/* * Get a strip-organized image that has * PlanarConfiguration contiguous if SamplesPerPixel > 1 * or * SamplesPerPixel == 1 */ boolean TIFFRasterImpl::gtStripContig( const RGBvalue* Map, u_long h, u_long w ) { u_char* buf = new u_char[TIFFStripSize(tif_)]; if (buf == nil) { TIFFError(TIFFFileName(tif_), "No space for strip buffer"); return (false); } tileContigRoutine put = pickTileContigCase(Map); u_long y = setorientation(h); int toskew = (int)(orientation_ == ORIENTATION_TOPLEFT ? -w + -w : -w + w); u_long rowsperstrip = (u_long) -1L; TIFFGetField(tif_, TIFFTAG_ROWSPERSTRIP, &rowsperstrip); u_long imagewidth; TIFFGetField(tif_, TIFFTAG_IMAGEWIDTH, &imagewidth); int scanline = TIFFScanlineSize(tif_); int fromskew = (int)(w < imagewidth ? imagewidth - w : 0); for (u_long row = 0; row < h; row += rowsperstrip) { u_int nrow = u_int(row + rowsperstrip > h ? h - row : rowsperstrip); if (TIFFReadEncodedStrip( tif_, TIFFComputeStrip(tif_, row, 0), buf, nrow*scanline) < 0 ) { break; } (this->*put)(raster_ + y*w, buf, Map, w, nrow, fromskew, toskew); y += (orientation_ == ORIENTATION_TOPLEFT ? -nrow : nrow); } delete buf; return true; }
/* * Get an tile-organized image that has * PlanarConfiguration contiguous if SamplesPerPixel > 1 * or * SamplesPerPixel == 1 */ boolean TIFFRasterImpl::gtTileContig(const RGBvalue* Map, u_long h, u_long w) { u_char* buf = new u_char[TIFFTileSize(tif_)]; if (buf == nil) { TIFFError(TIFFFileName(tif_), "No space for tile buffer"); return false; } tileContigRoutine put = pickTileContigCase(Map); u_long tw; TIFFGetField(tif_, TIFFTAG_TILEWIDTH, &tw); u_long th; TIFFGetField(tif_, TIFFTAG_TILELENGTH, &th); u_long y = setorientation(h); int toskew = (int)(orientation_ == ORIENTATION_TOPLEFT ? -tw+-w : -tw+w); for (u_long row = 0; row < h; row += th) { u_long nrow = (row + th > h ? h - row : th); for (u_long col = 0; col < w; col += tw) { if (TIFFReadTile(tif_, buf, col, row, 0, 0) < 0) { break; } if (col + tw > w) { /* * Tile is clipped horizontally. Calculate * visible portion and skewing factors. */ u_long npix = w - col; int fromskew = (int)(tw - npix); (this->*put)( raster_ + y*w + col, buf, Map, npix, nrow, fromskew, toskew + fromskew ); } else (this->*put)( raster_ + y*w + col, buf, Map, tw, nrow, 0, toskew ); } y += (orientation_ == ORIENTATION_TOPLEFT ? -nrow : nrow); } delete buf; return true; }
int TIFFRGBAImageBegin(TIFFRGBAImage* img, TIFF* tif, int stop, char emsg[1024]) { uint16* sampleinfo; uint16 extrasamples; uint16 planarconfig; int colorchannels; 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 image 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_ASSOCALPHA: /* data is pre-multiplied */ case EXTRASAMPLE_UNASSALPHA: /* data is not pre-multiplied */ img->alpha = sampleinfo[0]; break; } colorchannels = img->samplesperpixel - extrasamples; 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, &img->redcmap, &img->greencmap, &img->bluecmap)) { TIFFError(TIFFFileName(tif), "Missing required \"Colormap\" tag"); return (0); } /* fall thru... */ case PHOTOMETRIC_MINISWHITE: case PHOTOMETRIC_MINISBLACK: if (planarconfig == PLANARCONFIG_CONTIG && img->samplesperpixel != 1) { sprintf(emsg, "Sorry, can not handle contiguous data with %s=%d, and %s=%d", photoTag, img->photometric, "Samples/pixel", img->samplesperpixel); 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. */ { uint16 compress; TIFFGetField(tif, TIFFTAG_COMPRESSION, &compress); if (compress == COMPRESSION_JPEG && planarconfig == PLANARCONFIG_CONTIG) { /* can rely on libjpeg to convert to RGB */ /* XXX should restore current state on exit */ TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB); img->photometric = PHOTOMETRIC_RGB; } } 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; } 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; 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; (void) pickTileContigCase(img); } else { img->get = TIFFIsTiled(tif) ? gtTileSeparate : gtStripSeparate; (void) pickTileSeparateCase(img); } return (1); }