Lines Matching refs:png_ptr
63 png_write_sig(png_structp png_ptr)
68 png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
69 (png_size_t)(8 - png_ptr->sig_bytes));
70 if (png_ptr->sig_bytes < 3)
71 png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
84 png_write_chunk(png_structp png_ptr, png_bytep chunk_name,
87 if (png_ptr == NULL)
89 png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
90 png_write_chunk_data(png_ptr, data, (png_size_t)length);
91 png_write_chunk_end(png_ptr);
99 png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
107 if (png_ptr == NULL)
114 png_write_data(png_ptr, buf, (png_size_t)8);
115 /* Put the chunk name into png_ptr->chunk_name */
116 png_memcpy(png_ptr->chunk_name, chunk_name, 4);
118 png_reset_crc(png_ptr);
119 png_calculate_crc(png_ptr, chunk_name, (png_size_t)4);
128 png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length)
131 if (png_ptr == NULL)
135 png_write_data(png_ptr, data, length);
139 png_calculate_crc(png_ptr, data, length);
145 png_write_chunk_end(png_structp png_ptr)
149 if (png_ptr == NULL) return;
152 png_save_uint_32(buf, png_ptr->crc);
154 png_write_data(png_ptr, buf, (png_size_t)4);
173 /* Compress given text into storage in the png_ptr structure */
175 png_text_compress(png_structp png_ptr,
200 png_warning(png_ptr, msg);
202 png_warning(png_ptr, "Unknown compression type");
222 png_ptr->zstream.avail_in = (uInt)text_len;
223 png_ptr->zstream.next_in = (Bytef *)text;
224 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
225 png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
231 ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
235 if (png_ptr->zstream.msg != NULL)
236 png_error(png_ptr, png_ptr->zstream.msg);
238 png_error(png_ptr, "zlib error");
241 if (!(png_ptr->zstream.avail_out))
255 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
260 png_free(png_ptr, old_ptr);
263 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
270 (png_charp)png_malloc(png_ptr,
271 (png_uint_32)png_ptr->zbuf_size);
272 png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
273 png_ptr->zbuf_size);
277 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
278 png_ptr->zstream.next_out = png_ptr->zbuf;
281 } while (png_ptr->zstream.avail_in);
287 ret = deflate(&png_ptr->zstream, Z_FINISH);
292 if (!(png_ptr->zstream.avail_out))
307 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
312 png_free(png_ptr, old_ptr);
315 comp->output_ptr = (png_charpp)png_malloc(png_ptr,
322 (png_charp)png_malloc(png_ptr,
323 (png_uint_32)png_ptr->zbuf_size);
324 png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
325 png_ptr->zbuf_size);
329 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
330 png_ptr->zstream.next_out = png_ptr->zbuf;
336 if (png_ptr->zstream.msg != NULL)
337 png_error(png_ptr, png_ptr->zstream.msg);
339 png_error(png_ptr, "zlib error");
344 text_len = png_ptr->zbuf_size * comp->num_output_ptr;
345 if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
346 text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
353 png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
360 png_write_chunk_data(png_ptr, (png_bytep)comp->input,
368 png_write_chunk_data(png_ptr, (png_bytep)comp->output_ptr[i],
369 (png_size_t)png_ptr->zbuf_size);
370 png_free(png_ptr, comp->output_ptr[i]);
374 png_free(png_ptr, comp->output_ptr);
377 if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
378 png_write_chunk_data(png_ptr, png_ptr->zbuf,
379 (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
382 deflateReset(&png_ptr->zstream);
383 png_ptr->zstream.data_type = Z_BINARY;
392 png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
415 case 16: png_ptr->channels = 1; break;
416 default: png_error(png_ptr,
422 png_error(png_ptr, "Invalid bit depth for RGB image");
423 png_ptr->channels = 3;
431 case 8: png_ptr->channels = 1; break;
432 default: png_error(png_ptr, "Invalid bit depth for paletted image");
437 png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
438 png_ptr->channels = 2;
442 png_error(png_ptr, "Invalid bit depth for RGBA image");
443 png_ptr->channels = 4;
446 png_error(png_ptr, "Invalid image color type specified");
451 png_warning(png_ptr, "Invalid compression type specified");
466 !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
467 ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
474 png_warning(png_ptr, "Invalid filter type specified");
482 png_warning(png_ptr, "Invalid interlace type specified");
490 png_ptr->bit_depth = (png_byte)bit_depth;
491 png_ptr->color_type = (png_byte)color_type;
492 png_ptr->interlaced = (png_byte)interlace_type;
494 png_ptr->filter_type = (png_byte)filter_type;
496 png_ptr->compression_type = (png_byte)compression_type;
497 png_ptr->width = width;
498 png_ptr->height = height;
500 png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
501 png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
503 png_ptr->usr_width = png_ptr->width;
504 png_ptr->usr_bit_depth = png_ptr->bit_depth;
505 png_ptr->usr_channels = png_ptr->channels;
517 png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
520 png_ptr->zstream.zalloc = png_zalloc;
521 png_ptr->zstream.zfree = png_zfree;
522 png_ptr->zstream.opaque = (voidpf)png_ptr;
523 if (!(png_ptr->do_filter))
525 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
526 png_ptr->bit_depth < 8)
527 png_ptr->do_filter = PNG_FILTER_NONE;
529 png_ptr->do_filter = PNG_ALL_FILTERS;
531 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY))
533 if (png_ptr->do_filter != PNG_FILTER_NONE)
534 png_ptr->zlib_strategy = Z_FILTERED;
536 png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY;
538 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL))
539 png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
540 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL))
541 png_ptr->zlib_mem_level = 8;
542 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS))
543 png_ptr->zlib_window_bits = 15;
544 if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD))
545 png_ptr->zlib_method = 8;
546 ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level,
547 png_ptr->zlib_method, png_ptr->zlib_window_bits,
548 png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
551 if (ret == Z_VERSION_ERROR) png_error(png_ptr,
553 if (ret == Z_STREAM_ERROR) png_error(png_ptr,
555 if (ret == Z_MEM_ERROR) png_error(png_ptr,
557 png_error(png_ptr, "zlib failed to initialize compressor");
559 png_ptr->zstream.next_out = png_ptr->zbuf;
560 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
563 png_ptr->zstream.data_type = Z_BINARY;
565 png_ptr->mode = PNG_HAVE_IHDR;
573 png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
586 !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
590 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
592 png_error(png_ptr, "Invalid number of colors in palette");
596 png_warning(png_ptr, "Invalid number of colors in palette");
601 if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
603 png_warning(png_ptr,
608 png_ptr->num_palette = (png_uint_16)num_pal;
609 png_debug1(3, "num_palette = %d", png_ptr->num_palette);
611 png_write_chunk_start(png_ptr, (png_bytep)png_PLTE,
619 png_write_chunk_data(png_ptr, buf, (png_size_t)3);
631 png_write_chunk_data(png_ptr, buf, (png_size_t)3);
634 png_write_chunk_end(png_ptr);
635 png_ptr->mode |= PNG_HAVE_PLTE;
640 png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
650 if (!(png_ptr->mode & PNG_HAVE_IDAT) &&
651 png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
662 png_ptr->height < 16384 && png_ptr->width < 16384)
664 png_uint_32 uncompressed_idat_size = png_ptr->height *
665 ((png_ptr->width *
666 png_ptr->channels * png_ptr->bit_depth + 15) >> 3);
685 png_error(png_ptr,
689 png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
690 png_ptr->mode |= PNG_HAVE_IDAT;
695 png_write_IEND(png_structp png_ptr)
703 png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
705 png_ptr->mode |= PNG_HAVE_IEND;
712 png_write_gAMA(png_structp png_ptr, double file_gamma)
725 png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
730 png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
741 png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
749 png_write_sRGB(png_structp png_ptr, int srgb_intent)
759 png_warning(png_ptr,
762 png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1);
769 png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
788 if ((name_len = png_check_keyword(png_ptr, name,
793 png_warning(png_ptr, "Unknown compression type in iCCP chunk");
807 png_warning(png_ptr,
809 png_free(png_ptr, new_name);
815 png_warning(png_ptr,
817 png_free(png_ptr, new_name);
823 png_warning(png_ptr,
829 profile_len = png_text_compress(png_ptr, profile,
833 png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
836 png_write_chunk_data(png_ptr, (png_bytep)new_name,
840 png_write_compressed_data_out(png_ptr, &comp);
842 png_write_chunk_end(png_ptr);
843 png_free(png_ptr, new_name);
850 png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
867 if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0)
871 png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
873 png_write_chunk_data(png_ptr, (png_bytep)new_name,
875 png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, (png_size_t)1);
897 png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
919 png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
923 png_write_chunk_end(png_ptr);
924 png_free(png_ptr, new_name);
931 png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
947 png_ptr->usr_bit_depth);
952 png_warning(png_ptr, "Invalid sBIT depth specified");
962 if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
964 png_warning(png_ptr, "Invalid sBIT depth specified");
973 if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
975 png_warning(png_ptr, "Invalid sBIT depth specified");
981 png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size);
989 png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
1013 if (png_check_cHRM_fixed(png_ptr, int_white_x, int_white_y,
1031 png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
1037 png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
1051 if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y,
1067 png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
1076 png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
1088 if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
1090 png_warning(png_ptr, "Invalid number of transparent colors specified");
1094 png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans,
1100 if (tran->gray >= (1 << png_ptr->bit_depth))
1102 png_warning(png_ptr,
1107 png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
1115 if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
1117 png_warning(png_ptr,
1121 png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
1125 png_warning(png_ptr, "Can't write tRNS with an alpha channel");
1133 png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
1146 (png_ptr->num_palette ||
1147 (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) &&
1149 back->index >= png_ptr->num_palette)
1151 png_warning(png_ptr, "Invalid background palette index");
1155 png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1);
1162 if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
1164 png_warning(png_ptr,
1168 png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
1172 if (back->gray >= (1 << png_ptr->bit_depth))
1174 png_warning(png_ptr,
1179 png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
1187 png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
1197 if (num_hist > (int)png_ptr->num_palette)
1200 png_ptr->num_palette);
1201 png_warning(png_ptr, "Invalid number of histogram entries specified");
1205 png_write_chunk_start(png_ptr, (png_bytep)png_hIST,
1210 png_write_chunk_data(png_ptr, buf, (png_size_t)2);
1212 png_write_chunk_end(png_ptr);
1229 png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
1242 png_warning(png_ptr, "zero length keyword");
1248 *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
1251 png_warning(png_ptr, "Out of memory while procesing keyword");
1266 png_warning(png_ptr, msg);
1268 png_warning(png_ptr, "invalid character in keyword");
1283 png_warning(png_ptr, "trailing spaces removed from keyword");
1296 png_warning(png_ptr, "leading spaces removed from keyword");
1328 png_warning(png_ptr, "extra interior spaces removed from keyword");
1332 png_free(png_ptr, *new_key);
1334 png_warning(png_ptr, "Zero length keyword");
1339 png_warning(png_ptr, "keyword length must be 1 - 79 characters");
1351 png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
1362 if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
1371 png_write_chunk_start(png_ptr, (png_bytep)png_tEXt,
1379 png_write_chunk_data(png_ptr, (png_bytep)new_key,
1382 png_write_chunk_data(png_ptr, (png_bytep)text, (png_size_t)text_len);
1384 png_write_chunk_end(png_ptr);
1385 png_free(png_ptr, new_key);
1392 png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
1411 if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
1413 png_free(png_ptr, new_key);
1419 png_write_tEXt(png_ptr, new_key, text, (png_size_t)0);
1420 png_free(png_ptr, new_key);
1427 text_len = png_text_compress(png_ptr, text, text_len, compression,
1431 png_write_chunk_start(png_ptr, (png_bytep)png_zTXt,
1434 png_write_chunk_data(png_ptr, (png_bytep)new_key,
1436 png_free(png_ptr, new_key);
1440 png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1);
1442 png_write_compressed_data_out(png_ptr, &comp);
1445 png_write_chunk_end(png_ptr);
1452 png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
1471 if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
1474 if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang))==0)
1476 png_warning(png_ptr, "Empty language field in iTXt chunk");
1492 text_len = png_text_compress(png_ptr, text, text_len, compression-2,
1499 png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
1512 png_write_chunk_data(png_ptr, (png_bytep)new_key,
1523 png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
1526 png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf),
1528 png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf),
1530 png_write_compressed_data_out(png_ptr, &comp);
1532 png_write_chunk_end(png_ptr);
1533 png_free(png_ptr, new_key);
1534 png_free(png_ptr, new_lang);
1541 png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
1552 png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
1558 png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9);
1564 png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
1579 png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
1581 purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1;
1587 params_len = (png_uint_32p)png_malloc(png_ptr,
1601 png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len);
1602 png_write_chunk_data(png_ptr, (png_bytep)new_purpose,
1608 png_write_chunk_data(png_ptr, buf, (png_size_t)10);
1609 png_write_chunk_data(png_ptr, (png_bytep)units, (png_size_t)units_len);
1611 png_free(png_ptr, new_purpose);
1615 png_write_chunk_data(png_ptr, (png_bytep)params[i],
1619 png_free(png_ptr, params_len);
1620 png_write_chunk_end(png_ptr);
1628 png_write_sCAL(png_structp png_ptr, int unit, double width, double height)
1663 png_write_chunk(png_ptr, (png_bytep)png_sCAL, (png_bytep)buf, total_len);
1668 png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
1684 png_warning(png_ptr, "Can't write sCAL (buffer too small)");
1693 png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len);
1702 png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
1714 png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
1720 png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9);
1729 png_write_tIME(png_structp png_ptr, png_timep mod_time)
1742 png_warning(png_ptr, "Invalid time specified for tIME chunk");
1753 png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7);
1759 png_write_start_row(png_structp png_ptr)
1782 png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
1785 png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
1787 png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
1791 if (png_ptr->do_filter & PNG_FILTER_SUB)
1793 png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
1794 (png_uint_32)(png_ptr->rowbytes + 1));
1795 png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
1799 if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
1802 png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
1805 if (png_ptr->do_filter & PNG_FILTER_UP)
1807 png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
1808 (png_uint_32)(png_ptr->rowbytes + 1));
1809 png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
1812 if (png_ptr->do_filter & PNG_FILTER_AVG)
1814 png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
1815 (png_uint_32)(png_ptr->rowbytes + 1));
1816 png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
1819 if (png_ptr->do_filter & PNG_FILTER_PAETH)
1821 png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
1822 (png_uint_32)(png_ptr->rowbytes + 1));
1823 png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
1830 if (png_ptr->interlaced)
1832 if (!(png_ptr->transformations & PNG_INTERLACE))
1834 png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
1836 png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
1841 png_ptr->num_rows = png_ptr->height;
1842 png_ptr->usr_width = png_ptr->width;
1848 png_ptr->num_rows = png_ptr->height;
1849 png_ptr->usr_width = png_ptr->width;
1851 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1852 png_ptr->zstream.next_out = png_ptr->zbuf;
1857 png_write_finish_row(png_structp png_ptr)
1880 png_ptr->row_number++;
1883 if (png_ptr->row_number < png_ptr->num_rows)
1888 if (png_ptr->interlaced)
1890 png_ptr->row_number = 0;
1891 if (png_ptr->transformations & PNG_INTERLACE)
1893 png_ptr->pass++;
1900 png_ptr->pass++;
1901 if (png_ptr->pass >= 7)
1903 png_ptr->usr_width = (png_ptr->width +
1904 png_pass_inc[png_ptr->pass] - 1 -
1905 png_pass_start[png_ptr->pass]) /
1906 png_pass_inc[png_ptr->pass];
1907 png_ptr->num_rows = (png_ptr->height +
1908 png_pass_yinc[png_ptr->pass] - 1 -
1909 png_pass_ystart[png_ptr->pass]) /
1910 png_pass_yinc[png_ptr->pass];
1911 if (png_ptr->transformations & PNG_INTERLACE)
1913 } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
1918 if (png_ptr->pass < 7)
1920 if (png_ptr->prev_row != NULL)
1921 png_memset(png_ptr->prev_row, 0,
1922 (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
1923 png_ptr->usr_bit_depth, png_ptr->width)) + 1);
1934 ret = deflate(&png_ptr->zstream, Z_FINISH);
1939 if (!(png_ptr->zstream.avail_out))
1941 png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
1942 png_ptr->zstream.next_out = png_ptr->zbuf;
1943 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1948 if (png_ptr->zstream.msg != NULL)
1949 png_error(png_ptr, png_ptr->zstream.msg);
1951 png_error(png_ptr, "zlib error");
1956 if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
1958 png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size -
1959 png_ptr->zstream.avail_out);
1962 deflateReset(&png_ptr->zstream);
1963 png_ptr->zstream.data_type = Z_BINARY;
2145 png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
2151 png_byte filter_to_do = png_ptr->do_filter;
2154 int num_p_filters = (int)png_ptr->num_prev_filters;
2160 if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)
2170 prev_row = png_ptr->prev_row;
2172 best_row = png_ptr->row_buf;
2217 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2227 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
2229 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2231 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2240 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
2242 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
2260 for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
2270 best_row = png_ptr->sub_row;
2285 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2294 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
2296 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2298 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2303 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2305 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2315 for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
2334 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2343 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
2345 sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
2347 sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
2352 sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2354 sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
2367 best_row = png_ptr->sub_row;
2377 for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
2383 best_row = png_ptr->up_row;
2395 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2404 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
2406 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2408 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2413 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
2415 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
2425 for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
2437 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2446 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
2448 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2450 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2455 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
2457 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
2470 best_row = png_ptr->up_row;
2479 for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
2489 best_row = png_ptr->avg_row;
2500 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2509 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
2511 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2513 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2518 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
2520 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
2530 for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
2549 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2558 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
2560 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2562 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2567 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
2569 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
2582 best_row = png_ptr->avg_row;
2591 for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
2622 best_row = png_ptr->paeth_row;
2633 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2642 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
2644 lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
2646 lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
2651 lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2653 lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2663 for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
2714 if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
2723 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
2725 sumlo = (sumlo * png_ptr->filter_weights[j]) >>
2727 sumhi = (sumhi * png_ptr->filter_weights[j]) >>
2732 sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2734 sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
2746 best_row = png_ptr->paeth_row;
2752 png_write_filtered_row(png_ptr, best_row);
2757 if (png_ptr->num_prev_filters > 0)
2762 png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
2764 png_ptr->prev_filters[j] = best_row[0];
2773 png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
2780 png_ptr->zstream.next_in = filtered_row;
2781 png_ptr->zstream.avail_in = (uInt)png_ptr->row_info.rowbytes + 1;
2788 ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
2792 if (png_ptr->zstream.msg != NULL)
2793 png_error(png_ptr, png_ptr->zstream.msg);
2795 png_error(png_ptr, "zlib error");
2799 if (!(png_ptr->zstream.avail_out))
2802 png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
2803 png_ptr->zstream.next_out = png_ptr->zbuf;
2804 png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
2807 } while (png_ptr->zstream.avail_in);
2810 if (png_ptr->prev_row != NULL)
2814 tptr = png_ptr->prev_row;
2815 png_ptr->prev_row = png_ptr->row_buf;
2816 png_ptr->row_buf = tptr;
2820 png_write_finish_row(png_ptr);
2823 png_ptr->flush_rows++;
2825 if (png_ptr->flush_dist > 0 &&
2826 png_ptr->flush_rows >= png_ptr->flush_dist)
2828 png_write_flush(png_ptr);
