src/main/dither-inks.c

110   stpi_dither_channel_t *dc = &(CHANNEL(d, idx));
114   memset(dc, 0, sizeof(stpi_dither_channel_t));
115   stp_dither_matrix_clone(&(d->dither_matrix), &(dc->dithermat), 0, 0);
175 	  stpi_dither_channel_t *dc = &(CHANNEL(d, i));
176 	  stp_dither_matrix_clone(&(d->dither_matrix), &(dc->dithermat),
178 	  stp_dither_matrix_clone(&(d->dither_matrix), &(dc->pick),
201 stpi_dither_finalize_ranges(stp_vars_t *v, stpi_dither_channel_t *dc)
205   unsigned lbit = dc->bit_max;
206   dc->signif_bits = 0;
209       dc->signif_bits++;
213   for (i = 0; i < dc->nlevels; i++)
215       if (dc->ranges[i].lower->bits == dc->ranges[i].upper->bits)
216 	dc->ranges[i].is_same_ink = 1;
218 	dc->ranges[i].is_same_ink = 0;
219       if (dc->ranges[i].range_span > 0 && dc->ranges[i].value_span > 0)
220 	dc->ranges[i].is_equal = 0;
222 	dc->ranges[i].is_equal = 1;
226 		  i, dc->ranges[i].lower->value, dc->ranges[i].upper->value,
227 		  dc->ranges[i].lower->range, dc->ranges[i].upper->range);
230 		  dc->ranges[i].lower->bits, dc->ranges[i].upper->bits);
233 		  dc->ranges[i].range_span, dc->ranges[i].value_span,
234 		  dc->ranges[i].is_same_ink, dc->ranges[i].is_equal);
235       if (i > 0 && dc->ranges[i].lower->range >= d->adaptive_limit)
237 	  d->adaptive_limit = dc->ranges[i].lower->range + 1;
244   for (i = 0; i <= dc->nlevels; i++)
247 		i, dc->ink_list[i].range,
248 		dc->ink_list[i].value, dc->ink_list[i].bits);
249   if (dc->nlevels == 1 && dc->ranges[0].upper->bits == 1)
250     dc->very_fast = 1;
252     dc->very_fast = 0;
255 	      "  bit_max %d signif_bits %d\n", dc->bit_max, dc->signif_bits);
263   stpi_dither_channel_t *dc = &(CHANNEL(d, color));
268   STP_SAFE_FREE(dc->ranges);
269   STP_SAFE_FREE(dc->ink_list);
271   dc->nlevels = nlevels > 1 ? nlevels + 1 : nlevels;
272   dc->ranges = (stpi_dither_segment_t *)
273     stp_zalloc(dc->nlevels * sizeof(stpi_dither_segment_t));
274   dc->ink_list = (stpi_ink_defn_t *)
275     stp_zalloc((dc->nlevels + 1) * sizeof(stpi_ink_defn_t));
276   dc->bit_max = 0;
277   dc->density = density * 65535;
278   dc->darkness = darkness;
287   dc->ranges[0].lower = &dc->ink_list[0];
288   dc->ranges[0].upper = &dc->ink_list[1];
289   dc->ink_list[0].range = 0;
290   dc->ink_list[0].value = 0;
291   dc->ink_list[0].bits = 0;
293     dc->ink_list[1].range = 65535;
295     dc->ink_list[1].range = ranges[0].value * 65535.0 * density;
296   if (dc->ink_list[1].range > 65535)
297     dc->ink_list[1].range = 65535;
298   dc->ink_list[1].value = ranges[0].value * 65535.0;
299   if (dc->ink_list[1].value > 65535)
300     dc->ink_list[1].value = 65535;
301   dc->ink_list[1].bits = ranges[0].bit_pattern;
302   if (ranges[0].bit_pattern > dc->bit_max)
303     dc->bit_max = ranges[0].bit_pattern;
304   dc->ranges[0].range_span = dc->ranges[0].upper->range;
305   dc->ranges[0].value_span = dc->ranges[0].upper->value;
306   if (dc->nlevels > 1)
311 	  dc->ranges[i].lower = &dc->ink_list[i];
312 	  dc->ranges[i].upper = &dc->ink_list[l];
314 	  dc->ink_list[l].range =
316 	  if (dc->ink_list[l].range > 65535)
317 	    dc->ink_list[l].range = 65535;
318 	  dc->ink_list[l].value = ranges[i].value * 65535.0;
319 	  if (dc->ink_list[l].value > 65535)
320 	    dc->ink_list[l].value = 65535;
321 	  dc->ink_list[l].bits = ranges[i].bit_pattern;
322 	  if (ranges[i].bit_pattern > dc->bit_max)
323 	    dc->bit_max = ranges[i].bit_pattern;
324 	  dc->ranges[i].range_span =
325 	    dc->ink_list[l].range - dc->ink_list[i].range;
326 	  dc->ranges[i].value_span =
327 	    dc->ink_list[l].value - dc->ink_list[i].value;
329       dc->ranges[i].lower = &dc->ink_list[i];
330       dc->ranges[i].upper = &dc->ink_list[i+1];
331       dc->ink_list[i+1] = dc->ink_list[i];
332       dc->ink_list[i+1].range = 65535;
333       dc->ranges[i].range_span =
334 	dc->ink_list[i+1].range - dc->ink_list[i].range;
335       dc->ranges[i].value_span =
336 	dc->ink_list[i+1].value - dc->ink_list[i].value;
338   stpi_dither_finalize_ranges(v, dc);
370   stpi_dither_channel_t *dc;
381       dc = &(CHANNEL(d, idx));