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-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapimin.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapimin.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapimin.c new file mode 100644 index 0000000..65f8a49 --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapimin.c | |||
@@ -0,0 +1,396 @@ | |||
1 | /* | ||
2 | * jdapimin.c | ||
3 | * | ||
4 | * Copyright (C) 1994-1998, Thomas G. Lane. | ||
5 | * Modified 2009 by Guido Vollbeding. | ||
6 | * This file is part of the Independent JPEG Group's software. | ||
7 | * For conditions of distribution and use, see the accompanying README file. | ||
8 | * | ||
9 | * This file contains application interface code for the decompression half | ||
10 | * of the JPEG library. These are the "minimum" API routines that may be | ||
11 | * needed in either the normal full-decompression case or the | ||
12 | * transcoding-only case. | ||
13 | * | ||
14 | * Most of the routines intended to be called directly by an application | ||
15 | * are in this file or in jdapistd.c. But also see jcomapi.c for routines | ||
16 | * shared by compression and decompression, and jdtrans.c for the transcoding | ||
17 | * case. | ||
18 | */ | ||
19 | |||
20 | #define JPEG_INTERNALS | ||
21 | #include "jinclude.h" | ||
22 | #include "jpeglib.h" | ||
23 | |||
24 | |||
25 | /* | ||
26 | * Initialization of a JPEG decompression object. | ||
27 | * The error manager must already be set up (in case memory manager fails). | ||
28 | */ | ||
29 | |||
30 | GLOBAL(void) | ||
31 | jpeg_CreateDecompress (j_decompress_ptr cinfo, int version, size_t structsize) | ||
32 | { | ||
33 | int i; | ||
34 | |||
35 | /* Guard against version mismatches between library and caller. */ | ||
36 | cinfo->mem = NULL; /* so jpeg_destroy knows mem mgr not called */ | ||
37 | if (version != JPEG_LIB_VERSION) | ||
38 | ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version); | ||
39 | if (structsize != SIZEOF(struct jpeg_decompress_struct)) | ||
40 | ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, | ||
41 | (int) SIZEOF(struct jpeg_decompress_struct), (int) structsize); | ||
42 | |||
43 | /* For debugging purposes, we zero the whole master structure. | ||
44 | * But the application has already set the err pointer, and may have set | ||
45 | * client_data, so we have to save and restore those fields. | ||
46 | * Note: if application hasn't set client_data, tools like Purify may | ||
47 | * complain here. | ||
48 | */ | ||
49 | { | ||
50 | struct jpeg_error_mgr * err = cinfo->err; | ||
51 | void * client_data = cinfo->client_data; /* ignore Purify complaint here */ | ||
52 | MEMZERO(cinfo, SIZEOF(struct jpeg_decompress_struct)); | ||
53 | cinfo->err = err; | ||
54 | cinfo->client_data = client_data; | ||
55 | } | ||
56 | cinfo->is_decompressor = TRUE; | ||
57 | |||
58 | /* Initialize a memory manager instance for this object */ | ||
59 | jinit_memory_mgr((j_common_ptr) cinfo); | ||
60 | |||
61 | /* Zero out pointers to permanent structures. */ | ||
62 | cinfo->progress = NULL; | ||
63 | cinfo->src = NULL; | ||
64 | |||
65 | for (i = 0; i < NUM_QUANT_TBLS; i++) | ||
66 | cinfo->quant_tbl_ptrs[i] = NULL; | ||
67 | |||
68 | for (i = 0; i < NUM_HUFF_TBLS; i++) { | ||
69 | cinfo->dc_huff_tbl_ptrs[i] = NULL; | ||
70 | cinfo->ac_huff_tbl_ptrs[i] = NULL; | ||
71 | } | ||
72 | |||
73 | /* Initialize marker processor so application can override methods | ||
74 | * for COM, APPn markers before calling jpeg_read_header. | ||
75 | */ | ||
76 | cinfo->marker_list = NULL; | ||
77 | jinit_marker_reader(cinfo); | ||
78 | |||
79 | /* And initialize the overall input controller. */ | ||
80 | jinit_input_controller(cinfo); | ||
81 | |||
82 | /* OK, I'm ready */ | ||
83 | cinfo->global_state = DSTATE_START; | ||
84 | } | ||
85 | |||
86 | |||
87 | /* | ||
88 | * Destruction of a JPEG decompression object | ||
89 | */ | ||
90 | |||
91 | GLOBAL(void) | ||
92 | jpeg_destroy_decompress (j_decompress_ptr cinfo) | ||
93 | { | ||
94 | jpeg_destroy((j_common_ptr) cinfo); /* use common routine */ | ||
95 | } | ||
96 | |||
97 | |||
98 | /* | ||
99 | * Abort processing of a JPEG decompression operation, | ||
100 | * but don't destroy the object itself. | ||
101 | */ | ||
102 | |||
103 | GLOBAL(void) | ||
104 | jpeg_abort_decompress (j_decompress_ptr cinfo) | ||
105 | { | ||
106 | jpeg_abort((j_common_ptr) cinfo); /* use common routine */ | ||
107 | } | ||
108 | |||
109 | |||
110 | /* | ||
111 | * Set default decompression parameters. | ||
112 | */ | ||
113 | |||
114 | LOCAL(void) | ||
115 | default_decompress_parms (j_decompress_ptr cinfo) | ||
116 | { | ||
117 | /* Guess the input colorspace, and set output colorspace accordingly. */ | ||
118 | /* (Wish JPEG committee had provided a real way to specify this...) */ | ||
119 | /* Note application may override our guesses. */ | ||
120 | switch (cinfo->num_components) { | ||
121 | case 1: | ||
122 | cinfo->jpeg_color_space = JCS_GRAYSCALE; | ||
123 | cinfo->out_color_space = JCS_GRAYSCALE; | ||
124 | break; | ||
125 | |||
126 | case 3: | ||
127 | if (cinfo->saw_JFIF_marker) { | ||
128 | cinfo->jpeg_color_space = JCS_YCbCr; /* JFIF implies YCbCr */ | ||
129 | } else if (cinfo->saw_Adobe_marker) { | ||
130 | switch (cinfo->Adobe_transform) { | ||
131 | case 0: | ||
132 | cinfo->jpeg_color_space = JCS_RGB; | ||
133 | break; | ||
134 | case 1: | ||
135 | cinfo->jpeg_color_space = JCS_YCbCr; | ||
136 | break; | ||
137 | default: | ||
138 | WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform); | ||
139 | cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */ | ||
140 | break; | ||
141 | } | ||
142 | } else { | ||
143 | /* Saw no special markers, try to guess from the component IDs */ | ||
144 | int cid0 = cinfo->comp_info[0].component_id; | ||
145 | int cid1 = cinfo->comp_info[1].component_id; | ||
146 | int cid2 = cinfo->comp_info[2].component_id; | ||
147 | |||
148 | if (cid0 == 1 && cid1 == 2 && cid2 == 3) | ||
149 | cinfo->jpeg_color_space = JCS_YCbCr; /* assume JFIF w/out marker */ | ||
150 | else if (cid0 == 82 && cid1 == 71 && cid2 == 66) | ||
151 | cinfo->jpeg_color_space = JCS_RGB; /* ASCII 'R', 'G', 'B' */ | ||
152 | else { | ||
153 | TRACEMS3(cinfo, 1, JTRC_UNKNOWN_IDS, cid0, cid1, cid2); | ||
154 | cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */ | ||
155 | } | ||
156 | } | ||
157 | /* Always guess RGB is proper output colorspace. */ | ||
158 | cinfo->out_color_space = JCS_RGB; | ||
159 | break; | ||
160 | |||
161 | case 4: | ||
162 | if (cinfo->saw_Adobe_marker) { | ||
163 | switch (cinfo->Adobe_transform) { | ||
164 | case 0: | ||
165 | cinfo->jpeg_color_space = JCS_CMYK; | ||
166 | break; | ||
167 | case 2: | ||
168 | cinfo->jpeg_color_space = JCS_YCCK; | ||
169 | break; | ||
170 | default: | ||
171 | WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform); | ||
172 | cinfo->jpeg_color_space = JCS_YCCK; /* assume it's YCCK */ | ||
173 | break; | ||
174 | } | ||
175 | } else { | ||
176 | /* No special markers, assume straight CMYK. */ | ||
177 | cinfo->jpeg_color_space = JCS_CMYK; | ||
178 | } | ||
179 | cinfo->out_color_space = JCS_CMYK; | ||
180 | break; | ||
181 | |||
182 | default: | ||
183 | cinfo->jpeg_color_space = JCS_UNKNOWN; | ||
184 | cinfo->out_color_space = JCS_UNKNOWN; | ||
185 | break; | ||
186 | } | ||
187 | |||
188 | /* Set defaults for other decompression parameters. */ | ||
189 | cinfo->scale_num = cinfo->block_size; /* 1:1 scaling */ | ||
190 | cinfo->scale_denom = cinfo->block_size; | ||
191 | cinfo->output_gamma = 1.0; | ||
192 | cinfo->buffered_image = FALSE; | ||
193 | cinfo->raw_data_out = FALSE; | ||
194 | cinfo->dct_method = JDCT_DEFAULT; | ||
195 | cinfo->do_fancy_upsampling = TRUE; | ||
196 | cinfo->do_block_smoothing = TRUE; | ||
197 | cinfo->quantize_colors = FALSE; | ||
198 | /* We set these in case application only sets quantize_colors. */ | ||
199 | cinfo->dither_mode = JDITHER_FS; | ||
200 | #ifdef QUANT_2PASS_SUPPORTED | ||
201 | cinfo->two_pass_quantize = TRUE; | ||
202 | #else | ||
203 | cinfo->two_pass_quantize = FALSE; | ||
204 | #endif | ||
205 | cinfo->desired_number_of_colors = 256; | ||
206 | cinfo->colormap = NULL; | ||
207 | /* Initialize for no mode change in buffered-image mode. */ | ||
208 | cinfo->enable_1pass_quant = FALSE; | ||
209 | cinfo->enable_external_quant = FALSE; | ||
210 | cinfo->enable_2pass_quant = FALSE; | ||
211 | } | ||
212 | |||
213 | |||
214 | /* | ||
215 | * Decompression startup: read start of JPEG datastream to see what's there. | ||
216 | * Need only initialize JPEG object and supply a data source before calling. | ||
217 | * | ||
218 | * This routine will read as far as the first SOS marker (ie, actual start of | ||
219 | * compressed data), and will save all tables and parameters in the JPEG | ||
220 | * object. It will also initialize the decompression parameters to default | ||
221 | * values, and finally return JPEG_HEADER_OK. On return, the application may | ||
222 | * adjust the decompression parameters and then call jpeg_start_decompress. | ||
223 | * (Or, if the application only wanted to determine the image parameters, | ||
224 | * the data need not be decompressed. In that case, call jpeg_abort or | ||
225 | * jpeg_destroy to release any temporary space.) | ||
226 | * If an abbreviated (tables only) datastream is presented, the routine will | ||
227 | * return JPEG_HEADER_TABLES_ONLY upon reaching EOI. The application may then | ||
228 | * re-use the JPEG object to read the abbreviated image datastream(s). | ||
229 | * It is unnecessary (but OK) to call jpeg_abort in this case. | ||
230 | * The JPEG_SUSPENDED return code only occurs if the data source module | ||
231 | * requests suspension of the decompressor. In this case the application | ||
232 | * should load more source data and then re-call jpeg_read_header to resume | ||
233 | * processing. | ||
234 | * If a non-suspending data source is used and require_image is TRUE, then the | ||
235 | * return code need not be inspected since only JPEG_HEADER_OK is possible. | ||
236 | * | ||
237 | * This routine is now just a front end to jpeg_consume_input, with some | ||
238 | * extra error checking. | ||
239 | */ | ||
240 | |||
241 | GLOBAL(int) | ||
242 | jpeg_read_header (j_decompress_ptr cinfo, boolean require_image) | ||
243 | { | ||
244 | int retcode; | ||
245 | |||
246 | if (cinfo->global_state != DSTATE_START && | ||
247 | cinfo->global_state != DSTATE_INHEADER) | ||
248 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
249 | |||
250 | retcode = jpeg_consume_input(cinfo); | ||
251 | |||
252 | switch (retcode) { | ||
253 | case JPEG_REACHED_SOS: | ||
254 | retcode = JPEG_HEADER_OK; | ||
255 | break; | ||
256 | case JPEG_REACHED_EOI: | ||
257 | if (require_image) /* Complain if application wanted an image */ | ||
258 | ERREXIT(cinfo, JERR_NO_IMAGE); | ||
259 | /* Reset to start state; it would be safer to require the application to | ||
260 | * call jpeg_abort, but we can't change it now for compatibility reasons. | ||
261 | * A side effect is to free any temporary memory (there shouldn't be any). | ||
262 | */ | ||
263 | jpeg_abort((j_common_ptr) cinfo); /* sets state = DSTATE_START */ | ||
264 | retcode = JPEG_HEADER_TABLES_ONLY; | ||
265 | break; | ||
266 | case JPEG_SUSPENDED: | ||
267 | /* no work */ | ||
268 | break; | ||
269 | } | ||
270 | |||
271 | return retcode; | ||
272 | } | ||
273 | |||
274 | |||
275 | /* | ||
276 | * Consume data in advance of what the decompressor requires. | ||
277 | * This can be called at any time once the decompressor object has | ||
278 | * been created and a data source has been set up. | ||
279 | * | ||
280 | * This routine is essentially a state machine that handles a couple | ||
281 | * of critical state-transition actions, namely initial setup and | ||
282 | * transition from header scanning to ready-for-start_decompress. | ||
283 | * All the actual input is done via the input controller's consume_input | ||
284 | * method. | ||
285 | */ | ||
286 | |||
287 | GLOBAL(int) | ||
288 | jpeg_consume_input (j_decompress_ptr cinfo) | ||
289 | { | ||
290 | int retcode = JPEG_SUSPENDED; | ||
291 | |||
292 | /* NB: every possible DSTATE value should be listed in this switch */ | ||
293 | switch (cinfo->global_state) { | ||
294 | case DSTATE_START: | ||
295 | /* Start-of-datastream actions: reset appropriate modules */ | ||
296 | (*cinfo->inputctl->reset_input_controller) (cinfo); | ||
297 | /* Initialize application's data source module */ | ||
298 | (*cinfo->src->init_source) (cinfo); | ||
299 | cinfo->global_state = DSTATE_INHEADER; | ||
300 | /*FALLTHROUGH*/ | ||
301 | case DSTATE_INHEADER: | ||
302 | retcode = (*cinfo->inputctl->consume_input) (cinfo); | ||
303 | if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */ | ||
304 | /* Set up default parameters based on header data */ | ||
305 | default_decompress_parms(cinfo); | ||
306 | /* Set global state: ready for start_decompress */ | ||
307 | cinfo->global_state = DSTATE_READY; | ||
308 | } | ||
309 | break; | ||
310 | case DSTATE_READY: | ||
311 | /* Can't advance past first SOS until start_decompress is called */ | ||
312 | retcode = JPEG_REACHED_SOS; | ||
313 | break; | ||
314 | case DSTATE_PRELOAD: | ||
315 | case DSTATE_PRESCAN: | ||
316 | case DSTATE_SCANNING: | ||
317 | case DSTATE_RAW_OK: | ||
318 | case DSTATE_BUFIMAGE: | ||
319 | case DSTATE_BUFPOST: | ||
320 | case DSTATE_STOPPING: | ||
321 | retcode = (*cinfo->inputctl->consume_input) (cinfo); | ||
322 | break; | ||
323 | default: | ||
324 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
325 | } | ||
326 | return retcode; | ||
327 | } | ||
328 | |||
329 | |||
330 | /* | ||
331 | * Have we finished reading the input file? | ||
332 | */ | ||
333 | |||
334 | GLOBAL(boolean) | ||
335 | jpeg_input_complete (j_decompress_ptr cinfo) | ||
336 | { | ||
337 | /* Check for valid jpeg object */ | ||
338 | if (cinfo->global_state < DSTATE_START || | ||
339 | cinfo->global_state > DSTATE_STOPPING) | ||
340 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
341 | return cinfo->inputctl->eoi_reached; | ||
342 | } | ||
343 | |||
344 | |||
345 | /* | ||
346 | * Is there more than one scan? | ||
347 | */ | ||
348 | |||
349 | GLOBAL(boolean) | ||
350 | jpeg_has_multiple_scans (j_decompress_ptr cinfo) | ||
351 | { | ||
352 | /* Only valid after jpeg_read_header completes */ | ||
353 | if (cinfo->global_state < DSTATE_READY || | ||
354 | cinfo->global_state > DSTATE_STOPPING) | ||
355 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
356 | return cinfo->inputctl->has_multiple_scans; | ||
357 | } | ||
358 | |||
359 | |||
360 | /* | ||
361 | * Finish JPEG decompression. | ||
362 | * | ||
363 | * This will normally just verify the file trailer and release temp storage. | ||
364 | * | ||
365 | * Returns FALSE if suspended. The return value need be inspected only if | ||
366 | * a suspending data source is used. | ||
367 | */ | ||
368 | |||
369 | GLOBAL(boolean) | ||
370 | jpeg_finish_decompress (j_decompress_ptr cinfo) | ||
371 | { | ||
372 | if ((cinfo->global_state == DSTATE_SCANNING || | ||
373 | cinfo->global_state == DSTATE_RAW_OK) && ! cinfo->buffered_image) { | ||
374 | /* Terminate final pass of non-buffered mode */ | ||
375 | if (cinfo->output_scanline < cinfo->output_height) | ||
376 | ERREXIT(cinfo, JERR_TOO_LITTLE_DATA); | ||
377 | (*cinfo->master->finish_output_pass) (cinfo); | ||
378 | cinfo->global_state = DSTATE_STOPPING; | ||
379 | } else if (cinfo->global_state == DSTATE_BUFIMAGE) { | ||
380 | /* Finishing after a buffered-image operation */ | ||
381 | cinfo->global_state = DSTATE_STOPPING; | ||
382 | } else if (cinfo->global_state != DSTATE_STOPPING) { | ||
383 | /* STOPPING = repeat call after a suspension, anything else is error */ | ||
384 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
385 | } | ||
386 | /* Read until EOI */ | ||
387 | while (! cinfo->inputctl->eoi_reached) { | ||
388 | if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED) | ||
389 | return FALSE; /* Suspend, come back later */ | ||
390 | } | ||
391 | /* Do final cleanup */ | ||
392 | (*cinfo->src->term_source) (cinfo); | ||
393 | /* We can use jpeg_abort to release memory and reset global_state */ | ||
394 | jpeg_abort((j_common_ptr) cinfo); | ||
395 | return TRUE; | ||
396 | } | ||