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Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdpostct.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdpostct.c | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdpostct.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdpostct.c deleted file mode 100644 index 571563d..0000000 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdpostct.c +++ /dev/null | |||
@@ -1,290 +0,0 @@ | |||
1 | /* | ||
2 | * jdpostct.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 the decompression postprocessing controller. | ||
9 | * This controller manages the upsampling, color conversion, and color | ||
10 | * quantization/reduction steps; specifically, it controls the buffering | ||
11 | * between upsample/color conversion and color quantization/reduction. | ||
12 | * | ||
13 | * If no color quantization/reduction is required, then this module has no | ||
14 | * work to do, and it just hands off to the upsample/color conversion code. | ||
15 | * An integrated upsample/convert/quantize process would replace this module | ||
16 | * entirely. | ||
17 | */ | ||
18 | |||
19 | #define JPEG_INTERNALS | ||
20 | #include "jinclude.h" | ||
21 | #include "jpeglib.h" | ||
22 | |||
23 | |||
24 | /* Private buffer controller object */ | ||
25 | |||
26 | typedef struct { | ||
27 | struct jpeg_d_post_controller pub; /* public fields */ | ||
28 | |||
29 | /* Color quantization source buffer: this holds output data from | ||
30 | * the upsample/color conversion step to be passed to the quantizer. | ||
31 | * For two-pass color quantization, we need a full-image buffer; | ||
32 | * for one-pass operation, a strip buffer is sufficient. | ||
33 | */ | ||
34 | jvirt_sarray_ptr whole_image; /* virtual array, or NULL if one-pass */ | ||
35 | JSAMPARRAY buffer; /* strip buffer, or current strip of virtual */ | ||
36 | JDIMENSION strip_height; /* buffer size in rows */ | ||
37 | /* for two-pass mode only: */ | ||
38 | JDIMENSION starting_row; /* row # of first row in current strip */ | ||
39 | JDIMENSION next_row; /* index of next row to fill/empty in strip */ | ||
40 | } my_post_controller; | ||
41 | |||
42 | typedef my_post_controller * my_post_ptr; | ||
43 | |||
44 | |||
45 | /* Forward declarations */ | ||
46 | METHODDEF(void) post_process_1pass | ||
47 | JPP((j_decompress_ptr cinfo, | ||
48 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | ||
49 | JDIMENSION in_row_groups_avail, | ||
50 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | ||
51 | JDIMENSION out_rows_avail)); | ||
52 | #ifdef QUANT_2PASS_SUPPORTED | ||
53 | METHODDEF(void) post_process_prepass | ||
54 | JPP((j_decompress_ptr cinfo, | ||
55 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | ||
56 | JDIMENSION in_row_groups_avail, | ||
57 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | ||
58 | JDIMENSION out_rows_avail)); | ||
59 | METHODDEF(void) post_process_2pass | ||
60 | JPP((j_decompress_ptr cinfo, | ||
61 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | ||
62 | JDIMENSION in_row_groups_avail, | ||
63 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | ||
64 | JDIMENSION out_rows_avail)); | ||
65 | #endif | ||
66 | |||
67 | |||
68 | /* | ||
69 | * Initialize for a processing pass. | ||
70 | */ | ||
71 | |||
72 | METHODDEF(void) | ||
73 | start_pass_dpost (j_decompress_ptr cinfo, J_BUF_MODE pass_mode) | ||
74 | { | ||
75 | my_post_ptr post = (my_post_ptr) cinfo->post; | ||
76 | |||
77 | switch (pass_mode) { | ||
78 | case JBUF_PASS_THRU: | ||
79 | if (cinfo->quantize_colors) { | ||
80 | /* Single-pass processing with color quantization. */ | ||
81 | post->pub.post_process_data = post_process_1pass; | ||
82 | /* We could be doing buffered-image output before starting a 2-pass | ||
83 | * color quantization; in that case, jinit_d_post_controller did not | ||
84 | * allocate a strip buffer. Use the virtual-array buffer as workspace. | ||
85 | */ | ||
86 | if (post->buffer == NULL) { | ||
87 | post->buffer = (*cinfo->mem->access_virt_sarray) | ||
88 | ((j_common_ptr) cinfo, post->whole_image, | ||
89 | (JDIMENSION) 0, post->strip_height, TRUE); | ||
90 | } | ||
91 | } else { | ||
92 | /* For single-pass processing without color quantization, | ||
93 | * I have no work to do; just call the upsampler directly. | ||
94 | */ | ||
95 | post->pub.post_process_data = cinfo->upsample->upsample; | ||
96 | } | ||
97 | break; | ||
98 | #ifdef QUANT_2PASS_SUPPORTED | ||
99 | case JBUF_SAVE_AND_PASS: | ||
100 | /* First pass of 2-pass quantization */ | ||
101 | if (post->whole_image == NULL) | ||
102 | ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); | ||
103 | post->pub.post_process_data = post_process_prepass; | ||
104 | break; | ||
105 | case JBUF_CRANK_DEST: | ||
106 | /* Second pass of 2-pass quantization */ | ||
107 | if (post->whole_image == NULL) | ||
108 | ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); | ||
109 | post->pub.post_process_data = post_process_2pass; | ||
110 | break; | ||
111 | #endif /* QUANT_2PASS_SUPPORTED */ | ||
112 | default: | ||
113 | ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); | ||
114 | break; | ||
115 | } | ||
116 | post->starting_row = post->next_row = 0; | ||
117 | } | ||
118 | |||
119 | |||
120 | /* | ||
121 | * Process some data in the one-pass (strip buffer) case. | ||
122 | * This is used for color precision reduction as well as one-pass quantization. | ||
123 | */ | ||
124 | |||
125 | METHODDEF(void) | ||
126 | post_process_1pass (j_decompress_ptr cinfo, | ||
127 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | ||
128 | JDIMENSION in_row_groups_avail, | ||
129 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | ||
130 | JDIMENSION out_rows_avail) | ||
131 | { | ||
132 | my_post_ptr post = (my_post_ptr) cinfo->post; | ||
133 | JDIMENSION num_rows, max_rows; | ||
134 | |||
135 | /* Fill the buffer, but not more than what we can dump out in one go. */ | ||
136 | /* Note we rely on the upsampler to detect bottom of image. */ | ||
137 | max_rows = out_rows_avail - *out_row_ctr; | ||
138 | if (max_rows > post->strip_height) | ||
139 | max_rows = post->strip_height; | ||
140 | num_rows = 0; | ||
141 | (*cinfo->upsample->upsample) (cinfo, | ||
142 | input_buf, in_row_group_ctr, in_row_groups_avail, | ||
143 | post->buffer, &num_rows, max_rows); | ||
144 | /* Quantize and emit data. */ | ||
145 | (*cinfo->cquantize->color_quantize) (cinfo, | ||
146 | post->buffer, output_buf + *out_row_ctr, (int) num_rows); | ||
147 | *out_row_ctr += num_rows; | ||
148 | } | ||
149 | |||
150 | |||
151 | #ifdef QUANT_2PASS_SUPPORTED | ||
152 | |||
153 | /* | ||
154 | * Process some data in the first pass of 2-pass quantization. | ||
155 | */ | ||
156 | |||
157 | METHODDEF(void) | ||
158 | post_process_prepass (j_decompress_ptr cinfo, | ||
159 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | ||
160 | JDIMENSION in_row_groups_avail, | ||
161 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | ||
162 | JDIMENSION out_rows_avail) | ||
163 | { | ||
164 | my_post_ptr post = (my_post_ptr) cinfo->post; | ||
165 | JDIMENSION old_next_row, num_rows; | ||
166 | |||
167 | /* Reposition virtual buffer if at start of strip. */ | ||
168 | if (post->next_row == 0) { | ||
169 | post->buffer = (*cinfo->mem->access_virt_sarray) | ||
170 | ((j_common_ptr) cinfo, post->whole_image, | ||
171 | post->starting_row, post->strip_height, TRUE); | ||
172 | } | ||
173 | |||
174 | /* Upsample some data (up to a strip height's worth). */ | ||
175 | old_next_row = post->next_row; | ||
176 | (*cinfo->upsample->upsample) (cinfo, | ||
177 | input_buf, in_row_group_ctr, in_row_groups_avail, | ||
178 | post->buffer, &post->next_row, post->strip_height); | ||
179 | |||
180 | /* Allow quantizer to scan new data. No data is emitted, */ | ||
181 | /* but we advance out_row_ctr so outer loop can tell when we're done. */ | ||
182 | if (post->next_row > old_next_row) { | ||
183 | num_rows = post->next_row - old_next_row; | ||
184 | (*cinfo->cquantize->color_quantize) (cinfo, post->buffer + old_next_row, | ||
185 | (JSAMPARRAY) NULL, (int) num_rows); | ||
186 | *out_row_ctr += num_rows; | ||
187 | } | ||
188 | |||
189 | /* Advance if we filled the strip. */ | ||
190 | if (post->next_row >= post->strip_height) { | ||
191 | post->starting_row += post->strip_height; | ||
192 | post->next_row = 0; | ||
193 | } | ||
194 | } | ||
195 | |||
196 | |||
197 | /* | ||
198 | * Process some data in the second pass of 2-pass quantization. | ||
199 | */ | ||
200 | |||
201 | METHODDEF(void) | ||
202 | post_process_2pass (j_decompress_ptr cinfo, | ||
203 | JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | ||
204 | JDIMENSION in_row_groups_avail, | ||
205 | JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | ||
206 | JDIMENSION out_rows_avail) | ||
207 | { | ||
208 | my_post_ptr post = (my_post_ptr) cinfo->post; | ||
209 | JDIMENSION num_rows, max_rows; | ||
210 | |||
211 | /* Reposition virtual buffer if at start of strip. */ | ||
212 | if (post->next_row == 0) { | ||
213 | post->buffer = (*cinfo->mem->access_virt_sarray) | ||
214 | ((j_common_ptr) cinfo, post->whole_image, | ||
215 | post->starting_row, post->strip_height, FALSE); | ||
216 | } | ||
217 | |||
218 | /* Determine number of rows to emit. */ | ||
219 | num_rows = post->strip_height - post->next_row; /* available in strip */ | ||
220 | max_rows = out_rows_avail - *out_row_ctr; /* available in output area */ | ||
221 | if (num_rows > max_rows) | ||
222 | num_rows = max_rows; | ||
223 | /* We have to check bottom of image here, can't depend on upsampler. */ | ||
224 | max_rows = cinfo->output_height - post->starting_row; | ||
225 | if (num_rows > max_rows) | ||
226 | num_rows = max_rows; | ||
227 | |||
228 | /* Quantize and emit data. */ | ||
229 | (*cinfo->cquantize->color_quantize) (cinfo, | ||
230 | post->buffer + post->next_row, output_buf + *out_row_ctr, | ||
231 | (int) num_rows); | ||
232 | *out_row_ctr += num_rows; | ||
233 | |||
234 | /* Advance if we filled the strip. */ | ||
235 | post->next_row += num_rows; | ||
236 | if (post->next_row >= post->strip_height) { | ||
237 | post->starting_row += post->strip_height; | ||
238 | post->next_row = 0; | ||
239 | } | ||
240 | } | ||
241 | |||
242 | #endif /* QUANT_2PASS_SUPPORTED */ | ||
243 | |||
244 | |||
245 | /* | ||
246 | * Initialize postprocessing controller. | ||
247 | */ | ||
248 | |||
249 | GLOBAL(void) | ||
250 | jinit_d_post_controller (j_decompress_ptr cinfo, boolean need_full_buffer) | ||
251 | { | ||
252 | my_post_ptr post; | ||
253 | |||
254 | post = (my_post_ptr) | ||
255 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | ||
256 | SIZEOF(my_post_controller)); | ||
257 | cinfo->post = (struct jpeg_d_post_controller *) post; | ||
258 | post->pub.start_pass = start_pass_dpost; | ||
259 | post->whole_image = NULL; /* flag for no virtual arrays */ | ||
260 | post->buffer = NULL; /* flag for no strip buffer */ | ||
261 | |||
262 | /* Create the quantization buffer, if needed */ | ||
263 | if (cinfo->quantize_colors) { | ||
264 | /* The buffer strip height is max_v_samp_factor, which is typically | ||
265 | * an efficient number of rows for upsampling to return. | ||
266 | * (In the presence of output rescaling, we might want to be smarter?) | ||
267 | */ | ||
268 | post->strip_height = (JDIMENSION) cinfo->max_v_samp_factor; | ||
269 | if (need_full_buffer) { | ||
270 | /* Two-pass color quantization: need full-image storage. */ | ||
271 | /* We round up the number of rows to a multiple of the strip height. */ | ||
272 | #ifdef QUANT_2PASS_SUPPORTED | ||
273 | post->whole_image = (*cinfo->mem->request_virt_sarray) | ||
274 | ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE, | ||
275 | cinfo->output_width * cinfo->out_color_components, | ||
276 | (JDIMENSION) jround_up((long) cinfo->output_height, | ||
277 | (long) post->strip_height), | ||
278 | post->strip_height); | ||
279 | #else | ||
280 | ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); | ||
281 | #endif /* QUANT_2PASS_SUPPORTED */ | ||
282 | } else { | ||
283 | /* One-pass color quantization: just make a strip buffer. */ | ||
284 | post->buffer = (*cinfo->mem->alloc_sarray) | ||
285 | ((j_common_ptr) cinfo, JPOOL_IMAGE, | ||
286 | cinfo->output_width * cinfo->out_color_components, | ||
287 | post->strip_height); | ||
288 | } | ||
289 | } | ||
290 | } | ||