Lines Matching refs: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 (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, size_t length)
130 if (png_ptr == NULL)
135 png_write_data(png_ptr, data, length);
140 png_calculate_crc(png_ptr, data, length);
146 png_write_chunk_end(png_structrp png_ptr)
150 if (png_ptr == NULL) return;
156 png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_CRC;
160 png_save_uint_32(buf, png_ptr->crc);
162 png_write_data(png_ptr, buf, 4);
175 png_write_complete_chunk(png_structrp png_ptr, png_uint_32 chunk_name,
178 if (png_ptr == NULL)
183 png_error(png_ptr, "length exceeds PNG maximum");
185 png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length);
186 png_write_chunk_data(png_ptr, data, length);
187 png_write_chunk_end(png_ptr);
192 png_write_chunk(png_structrp png_ptr, png_const_bytep chunk_string,
195 png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data,
204 png_image_size(png_structrp png_ptr)
209 png_uint_32 h = png_ptr->height;
211 if (png_ptr->rowbytes < 32768 && h < 32768)
213 if (png_ptr->interlaced != 0)
218 png_uint_32 w = png_ptr->width;
219 unsigned int pd = png_ptr->pixel_depth;
235 return (png_ptr->rowbytes+1) * h;
292 png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
295 if (png_ptr->zowner != 0)
303 PNG_STRING_FROM_CHUNK(msg+6, png_ptr->zowner);
311 png_warning(png_ptr, msg);
314 if (png_ptr->zowner == png_IDAT) /* don't steal from IDAT */
316 png_ptr->zstream.msg = PNGZ_MSG_CAST("in use by IDAT");
320 png_ptr->zowner = 0;
322 png_error(png_ptr, msg);
327 int level = png_ptr->zlib_level;
328 int method = png_ptr->zlib_method;
329 int windowBits = png_ptr->zlib_window_bits;
330 int memLevel = png_ptr->zlib_mem_level;
336 if ((png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY) != 0)
337 strategy = png_ptr->zlib_strategy;
339 else if (png_ptr->do_filter != PNG_FILTER_NONE)
349 level = png_ptr->zlib_text_level;
350 method = png_ptr->zlib_text_method;
351 windowBits = png_ptr->zlib_text_window_bits;
352 memLevel = png_ptr->zlib_text_mem_level;
353 strategy = png_ptr->zlib_text_strategy;
388 if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0 &&
389 (png_ptr->zlib_set_level != level ||
390 png_ptr->zlib_set_method != method ||
391 png_ptr->zlib_set_window_bits != windowBits ||
392 png_ptr->zlib_set_mem_level != memLevel ||
393 png_ptr->zlib_set_strategy != strategy))
395 if (deflateEnd(&png_ptr->zstream) != Z_OK)
396 png_warning(png_ptr, "deflateEnd failed (ignored)");
398 png_ptr->flags &= ~PNG_FLAG_ZSTREAM_INITIALIZED;
404 png_ptr->zstream.next_in = NULL;
405 png_ptr->zstream.avail_in = 0;
406 png_ptr->zstream.next_out = NULL;
407 png_ptr->zstream.avail_out = 0;
412 if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0)
413 ret = deflateReset(&png_ptr->zstream);
417 ret = deflateInit2(&png_ptr->zstream, level, method, windowBits,
421 png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED;
428 png_ptr->zowner = owner;
431 png_zstream_error(png_ptr, ret);
439 png_free_buffer_list(png_structrp png_ptr, png_compression_bufferp *listp)
451 png_free(png_ptr, list);
488 png_text_compress(png_structrp png_ptr, png_uint_32 chunk_name,
503 ret = png_deflate_claim(png_ptr, chunk_name, comp->input_len);
515 png_compression_bufferp *end = &png_ptr->zbuffer_list;
520 png_ptr->zstream.next_in = PNGZ_INPUT_CAST(comp->input);
521 png_ptr->zstream.avail_in = 0; /* Set below */
522 png_ptr->zstream.next_out = comp->output;
523 png_ptr->zstream.avail_out = (sizeof comp->output);
525 output_len = png_ptr->zstream.avail_out;
536 png_ptr->zstream.avail_in = avail_in;
538 if (png_ptr->zstream.avail_out == 0)
558 (png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr)));
571 png_ptr->zstream.next_out = next->output;
572 png_ptr->zstream.avail_out = png_ptr->zbuffer_size;
573 output_len += png_ptr->zstream.avail_out;
580 ret = deflate(&png_ptr->zstream,
586 input_len += png_ptr->zstream.avail_in;
587 png_ptr->zstream.avail_in = 0; /* safety */
594 output_len -= png_ptr->zstream.avail_out;
595 png_ptr->zstream.avail_out = 0; /* safety */
604 png_ptr->zstream.msg = PNGZ_MSG_CAST("compressed data too long");
609 png_zstream_error(png_ptr, ret);
612 png_ptr->zowner = 0;
637 png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp)
642 png_compression_buffer *next = png_ptr->zbuffer_list;
649 png_write_chunk_data(png_ptr, output, avail);
656 avail = png_ptr->zbuffer_size;
663 png_error(png_ptr, "error writing ancillary chunked compressed data");
672 png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height,
694 png_ptr->channels = 1; break;
697 png_error(png_ptr,
708 png_error(png_ptr, "Invalid bit depth for RGB image");
710 png_ptr->channels = 3;
720 png_ptr->channels = 1;
724 png_error(png_ptr, "Invalid bit depth for paletted image");
734 png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
736 png_ptr->channels = 2;
745 png_error(png_ptr, "Invalid bit depth for RGBA image");
747 png_ptr->channels = 4;
751 png_error(png_ptr, "Invalid image color type specified");
756 png_warning(png_ptr, "Invalid compression type specified");
771 !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 &&
772 ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
779 png_warning(png_ptr, "Invalid filter type specified");
787 png_warning(png_ptr, "Invalid interlace type specified");
795 png_ptr->bit_depth = (png_byte)bit_depth;
796 png_ptr->color_type = (png_byte)color_type;
797 png_ptr->interlaced = (png_byte)interlace_type;
799 png_ptr->filter_type = (png_byte)filter_type;
801 png_ptr->compression_type = (png_byte)compression_type;
802 png_ptr->width = width;
803 png_ptr->height = height;
805 png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
806 png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
808 png_ptr->usr_width = png_ptr->width;
809 png_ptr->usr_bit_depth = png_ptr->bit_depth;
810 png_ptr->usr_channels = png_ptr->channels;
822 png_write_complete_chunk(png_ptr, png_IHDR, buf, 13);
824 if ((png_ptr->do_filter) == PNG_NO_FILTERS)
826 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
827 png_ptr->bit_depth < 8)
828 png_ptr->do_filter = PNG_FILTER_NONE;
831 png_ptr->do_filter = PNG_ALL_FILTERS;
834 png_ptr->mode = PNG_HAVE_IHDR; /* not READY_FOR_ZTXT */
842 png_write_PLTE(png_structrp png_ptr, png_const_colorp palette,
851 max_palette_length = (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
852 (1 << png_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
856 (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 &&
860 if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
862 png_error(png_ptr, "Invalid number of colors in palette");
867 png_warning(png_ptr, "Invalid number of colors in palette");
872 if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0)
874 png_warning(png_ptr,
880 png_ptr->num_palette = (png_uint_16)num_pal;
881 png_debug1(3, "num_palette = %d", png_ptr->num_palette);
883 png_write_chunk_header(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
891 png_write_chunk_data(png_ptr, buf, 3);
905 png_write_chunk_data(png_ptr, buf, 3);
909 png_write_chunk_end(png_ptr);
910 png_ptr->mode |= PNG_HAVE_PLTE;
926 * The routine manages the acquire and release of the png_ptr->zstream by
927 * checking and (at the end) clearing png_ptr->zowner; it does some sanity
931 png_compress_IDAT(png_structrp png_ptr, png_const_bytep input,
934 if (png_ptr->zowner != png_IDAT)
941 if (png_ptr->zbuffer_list == NULL)
943 png_ptr->zbuffer_list = png_voidcast(png_compression_bufferp,
944 png_malloc(png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr)));
945 png_ptr->zbuffer_list->next = NULL;
949 png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list->next);
952 if (png_deflate_claim(png_ptr, png_IDAT, png_image_size(png_ptr)) != Z_OK)
953 png_error(png_ptr, png_ptr->zstream.msg);
955 /* The output state is maintained in png_ptr->zstream, so it must be
958 png_ptr->zstream.next_out = png_ptr->zbuffer_list->output;
959 png_ptr->zstream.avail_out = png_ptr->zbuffer_size;
966 png_ptr->zstream.next_in = PNGZ_INPUT_CAST(input);
967 png_ptr->zstream.avail_in = 0; /* set below */
978 png_ptr->zstream.avail_in = avail;
981 ret = deflate(&png_ptr->zstream, input_len > 0 ? Z_NO_FLUSH : flush);
984 input_len += png_ptr->zstream.avail_in;
985 png_ptr->zstream.avail_in = 0;
991 if (png_ptr->zstream.avail_out == 0)
993 png_bytep data = png_ptr->zbuffer_list->output;
994 uInt size = png_ptr->zbuffer_size;
1000 if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 &&
1001 png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
1002 optimize_cmf(data, png_image_size(png_ptr));
1006 png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1007 png_ptr->mode |= PNG_HAVE_IDAT;
1009 png_ptr->zstream.next_out = data;
1010 png_ptr->zstream.avail_out = size;
1032 png_error(png_ptr, "Z_OK on Z_FINISH with output space");
1043 png_bytep data = png_ptr->zbuffer_list->output;
1044 uInt size = png_ptr->zbuffer_size - png_ptr->zstream.avail_out;
1047 if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 &&
1048 png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE)
1049 optimize_cmf(data, png_image_size(png_ptr));
1053 png_write_complete_chunk(png_ptr, png_IDAT, data, size);
1054 png_ptr->zstream.avail_out = 0;
1055 png_ptr->zstream.next_out = NULL;
1056 png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT;
1058 png_ptr->zowner = 0; /* Release the stream */
1065 png_zstream_error(png_ptr, ret);
1066 png_error(png_ptr, png_ptr->zstream.msg);
1073 png_write_IEND(png_structrp png_ptr)
1077 png_write_complete_chunk(png_ptr, png_IEND, NULL, 0);
1078 png_ptr->mode |= PNG_HAVE_IEND;
1084 png_write_gAMA_fixed(png_structrp png_ptr, png_fixed_point file_gamma)
1092 png_write_complete_chunk(png_ptr, png_gAMA, buf, 4);
1099 png_write_sRGB(png_structrp png_ptr, int srgb_intent)
1106 png_warning(png_ptr,
1110 png_write_complete_chunk(png_ptr, png_sRGB, buf, 1);
1117 png_write_iCCP(png_structrp png_ptr, png_const_charp name,
1132 png_error(png_ptr, "No profile for iCCP chunk"); /* internal error */
1137 png_error(png_ptr, "ICC profile too short");
1141 png_error(png_ptr, "ICC profile length invalid (not a multiple of 4)");
1147 png_error(png_ptr, "Profile length does not match profile");
1150 name_len = png_check_keyword(png_ptr, name, new_name);
1153 png_error(png_ptr, "iCCP: invalid keyword");
1163 if (png_text_compress(png_ptr, png_iCCP, &comp, name_len) != Z_OK)
1164 png_error(png_ptr, png_ptr->zstream.msg);
1166 png_write_chunk_header(png_ptr, png_iCCP, name_len + comp.output_len);
1168 png_write_chunk_data(png_ptr, new_name, name_len);
1170 png_write_compressed_data_out(png_ptr, &comp);
1172 png_write_chunk_end(png_ptr);
1179 png_write_sPLT(png_structrp png_ptr, png_const_sPLT_tp spalette)
1193 name_len = png_check_keyword(png_ptr, spalette->name, new_name);
1196 png_error(png_ptr, "sPLT: invalid keyword");
1199 png_write_chunk_header(png_ptr, png_sPLT,
1202 png_write_chunk_data(png_ptr, (png_bytep)new_name, (size_t)(name_len + 1));
1204 png_write_chunk_data(png_ptr, &spalette->depth, 1);
1228 png_write_chunk_data(png_ptr, entrybuf, entry_size);
1252 png_write_chunk_data(png_ptr, entrybuf, entry_size);
1256 png_write_chunk_end(png_ptr);
1263 png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type)
1276 png_ptr->usr_bit_depth);
1282 png_warning(png_ptr, "Invalid sBIT depth specified");
1294 if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
1296 png_warning(png_ptr, "Invalid sBIT depth specified");
1306 if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)
1308 png_warning(png_ptr, "Invalid sBIT depth specified");
1315 png_write_complete_chunk(png_ptr, png_sBIT, buf, size);
1322 png_write_cHRM_fixed(png_structrp png_ptr, const png_xy *xy)
1341 png_write_complete_chunk(png_ptr, png_cHRM, buf, 32);
1348 png_write_tRNS(png_structrp png_ptr, png_const_bytep trans_alpha,
1357 if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
1359 png_app_warning(png_ptr,
1365 png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha,
1372 if (tran->gray >= (1 << png_ptr->bit_depth))
1374 png_app_warning(png_ptr,
1381 png_write_complete_chunk(png_ptr, png_tRNS, buf, 2);
1391 if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0)
1396 png_app_warning(png_ptr,
1401 png_write_complete_chunk(png_ptr, png_tRNS, buf, 6);
1406 png_app_warning(png_ptr, "Can't write tRNS with an alpha channel");
1414 png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type)
1424 (png_ptr->num_palette != 0 ||
1425 (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0) &&
1427 back->index >= png_ptr->num_palette)
1429 png_warning(png_ptr, "Invalid background palette index");
1434 png_write_complete_chunk(png_ptr, png_bKGD, buf, 1);
1443 if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0)
1448 png_warning(png_ptr,
1455 png_write_complete_chunk(png_ptr, png_bKGD, buf, 6);
1460 if (back->gray >= (1 << png_ptr->bit_depth))
1462 png_warning(png_ptr,
1469 png_write_complete_chunk(png_ptr, png_bKGD, buf, 2);
1477 png_write_eXIf(png_structrp png_ptr, png_bytep exif, int num_exif)
1484 png_write_chunk_header(png_ptr, png_eXIf, (png_uint_32)(num_exif));
1489 png_write_chunk_data(png_ptr, buf, 1);
1492 png_write_chunk_end(png_ptr);
1499 png_write_hIST(png_structrp png_ptr, png_const_uint_16p hist, int num_hist)
1506 if (num_hist > (int)png_ptr->num_palette)
1509 png_ptr->num_palette);
1511 png_warning(png_ptr, "Invalid number of histogram entries specified");
1515 png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
1520 png_write_chunk_data(png_ptr, buf, 2);
1523 png_write_chunk_end(png_ptr);
1530 png_write_tEXt(png_structrp png_ptr, png_const_charp key, png_const_charp text,
1538 key_len = png_check_keyword(png_ptr, key, new_key);
1541 png_error(png_ptr, "tEXt: invalid keyword");
1550 png_error(png_ptr, "tEXt: text too long");
1553 png_write_chunk_header(png_ptr, png_tEXt,
1561 png_write_chunk_data(png_ptr, new_key, key_len + 1);
1564 png_write_chunk_data(png_ptr, (png_const_bytep)text, text_len);
1566 png_write_chunk_end(png_ptr);
1573 png_write_zTXt(png_structrp png_ptr, png_const_charp key, png_const_charp text,
1584 png_write_tEXt(png_ptr, key, text, 0);
1589 png_error(png_ptr, "zTXt: invalid compression type");
1591 key_len = png_check_keyword(png_ptr, key, new_key);
1594 png_error(png_ptr, "zTXt: invalid keyword");
1604 if (png_text_compress(png_ptr, png_zTXt, &comp, key_len) != Z_OK)
1605 png_error(png_ptr, png_ptr->zstream.msg);
1608 png_write_chunk_header(png_ptr, png_zTXt, key_len + comp.output_len);
1611 png_write_chunk_data(png_ptr, new_key, key_len);
1614 png_write_compressed_data_out(png_ptr, &comp);
1617 png_write_chunk_end(png_ptr);
1624 png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key,
1634 key_len = png_check_keyword(png_ptr, key, new_key);
1637 png_error(png_ptr, "iTXt: invalid keyword");
1653 png_error(png_ptr, "iTXt: invalid compression");
1690 if (png_text_compress(png_ptr, png_iTXt, &comp, prefix_len) != Z_OK)
1691 png_error(png_ptr, png_ptr->zstream.msg);
1697 png_error(png_ptr, "iTXt: uncompressed text too long");
1703 png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len);
1705 png_write_chunk_data(png_ptr, new_key, key_len);
1707 png_write_chunk_data(png_ptr, (png_const_bytep)lang, lang_len);
1709 png_write_chunk_data(png_ptr, (png_const_bytep)lang_key, lang_key_len);
1712 png_write_compressed_data_out(png_ptr, &comp);
1715 png_write_chunk_data(png_ptr, (png_const_bytep)text, comp.output_len);
1717 png_write_chunk_end(png_ptr);
1724 png_write_oFFs(png_structrp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
1732 png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
1738 png_write_complete_chunk(png_ptr, png_oFFs, buf, 9);
1744 png_write_pCAL(png_structrp png_ptr, png_charp purpose, png_int_32 X0,
1758 png_error(png_ptr, "Unrecognized equation type for pCAL chunk");
1760 purpose_len = png_check_keyword(png_ptr, purpose, new_purpose);
1763 png_error(png_ptr, "pCAL: invalid keyword");
1772 params_len = (png_size_tp)png_malloc(png_ptr,
1787 png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len);
1788 png_write_chunk_data(png_ptr, new_purpose, purpose_len);
1793 png_write_chunk_data(png_ptr, buf, 10);
1794 png_write_chunk_data(png_ptr, (png_const_bytep)units, (size_t)units_len);
1798 png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]);
1801 png_free(png_ptr, params_len);
1802 png_write_chunk_end(png_ptr);
1809 png_write_sCAL_s(png_structrp png_ptr, int unit, png_const_charp width,
1823 png_warning(png_ptr, "Can't write sCAL (buffer too small)");
1832 png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len);
1839 png_write_pHYs(png_structrp png_ptr, png_uint_32 x_pixels_per_unit,
1848 png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
1854 png_write_complete_chunk(png_ptr, png_pHYs, buf, 9);
1863 png_write_tIME(png_structrp png_ptr, png_const_timep mod_time)
1873 png_warning(png_ptr, "Invalid time specified for tIME chunk");
1884 png_write_complete_chunk(png_ptr, png_tIME, buf, 7);
1890 png_write_start_row(png_structrp png_ptr)
1917 usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth;
1918 buf_size = PNG_ROWBYTES(usr_pixel_depth, png_ptr->width) + 1;
1921 png_ptr->transformed_pixel_depth = png_ptr->pixel_depth;
1922 png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth;
1925 png_ptr->row_buf = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size));
1927 png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
1930 filters = png_ptr->do_filter;
1932 if (png_ptr->height == 1)
1935 if (png_ptr->width == 1)
1941 png_ptr->do_filter = filters;
1944 PNG_FILTER_PAETH)) != 0) && png_ptr->try_row == NULL)
1948 png_ptr->try_row = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size));
1963 png_ptr->tst_row = png_voidcast(png_bytep, png_malloc(png_ptr,
1971 png_ptr->prev_row = png_voidcast(png_bytep,
1972 png_calloc(png_ptr, buf_size));
1977 if (png_ptr->interlaced != 0)
1979 if ((png_ptr->transformations & PNG_INTERLACE) == 0)
1981 png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
1984 png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
1990 png_ptr->num_rows = png_ptr->height;
1991 png_ptr->usr_width = png_ptr->width;
1998 png_ptr->num_rows = png_ptr->height;
1999 png_ptr->usr_width = png_ptr->width;
2005 png_write_finish_row(png_structrp png_ptr)
2026 png_ptr->row_number++;
2029 if (png_ptr->row_number < png_ptr->num_rows)
2034 if (png_ptr->interlaced != 0)
2036 png_ptr->row_number = 0;
2037 if ((png_ptr->transformations & PNG_INTERLACE) != 0)
2039 png_ptr->pass++;
2047 png_ptr->pass++;
2049 if (png_ptr->pass >= 7)
2052 png_ptr->usr_width = (png_ptr->width +
2053 png_pass_inc[png_ptr->pass] - 1 -
2054 png_pass_start[png_ptr->pass]) /
2055 png_pass_inc[png_ptr->pass];
2057 png_ptr->num_rows = (png_ptr->height +
2058 png_pass_yinc[png_ptr->pass] - 1 -
2059 png_pass_ystart[png_ptr->pass]) /
2060 png_pass_yinc[png_ptr->pass];
2062 if ((png_ptr->transformations & PNG_INTERLACE) != 0)
2065 } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
2070 if (png_ptr->pass < 7)
2072 if (png_ptr->prev_row != NULL)
2073 memset(png_ptr->prev_row, 0,
2074 PNG_ROWBYTES(png_ptr->usr_channels *
2075 png_ptr->usr_bit_depth, png_ptr->width) + 1);
2084 png_compress_IDAT(png_ptr, NULL, 0, Z_FINISH);
2274 png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
2279 png_setup_sub_row(png_structrp png_ptr, png_uint_32 bpp,
2287 png_ptr->try_row[0] = PNG_FILTER_VALUE_SUB;
2289 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1; i < bpp;
2300 for (lp = png_ptr->row_buf + 1; i < row_bytes;
2318 png_setup_sub_row_only(png_structrp png_ptr, png_uint_32 bpp,
2324 png_ptr->try_row[0] = PNG_FILTER_VALUE_SUB;
2326 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1; i < bpp;
2332 for (lp = png_ptr->row_buf + 1; i < row_bytes;
2340 png_setup_up_row(png_structrp png_ptr, size_t row_bytes, size_t lmins)
2347 png_ptr->try_row[0] = PNG_FILTER_VALUE_UP;
2349 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2350 pp = png_ptr->prev_row + 1; i < row_bytes;
2367 png_setup_up_row_only(png_structrp png_ptr, size_t row_bytes)
2372 png_ptr->try_row[0] = PNG_FILTER_VALUE_UP;
2374 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2375 pp = png_ptr->prev_row + 1; i < row_bytes;
2383 png_setup_avg_row(png_structrp png_ptr, png_uint_32 bpp,
2391 png_ptr->try_row[0] = PNG_FILTER_VALUE_AVG;
2393 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2394 pp = png_ptr->prev_row + 1; i < bpp; i++)
2405 for (lp = png_ptr->row_buf + 1; i < row_bytes; i++)
2423 png_setup_avg_row_only(png_structrp png_ptr, png_uint_32 bpp,
2429 png_ptr->try_row[0] = PNG_FILTER_VALUE_AVG;
2431 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2432 pp = png_ptr->prev_row + 1; i < bpp; i++)
2437 for (lp = png_ptr->row_buf + 1; i < row_bytes; i++)
2445 png_setup_paeth_row(png_structrp png_ptr, png_uint_32 bpp,
2453 png_ptr->try_row[0] = PNG_FILTER_VALUE_PAETH;
2455 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2456 pp = png_ptr->prev_row + 1; i < bpp; i++)
2467 for (lp = png_ptr->row_buf + 1, cp = png_ptr->prev_row + 1; i < row_bytes;
2506 png_setup_paeth_row_only(png_structrp png_ptr, png_uint_32 bpp,
2512 png_ptr->try_row[0] = PNG_FILTER_VALUE_PAETH;
2514 for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1,
2515 pp = png_ptr->prev_row + 1; i < bpp; i++)
2520 for (lp = png_ptr->row_buf + 1, cp = png_ptr->prev_row + 1; i < row_bytes;
2550 png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
2553 png_write_filtered_row(png_ptr, png_ptr->row_buf, row_info->rowbytes+1);
2555 unsigned int filter_to_do = png_ptr->do_filter;
2567 row_buf = png_ptr->row_buf;
2599 best_row = png_ptr->row_buf;
2638 png_setup_sub_row_only(png_ptr, bpp, row_bytes);
2639 best_row = png_ptr->try_row;
2647 sum = png_setup_sub_row(png_ptr, bpp, row_bytes, lmins);
2652 best_row = png_ptr->try_row;
2653 if (png_ptr->tst_row != NULL)
2655 png_ptr->try_row = png_ptr->tst_row;
2656 png_ptr->tst_row = best_row;
2664 png_setup_up_row_only(png_ptr, row_bytes);
2665 best_row = png_ptr->try_row;
2673 sum = png_setup_up_row(png_ptr, row_bytes, lmins);
2678 best_row = png_ptr->try_row;
2679 if (png_ptr->tst_row != NULL)
2681 png_ptr->try_row = png_ptr->tst_row;
2682 png_ptr->tst_row = best_row;
2690 png_setup_avg_row_only(png_ptr, bpp, row_bytes);
2691 best_row = png_ptr->try_row;
2699 sum= png_setup_avg_row(png_ptr, bpp, row_bytes, lmins);
2704 best_row = png_ptr->try_row;
2705 if (png_ptr->tst_row != NULL)
2707 png_ptr->try_row = png_ptr->tst_row;
2708 png_ptr->tst_row = best_row;
2716 png_setup_paeth_row_only(png_ptr, bpp, row_bytes);
2717 best_row = png_ptr->try_row;
2725 sum = png_setup_paeth_row(png_ptr, bpp, row_bytes, lmins);
2729 best_row = png_ptr->try_row;
2730 if (png_ptr->tst_row != NULL)
2732 png_ptr->try_row = png_ptr->tst_row;
2733 png_ptr->tst_row = best_row;
2739 png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
2747 png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
2754 png_compress_IDAT(png_ptr, filtered_row, full_row_length, Z_NO_FLUSH);
2758 if (png_ptr->prev_row != NULL)
2762 tptr = png_ptr->prev_row;
2763 png_ptr->prev_row = png_ptr->row_buf;
2764 png_ptr->row_buf = tptr;
2769 png_write_finish_row(png_ptr);
2772 png_ptr->flush_rows++;
2774 if (png_ptr->flush_dist > 0 &&
2775 png_ptr->flush_rows >= png_ptr->flush_dist)
2777 png_write_flush(png_ptr);