diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdppm.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdppm.c | 918 |
1 files changed, 459 insertions, 459 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdppm.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdppm.c index 9dcd2dc..a757022 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdppm.c +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdppm.c | |||
@@ -1,459 +1,459 @@ | |||
1 | /* | 1 | /* |
2 | * rdppm.c | 2 | * rdppm.c |
3 | * | 3 | * |
4 | * Copyright (C) 1991-1997, Thomas G. Lane. | 4 | * Copyright (C) 1991-1997, Thomas G. Lane. |
5 | * Modified 2009 by Bill Allombert, Guido Vollbeding. | 5 | * Modified 2009 by Bill Allombert, Guido Vollbeding. |
6 | * This file is part of the Independent JPEG Group's software. | 6 | * This file is part of the Independent JPEG Group's software. |
7 | * For conditions of distribution and use, see the accompanying README file. | 7 | * For conditions of distribution and use, see the accompanying README file. |
8 | * | 8 | * |
9 | * This file contains routines to read input images in PPM/PGM format. | 9 | * This file contains routines to read input images in PPM/PGM format. |
10 | * The extended 2-byte-per-sample raw PPM/PGM formats are supported. | 10 | * The extended 2-byte-per-sample raw PPM/PGM formats are supported. |
11 | * The PBMPLUS library is NOT required to compile this software | 11 | * The PBMPLUS library is NOT required to compile this software |
12 | * (but it is highly useful as a set of PPM image manipulation programs). | 12 | * (but it is highly useful as a set of PPM image manipulation programs). |
13 | * | 13 | * |
14 | * These routines may need modification for non-Unix environments or | 14 | * These routines may need modification for non-Unix environments or |
15 | * specialized applications. As they stand, they assume input from | 15 | * specialized applications. As they stand, they assume input from |
16 | * an ordinary stdio stream. They further assume that reading begins | 16 | * an ordinary stdio stream. They further assume that reading begins |
17 | * at the start of the file; start_input may need work if the | 17 | * at the start of the file; start_input may need work if the |
18 | * user interface has already read some data (e.g., to determine that | 18 | * user interface has already read some data (e.g., to determine that |
19 | * the file is indeed PPM format). | 19 | * the file is indeed PPM format). |
20 | */ | 20 | */ |
21 | 21 | ||
22 | #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ | 22 | #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ |
23 | 23 | ||
24 | #ifdef PPM_SUPPORTED | 24 | #ifdef PPM_SUPPORTED |
25 | 25 | ||
26 | 26 | ||
27 | /* Portions of this code are based on the PBMPLUS library, which is: | 27 | /* Portions of this code are based on the PBMPLUS library, which is: |
28 | ** | 28 | ** |
29 | ** Copyright (C) 1988 by Jef Poskanzer. | 29 | ** Copyright (C) 1988 by Jef Poskanzer. |
30 | ** | 30 | ** |
31 | ** Permission to use, copy, modify, and distribute this software and its | 31 | ** Permission to use, copy, modify, and distribute this software and its |
32 | ** documentation for any purpose and without fee is hereby granted, provided | 32 | ** documentation for any purpose and without fee is hereby granted, provided |
33 | ** that the above copyright notice appear in all copies and that both that | 33 | ** that the above copyright notice appear in all copies and that both that |
34 | ** copyright notice and this permission notice appear in supporting | 34 | ** copyright notice and this permission notice appear in supporting |
35 | ** documentation. This software is provided "as is" without express or | 35 | ** documentation. This software is provided "as is" without express or |
36 | ** implied warranty. | 36 | ** implied warranty. |
37 | */ | 37 | */ |
38 | 38 | ||
39 | 39 | ||
40 | /* Macros to deal with unsigned chars as efficiently as compiler allows */ | 40 | /* Macros to deal with unsigned chars as efficiently as compiler allows */ |
41 | 41 | ||
42 | #ifdef HAVE_UNSIGNED_CHAR | 42 | #ifdef HAVE_UNSIGNED_CHAR |
43 | typedef unsigned char U_CHAR; | 43 | typedef unsigned char U_CHAR; |
44 | #define UCH(x) ((int) (x)) | 44 | #define UCH(x) ((int) (x)) |
45 | #else /* !HAVE_UNSIGNED_CHAR */ | 45 | #else /* !HAVE_UNSIGNED_CHAR */ |
46 | #ifdef CHAR_IS_UNSIGNED | 46 | #ifdef CHAR_IS_UNSIGNED |
47 | typedef char U_CHAR; | 47 | typedef char U_CHAR; |
48 | #define UCH(x) ((int) (x)) | 48 | #define UCH(x) ((int) (x)) |
49 | #else | 49 | #else |
50 | typedef char U_CHAR; | 50 | typedef char U_CHAR; |
51 | #define UCH(x) ((int) (x) & 0xFF) | 51 | #define UCH(x) ((int) (x) & 0xFF) |
52 | #endif | 52 | #endif |
53 | #endif /* HAVE_UNSIGNED_CHAR */ | 53 | #endif /* HAVE_UNSIGNED_CHAR */ |
54 | 54 | ||
55 | 55 | ||
56 | #define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len))) | 56 | #define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len))) |
57 | 57 | ||
58 | 58 | ||
59 | /* | 59 | /* |
60 | * On most systems, reading individual bytes with getc() is drastically less | 60 | * On most systems, reading individual bytes with getc() is drastically less |
61 | * efficient than buffering a row at a time with fread(). On PCs, we must | 61 | * efficient than buffering a row at a time with fread(). On PCs, we must |
62 | * allocate the buffer in near data space, because we are assuming small-data | 62 | * allocate the buffer in near data space, because we are assuming small-data |
63 | * memory model, wherein fread() can't reach far memory. If you need to | 63 | * memory model, wherein fread() can't reach far memory. If you need to |
64 | * process very wide images on a PC, you might have to compile in large-memory | 64 | * process very wide images on a PC, you might have to compile in large-memory |
65 | * model, or else replace fread() with a getc() loop --- which will be much | 65 | * model, or else replace fread() with a getc() loop --- which will be much |
66 | * slower. | 66 | * slower. |
67 | */ | 67 | */ |
68 | 68 | ||
69 | 69 | ||
70 | /* Private version of data source object */ | 70 | /* Private version of data source object */ |
71 | 71 | ||
72 | typedef struct { | 72 | typedef struct { |
73 | struct cjpeg_source_struct pub; /* public fields */ | 73 | struct cjpeg_source_struct pub; /* public fields */ |
74 | 74 | ||
75 | U_CHAR *iobuffer; /* non-FAR pointer to I/O buffer */ | 75 | U_CHAR *iobuffer; /* non-FAR pointer to I/O buffer */ |
76 | JSAMPROW pixrow; /* FAR pointer to same */ | 76 | JSAMPROW pixrow; /* FAR pointer to same */ |
77 | size_t buffer_width; /* width of I/O buffer */ | 77 | size_t buffer_width; /* width of I/O buffer */ |
78 | JSAMPLE *rescale; /* => maxval-remapping array, or NULL */ | 78 | JSAMPLE *rescale; /* => maxval-remapping array, or NULL */ |
79 | } ppm_source_struct; | 79 | } ppm_source_struct; |
80 | 80 | ||
81 | typedef ppm_source_struct * ppm_source_ptr; | 81 | typedef ppm_source_struct * ppm_source_ptr; |
82 | 82 | ||
83 | 83 | ||
84 | LOCAL(int) | 84 | LOCAL(int) |
85 | pbm_getc (FILE * infile) | 85 | pbm_getc (FILE * infile) |
86 | /* Read next char, skipping over any comments */ | 86 | /* Read next char, skipping over any comments */ |
87 | /* A comment/newline sequence is returned as a newline */ | 87 | /* A comment/newline sequence is returned as a newline */ |
88 | { | 88 | { |
89 | register int ch; | 89 | register int ch; |
90 | 90 | ||
91 | ch = getc(infile); | 91 | ch = getc(infile); |
92 | if (ch == '#') { | 92 | if (ch == '#') { |
93 | do { | 93 | do { |
94 | ch = getc(infile); | 94 | ch = getc(infile); |
95 | } while (ch != '\n' && ch != EOF); | 95 | } while (ch != '\n' && ch != EOF); |
96 | } | 96 | } |
97 | return ch; | 97 | return ch; |
98 | } | 98 | } |
99 | 99 | ||
100 | 100 | ||
101 | LOCAL(unsigned int) | 101 | LOCAL(unsigned int) |
102 | read_pbm_integer (j_compress_ptr cinfo, FILE * infile) | 102 | read_pbm_integer (j_compress_ptr cinfo, FILE * infile) |
103 | /* Read an unsigned decimal integer from the PPM file */ | 103 | /* Read an unsigned decimal integer from the PPM file */ |
104 | /* Swallows one trailing character after the integer */ | 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. */ | 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. */ | 106 | /* This should not be a problem in practice. */ |
107 | { | 107 | { |
108 | register int ch; | 108 | register int ch; |
109 | register unsigned int val; | 109 | register unsigned int val; |
110 | 110 | ||
111 | /* Skip any leading whitespace */ | 111 | /* Skip any leading whitespace */ |
112 | do { | 112 | do { |
113 | ch = pbm_getc(infile); | 113 | ch = pbm_getc(infile); |
114 | if (ch == EOF) | 114 | if (ch == EOF) |
115 | ERREXIT(cinfo, JERR_INPUT_EOF); | 115 | ERREXIT(cinfo, JERR_INPUT_EOF); |
116 | } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'); | 116 | } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'); |
117 | 117 | ||
118 | if (ch < '0' || ch > '9') | 118 | if (ch < '0' || ch > '9') |
119 | ERREXIT(cinfo, JERR_PPM_NONNUMERIC); | 119 | ERREXIT(cinfo, JERR_PPM_NONNUMERIC); |
120 | 120 | ||
121 | val = ch - '0'; | 121 | val = ch - '0'; |
122 | while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') { | 122 | while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') { |
123 | val *= 10; | 123 | val *= 10; |
124 | val += ch - '0'; | 124 | val += ch - '0'; |
125 | } | 125 | } |
126 | return val; | 126 | return val; |
127 | } | 127 | } |
128 | 128 | ||
129 | 129 | ||
130 | /* | 130 | /* |
131 | * Read one row of pixels. | 131 | * Read one row of pixels. |
132 | * | 132 | * |
133 | * We provide several different versions depending on input file format. | 133 | * We provide several different versions depending on input file format. |
134 | * In all cases, input is scaled to the size of JSAMPLE. | 134 | * In all cases, input is scaled to the size of JSAMPLE. |
135 | * | 135 | * |
136 | * A really fast path is provided for reading byte/sample raw files with | 136 | * A really fast path is provided for reading byte/sample raw files with |
137 | * maxval = MAXJSAMPLE, which is the normal case for 8-bit data. | 137 | * maxval = MAXJSAMPLE, which is the normal case for 8-bit data. |
138 | */ | 138 | */ |
139 | 139 | ||
140 | 140 | ||
141 | METHODDEF(JDIMENSION) | 141 | METHODDEF(JDIMENSION) |
142 | get_text_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 142 | get_text_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
143 | /* This version is for reading text-format PGM files with any maxval */ | 143 | /* This version is for reading text-format PGM files with any maxval */ |
144 | { | 144 | { |
145 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 145 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
146 | FILE * infile = source->pub.input_file; | 146 | FILE * infile = source->pub.input_file; |
147 | register JSAMPROW ptr; | 147 | register JSAMPROW ptr; |
148 | register JSAMPLE *rescale = source->rescale; | 148 | register JSAMPLE *rescale = source->rescale; |
149 | JDIMENSION col; | 149 | JDIMENSION col; |
150 | 150 | ||
151 | ptr = source->pub.buffer[0]; | 151 | ptr = source->pub.buffer[0]; |
152 | for (col = cinfo->image_width; col > 0; col--) { | 152 | for (col = cinfo->image_width; col > 0; col--) { |
153 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; | 153 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; |
154 | } | 154 | } |
155 | return 1; | 155 | return 1; |
156 | } | 156 | } |
157 | 157 | ||
158 | 158 | ||
159 | METHODDEF(JDIMENSION) | 159 | METHODDEF(JDIMENSION) |
160 | get_text_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 160 | get_text_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
161 | /* This version is for reading text-format PPM files with any maxval */ | 161 | /* This version is for reading text-format PPM files with any maxval */ |
162 | { | 162 | { |
163 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 163 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
164 | FILE * infile = source->pub.input_file; | 164 | FILE * infile = source->pub.input_file; |
165 | register JSAMPROW ptr; | 165 | register JSAMPROW ptr; |
166 | register JSAMPLE *rescale = source->rescale; | 166 | register JSAMPLE *rescale = source->rescale; |
167 | JDIMENSION col; | 167 | JDIMENSION col; |
168 | 168 | ||
169 | ptr = source->pub.buffer[0]; | 169 | ptr = source->pub.buffer[0]; |
170 | for (col = cinfo->image_width; col > 0; col--) { | 170 | for (col = cinfo->image_width; col > 0; col--) { |
171 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; | 171 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; |
172 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; | 172 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; |
173 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; | 173 | *ptr++ = rescale[read_pbm_integer(cinfo, infile)]; |
174 | } | 174 | } |
175 | return 1; | 175 | return 1; |
176 | } | 176 | } |
177 | 177 | ||
178 | 178 | ||
179 | METHODDEF(JDIMENSION) | 179 | METHODDEF(JDIMENSION) |
180 | get_scaled_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 180 | get_scaled_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
181 | /* This version is for reading raw-byte-format PGM files with any maxval */ | 181 | /* This version is for reading raw-byte-format PGM files with any maxval */ |
182 | { | 182 | { |
183 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 183 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
184 | register JSAMPROW ptr; | 184 | register JSAMPROW ptr; |
185 | register U_CHAR * bufferptr; | 185 | register U_CHAR * bufferptr; |
186 | register JSAMPLE *rescale = source->rescale; | 186 | register JSAMPLE *rescale = source->rescale; |
187 | JDIMENSION col; | 187 | JDIMENSION col; |
188 | 188 | ||
189 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) | 189 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
190 | ERREXIT(cinfo, JERR_INPUT_EOF); | 190 | ERREXIT(cinfo, JERR_INPUT_EOF); |
191 | ptr = source->pub.buffer[0]; | 191 | ptr = source->pub.buffer[0]; |
192 | bufferptr = source->iobuffer; | 192 | bufferptr = source->iobuffer; |
193 | for (col = cinfo->image_width; col > 0; col--) { | 193 | for (col = cinfo->image_width; col > 0; col--) { |
194 | *ptr++ = rescale[UCH(*bufferptr++)]; | 194 | *ptr++ = rescale[UCH(*bufferptr++)]; |
195 | } | 195 | } |
196 | return 1; | 196 | return 1; |
197 | } | 197 | } |
198 | 198 | ||
199 | 199 | ||
200 | METHODDEF(JDIMENSION) | 200 | METHODDEF(JDIMENSION) |
201 | get_scaled_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 201 | get_scaled_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
202 | /* This version is for reading raw-byte-format PPM files with any maxval */ | 202 | /* This version is for reading raw-byte-format PPM files with any maxval */ |
203 | { | 203 | { |
204 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 204 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
205 | register JSAMPROW ptr; | 205 | register JSAMPROW ptr; |
206 | register U_CHAR * bufferptr; | 206 | register U_CHAR * bufferptr; |
207 | register JSAMPLE *rescale = source->rescale; | 207 | register JSAMPLE *rescale = source->rescale; |
208 | JDIMENSION col; | 208 | JDIMENSION col; |
209 | 209 | ||
210 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) | 210 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
211 | ERREXIT(cinfo, JERR_INPUT_EOF); | 211 | ERREXIT(cinfo, JERR_INPUT_EOF); |
212 | ptr = source->pub.buffer[0]; | 212 | ptr = source->pub.buffer[0]; |
213 | bufferptr = source->iobuffer; | 213 | bufferptr = source->iobuffer; |
214 | for (col = cinfo->image_width; col > 0; col--) { | 214 | for (col = cinfo->image_width; col > 0; col--) { |
215 | *ptr++ = rescale[UCH(*bufferptr++)]; | 215 | *ptr++ = rescale[UCH(*bufferptr++)]; |
216 | *ptr++ = rescale[UCH(*bufferptr++)]; | 216 | *ptr++ = rescale[UCH(*bufferptr++)]; |
217 | *ptr++ = rescale[UCH(*bufferptr++)]; | 217 | *ptr++ = rescale[UCH(*bufferptr++)]; |
218 | } | 218 | } |
219 | return 1; | 219 | return 1; |
220 | } | 220 | } |
221 | 221 | ||
222 | 222 | ||
223 | METHODDEF(JDIMENSION) | 223 | METHODDEF(JDIMENSION) |
224 | get_raw_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 224 | get_raw_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
225 | /* This version is for reading raw-byte-format files with maxval = MAXJSAMPLE. | 225 | /* This version is for reading raw-byte-format files with maxval = MAXJSAMPLE. |
226 | * In this case we just read right into the JSAMPLE buffer! | 226 | * In this case we just read right into the JSAMPLE buffer! |
227 | * Note that same code works for PPM and PGM files. | 227 | * Note that same code works for PPM and PGM files. |
228 | */ | 228 | */ |
229 | { | 229 | { |
230 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 230 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
231 | 231 | ||
232 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) | 232 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
233 | ERREXIT(cinfo, JERR_INPUT_EOF); | 233 | ERREXIT(cinfo, JERR_INPUT_EOF); |
234 | return 1; | 234 | return 1; |
235 | } | 235 | } |
236 | 236 | ||
237 | 237 | ||
238 | METHODDEF(JDIMENSION) | 238 | METHODDEF(JDIMENSION) |
239 | get_word_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 239 | get_word_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
240 | /* This version is for reading raw-word-format PGM files with any maxval */ | 240 | /* This version is for reading raw-word-format PGM files with any maxval */ |
241 | { | 241 | { |
242 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 242 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
243 | register JSAMPROW ptr; | 243 | register JSAMPROW ptr; |
244 | register U_CHAR * bufferptr; | 244 | register U_CHAR * bufferptr; |
245 | register JSAMPLE *rescale = source->rescale; | 245 | register JSAMPLE *rescale = source->rescale; |
246 | JDIMENSION col; | 246 | JDIMENSION col; |
247 | 247 | ||
248 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) | 248 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
249 | ERREXIT(cinfo, JERR_INPUT_EOF); | 249 | ERREXIT(cinfo, JERR_INPUT_EOF); |
250 | ptr = source->pub.buffer[0]; | 250 | ptr = source->pub.buffer[0]; |
251 | bufferptr = source->iobuffer; | 251 | bufferptr = source->iobuffer; |
252 | for (col = cinfo->image_width; col > 0; col--) { | 252 | for (col = cinfo->image_width; col > 0; col--) { |
253 | register int temp; | 253 | register int temp; |
254 | temp = UCH(*bufferptr++) << 8; | 254 | temp = UCH(*bufferptr++) << 8; |
255 | temp |= UCH(*bufferptr++); | 255 | temp |= UCH(*bufferptr++); |
256 | *ptr++ = rescale[temp]; | 256 | *ptr++ = rescale[temp]; |
257 | } | 257 | } |
258 | return 1; | 258 | return 1; |
259 | } | 259 | } |
260 | 260 | ||
261 | 261 | ||
262 | METHODDEF(JDIMENSION) | 262 | METHODDEF(JDIMENSION) |
263 | get_word_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 263 | get_word_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
264 | /* This version is for reading raw-word-format PPM files with any maxval */ | 264 | /* This version is for reading raw-word-format PPM files with any maxval */ |
265 | { | 265 | { |
266 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 266 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
267 | register JSAMPROW ptr; | 267 | register JSAMPROW ptr; |
268 | register U_CHAR * bufferptr; | 268 | register U_CHAR * bufferptr; |
269 | register JSAMPLE *rescale = source->rescale; | 269 | register JSAMPLE *rescale = source->rescale; |
270 | JDIMENSION col; | 270 | JDIMENSION col; |
271 | 271 | ||
272 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) | 272 | if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width)) |
273 | ERREXIT(cinfo, JERR_INPUT_EOF); | 273 | ERREXIT(cinfo, JERR_INPUT_EOF); |
274 | ptr = source->pub.buffer[0]; | 274 | ptr = source->pub.buffer[0]; |
275 | bufferptr = source->iobuffer; | 275 | bufferptr = source->iobuffer; |
276 | for (col = cinfo->image_width; col > 0; col--) { | 276 | for (col = cinfo->image_width; col > 0; col--) { |
277 | register int temp; | 277 | register int temp; |
278 | temp = UCH(*bufferptr++) << 8; | 278 | temp = UCH(*bufferptr++) << 8; |
279 | temp |= UCH(*bufferptr++); | 279 | temp |= UCH(*bufferptr++); |
280 | *ptr++ = rescale[temp]; | 280 | *ptr++ = rescale[temp]; |
281 | temp = UCH(*bufferptr++) << 8; | 281 | temp = UCH(*bufferptr++) << 8; |
282 | temp |= UCH(*bufferptr++); | 282 | temp |= UCH(*bufferptr++); |
283 | *ptr++ = rescale[temp]; | 283 | *ptr++ = rescale[temp]; |
284 | temp = UCH(*bufferptr++) << 8; | 284 | temp = UCH(*bufferptr++) << 8; |
285 | temp |= UCH(*bufferptr++); | 285 | temp |= UCH(*bufferptr++); |
286 | *ptr++ = rescale[temp]; | 286 | *ptr++ = rescale[temp]; |
287 | } | 287 | } |
288 | return 1; | 288 | return 1; |
289 | } | 289 | } |
290 | 290 | ||
291 | 291 | ||
292 | /* | 292 | /* |
293 | * Read the file header; return image size and component count. | 293 | * Read the file header; return image size and component count. |
294 | */ | 294 | */ |
295 | 295 | ||
296 | METHODDEF(void) | 296 | METHODDEF(void) |
297 | start_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 297 | start_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
298 | { | 298 | { |
299 | ppm_source_ptr source = (ppm_source_ptr) sinfo; | 299 | ppm_source_ptr source = (ppm_source_ptr) sinfo; |
300 | int c; | 300 | int c; |
301 | unsigned int w, h, maxval; | 301 | unsigned int w, h, maxval; |
302 | boolean need_iobuffer, use_raw_buffer, need_rescale; | 302 | boolean need_iobuffer, use_raw_buffer, need_rescale; |
303 | 303 | ||
304 | if (getc(source->pub.input_file) != 'P') | 304 | if (getc(source->pub.input_file) != 'P') |
305 | ERREXIT(cinfo, JERR_PPM_NOT); | 305 | ERREXIT(cinfo, JERR_PPM_NOT); |
306 | 306 | ||
307 | c = getc(source->pub.input_file); /* subformat discriminator character */ | 307 | c = getc(source->pub.input_file); /* subformat discriminator character */ |
308 | 308 | ||
309 | /* detect unsupported variants (ie, PBM) before trying to read header */ | 309 | /* detect unsupported variants (ie, PBM) before trying to read header */ |
310 | switch (c) { | 310 | switch (c) { |
311 | case '2': /* it's a text-format PGM file */ | 311 | case '2': /* it's a text-format PGM file */ |
312 | case '3': /* it's a text-format PPM file */ | 312 | case '3': /* it's a text-format PPM file */ |
313 | case '5': /* it's a raw-format PGM file */ | 313 | case '5': /* it's a raw-format PGM file */ |
314 | case '6': /* it's a raw-format PPM file */ | 314 | case '6': /* it's a raw-format PPM file */ |
315 | break; | 315 | break; |
316 | default: | 316 | default: |
317 | ERREXIT(cinfo, JERR_PPM_NOT); | 317 | ERREXIT(cinfo, JERR_PPM_NOT); |
318 | break; | 318 | break; |
319 | } | 319 | } |
320 | 320 | ||
321 | /* fetch the remaining header info */ | 321 | /* fetch the remaining header info */ |
322 | w = read_pbm_integer(cinfo, source->pub.input_file); | 322 | w = read_pbm_integer(cinfo, source->pub.input_file); |
323 | h = read_pbm_integer(cinfo, source->pub.input_file); | 323 | h = read_pbm_integer(cinfo, source->pub.input_file); |
324 | maxval = read_pbm_integer(cinfo, source->pub.input_file); | 324 | maxval = read_pbm_integer(cinfo, source->pub.input_file); |
325 | 325 | ||
326 | if (w <= 0 || h <= 0 || maxval <= 0) /* error check */ | 326 | if (w <= 0 || h <= 0 || maxval <= 0) /* error check */ |
327 | ERREXIT(cinfo, JERR_PPM_NOT); | 327 | ERREXIT(cinfo, JERR_PPM_NOT); |
328 | 328 | ||
329 | cinfo->data_precision = BITS_IN_JSAMPLE; /* we always rescale data to this */ | 329 | cinfo->data_precision = BITS_IN_JSAMPLE; /* we always rescale data to this */ |
330 | cinfo->image_width = (JDIMENSION) w; | 330 | cinfo->image_width = (JDIMENSION) w; |
331 | cinfo->image_height = (JDIMENSION) h; | 331 | cinfo->image_height = (JDIMENSION) h; |
332 | 332 | ||
333 | /* initialize flags to most common settings */ | 333 | /* initialize flags to most common settings */ |
334 | need_iobuffer = TRUE; /* do we need an I/O buffer? */ | 334 | need_iobuffer = TRUE; /* do we need an I/O buffer? */ |
335 | use_raw_buffer = FALSE; /* do we map input buffer onto I/O buffer? */ | 335 | use_raw_buffer = FALSE; /* do we map input buffer onto I/O buffer? */ |
336 | need_rescale = TRUE; /* do we need a rescale array? */ | 336 | need_rescale = TRUE; /* do we need a rescale array? */ |
337 | 337 | ||
338 | switch (c) { | 338 | switch (c) { |
339 | case '2': /* it's a text-format PGM file */ | 339 | case '2': /* it's a text-format PGM file */ |
340 | cinfo->input_components = 1; | 340 | cinfo->input_components = 1; |
341 | cinfo->in_color_space = JCS_GRAYSCALE; | 341 | cinfo->in_color_space = JCS_GRAYSCALE; |
342 | TRACEMS2(cinfo, 1, JTRC_PGM_TEXT, w, h); | 342 | TRACEMS2(cinfo, 1, JTRC_PGM_TEXT, w, h); |
343 | source->pub.get_pixel_rows = get_text_gray_row; | 343 | source->pub.get_pixel_rows = get_text_gray_row; |
344 | need_iobuffer = FALSE; | 344 | need_iobuffer = FALSE; |
345 | break; | 345 | break; |
346 | 346 | ||
347 | case '3': /* it's a text-format PPM file */ | 347 | case '3': /* it's a text-format PPM file */ |
348 | cinfo->input_components = 3; | 348 | cinfo->input_components = 3; |
349 | cinfo->in_color_space = JCS_RGB; | 349 | cinfo->in_color_space = JCS_RGB; |
350 | TRACEMS2(cinfo, 1, JTRC_PPM_TEXT, w, h); | 350 | TRACEMS2(cinfo, 1, JTRC_PPM_TEXT, w, h); |
351 | source->pub.get_pixel_rows = get_text_rgb_row; | 351 | source->pub.get_pixel_rows = get_text_rgb_row; |
352 | need_iobuffer = FALSE; | 352 | need_iobuffer = FALSE; |
353 | break; | 353 | break; |
354 | 354 | ||
355 | case '5': /* it's a raw-format PGM file */ | 355 | case '5': /* it's a raw-format PGM file */ |
356 | cinfo->input_components = 1; | 356 | cinfo->input_components = 1; |
357 | cinfo->in_color_space = JCS_GRAYSCALE; | 357 | cinfo->in_color_space = JCS_GRAYSCALE; |
358 | TRACEMS2(cinfo, 1, JTRC_PGM, w, h); | 358 | TRACEMS2(cinfo, 1, JTRC_PGM, w, h); |
359 | if (maxval > 255) { | 359 | if (maxval > 255) { |
360 | source->pub.get_pixel_rows = get_word_gray_row; | 360 | source->pub.get_pixel_rows = get_word_gray_row; |
361 | } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) { | 361 | } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) { |
362 | source->pub.get_pixel_rows = get_raw_row; | 362 | source->pub.get_pixel_rows = get_raw_row; |
363 | use_raw_buffer = TRUE; | 363 | use_raw_buffer = TRUE; |
364 | need_rescale = FALSE; | 364 | need_rescale = FALSE; |
365 | } else { | 365 | } else { |
366 | source->pub.get_pixel_rows = get_scaled_gray_row; | 366 | source->pub.get_pixel_rows = get_scaled_gray_row; |
367 | } | 367 | } |
368 | break; | 368 | break; |
369 | 369 | ||
370 | case '6': /* it's a raw-format PPM file */ | 370 | case '6': /* it's a raw-format PPM file */ |
371 | cinfo->input_components = 3; | 371 | cinfo->input_components = 3; |
372 | cinfo->in_color_space = JCS_RGB; | 372 | cinfo->in_color_space = JCS_RGB; |
373 | TRACEMS2(cinfo, 1, JTRC_PPM, w, h); | 373 | TRACEMS2(cinfo, 1, JTRC_PPM, w, h); |
374 | if (maxval > 255) { | 374 | if (maxval > 255) { |
375 | source->pub.get_pixel_rows = get_word_rgb_row; | 375 | source->pub.get_pixel_rows = get_word_rgb_row; |
376 | } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) { | 376 | } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) { |
377 | source->pub.get_pixel_rows = get_raw_row; | 377 | source->pub.get_pixel_rows = get_raw_row; |
378 | use_raw_buffer = TRUE; | 378 | use_raw_buffer = TRUE; |
379 | need_rescale = FALSE; | 379 | need_rescale = FALSE; |
380 | } else { | 380 | } else { |
381 | source->pub.get_pixel_rows = get_scaled_rgb_row; | 381 | source->pub.get_pixel_rows = get_scaled_rgb_row; |
382 | } | 382 | } |
383 | break; | 383 | break; |
384 | } | 384 | } |
385 | 385 | ||
386 | /* Allocate space for I/O buffer: 1 or 3 bytes or words/pixel. */ | 386 | /* Allocate space for I/O buffer: 1 or 3 bytes or words/pixel. */ |
387 | if (need_iobuffer) { | 387 | if (need_iobuffer) { |
388 | source->buffer_width = (size_t) w * cinfo->input_components * | 388 | source->buffer_width = (size_t) w * cinfo->input_components * |
389 | ((maxval<=255) ? SIZEOF(U_CHAR) : (2*SIZEOF(U_CHAR))); | 389 | ((maxval<=255) ? SIZEOF(U_CHAR) : (2*SIZEOF(U_CHAR))); |
390 | source->iobuffer = (U_CHAR *) | 390 | source->iobuffer = (U_CHAR *) |
391 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 391 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
392 | source->buffer_width); | 392 | source->buffer_width); |
393 | } | 393 | } |
394 | 394 | ||
395 | /* Create compressor input buffer. */ | 395 | /* Create compressor input buffer. */ |
396 | if (use_raw_buffer) { | 396 | if (use_raw_buffer) { |
397 | /* For unscaled raw-input case, we can just map it onto the I/O buffer. */ | 397 | /* For unscaled raw-input case, we can just map it onto the I/O buffer. */ |
398 | /* Synthesize a JSAMPARRAY pointer structure */ | 398 | /* Synthesize a JSAMPARRAY pointer structure */ |
399 | /* Cast here implies near->far pointer conversion on PCs */ | 399 | /* Cast here implies near->far pointer conversion on PCs */ |
400 | source->pixrow = (JSAMPROW) source->iobuffer; | 400 | source->pixrow = (JSAMPROW) source->iobuffer; |
401 | source->pub.buffer = & source->pixrow; | 401 | source->pub.buffer = & source->pixrow; |
402 | source->pub.buffer_height = 1; | 402 | source->pub.buffer_height = 1; |
403 | } else { | 403 | } else { |
404 | /* Need to translate anyway, so make a separate sample buffer. */ | 404 | /* Need to translate anyway, so make a separate sample buffer. */ |
405 | source->pub.buffer = (*cinfo->mem->alloc_sarray) | 405 | source->pub.buffer = (*cinfo->mem->alloc_sarray) |
406 | ((j_common_ptr) cinfo, JPOOL_IMAGE, | 406 | ((j_common_ptr) cinfo, JPOOL_IMAGE, |
407 | (JDIMENSION) w * cinfo->input_components, (JDIMENSION) 1); | 407 | (JDIMENSION) w * cinfo->input_components, (JDIMENSION) 1); |
408 | source->pub.buffer_height = 1; | 408 | source->pub.buffer_height = 1; |
409 | } | 409 | } |
410 | 410 | ||
411 | /* Compute the rescaling array if required. */ | 411 | /* Compute the rescaling array if required. */ |
412 | if (need_rescale) { | 412 | if (need_rescale) { |
413 | INT32 val, half_maxval; | 413 | INT32 val, half_maxval; |
414 | 414 | ||
415 | /* On 16-bit-int machines we have to be careful of maxval = 65535 */ | 415 | /* On 16-bit-int machines we have to be careful of maxval = 65535 */ |
416 | source->rescale = (JSAMPLE *) | 416 | source->rescale = (JSAMPLE *) |
417 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 417 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
418 | (size_t) (((long) maxval + 1L) * SIZEOF(JSAMPLE))); | 418 | (size_t) (((long) maxval + 1L) * SIZEOF(JSAMPLE))); |
419 | half_maxval = maxval / 2; | 419 | half_maxval = maxval / 2; |
420 | for (val = 0; val <= (INT32) maxval; val++) { | 420 | for (val = 0; val <= (INT32) maxval; val++) { |
421 | /* The multiplication here must be done in 32 bits to avoid overflow */ | 421 | /* The multiplication here must be done in 32 bits to avoid overflow */ |
422 | source->rescale[val] = (JSAMPLE) ((val*MAXJSAMPLE + half_maxval)/maxval); | 422 | source->rescale[val] = (JSAMPLE) ((val*MAXJSAMPLE + half_maxval)/maxval); |
423 | } | 423 | } |
424 | } | 424 | } |
425 | } | 425 | } |
426 | 426 | ||
427 | 427 | ||
428 | /* | 428 | /* |
429 | * Finish up at the end of the file. | 429 | * Finish up at the end of the file. |
430 | */ | 430 | */ |
431 | 431 | ||
432 | METHODDEF(void) | 432 | METHODDEF(void) |
433 | finish_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) | 433 | finish_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo) |
434 | { | 434 | { |
435 | /* no work */ | 435 | /* no work */ |
436 | } | 436 | } |
437 | 437 | ||
438 | 438 | ||
439 | /* | 439 | /* |
440 | * The module selection routine for PPM format input. | 440 | * The module selection routine for PPM format input. |
441 | */ | 441 | */ |
442 | 442 | ||
443 | GLOBAL(cjpeg_source_ptr) | 443 | GLOBAL(cjpeg_source_ptr) |
444 | jinit_read_ppm (j_compress_ptr cinfo) | 444 | jinit_read_ppm (j_compress_ptr cinfo) |
445 | { | 445 | { |
446 | ppm_source_ptr source; | 446 | ppm_source_ptr source; |
447 | 447 | ||
448 | /* Create module interface object */ | 448 | /* Create module interface object */ |
449 | source = (ppm_source_ptr) | 449 | source = (ppm_source_ptr) |
450 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 450 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
451 | SIZEOF(ppm_source_struct)); | 451 | SIZEOF(ppm_source_struct)); |
452 | /* Fill in method ptrs, except get_pixel_rows which start_input sets */ | 452 | /* Fill in method ptrs, except get_pixel_rows which start_input sets */ |
453 | source->pub.start_input = start_input_ppm; | 453 | source->pub.start_input = start_input_ppm; |
454 | source->pub.finish_input = finish_input_ppm; | 454 | source->pub.finish_input = finish_input_ppm; |
455 | 455 | ||
456 | return (cjpeg_source_ptr) source; | 456 | return (cjpeg_source_ptr) source; |
457 | } | 457 | } |
458 | 458 | ||
459 | #endif /* PPM_SUPPORTED */ | 459 | #endif /* PPM_SUPPORTED */ |