diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapistd.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapistd.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapistd.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapistd.c new file mode 100644 index 0000000..e81bd67 --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdapistd.c | |||
@@ -0,0 +1,275 @@ | |||
1 | /* | ||
2 | * jdapistd.c | ||
3 | * | ||
4 | * Copyright (C) 1994-1996, Thomas G. Lane. | ||
5 | * This file is part of the Independent JPEG Group's software. | ||
6 | * For conditions of distribution and use, see the accompanying README file. | ||
7 | * | ||
8 | * This file contains application interface code for the decompression half | ||
9 | * of the JPEG library. These are the "standard" API routines that are | ||
10 | * used in the normal full-decompression case. They are not used by a | ||
11 | * transcoding-only application. Note that if an application links in | ||
12 | * jpeg_start_decompress, it will end up linking in the entire decompressor. | ||
13 | * We thus must separate this file from jdapimin.c to avoid linking the | ||
14 | * whole decompression library into a transcoder. | ||
15 | */ | ||
16 | |||
17 | #define JPEG_INTERNALS | ||
18 | #include "jinclude.h" | ||
19 | #include "jpeglib.h" | ||
20 | |||
21 | |||
22 | /* Forward declarations */ | ||
23 | LOCAL(boolean) output_pass_setup JPP((j_decompress_ptr cinfo)); | ||
24 | |||
25 | |||
26 | /* | ||
27 | * Decompression initialization. | ||
28 | * jpeg_read_header must be completed before calling this. | ||
29 | * | ||
30 | * If a multipass operating mode was selected, this will do all but the | ||
31 | * last pass, and thus may take a great deal of time. | ||
32 | * | ||
33 | * Returns FALSE if suspended. The return value need be inspected only if | ||
34 | * a suspending data source is used. | ||
35 | */ | ||
36 | |||
37 | GLOBAL(boolean) | ||
38 | jpeg_start_decompress (j_decompress_ptr cinfo) | ||
39 | { | ||
40 | if (cinfo->global_state == DSTATE_READY) { | ||
41 | /* First call: initialize master control, select active modules */ | ||
42 | jinit_master_decompress(cinfo); | ||
43 | if (cinfo->buffered_image) { | ||
44 | /* No more work here; expecting jpeg_start_output next */ | ||
45 | cinfo->global_state = DSTATE_BUFIMAGE; | ||
46 | return TRUE; | ||
47 | } | ||
48 | cinfo->global_state = DSTATE_PRELOAD; | ||
49 | } | ||
50 | if (cinfo->global_state == DSTATE_PRELOAD) { | ||
51 | /* If file has multiple scans, absorb them all into the coef buffer */ | ||
52 | if (cinfo->inputctl->has_multiple_scans) { | ||
53 | #ifdef D_MULTISCAN_FILES_SUPPORTED | ||
54 | for (;;) { | ||
55 | int retcode; | ||
56 | /* Call progress monitor hook if present */ | ||
57 | if (cinfo->progress != NULL) | ||
58 | (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); | ||
59 | /* Absorb some more input */ | ||
60 | retcode = (*cinfo->inputctl->consume_input) (cinfo); | ||
61 | if (retcode == JPEG_SUSPENDED) | ||
62 | return FALSE; | ||
63 | if (retcode == JPEG_REACHED_EOI) | ||
64 | break; | ||
65 | /* Advance progress counter if appropriate */ | ||
66 | if (cinfo->progress != NULL && | ||
67 | (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) { | ||
68 | if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) { | ||
69 | /* jdmaster underestimated number of scans; ratchet up one scan */ | ||
70 | cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows; | ||
71 | } | ||
72 | } | ||
73 | } | ||
74 | #else | ||
75 | ERREXIT(cinfo, JERR_NOT_COMPILED); | ||
76 | #endif /* D_MULTISCAN_FILES_SUPPORTED */ | ||
77 | } | ||
78 | cinfo->output_scan_number = cinfo->input_scan_number; | ||
79 | } else if (cinfo->global_state != DSTATE_PRESCAN) | ||
80 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
81 | /* Perform any dummy output passes, and set up for the final pass */ | ||
82 | return output_pass_setup(cinfo); | ||
83 | } | ||
84 | |||
85 | |||
86 | /* | ||
87 | * Set up for an output pass, and perform any dummy pass(es) needed. | ||
88 | * Common subroutine for jpeg_start_decompress and jpeg_start_output. | ||
89 | * Entry: global_state = DSTATE_PRESCAN only if previously suspended. | ||
90 | * Exit: If done, returns TRUE and sets global_state for proper output mode. | ||
91 | * If suspended, returns FALSE and sets global_state = DSTATE_PRESCAN. | ||
92 | */ | ||
93 | |||
94 | LOCAL(boolean) | ||
95 | output_pass_setup (j_decompress_ptr cinfo) | ||
96 | { | ||
97 | if (cinfo->global_state != DSTATE_PRESCAN) { | ||
98 | /* First call: do pass setup */ | ||
99 | (*cinfo->master->prepare_for_output_pass) (cinfo); | ||
100 | cinfo->output_scanline = 0; | ||
101 | cinfo->global_state = DSTATE_PRESCAN; | ||
102 | } | ||
103 | /* Loop over any required dummy passes */ | ||
104 | while (cinfo->master->is_dummy_pass) { | ||
105 | #ifdef QUANT_2PASS_SUPPORTED | ||
106 | /* Crank through the dummy pass */ | ||
107 | while (cinfo->output_scanline < cinfo->output_height) { | ||
108 | JDIMENSION last_scanline; | ||
109 | /* Call progress monitor hook if present */ | ||
110 | if (cinfo->progress != NULL) { | ||
111 | cinfo->progress->pass_counter = (long) cinfo->output_scanline; | ||
112 | cinfo->progress->pass_limit = (long) cinfo->output_height; | ||
113 | (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); | ||
114 | } | ||
115 | /* Process some data */ | ||
116 | last_scanline = cinfo->output_scanline; | ||
117 | (*cinfo->main->process_data) (cinfo, (JSAMPARRAY) NULL, | ||
118 | &cinfo->output_scanline, (JDIMENSION) 0); | ||
119 | if (cinfo->output_scanline == last_scanline) | ||
120 | return FALSE; /* No progress made, must suspend */ | ||
121 | } | ||
122 | /* Finish up dummy pass, and set up for another one */ | ||
123 | (*cinfo->master->finish_output_pass) (cinfo); | ||
124 | (*cinfo->master->prepare_for_output_pass) (cinfo); | ||
125 | cinfo->output_scanline = 0; | ||
126 | #else | ||
127 | ERREXIT(cinfo, JERR_NOT_COMPILED); | ||
128 | #endif /* QUANT_2PASS_SUPPORTED */ | ||
129 | } | ||
130 | /* Ready for application to drive output pass through | ||
131 | * jpeg_read_scanlines or jpeg_read_raw_data. | ||
132 | */ | ||
133 | cinfo->global_state = cinfo->raw_data_out ? DSTATE_RAW_OK : DSTATE_SCANNING; | ||
134 | return TRUE; | ||
135 | } | ||
136 | |||
137 | |||
138 | /* | ||
139 | * Read some scanlines of data from the JPEG decompressor. | ||
140 | * | ||
141 | * The return value will be the number of lines actually read. | ||
142 | * This may be less than the number requested in several cases, | ||
143 | * including bottom of image, data source suspension, and operating | ||
144 | * modes that emit multiple scanlines at a time. | ||
145 | * | ||
146 | * Note: we warn about excess calls to jpeg_read_scanlines() since | ||
147 | * this likely signals an application programmer error. However, | ||
148 | * an oversize buffer (max_lines > scanlines remaining) is not an error. | ||
149 | */ | ||
150 | |||
151 | GLOBAL(JDIMENSION) | ||
152 | jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines, | ||
153 | JDIMENSION max_lines) | ||
154 | { | ||
155 | JDIMENSION row_ctr; | ||
156 | |||
157 | if (cinfo->global_state != DSTATE_SCANNING) | ||
158 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
159 | if (cinfo->output_scanline >= cinfo->output_height) { | ||
160 | WARNMS(cinfo, JWRN_TOO_MUCH_DATA); | ||
161 | return 0; | ||
162 | } | ||
163 | |||
164 | /* Call progress monitor hook if present */ | ||
165 | if (cinfo->progress != NULL) { | ||
166 | cinfo->progress->pass_counter = (long) cinfo->output_scanline; | ||
167 | cinfo->progress->pass_limit = (long) cinfo->output_height; | ||
168 | (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); | ||
169 | } | ||
170 | |||
171 | /* Process some data */ | ||
172 | row_ctr = 0; | ||
173 | (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, max_lines); | ||
174 | cinfo->output_scanline += row_ctr; | ||
175 | return row_ctr; | ||
176 | } | ||
177 | |||
178 | |||
179 | /* | ||
180 | * Alternate entry point to read raw data. | ||
181 | * Processes exactly one iMCU row per call, unless suspended. | ||
182 | */ | ||
183 | |||
184 | GLOBAL(JDIMENSION) | ||
185 | jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data, | ||
186 | JDIMENSION max_lines) | ||
187 | { | ||
188 | JDIMENSION lines_per_iMCU_row; | ||
189 | |||
190 | if (cinfo->global_state != DSTATE_RAW_OK) | ||
191 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
192 | if (cinfo->output_scanline >= cinfo->output_height) { | ||
193 | WARNMS(cinfo, JWRN_TOO_MUCH_DATA); | ||
194 | return 0; | ||
195 | } | ||
196 | |||
197 | /* Call progress monitor hook if present */ | ||
198 | if (cinfo->progress != NULL) { | ||
199 | cinfo->progress->pass_counter = (long) cinfo->output_scanline; | ||
200 | cinfo->progress->pass_limit = (long) cinfo->output_height; | ||
201 | (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); | ||
202 | } | ||
203 | |||
204 | /* Verify that at least one iMCU row can be returned. */ | ||
205 | lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_v_scaled_size; | ||
206 | if (max_lines < lines_per_iMCU_row) | ||
207 | ERREXIT(cinfo, JERR_BUFFER_SIZE); | ||
208 | |||
209 | /* Decompress directly into user's buffer. */ | ||
210 | if (! (*cinfo->coef->decompress_data) (cinfo, data)) | ||
211 | return 0; /* suspension forced, can do nothing more */ | ||
212 | |||
213 | /* OK, we processed one iMCU row. */ | ||
214 | cinfo->output_scanline += lines_per_iMCU_row; | ||
215 | return lines_per_iMCU_row; | ||
216 | } | ||
217 | |||
218 | |||
219 | /* Additional entry points for buffered-image mode. */ | ||
220 | |||
221 | #ifdef D_MULTISCAN_FILES_SUPPORTED | ||
222 | |||
223 | /* | ||
224 | * Initialize for an output pass in buffered-image mode. | ||
225 | */ | ||
226 | |||
227 | GLOBAL(boolean) | ||
228 | jpeg_start_output (j_decompress_ptr cinfo, int scan_number) | ||
229 | { | ||
230 | if (cinfo->global_state != DSTATE_BUFIMAGE && | ||
231 | cinfo->global_state != DSTATE_PRESCAN) | ||
232 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
233 | /* Limit scan number to valid range */ | ||
234 | if (scan_number <= 0) | ||
235 | scan_number = 1; | ||
236 | if (cinfo->inputctl->eoi_reached && | ||
237 | scan_number > cinfo->input_scan_number) | ||
238 | scan_number = cinfo->input_scan_number; | ||
239 | cinfo->output_scan_number = scan_number; | ||
240 | /* Perform any dummy output passes, and set up for the real pass */ | ||
241 | return output_pass_setup(cinfo); | ||
242 | } | ||
243 | |||
244 | |||
245 | /* | ||
246 | * Finish up after an output pass in buffered-image mode. | ||
247 | * | ||
248 | * Returns FALSE if suspended. The return value need be inspected only if | ||
249 | * a suspending data source is used. | ||
250 | */ | ||
251 | |||
252 | GLOBAL(boolean) | ||
253 | jpeg_finish_output (j_decompress_ptr cinfo) | ||
254 | { | ||
255 | if ((cinfo->global_state == DSTATE_SCANNING || | ||
256 | cinfo->global_state == DSTATE_RAW_OK) && cinfo->buffered_image) { | ||
257 | /* Terminate this pass. */ | ||
258 | /* We do not require the whole pass to have been completed. */ | ||
259 | (*cinfo->master->finish_output_pass) (cinfo); | ||
260 | cinfo->global_state = DSTATE_BUFPOST; | ||
261 | } else if (cinfo->global_state != DSTATE_BUFPOST) { | ||
262 | /* BUFPOST = repeat call after a suspension, anything else is error */ | ||
263 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); | ||
264 | } | ||
265 | /* Read markers looking for SOS or EOI */ | ||
266 | while (cinfo->input_scan_number <= cinfo->output_scan_number && | ||
267 | ! cinfo->inputctl->eoi_reached) { | ||
268 | if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED) | ||
269 | return FALSE; /* Suspend, come back later */ | ||
270 | } | ||
271 | cinfo->global_state = DSTATE_BUFIMAGE; | ||
272 | return TRUE; | ||
273 | } | ||
274 | |||
275 | #endif /* D_MULTISCAN_FILES_SUPPORTED */ | ||