diff --git a/libtiff/tif_getimage.c b/libtiff/tif_getimage.c index e2d38038..5fa0dee4 100644 --- a/libtiff/tif_getimage.c +++ b/libtiff/tif_getimage.c @@ -1,4 +1,4 @@ -/* $Id: tif_getimage.c,v 1.50 2006-03-25 03:09:24 joris Exp $ */ +/* $Id: tif_getimage.c,v 1.51 2006-03-26 16:39:30 joris Exp $ */ /* * Copyright (c) 1991-1997 Sam Leffler @@ -221,221 +221,224 @@ isCCITTCompression(TIFF* tif) 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; + 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; + /* 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( !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; - } + 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); + 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); - } + /* 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: - if (planarconfig != PLANARCONFIG_CONTIG) { - sprintf(emsg, "Sorry, can not handle YCbCr images with %s=%d", - "Planarconfiguration", planarconfig); - return (0); - } - /* 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_OJPEG: - case COMPRESSION_JPEG: - TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB); - img->photometric = PHOTOMETRIC_RGB; - break; + _TIFFmemcpy( img->redcmap, red_orig, n_color * 2 ); + _TIFFmemcpy( img->greencmap, green_orig, n_color * 2 ); + _TIFFmemcpy( img->bluecmap, blue_orig, n_color * 2 ); - default: - /* do nothing */; - break; - } - break; - case PHOTOMETRIC_RGB: - if (colorchannels < 3) { - sprintf(emsg, "Sorry, can not handle RGB image with %s=%d", - "Color channels", colorchannels); - return (0); + /* 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: + if (planarconfig != PLANARCONFIG_CONTIG) { + sprintf(emsg, "Sorry, can not handle YCbCr images with %s=%d", + "Planarconfiguration", planarconfig); + return (0); + } + /* 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_OJPEG: + case COMPRESSION_JPEG: + TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB); + img->photometric = PHOTOMETRIC_RGB; + break; + default: + /* do nothing */; + break; + } + 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); } - 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); + 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) { + img->get = TIFFIsTiled(tif) ? gtTileContig : gtStripContig; + if (!pickTileContigCase(img)) { + sprintf(emsg, "Sorry, can not handle image"); + return 0; + } + } else { + img->get = TIFFIsTiled(tif) ? gtTileSeparate : gtStripSeparate; + if (!pickTileSeparateCase(img)) { + sprintf(emsg, "Sorry, can not handle image"); + 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) { - img->get = TIFFIsTiled(tif) ? gtTileContig : gtStripContig; - if (!pickTileContigCase(img)) { - sprintf(emsg, "Sorry, can not handle image"); - return 0; - } - } else { - img->get = TIFFIsTiled(tif) ? gtTileSeparate : gtStripSeparate; - if (!pickTileSeparateCase(img)) { - sprintf(emsg, "Sorry, can not handle image"); - return 0; - } - } - return 1; + return 1; } int