11 #define OUTBUFFER_SIZE 0x8000
14 static JOCTET * buffer;
15 static unsigned char*dest;
18 static unsigned char*data;
22 static void file_init_destination(j_compress_ptr cinfo)
24 struct jpeg_destination_mgr*dmgr =
25 (struct jpeg_destination_mgr*)(cinfo->dest);
26 buffer = (JOCTET*)malloc(OUTBUFFER_SIZE);
29 printf("Out of memory!\n");
32 dmgr->next_output_byte = buffer;
33 dmgr->free_in_buffer = OUTBUFFER_SIZE;
36 static boolean file_empty_output_buffer(j_compress_ptr cinfo)
38 struct jpeg_destination_mgr*dmgr =
39 (struct jpeg_destination_mgr*)(cinfo->dest);
41 fwrite(buffer, OUTBUFFER_SIZE, 1, fi);
42 dmgr->next_output_byte = buffer;
43 dmgr->free_in_buffer = OUTBUFFER_SIZE;
47 static void file_term_destination(j_compress_ptr cinfo)
48 { struct jpeg_destination_mgr*dmgr =
49 (struct jpeg_destination_mgr*)(cinfo->dest);
51 fwrite(buffer, OUTBUFFER_SIZE-dmgr->free_in_buffer, 1, fi);
54 dmgr->free_in_buffer = 0;
57 static void mem_init_destination(j_compress_ptr cinfo)
59 struct jpeg_destination_mgr*dmgr =
60 (struct jpeg_destination_mgr*)(cinfo->dest);
61 dmgr->next_output_byte = dest;
62 dmgr->free_in_buffer = destlen;
65 static boolean mem_empty_output_buffer(j_compress_ptr cinfo)
67 printf("jpeg mem overflow!\n");
71 static void mem_term_destination(j_compress_ptr cinfo)
73 struct jpeg_destination_mgr*dmgr =
74 (struct jpeg_destination_mgr*)(cinfo->dest);
75 len = destlen - dmgr->free_in_buffer;
76 dmgr->free_in_buffer = 0;
79 int jpeg_save(unsigned char*data, int width, int height, int quality, const char*filename)
81 struct jpeg_destination_mgr mgr;
82 struct jpeg_compress_struct cinfo;
83 struct jpeg_error_mgr jerr;
87 fi = fopen(filename, "wb");
91 memset(&cinfo, 0, sizeof(cinfo));
92 memset(&jerr, 0, sizeof(jerr));
93 memset(&mgr, 0, sizeof(mgr));
94 cinfo.err = jpeg_std_error(&jerr);
95 jpeg_create_compress(&cinfo);
97 mgr.init_destination = file_init_destination;
98 mgr.empty_output_buffer = file_empty_output_buffer;
99 mgr.term_destination = file_term_destination;
104 cinfo.image_width = width;
105 cinfo.image_height = height;
106 cinfo.input_components = 3;
107 cinfo.in_color_space = JCS_RGB;
108 jpeg_set_defaults(&cinfo);
109 jpeg_set_quality(&cinfo,quality,TRUE);
111 //jpeg_write_tables(&cinfo);
112 //jpeg_suppress_tables(&cinfo, TRUE);
113 jpeg_start_compress(&cinfo, FALSE);
115 for(t=0;t<height;t++) {
116 unsigned char*data2 = &data[width*3*t];
117 jpeg_write_scanlines(&cinfo, &data2, 1);
119 jpeg_finish_compress(&cinfo);
123 jpeg_destroy_compress(&cinfo);
127 int jpeg_save_to_file(unsigned char*data, int width, int height, int quality, FILE*_fi)
129 struct jpeg_destination_mgr mgr;
130 struct jpeg_compress_struct cinfo;
131 struct jpeg_error_mgr jerr;
136 memset(&cinfo, 0, sizeof(cinfo));
137 memset(&jerr, 0, sizeof(jerr));
138 memset(&mgr, 0, sizeof(mgr));
139 cinfo.err = jpeg_std_error(&jerr);
140 jpeg_create_compress(&cinfo);
142 mgr.init_destination = file_init_destination;
143 mgr.empty_output_buffer = file_empty_output_buffer;
144 mgr.term_destination = file_term_destination;
149 cinfo.image_width = width;
150 cinfo.image_height = height;
151 cinfo.input_components = 3;
152 cinfo.in_color_space = JCS_RGB;
153 jpeg_set_defaults(&cinfo);
154 cinfo.dct_method = JDCT_IFAST;
155 jpeg_set_quality(&cinfo,quality,TRUE);
157 //jpeg_write_tables(&cinfo);
158 //jpeg_suppress_tables(&cinfo, TRUE);
159 jpeg_start_compress(&cinfo, FALSE);
161 for(t=0;t<height;t++) {
162 unsigned char*data2 = &data[width*3*t];
163 jpeg_write_scanlines(&cinfo, &data2, 1);
165 jpeg_finish_compress(&cinfo);
166 jpeg_destroy_compress(&cinfo);
170 int jpeg_save_to_mem(unsigned char*data, int width, int height, int quality, unsigned char*_dest, int _destlen)
172 struct jpeg_destination_mgr mgr;
173 struct jpeg_compress_struct cinfo;
174 struct jpeg_error_mgr jerr;
177 memset(&cinfo, 0, sizeof(cinfo));
178 memset(&jerr, 0, sizeof(jerr));
179 memset(&mgr, 0, sizeof(mgr));
180 cinfo.err = jpeg_std_error(&jerr);
181 jpeg_create_compress(&cinfo);
187 mgr.init_destination = mem_init_destination;
188 mgr.empty_output_buffer = mem_empty_output_buffer;
189 mgr.term_destination = mem_term_destination;
194 cinfo.image_width = width;
195 cinfo.image_height = height;
196 cinfo.input_components = 3;
197 cinfo.in_color_space = JCS_RGB;
198 jpeg_set_defaults(&cinfo);
199 cinfo.dct_method = JDCT_IFAST;
200 jpeg_set_quality(&cinfo,quality,TRUE);
202 jpeg_start_compress(&cinfo, FALSE);
203 for(t=0;t<height;t++) {
204 unsigned char*data2 = &data[width*3*t];
205 jpeg_write_scanlines(&cinfo, &data2, 1);
207 jpeg_finish_compress(&cinfo);
208 jpeg_destroy_compress(&cinfo);
212 void mem_init_source (j_decompress_ptr cinfo)
214 struct jpeg_source_mgr* mgr = cinfo->src;
215 mgr->next_input_byte = data;
216 mgr->bytes_in_buffer = size;
217 //printf("init %d\n", size - mgr->bytes_in_buffer);
220 boolean mem_fill_input_buffer (j_decompress_ptr cinfo)
222 struct jpeg_source_mgr* mgr = cinfo->src;
223 printf("fill %d\n", size - mgr->bytes_in_buffer);
227 void mem_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
229 struct jpeg_source_mgr* mgr = cinfo->src;
230 printf("skip %d +%d\n", size - mgr->bytes_in_buffer, num_bytes);
233 mgr->next_input_byte += num_bytes;
234 mgr->bytes_in_buffer -= num_bytes;
237 boolean mem_resync_to_restart (j_decompress_ptr cinfo, int desired)
239 struct jpeg_source_mgr* mgr = cinfo->src;
240 printf("resync %d\n", size - mgr->bytes_in_buffer);
241 mgr->next_input_byte = data;
242 mgr->bytes_in_buffer = size;
246 void mem_term_source (j_decompress_ptr cinfo)
248 struct jpeg_source_mgr* mgr = cinfo->src;
249 //printf("term %d\n", size - mgr->bytes_in_buffer);
252 int jpeg_load_from_mem(unsigned char*_data, int _size, unsigned char*dest, int width, int height)
254 struct jpeg_decompress_struct cinfo;
255 struct jpeg_error_mgr jerr;
256 struct jpeg_source_mgr mgr;
262 jpeg_create_decompress(&cinfo);
264 mgr.next_input_byte = data;
265 mgr.bytes_in_buffer = size;
266 mgr.init_source =mem_init_source ;
267 mgr.fill_input_buffer =mem_fill_input_buffer ;
268 mgr.skip_input_data =mem_skip_input_data ;
269 mgr.resync_to_restart =mem_resync_to_restart ;
270 mgr.term_source =mem_term_source ;
272 cinfo.err = jpeg_std_error(&jerr);
275 jpeg_read_header(&cinfo, TRUE);
276 jpeg_start_decompress(&cinfo);
278 for(y=0;y<height;y++) {
279 unsigned char*j = &dest[width*y*3];
280 jpeg_read_scanlines(&cinfo,&j,1);
283 jpeg_finish_decompress(&cinfo);
284 jpeg_destroy_decompress(&cinfo);
288 typedef struct _RGBA {
289 unsigned char a,r,g,b;
292 typedef unsigned char U8;
294 int jpeg_load(const char*filename, unsigned char**dest, int*_width, int*_height)
296 struct jpeg_decompress_struct cinfo;
297 struct jpeg_error_mgr jerr;
298 struct jpeg_source_mgr mgr;
300 FILE*fi = fopen(filename, "rb");
303 fseek(fi, SEEK_END, 0);
304 long filesize = ftell(fi);
305 fseek(fi, SEEK_SET, 0);
308 cinfo.err = jpeg_std_error(&jerr);
309 jpeg_create_decompress(&cinfo);
310 jpeg_stdio_src(&cinfo, fi);
311 jpeg_read_header(&cinfo, TRUE);
312 jpeg_start_decompress(&cinfo);
314 U8*scanline = (U8 *)malloc(4 * cinfo.output_width);
316 int width = *_width = cinfo.output_width;
317 int height = *_height = cinfo.output_height;
318 *dest = malloc(width*height*4);
321 for (y=0;y<height;y++) {
324 RGBA*line = (RGBA*)&(*dest)[y*width];
326 jpeg_read_scanlines(&cinfo, &js, 1);
327 if (cinfo.out_color_space == JCS_GRAYSCALE) {
328 for (x = 0; x < width; x++) {
330 line[x].r = line[x].g = line[x].b = js[x];
332 } else if (cinfo.out_color_space == JCS_RGB) {
333 for (x = width - 1; x >= 0; x--) {
335 line[x].r = js[x*3+0];
336 line[x].g = js[x*3+1];
337 line[x].b = js[x*3+2];
339 } else if (cinfo.out_color_space == JCS_YCCK) {
340 fprintf(stderr, "Error: Can't convert YCCK to RGB.\n");
342 } else if (cinfo.out_color_space == JCS_YCbCr) {
343 for (x = 0; x < width; x++) {
344 int y = js[x * 3 + 0];
345 int u = js[x * 3 + 1];
346 int v = js[x * 3 + 1];
348 line[x].r = y + ((360 * (v - 128)) >> 8);
349 line[x].g = y - ((88 * (u - 128) + 183 * (v - 128)) >> 8);
350 line[x].b = y + ((455 * (u - 128)) >> 8);
352 } else if (cinfo.out_color_space == JCS_CMYK) {
353 for (x = 0; x < width; x++) {
354 int white = 255 - js[x * 4 + 3];
356 line[x].r = white - ((js[x * 4] * white) >> 8);
357 line[x].g = white - ((js[x * 4 + 1] * white) >> 8);
358 line[x].b = white - ((js[x * 4 + 2] * white) >> 8);
365 jpeg_finish_decompress(&cinfo);
366 jpeg_destroy_decompress(&cinfo);
372 int jpeg_save(unsigned char*data, int width, int height, int quality, const char*filename)
374 fprintf(stderr, "jpeg_save: No JPEG support compiled in\n");
377 int jpeg_save_to_file(unsigned char*data, int width, int height, int quality, FILE*fi)
379 fprintf(stderr, "jpeg_save_to_file: No JPEG support compiled in\n");
382 int jpeg_save_to_mem(unsigned char*data, int width, int height, int quality, unsigned char*dest, int destsize)
384 fprintf(stderr, "jpeg_save_tomem: No JPEG support compiled in\n");
387 int jpeg_load_from_mem(unsigned char*_data, int size, unsigned char*dest, int width, int height)
389 fprintf(stderr, "jpeg_load_from_mem: No JPEG support compiled in\n");
392 int jpeg_load(const char*filename, unsigned char**dest, int*_width, int*_height)
394 fprintf(stderr, "jpeg_load: No JPEG support compiled in\n");