Shoaib Ahmed / Mbed 2 deprecated uzairkhan

Final 350 project

Dependencies:   uzair Camera_LS_Y201 F7_Ethernet LCD_DISCO_F746NG NetworkAPI SDFileSystem mbed

includes/rdcolmap.c@0:791a779d6220, 2017-07-31 (annotated)

Committer:
shoaib_ahmed
Date:
Mon Jul 31 09:16:35 2017 +0000
Revision:
0:791a779d6220
final project;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shoaib_ahmed 0:791a779d6220 1 /*
shoaib_ahmed 0:791a779d6220 2 * rdcolmap.c
shoaib_ahmed 0:791a779d6220 3 *
shoaib_ahmed 0:791a779d6220 4 * Copyright (C) 1994-1996, Thomas G. Lane.
shoaib_ahmed 0:791a779d6220 5 * This file is part of the Independent JPEG Group's software.
shoaib_ahmed 0:791a779d6220 6 * For conditions of distribution and use, see the accompanying README file.
shoaib_ahmed 0:791a779d6220 7 *
shoaib_ahmed 0:791a779d6220 8 * This file implements djpeg's "-map file" switch. It reads a source image
shoaib_ahmed 0:791a779d6220 9 * and constructs a colormap to be supplied to the JPEG decompressor.
shoaib_ahmed 0:791a779d6220 10 *
shoaib_ahmed 0:791a779d6220 11 * Currently, these file formats are supported for the map file:
shoaib_ahmed 0:791a779d6220 12 * GIF: the contents of the GIF's global colormap are used.
shoaib_ahmed 0:791a779d6220 13 * PPM (either text or raw flavor): the entire file is read and
shoaib_ahmed 0:791a779d6220 14 * each unique pixel value is entered in the map.
shoaib_ahmed 0:791a779d6220 15 * Note that reading a large PPM file will be horrendously slow.
shoaib_ahmed 0:791a779d6220 16 * Typically, a PPM-format map file should contain just one pixel
shoaib_ahmed 0:791a779d6220 17 * of each desired color. Such a file can be extracted from an
shoaib_ahmed 0:791a779d6220 18 * ordinary image PPM file with ppmtomap(1).
shoaib_ahmed 0:791a779d6220 19 *
shoaib_ahmed 0:791a779d6220 20 * Rescaling a PPM that has a maxval unequal to MAXJSAMPLE is not
shoaib_ahmed 0:791a779d6220 21 * currently implemented.
shoaib_ahmed 0:791a779d6220 22 */
shoaib_ahmed 0:791a779d6220 23
shoaib_ahmed 0:791a779d6220 24 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
shoaib_ahmed 0:791a779d6220 25
shoaib_ahmed 0:791a779d6220 26 #ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
shoaib_ahmed 0:791a779d6220 27
shoaib_ahmed 0:791a779d6220 28 /* Portions of this code are based on the PBMPLUS library, which is:
shoaib_ahmed 0:791a779d6220 29 **
shoaib_ahmed 0:791a779d6220 30 ** Copyright (C) 1988 by Jef Poskanzer.
shoaib_ahmed 0:791a779d6220 31 **
shoaib_ahmed 0:791a779d6220 32 ** Permission to use, copy, modify, and distribute this software and its
shoaib_ahmed 0:791a779d6220 33 ** documentation for any purpose and without fee is hereby granted, provided
shoaib_ahmed 0:791a779d6220 34 ** that the above copyright notice appear in all copies and that both that
shoaib_ahmed 0:791a779d6220 35 ** copyright notice and this permission notice appear in supporting
shoaib_ahmed 0:791a779d6220 36 ** documentation. This software is provided "as is" without express or
shoaib_ahmed 0:791a779d6220 37 ** implied warranty.
shoaib_ahmed 0:791a779d6220 38 */
shoaib_ahmed 0:791a779d6220 39
shoaib_ahmed 0:791a779d6220 40
shoaib_ahmed 0:791a779d6220 41 /*
shoaib_ahmed 0:791a779d6220 42 * Add a (potentially) new color to the color map.
shoaib_ahmed 0:791a779d6220 43 */
shoaib_ahmed 0:791a779d6220 44
shoaib_ahmed 0:791a779d6220 45 LOCAL(void)
shoaib_ahmed 0:791a779d6220 46 add_map_entry (j_decompress_ptr cinfo, int R, int G, int B)
shoaib_ahmed 0:791a779d6220 47 {
shoaib_ahmed 0:791a779d6220 48 JSAMPROW colormap0 = cinfo->colormap[0];
shoaib_ahmed 0:791a779d6220 49 JSAMPROW colormap1 = cinfo->colormap[1];
shoaib_ahmed 0:791a779d6220 50 JSAMPROW colormap2 = cinfo->colormap[2];
shoaib_ahmed 0:791a779d6220 51 int ncolors = cinfo->actual_number_of_colors;
shoaib_ahmed 0:791a779d6220 52 int index;
shoaib_ahmed 0:791a779d6220 53
shoaib_ahmed 0:791a779d6220 54 /* Check for duplicate color. */
shoaib_ahmed 0:791a779d6220 55 for (index = 0; index < ncolors; index++) {
shoaib_ahmed 0:791a779d6220 56 if (GETJSAMPLE(colormap0[index]) == R &&
shoaib_ahmed 0:791a779d6220 57 GETJSAMPLE(colormap1[index]) == G &&
shoaib_ahmed 0:791a779d6220 58 GETJSAMPLE(colormap2[index]) == B)
shoaib_ahmed 0:791a779d6220 59 return; /* color is already in map */
shoaib_ahmed 0:791a779d6220 60 }
shoaib_ahmed 0:791a779d6220 61
shoaib_ahmed 0:791a779d6220 62 /* Check for map overflow. */
shoaib_ahmed 0:791a779d6220 63 if (ncolors >= (MAXJSAMPLE+1))
shoaib_ahmed 0:791a779d6220 64 ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, (MAXJSAMPLE+1));
shoaib_ahmed 0:791a779d6220 65
shoaib_ahmed 0:791a779d6220 66 /* OK, add color to map. */
shoaib_ahmed 0:791a779d6220 67 colormap0[ncolors] = (JSAMPLE) R;
shoaib_ahmed 0:791a779d6220 68 colormap1[ncolors] = (JSAMPLE) G;
shoaib_ahmed 0:791a779d6220 69 colormap2[ncolors] = (JSAMPLE) B;
shoaib_ahmed 0:791a779d6220 70 cinfo->actual_number_of_colors++;
shoaib_ahmed 0:791a779d6220 71 }
shoaib_ahmed 0:791a779d6220 72
shoaib_ahmed 0:791a779d6220 73
shoaib_ahmed 0:791a779d6220 74 /*
shoaib_ahmed 0:791a779d6220 75 * Extract color map from a GIF file.
shoaib_ahmed 0:791a779d6220 76 */
shoaib_ahmed 0:791a779d6220 77
shoaib_ahmed 0:791a779d6220 78 LOCAL(void)
shoaib_ahmed 0:791a779d6220 79 read_gif_map (j_decompress_ptr cinfo, FILE * infile)
shoaib_ahmed 0:791a779d6220 80 {
shoaib_ahmed 0:791a779d6220 81 int header[13];
shoaib_ahmed 0:791a779d6220 82 int i, colormaplen;
shoaib_ahmed 0:791a779d6220 83 int R, G, B;
shoaib_ahmed 0:791a779d6220 84
shoaib_ahmed 0:791a779d6220 85 /* Initial 'G' has already been read by read_color_map */
shoaib_ahmed 0:791a779d6220 86 /* Read the rest of the GIF header and logical screen descriptor */
shoaib_ahmed 0:791a779d6220 87 for (i = 1; i < 13; i++) {
shoaib_ahmed 0:791a779d6220 88 if ((header[i] = getc(infile)) == EOF)
shoaib_ahmed 0:791a779d6220 89 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 90 }
shoaib_ahmed 0:791a779d6220 91
shoaib_ahmed 0:791a779d6220 92 /* Verify GIF Header */
shoaib_ahmed 0:791a779d6220 93 if (header[1] != 'I' || header[2] != 'F')
shoaib_ahmed 0:791a779d6220 94 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 95
shoaib_ahmed 0:791a779d6220 96 /* There must be a global color map. */
shoaib_ahmed 0:791a779d6220 97 if ((header[10] & 0x80) == 0)
shoaib_ahmed 0:791a779d6220 98 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 99
shoaib_ahmed 0:791a779d6220 100 /* OK, fetch it. */
shoaib_ahmed 0:791a779d6220 101 colormaplen = 2 << (header[10] & 0x07);
shoaib_ahmed 0:791a779d6220 102
shoaib_ahmed 0:791a779d6220 103 for (i = 0; i < colormaplen; i++) {
shoaib_ahmed 0:791a779d6220 104 R = getc(infile);
shoaib_ahmed 0:791a779d6220 105 G = getc(infile);
shoaib_ahmed 0:791a779d6220 106 B = getc(infile);
shoaib_ahmed 0:791a779d6220 107 if (R == EOF || G == EOF || B == EOF)
shoaib_ahmed 0:791a779d6220 108 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 109 add_map_entry(cinfo,
shoaib_ahmed 0:791a779d6220 110 R << (BITS_IN_JSAMPLE-8),
shoaib_ahmed 0:791a779d6220 111 G << (BITS_IN_JSAMPLE-8),
shoaib_ahmed 0:791a779d6220 112 B << (BITS_IN_JSAMPLE-8));
shoaib_ahmed 0:791a779d6220 113 }
shoaib_ahmed 0:791a779d6220 114 }
shoaib_ahmed 0:791a779d6220 115
shoaib_ahmed 0:791a779d6220 116
shoaib_ahmed 0:791a779d6220 117 /* Support routines for reading PPM */
shoaib_ahmed 0:791a779d6220 118
shoaib_ahmed 0:791a779d6220 119
shoaib_ahmed 0:791a779d6220 120 LOCAL(int)
shoaib_ahmed 0:791a779d6220 121 pbm_getc (FILE * infile)
shoaib_ahmed 0:791a779d6220 122 /* Read next char, skipping over any comments */
shoaib_ahmed 0:791a779d6220 123 /* A comment/newline sequence is returned as a newline */
shoaib_ahmed 0:791a779d6220 124 {
shoaib_ahmed 0:791a779d6220 125 register int ch;
shoaib_ahmed 0:791a779d6220 126
shoaib_ahmed 0:791a779d6220 127 ch = getc(infile);
shoaib_ahmed 0:791a779d6220 128 if (ch == '#') {
shoaib_ahmed 0:791a779d6220 129 do {
shoaib_ahmed 0:791a779d6220 130 ch = getc(infile);
shoaib_ahmed 0:791a779d6220 131 } while (ch != '\n' && ch != EOF);
shoaib_ahmed 0:791a779d6220 132 }
shoaib_ahmed 0:791a779d6220 133 return ch;
shoaib_ahmed 0:791a779d6220 134 }
shoaib_ahmed 0:791a779d6220 135
shoaib_ahmed 0:791a779d6220 136
shoaib_ahmed 0:791a779d6220 137 LOCAL(unsigned int)
shoaib_ahmed 0:791a779d6220 138 read_pbm_integer (j_decompress_ptr cinfo, FILE * infile)
shoaib_ahmed 0:791a779d6220 139 /* Read an unsigned decimal integer from the PPM file */
shoaib_ahmed 0:791a779d6220 140 /* Swallows one trailing character after the integer */
shoaib_ahmed 0:791a779d6220 141 /* Note that on a 16-bit-int machine, only values up to 64k can be read. */
shoaib_ahmed 0:791a779d6220 142 /* This should not be a problem in practice. */
shoaib_ahmed 0:791a779d6220 143 {
shoaib_ahmed 0:791a779d6220 144 register int ch;
shoaib_ahmed 0:791a779d6220 145 register unsigned int val;
shoaib_ahmed 0:791a779d6220 146
shoaib_ahmed 0:791a779d6220 147 /* Skip any leading whitespace */
shoaib_ahmed 0:791a779d6220 148 do {
shoaib_ahmed 0:791a779d6220 149 ch = pbm_getc(infile);
shoaib_ahmed 0:791a779d6220 150 if (ch == EOF)
shoaib_ahmed 0:791a779d6220 151 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 152 } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r');
shoaib_ahmed 0:791a779d6220 153
shoaib_ahmed 0:791a779d6220 154 if (ch < '0' || ch > '9')
shoaib_ahmed 0:791a779d6220 155 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 156
shoaib_ahmed 0:791a779d6220 157 val = ch - '0';
shoaib_ahmed 0:791a779d6220 158 while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') {
shoaib_ahmed 0:791a779d6220 159 val *= 10;
shoaib_ahmed 0:791a779d6220 160 val += ch - '0';
shoaib_ahmed 0:791a779d6220 161 }
shoaib_ahmed 0:791a779d6220 162 return val;
shoaib_ahmed 0:791a779d6220 163 }
shoaib_ahmed 0:791a779d6220 164
shoaib_ahmed 0:791a779d6220 165
shoaib_ahmed 0:791a779d6220 166 /*
shoaib_ahmed 0:791a779d6220 167 * Extract color map from a PPM file.
shoaib_ahmed 0:791a779d6220 168 */
shoaib_ahmed 0:791a779d6220 169
shoaib_ahmed 0:791a779d6220 170 LOCAL(void)
shoaib_ahmed 0:791a779d6220 171 read_ppm_map (j_decompress_ptr cinfo, FILE * infile)
shoaib_ahmed 0:791a779d6220 172 {
shoaib_ahmed 0:791a779d6220 173 int c;
shoaib_ahmed 0:791a779d6220 174 unsigned int w, h, maxval, row, col;
shoaib_ahmed 0:791a779d6220 175 int R, G, B;
shoaib_ahmed 0:791a779d6220 176
shoaib_ahmed 0:791a779d6220 177 /* Initial 'P' has already been read by read_color_map */
shoaib_ahmed 0:791a779d6220 178 c = getc(infile); /* save format discriminator for a sec */
shoaib_ahmed 0:791a779d6220 179
shoaib_ahmed 0:791a779d6220 180 /* while we fetch the remaining header info */
shoaib_ahmed 0:791a779d6220 181 w = read_pbm_integer(cinfo, infile);
shoaib_ahmed 0:791a779d6220 182 h = read_pbm_integer(cinfo, infile);
shoaib_ahmed 0:791a779d6220 183 maxval = read_pbm_integer(cinfo, infile);
shoaib_ahmed 0:791a779d6220 184
shoaib_ahmed 0:791a779d6220 185 if (w <= 0 || h <= 0 || maxval <= 0) /* error check */
shoaib_ahmed 0:791a779d6220 186 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 187
shoaib_ahmed 0:791a779d6220 188 /* For now, we don't support rescaling from an unusual maxval. */
shoaib_ahmed 0:791a779d6220 189 if (maxval != (unsigned int) MAXJSAMPLE)
shoaib_ahmed 0:791a779d6220 190 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 191
shoaib_ahmed 0:791a779d6220 192 switch (c) {
shoaib_ahmed 0:791a779d6220 193 case '3': /* it's a text-format PPM file */
shoaib_ahmed 0:791a779d6220 194 for (row = 0; row < h; row++) {
shoaib_ahmed 0:791a779d6220 195 for (col = 0; col < w; col++) {
shoaib_ahmed 0:791a779d6220 196 R = read_pbm_integer(cinfo, infile);
shoaib_ahmed 0:791a779d6220 197 G = read_pbm_integer(cinfo, infile);
shoaib_ahmed 0:791a779d6220 198 B = read_pbm_integer(cinfo, infile);
shoaib_ahmed 0:791a779d6220 199 add_map_entry(cinfo, R, G, B);
shoaib_ahmed 0:791a779d6220 200 }
shoaib_ahmed 0:791a779d6220 201 }
shoaib_ahmed 0:791a779d6220 202 break;
shoaib_ahmed 0:791a779d6220 203
shoaib_ahmed 0:791a779d6220 204 case '6': /* it's a raw-format PPM file */
shoaib_ahmed 0:791a779d6220 205 for (row = 0; row < h; row++) {
shoaib_ahmed 0:791a779d6220 206 for (col = 0; col < w; col++) {
shoaib_ahmed 0:791a779d6220 207 R = getc(infile);
shoaib_ahmed 0:791a779d6220 208 G = getc(infile);
shoaib_ahmed 0:791a779d6220 209 B = getc(infile);
shoaib_ahmed 0:791a779d6220 210 if (R == EOF || G == EOF || B == EOF)
shoaib_ahmed 0:791a779d6220 211 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 212 add_map_entry(cinfo, R, G, B);
shoaib_ahmed 0:791a779d6220 213 }
shoaib_ahmed 0:791a779d6220 214 }
shoaib_ahmed 0:791a779d6220 215 break;
shoaib_ahmed 0:791a779d6220 216
shoaib_ahmed 0:791a779d6220 217 default:
shoaib_ahmed 0:791a779d6220 218 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 219 break;
shoaib_ahmed 0:791a779d6220 220 }
shoaib_ahmed 0:791a779d6220 221 }
shoaib_ahmed 0:791a779d6220 222
shoaib_ahmed 0:791a779d6220 223
shoaib_ahmed 0:791a779d6220 224 /*
shoaib_ahmed 0:791a779d6220 225 * Main entry point from djpeg.c.
shoaib_ahmed 0:791a779d6220 226 * Input: opened input file (from file name argument on command line).
shoaib_ahmed 0:791a779d6220 227 * Output: colormap and actual_number_of_colors fields are set in cinfo.
shoaib_ahmed 0:791a779d6220 228 */
shoaib_ahmed 0:791a779d6220 229
shoaib_ahmed 0:791a779d6220 230 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 231 read_color_map (j_decompress_ptr cinfo, FILE * infile)
shoaib_ahmed 0:791a779d6220 232 {
shoaib_ahmed 0:791a779d6220 233 /* Allocate space for a color map of maximum supported size. */
shoaib_ahmed 0:791a779d6220 234 cinfo->colormap = (*cinfo->mem->alloc_sarray)
shoaib_ahmed 0:791a779d6220 235 ((j_common_ptr) cinfo, JPOOL_IMAGE,
shoaib_ahmed 0:791a779d6220 236 (JDIMENSION) (MAXJSAMPLE+1), (JDIMENSION) 3);
shoaib_ahmed 0:791a779d6220 237 cinfo->actual_number_of_colors = 0; /* initialize map to empty */
shoaib_ahmed 0:791a779d6220 238
shoaib_ahmed 0:791a779d6220 239 /* Read first byte to determine file format */
shoaib_ahmed 0:791a779d6220 240 switch (getc(infile)) {
shoaib_ahmed 0:791a779d6220 241 case 'G':
shoaib_ahmed 0:791a779d6220 242 read_gif_map(cinfo, infile);
shoaib_ahmed 0:791a779d6220 243 break;
shoaib_ahmed 0:791a779d6220 244 case 'P':
shoaib_ahmed 0:791a779d6220 245 read_ppm_map(cinfo, infile);
shoaib_ahmed 0:791a779d6220 246 break;
shoaib_ahmed 0:791a779d6220 247 default:
shoaib_ahmed 0:791a779d6220 248 ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
shoaib_ahmed 0:791a779d6220 249 break;
shoaib_ahmed 0:791a779d6220 250 }
shoaib_ahmed 0:791a779d6220 251 }
shoaib_ahmed 0:791a779d6220 252
shoaib_ahmed 0:791a779d6220 253 #endif /* QUANT_2PASS_SUPPORTED */