From c0b89ac5bfb90835ef01573267020e42d4fe070c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Sun, 23 Aug 2015 12:17:05 +0200 Subject: Imported Upstream version 1.8.0 --- jpeg/rdcolmap.c | 253 -------------------------------------------------------- 1 file changed, 253 deletions(-) delete mode 100644 jpeg/rdcolmap.c (limited to 'jpeg/rdcolmap.c') diff --git a/jpeg/rdcolmap.c b/jpeg/rdcolmap.c deleted file mode 100644 index 42b3437..0000000 --- a/jpeg/rdcolmap.c +++ /dev/null @@ -1,253 +0,0 @@ -/* - * rdcolmap.c - * - * Copyright (C) 1994-1996, Thomas G. Lane. - * This file is part of the Independent JPEG Group's software. - * For conditions of distribution and use, see the accompanying README file. - * - * This file implements djpeg's "-map file" switch. It reads a source image - * and constructs a colormap to be supplied to the JPEG decompressor. - * - * Currently, these file formats are supported for the map file: - * GIF: the contents of the GIF's global colormap are used. - * PPM (either text or raw flavor): the entire file is read and - * each unique pixel value is entered in the map. - * Note that reading a large PPM file will be horrendously slow. - * Typically, a PPM-format map file should contain just one pixel - * of each desired color. Such a file can be extracted from an - * ordinary image PPM file with ppmtomap(1). - * - * Rescaling a PPM that has a maxval unequal to MAXJSAMPLE is not - * currently implemented. - */ - -#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ - -#ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */ - -/* Portions of this code are based on the PBMPLUS library, which is: -** -** Copyright (C) 1988 by Jef Poskanzer. -** -** Permission to use, copy, modify, and distribute this software and its -** documentation for any purpose and without fee is hereby granted, provided -** that the above copyright notice appear in all copies and that both that -** copyright notice and this permission notice appear in supporting -** documentation. This software is provided "as is" without express or -** implied warranty. -*/ - - -/* - * Add a (potentially) new color to the color map. - */ - -LOCAL(void) -add_map_entry (j_decompress_ptr cinfo, int R, int G, int B) -{ - JSAMPROW colormap0 = cinfo->colormap[0]; - JSAMPROW colormap1 = cinfo->colormap[1]; - JSAMPROW colormap2 = cinfo->colormap[2]; - int ncolors = cinfo->actual_number_of_colors; - int index; - - /* Check for duplicate color. */ - for (index = 0; index < ncolors; index++) { - if (GETJSAMPLE(colormap0[index]) == R && - GETJSAMPLE(colormap1[index]) == G && - GETJSAMPLE(colormap2[index]) == B) - return; /* color is already in map */ - } - - /* Check for map overflow. */ - if (ncolors >= (MAXJSAMPLE+1)) - ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, (MAXJSAMPLE+1)); - - /* OK, add color to map. */ - colormap0[ncolors] = (JSAMPLE) R; - colormap1[ncolors] = (JSAMPLE) G; - colormap2[ncolors] = (JSAMPLE) B; - cinfo->actual_number_of_colors++; -} - - -/* - * Extract color map from a GIF file. - */ - -LOCAL(void) -read_gif_map (j_decompress_ptr cinfo, FILE * infile) -{ - int header[13]; - int i, colormaplen; - int R, G, B; - - /* Initial 'G' has already been read by read_color_map */ - /* Read the rest of the GIF header and logical screen descriptor */ - for (i = 1; i < 13; i++) { - if ((header[i] = getc(infile)) == EOF) - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - } - - /* Verify GIF Header */ - if (header[1] != 'I' || header[2] != 'F') - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - - /* There must be a global color map. */ - if ((header[10] & 0x80) == 0) - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - - /* OK, fetch it. */ - colormaplen = 2 << (header[10] & 0x07); - - for (i = 0; i < colormaplen; i++) { - R = getc(infile); - G = getc(infile); - B = getc(infile); - if (R == EOF || G == EOF || B == EOF) - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - add_map_entry(cinfo, - R << (BITS_IN_JSAMPLE-8), - G << (BITS_IN_JSAMPLE-8), - B << (BITS_IN_JSAMPLE-8)); - } -} - - -/* Support routines for reading PPM */ - - -LOCAL(int) -pbm_getc (FILE * infile) -/* Read next char, skipping over any comments */ -/* A comment/newline sequence is returned as a newline */ -{ - register int ch; - - ch = getc(infile); - if (ch == '#') { - do { - ch = getc(infile); - } while (ch != '\n' && ch != EOF); - } - return ch; -} - - -LOCAL(unsigned int) -read_pbm_integer (j_decompress_ptr cinfo, FILE * infile) -/* Read an unsigned decimal integer from the PPM file */ -/* Swallows one trailing character after the integer */ -/* Note that on a 16-bit-int machine, only values up to 64k can be read. */ -/* This should not be a problem in practice. */ -{ - register int ch; - register unsigned int val; - - /* Skip any leading whitespace */ - do { - ch = pbm_getc(infile); - if (ch == EOF) - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'); - - if (ch < '0' || ch > '9') - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - - val = ch - '0'; - while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') { - val *= 10; - val += ch - '0'; - } - return val; -} - - -/* - * Extract color map from a PPM file. - */ - -LOCAL(void) -read_ppm_map (j_decompress_ptr cinfo, FILE * infile) -{ - int c; - unsigned int w, h, maxval, row, col; - int R, G, B; - - /* Initial 'P' has already been read by read_color_map */ - c = getc(infile); /* save format discriminator for a sec */ - - /* while we fetch the remaining header info */ - w = read_pbm_integer(cinfo, infile); - h = read_pbm_integer(cinfo, infile); - maxval = read_pbm_integer(cinfo, infile); - - if (w <= 0 || h <= 0 || maxval <= 0) /* error check */ - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - - /* For now, we don't support rescaling from an unusual maxval. */ - if (maxval != (unsigned int) MAXJSAMPLE) - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - - switch (c) { - case '3': /* it's a text-format PPM file */ - for (row = 0; row < h; row++) { - for (col = 0; col < w; col++) { - R = read_pbm_integer(cinfo, infile); - G = read_pbm_integer(cinfo, infile); - B = read_pbm_integer(cinfo, infile); - add_map_entry(cinfo, R, G, B); - } - } - break; - - case '6': /* it's a raw-format PPM file */ - for (row = 0; row < h; row++) { - for (col = 0; col < w; col++) { - R = getc(infile); - G = getc(infile); - B = getc(infile); - if (R == EOF || G == EOF || B == EOF) - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - add_map_entry(cinfo, R, G, B); - } - } - break; - - default: - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - break; - } -} - - -/* - * Main entry point from djpeg.c. - * Input: opened input file (from file name argument on command line). - * Output: colormap and actual_number_of_colors fields are set in cinfo. - */ - -GLOBAL(void) -read_color_map (j_decompress_ptr cinfo, FILE * infile) -{ - /* Allocate space for a color map of maximum supported size. */ - cinfo->colormap = (*cinfo->mem->alloc_sarray) - ((j_common_ptr) cinfo, JPOOL_IMAGE, - (JDIMENSION) (MAXJSAMPLE+1), (JDIMENSION) 3); - cinfo->actual_number_of_colors = 0; /* initialize map to empty */ - - /* Read first byte to determine file format */ - switch (getc(infile)) { - case 'G': - read_gif_map(cinfo, infile); - break; - case 'P': - read_ppm_map(cinfo, infile); - break; - default: - ERREXIT(cinfo, JERR_BAD_CMAP_FILE); - break; - } -} - -#endif /* QUANT_2PASS_SUPPORTED */ -- cgit v1.2.3