diff options
author | David Walter Seikel | 2013-01-13 17:24:39 +1000 |
---|---|---|
committer | David Walter Seikel | 2013-01-13 17:24:39 +1000 |
commit | 393b5cd1dc438872af89d334ef6e5fcc59f27d47 (patch) | |
tree | 6a14521219942a08a1b95cb2f5a923a9edd60f63 /libraries/irrlicht-1.8/source/Irrlicht/libpng/contrib/pngminus/png2pnm.c | |
parent | Add a note about rasters suggested start up code. (diff) | |
download | SledjHamr-393b5cd1dc438872af89d334ef6e5fcc59f27d47.zip SledjHamr-393b5cd1dc438872af89d334ef6e5fcc59f27d47.tar.gz SledjHamr-393b5cd1dc438872af89d334ef6e5fcc59f27d47.tar.bz2 SledjHamr-393b5cd1dc438872af89d334ef6e5fcc59f27d47.tar.xz |
Added Irrlicht 1.8, but without all the Windows binaries.
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/libpng/contrib/pngminus/png2pnm.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/libpng/contrib/pngminus/png2pnm.c | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/libpng/contrib/pngminus/png2pnm.c b/libraries/irrlicht-1.8/source/Irrlicht/libpng/contrib/pngminus/png2pnm.c new file mode 100644 index 0000000..ef28d90 --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/libpng/contrib/pngminus/png2pnm.c | |||
@@ -0,0 +1,430 @@ | |||
1 | /* | ||
2 | * png2pnm.c --- conversion from PNG-file to PGM/PPM-file | ||
3 | * copyright (C) 1999 by Willem van Schaik <willem@schaik.com> | ||
4 | * | ||
5 | * version 1.0 - 1999.10.15 - First version. | ||
6 | * | ||
7 | * Permission to use, copy, modify, and distribute this software and | ||
8 | * its documentation for any purpose and without fee is hereby granted, | ||
9 | * provided that the above copyright notice appear in all copies and | ||
10 | * that both that copyright notice and this permission notice appear in | ||
11 | * supporting documentation. This software is provided "as is" without | ||
12 | * express or implied warranty. | ||
13 | */ | ||
14 | |||
15 | #include <stdio.h> | ||
16 | #include <stdlib.h> | ||
17 | #ifdef __TURBOC__ | ||
18 | #include <mem.h> | ||
19 | #include <fcntl.h> | ||
20 | #endif | ||
21 | |||
22 | #ifndef BOOL | ||
23 | #define BOOL unsigned char | ||
24 | #endif | ||
25 | #ifndef TRUE | ||
26 | #define TRUE (BOOL) 1 | ||
27 | #endif | ||
28 | #ifndef FALSE | ||
29 | #define FALSE (BOOL) 0 | ||
30 | #endif | ||
31 | |||
32 | #ifdef __TURBOC__ | ||
33 | #define STDIN 0 | ||
34 | #define STDOUT 1 | ||
35 | #define STDERR 2 | ||
36 | #endif | ||
37 | |||
38 | /* to make png2pnm verbose so we can find problems (needs to be before png.h) */ | ||
39 | #ifndef PNG_DEBUG | ||
40 | #define PNG_DEBUG 0 | ||
41 | #endif | ||
42 | |||
43 | #include "png.h" | ||
44 | |||
45 | /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ | ||
46 | #ifndef png_jmpbuf | ||
47 | # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) | ||
48 | #endif | ||
49 | |||
50 | /* function prototypes */ | ||
51 | |||
52 | int main (int argc, char *argv[]); | ||
53 | void usage (); | ||
54 | BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha); | ||
55 | |||
56 | /* | ||
57 | * main | ||
58 | */ | ||
59 | |||
60 | int main(int argc, char *argv[]) | ||
61 | { | ||
62 | FILE *fp_rd = stdin; | ||
63 | FILE *fp_wr = stdout; | ||
64 | FILE *fp_al = NULL; | ||
65 | BOOL raw = TRUE; | ||
66 | BOOL alpha = FALSE; | ||
67 | int argi; | ||
68 | |||
69 | for (argi = 1; argi < argc; argi++) | ||
70 | { | ||
71 | if (argv[argi][0] == '-') | ||
72 | { | ||
73 | switch (argv[argi][1]) | ||
74 | { | ||
75 | case 'n': | ||
76 | raw = FALSE; | ||
77 | break; | ||
78 | case 'r': | ||
79 | raw = TRUE; | ||
80 | break; | ||
81 | case 'a': | ||
82 | alpha = TRUE; | ||
83 | argi++; | ||
84 | if ((fp_al = fopen (argv[argi], "wb")) == NULL) | ||
85 | { | ||
86 | fprintf (stderr, "PNM2PNG\n"); | ||
87 | fprintf (stderr, "Error: can not create alpha-channel file %s\n", argv[argi]); | ||
88 | exit (1); | ||
89 | } | ||
90 | break; | ||
91 | case 'h': | ||
92 | case '?': | ||
93 | usage(); | ||
94 | exit(0); | ||
95 | break; | ||
96 | default: | ||
97 | fprintf (stderr, "PNG2PNM\n"); | ||
98 | fprintf (stderr, "Error: unknown option %s\n", argv[argi]); | ||
99 | usage(); | ||
100 | exit(1); | ||
101 | break; | ||
102 | } /* end switch */ | ||
103 | } | ||
104 | else if (fp_rd == stdin) | ||
105 | { | ||
106 | if ((fp_rd = fopen (argv[argi], "rb")) == NULL) | ||
107 | { | ||
108 | fprintf (stderr, "PNG2PNM\n"); | ||
109 | fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); | ||
110 | exit (1); | ||
111 | } | ||
112 | } | ||
113 | else if (fp_wr == stdout) | ||
114 | { | ||
115 | if ((fp_wr = fopen (argv[argi], "wb")) == NULL) | ||
116 | { | ||
117 | fprintf (stderr, "PNG2PNM\n"); | ||
118 | fprintf (stderr, "Error: can not create file %s\n", argv[argi]); | ||
119 | exit (1); | ||
120 | } | ||
121 | } | ||
122 | else | ||
123 | { | ||
124 | fprintf (stderr, "PNG2PNM\n"); | ||
125 | fprintf (stderr, "Error: too many parameters\n"); | ||
126 | usage(); | ||
127 | exit(1); | ||
128 | } | ||
129 | } /* end for */ | ||
130 | |||
131 | #ifdef __TURBOC__ | ||
132 | /* set stdin/stdout if required to binary */ | ||
133 | if (fp_rd == stdin) | ||
134 | { | ||
135 | setmode (STDIN, O_BINARY); | ||
136 | } | ||
137 | if ((raw) && (fp_wr == stdout)) | ||
138 | { | ||
139 | setmode (STDOUT, O_BINARY); | ||
140 | } | ||
141 | #endif | ||
142 | |||
143 | /* call the conversion program itself */ | ||
144 | if (png2pnm (fp_rd, fp_wr, fp_al, raw, alpha) == FALSE) | ||
145 | { | ||
146 | fprintf (stderr, "PNG2PNM\n"); | ||
147 | fprintf (stderr, "Error: unsuccessful conversion of PNG-image\n"); | ||
148 | exit(1); | ||
149 | } | ||
150 | |||
151 | /* close input file */ | ||
152 | fclose (fp_rd); | ||
153 | /* close output file */ | ||
154 | fclose (fp_wr); | ||
155 | /* close alpha file */ | ||
156 | if (alpha) | ||
157 | fclose (fp_al); | ||
158 | |||
159 | return 0; | ||
160 | } | ||
161 | |||
162 | /* | ||
163 | * usage | ||
164 | */ | ||
165 | |||
166 | void usage() | ||
167 | { | ||
168 | fprintf (stderr, "PNG2PNM\n"); | ||
169 | fprintf (stderr, " by Willem van Schaik, 1999\n"); | ||
170 | #ifdef __TURBOC__ | ||
171 | fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); | ||
172 | #else | ||
173 | fprintf (stderr, " for Linux (and Unix) compilers\n"); | ||
174 | #endif | ||
175 | fprintf (stderr, "Usage: png2pnm [options] <file>.png [<file>.pnm]\n"); | ||
176 | fprintf (stderr, " or: ... | png2pnm [options]\n"); | ||
177 | fprintf (stderr, "Options:\n"); | ||
178 | fprintf (stderr, " -r[aw] write pnm-file in binary format (P4/P5/P6) (default)\n"); | ||
179 | fprintf (stderr, " -n[oraw] write pnm-file in ascii format (P1/P2/P3)\n"); | ||
180 | fprintf (stderr, " -a[lpha] <file>.pgm write PNG alpha channel as pgm-file\n"); | ||
181 | fprintf (stderr, " -h | -? print this help-information\n"); | ||
182 | } | ||
183 | |||
184 | /* | ||
185 | * png2pnm | ||
186 | */ | ||
187 | |||
188 | BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha) | ||
189 | { | ||
190 | png_struct *png_ptr = NULL; | ||
191 | png_info *info_ptr = NULL; | ||
192 | png_byte buf[8]; | ||
193 | png_byte *png_pixels = NULL; | ||
194 | png_byte **row_pointers = NULL; | ||
195 | png_byte *pix_ptr = NULL; | ||
196 | png_uint_32 row_bytes; | ||
197 | |||
198 | png_uint_32 width; | ||
199 | png_uint_32 height; | ||
200 | int bit_depth; | ||
201 | int channels; | ||
202 | int color_type; | ||
203 | int alpha_present; | ||
204 | int row, col; | ||
205 | int ret; | ||
206 | int i; | ||
207 | long dep_16; | ||
208 | |||
209 | /* read and check signature in PNG file */ | ||
210 | ret = fread (buf, 1, 8, png_file); | ||
211 | if (ret != 8) | ||
212 | return FALSE; | ||
213 | |||
214 | ret = png_sig_cmp (buf, 0, 8); | ||
215 | if (ret) | ||
216 | return FALSE; | ||
217 | |||
218 | /* create png and info structures */ | ||
219 | |||
220 | png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, | ||
221 | NULL, NULL, NULL); | ||
222 | if (!png_ptr) | ||
223 | return FALSE; /* out of memory */ | ||
224 | |||
225 | info_ptr = png_create_info_struct (png_ptr); | ||
226 | if (!info_ptr) | ||
227 | { | ||
228 | png_destroy_read_struct (&png_ptr, NULL, NULL); | ||
229 | return FALSE; /* out of memory */ | ||
230 | } | ||
231 | |||
232 | if (setjmp (png_jmpbuf(png_ptr))) | ||
233 | { | ||
234 | png_destroy_read_struct (&png_ptr, &info_ptr, NULL); | ||
235 | return FALSE; | ||
236 | } | ||
237 | |||
238 | /* set up the input control for C streams */ | ||
239 | png_init_io (png_ptr, png_file); | ||
240 | png_set_sig_bytes (png_ptr, 8); /* we already read the 8 signature bytes */ | ||
241 | |||
242 | /* read the file information */ | ||
243 | png_read_info (png_ptr, info_ptr); | ||
244 | |||
245 | /* get size and bit-depth of the PNG-image */ | ||
246 | png_get_IHDR (png_ptr, info_ptr, | ||
247 | &width, &height, &bit_depth, &color_type, | ||
248 | NULL, NULL, NULL); | ||
249 | |||
250 | /* set-up the transformations */ | ||
251 | |||
252 | /* transform paletted images into full-color rgb */ | ||
253 | if (color_type == PNG_COLOR_TYPE_PALETTE) | ||
254 | png_set_expand (png_ptr); | ||
255 | /* expand images to bit-depth 8 (only applicable for grayscale images) */ | ||
256 | if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) | ||
257 | png_set_expand (png_ptr); | ||
258 | /* transform transparency maps into full alpha-channel */ | ||
259 | if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS)) | ||
260 | png_set_expand (png_ptr); | ||
261 | |||
262 | #ifdef NJET | ||
263 | /* downgrade 16-bit images to 8 bit */ | ||
264 | if (bit_depth == 16) | ||
265 | png_set_strip_16 (png_ptr); | ||
266 | /* transform grayscale images into full-color */ | ||
267 | if (color_type == PNG_COLOR_TYPE_GRAY || | ||
268 | color_type == PNG_COLOR_TYPE_GRAY_ALPHA) | ||
269 | png_set_gray_to_rgb (png_ptr); | ||
270 | /* only if file has a file gamma, we do a correction */ | ||
271 | if (png_get_gAMA (png_ptr, info_ptr, &file_gamma)) | ||
272 | png_set_gamma (png_ptr, (double) 2.2, file_gamma); | ||
273 | #endif | ||
274 | |||
275 | /* all transformations have been registered; now update info_ptr data, | ||
276 | * get rowbytes and channels, and allocate image memory */ | ||
277 | |||
278 | png_read_update_info (png_ptr, info_ptr); | ||
279 | |||
280 | /* get the new color-type and bit-depth (after expansion/stripping) */ | ||
281 | png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, | ||
282 | NULL, NULL, NULL); | ||
283 | |||
284 | /* check for 16-bit files */ | ||
285 | if (bit_depth == 16) | ||
286 | { | ||
287 | raw = FALSE; | ||
288 | #ifdef __TURBOC__ | ||
289 | pnm_file->flags &= ~((unsigned) _F_BIN); | ||
290 | #endif | ||
291 | } | ||
292 | |||
293 | /* calculate new number of channels and store alpha-presence */ | ||
294 | if (color_type == PNG_COLOR_TYPE_GRAY) | ||
295 | channels = 1; | ||
296 | else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) | ||
297 | channels = 2; | ||
298 | else if (color_type == PNG_COLOR_TYPE_RGB) | ||
299 | channels = 3; | ||
300 | else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) | ||
301 | channels = 4; | ||
302 | else | ||
303 | channels = 0; /* should never happen */ | ||
304 | alpha_present = (channels - 1) % 2; | ||
305 | |||
306 | /* check if alpha is expected to be present in file */ | ||
307 | if (alpha && !alpha_present) | ||
308 | { | ||
309 | fprintf (stderr, "PNG2PNM\n"); | ||
310 | fprintf (stderr, "Error: PNG-file doesn't contain alpha channel\n"); | ||
311 | exit (1); | ||
312 | } | ||
313 | |||
314 | /* row_bytes is the width x number of channels x (bit-depth / 8) */ | ||
315 | row_bytes = png_get_rowbytes (png_ptr, info_ptr); | ||
316 | |||
317 | if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL) { | ||
318 | png_destroy_read_struct (&png_ptr, &info_ptr, NULL); | ||
319 | return FALSE; | ||
320 | } | ||
321 | |||
322 | if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL) | ||
323 | { | ||
324 | png_destroy_read_struct (&png_ptr, &info_ptr, NULL); | ||
325 | free (png_pixels); | ||
326 | png_pixels = NULL; | ||
327 | return FALSE; | ||
328 | } | ||
329 | |||
330 | /* set the individual row_pointers to point at the correct offsets */ | ||
331 | for (i = 0; i < (height); i++) | ||
332 | row_pointers[i] = png_pixels + i * row_bytes; | ||
333 | |||
334 | /* now we can go ahead and just read the whole image */ | ||
335 | png_read_image (png_ptr, row_pointers); | ||
336 | |||
337 | /* read rest of file, and get additional chunks in info_ptr - REQUIRED */ | ||
338 | png_read_end (png_ptr, info_ptr); | ||
339 | |||
340 | /* clean up after the read, and free any memory allocated - REQUIRED */ | ||
341 | png_destroy_read_struct (&png_ptr, &info_ptr, (png_infopp) NULL); | ||
342 | |||
343 | /* write header of PNM file */ | ||
344 | |||
345 | if ((color_type == PNG_COLOR_TYPE_GRAY) || | ||
346 | (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) | ||
347 | { | ||
348 | fprintf (pnm_file, "%s\n", (raw) ? "P5" : "P2"); | ||
349 | fprintf (pnm_file, "%d %d\n", (int) width, (int) height); | ||
350 | fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); | ||
351 | } | ||
352 | else if ((color_type == PNG_COLOR_TYPE_RGB) || | ||
353 | (color_type == PNG_COLOR_TYPE_RGB_ALPHA)) | ||
354 | { | ||
355 | fprintf (pnm_file, "%s\n", (raw) ? "P6" : "P3"); | ||
356 | fprintf (pnm_file, "%d %d\n", (int) width, (int) height); | ||
357 | fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); | ||
358 | } | ||
359 | |||
360 | /* write header of PGM file with alpha channel */ | ||
361 | |||
362 | if ((alpha) && | ||
363 | ((color_type == PNG_COLOR_TYPE_GRAY_ALPHA) || | ||
364 | (color_type == PNG_COLOR_TYPE_RGB_ALPHA))) | ||
365 | { | ||
366 | fprintf (alpha_file, "%s\n", (raw) ? "P5" : "P2"); | ||
367 | fprintf (alpha_file, "%d %d\n", (int) width, (int) height); | ||
368 | fprintf (alpha_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); | ||
369 | } | ||
370 | |||
371 | /* write data to PNM file */ | ||
372 | pix_ptr = png_pixels; | ||
373 | |||
374 | for (row = 0; row < height; row++) | ||
375 | { | ||
376 | for (col = 0; col < width; col++) | ||
377 | { | ||
378 | for (i = 0; i < (channels - alpha_present); i++) | ||
379 | { | ||
380 | if (raw) | ||
381 | fputc ((int) *pix_ptr++ , pnm_file); | ||
382 | else | ||
383 | if (bit_depth == 16){ | ||
384 | dep_16 = (long) *pix_ptr++; | ||
385 | fprintf (pnm_file, "%ld ", (dep_16 << 8) + ((long) *pix_ptr++)); | ||
386 | } | ||
387 | else | ||
388 | fprintf (pnm_file, "%ld ", (long) *pix_ptr++); | ||
389 | } | ||
390 | if (alpha_present) | ||
391 | { | ||
392 | if (!alpha) | ||
393 | { | ||
394 | pix_ptr++; /* alpha */ | ||
395 | if (bit_depth == 16) | ||
396 | pix_ptr++; | ||
397 | } | ||
398 | else /* output alpha-channel as pgm file */ | ||
399 | { | ||
400 | if (raw) | ||
401 | fputc ((int) *pix_ptr++ , alpha_file); | ||
402 | else | ||
403 | if (bit_depth == 16){ | ||
404 | dep_16 = (long) *pix_ptr++; | ||
405 | fprintf (alpha_file, "%ld ", (dep_16 << 8) + (long) *pix_ptr++); | ||
406 | } | ||
407 | else | ||
408 | fprintf (alpha_file, "%ld ", (long) *pix_ptr++); | ||
409 | } | ||
410 | } /* if alpha_present */ | ||
411 | |||
412 | if (!raw) | ||
413 | if (col % 4 == 3) | ||
414 | fprintf (pnm_file, "\n"); | ||
415 | } /* end for col */ | ||
416 | |||
417 | if (!raw) | ||
418 | if (col % 4 != 0) | ||
419 | fprintf (pnm_file, "\n"); | ||
420 | } /* end for row */ | ||
421 | |||
422 | if (row_pointers != (unsigned char**) NULL) | ||
423 | free (row_pointers); | ||
424 | if (png_pixels != (unsigned char*) NULL) | ||
425 | free (png_pixels); | ||
426 | |||
427 | return TRUE; | ||
428 | |||
429 | } /* end of source */ | ||
430 | |||