Lines Matching full:png_ptr
51 png_write_sig(png_structrp png_ptr)
57 png_ptr->io_state = PNG_IO_WRITING | PNG_IO_SIGNATURE;
61 png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
62 (png_size_t)(8 - png_ptr->sig_bytes));
64 if (png_ptr->sig_bytes < 3)
65 png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
73 png_write_chunk_header(png_structrp png_ptr, png_uint_32 chunk_name,
83 if (png_ptr == NULL)
90 png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_HDR;
96 png_write_data(png_ptr, buf, 8);
98 /* Put the chunk name into png_ptr->chunk_name */
99 png_ptr->chunk_name = chunk_name;
102 png_reset_crc(png_ptr);
104 png_calculate_crc(png_ptr, buf + 4, 4);
110 png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_DATA;
115 png_write_chunk_start(png_structrp png_ptr, png_const_bytep chunk_string,
118 png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length);
127 png_write_chunk_data(png_structrp png_ptr, png_const_bytep data,
131 if (png_ptr == NULL)
136 png_write_data(png_ptr, data, length);
141 png_calculate_crc(png_ptr, data, length);
147 png_write_chunk_end(png_structrp png_ptr)
151 if (png_ptr == NULL) return;
157 png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_CRC;
161 png_save_uint_32(buf, png_ptr->crc);
163 png_write_data(png_ptr, buf, (png_size_t)4);
176 png_write_complete_chunk(png_structrp png_ptr, png_uint_32 chunk_name,
179 if (png_ptr == NULL)
184 png_error(png_ptr, "length exceeds PNG maximum");
186 png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length);
187 png_write_chunk_data(png_ptr, data, length);
188 png_write_chunk_end(png_ptr);
193 png_write_chunk(png_structrp png_ptr, png_const_bytep chunk_string,
196 png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data,
205 png_image_size(png_structrp png_ptr)
210 png_uint_32 h = png_ptr->height;
212 if (png_ptr->rowbytes < 32768 && h < 32768)
214 if (png_ptr->interlaced != 0)
219 png_uint_32 w = png_ptr->width;
220 unsigned int pd = png_ptr->pixel_depth;
236 return (png_ptr->rowbytes+1) * h;
293 png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
296 if (png_ptr->zowner != 0)
304 PNG_STRING_FROM_CHUNK(msg+6, png_ptr->zowner);
312 png_warning(png_ptr, msg);
315 if (png_ptr->zowner == png_IDAT) /* don't steal from IDAT */
317 png_ptr->zstream.msg = PNGZ_MSG_CAST("in use by IDAT");
321 png_ptr->zowner = 0;
323 png_error(png_ptr, msg);
328 int level = png_ptr->zlib_level;
329 int method = png_ptr->zlib_method;
330 int windowBits = png_ptr->zlib_window_bits;
331 int memLevel = png_ptr->zlib_mem_level;
337 if ((png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY) != 0)
338 strategy = png_ptr->zlib_strategy;
340 else if (png_ptr->do_filter != PNG_FILTER_NONE)
350 level = png_ptr->zlib_text_level;
351 method = png_ptr->zlib_text_method;
352 windowBits = png_ptr->zlib_text_window_bits;
353 memLevel = png_ptr->zlib_text_mem_level;
354 strategy = png_ptr->zlib_text_strategy;
389 if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0 &&
390 (png_ptr->zlib_set_level != level ||
391 png_ptr->zlib_set_method != method ||
392 png_ptr->zlib_set_window_bits != windowBits ||
393 png_ptr->zlib_set_mem_level != memLevel ||
394 png_ptr->zlib_set_strategy != strategy))
396 if (deflateEnd(&png_ptr->zstream) != Z_OK)
397 png_warning(png_ptr, "deflateEnd failed (ignored)");
399 png_ptr->flags &= ~PNG_FLAG_ZSTREAM_INITIALIZED;
405 png_ptr->zstream.next_in = NULL;
406 png_ptr->zstream.avail_in = 0;
407 png_ptr->zstream.next_out = NULL;
408 png_ptr->zstream.avail_out = 0;
413 if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0)
414 ret = deflateReset(&png_ptr->zstream);
418 ret = deflateInit2(&png_ptr->zstream, level, method, windowBits,
422 png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED;
429 png_ptr->zowner = owner;
432 png_zstream_error(png_ptr, ret);
440 png_free_buffer_list(png_structrp png_ptr, png_compression_bufferp *listp)
452 png_free(png_ptr, list);
489 png_text_compress(png_structrp png_ptr, png_uint_32 chunk_name,
504 ret = png_deflate_claim(png_ptr, chunk_name, comp->input_len);
516 png_compression_bufferp *end = &png_ptr->zbuffer_list;
521 png_ptr->zstream.next_in = PNGZ_INPUT_CAST(comp->input);
522 png_ptr->zstream.avail_in = 0; /* Set below */
523 png_ptr->zstream.next_out = comp->output;
524 png_ptr->zstream.avail_out = (sizeof comp->output);
526 output_len = png_ptr->zstream.avail_out;
537 png_ptr->zstream.avail_in = avail_in;
539 if (png_ptr->zstream.avail_out == 0)
559 (png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr)));
572 png_ptr->zstream.next_out = next->output;
573 png_ptr->zstream.avail_out = png_ptr->zbuffer_size;
574 output_len += png_ptr->zstream.avail_out;
581 ret = deflate(&png_ptr->zstream,
587 input_len += png_ptr->zstream.avail_in;
588 png_ptr->zstream.avail_in = 0; /* safety */
595 output_len -= png_ptr->zstream.avail_out;
596 png_ptr->zstream.avail_out = 0; /* safety */
605 png_ptr->zstream.msg = PNGZ_MSG_CAST("compressed data too long");
610 png_zstream_error(png_ptr, ret);
613 png_ptr->zowner = 0;
638 png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp)
643 png_compression_buffer *next = png_ptr->zbuffer_list;
650 png_write_chunk_data(png_ptr, output, avail);
657 avail = png_ptr->zbuffer_size;
664 png_error(png_ptr, "error writing ancillary chunked compressed data");
673 png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height,
695 png_ptr->channels = 1; break;
698 png_error(png_ptr,
709 png_error(png_ptr, "Invalid bit depth for RGB image");
711 png_ptr->channels = 3;
721 png_ptr->channels = 1;
725 png_error(png_ptr, "Invalid bit depth for paletted image");
735 png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
737 png_ptr->channels = 2;
746 png_error(png_ptr, "Invalid bit depth for RGBA image");
748 png_ptr->channels = 4;
752 png_error(png_ptr, "Invalid image color type specified");
757 png_warning(png_ptr, "Invalid compression type specified");
772 !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 &&
773 ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
780 png_warning(png_ptr, "Invalid filter type specified");
788 png_warning(png_ptr, "Invalid interlace type specified");
796 png_ptr->bit_depth = (png_byte)bit_depth;
797 png_ptr->color_type = (png_byte)color_type;
798 png_ptr->interlaced = (png_byte)interlace_type;
800 png_ptr->filter_type = (png_byte)filter_type;
802 png_ptr->compression_type = (png_byte)compression_type;
803 png_ptr->width = width;
804 png_ptr->height = height;
806 png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
807 png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
809 png_ptr->usr_width = png_ptr->width;
810 png_ptr->usr_bit_depth = png_ptr->bit_depth;
811 png_ptr->usr_channels = png_ptr->channels;
823 png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
825 if ((png_ptr->do_filter) == PNG_NO_FILTERS)
827 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
828 png_ptr->bit_depth < 8)
829 png_ptr->do_filter = PNG_FILTER_NONE;
832 png_ptr->do_filter = PNG_ALL_FILTERS;
835 png_ptr->mode = PNG_HAVE_IHDR; /* not READY_FOR_ZTXT */
843 png_write_PLTE(png_structrp png_ptr, png_const_colorp palette,
852 max_palette_length = (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
853 (1 << png_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
857 (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 &&
861 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
863 png_error(png_ptr, "Invalid number of colors in palette");
868 png_warning(png_ptr, "Invalid number of colors in palette");
873 if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0)
875 png_warning(png_ptr,
881 png_ptr->num_palette = (png_uint_16)num_pal;
882 png_debug1(3, "num_palette = %d", png_ptr->num_palette);
884 png_write_chunk_header(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
892 png_write_chunk_data(png_ptr, buf, (png_size_t)3);
906 png_write_chunk_data(png_ptr, buf, (png_size_t)3);
910 png_write_chunk_end(png_ptr);
911 png_ptr->mode |= PNG_HAVE_PLTE;
927 * The routine manages the acquire and release of the png_ptr->zstream by
928 * checking and (at the end) clearing png_ptr->zowner; it does some sanity
932 png_compress_IDAT(png_structrp png_ptr, png_const_bytep input,
935 if (png_ptr->zowner != png_IDAT)
942 if (png_ptr->zbuffer_list == NULL)
944 png_ptr->zbuffer_list = png_voidcast(png_compression_bufferp,
945 png_malloc(png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr)));
946 png_ptr->zbuffer_list->next = NULL;
950 png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list->next);
953 if (png_deflate_claim(png_ptr, png_IDAT, png_image_size(png_ptr)) != Z_OK)
954 png_error(png_ptr, png_ptr->zstream.msg);
956 /* The output state is maintained in png_ptr->zstream, so it must be
959 png_ptr->zstream.next_out = png_ptr->zbuffer_list->output;
960 png_ptr->zstream.avail_out = png_ptr->zbuffer_size;
967 png_ptr->zstream.next_in = PNGZ_INPUT_CAST(input);
968 png_ptr->zstream.avail_in = 0; /* set below */
979 png_ptr->zstream.avail_in = avail;
982 ret = deflate(&png_ptr->zstream, input_len > 0 ? Z_NO_FLUSH : flush);
985 input_len += png_ptr->zstream.avail_in;
986 png_ptr->zstream.avail_in = 0;
992 if (png_ptr->zstream.avail_out == 0)
994 png_bytep data = png_ptr->zbuffer_list->output;
995 uInt size = png_ptr->zbuffer_size;
1001 if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 &&
1002 png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
1003 optimize_cmf(data, png_image_size(png_ptr));
1007 png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1008 png_ptr->mode |= PNG_HAVE_IDAT;
1010 png_ptr->zstream.next_out = data;
1011 png_ptr->zstream.avail_out = size;
1033 png_error(png_ptr, "Z_OK on Z_FINISH with output space");
1044 png_bytep data = png_ptr->zbuffer_list->output;
1045 uInt size = png_ptr->zbuffer_size - png_ptr->zstream.avail_out;
1048 if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 &&
1049 png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
1050 optimize_cmf(data, png_image_size(png_ptr));
1054 png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1055 png_ptr->zstream.avail_out = 0;
1056 png_ptr->zstream.next_out = NULL;
1057 png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT;
1059 png_ptr->zowner = 0; /* Release the stream */
1066 png_zstream_error(png_ptr, ret);
1067 png_error(png_ptr, png_ptr->zstream.msg);
1074 png_write_IEND(png_structrp png_ptr)
1078 png_write_complete_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
1079 png_ptr->mode |= PNG_HAVE_IEND;
1085 png_write_gAMA_fixed(png_structrp png_ptr, png_fixed_point file_gamma)
1093 png_write_complete_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
1100 png_write_sRGB(png_structrp png_ptr, int srgb_intent)
1107 png_warning(png_ptr,
1111 png_write_complete_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
1118 png_write_iCCP(png_structrp png_ptr, png_const_charp name,
1133 png_error(png_ptr, "No profile for iCCP chunk"); /* internal error */
1138 png_error(png_ptr, "ICC profile too short");
1142 png_error(png_ptr, "ICC profile length invalid (not a multiple of 4)");
1148 png_error(png_ptr, "Profile length does not match profile");
1151 name_len = png_check_keyword(png_ptr, name, new_name);
1154 png_error(png_ptr, "iCCP: invalid keyword");
1164 if (png_text_compress(png_ptr, png_iCCP, &comp, name_len) != Z_OK)
1165 png_error(png_ptr, png_ptr->zstream.msg);
1167 png_write_chunk_header(png_ptr, png_iCCP, name_len + comp.output_len);
1169 png_write_chunk_data(png_ptr, new_name, name_len);
1171 png_write_compressed_data_out(png_ptr, &comp);
1173 png_write_chunk_end(png_ptr);
1180 png_write_sPLT(png_structrp png_ptr, png_const_sPLT_tp spalette)
1194 name_len = png_check_keyword(png_ptr, spalette->name, new_name);
1197 png_error(png_ptr, "sPLT: invalid keyword");
1200 png_write_chunk_header(png_ptr, png_sPLT,
1203 png_write_chunk_data(png_ptr, (png_bytep)new_name,
1206 png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1);
1230 png_write_chunk_data(png_ptr, entrybuf, entry_size);
1254 png_write_chunk_data(png_ptr, entrybuf, entry_size);
1258 png_write_chunk_end(png_ptr);
1265 png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type)
1278 png_ptr->usr_bit_depth);
1284 png_warning(png_ptr, "Invalid sBIT depth specified");
1296 if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
1298 png_warning(png_ptr, "Invalid sBIT depth specified");
1308 if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
1310 png_warning(png_ptr, "Invalid sBIT depth specified");
1317 png_write_complete_chunk(png_ptr, png_sBIT, buf, size);
1324 png_write_cHRM_fixed(png_structrp png_ptr, const png_xy *xy)
1343 png_write_complete_chunk(png_ptr, png_cHRM, buf, 32);
1350 png_write_tRNS(png_structrp png_ptr, png_const_bytep trans_alpha,
1359 if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
1361 png_app_warning(png_ptr,
1367 png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha,
1374 if (tran->gray >= (1 << png_ptr->bit_depth))
1376 png_app_warning(png_ptr,
1383 png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
1393 if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0)
1398 png_app_warning(png_ptr,
1403 png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
1408 png_app_warning(png_ptr, "Can't write tRNS with an alpha channel");
1416 png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type)
1426 (png_ptr->num_palette != 0 ||
1427 (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0) &&
1429 back->index >= png_ptr->num_palette)
1431 png_warning(png_ptr, "Invalid background palette index");
1436 png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
1445 if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0)
1450 png_warning(png_ptr,
1457 png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
1462 if (back->gray >= (1 << png_ptr->bit_depth))
1464 png_warning(png_ptr,
1471 png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
1479 png_write_eXIf(png_structrp png_ptr, png_bytep exif, int num_exif)
1486 png_write_chunk_header(png_ptr, png_eXIf, (png_uint_32)(num_exif));
1491 png_write_chunk_data(png_ptr, buf, (png_size_t)1);
1494 png_write_chunk_end(png_ptr);
1501 png_write_hIST(png_structrp png_ptr, png_const_uint_16p hist, int num_hist)
1508 if (num_hist > (int)png_ptr->num_palette)
1511 png_ptr->num_palette);
1513 png_warning(png_ptr, "Invalid number of histogram entries specified");
1517 png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
1522 png_write_chunk_data(png_ptr, buf, (png_size_t)2);
1525 png_write_chunk_end(png_ptr);
1532 png_write_tEXt(png_structrp png_ptr, png_const_charp key, png_const_charp text,
1540 key_len = png_check_keyword(png_ptr, key, new_key);
1543 png_error(png_ptr, "tEXt: invalid keyword");
1552 png_error(png_ptr, "tEXt: text too long");
1555 png_write_chunk_header(png_ptr, png_tEXt,
1563 png_write_chunk_data(png_ptr, new_key, key_len + 1);
1566 png_write_chunk_data(png_ptr, (png_const_bytep)text, text_len);
1568 png_write_chunk_end(png_ptr);
1575 png_write_zTXt(png_structrp png_ptr, png_const_charp key, png_const_charp text,
1586 png_write_tEXt(png_ptr, key, text, 0);
1591 png_error(png_ptr, "zTXt: invalid compression type");
1593 key_len = png_check_keyword(png_ptr, key, new_key);
1596 png_error(png_ptr, "zTXt: invalid keyword");
1606 if (png_text_compress(png_ptr, png_zTXt, &comp, key_len) != Z_OK)
1607 png_error(png_ptr, png_ptr->zstream.msg);
1610 png_write_chunk_header(png_ptr, png_zTXt, key_len + comp.output_len);
1613 png_write_chunk_data(png_ptr, new_key, key_len);
1616 png_write_compressed_data_out(png_ptr, &comp);
1619 png_write_chunk_end(png_ptr);
1626 png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key,
1636 key_len = png_check_keyword(png_ptr, key, new_key);
1639 png_error(png_ptr, "iTXt: invalid keyword");
1655 png_error(png_ptr, "iTXt: invalid compression");
1692 if (png_text_compress(png_ptr, png_iTXt, &comp, prefix_len) != Z_OK)
1693 png_error(png_ptr, png_ptr->zstream.msg);
1699 png_error(png_ptr, "iTXt: uncompressed text too long");
1705 png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len);
1707 png_write_chunk_data(png_ptr, new_key, key_len);
1709 png_write_chunk_data(png_ptr, (png_const_bytep)lang, lang_len);
1711 png_write_chunk_data(png_ptr, (png_const_bytep)lang_key, lang_key_len);
1714 png_write_compressed_data_out(png_ptr, &comp);
1717 png_write_chunk_data(png_ptr, (png_const_bytep)text, comp.output_len);
1719 png_write_chunk_end(png_ptr);
1726 png_write_oFFs(png_structrp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
1734 png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
1740 png_write_complete_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
1746 png_write_pCAL(png_structrp png_ptr, png_charp purpose, png_int_32 X0,
1760 png_error(png_ptr, "Unrecognized equation type for pCAL chunk");
1762 purpose_len = png_check_keyword(png_ptr, purpose, new_purpose);
1765 png_error(png_ptr, "pCAL: invalid keyword");
1774 params_len = (png_size_tp)png_malloc(png_ptr,
1789 png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len);
1790 png_write_chunk_data(png_ptr, new_purpose, purpose_len);
1795 png_write_chunk_data(png_ptr, buf, (png_size_t)10);
1796 png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len);
1800 png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]);
1803 png_free(png_ptr, params_len);
1804 png_write_chunk_end(png_ptr);
1811 png_write_sCAL_s(png_structrp png_ptr, int unit, png_const_charp width,
1825 png_warning(png_ptr, "Can't write sCAL (buffer too small)");
1834 png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len);
1841 png_write_pHYs(png_structrp png_ptr, png_uint_32 x_pixels_per_unit,
1850 png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
1856 png_write_complete_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
1865 png_write_tIME(png_structrp png_ptr, png_const_timep mod_time)
1875 png_warning(png_ptr, "Invalid time specified for tIME chunk");
1886 png_write_complete_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
1892 png_write_start_row(png_structrp png_ptr)
1919 usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth;
1920 buf_size = PNG_ROWBYTES(usr_pixel_depth, png_ptr->width) + 1;
1923 png_ptr->transformed_pixel_depth = png_ptr->pixel_depth;
1924 png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth;
1927 png_ptr->row_buf = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size));
1929 png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
1932 filters = png_ptr->do_filter;
1934 if (png_ptr->height == 1)
1937 if (png_ptr->width == 1)
1943 png_ptr->do_filter = filters;
1946 PNG_FILTER_PAETH)) != 0) && png_ptr->try_row == NULL)
1950 png_ptr->try_row = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size));
1965 png_ptr->tst_row = png_voidcast(png_bytep, png_malloc(png_ptr,
1973 png_ptr->prev_row = png_voidcast(png_bytep,
1974 png_calloc(png_ptr, buf_size));
1979 if (png_ptr->interlaced != 0)
1981 if ((png_ptr->transformations & PNG_INTERLACE) == 0)
1983 png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
1986 png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
1992 png_ptr->num_rows = png_ptr->height;
1993 png_ptr->usr_width = png_ptr->width;
2000 png_ptr->num_rows = png_ptr->height;
2001 png_ptr->usr_width = png_ptr->width;
2007 png_write_finish_row(png_structrp png_ptr)
2028 png_ptr->row_number++;
2031 if (png_ptr->row_number < png_ptr->num_rows)
2036 if (png_ptr->interlaced != 0)
2038 png_ptr->row_number = 0;
2039 if ((png_ptr->transformations & PNG_INTERLACE) != 0)
2041 png_ptr->pass++;
2049 png_ptr->pass++;
2051 if (png_ptr->pass >= 7)
2054 png_ptr->usr_width = (png_ptr->width +
2055 png_pass_inc[png_ptr->pass] - 1 -
2056 png_pass_start[png_ptr->pass]) /
2057 png_pass_inc[png_ptr->pass];
2059 png_ptr->num_rows = (png_ptr->height +
2060 png_pass_yinc[png_ptr->pass] - 1 -
2061 png_pass_ystart[png_ptr->pass]) /
2062 png_pass_yinc[png_ptr->pass];
2064 if ((png_ptr->transformations & PNG_INTERLACE) != 0)
2067 } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
2072 if (png_ptr->pass < 7)
2074 if (png_ptr->prev_row != NULL)
2075 memset(png_ptr->prev_row, 0,
2076 (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
2077 png_ptr->usr_bit_depth, png_ptr->width)) + 1);
2086 png_compress_IDAT(png_ptr, NULL, 0, Z_FINISH);
2276 png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
2281 png_setup_sub_row(png_structrp png_ptr, const png_uint_32 bpp,
2289 png_ptr->try_row[0] = PNG_FILTER_VALUE_SUB;
2291 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1; i < bpp;
2302 for (lp = png_ptr->row_buf + 1; i < row_bytes;
2320 png_setup_sub_row_only(png_structrp png_ptr, const png_uint_32 bpp,
2326 png_ptr->try_row[0] = PNG_FILTER_VALUE_SUB;
2328 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1; i < bpp;
2334 for (lp = png_ptr->row_buf + 1; i < row_bytes;
2342 png_setup_up_row(png_structrp png_ptr, const png_size_t row_bytes,
2350 png_ptr->try_row[0] = PNG_FILTER_VALUE_UP;
2352 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2353 pp = png_ptr->prev_row + 1; i < row_bytes;
2370 png_setup_up_row_only(png_structrp png_ptr, const png_size_t row_bytes)
2375 png_ptr->try_row[0] = PNG_FILTER_VALUE_UP;
2377 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2378 pp = png_ptr->prev_row + 1; i < row_bytes;
2386 png_setup_avg_row(png_structrp png_ptr, const png_uint_32 bpp,
2394 png_ptr->try_row[0] = PNG_FILTER_VALUE_AVG;
2396 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2397 pp = png_ptr->prev_row + 1; i < bpp; i++)
2408 for (lp = png_ptr->row_buf + 1; i < row_bytes; i++)
2426 png_setup_avg_row_only(png_structrp png_ptr, const png_uint_32 bpp,
2432 png_ptr->try_row[0] = PNG_FILTER_VALUE_AVG;
2434 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2435 pp = png_ptr->prev_row + 1; i < bpp; i++)
2440 for (lp = png_ptr->row_buf + 1; i < row_bytes; i++)
2448 png_setup_paeth_row(png_structrp png_ptr, const png_uint_32 bpp,
2456 png_ptr->try_row[0] = PNG_FILTER_VALUE_PAETH;
2458 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2459 pp = png_ptr->prev_row + 1; i < bpp; i++)
2470 for (lp = png_ptr->row_buf + 1, cp = png_ptr->prev_row + 1; i < row_bytes;
2509 png_setup_paeth_row_only(png_structrp png_ptr, const png_uint_32 bpp,
2515 png_ptr->try_row[0] = PNG_FILTER_VALUE_PAETH;
2517 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2518 pp = png_ptr->prev_row + 1; i < bpp; i++)
2523 for (lp = png_ptr->row_buf + 1, cp = png_ptr->prev_row + 1; i < row_bytes;
2553 png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
2556 png_write_filtered_row(png_ptr, png_ptr->row_buf, row_info->rowbytes+1);
2558 unsigned int filter_to_do = png_ptr->do_filter;
2570 row_buf = png_ptr->row_buf;
2602 best_row = png_ptr->row_buf;
2641 png_setup_sub_row_only(png_ptr, bpp, row_bytes);
2642 best_row = png_ptr->try_row;
2650 sum = png_setup_sub_row(png_ptr, bpp, row_bytes, lmins);
2655 best_row = png_ptr->try_row;
2656 if (png_ptr->tst_row != NULL)
2658 png_ptr->try_row = png_ptr->tst_row;
2659 png_ptr->tst_row = best_row;
2667 png_setup_up_row_only(png_ptr, row_bytes);
2668 best_row = png_ptr->try_row;
2676 sum = png_setup_up_row(png_ptr, row_bytes, lmins);
2681 best_row = png_ptr->try_row;
2682 if (png_ptr->tst_row != NULL)
2684 png_ptr->try_row = png_ptr->tst_row;
2685 png_ptr->tst_row = best_row;
2693 png_setup_avg_row_only(png_ptr, bpp, row_bytes);
2694 best_row = png_ptr->try_row;
2702 sum= png_setup_avg_row(png_ptr, bpp, row_bytes, lmins);
2707 best_row = png_ptr->try_row;
2708 if (png_ptr->tst_row != NULL)
2710 png_ptr->try_row = png_ptr->tst_row;
2711 png_ptr->tst_row = best_row;
2719 png_setup_paeth_row_only(png_ptr, bpp, row_bytes);
2720 best_row = png_ptr->try_row;
2728 sum = png_setup_paeth_row(png_ptr, bpp, row_bytes, lmins);
2732 best_row = png_ptr->try_row;
2733 if (png_ptr->tst_row != NULL)
2735 png_ptr->try_row = png_ptr->tst_row;
2736 png_ptr->tst_row = best_row;
2742 png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
2750 png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
2757 png_compress_IDAT(png_ptr, filtered_row, full_row_length, Z_NO_FLUSH);
2761 if (png_ptr->prev_row != NULL)
2765 tptr = png_ptr->prev_row;
2766 png_ptr->prev_row = png_ptr->row_buf;
2767 png_ptr->row_buf = tptr;
2772 png_write_finish_row(png_ptr);
2775 png_ptr->flush_rows++;
2777 if (png_ptr->flush_dist > 0 &&
2778 png_ptr->flush_rows >= png_ptr->flush_dist)
2780 png_write_flush(png_ptr);
