Lines Matching defs:png_ptr
64 png_write_chunk(png_structp png_ptr, png_bytep chunk_name,
67 png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
68 png_write_chunk_data(png_ptr, data, length);
69 png_write_chunk_end(png_ptr);
77 png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
85 png_write_data(png_ptr, buf, (png_size_t)4);
88 png_write_data(png_ptr, chunk_name, (png_size_t)4);
90 png_reset_crc(png_ptr);
91 png_calculate_crc(png_ptr, chunk_name, (png_size_t)4);
100 png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length)
105 png_calculate_crc(png_ptr, data, length);
106 png_write_data(png_ptr, data, length);
112 png_write_chunk_end(png_structp png_ptr)
117 png_save_uint_32(buf, png_ptr->crc);
119 png_write_data(png_ptr, buf, (png_size_t)4);
129 png_write_sig(png_structp png_ptr)
133 png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
134 (png_size_t)8 - png_ptr->sig_bytes);
135 if(png_ptr->sig_bytes < 3)
136 png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
156 /* compress given text into storage in the png_ptr structure */
158 png_text_compress(png_structp png_ptr,
181 png_warning(png_ptr, msg);
183 png_warning(png_ptr, "Unknown compression type");
203 png_ptr->zstream.avail_in = (uInt)text_len;
204 png_ptr->zstream.next_in = (Bytef *)text;
205 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
206 png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
212 ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
216 if (png_ptr->zstream.msg != NULL)
217 png_error(png_ptr, png_ptr->zstream.msg);
219 png_error(png_ptr, "zlib error");
222 if (!(png_ptr->zstream.avail_out))
236 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
241 png_free(png_ptr, old_ptr);
244 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
250 comp->output_ptr[comp->num_output_ptr] = (png_charp)png_malloc(png_ptr,
251 (png_uint_32)png_ptr->zbuf_size);
252 png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
253 png_ptr->zbuf_size);
257 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
258 png_ptr->zstream.next_out = png_ptr->zbuf;
261 } while (png_ptr->zstream.avail_in);
267 ret = deflate(&png_ptr->zstream, Z_FINISH);
272 if (!(png_ptr->zstream.avail_out))
287 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
292 png_free(png_ptr, old_ptr);
295 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
302 (png_charp)png_malloc(png_ptr, (png_uint_32)png_ptr->zbuf_size);
303 png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
304 png_ptr->zbuf_size);
308 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
309 png_ptr->zstream.next_out = png_ptr->zbuf;
315 if (png_ptr->zstream.msg != NULL)
316 png_error(png_ptr, png_ptr->zstream.msg);
318 png_error(png_ptr, "zlib error");
323 text_len = png_ptr->zbuf_size * comp->num_output_ptr;
324 if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
325 text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
332 png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
339 png_write_chunk_data(png_ptr, (png_bytep)comp->input,
347 png_write_chunk_data(png_ptr,(png_bytep)comp->output_ptr[i],
348 png_ptr->zbuf_size);
349 png_free(png_ptr, comp->output_ptr[i]);
353 png_free(png_ptr, comp->output_ptr);
356 if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
357 png_write_chunk_data(png_ptr, png_ptr->zbuf,
358 png_ptr->zbuf_size - png_ptr->zstream.avail_out);
361 deflateReset(&png_ptr->zstream);
362 png_ptr->zstream.data_type = Z_BINARY;
371 png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
391 case 16: png_ptr->channels = 1; break;
392 default: png_error(png_ptr,"Invalid bit depth for grayscale image");
397 png_error(png_ptr, "Invalid bit depth for RGB image");
398 png_ptr->channels = 3;
406 case 8: png_ptr->channels = 1; break;
407 default: png_error(png_ptr, "Invalid bit depth for paletted image");
412 png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
413 png_ptr->channels = 2;
417 png_error(png_ptr, "Invalid bit depth for RGBA image");
418 png_ptr->channels = 4;
421 png_error(png_ptr, "Invalid image color type specified");
426 png_warning(png_ptr, "Invalid compression type specified");
441 !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
442 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
449 png_warning(png_ptr, "Invalid filter type specified");
457 png_warning(png_ptr, "Invalid interlace type specified");
465 png_ptr->bit_depth = (png_byte)bit_depth;
466 png_ptr->color_type = (png_byte)color_type;
467 png_ptr->interlaced = (png_byte)interlace_type;
469 png_ptr->filter_type = (png_byte)filter_type;
471 png_ptr->compression_type = (png_byte)compression_type;
472 png_ptr->width = width;
473 png_ptr->height = height;
475 png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
476 png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
478 png_ptr->usr_width = png_ptr->width;
479 png_ptr->usr_bit_depth = png_ptr->bit_depth;
480 png_ptr->usr_channels = png_ptr->channels;
492 png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
495 png_ptr->zstream.zalloc = png_zalloc;
496 png_ptr->zstream.zfree = png_zfree;
497 png_ptr->zstream.opaque = (voidpf)png_ptr;
498 if (!(png_ptr->do_filter))
500 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
501 png_ptr->bit_depth < 8)
502 png_ptr->do_filter = PNG_FILTER_NONE;
504 png_ptr->do_filter = PNG_ALL_FILTERS;
506 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY))
508 if (png_ptr->do_filter != PNG_FILTER_NONE)
509 png_ptr->zlib_strategy = Z_FILTERED;
511 png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY;
513 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL))
514 png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
515 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL))
516 png_ptr->zlib_mem_level = 8;
517 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS))
518 png_ptr->zlib_window_bits = 15;
519 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD))
520 png_ptr->zlib_method = 8;
521 deflateInit2(&png_ptr->zstream, png_ptr->zlib_level,
522 png_ptr->zlib_method, png_ptr->zlib_window_bits,
523 png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
524 png_ptr->zstream.next_out = png_ptr->zbuf;
525 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
528 png_ptr->zstream.data_type = Z_BINARY;
530 png_ptr->mode = PNG_HAVE_IHDR;
538 png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
550 !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
554 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
556 png_error(png_ptr, "Invalid number of colors in palette");
560 png_warning(png_ptr, "Invalid number of colors in palette");
565 if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
567 png_warning(png_ptr,
572 png_ptr->num_palette = (png_uint_16)num_pal;
573 png_debug1(3, "num_palette = %d\n", png_ptr->num_palette);
575 png_write_chunk_start(png_ptr, (png_bytep)png_PLTE, num_pal * 3);
582 png_write_chunk_data(png_ptr, buf, (png_size_t)3);
592 png_write_chunk_data(png_ptr, buf, (png_size_t)3);
595 png_write_chunk_end(png_ptr);
596 png_ptr->mode |= PNG_HAVE_PLTE;
601 png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
610 if (!(png_ptr->mode & PNG_HAVE_IDAT) &&
611 png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
620 png_ptr->height < 16384 && png_ptr->width < 16384)
622 png_uint_32 uncompressed_idat_size = png_ptr->height *
623 ((png_ptr->width *
624 png_ptr->channels * png_ptr->bit_depth + 15) >> 3);
643 png_error(png_ptr,
647 png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
648 png_ptr->mode |= PNG_HAVE_IDAT;
653 png_write_IEND(png_structp png_ptr)
659 png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
661 png_ptr->mode |= PNG_HAVE_IEND;
668 png_write_gAMA(png_structp png_ptr, double file_gamma)
680 png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
685 png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
695 png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
703 png_write_sRGB(png_structp png_ptr, int srgb_intent)
712 png_warning(png_ptr,
715 png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1);
722 png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
733 if (name == NULL || (name_len = png_check_keyword(png_ptr, name,
736 png_warning(png_ptr, "Empty keyword in iCCP chunk");
741 png_warning(png_ptr, "Unknown compression type in iCCP chunk");
747 profile_len = png_text_compress(png_ptr, profile, (png_size_t)profile_len,
751 png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
754 png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 2);
757 png_write_compressed_data_out(png_ptr, &comp);
759 png_write_chunk_end(png_ptr);
760 png_free(png_ptr, new_name);
767 png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
783 if (spalette->name == NULL || (name_len = png_check_keyword(png_ptr,
786 png_warning(png_ptr, "Empty keyword in sPLT chunk");
791 png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
793 png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 1);
794 png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, 1);
816 png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
838 png_write_chunk_data(png_ptr, entrybuf, entry_size);
842 png_write_chunk_end(png_ptr);
843 png_free(png_ptr, new_name);
850 png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
865 png_ptr->usr_bit_depth);
870 png_warning(png_ptr, "Invalid sBIT depth specified");
880 if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
882 png_warning(png_ptr, "Invalid sBIT depth specified");
891 if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
893 png_warning(png_ptr, "Invalid sBIT depth specified");
899 png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size);
907 png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
922 png_warning(png_ptr, "Invalid cHRM white point specified");
936 png_warning(png_ptr, "Invalid cHRM red point specified");
947 png_warning(png_ptr, "Invalid cHRM green point specified");
958 png_warning(png_ptr, "Invalid cHRM blue point specified");
966 png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
971 png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
985 png_warning(png_ptr, "Invalid fixed cHRM white point specified");
996 png_warning(png_ptr, "Invalid cHRM fixed red point specified");
1004 png_warning(png_ptr, "Invalid fixed cHRM green point specified");
1012 png_warning(png_ptr, "Invalid fixed cHRM blue point specified");
1018 png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
1026 png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
1037 if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
1039 png_warning(png_ptr,"Invalid number of transparent colors specified");
1043 png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans, (png_size_t)num_trans);
1048 if(tran->gray >= (1 << png_ptr->bit_depth))
1050 png_warning(png_ptr,
1055 png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
1063 if(png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
1065 png_warning(png_ptr,
1069 png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
1073 png_warning(png_ptr, "Can't write tRNS with an alpha channel");
1081 png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
1093 (png_ptr->num_palette ||
1094 (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) &&
1096 back->index > png_ptr->num_palette)
1098 png_warning(png_ptr, "Invalid background palette index");
1102 png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1);
1109 if(png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
1111 png_warning(png_ptr,
1115 png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
1119 if(back->gray >= (1 << png_ptr->bit_depth))
1121 png_warning(png_ptr,
1126 png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
1134 png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
1143 if (num_hist > (int)png_ptr->num_palette)
1146 png_ptr->num_palette);
1147 png_warning(png_ptr, "Invalid number of histogram entries specified");
1151 png_write_chunk_start(png_ptr, (png_bytep)png_hIST, (png_uint_32)(num_hist * 2));
1155 png_write_chunk_data(png_ptr, buf, (png_size_t)2);
1157 png_write_chunk_end(png_ptr);
1174 png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
1186 png_warning(png_ptr, "zero length keyword");
1192 *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
1195 png_warning(png_ptr, "Out of memory while procesing keyword");
1208 png_warning(png_ptr, msg);
1210 png_warning(png_ptr, "invalid character in keyword");
1225 png_warning(png_ptr, "trailing spaces removed from keyword");
1238 png_warning(png_ptr, "leading spaces removed from keyword");
1270 png_warning(png_ptr, "extra interior spaces removed from keyword");
1274 png_free(png_ptr, *new_key);
1276 png_warning(png_ptr, "Zero length keyword");
1281 png_warning(png_ptr, "keyword length must be 1 - 79 characters");
1293 png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
1303 if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
1305 png_warning(png_ptr, "Empty keyword in tEXt chunk");
1315 png_write_chunk_start(png_ptr, (png_bytep)png_tEXt, (png_uint_32)key_len+text_len+1);
1322 png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
1324 png_write_chunk_data(png_ptr, (png_bytep)text, text_len);
1326 png_write_chunk_end(png_ptr);
1327 png_free(png_ptr, new_key);
1334 png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
1347 if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
1349 png_warning(png_ptr, "Empty keyword in zTXt chunk");
1355 png_write_tEXt(png_ptr, new_key, text, (png_size_t)0);
1356 png_free(png_ptr, new_key);
1362 png_free(png_ptr, new_key);
1365 text_len = png_text_compress(png_ptr, text, text_len, compression,
1369 png_write_chunk_start(png_ptr, (png_bytep)png_zTXt, (png_uint_32)
1372 png_write_chunk_data(png_ptr, (png_bytep)key, key_len + 1);
1375 png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1);
1377 png_write_compressed_data_out(png_ptr, &comp);
1380 png_write_chunk_end(png_ptr);
1387 png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
1400 if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
1402 png_warning(png_ptr, "Empty keyword in iTXt chunk");
1405 if (lang == NULL || (lang_len = png_check_keyword(png_ptr, lang, &new_lang))==0)
1407 png_warning(png_ptr, "Empty language field in iTXt chunk");
1423 text_len = png_text_compress(png_ptr, text, text_len, compression-2,
1430 png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
1444 png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
1454 png_write_chunk_data(png_ptr, cbuf, 2);
1457 png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf), lang_len + 1);
1458 png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf), lang_key_len + 1);
1459 png_write_compressed_data_out(png_ptr, &comp);
1461 png_write_chunk_end(png_ptr);
1462 png_free(png_ptr, new_key);
1464 png_free(png_ptr, new_lang);
1471 png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
1481 png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
1487 png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9);
1494 png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
1508 png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
1510 purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1;
1516 params_len = (png_uint_32p)png_malloc(png_ptr, (png_uint_32)(nparams
1529 png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len);
1530 png_write_chunk_data(png_ptr, (png_bytep)new_purpose, purpose_len);
1535 png_write_chunk_data(png_ptr, buf, (png_size_t)10);
1536 png_write_chunk_data(png_ptr, (png_bytep)units, (png_size_t)units_len);
1538 png_free(png_ptr, new_purpose);
1542 png_write_chunk_data(png_ptr, (png_bytep)params[i],
1546 png_free(png_ptr, params_len);
1547 png_write_chunk_end(png_ptr);
1555 png_write_sCAL(png_structp png_ptr, int unit, double width,double height)
1582 png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
1583 png_write_chunk_data(png_ptr, (png_bytep)&bunit, 1);
1584 png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
1585 png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
1587 png_write_chunk_end(png_ptr);
1592 png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
1609 png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
1610 png_write_chunk_data(png_ptr, (png_bytep)&bunit, 1);
1611 png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
1612 png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
1614 png_write_chunk_end(png_ptr);
1623 png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
1634 png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
1640 png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9);
1649 png_write_tIME(png_structp png_ptr, png_timep mod_time)
1661 png_warning(png_ptr, "Invalid time specified for tIME chunk");
1672 png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7);
1678 png_write_start_row(png_structp png_ptr)
1700 png_ptr->usr_channels*png_ptr->usr_bit_depth,png_ptr->width)+1);
1703 png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size);
1704 png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
1707 if (png_ptr->do_filter & PNG_FILTER_SUB)
1709 png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
1710 (png_ptr->rowbytes + 1));
1711 png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
1715 if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
1718 png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size);
1719 png_memset(png_ptr->prev_row, 0, buf_size);
1721 if (png_ptr->do_filter & PNG_FILTER_UP)
1723 png_ptr->up_row = (png_bytep )png_malloc(png_ptr,
1724 (png_ptr->rowbytes + 1));
1725 png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
1728 if (png_ptr->do_filter & PNG_FILTER_AVG)
1730 png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
1731 (png_ptr->rowbytes + 1));
1732 png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
1735 if (png_ptr->do_filter & PNG_FILTER_PAETH)
1737 png_ptr->paeth_row = (png_bytep )png_malloc(png_ptr,
1738 (png_ptr->rowbytes + 1));
1739 png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
1745 if (png_ptr->interlaced)
1747 if (!(png_ptr->transformations & PNG_INTERLACE))
1749 png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
1751 png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
1756 png_ptr->num_rows = png_ptr->height;
1757 png_ptr->usr_width = png_ptr->width;
1763 png_ptr->num_rows = png_ptr->height;
1764 png_ptr->usr_width = png_ptr->width;
1766 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1767 png_ptr->zstream.next_out = png_ptr->zbuf;
1772 png_write_finish_row(png_structp png_ptr)
1794 png_ptr->row_number++;
1797 if (png_ptr->row_number < png_ptr->num_rows)
1802 if (png_ptr->interlaced)
1804 png_ptr->row_number = 0;
1805 if (png_ptr->transformations & PNG_INTERLACE)
1807 png_ptr->pass++;
1814 png_ptr->pass++;
1815 if (png_ptr->pass >= 7)
1817 png_ptr->usr_width = (png_ptr->width +
1818 png_pass_inc[png_ptr->pass] - 1 -
1819 png_pass_start[png_ptr->pass]) /
1820 png_pass_inc[png_ptr->pass];
1821 png_ptr->num_rows = (png_ptr->height +
1822 png_pass_yinc[png_ptr->pass] - 1 -
1823 png_pass_ystart[png_ptr->pass]) /
1824 png_pass_yinc[png_ptr->pass];
1825 if (png_ptr->transformations & PNG_INTERLACE)
1827 } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
1832 if (png_ptr->pass < 7)
1834 if (png_ptr->prev_row != NULL)
1835 png_memset(png_ptr->prev_row, 0,
1836 (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
1837 png_ptr->usr_bit_depth,png_ptr->width))+1);
1848 ret = deflate(&png_ptr->zstream, Z_FINISH);
1853 if (!(png_ptr->zstream.avail_out))
1855 png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
1856 png_ptr->zstream.next_out = png_ptr->zbuf;
1857 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1862 if (png_ptr->zstream.msg != NULL)
1863 png_error(png_ptr, png_ptr->zstream.msg);
1865 png_error(png_ptr, "zlib error");
1870 if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
1872 png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size -
1873 png_ptr->zstream.avail_out);
1876 deflateReset(&png_ptr->zstream);
1877 png_ptr->zstream.data_type = Z_BINARY;
2060 png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
2064 png_byte filter_to_do = png_ptr->do_filter;
2067 int num_p_filters = (int)png_ptr->num_prev_filters;
2074 prev_row = png_ptr->prev_row;
2075 best_row = row_buf = png_ptr->row_buf;
2118 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2128 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
2130 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2132 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2141 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
2143 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
2161 for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
2171 best_row = png_ptr->sub_row;
2186 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2195 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
2197 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2199 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2204 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2206 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2216 for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
2235 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2244 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
2246 sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
2248 sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
2253 sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2255 sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2268 best_row = png_ptr->sub_row;
2278 for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
2284 best_row = png_ptr->up_row;
2296 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2305 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
2307 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2309 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2314 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
2316 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
2326 for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
2338 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2347 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
2349 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2351 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2356 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
2358 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
2371 best_row = png_ptr->up_row;
2380 for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
2390 best_row = png_ptr->avg_row;
2401 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2410 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
2412 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2414 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2419 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
2421 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
2431 for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
2450 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2459 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
2461 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2463 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2468 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
2470 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
2483 best_row = png_ptr->avg_row;
2492 for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
2523 best_row = png_ptr->paeth_row;
2534 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2543 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
2545 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2547 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2552 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2554 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2564 for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
2615 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2624 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
2626 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2628 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2633 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2635 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2647 best_row = png_ptr->paeth_row;
2653 png_write_filtered_row(png_ptr, best_row);
2657 if (png_ptr->num_prev_filters > 0)
2662 png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
2664 png_ptr->prev_filters[j] = best_row[0];
2672 png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
2678 png_ptr->zstream.next_in = filtered_row;
2679 png_ptr->zstream.avail_in = (uInt)png_ptr->row_info.rowbytes + 1;
2686 ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
2690 if (png_ptr->zstream.msg != NULL)
2691 png_error(png_ptr, png_ptr->zstream.msg);
2693 png_error(png_ptr, "zlib error");
2697 if (!(png_ptr->zstream.avail_out))
2700 png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
2701 png_ptr->zstream.next_out = png_ptr->zbuf;
2702 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
2705 } while (png_ptr->zstream.avail_in);
2708 if (png_ptr->prev_row != NULL)
2712 tptr = png_ptr->prev_row;
2713 png_ptr->prev_row = png_ptr->row_buf;
2714 png_ptr->row_buf = tptr;
2718 png_write_finish_row(png_ptr);
2721 png_ptr->flush_rows++;
2723 if (png_ptr->flush_dist > 0 &&
2724 png_ptr->flush_rows >= png_ptr->flush_dist)
2726 png_write_flush(png_ptr);