diff options
Diffstat (limited to 'converter/other')
-rw-r--r-- | converter/other/tifftopnm.c | 242 |
1 files changed, 125 insertions, 117 deletions
diff --git a/converter/other/tifftopnm.c b/converter/other/tifftopnm.c index 416ea9c3..e72aff5e 100644 --- a/converter/other/tifftopnm.c +++ b/converter/other/tifftopnm.c @@ -577,7 +577,7 @@ computeFillorder(unsigned short const fillorderTag, static void -analyzeImageType(TIFF * const tif, +analyzeImageType(TIFF * const tiffP, unsigned short const bps, unsigned short const spp, unsigned short const photomet, @@ -586,141 +586,147 @@ analyzeImageType(TIFF * const tif, xel * const colormap, bool const headerdump, struct CmdlineInfo const cmdline) { +/*---------------------------------------------------------------------------- + Determine from the TIFF header in *tif certain properties of the image + as well as the proper format of PNM image for the conversion. - bool grayscale; - - if (bps == 1 && spp == 1) { - if (cmdline.headerdump) - pm_message("bilevel"); - grayscale = TRUE; - *maxvalP = 1; - } else { - /* How come we don't deal with the photometric for the monochrome - case (make sure it's one we know)? -Bryan 00.03.04 - */ - switch (photomet) { - case PHOTOMETRIC_MINISBLACK: - case PHOTOMETRIC_MINISWHITE: - if (spp != 1) - pm_error("This grayscale image has %d samples per pixel. " - "We understand only 1.", spp); - grayscale = TRUE; - *maxvalP = pm_bitstomaxval(MIN(bps,16)); - if (headerdump) - pm_message("grayscale image, (min=%s) output maxval %u ", - photomet == PHOTOMETRIC_MINISBLACK ? - "black" : "white", - *maxvalP - ); - break; + *formatP and *maxvalP are the basic PNM parameters. +-----------------------------------------------------------------------------*/ + switch (photomet) { + case PHOTOMETRIC_MINISBLACK: + case PHOTOMETRIC_MINISWHITE: + if (spp != 1) + pm_error("This grayscale image has %d samples per pixel. " + "We understand only 1.", spp); + + *formatP = bps == 1 ? PBM_TYPE : PGM_TYPE; + + *maxvalP = pm_bitstomaxval(MIN(bps, 16)); + + if (headerdump) + pm_message("grayscale image, (min=%s) output maxval %u ", + photomet == PHOTOMETRIC_MINISBLACK ? + "black" : "white", + *maxvalP + ); + break; - case PHOTOMETRIC_PALETTE: { - int fldPresent; - int i; - int numcolors; - unsigned short* redcolormap; - unsigned short* greencolormap; - unsigned short* bluecolormap; - - if (headerdump) - pm_message("colormapped"); - - if (spp != 1) - pm_error("This paletted image has %d samples per pixel. " - "We understand only 1.", spp); - - fldPresent = TIFFGetField( - tif, TIFFTAG_COLORMAP, - &redcolormap, &greencolormap, &bluecolormap); - - if (!fldPresent) - pm_error("error getting colormaps"); - - numcolors = 1 << bps; - if (numcolors > MAXCOLORS) - pm_error("too many colors"); - *maxvalP = PNM_MAXMAXVAL; - grayscale = FALSE; - for (i = 0; i < numcolors; ++i) { - xelval r, g, b; - r = (long) redcolormap[i] * PNM_MAXMAXVAL / 65535L; - g = (long) greencolormap[i] * PNM_MAXMAXVAL / 65535L; - b = (long) bluecolormap[i] * PNM_MAXMAXVAL / 65535L; - PPM_ASSIGN(colormap[i], r, g, b); - } + case PHOTOMETRIC_PALETTE: { + int fldPresent; + int i; + int numcolors; + unsigned short* redcolormap; + unsigned short* greencolormap; + unsigned short* bluecolormap; + + if (headerdump) + pm_message("colormapped"); + + if (spp != 1) + pm_error("This paletted image has %d samples per pixel. " + "We understand only 1.", spp); + + fldPresent = TIFFGetField( + tiffP, TIFFTAG_COLORMAP, + &redcolormap, &greencolormap, &bluecolormap); + + if (!fldPresent) + pm_error("error getting colormaps"); + + numcolors = 1 << bps; + if (numcolors > MAXCOLORS) + pm_error("too many colors"); + + *formatP = PPM_TYPE; + + *maxvalP = PNM_MAXMAXVAL; + + for (i = 0; i < numcolors; ++i) { + xelval r, g, b; + r = (long) redcolormap[i] * PNM_MAXMAXVAL / 65535L; + g = (long) greencolormap[i] * PNM_MAXMAXVAL / 65535L; + b = (long) bluecolormap[i] * PNM_MAXMAXVAL / 65535L; + PPM_ASSIGN(colormap[i], r, g, b); } + } break; - case PHOTOMETRIC_SEPARATED: { - unsigned short inkset; - int fldPresent; - - if (headerdump) - pm_message("color separation"); - - fldPresent = TIFFGetField(tif, TIFFTAG_INKNAMES, &inkset); - if (fldPresent && inkset != INKSET_CMYK) - pm_error("This color separation file uses an inkset (%d) " - "we can't handle. We handle only CMYK.", inkset); - if (spp != 4) - pm_error("This CMYK color separation file is %d samples per " - "pixel. " - "We need 4 samples, though: C, M, Y, and K. ", - spp); - grayscale = FALSE; - *maxvalP = (1 << bps) - 1; - } + case PHOTOMETRIC_SEPARATED: { + unsigned short inkset; + int fldPresent; + + if (headerdump) + pm_message("color separation"); + + fldPresent = TIFFGetField(tiffP, TIFFTAG_INKNAMES, &inkset); + if (fldPresent && inkset != INKSET_CMYK) + pm_error("This color separation file uses an inkset (%d) " + "we can't handle. We handle only CMYK.", inkset); + if (spp != 4) + pm_error("This CMYK color separation file is %d samples per " + "pixel. " + "We need 4 samples, though: C, M, Y, and K. ", + spp); + + *formatP = PPM_TYPE; + + *maxvalP = (1 << bps) - 1; + } break; - case PHOTOMETRIC_RGB: - if (headerdump) - pm_message("RGB truecolor"); - grayscale = FALSE; + case PHOTOMETRIC_RGB: + if (headerdump) + pm_message("RGB truecolor"); - if (spp != 3 && spp != 4) - pm_error("This RGB image has %d samples per pixel. " - "We understand only 3 or 4.", spp); + if (spp != 3 && spp != 4) + pm_error("This RGB image has %d samples per pixel. " + "We understand only 3 or 4.", spp); - *maxvalP = (1 << bps) - 1; - break; + *formatP = PPM_TYPE; - case PHOTOMETRIC_MASK: - pm_error("don't know how to handle PHOTOMETRIC_MASK"); + *maxvalP = (1 << bps) - 1; + break; + + case PHOTOMETRIC_MASK: + pm_error("don't know how to handle PHOTOMETRIC_MASK"); - case PHOTOMETRIC_DEPTH: - pm_error("don't know how to handle PHOTOMETRIC_DEPTH"); + case PHOTOMETRIC_DEPTH: + pm_error("don't know how to handle PHOTOMETRIC_DEPTH"); - case PHOTOMETRIC_YCBCR: - pm_error("don't know how to handle PHOTOMETRIC_YCBCR"); + case PHOTOMETRIC_YCBCR: + pm_error("don't know how to handle PHOTOMETRIC_YCBCR"); - case PHOTOMETRIC_CIELAB: - pm_error("don't know how to handle PHOTOMETRIC_CIELAB"); + case PHOTOMETRIC_CIELAB: + pm_error("don't know how to handle PHOTOMETRIC_CIELAB"); - case PHOTOMETRIC_LOGL: - pm_error("don't know how to handle PHOTOMETRIC_LOGL"); + case PHOTOMETRIC_LOGL: + pm_error("don't know how to handle PHOTOMETRIC_LOGL"); - case PHOTOMETRIC_LOGLUV: - pm_error("don't know how to handle PHOTOMETRIC_LOGLUV"); + case PHOTOMETRIC_LOGLUV: + pm_error("don't know how to handle PHOTOMETRIC_LOGLUV"); - default: - pm_error("unknown photometric: %d", photomet); - } + default: + pm_error("unknown photometric: %d", photomet); } if (*maxvalP > PNM_OVERALLMAXVAL) - pm_error("bits/sample (%d) in the input image is too large.", - bps); - if (grayscale) { - if (*maxvalP == 1) { - *formatP = PBM_TYPE; - pm_message("writing PBM file"); - } else { - *formatP = PGM_TYPE; - pm_message("writing PGM file"); - } - } else { - *formatP = PPM_TYPE; - pm_message("writing PPM file"); + pm_error("bits/sample (%u) in the input image is too large.", bps); +} + + + +static void +reportOutputFormat(int const format) { + + const char * formatDesc; + + switch (format) { + case PBM_TYPE: formatDesc = "PBM"; break; + case PGM_TYPE: formatDesc = "PGM"; break; + case PPM_TYPE: formatDesc = "PPM"; break; + default: assert(false); } + + pm_message("writing %s file", formatDesc); } @@ -1678,6 +1684,8 @@ convertImage(TIFF * const tifP, analyzeImageType(tifP, tiffDir.bps, tiffDir.spp, tiffDir.photomet, &maxval, &format, colormap, cmdline.headerdump, cmdline); + reportOutputFormat(format); + pnmOut_init(imageoutFileP, alphaFileP, tiffDir.width, tiffDir.height, tiffDir.orientation, maxval, format, maxval, cmdline.byrow, cmdline.orientraw, |