP_VERTICALLY ?-(int32) nrow : (int32) nrow); } if (flip & FLIP_HORIZONTALLY) { uint32 line; for (line = 0; line < h; line++) { uint32 *left = raster + (line * w); uint32 *right = left + w - 1; while ( left < right ) { uint32 temp = *left; *left = *right; *right = temp; left++, right--; } } } _TIFFfree(buf); return (ret); } /* * Get a strip-organized image that has * PlanarConfiguration contiguous if SamplesPerPixel > 1 * or * SamplesPerPixel == 1 */ static int gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) { TIFF* tif = img->tif; tileContigRoutine put = img->put.contig; uint32 row, y, nrow, nrowsub, rowstoread; uint32 pos; unsigned char* buf; uint32 rowsperstrip; uint16 subsamplinghor,subsamplingver; uint32 imagewidth = img->width; tsize_t scanline; int32 fromskew, toskew; int ret = 1, flip; buf = (unsigned char*) _TIFFmalloc(TIFFStripSize(tif)); if (buf == 0) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for strip buffer"); return (0); } _TIFFmemset(buf, 0, TIFFStripSize(tif)); flip = setorientation(img); if (flip & FLIP_VERTICALLY) { y = h - 1; toskew = -(int32)(w + w); } else { y = 0; toskew = -(int32)(w - w); } TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip); TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING, &subsamplinghor, &subsamplingver); scanline = TIFFNewScanlineSize(tif); fromskew = (w < imagewidth ? imagewidth - w : 0); for (row = 0; row < h; row += nrow) { rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip; nrow = (row + rowstoread > h ? h - row : rowstoread); nrowsub = nrow; if ((nrowsub%subsamplingver)!=0) nrowsub+=subsamplingver-nrowsub%subsamplingver; if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif,row+img->row_offset, 0), buf, ((row + img->row_offset)%rowsperstrip + nrowsub) * scanline) < 0 && img->stoponerr) { ret = 0; break; } pos = ((row + img->row_offset) % rowsperstrip) * scanline; (*put)(img, raster+y*w, 0, y, w, nrow, fromskew, toskew, buf + pos); y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow); } if (flip & FLIP_HORIZONTALLY) { uint32 line; for (line = 0; line < h; line++) { uint32 *left = raster + (line * w); uint32 *right = left + w - 1; while ( left < right ) { uint32 temp = *left; *left = *right; *right = temp; left++, right--; } } } _TIFFfree(buf); return (ret); } /* * Get a strip-organized image with * SamplesPerPixel > 1 * PlanarConfiguration separated * We assume that all such images are RGB. */ static int gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) { TIFF* tif = img->tif; tileSeparateRoutine put = img->put.separate; unsigned char *buf; unsigned char *p0, *p1, *p2, *pa; uint32 row, y, nrow, rowstoread; uint32 pos; tsize_t scanline; uint32 rowsperstrip, offset_row; uint32 imagewidth = img->width; tsize_t stripsize; int32 fromskew, toskew; int alpha = img->alpha; int ret = 1, flip; stripsize = TIFFStripSize(tif); p0 = buf = (unsigned char *)_TIFFmalloc((alpha?4:3)*stripsize); if (buf == 0) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer"); return (0); } _TIFFmemset(buf, 0, (alpha?4:3)*stripsize); p1 = p0 + stripsize; p2 = p1 + stripsize; pa = (alpha?(p2+stripsize):NULL); flip = setorientation(img); if (flip & FLIP_VERTICALLY) { y = h - 1; toskew = -(int32)(w + w); } else { y = 0; toskew = -(int32)(w - w); } TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip); scanline = TIFFScanlineSize(tif); fromskew = (w < imagewidth ? imagewidth - w : 0); for (row = 0; row < h; row += nrow) { rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip; nrow = (row + rowstoread > h ? h - row : rowstoread); offset_row = row + img->row_offset; if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 0), p0, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) < 0 && img->stoponerr) { ret = 0; break; } if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 1), p1, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) < 0 && img->stoponerr) { ret = 0; break; } if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 2), p2, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) < 0 && img->stoponerr) { ret = 0; break; } if (alpha) { if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 3), pa, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) < 0 && img->stoponerr) { ret = 0; break; } } pos = ((row + img->row_offset) % rowsperstrip) * scanline; (*put)(img, raster+y*w, 0, y, w, nrow, fromskew, toskew, p0 + pos, p1 + pos, p2 + pos, (alpha?(pa+pos):NULL)); y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow); } if (flip & FLIP_HORIZONTALLY) { uint32 line; for (line = 0; line < h; line++) { uint32 *left = raster + (line * w); uint32 *right = left + w - 1; while ( left < right ) { uint32 temp = *left; *left = *right; *right = temp; left++, right--; } } } _TIFFfree(buf); return (ret); } /* * The following routines move decoded data returned * from the TIFF library into rasters filled with packed * ABGR pixels (i.e. suitable for passing to lrecwrite.) * * The routines have been created according to the most * important cases and optimized. PickContigCase and * PickSeparateCase analyze the parameters and select * the appropriate "get" and "put" routine to use. */ #define REPEAT8(op) REPEAT4(op); REPEAT4(op) #define REPEAT4(op) REPEAT2(op); REPEAT2(op) #define REPEAT2(op) op; op #define CASE8(x,op) \ switch (x) { \ case 7: op; case 6: op; case 5: op; \ case 4: op; case 3: op; case 2: op; \ case 1: op; \ } #define CASE4(x,op) switch (x) { case 3: op; case 2: op; case 1: op; } #define NOP #define UNROLL8(w, op1, op2) { \ uint32 _x; \ for (_x = w; _x >= 8; _x -= 8) { \ op1; \ REPEAT8(op2); \ } \ if (_x > 0) { \ op1; \ CASE8(_x,op2); \ } \ } #define UNROLL4(w, op1, op2) { \ uint32 _x; \ for (_x = w; _x >= 4; _x -= 4) { \ op1; \ REPEAT4(op2); \ } \ if (_x > 0) { \ op1; \ CASE4(_x,op2); \ } \ } #define UNROLL2(w, op1, op2) { \ uint32 _x; \ for (_x = w; _x >= 2; _x -= 2) { \ op1; \ REPEAT2(op2); \ } \ if (_x) { \ op1; \ op2; \ } \ } #define SKEW(r,g,b,skew) { r += skew; g += skew; b += skew; } #define SKEW4(r,g,b,a,skew) { r += skew; g += skew; b += skew; a+= skew; } #define A1 (((uint32)0xffL)<<24) #define PACK(r,g,b) \ ((uint32)(r)|((uint32)(g)<<8)|((uint32)(b)<<16)|A1) #define PACK4(r,g,b,a) \ ((uint32)(r)|((uint32)(g)<<8)|((uint32)(b)<<16)|((uint32)(a)<<24)) #define W2B(v) (((v)>>8)&0xff) #define PACKW(r,g,b) \ ((uint32)W2B(r)|((uint32)W2B(g)<<8)|((uint32)W2B(b)<<16)|A1) #define PACKW4(r,g,b,a) \ ((uint32)W2B(r)|((uint32)W2B(g)<<8)|((uint32)W2B(b)<<16)|((uint32)W2B(a)<<24)) #define DECLAREContigPutFunc(name) \ static void name(\ TIFFRGBAImage* img, \ uint32* cp, \ uint32 x, uint32 y, \ uint32 w, uint32 h, \ int32 fromskew, int32 toskew, \ unsigned char* pp \ ) /* * 8-bit palette => colormap/RGB */ DECLAREContigPutFunc(put8bitcmaptile) { uint32** PALmap = img->PALmap; int samplesperpixel = img->samplesperpixel; (void) y; while (h-- > 0) { for (x = w; x-- > 0;) { *cp++ = PALmap[*pp][0]; pp += samplesperpixel; } cp += toskew; pp += fromskew; } } /* * 4-bit palette => colormap/RGB */ DECLAREContigPutFunc(put4bitcmaptile) { uint32** PALmap = img->PALmap; (void) x; (void) y; fromskew /= 2; while (h-- > 0) { uint32* bw; UNROLL2(w, bw = PALmap[*pp++], *cp++ = *bw++); cp += toskew; pp += fromskew; } } /* * 2-bit palette => colormap/RGB */ DECLAREContigPutFunc(put2bitcmaptile) { uint32** PALmap = img->PALmap; (void) x; (void) y; fromskew /= 4; while (h-- > 0) { uint32* bw; UNROLL4(w, bw = PALmap[*pp++], *cp++ = *bw++); cp += toskew; pp += fromskew; } } /* * 1-bit palette => colormap/RGB */ DECLAREContigPutFunc(put1bitcmaptile) { uint32** PALmap = img->PALmap; (void) x; (void) y; fromskew /= 8; while (h-- > 0) { uint32* bw; UNROLL8(w, bw = PALmap[*pp++], *cp++ = *bw++); cp += toskew; pp += fromskew; } } /* * 8-bit greyscale => colormap/RGB */ DECLAREContigPutFunc(putgreytile) { int samplesperpixel = img->samplesperpixel; uint32** BWmap = img->BWmap; (void) y; while (h-- > 0) { for (x = w; x-- > 0;) { *cp++ = BWmap[*pp][0]; pp += samplesperpixel; } cp += toskew; pp += fromskew; } } /* * 16-bit greyscale => colormap/RGB */ DECLAREContigPutFunc(put16bitbwtile) { int samplesperpixel = img->samplesperpixel; uint32** BWmap = img->BWmap; (void) y; while (h-- > 0) { uint16 *wp = (uint16 *) pp; for (x = w; x-- > 0;) { /* use high order byte of 16bit value */ *cp++ = BWmap[*wp >> 8][0]; pp += 2 * samplesperpixel; wp += samplesperpixel; } cp += toskew; pp += fromskew; } } /* * 1-bit bilevel => colormap/RGB */ DECLAREContigPutFunc(put1bitbwtile) { uint32** BWmap = img->BWmap; (void) x; (void) y; fromskew /= 8; while (h-- > 0) { uint32* bw; UNROLL8(w, bw = BWmap[*pp++], *cp++ = *bw++); cp += toskew; pp += fromskew; } } /* * 2-bit greyscale => colormap/RGB */ DECLAREContigPutFunc(put2bitbwtile) { uint32** BWmap = img->BWmap; (void) x; (void) y; fromskew /= 4; while (h-- > 0) { uint32* bw; UNROLL4(w, bw = BWmap[*pp++], *cp++ = *bw++); cp += toskew; pp += fromskew; } } /* * 4-bit greyscale => colormap/RGB */ DECLAREContigPutFunc(put4bitbwtile) { uint32** BWmap = img->BWmap; (void) x; (void) y; fromskew /= 2; while (h-- > 0) { uint32* bw; UNROLL2(w, bw = BWmap[*pp++], *cp++ = *bw++); cp += toskew; pp += fromskew; } } /* * 8-bit packed samples, no Map => RGB */ DECLAREContigPutFunc(putRGBcontig8bittile) { int samplesperpixel = img->samplesperpixel; (void) x; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { UNROLL8(w, NOP, *cp++ = PACK(pp[0], pp[1], pp[2]); pp += samplesperpixel); cp += toskew; pp += fromskew; } } /* * 8-bit packed samples => RGBA w/ associated alpha * (known to have Map == NULL) */ DECLAREContigPutFunc(putRGBAAcontig8bittile) { int samplesperpixel = img->samplesperpixel; (void) x; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { UNROLL8(w, NOP, *cp++ = PACK4(pp[0], pp[1], pp[2], pp[3]); pp += samplesperpixel); cp += toskew; pp += fromskew; } } /* * 8-bit packed samples => RGBA w/ unassociated alpha * (known to have Map == NULL) */ DECLAREContigPutFunc(putRGBUAcontig8bittile) { int samplesperpixel = img->samplesperpixel; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { uint32 r, g, b, a; for (x = w; x-- > 0;) { a = pp[3]; r = (a*pp[0] + 127) / 255; g = (a*pp[1] + 127) / 255; b = (a*pp[2] + 127) / 255; *cp++ = PACK4(r,g,b,a); pp += samplesperpixel; } cp += toskew; pp += fromskew; } } /* * 16-bit packed samples => RGB */ DECLAREContigPutFunc(putRGBcontig16bittile) { int samplesperpixel = img->samplesperpixel; uint16 *wp = (uint16 *)pp; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { for (x = w; x-- > 0;) { *cp++ = PACKW(wp[0],wp[1],wp[2]); wp += samplesperpixel; } cp += toskew; wp += fromskew; } } /* * 16-bit packed samples => RGBA w/ associated alpha * (known to have Map == NULL) */ DECLAREContigPutFunc(putRGBAAcontig16bittile) { int samplesperpixel = img->samplesperpixel; uint16 *wp = (uint16 *)pp; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { for (x = w; x-- > 0;) { *cp++ = PACKW4(wp[0],wp[1],wp[2],wp[3]); wp += samplesperpixel; } cp += toskew; wp += fromskew; } } /* * 16-bit packed samples => RGBA w/ unassociated alpha * (known to have Map == NULL) */ DECLAREContigPutFunc(putRGBUAcontig16bittile) { int samplesperpixel = img->samplesperpixel; uint16 *wp = (uint16 *)pp; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { uint32 r,g,b,a; for (x = w; x-- > 0;) { a = W2B(wp[3]); r = (a*W2B(wp[0]) + 127) / 255; g = (a*W2B(wp[1]) + 127) / 255; b = (a*W2B(wp[2]) + 127) / 255; *cp++ = PACK4(r,g,b,a); wp += samplesperpixel; } cp += toskew; wp += fromskew; } } /* * 8-bit packed CMYK samples w/o Map => RGB * * NB: The conversion of CMYK->RGB is *very* crude. */ DECLAREContigPutFunc(putRGBcontig8bitCMYKtile) { int samplesperpixel = img->samplesperpixel; uint16 r, g, b, k; (void) x; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { UNROLL8(w, NOP, k = 255 - pp[3]; r = (k*(255-pp[0]))/255; g = (k*(255-pp[1]))/255; b = (k*(255-pp[2]))/255; *cp++ = PACK(r, g, b); pp += samplesperpixel); cp += toskew; pp += fromskew; } } /* * 8-bit packed CMYK samples w/Map => RGB * * NB: The conversion of CMYK->RGB is *very* crude. */ DECLAREContigPutFunc(putRGBcontig8bitCMYKMaptile) { int samplesperpixel = img->samplesperpixel; TIFFRGBValue* Map = img->Map; uint16 r, g, b, k; (void) y; fromskew *= samplesperpixel; while (h-- > 0) { for (x = w; x-- > 0;) { k = 255 - pp[3]; r = (k*(255-pp[0]))/255; g = (k*(255-pp[1]))/255; b = (k*(255-pp[2]))/255; *cp++ = PACK(Map[r], Map[g], Map[b]); pp += samplesperpixel; } pp += fromskew; cp += toskew; } } #define DECLARESepPutFunc(name) \ static void name(\ TIFFRGBAImage* img,\ uint32* cp,\ uint32 x, uint32 y, \ uint32 w, uint32 h,\ int32 fromskew, int32 toskew,\ unsigned char* r, unsigned char* g, unsigned char* b, unsigned char* a\ ) /* * 8-bit unpacked samples => RGB */ DECLARESepPutFunc(putRGBseparate8bittile) { (void) img; (void) x; (void) y; (void) a; while (h-- > 0) { UNROLL8(w, NOP, *cp++ = PACK(*r++, *g++, *b++)); SKEW(r, g, b, fromskew); cp += toskew; } } /* * 8-bit unpacked samples => RGBA w/ associated alpha */ DECLARESepPutFunc(putRGBAAseparate8bittile) { (void) img; (void) x; (void) y; while (h-- > 0) { UNROLL8(w, NOP, *cp++ = PACK4(*r++, *g++, *b++, *a++)); SKEW4(r, g, b, a, fromskew); cp += toskew; } } /* * 8-bit unpacked samples => RGBA w/ unassociated alpha */ DECLARESepPutFunc(putRGBUAseparate8bittile) { (void) img; (void) y; while (h-- > 0) { uint32 rv, gv, bv, av; for (x = w; x-- > 0;) { av = *a++; rv = (av* *r++ + 127) / 255; gv = (av* *g++ + 127) / 255; bv = (av* *b++ + 127) / 255; *cp++ = PACK4(rv,gv,bv,av); } SKEW4(r, g, b, a, fromskew); cp += toskew; } } /* * 16-bit unpacked samples => RGB */ DECLARESepPutFunc(putRGBseparate16bittile) { uint16 *wr = (uint16*) r; uint16 *wg = (uint16*) g; uint16 *wb = (uint16*) b; (void) img; (void) y; (void) a; while (h-- > 0) { for (x = 0; x < w; x++) *cp++ = PACKW(*wr++,*wg++,*wb++); SKEW(wr, wg, wb, fromskew); cp += toskew; } } /* * 16-bit unpacked samples => RGBA w/ associated alpha */ DECLARESepPutFunc(putRGBAAseparate16bittile) { uint16 *wr = (uint16*) r; uint16 *wg = (uint16*) g; uint16 *wb = (uint16*) b; uint16 *wa = (uint16*) a; (void) img; (void) y; while (h-- > 0) { for (x = 0; x < w; x++) *cp++ = PACKW4(*wr++,*wg++,*wb++,*wa++); SKEW4(wr, wg, wb, wa, fromskew); cp += toskew; } } /* * 16-bit unpacked samples => RGBA w/ unassociated alpha */ DECLARESepPutFunc(putRGBUAseparate16bittile) { uint16 *wr = (uint16*) r; uint16 *wg = (uint16*) g; uint16 *wb = (uint16*) b; uint16 *wa = (uint16*) a; (void) img; (void) y; while (h-- > 0) { uint32 r,g,b,a; for (x = w; x-- > 0;) { a = W2B(*wa++); r = (a*W2B(*wr++) + 127) / 255; g = (a*W2B(*wg++) + 127) / 255; b = (a*W2B(*wb++) + 127) / 255; *cp++ = PACK4(r,g,b,a); } SKEW4(wr, wg, wb, wa, fromskew); cp += toskew; } } /* * 8-bit packed CIE L*a*b 1976 samples => RGB */ DECLAREContigPutFunc(putcontig8bitCIELab) { float X, Y, Z; uint32 r, g, b; (void) y; fromskew *= 3; while (h-- > 0) { for (x = w; x-- > 0;) { TIFFCIELabToXYZ(img->cielab, (unsigned char)pp[0], (signed char)pp[1], (signed char)pp[2], &X, &Y, &Z); TIFFXYZToRGB(img->cielab, X, Y, Z, &r, &g, &b); *cp++ = PACK(r, g, b); pp += 3; } cp += toskew; pp += fromskew; } } /* * YCbCr -> RGB conversion and packing routines. */ #define YCbCrtoRGB(dst, Y) { \ uint32 r, g, b; \ TIFFYCbCrtoRGB(img->ycbcr, (Y), Cb, Cr, &r, &g, &b); \ dst = PACK(r, g, b); \ } /* * 8-bit packed YCbCr samples => RGB * This function is generic for different sampling sizes, * and can handle blocks sizes that aren't multiples of the * sampling size. However, it is substantially less optimized * than the specific sampling cases. It is used as a fallback * for difficult blocks. */ #ifdef notdef static void putcontig8bitYCbCrGenericTile( TIFFRGBAImage* img, uint32* cp, uint32 x, uint32 y, uint32 w, uint32 h, int32 fromskew, int32 toskew, unsigned char* pp, int h_group, int v_group ) { uint32* cp1 = cp+w+toskew; uint32* cp2 = cp1+w+toskew; uint32* cp3 = cp2+w+toskew; int32 incr = 3*w+4*toskew; int32 Cb, Cr; int group_size = v_group * h_group + 2; (void) y; fromskew = (fromskew * group_size) / h_group; for( yy = 0; yy < h; yy++ ) { unsigned char *pp_line; int y_line_group = yy / v_group; int y_remainder = yy - y_line_group * v_group; pp_line = pp + v_line_group * for( xx = 0; xx < w; xx++ ) { Cb = pp } } for (; h >= 4; h -= 4) { x = w>>2; do { Cb = pp[16]; Cr = pp[17]; YCbCrtoRGB(cp [0], pp[ 0]); YCbCrtoRGB(cp [1], pp[ 1]); YCbCrtoRGB(cp [2], pp[ 2]); YCbCrtoRGB(cp [3], pp[ 3]); YCbCrtoRGB(cp1[0], pp[ 4]); YCbCrtoRGB(cp1[1], pp[ 5]); YCbCrtoRGB(cp1[2], pp[ 6]); YCbCrtoRGB(cp1[3], pp[ 7]); YCbCrtoRGB(cp2[0], pp[ 8]); YCbCrtoRGB(cp2[1], pp[ 9]); YCbCrtoRGB(cp2[2], pp[10]); YCbCrtoRGB(cp2[3], pp[11]); YCbCrtoRGB(cp3[0], pp[12]); YCbCrtoRGB(cp3[1], pp[13]); YCbCrtoRGB(cp3[2], pp[14]); YCbCrtoRGB(cp3[3], pp[15]); cp += 4, cp1 += 4, cp2 += 4, cp3 += 4; pp += 18; } while (--x); cp += incr, cp1 += incr, cp2 += incr, cp3 += incr; pp += fromskew; } } #endif /* * 8-bit packed YCbCr samples w/ 4,4 subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr44tile) { uint32* cp1 = cp+w+toskew; uint32* cp2 = cp1+w+toskew; uint32* cp3 = cp2+w+toskew; int32 incr = 3*w+4*toskew; (void) y; /* adjust fromskew */ fromskew = (fromskew * 18) / 4; if ((h & 3) == 0 && (w & 3) == 0) { for (; h >= 4; h -= 4) { x = w>>2; do { int32 Cb = pp[16]; int32 Cr = pp[17]; YCbCrtoRGB(cp [0], pp[ 0]); YCbCrtoRGB(cp [1], pp[ 1]); YCbCrtoRGB(cp [2], pp[ 2]); YCbCrtoRGB(cp [3], pp[ 3]); YCbCrtoRGB(cp1[0], pp[ 4]); YCbCrtoRGB(cp1[1], pp[ 5]); YCbCrtoRGB(cp1[2], pp[ 6]); YCbCrtoRGB(cp1[3], pp[ 7]); YCbCrtoRGB(cp2[0], pp[ 8]); YCbCrtoRGB(cp2[1], pp[ 9]); YCbCrtoRGB(cp2[2], pp[10]); YCbCrtoRGB(cp2[3], pp[11]); YCbCrtoRGB(cp3[0], pp[12]); YCbCrtoRGB(cp3[1], pp[13]); YCbCrtoRGB(cp3[2], pp[14]); YCbCrtoRGB(cp3[3], pp[15]); cp += 4, cp1 += 4, cp2 += 4, cp3 += 4; pp += 18; } while (--x); cp += incr, cp1 += incr, cp2 += incr, cp3 += incr; pp += fromskew; } } else { while (h > 0) { for (x = w; x > 0;) { int32 Cb = pp[16]; int32 Cr = pp[17]; switch (x) { default: switch (h) { default: YCbCrtoRGB(cp3[3], pp[15]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[3], pp[11]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[3], pp[ 7]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [3], pp[ 3]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 3: switch (h) { default: YCbCrtoRGB(cp3[2], pp[14]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[2], pp[10]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[2], pp[ 6]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [2], pp[ 2]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 2: switch (h) { default: YCbCrtoRGB(cp3[1], pp[13]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[1], pp[ 9]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[1], pp[ 5]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [1], pp[ 1]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 1: switch (h) { default: YCbCrtoRGB(cp3[0], pp[12]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[0], pp[ 8]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[0], pp[ 4]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [0], pp[ 0]); /* FALLTHROUGH */ } /* FALLTHROUGH */ } if (x < 4) { cp += x; cp1 += x; cp2 += x; cp3 += x; x = 0; } else { cp += 4; cp1 += 4; cp2 += 4; cp3 += 4; x -= 4; } pp += 18; } if (h <= 4) break; h -= 4; cp += incr, cp1 += incr, cp2 += incr, cp3 += incr; pp += fromskew; } } } /* * 8-bit packed YCbCr samples w/ 4,2 subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr42tile) { uint32* cp1 = cp+w+toskew; int32 incr = 2*toskew+w; (void) y; fromskew = (fromskew * 10) / 4; if ((h & 3) == 0 && (w & 1) == 0) { for (; h >= 2; h -= 2) { x = w>>2; do { int32 Cb = pp[8]; int32 Cr = pp[9]; YCbCrtoRGB(cp [0], pp[0]); YCbCrtoRGB(cp [1], pp[1]); YCbCrtoRGB(cp [2], pp[2]); YCbCrtoRGB(cp [3], pp[3]); YCbCrtoRGB(cp1[0], pp[4]); YCbCrtoRGB(cp1[1], pp[5]); YCbCrtoRGB(cp1[2], pp[6]); YCbCrtoRGB(cp1[3], pp[7]); cp += 4, cp1 += 4; pp += 10; } while (--x); cp += incr, cp1 += incr; pp += fromskew; } } else { while (h > 0) { for (x = w; x > 0;) { int32 Cb = pp[8]; int32 Cr = pp[9]; switch (x) { default: switch (h) { default: YCbCrtoRGB(cp1[3], pp[ 7]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [3], pp[ 3]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 3: switch (h) { default: YCbCrtoRGB(cp1[2], pp[ 6]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [2], pp[ 2]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 2: switch (h) { default: YCbCrtoRGB(cp1[1], pp[ 5]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [1], pp[ 1]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 1: switch (h) { default: YCbCrtoRGB(cp1[0], pp[ 4]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [0], pp[ 0]); /* FALLTHROUGH */ } /* FALLTHROUGH */ } if (x < 4) { cp += x; cp1 += x; x = 0; } else { cp += 4; cp1 += 4; x -= 4; } pp += 10; } if (h <= 2) break; h -= 2; cp += incr, cp1 += incr; pp += fromskew; } } } /* * 8-bit packed YCbCr samples w/ 4,1 subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr41tile) { (void) y; /* XXX adjust fromskew */ do { x = w>>2; do { int32 Cb = pp[4]; int32 Cr = pp[5]; YCbCrtoRGB(cp [0], pp[0]); YCbCrtoRGB(cp [1], pp[1]); YCbCrtoRGB(cp [2], pp[2]); YCbCrtoRGB(cp [3], pp[3]); cp += 4; pp += 6; } while (--x); if( (w&3) != 0 ) { int32 Cb = pp[4]; int32 Cr = pp[5]; switch( (w&3) ) { case 3: YCbCrtoRGB(cp [2], pp[2]); case 2: YCbCrtoRGB(cp [1], pp[1]); case 1: YCbCrtoRGB(cp [0], pp[0]); case 0: break; } cp += (w&3); pp += 6; } cp += toskew; pp += fromskew; } while (--h); } /* * 8-bit packed YCbCr samples w/ 2,2 subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr22tile) { uint32* cp2; (void) y; fromskew = (fromskew / 2) * 6; cp2 = cp+w+toskew; while (h>=2) { x = w; while (x>=2) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp[1], pp[1]); YCbCrtoRGB(cp2[0], pp[2]); YCbCrtoRGB(cp2[1], pp[3]); cp += 2; cp2 += 2; pp += 6; x -= 2; } if (x==1) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp2[0], pp[2]); cp ++ ; cp2 ++ ; pp += 6; } cp += toskew*2+w; cp2 += toskew*2+w; pp += fromskew; h-=2; } if (h==1) { x = w; while (x>=2) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp[1], pp[1]); cp += 2; cp2 += 2; pp += 6; x -= 2; } if (x==1) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); } } } /* * 8-bit packed YCbCr samples w/ 2,1 subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr21tile) { (void) y; fromskew = (fromskew * 4) / 2; do { x = w>>1; do { int32 Cb = pp[2]; int32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp[1], pp[1]); cp += 2; pp += 4; } while (--x); if( (w&1) != 0 ) { int32 Cb = pp[2]; int32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); cp += 1; pp += 4; } cp += toskew; pp += fromskew; } while (--h); } /* * 8-bit packed YCbCr samples w/ 1,2 subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr12tile) { uint32* cp2; (void) y; fromskew = (fromskew / 2) * 4; cp2 = cp+w+toskew; while (h>=2) { x = w; do { uint32 Cb = pp[2]; uint32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp2[0], pp[1]); cp ++; cp2 ++; pp += 4; } while (--x); cp += toskew*2+w; cp2 += toskew*2+w; pp += fromskew; h-=2; } if (h==1) { x = w; do { uint32 Cb = pp[2]; uint32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); cp ++; pp += 4; } while (--x); } } /* * 8-bit packed YCbCr samples w/ no subsampling => RGB */ DECLAREContigPutFunc(putcontig8bitYCbCr11tile) { (void) y; fromskew *= 3; do { x = w; /* was x = w>>1; patched 2000/09/25 warmerda@home.com */ do { int32 Cb = pp[1]; int32 Cr = pp[2]; YCbCrtoRGB(*cp++, pp[0]); pp += 3; } while (--x); cp += toskew; pp += fromskew; } while (--h); } /* * 8-bit packed YCbCr samples w/ no subsampling => RGB */ DECLARESepPutFunc(putseparate8bitYCbCr11tile) { (void) y; (void) a; /* TODO: naming of input vars is still off, change obfuscating declaration inside define, or resolve obfuscation */ while (h-- > 0) { x = w; do { uint32 dr, dg, db; TIFFYCbCrtoRGB(img->ycbcr,*r++,*g++,*b++,&dr,&dg,&db); *cp++ = PACK(dr,dg,db); } while (--x); SKEW(r, g, b, fromskew); cp += toskew; } } #undef YCbCrtoRGB static int initYCbCrConversion(TIFFRGBAImage* img) { static char module[] = "initYCbCrConversion"; float *luma, *refBlackWhite; if (img->ycbcr == NULL) { img->ycbcr = (TIFFYCbCrToRGB*) _TIFFmalloc( TIFFroundup(sizeof (TIFFYCbCrToRGB), sizeof (long)) + 4*256*sizeof (TIFFRGBValue) + 2*256*sizeof (int) + 3*256*sizeof (int32) ); if (img->ycbcr == NULL) { TIFFErrorExt(img->tif->tif_clientdata, module, "No space for YCbCr->RGB conversion state"); return (0); } } TIFFGetFieldDefaulted(img->tif, TIFFTAG_YCBCRCOEFFICIENTS, &luma); TIFFGetFieldDefaulted(img->tif, TIFFTAG_REFERENCEBLACKWHITE, &refBlackWhite); if (TIFFYCbCrToRGBInit(img->ycbcr, luma, refBlackWhite) < 0) return(0); return (1); } static tileContigRoutine initCIELabConversion(TIFFRGBAImage* img) { static char module[] = "initCIELabConversion"; float *whitePoint; float refWhite[3]; if (!img->cielab) { img->cielab = (TIFFCIELabToRGB *) _TIFFmalloc(sizeof(TIFFCIELabToRGB)); if (!img->cielab) { TIFFErrorExt(img->tif->tif_clientdata, module, "No space for CIE L*a*b*->RGB conversion state."); return NULL; } } TIFFGetFieldDefaulted(img->tif, TIFFTAG_WHITEPOINT, &whitePoint); refWhite[1] = 100.0F; refWhite[0] = whitePoint[0] / whitePoint[1] * refWhite[1]; refWhite[2] = (1.0F - whitePoint[0] - whitePoint[1]) / whitePoint[1] * refWhite[1]; if (TIFFCIELabToRGBInit(img->cielab, &display_sRGB, refWhite) < 0) { TIFFErrorExt(img->tif->tif_clientdata, module, "Failed to initialize CIE L*a*b*->RGB conversion state."); _TIFFfree(img->cielab); return NULL; } return putcontig8bitCIELab; } /* * Greyscale images with less than 8 bits/sample are handled * with a table to avoid lots of shifts and masks. The table * is setup so that put*bwtile (below) can retrieve 8/bitspersample * pixel values simply by indexing into the table with one * number. */ static int makebwmap(TIFFRGBAImage* img) { TIFFRGBValue* Map = img->Map; int bitspersample = img->bitspersample; int nsamples = 8 / bitspersample; int i; uint32* p; if( nsamples == 0 ) nsamples = 1; img->BWmap = (uint32**) _TIFFmalloc( 256*sizeof (uint32 *)+(256*nsamples*sizeof(uint32))); if (img->BWmap == NULL) { TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No space for B&W mapping table"); return (0); } p = (uint32*)(img->BWmap + 256); for (i = 0; i < 256; i++) { TIFFRGBValue c; img->BWmap[i] = p; switch (bitspersample) { #define GREY(x) c = Map[x]; *p++ = PACK(c,c,c); case 1: GREY(i>>7); GREY((i>>6)&1); GREY((i>>5)&1); GREY((i>>4)&1); GREY((i>>3)&1); GREY((i>>2)&1); GREY((i>>1)&1); GREY(i&1); break; case 2: GREY(i>>6); GREY((i>>4)&3); GREY((i>>2)&3); GREY(i&3); break; case 4: GREY(i>>4); GREY(i&0xf); break; case 8: case 16: GREY(i); break; } #undef GREY } return (1); } /* * Construct a mapping table to convert from the range * of the data samples to [0,255] --for display. This * process also handles inverting B&W images when needed. */ static int setupMap(TIFFRGBAImage* img) { int32 x, range; range = (int32)((1L<bitspersample)-1); /* treat 16 bit the same as eight bit */ if( img->bitspersample == 16 ) range = (int32) 255; img->Map = (TIFFRGBValue*) _TIFFmalloc((range+1) * sizeof (TIFFRGBValue)); if (img->Map == NULL) { TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No space for photometric conversion table"); return (0); } if (img->photometric == PHOTOMETRIC_MINISWHITE) { for (x = 0; x <= range; x++) img->Map[x] = (TIFFRGBValue) (((range - x) * 255) / range); } else { for (x = 0; x <= range; x++) img->Map[x] = (TIFFRGBValue) ((x * 255) / range); } if (img->bitspersample <= 16 && (img->photometric == PHOTOMETRIC_MINISBLACK || img->photometric == PHOTOMETRIC_MINISWHITE)) { /* * Use photometric mapping table to construct * unpacking tables for samples <= 8 bits. */ if (!makebwmap(img)) return (0); /* no longer need Map, free it */ _TIFFfree(img->Map), img->Map = NULL; } return (1); } static int checkcmap(TIFFRGBAImage* img) { uint16* r = img->redcmap; uint16* g = img->greencmap; uint16* b = img->bluecmap; long n = 1L<bitspersample; while (n-- > 0) if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256) return (16); return (8); } static void cvtcmap(TIFFRGBAImage* img) { uint16* r = img->redcmap; uint16* g = img->greencmap; uint16* b = img->bluecmap; long i; for (i = (1L<bitspersample)-1; i >= 0; i--) { #define CVT(x) ((uint16)((x)>>8)) r[i] = CVT(r[i]); g[i] = CVT(g[i]); b[i] = CVT(b[i]); #undef CVT } } /* * Palette images with <= 8 bits/sample are handled * with a table to avoid lots of shifts and masks. The table * is setup so that put*cmaptile (below) can retrieve 8/bitspersample * pixel values simply by indexing into the table with one * number. */ static int makecmap(TIFFRGBAImage* img) { int bitspersample = img->bitspersample; int nsamples = 8 / bitspersample; uint16* r = img->redcmap; uint16* g = img->greencmap; uint16* b = img->bluecmap; uint32 *p; int i; img->PALmap = (uint32**) _TIFFmalloc( 256*sizeof (uint32 *)+(256*nsamples*sizeof(uint32))); if (img->PALmap == NULL) { TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No space for Palette mapping table"); return (0); } p = (uint32*)(img->PALmap + 256); for (i = 0; i < 256; i++) { TIFFRGBValue c; img->PALmap[i] = p; #define CMAP(x) c = (TIFFRGBValue) x; *p++ = PACK(r[c]&0xff, g[c]&0xff, b[c]&0xff); switch (bitspersample) { case 1: CMAP(i>>7); CMAP((i>>6)&1); CMAP((i>>5)&1); CMAP((i>>4)&1); CMAP((i>>3)&1); CMAP((i>>2)&1); CMAP((i>>1)&1); CMAP(i&1); break; case 2: CMAP(i>>6); CMAP((i>>4)&3); CMAP((i>>2)&3); CMAP(i&3); break; case 4: CMAP(i>>4); CMAP(i&0xf); break; case 8: CMAP(i); break; } #undef CMAP } return (1); } /* * Construct any mapping table used * by the associated put routine. */ static int buildMap(TIFFRGBAImage* img) { switch (img->photometric) { case PHOTOMETRIC_RGB: case PHOTOMETRIC_YCBCR: case PHOTOMETRIC_SEPARATED: if (img->bitspersample == 8) break; /* fall thru... */ case PHOTOMETRIC_MINISBLACK: case PHOTOMETRIC_MINISWHITE: if (!setupMap(img)) return (0); break; case PHOTOMETRIC_PALETTE: /* * Convert 16-bit colormap to 8-bit (unless it looks * like an old-style 8-bit colormap). */ if (checkcmap(img) == 16) cvtcmap(img); else TIFFWarningExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "Assuming 8-bit colormap"); /* * Use mapping table and colormap to construct * unpacking tables for samples < 8 bits. */ if (img->bitspersample <= 8 && !makecmap(img)) return (0); break; } return (1); } /* * Select the appropriate conversion routine for packed data. */ static int PickContigCase(TIFFRGBAImage* img) { img->get = TIFFIsTiled(img->tif) ? gtTileContig : gtStripContig; img->put.contig = NULL; switch (img->photometric) { case PHOTOMETRIC_RGB: switch (img->bitspersample) { case 8: if (img->alpha == EXTRASAMPLE_ASSOCALPHA) img->put.contig = putRGBAAcontig8bittile; else if (img->alpha == EXTRASAMPLE_UNASSALPHA) { img->put.contig = putRGBUAcontig8bittile; } else img->put.contig = putRGBcontig8bittile; break; case 16: if (img->alpha == EXTRASAMPLE_ASSOCALPHA) { img->put.contig = putRGBAAcontig16bittile; } else if (img->alpha == EXTRASAMPLE_UNASSALPHA) { img->put.contig = putRGBUAcontig16bittile; } else { img->put.contig = putRGBcontig16bittile; } break; } break; case PHOTOMETRIC_SEPARATED: if (buildMap(img)) { if (img->bitspersample == 8) { if (!img->Map) img->put.contig = putRGBcontig8bitCMYKtile; else img->put.contig = putRGBcontig8bitCMYKMaptile; } } break; case PHOTOMETRIC_PALETTE: if (buildMap(img)) { switch (img->bitspersample) { case 8: img->put.contig = put8bitcmaptile; break; case 4: img->put.contig = put4bitcmaptile; break; case 2: img->put.contig = put2bitcmaptile; break; case 1: img->put.contig = put1bitcmaptile; break; } } break; case PHOTOMETRIC_MINISWHITE: case PHOTOMETRIC_MINISBLACK: if (buildMap(img)) { switch (img->bitspersample) { case 16: img->put.contig = put16bitbwtile; break; case 8: img->put.contig = putgreytile; break; case 4: img->put.contig = put4bitbwtile; break; case 2: img->put.contig = put2bitbwtile; break; case 1: img->put.contig = put1bitbwtile; break; } } break; case PHOTOMETRIC_YCBCR: if (img->bitspersample == 8) { if (initYCbCrConversion(img)!=0) { /* * The 6.0 spec says that subsampling must be * one of 1, 2, or 4, and that vertical subsampling * must always be <= horizontal subsampling; so * there are only a few possibilities and we just * enumerate the cases. * Joris: added support for the [1,2] case, nonetheless, to accomodate * some OJPEG files */ uint16 SubsamplingHor; uint16 SubsamplingVer; TIFFGetFieldDefaulted(img->tif, TIFFTAG_YCBCRSUBSAMPLING, &SubsamplingHor, &SubsamplingVer); switch ((SubsamplingHor<<4)|SubsamplingVer) { case 0x44: img->put.contig = putcontig8bitYCbCr44tile; break; case 0x42: img->put.contig = putcontig8bitYCbCr42tile; break; case 0x41: img->put.contig = putcontig8bitYCbCr41tile; break; case 0x22: img->put.contig = putcontig8bitYCbCr22tile; break; case 0x21: img->put.contig = putcontig8bitYCbCr21tile; break; case 0x12: img->put.contig = putcontig8bitYCbCr12tile; break; case 0x11: img->put.contig = putcontig8bitYCbCr11tile; break; } } } break; case PHOTOMETRIC_CIELAB: if (buildMap(img)) { if (img->bitspersample == 8) img->put.contig = initCIELabConversion(img); break; } } return ((img->get!=NULL) && (img->put.contig!=NULL)); } /* * Select the appropriate conversion routine for unpacked data. * * NB: we assume that unpacked single channel data is directed * to the "packed routines. */ static int PickSeparateCase(TIFFRGBAImage* img) { img->get = TIFFIsTiled(img->tif) ? gtTileSeparate : gtStripSeparate; img->put.separate = NULL; switch (img->photometric) { case PHOTOMETRIC_RGB: switch (img->bitspersample) { case 8: if (img->alpha == EXTRASAMPLE_ASSOCALPHA) img->put.separate = putRGBAAseparate8bittile; else if (img->alpha == EXTRASAMPLE_UNASSALPHA) { img->put.separate = putRGBUAseparate8bittile; } else img->put.separate = putRGBseparate8bittile; break; case 16: if (img->alpha == EXTRASAMPLE_ASSOCALPHA) { img->put.separate = putRGBAAseparate16bittile; } else if (img->alpha == EXTRASAMPLE_UNASSALPHA) { img->put.separate = putRGBUAseparate16bittile; } else { img->put.separate = putRGBseparate16bittile; } break; } break; case PHOTOMETRIC_YCBCR: if ((img->bitspersample==8) && (img->samplesperpixel==3)) { if (initYCbCrConversion(img)!=0) { uint16 hs, vs; TIFFGetFieldDefaulted(img->tif, TIFFTAG_YCBCRSUBSAMPLING, &hs, &vs); switch ((hs<<4)|vs) { case 0x11: img->put.separate = putseparate8bitYCbCr11tile; break; /* TODO: add other cases here */ } } } break; } return ((img->get!=NULL) && (img->put.separate!=NULL)); } /* * Read a whole strip off data from the file, and convert to RGBA form. * If this is the last strip, then it will only contain the portion of * the strip that is actually within the image space. The result is * organized in bottom to top form. */ int TIFFReadRGBAStrip(TIFF* tif, uint32 row, uint32 * raster ) { char emsg[1024] = ""; TIFFRGBAImage img; int ok; uint32 rowsperstrip, rows_to_read; if( TIFFIsTiled( tif ) ) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Can't use TIFFReadRGBAStrip() with tiled file."); return (0); } TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip); if( (row % rowsperstrip) != 0 ) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Row passed to TIFFReadRGBAStrip() must be first in a strip."); return (0); } if (TIFFRGBAImageOK(tif, emsg) && TIFFRGBAImageBegin(&img, tif, 0, emsg)) { img.row_offset = row; img.col_offset = 0; if( row + rowsperstrip > img.height ) rows_to_read = img.height - row; else rows_to_read = rowsperstrip; ok = TIFFRGBAImageGet(&img, raster, img.width, rows_to_read ); TIFFRGBAImageEnd(&img); } else { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", emsg); ok = 0; } return (ok); } /* * Read a whole tile off data from the file, and convert to RGBA form. * The returned RGBA data is organized from bottom to top of tile, * and may include zeroed areas if the tile extends off the image. */ int TIFFReadRGBATile(TIFF* tif, uint32 col, uint32 row, uint32 * raster) { char emsg[1024] = ""; TIFFRGBAImage img; int ok; uint32 tile_xsize, tile_ysize; uint32 read_xsize, read_ysize; uint32 i_row; /* * Verify that our request is legal - on a tile file, and on a * tile boundary. */ if( !TIFFIsTiled( tif ) ) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Can't use TIFFReadRGBATile() with stripped file."); return (0); } TIFFGetFieldDefaulted(tif, TIFFTAG_TILEWIDTH, &tile_xsize); TIFFGetFieldDefaulted(tif, TIFFTAG_TILELENGTH, &tile_ysize); if( (col % tile_xsize) != 0 || (row % tile_ysize) != 0 ) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Row/col passed to TIFFReadRGBATile() must be top" "left corner of a tile."); return (0); } /* * Setup the RGBA reader. */ if (!TIFFRGBAImageOK(tif, emsg) || !TIFFRGBAImageBegin(&img, tif, 0, emsg)) { TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", emsg); return( 0 ); } /* * The TIFFRGBAImageGet() function doesn't allow us to get off the * edge of the image, even to fill an otherwise valid tile. So we * figure out how much we can read, and fix up the tile buffer to * a full tile configuration afterwards. */ if( row + tile_ysize > img.height ) read_ysize = img.height - row; else read_ysize = tile_ysize; if( col + tile_xsize > img.width ) read_xsize = img.width - col; else read_xsize = tile_xsize; /* * Read the chunk of imagery. */ img.row_offset = row; img.col_offset = col; ok = TIFFRGBAImageGet(&img, raster, read_xsize, read_ysize ); TIFFRGBAImageEnd(&img); /* * If our read was incomplete we will need to fix up the tile by * shifting the data around as if a full tile of data is being returned. * * This is all the more complicated because the image is organized in * bottom to top format. */ if( read_xsize == tile_xsize && read_ysize == tile_ysize ) return( ok ); for( i_row = 0; i_row < read_ysize; i_row++ ) { memmove( raster + (tile_ysize - i_row - 1) * tile_xsize, raster + (read_ysize - i_row - 1) * read_xsize, read_xsize * sizeof(uint32) ); _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize+read_xsize, 0, sizeof(uint32) * (tile_xsize - read_xsize) ); } for( i_row = read_ysize; i_row < tile_ysize; i_row++ ) { _TIFFmemset( raster + (tile_ysize - i_row - 1) * tile_xsize, 0, sizeof(uint32) * tile_xsize ); } return (ok); } /* vim: set ts=8 sts=8 sw=8 noet: */ /* * Local Variables: * mode: c * c-basic-offset: 8 * fill-column: 78 * End: */