diff options
Diffstat (limited to 'pngwutil.c')
| -rw-r--r-- | pngwutil.c | 132 |
1 files changed, 67 insertions, 65 deletions
diff --git a/pngwutil.c b/pngwutil.c index f52495c07..80a45f775 100644 --- a/pngwutil.c +++ b/pngwutil.c @@ -1,7 +1,7 @@ /* pngwutil.c - utilities to write a PNG file * - * Last changed in libpng 1.2.40 [September 10, 2009] + * Last changed in libpng 1.2.41 [November 18, 2009] * Copyright (c) 1998-2009 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -58,7 +58,7 @@ png_save_uint_16(png_bytep buf, unsigned int i) * we should call png_set_sig_bytes() to tell libpng how many of the * bytes have already been written. */ -void /* PRIVATE */ +void PNGAPI png_write_sig(png_structp png_ptr) { png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; @@ -106,6 +106,7 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name, if (png_ptr == NULL) return; + /* Write the length and the chunk name */ png_save_uint_32(buf, length); png_memcpy(buf + 4, chunk_name, 4); @@ -192,7 +193,7 @@ png_text_compress(png_structp png_ptr, if (compression >= PNG_TEXT_COMPRESSION_LAST) { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) +#if defined(PNG_STDIO_SUPPORTED) && !defined(_WIN32_WCE) char msg[50]; png_snprintf(msg, 50, "Unknown compression type %d", compression); png_warning(png_ptr, msg); @@ -459,7 +460,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, * 5. The color_type is RGB or RGBA */ if ( -#if defined(PNG_MNG_FEATURES_SUPPORTED) +#ifdef PNG_MNG_FEATURES_SUPPORTED !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && (color_type == PNG_COLOR_TYPE_RGB || @@ -487,7 +488,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, png_ptr->bit_depth = (png_byte)bit_depth; png_ptr->color_type = (png_byte)color_type; png_ptr->interlaced = (png_byte)interlace_type; -#if defined(PNG_MNG_FEATURES_SUPPORTED) +#ifdef PNG_MNG_FEATURES_SUPPORTED png_ptr->filter_type = (png_byte)filter_type; #endif png_ptr->compression_type = (png_byte)compression_type; @@ -579,7 +580,7 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) png_debug(1, "in png_write_PLTE"); if (( -#if defined(PNG_MNG_FEATURES_SUPPORTED) +#ifdef PNG_MNG_FEATURES_SUPPORTED !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && #endif num_pal == 0) || num_pal > 256) @@ -607,7 +608,7 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal) png_write_chunk_start(png_ptr, (png_bytep)png_PLTE, (png_uint_32)(num_pal * 3)); -#ifndef PNG_NO_POINTER_INDEXING +#ifdef PNG_POINTER_INDEXING_SUPPORTED for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++) { buf[0] = pal_ptr->red; @@ -700,7 +701,7 @@ png_write_IEND(png_structp png_ptr) png_ptr->mode |= PNG_HAVE_IEND; } -#if defined(PNG_WRITE_gAMA_SUPPORTED) +#ifdef PNG_WRITE_gAMA_SUPPORTED /* Write a gAMA chunk */ #ifdef PNG_FLOATING_POINT_SUPPORTED void /* PRIVATE */ @@ -738,7 +739,7 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) #endif #endif -#if defined(PNG_WRITE_sRGB_SUPPORTED) +#ifdef PNG_WRITE_sRGB_SUPPORTED /* Write a sRGB chunk */ void /* PRIVATE */ png_write_sRGB(png_structp png_ptr, int srgb_intent) @@ -758,7 +759,7 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent) } #endif -#if defined(PNG_WRITE_iCCP_SUPPORTED) +#ifdef PNG_WRITE_iCCP_SUPPORTED /* Write an iCCP chunk */ void /* PRIVATE */ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, @@ -839,7 +840,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type, } #endif -#if defined(PNG_WRITE_sPLT_SUPPORTED) +#ifdef PNG_WRITE_sPLT_SUPPORTED /* Write a sPLT chunk */ void /* PRIVATE */ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) @@ -853,7 +854,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) int entry_size = (spalette->depth == 8 ? 6 : 10); int palette_size = entry_size * spalette->nentries; png_sPLT_entryp ep; -#ifdef PNG_NO_POINTER_INDEXING +#ifndef PNG_POINTER_INDEXING_SUPPORTED int i; #endif @@ -870,7 +871,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, (png_size_t)1); /* Loop through each palette entry, writing appropriately */ -#ifndef PNG_NO_POINTER_INDEXING +#ifdef PNG_POINTER_INDEXING_SUPPORTED for (ep = spalette->entries; ep<spalette->entries + spalette->nentries; ep++) { if (spalette->depth == 8) @@ -920,7 +921,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette) } #endif -#if defined(PNG_WRITE_sBIT_SUPPORTED) +#ifdef PNG_WRITE_sBIT_SUPPORTED /* Write the sBIT chunk */ void /* PRIVATE */ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) @@ -977,7 +978,7 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type) } #endif -#if defined(PNG_WRITE_cHRM_SUPPORTED) +#ifdef PNG_WRITE_cHRM_SUPPORTED /* Write the cHRM chunk */ #ifdef PNG_FLOATING_POINT_SUPPORTED void /* PRIVATE */ @@ -1004,7 +1005,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y, int_blue_x = (png_uint_32)(blue_x * 100000.0 + 0.5); int_blue_y = (png_uint_32)(blue_y * 100000.0 + 0.5); -#if !defined(PNG_NO_CHECK_cHRM) +#ifdef PNG_CHECK_cHRM_SUPPORTED if (png_check_cHRM_fixed(png_ptr, int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y, int_blue_x, int_blue_y)) #endif @@ -1042,7 +1043,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, png_debug(1, "in png_write_cHRM"); /* Each value is saved in 1/100,000ths */ -#if !defined(PNG_NO_CHECK_cHRM) +#ifdef PNG_CHECK_cHRM_SUPPORTED if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) #endif @@ -1065,7 +1066,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, #endif #endif -#if defined(PNG_WRITE_tRNS_SUPPORTED) +#ifdef PNG_WRITE_tRNS_SUPPORTED /* Write the tRNS chunk */ void /* PRIVATE */ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran, @@ -1122,7 +1123,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran, } #endif -#if defined(PNG_WRITE_bKGD_SUPPORTED) +#ifdef PNG_WRITE_bKGD_SUPPORTED /* Write the background chunk */ void /* PRIVATE */ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) @@ -1137,7 +1138,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) if (color_type == PNG_COLOR_TYPE_PALETTE) { if ( -#if defined(PNG_MNG_FEATURES_SUPPORTED) +#ifdef PNG_MNG_FEATURES_SUPPORTED (png_ptr->num_palette || (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) && #endif @@ -1176,7 +1177,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type) } #endif -#if defined(PNG_WRITE_hIST_SUPPORTED) +#ifdef PNG_WRITE_hIST_SUPPORTED /* Write the histogram */ void /* PRIVATE */ png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist) @@ -1253,7 +1254,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) if ((png_byte)*kp < 0x20 || ((png_byte)*kp > 0x7E && (png_byte)*kp < 0xA1)) { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) +#if defined(PNG_STDIO_SUPPORTED) && !defined(_WIN32_WCE) char msg[40]; png_snprintf(msg, 40, @@ -1340,7 +1341,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key) } #endif -#if defined(PNG_WRITE_tEXt_SUPPORTED) +#ifdef PNG_WRITE_tEXt_SUPPORTED /* Write a tEXt chunk */ void /* PRIVATE */ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, @@ -1381,7 +1382,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text, } #endif -#if defined(PNG_WRITE_zTXt_SUPPORTED) +#ifdef PNG_WRITE_zTXt_SUPPORTED /* Write a compressed text chunk */ void /* PRIVATE */ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, @@ -1441,7 +1442,7 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text, } #endif -#if defined(PNG_WRITE_iTXt_SUPPORTED) +#ifdef PNG_WRITE_iTXt_SUPPORTED /* Write an iTXt chunk */ void /* PRIVATE */ png_write_iTXt(png_structp png_ptr, int compression, png_charp key, @@ -1530,7 +1531,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key, } #endif -#if defined(PNG_WRITE_oFFs_SUPPORTED) +#ifdef PNG_WRITE_oFFs_SUPPORTED /* Write the oFFs chunk */ void /* PRIVATE */ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, @@ -1553,7 +1554,7 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9); } #endif -#if defined(PNG_WRITE_pCAL_SUPPORTED) +#ifdef PNG_WRITE_pCAL_SUPPORTED /* Write the pCAL chunk (described in the PNG extensions document) */ void /* PRIVATE */ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, @@ -1616,9 +1617,9 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, } #endif -#if defined(PNG_WRITE_sCAL_SUPPORTED) +#ifdef PNG_WRITE_sCAL_SUPPORTED /* Write the sCAL chunk */ -#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) +#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) void /* PRIVATE */ png_write_sCAL(png_structp png_ptr, int unit, double width, double height) { @@ -1631,7 +1632,7 @@ png_write_sCAL(png_structp png_ptr, int unit, double width, double height) png_debug(1, "in png_write_sCAL"); buf[0] = (char)unit; -#if defined(_WIN32_WCE) +#ifdef _WIN32_WCE /* sprintf() function is not supported on WindowsCE */ { wchar_t wc_buf[32]; @@ -1690,7 +1691,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width, #endif #endif -#if defined(PNG_WRITE_pHYs_SUPPORTED) +#ifdef PNG_WRITE_pHYs_SUPPORTED /* Write the pHYs chunk */ void /* PRIVATE */ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, @@ -1715,7 +1716,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, } #endif -#if defined(PNG_WRITE_tIME_SUPPORTED) +#ifdef PNG_WRITE_tIME_SUPPORTED /* Write the tIME chunk. Use either png_convert_from_struct_tm() * or png_convert_from_time_t(), or fill in the structure yourself. */ @@ -1753,7 +1754,6 @@ void /* PRIVATE */ png_write_start_row(png_structp png_ptr) { #ifdef PNG_WRITE_INTERLACING_SUPPORTED -#ifdef PNG_USE_LOCAL_ARRAYS /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ @@ -1768,7 +1768,6 @@ png_write_start_row(png_structp png_ptr) /* Offset to next interlace block in the y direction */ int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif -#endif png_size_t buf_size; @@ -1782,7 +1781,7 @@ png_write_start_row(png_structp png_ptr) (png_uint_32)buf_size); png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE; -#ifndef PNG_NO_WRITE_FILTER +#ifdef PNG_WRITE_FILTER_SUPPORTED /* Set up filtering buffer, if using this filter */ if (png_ptr->do_filter & PNG_FILTER_SUB) { @@ -1794,33 +1793,32 @@ png_write_start_row(png_structp png_ptr) /* We only need to keep the previous row if we are using one of these. */ if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) { - /* Set up previous row buffer */ - png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, - (png_uint_32)buf_size); - png_memset(png_ptr->prev_row, 0, buf_size); + /* Set up previous row buffer */ + png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, + (png_uint_32)buf_size); if (png_ptr->do_filter & PNG_FILTER_UP) { png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(png_ptr->rowbytes + 1)); + (png_uint_32)(png_ptr->rowbytes + 1)); png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; } if (png_ptr->do_filter & PNG_FILTER_AVG) { png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(png_ptr->rowbytes + 1)); + (png_uint_32)(png_ptr->rowbytes + 1)); png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; } if (png_ptr->do_filter & PNG_FILTER_PAETH) { png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(png_ptr->rowbytes + 1)); + (png_uint_32)(png_ptr->rowbytes + 1)); png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; } } -#endif /* PNG_NO_WRITE_FILTER */ +#endif /* PNG_WRITE_FILTER_SUPPORTED */ #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* If interlaced, we need to set up width and height of pass */ @@ -1854,7 +1852,6 @@ void /* PRIVATE */ png_write_finish_row(png_structp png_ptr) { #ifdef PNG_WRITE_INTERLACING_SUPPORTED -#ifdef PNG_USE_LOCAL_ARRAYS /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ @@ -1869,7 +1866,6 @@ png_write_finish_row(png_structp png_ptr) /* Offset to next interlace block in the y direction */ int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif -#endif int ret; @@ -1962,7 +1958,7 @@ png_write_finish_row(png_structp png_ptr) png_ptr->zstream.data_type = Z_BINARY; } -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) +#ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Pick out the correct pixels for the interlace pass. * The basic idea here is to go through the row with a source * pointer and a destination pointer (sp and dp), and copy the @@ -1973,7 +1969,6 @@ png_write_finish_row(png_structp png_ptr) void /* PRIVATE */ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) { -#ifdef PNG_USE_LOCAL_ARRAYS /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ @@ -1981,12 +1976,11 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) /* Offset to next interlace block */ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; -#endif png_debug(1, "in png_do_write_interlace"); /* We don't have to do anything on the last pass (6) */ -#if defined(PNG_USELESS_TESTS_SUPPORTED) +#ifdef PNG_USELESS_TESTS_SUPPORTED if (row != NULL && row_info != NULL && pass < 6) #else if (pass < 6) @@ -2146,7 +2140,7 @@ void /* PRIVATE */ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) { png_bytep best_row; -#ifndef PNG_NO_WRITE_FILTER +#ifdef PNG_WRITE_FILTER_SUPPORTED png_bytep prev_row, row_buf; png_uint_32 mins, bpp; png_byte filter_to_do = png_ptr->do_filter; @@ -2157,13 +2151,21 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_debug(1, "in png_write_find_filter"); +#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED + if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS) + { + /* These will never be selected so we need not test them. */ + filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH); + } +#endif + /* Find out how many bytes offset each pixel is */ bpp = (row_info->pixel_depth + 7) >> 3; prev_row = png_ptr->prev_row; #endif best_row = png_ptr->row_buf; -#ifndef PNG_NO_WRITE_FILTER +#ifdef PNG_WRITE_FILTER_SUPPORTED row_buf = best_row; mins = PNG_MAXSUM; @@ -2206,7 +2208,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) sum += (v < 128) ? v : 256 - v; } -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { png_uint_32 sumhi, sumlo; @@ -2270,7 +2272,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_uint_32 i; int v; -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* We temporarily increase the "minimum sum" by the factor we * would reduce the sum of this filter, so that we can do the * early exit comparison without scaling the sum each time. @@ -2323,7 +2325,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) break; } -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2384,7 +2386,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) int v; -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2426,7 +2428,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) break; } -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2489,7 +2491,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_uint_32 i; int v; -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2538,7 +2540,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) break; } -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2622,7 +2624,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_uint_32 i; int v; -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2703,7 +2705,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) break; } -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) { int j; @@ -2739,13 +2741,13 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) best_row = png_ptr->paeth_row; } } -#endif /* PNG_NO_WRITE_FILTER */ +#endif /* PNG_WRITE_FILTER_SUPPORTED */ /* Do the actual writing of the filtered row data from the chosen filter. */ png_write_filtered_row(png_ptr, best_row); -#ifndef PNG_NO_WRITE_FILTER -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) +#ifdef PNG_WRITE_FILTER_SUPPORTED +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* Save the type of filter we picked this time for future calculations */ if (png_ptr->num_prev_filters > 0) { @@ -2757,7 +2759,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) png_ptr->prev_filters[j] = best_row[0]; } #endif -#endif /* PNG_NO_WRITE_FILTER */ +#endif /* PNG_WRITE_FILTER_SUPPORTED */ } @@ -2812,7 +2814,7 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row) /* Finish row - updates counters and flushes zlib if last row */ png_write_finish_row(png_ptr); -#if defined(PNG_WRITE_FLUSH_SUPPORTED) +#ifdef PNG_WRITE_FLUSH_SUPPORTED png_ptr->flush_rows++; if (png_ptr->flush_dist > 0 && |