Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * rdppm.c |
| 3 | * |
DRC | 5033f3e | 2014-05-18 18:33:44 +0000 | [diff] [blame] | 4 | * This file was part of the Independent JPEG Group's software: |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 5 | * Copyright (C) 1991-1997, Thomas G. Lane. |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 6 | * Modified 2009 by Bill Allombert, Guido Vollbeding. |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 7 | * libjpeg-turbo Modifications: |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 8 | * Copyright (C) 2015-2017, D. R. Commander. |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 9 | * For conditions of distribution and use, see the accompanying README.ijg |
| 10 | * file. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 11 | * |
| 12 | * This file contains routines to read input images in PPM/PGM format. |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 13 | * The extended 2-byte-per-sample raw PPM/PGM formats are supported. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 14 | * The PBMPLUS library is NOT required to compile this software |
| 15 | * (but it is highly useful as a set of PPM image manipulation programs). |
| 16 | * |
| 17 | * These routines may need modification for non-Unix environments or |
| 18 | * specialized applications. As they stand, they assume input from |
| 19 | * an ordinary stdio stream. They further assume that reading begins |
| 20 | * at the start of the file; start_input may need work if the |
| 21 | * user interface has already read some data (e.g., to determine that |
| 22 | * the file is indeed PPM format). |
| 23 | */ |
| 24 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 25 | #include "cmyk.h" |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 26 | #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 27 | |
| 28 | #ifdef PPM_SUPPORTED |
| 29 | |
| 30 | |
| 31 | /* Portions of this code are based on the PBMPLUS library, which is: |
| 32 | ** |
| 33 | ** Copyright (C) 1988 by Jef Poskanzer. |
| 34 | ** |
| 35 | ** Permission to use, copy, modify, and distribute this software and its |
| 36 | ** documentation for any purpose and without fee is hereby granted, provided |
| 37 | ** that the above copyright notice appear in all copies and that both that |
| 38 | ** copyright notice and this permission notice appear in supporting |
| 39 | ** documentation. This software is provided "as is" without express or |
| 40 | ** implied warranty. |
| 41 | */ |
| 42 | |
| 43 | |
| 44 | /* Macros to deal with unsigned chars as efficiently as compiler allows */ |
| 45 | |
| 46 | #ifdef HAVE_UNSIGNED_CHAR |
| 47 | typedef unsigned char U_CHAR; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 48 | #define UCH(x) ((int)(x)) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 49 | #else /* !HAVE_UNSIGNED_CHAR */ |
DRC | 61976bd | 2014-04-20 19:13:10 +0000 | [diff] [blame] | 50 | #ifdef __CHAR_UNSIGNED__ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 51 | typedef char U_CHAR; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 52 | #define UCH(x) ((int)(x)) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 53 | #else |
| 54 | typedef char U_CHAR; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 55 | #define UCH(x) ((int)(x) & 0xFF) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 56 | #endif |
| 57 | #endif /* HAVE_UNSIGNED_CHAR */ |
| 58 | |
| 59 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 60 | #define ReadOK(file, buffer, len) \ |
| 61 | (JFREAD(file, buffer, len) == ((size_t)(len))) |
| 62 | |
| 63 | static int alpha_index[JPEG_NUMCS] = { |
| 64 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3, 3, 0, 0, -1 |
| 65 | }; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 66 | |
| 67 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 68 | /* Private version of data source object */ |
| 69 | |
| 70 | typedef struct { |
| 71 | struct cjpeg_source_struct pub; /* public fields */ |
| 72 | |
DRC | 5033f3e | 2014-05-18 18:33:44 +0000 | [diff] [blame] | 73 | /* Usually these two pointers point to the same place: */ |
| 74 | U_CHAR *iobuffer; /* fread's I/O buffer */ |
| 75 | JSAMPROW pixrow; /* compressor input buffer */ |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 76 | size_t buffer_width; /* width of I/O buffer */ |
| 77 | JSAMPLE *rescale; /* => maxval-remapping array, or NULL */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 78 | unsigned int maxval; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 79 | } ppm_source_struct; |
| 80 | |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 81 | typedef ppm_source_struct *ppm_source_ptr; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 82 | |
| 83 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 84 | LOCAL(int) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 85 | pbm_getc(FILE *infile) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 86 | /* Read next char, skipping over any comments */ |
| 87 | /* A comment/newline sequence is returned as a newline */ |
| 88 | { |
| 89 | register int ch; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 90 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 91 | ch = getc(infile); |
| 92 | if (ch == '#') { |
| 93 | do { |
| 94 | ch = getc(infile); |
| 95 | } while (ch != '\n' && ch != EOF); |
| 96 | } |
| 97 | return ch; |
| 98 | } |
| 99 | |
| 100 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 101 | LOCAL(unsigned int) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 102 | read_pbm_integer(j_compress_ptr cinfo, FILE *infile, unsigned int maxval) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 103 | /* Read an unsigned decimal integer from the PPM file */ |
| 104 | /* Swallows one trailing character after the integer */ |
| 105 | /* Note that on a 16-bit-int machine, only values up to 64k can be read. */ |
| 106 | /* This should not be a problem in practice. */ |
| 107 | { |
| 108 | register int ch; |
| 109 | register unsigned int val; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 110 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 111 | /* Skip any leading whitespace */ |
| 112 | do { |
| 113 | ch = pbm_getc(infile); |
| 114 | if (ch == EOF) |
| 115 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 116 | } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 117 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 118 | if (ch < '0' || ch > '9') |
| 119 | ERREXIT(cinfo, JERR_PPM_NONNUMERIC); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 120 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 121 | val = ch - '0'; |
| 122 | while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') { |
| 123 | val *= 10; |
| 124 | val += ch - '0'; |
| 125 | } |
Frank Bossen | 6709e4a | 2014-12-29 19:42:20 +0100 | [diff] [blame] | 126 | |
| 127 | if (val > maxval) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 128 | ERREXIT(cinfo, JERR_PPM_OUTOFRANGE); |
Frank Bossen | 6709e4a | 2014-12-29 19:42:20 +0100 | [diff] [blame] | 129 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 130 | return val; |
| 131 | } |
| 132 | |
| 133 | |
| 134 | /* |
| 135 | * Read one row of pixels. |
| 136 | * |
| 137 | * We provide several different versions depending on input file format. |
| 138 | * In all cases, input is scaled to the size of JSAMPLE. |
| 139 | * |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 140 | * A really fast path is provided for reading byte/sample raw files with |
| 141 | * maxval = MAXJSAMPLE, which is the normal case for 8-bit data. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 142 | */ |
| 143 | |
| 144 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 145 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 146 | get_text_gray_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 147 | /* This version is for reading text-format PGM files with any maxval */ |
| 148 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 149 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 150 | FILE *infile = source->pub.input_file; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 151 | register JSAMPROW ptr; |
| 152 | register JSAMPLE *rescale = source->rescale; |
| 153 | JDIMENSION col; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 154 | unsigned int maxval = source->maxval; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 155 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 156 | ptr = source->pub.buffer[0]; |
| 157 | for (col = cinfo->image_width; col > 0; col--) { |
Frank Bossen | 6709e4a | 2014-12-29 19:42:20 +0100 | [diff] [blame] | 158 | *ptr++ = rescale[read_pbm_integer(cinfo, infile, maxval)]; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 159 | } |
| 160 | return 1; |
| 161 | } |
| 162 | |
| 163 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 164 | #define GRAY_RGB_READ_LOOP(read_op, alpha_set_op) { \ |
| 165 | for (col = cinfo->image_width; col > 0; col--) { \ |
| 166 | ptr[rindex] = ptr[gindex] = ptr[bindex] = read_op; \ |
| 167 | alpha_set_op \ |
| 168 | ptr += ps; \ |
| 169 | } \ |
| 170 | } |
| 171 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 172 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 173 | get_text_gray_rgb_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
| 174 | /* This version is for reading text-format PGM files with any maxval and |
| 175 | converting to extended RGB */ |
| 176 | { |
| 177 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
| 178 | FILE *infile = source->pub.input_file; |
| 179 | register JSAMPROW ptr; |
| 180 | register JSAMPLE *rescale = source->rescale; |
| 181 | JDIMENSION col; |
| 182 | unsigned int maxval = source->maxval; |
| 183 | register int rindex = rgb_red[cinfo->in_color_space]; |
| 184 | register int gindex = rgb_green[cinfo->in_color_space]; |
| 185 | register int bindex = rgb_blue[cinfo->in_color_space]; |
| 186 | register int aindex = alpha_index[cinfo->in_color_space]; |
| 187 | register int ps = rgb_pixelsize[cinfo->in_color_space]; |
| 188 | |
| 189 | ptr = source->pub.buffer[0]; |
| 190 | if (maxval == MAXJSAMPLE) { |
| 191 | if (aindex >= 0) |
| 192 | GRAY_RGB_READ_LOOP(read_pbm_integer(cinfo, infile, maxval), |
| 193 | ptr[aindex] = 0xFF;) |
| 194 | else |
| 195 | GRAY_RGB_READ_LOOP(read_pbm_integer(cinfo, infile, maxval),) |
| 196 | } else { |
| 197 | if (aindex >= 0) |
| 198 | GRAY_RGB_READ_LOOP(rescale[read_pbm_integer(cinfo, infile, maxval)], |
| 199 | ptr[aindex] = 0xFF;) |
| 200 | else |
| 201 | GRAY_RGB_READ_LOOP(rescale[read_pbm_integer(cinfo, infile, maxval)],) |
| 202 | } |
| 203 | return 1; |
| 204 | } |
| 205 | |
| 206 | |
| 207 | METHODDEF(JDIMENSION) |
| 208 | get_text_gray_cmyk_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
| 209 | /* This version is for reading text-format PGM files with any maxval and |
| 210 | converting to CMYK */ |
| 211 | { |
| 212 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
| 213 | FILE *infile = source->pub.input_file; |
| 214 | register JSAMPROW ptr; |
| 215 | register JSAMPLE *rescale = source->rescale; |
| 216 | JDIMENSION col; |
| 217 | unsigned int maxval = source->maxval; |
| 218 | |
| 219 | ptr = source->pub.buffer[0]; |
| 220 | if (maxval == MAXJSAMPLE) { |
| 221 | for (col = cinfo->image_width; col > 0; col--) { |
| 222 | JSAMPLE gray = read_pbm_integer(cinfo, infile, maxval); |
| 223 | rgb_to_cmyk(gray, gray, gray, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 224 | ptr += 4; |
| 225 | } |
| 226 | } else { |
| 227 | for (col = cinfo->image_width; col > 0; col--) { |
| 228 | JSAMPLE gray = rescale[read_pbm_integer(cinfo, infile, maxval)]; |
| 229 | rgb_to_cmyk(gray, gray, gray, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 230 | ptr += 4; |
| 231 | } |
| 232 | } |
| 233 | return 1; |
| 234 | } |
| 235 | |
| 236 | |
| 237 | #define RGB_READ_LOOP(read_op, alpha_set_op) { \ |
| 238 | for (col = cinfo->image_width; col > 0; col--) { \ |
| 239 | ptr[rindex] = read_op; \ |
| 240 | ptr[gindex] = read_op; \ |
| 241 | ptr[bindex] = read_op; \ |
| 242 | alpha_set_op \ |
| 243 | ptr += ps; \ |
| 244 | } \ |
| 245 | } |
| 246 | |
| 247 | METHODDEF(JDIMENSION) |
| 248 | get_text_rgb_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 249 | /* This version is for reading text-format PPM files with any maxval */ |
| 250 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 251 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
| 252 | FILE *infile = source->pub.input_file; |
| 253 | register JSAMPROW ptr; |
| 254 | register JSAMPLE *rescale = source->rescale; |
| 255 | JDIMENSION col; |
| 256 | unsigned int maxval = source->maxval; |
| 257 | register int rindex = rgb_red[cinfo->in_color_space]; |
| 258 | register int gindex = rgb_green[cinfo->in_color_space]; |
| 259 | register int bindex = rgb_blue[cinfo->in_color_space]; |
| 260 | register int aindex = alpha_index[cinfo->in_color_space]; |
| 261 | register int ps = rgb_pixelsize[cinfo->in_color_space]; |
| 262 | |
| 263 | ptr = source->pub.buffer[0]; |
| 264 | if (maxval == MAXJSAMPLE) { |
| 265 | if (aindex >= 0) |
| 266 | RGB_READ_LOOP(read_pbm_integer(cinfo, infile, maxval), |
| 267 | ptr[aindex] = 0xFF;) |
| 268 | else |
| 269 | RGB_READ_LOOP(read_pbm_integer(cinfo, infile, maxval),) |
| 270 | } else { |
| 271 | if (aindex >= 0) |
| 272 | RGB_READ_LOOP(rescale[read_pbm_integer(cinfo, infile, maxval)], |
| 273 | ptr[aindex] = 0xFF;) |
| 274 | else |
| 275 | RGB_READ_LOOP(rescale[read_pbm_integer(cinfo, infile, maxval)],) |
| 276 | } |
| 277 | return 1; |
| 278 | } |
| 279 | |
| 280 | |
| 281 | METHODDEF(JDIMENSION) |
| 282 | get_text_rgb_cmyk_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
| 283 | /* This version is for reading text-format PPM files with any maxval and |
| 284 | converting to CMYK */ |
| 285 | { |
| 286 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 287 | FILE *infile = source->pub.input_file; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 288 | register JSAMPROW ptr; |
| 289 | register JSAMPLE *rescale = source->rescale; |
| 290 | JDIMENSION col; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 291 | unsigned int maxval = source->maxval; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 292 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 293 | ptr = source->pub.buffer[0]; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 294 | if (maxval == MAXJSAMPLE) { |
| 295 | for (col = cinfo->image_width; col > 0; col--) { |
| 296 | JSAMPLE r = read_pbm_integer(cinfo, infile, maxval); |
| 297 | JSAMPLE g = read_pbm_integer(cinfo, infile, maxval); |
| 298 | JSAMPLE b = read_pbm_integer(cinfo, infile, maxval); |
| 299 | rgb_to_cmyk(r, g, b, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 300 | ptr += 4; |
| 301 | } |
| 302 | } else { |
| 303 | for (col = cinfo->image_width; col > 0; col--) { |
| 304 | JSAMPLE r = rescale[read_pbm_integer(cinfo, infile, maxval)]; |
| 305 | JSAMPLE g = rescale[read_pbm_integer(cinfo, infile, maxval)]; |
| 306 | JSAMPLE b = rescale[read_pbm_integer(cinfo, infile, maxval)]; |
| 307 | rgb_to_cmyk(r, g, b, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 308 | ptr += 4; |
| 309 | } |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 310 | } |
| 311 | return 1; |
| 312 | } |
| 313 | |
| 314 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 315 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 316 | get_scaled_gray_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 317 | /* This version is for reading raw-byte-format PGM files with any maxval */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 318 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 319 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 320 | register JSAMPROW ptr; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 321 | register U_CHAR *bufferptr; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 322 | register JSAMPLE *rescale = source->rescale; |
| 323 | JDIMENSION col; |
| 324 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 325 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 326 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 327 | ptr = source->pub.buffer[0]; |
| 328 | bufferptr = source->iobuffer; |
| 329 | for (col = cinfo->image_width; col > 0; col--) { |
| 330 | *ptr++ = rescale[UCH(*bufferptr++)]; |
| 331 | } |
| 332 | return 1; |
| 333 | } |
| 334 | |
| 335 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 336 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 337 | get_gray_rgb_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
| 338 | /* This version is for reading raw-byte-format PGM files with any maxval |
| 339 | and converting to extended RGB */ |
| 340 | { |
| 341 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
| 342 | register JSAMPROW ptr; |
| 343 | register U_CHAR *bufferptr; |
| 344 | register JSAMPLE *rescale = source->rescale; |
| 345 | JDIMENSION col; |
| 346 | unsigned int maxval = source->maxval; |
| 347 | register int rindex = rgb_red[cinfo->in_color_space]; |
| 348 | register int gindex = rgb_green[cinfo->in_color_space]; |
| 349 | register int bindex = rgb_blue[cinfo->in_color_space]; |
| 350 | register int aindex = alpha_index[cinfo->in_color_space]; |
| 351 | register int ps = rgb_pixelsize[cinfo->in_color_space]; |
| 352 | |
| 353 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
| 354 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 355 | ptr = source->pub.buffer[0]; |
| 356 | bufferptr = source->iobuffer; |
| 357 | if (maxval == MAXJSAMPLE) { |
| 358 | if (aindex >= 0) |
| 359 | GRAY_RGB_READ_LOOP(*bufferptr++, ptr[aindex] = 0xFF;) |
| 360 | else |
| 361 | GRAY_RGB_READ_LOOP(*bufferptr++,) |
| 362 | } else { |
| 363 | if (aindex >= 0) |
| 364 | GRAY_RGB_READ_LOOP(rescale[UCH(*bufferptr++)], ptr[aindex] = 0xFF;) |
| 365 | else |
| 366 | GRAY_RGB_READ_LOOP(rescale[UCH(*bufferptr++)],) |
| 367 | } |
| 368 | return 1; |
| 369 | } |
| 370 | |
| 371 | |
| 372 | METHODDEF(JDIMENSION) |
| 373 | get_gray_cmyk_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
| 374 | /* This version is for reading raw-byte-format PGM files with any maxval |
| 375 | and converting to CMYK */ |
| 376 | { |
| 377 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
| 378 | register JSAMPROW ptr; |
| 379 | register U_CHAR *bufferptr; |
| 380 | register JSAMPLE *rescale = source->rescale; |
| 381 | JDIMENSION col; |
| 382 | unsigned int maxval = source->maxval; |
| 383 | |
| 384 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
| 385 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 386 | ptr = source->pub.buffer[0]; |
| 387 | bufferptr = source->iobuffer; |
| 388 | if (maxval == MAXJSAMPLE) { |
| 389 | for (col = cinfo->image_width; col > 0; col--) { |
| 390 | JSAMPLE gray = *bufferptr++; |
| 391 | rgb_to_cmyk(gray, gray, gray, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 392 | ptr += 4; |
| 393 | } |
| 394 | } else { |
| 395 | for (col = cinfo->image_width; col > 0; col--) { |
| 396 | JSAMPLE gray = rescale[UCH(*bufferptr++)]; |
| 397 | rgb_to_cmyk(gray, gray, gray, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 398 | ptr += 4; |
| 399 | } |
| 400 | } |
| 401 | return 1; |
| 402 | } |
| 403 | |
| 404 | |
| 405 | METHODDEF(JDIMENSION) |
| 406 | get_rgb_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 407 | /* This version is for reading raw-byte-format PPM files with any maxval */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 408 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 409 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 410 | register JSAMPROW ptr; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 411 | register U_CHAR *bufferptr; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 412 | register JSAMPLE *rescale = source->rescale; |
| 413 | JDIMENSION col; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 414 | unsigned int maxval = source->maxval; |
| 415 | register int rindex = rgb_red[cinfo->in_color_space]; |
| 416 | register int gindex = rgb_green[cinfo->in_color_space]; |
| 417 | register int bindex = rgb_blue[cinfo->in_color_space]; |
| 418 | register int aindex = alpha_index[cinfo->in_color_space]; |
| 419 | register int ps = rgb_pixelsize[cinfo->in_color_space]; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 420 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 421 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 422 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 423 | ptr = source->pub.buffer[0]; |
| 424 | bufferptr = source->iobuffer; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 425 | if (maxval == MAXJSAMPLE) { |
| 426 | if (aindex >= 0) |
| 427 | RGB_READ_LOOP(*bufferptr++, ptr[aindex] = 0xFF;) |
| 428 | else |
| 429 | RGB_READ_LOOP(*bufferptr++,) |
| 430 | } else { |
| 431 | if (aindex >= 0) |
| 432 | RGB_READ_LOOP(rescale[UCH(*bufferptr++)], ptr[aindex] = 0xFF;) |
| 433 | else |
| 434 | RGB_READ_LOOP(rescale[UCH(*bufferptr++)],) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 435 | } |
| 436 | return 1; |
| 437 | } |
| 438 | |
| 439 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 440 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 441 | get_rgb_cmyk_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
| 442 | /* This version is for reading raw-byte-format PPM files with any maxval and |
| 443 | converting to CMYK */ |
| 444 | { |
| 445 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
| 446 | register JSAMPROW ptr; |
| 447 | register U_CHAR *bufferptr; |
| 448 | register JSAMPLE *rescale = source->rescale; |
| 449 | JDIMENSION col; |
| 450 | unsigned int maxval = source->maxval; |
| 451 | |
| 452 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
| 453 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 454 | ptr = source->pub.buffer[0]; |
| 455 | bufferptr = source->iobuffer; |
| 456 | if (maxval == MAXJSAMPLE) { |
| 457 | for (col = cinfo->image_width; col > 0; col--) { |
| 458 | JSAMPLE r = *bufferptr++; |
| 459 | JSAMPLE g = *bufferptr++; |
| 460 | JSAMPLE b = *bufferptr++; |
| 461 | rgb_to_cmyk(r, g, b, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 462 | ptr += 4; |
| 463 | } |
| 464 | } else { |
| 465 | for (col = cinfo->image_width; col > 0; col--) { |
| 466 | JSAMPLE r = rescale[UCH(*bufferptr++)]; |
| 467 | JSAMPLE g = rescale[UCH(*bufferptr++)]; |
| 468 | JSAMPLE b = rescale[UCH(*bufferptr++)]; |
| 469 | rgb_to_cmyk(r, g, b, ptr, ptr + 1, ptr + 2, ptr + 3); |
| 470 | ptr += 4; |
| 471 | } |
| 472 | } |
| 473 | return 1; |
| 474 | } |
| 475 | |
| 476 | |
| 477 | METHODDEF(JDIMENSION) |
| 478 | get_raw_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 479 | /* This version is for reading raw-byte-format files with maxval = MAXJSAMPLE. |
| 480 | * In this case we just read right into the JSAMPLE buffer! |
| 481 | * Note that same code works for PPM and PGM files. |
| 482 | */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 483 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 484 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 485 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 486 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 487 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 488 | return 1; |
| 489 | } |
| 490 | |
| 491 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 492 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 493 | get_word_gray_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 494 | /* This version is for reading raw-word-format PGM files with any maxval */ |
| 495 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 496 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 497 | register JSAMPROW ptr; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 498 | register U_CHAR *bufferptr; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 499 | register JSAMPLE *rescale = source->rescale; |
| 500 | JDIMENSION col; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 501 | unsigned int maxval = source->maxval; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 502 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 503 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 504 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 505 | ptr = source->pub.buffer[0]; |
| 506 | bufferptr = source->iobuffer; |
| 507 | for (col = cinfo->image_width; col > 0; col--) { |
Colin Cross | 98125af | 2016-12-01 16:56:18 -0800 | [diff] [blame] | 508 | register unsigned int temp; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 509 | temp = UCH(*bufferptr++) << 8; |
| 510 | temp |= UCH(*bufferptr++); |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 511 | if (temp > maxval) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 512 | ERREXIT(cinfo, JERR_PPM_OUTOFRANGE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 513 | *ptr++ = rescale[temp]; |
| 514 | } |
| 515 | return 1; |
| 516 | } |
| 517 | |
| 518 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 519 | METHODDEF(JDIMENSION) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 520 | get_word_rgb_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 521 | /* This version is for reading raw-word-format PPM files with any maxval */ |
| 522 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 523 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 524 | register JSAMPROW ptr; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 525 | register U_CHAR *bufferptr; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 526 | register JSAMPLE *rescale = source->rescale; |
| 527 | JDIMENSION col; |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 528 | unsigned int maxval = source->maxval; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 529 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 530 | if (!ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 531 | ERREXIT(cinfo, JERR_INPUT_EOF); |
| 532 | ptr = source->pub.buffer[0]; |
| 533 | bufferptr = source->iobuffer; |
| 534 | for (col = cinfo->image_width; col > 0; col--) { |
Colin Cross | 98125af | 2016-12-01 16:56:18 -0800 | [diff] [blame] | 535 | register unsigned int temp; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 536 | temp = UCH(*bufferptr++) << 8; |
| 537 | temp |= UCH(*bufferptr++); |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 538 | if (temp > maxval) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 539 | ERREXIT(cinfo, JERR_PPM_OUTOFRANGE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 540 | *ptr++ = rescale[temp]; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 541 | temp = UCH(*bufferptr++) << 8; |
| 542 | temp |= UCH(*bufferptr++); |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 543 | if (temp > maxval) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 544 | ERREXIT(cinfo, JERR_PPM_OUTOFRANGE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 545 | *ptr++ = rescale[temp]; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 546 | temp = UCH(*bufferptr++) << 8; |
| 547 | temp |= UCH(*bufferptr++); |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 548 | if (temp > maxval) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 549 | ERREXIT(cinfo, JERR_PPM_OUTOFRANGE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 550 | *ptr++ = rescale[temp]; |
| 551 | } |
| 552 | return 1; |
| 553 | } |
| 554 | |
| 555 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 556 | /* |
| 557 | * Read the file header; return image size and component count. |
| 558 | */ |
| 559 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 560 | METHODDEF(void) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 561 | start_input_ppm(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 562 | { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 563 | ppm_source_ptr source = (ppm_source_ptr)sinfo; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 564 | int c; |
| 565 | unsigned int w, h, maxval; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 566 | boolean need_iobuffer, use_raw_buffer, need_rescale; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 567 | |
| 568 | if (getc(source->pub.input_file) != 'P') |
| 569 | ERREXIT(cinfo, JERR_PPM_NOT); |
| 570 | |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 571 | c = getc(source->pub.input_file); /* subformat discriminator character */ |
| 572 | |
| 573 | /* detect unsupported variants (ie, PBM) before trying to read header */ |
| 574 | switch (c) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 575 | case '2': /* it's a text-format PGM file */ |
| 576 | case '3': /* it's a text-format PPM file */ |
| 577 | case '5': /* it's a raw-format PGM file */ |
| 578 | case '6': /* it's a raw-format PPM file */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 579 | break; |
| 580 | default: |
| 581 | ERREXIT(cinfo, JERR_PPM_NOT); |
| 582 | break; |
| 583 | } |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 584 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 585 | /* fetch the remaining header info */ |
Frank Bossen | 6709e4a | 2014-12-29 19:42:20 +0100 | [diff] [blame] | 586 | w = read_pbm_integer(cinfo, source->pub.input_file, 65535); |
| 587 | h = read_pbm_integer(cinfo, source->pub.input_file, 65535); |
| 588 | maxval = read_pbm_integer(cinfo, source->pub.input_file, 65535); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 589 | |
| 590 | if (w <= 0 || h <= 0 || maxval <= 0) /* error check */ |
| 591 | ERREXIT(cinfo, JERR_PPM_NOT); |
| 592 | |
| 593 | cinfo->data_precision = BITS_IN_JSAMPLE; /* we always rescale data to this */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 594 | cinfo->image_width = (JDIMENSION)w; |
| 595 | cinfo->image_height = (JDIMENSION)h; |
Frank Bossen | 6709e4a | 2014-12-29 19:42:20 +0100 | [diff] [blame] | 596 | source->maxval = maxval; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 597 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 598 | /* initialize flags to most common settings */ |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 599 | need_iobuffer = TRUE; /* do we need an I/O buffer? */ |
| 600 | use_raw_buffer = FALSE; /* do we map input buffer onto I/O buffer? */ |
| 601 | need_rescale = TRUE; /* do we need a rescale array? */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 602 | |
| 603 | switch (c) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 604 | case '2': /* it's a text-format PGM file */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 605 | if (cinfo->in_color_space == JCS_UNKNOWN) |
| 606 | cinfo->in_color_space = JCS_GRAYSCALE; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 607 | TRACEMS2(cinfo, 1, JTRC_PGM_TEXT, w, h); |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 608 | if (cinfo->in_color_space == JCS_GRAYSCALE) |
| 609 | source->pub.get_pixel_rows = get_text_gray_row; |
| 610 | else if (IsExtRGB(cinfo->in_color_space)) |
| 611 | source->pub.get_pixel_rows = get_text_gray_rgb_row; |
| 612 | else if (cinfo->in_color_space == JCS_CMYK) |
| 613 | source->pub.get_pixel_rows = get_text_gray_cmyk_row; |
| 614 | else |
| 615 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 616 | need_iobuffer = FALSE; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 617 | break; |
| 618 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 619 | case '3': /* it's a text-format PPM file */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 620 | if (cinfo->in_color_space == JCS_UNKNOWN) |
| 621 | cinfo->in_color_space = JCS_EXT_RGB; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 622 | TRACEMS2(cinfo, 1, JTRC_PPM_TEXT, w, h); |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 623 | if (IsExtRGB(cinfo->in_color_space)) |
| 624 | source->pub.get_pixel_rows = get_text_rgb_row; |
| 625 | else if (cinfo->in_color_space == JCS_CMYK) |
| 626 | source->pub.get_pixel_rows = get_text_rgb_cmyk_row; |
| 627 | else |
| 628 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 629 | need_iobuffer = FALSE; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 630 | break; |
| 631 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 632 | case '5': /* it's a raw-format PGM file */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 633 | if (cinfo->in_color_space == JCS_UNKNOWN) |
| 634 | cinfo->in_color_space = JCS_GRAYSCALE; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 635 | TRACEMS2(cinfo, 1, JTRC_PGM, w, h); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 636 | if (maxval > 255) { |
| 637 | source->pub.get_pixel_rows = get_word_gray_row; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 638 | } else if (maxval == MAXJSAMPLE && sizeof(JSAMPLE) == sizeof(U_CHAR) && |
| 639 | cinfo->in_color_space == JCS_GRAYSCALE) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 640 | source->pub.get_pixel_rows = get_raw_row; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 641 | use_raw_buffer = TRUE; |
| 642 | need_rescale = FALSE; |
| 643 | } else { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 644 | if (cinfo->in_color_space == JCS_GRAYSCALE) |
| 645 | source->pub.get_pixel_rows = get_scaled_gray_row; |
| 646 | else if (IsExtRGB(cinfo->in_color_space)) |
| 647 | source->pub.get_pixel_rows = get_gray_rgb_row; |
| 648 | else if (cinfo->in_color_space == JCS_CMYK) |
| 649 | source->pub.get_pixel_rows = get_gray_cmyk_row; |
| 650 | else |
| 651 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 652 | } |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 653 | break; |
| 654 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 655 | case '6': /* it's a raw-format PPM file */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 656 | if (cinfo->in_color_space == JCS_UNKNOWN) |
| 657 | cinfo->in_color_space = JCS_EXT_RGB; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 658 | TRACEMS2(cinfo, 1, JTRC_PPM, w, h); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 659 | if (maxval > 255) { |
| 660 | source->pub.get_pixel_rows = get_word_rgb_row; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 661 | } else if (maxval == MAXJSAMPLE && sizeof(JSAMPLE) == sizeof(U_CHAR) && |
| 662 | (cinfo->in_color_space == JCS_EXT_RGB |
| 663 | #if RGB_RED == 0 && RGB_GREEN == 1 && RGB_BLUE == 2 && RGB_PIXELSIZE == 3 |
| 664 | || cinfo->in_color_space == JCS_RGB |
| 665 | #endif |
| 666 | )) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 667 | source->pub.get_pixel_rows = get_raw_row; |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 668 | use_raw_buffer = TRUE; |
| 669 | need_rescale = FALSE; |
| 670 | } else { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 671 | if (IsExtRGB(cinfo->in_color_space)) |
| 672 | source->pub.get_pixel_rows = get_rgb_row; |
| 673 | else if (cinfo->in_color_space == JCS_CMYK) |
| 674 | source->pub.get_pixel_rows = get_rgb_cmyk_row; |
| 675 | else |
| 676 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 677 | } |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 678 | break; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 679 | } |
| 680 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 681 | if (IsExtRGB(cinfo->in_color_space)) |
| 682 | cinfo->input_components = rgb_pixelsize[cinfo->in_color_space]; |
| 683 | else if (cinfo->in_color_space == JCS_GRAYSCALE) |
| 684 | cinfo->input_components = 1; |
| 685 | else if (cinfo->in_color_space == JCS_CMYK) |
| 686 | cinfo->input_components = 4; |
| 687 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 688 | /* Allocate space for I/O buffer: 1 or 3 bytes or words/pixel. */ |
| 689 | if (need_iobuffer) { |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 690 | if (c == '6') |
| 691 | source->buffer_width = (size_t)w * 3 * |
| 692 | ((maxval <= 255) ? sizeof(U_CHAR) : (2 * sizeof(U_CHAR))); |
| 693 | else |
| 694 | source->buffer_width = (size_t)w * |
| 695 | ((maxval <= 255) ? sizeof(U_CHAR) : (2 * sizeof(U_CHAR))); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 696 | source->iobuffer = (U_CHAR *) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 697 | (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 698 | source->buffer_width); |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 699 | } |
| 700 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 701 | /* Create compressor input buffer. */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 702 | if (use_raw_buffer) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 703 | /* For unscaled raw-input case, we can just map it onto the I/O buffer. */ |
| 704 | /* Synthesize a JSAMPARRAY pointer structure */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 705 | source->pixrow = (JSAMPROW)source->iobuffer; |
| 706 | source->pub.buffer = &source->pixrow; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 707 | source->pub.buffer_height = 1; |
| 708 | } else { |
| 709 | /* Need to translate anyway, so make a separate sample buffer. */ |
| 710 | source->pub.buffer = (*cinfo->mem->alloc_sarray) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 711 | ((j_common_ptr)cinfo, JPOOL_IMAGE, |
| 712 | (JDIMENSION)w * cinfo->input_components, (JDIMENSION)1); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 713 | source->pub.buffer_height = 1; |
| 714 | } |
| 715 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 716 | /* Compute the rescaling array if required. */ |
| 717 | if (need_rescale) { |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 718 | long val, half_maxval; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 719 | |
| 720 | /* On 16-bit-int machines we have to be careful of maxval = 65535 */ |
| 721 | source->rescale = (JSAMPLE *) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 722 | (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, |
| 723 | (size_t)(((long)maxval + 1L) * |
| 724 | sizeof(JSAMPLE))); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 725 | half_maxval = maxval / 2; |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 726 | for (val = 0; val <= (long)maxval; val++) { |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 727 | /* The multiplication here must be done in 32 bits to avoid overflow */ |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 728 | source->rescale[val] = (JSAMPLE)((val * MAXJSAMPLE + half_maxval) / |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 729 | maxval); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | |
| 735 | /* |
| 736 | * Finish up at the end of the file. |
| 737 | */ |
| 738 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 739 | METHODDEF(void) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 740 | finish_input_ppm(j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 741 | { |
| 742 | /* no work */ |
| 743 | } |
| 744 | |
| 745 | |
| 746 | /* |
| 747 | * The module selection routine for PPM format input. |
| 748 | */ |
| 749 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 750 | GLOBAL(cjpeg_source_ptr) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 751 | jinit_read_ppm(j_compress_ptr cinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 752 | { |
| 753 | ppm_source_ptr source; |
| 754 | |
| 755 | /* Create module interface object */ |
| 756 | source = (ppm_source_ptr) |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 757 | (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, |
| 758 | sizeof(ppm_source_struct)); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 759 | /* Fill in method ptrs, except get_pixel_rows which start_input sets */ |
| 760 | source->pub.start_input = start_input_ppm; |
| 761 | source->pub.finish_input = finish_input_ppm; |
| 762 | |
Leon Scroggins III | 3993b37 | 2018-07-16 10:43:45 -0400 | [diff] [blame^] | 763 | return (cjpeg_source_ptr)source; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | #endif /* PPM_SUPPORTED */ |