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wrrle.c
Go to the documentation of this file.00001
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00019 #include "cdjpeg.h"
00020
00021 #ifdef RLE_SUPPORTED
00022
00023
00024
00025 #include <rle.h>
00026
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00030
00031
00032 #if BITS_IN_JSAMPLE != 8
00033 Sorry, this code only copes with 8-bit JSAMPLEs.
00034 #endif
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00050 #define CMAPBITS 8
00051 #define CMAPLENGTH (1<<(CMAPBITS))
00052
00053 typedef struct {
00054 struct djpeg_dest_struct pub;
00055
00056 jvirt_sarray_ptr image;
00057 rle_map *colormap;
00058 rle_pixel **rle_row;
00059
00060 } rle_dest_struct;
00061
00062 typedef rle_dest_struct * rle_dest_ptr;
00063
00064
00065 METHODDEF(void) rle_put_pixel_rows
00066 JPP((j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
00067 JDIMENSION rows_supplied));
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00076 METHODDEF(void)
00077 start_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
00078 {
00079 rle_dest_ptr dest = (rle_dest_ptr) dinfo;
00080 size_t cmapsize;
00081 int i, ci;
00082 #ifdef PROGRESS_REPORT
00083 cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
00084 #endif
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00099 if (cinfo->output_width > 32767 || cinfo->output_height > 32767)
00100 ERREXIT2(cinfo, JERR_RLE_DIMENSIONS, cinfo->output_width,
00101 cinfo->output_height);
00102
00103 if (cinfo->out_color_space != JCS_GRAYSCALE &&
00104 cinfo->out_color_space != JCS_RGB)
00105 ERREXIT(cinfo, JERR_RLE_COLORSPACE);
00106
00107 if (cinfo->output_components != 1 && cinfo->output_components != 3)
00108 ERREXIT1(cinfo, JERR_RLE_TOOMANYCHANNELS, cinfo->num_components);
00109
00110
00111
00112 dest->colormap = NULL;
00113
00114 if (cinfo->quantize_colors) {
00115
00116 cmapsize = cinfo->out_color_components * CMAPLENGTH * SIZEOF(rle_map);
00117 dest->colormap = (rle_map *) (*cinfo->mem->alloc_small)
00118 ((j_common_ptr) cinfo, JPOOL_IMAGE, cmapsize);
00119 MEMZERO(dest->colormap, cmapsize);
00120
00121
00122
00123 for (ci = 0; ci < cinfo->out_color_components; ci++) {
00124 for (i = 0; i < cinfo->actual_number_of_colors; i++) {
00125 dest->colormap[ci * CMAPLENGTH + i] =
00126 GETJSAMPLE(cinfo->colormap[ci][i]) << 8;
00127 }
00128 }
00129 }
00130
00131
00132 dest->pub.buffer = (*cinfo->mem->access_virt_sarray)
00133 ((j_common_ptr) cinfo, dest->image, (JDIMENSION) 0, (JDIMENSION) 1, TRUE);
00134 dest->pub.buffer_height = 1;
00135
00136 dest->pub.put_pixel_rows = rle_put_pixel_rows;
00137
00138 #ifdef PROGRESS_REPORT
00139 if (progress != NULL) {
00140 progress->total_extra_passes++;
00141 }
00142 #endif
00143 }
00144
00145
00146
00147
00148
00149
00150
00151
00152 METHODDEF(void)
00153 rle_put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
00154 JDIMENSION rows_supplied)
00155 {
00156 rle_dest_ptr dest = (rle_dest_ptr) dinfo;
00157
00158 if (cinfo->output_scanline < cinfo->output_height) {
00159 dest->pub.buffer = (*cinfo->mem->access_virt_sarray)
00160 ((j_common_ptr) cinfo, dest->image,
00161 cinfo->output_scanline, (JDIMENSION) 1, TRUE);
00162 }
00163 }
00164
00165
00166
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00169
00170
00171 METHODDEF(void)
00172 finish_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
00173 {
00174 rle_dest_ptr dest = (rle_dest_ptr) dinfo;
00175 rle_hdr header;
00176 rle_pixel **rle_row, *red, *green, *blue;
00177 JSAMPROW output_row;
00178 char cmapcomment[80];
00179 int row, col;
00180 int ci;
00181 #ifdef PROGRESS_REPORT
00182 cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
00183 #endif
00184
00185
00186 header = *rle_hdr_init(NULL);
00187 header.rle_file = dest->pub.output_file;
00188 header.xmin = 0;
00189 header.xmax = cinfo->output_width - 1;
00190 header.ymin = 0;
00191 header.ymax = cinfo->output_height - 1;
00192 header.alpha = 0;
00193 header.ncolors = cinfo->output_components;
00194 for (ci = 0; ci < cinfo->output_components; ci++) {
00195 RLE_SET_BIT(header, ci);
00196 }
00197 if (cinfo->quantize_colors) {
00198 header.ncmap = cinfo->out_color_components;
00199 header.cmaplen = CMAPBITS;
00200 header.cmap = dest->colormap;
00201
00202 sprintf(cmapcomment, "color_map_length=%d", cinfo->actual_number_of_colors);
00203 rle_putcom(cmapcomment, &header);
00204 }
00205
00206
00207 rle_put_setup(&header);
00208
00209
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00213
00214 #ifdef PROGRESS_REPORT
00215 if (progress != NULL) {
00216 progress->pub.pass_limit = cinfo->output_height;
00217 progress->pub.pass_counter = 0;
00218 (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
00219 }
00220 #endif
00221
00222 if (cinfo->output_components == 1) {
00223 for (row = cinfo->output_height-1; row >= 0; row--) {
00224 rle_row = (rle_pixel **) (*cinfo->mem->access_virt_sarray)
00225 ((j_common_ptr) cinfo, dest->image,
00226 (JDIMENSION) row, (JDIMENSION) 1, FALSE);
00227 rle_putrow(rle_row, (int) cinfo->output_width, &header);
00228 #ifdef PROGRESS_REPORT
00229 if (progress != NULL) {
00230 progress->pub.pass_counter++;
00231 (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
00232 }
00233 #endif
00234 }
00235 } else {
00236 for (row = cinfo->output_height-1; row >= 0; row--) {
00237 rle_row = (rle_pixel **) dest->rle_row;
00238 output_row = * (*cinfo->mem->access_virt_sarray)
00239 ((j_common_ptr) cinfo, dest->image,
00240 (JDIMENSION) row, (JDIMENSION) 1, FALSE);
00241 red = rle_row[0];
00242 green = rle_row[1];
00243 blue = rle_row[2];
00244 for (col = cinfo->output_width; col > 0; col--) {
00245 *red++ = GETJSAMPLE(*output_row++);
00246 *green++ = GETJSAMPLE(*output_row++);
00247 *blue++ = GETJSAMPLE(*output_row++);
00248 }
00249 rle_putrow(rle_row, (int) cinfo->output_width, &header);
00250 #ifdef PROGRESS_REPORT
00251 if (progress != NULL) {
00252 progress->pub.pass_counter++;
00253 (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
00254 }
00255 #endif
00256 }
00257 }
00258
00259 #ifdef PROGRESS_REPORT
00260 if (progress != NULL)
00261 progress->completed_extra_passes++;
00262 #endif
00263
00264
00265 rle_puteof(&header);
00266 fflush(dest->pub.output_file);
00267 if (ferror(dest->pub.output_file))
00268 ERREXIT(cinfo, JERR_FILE_WRITE);
00269 }
00270
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00275
00276 GLOBAL(djpeg_dest_ptr)
00277 jinit_write_rle (j_decompress_ptr cinfo)
00278 {
00279 rle_dest_ptr dest;
00280
00281
00282 dest = (rle_dest_ptr)
00283 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
00284 SIZEOF(rle_dest_struct));
00285 dest->pub.start_output = start_output_rle;
00286 dest->pub.finish_output = finish_output_rle;
00287
00288
00289 jpeg_calc_output_dimensions(cinfo);
00290
00291
00292 dest->rle_row = (*cinfo->mem->alloc_sarray)
00293 ((j_common_ptr) cinfo, JPOOL_IMAGE,
00294 cinfo->output_width, (JDIMENSION) cinfo->output_components);
00295
00296
00297 dest->image = (*cinfo->mem->request_virt_sarray)
00298 ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
00299 (JDIMENSION) (cinfo->output_width * cinfo->output_components),
00300 cinfo->output_height, (JDIMENSION) 1);
00301
00302 return (djpeg_dest_ptr) dest;
00303 }
00304
00305 #endif