X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/970f6abe1d04fa1811cd1cf85e590d8b933021c2..c13d6ac1ea199d1e3908d40d129e2fd5a4d82df7:/src/png/pngwtran.c?ds=sidebyside diff --git a/src/png/pngwtran.c b/src/png/pngwtran.c index 398fc41be6..070caa544d 100644 --- a/src/png/pngwtran.c +++ b/src/png/pngwtran.c @@ -1,16 +1,20 @@ /* pngwtran.c - transforms the data in a row for PNG writers * - * Last changed in libpng 1.2.9 April 14, 2006 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2006 Glenn Randers-Pehrson + * Last changed in libpng 1.4.1 [February 25, 2010] + * Copyright (c) 1998-2010 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.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h */ -#define PNG_INTERNAL +#define PNG_NO_PEDANTIC_WARNINGS #include "png.h" #ifdef PNG_WRITE_SUPPORTED +#include "pngpriv.h" /* Transform the data according to the user's wishes. The order of * transformations is significant. @@ -23,10 +27,11 @@ png_do_write_transformations(png_structp png_ptr) if (png_ptr == NULL) return; -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED if (png_ptr->transformations & PNG_USER_TRANSFORM) if (png_ptr->write_user_transform_fn != NULL) - (*(png_ptr->write_user_transform_fn)) /* user write transform function */ + (*(png_ptr->write_user_transform_fn)) /* User write transform + function */ (png_ptr, /* png_ptr */ &(png_ptr->row_info), /* row_info: */ /* png_uint_32 width; width of row */ @@ -37,48 +42,48 @@ png_do_write_transformations(png_structp png_ptr) /* png_byte pixel_depth; bits per pixel (depth*channels) */ png_ptr->row_buf + 1); /* start of pixel data for row */ #endif -#if defined(PNG_WRITE_FILLER_SUPPORTED) +#ifdef PNG_WRITE_FILLER_SUPPORTED if (png_ptr->transformations & PNG_FILLER) png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr->flags); #endif -#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) +#ifdef PNG_WRITE_PACKSWAP_SUPPORTED if (png_ptr->transformations & PNG_PACKSWAP) png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1); #endif -#if defined(PNG_WRITE_PACK_SUPPORTED) +#ifdef PNG_WRITE_PACK_SUPPORTED if (png_ptr->transformations & PNG_PACK) png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1, (png_uint_32)png_ptr->bit_depth); #endif -#if defined(PNG_WRITE_SWAP_SUPPORTED) +#ifdef PNG_WRITE_SWAP_SUPPORTED if (png_ptr->transformations & PNG_SWAP_BYTES) png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1); #endif -#if defined(PNG_WRITE_SHIFT_SUPPORTED) +#ifdef PNG_WRITE_SHIFT_SUPPORTED if (png_ptr->transformations & PNG_SHIFT) png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1, &(png_ptr->shift)); #endif -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED if (png_ptr->transformations & PNG_SWAP_ALPHA) png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); #endif -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED if (png_ptr->transformations & PNG_INVERT_ALPHA) png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); #endif -#if defined(PNG_WRITE_BGR_SUPPORTED) +#ifdef PNG_WRITE_BGR_SUPPORTED if (png_ptr->transformations & PNG_BGR) png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1); #endif -#if defined(PNG_WRITE_INVERT_SUPPORTED) +#ifdef PNG_WRITE_INVERT_SUPPORTED if (png_ptr->transformations & PNG_INVERT_MONO) png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1); #endif } -#if defined(PNG_WRITE_PACK_SUPPORTED) +#ifdef PNG_WRITE_PACK_SUPPORTED /* Pack pixels into bytes. Pass the true bit depth in bit_depth. The * row_info bit depth should be 8 (one pixel per byte). The channels * should be 1 (this only happens on grayscale and paletted images). @@ -87,10 +92,8 @@ void /* PRIVATE */ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) { png_debug(1, "in png_do_pack"); + if (row_info->bit_depth == 8 && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif row_info->channels == 1) { switch ((int)bit_depth) @@ -201,7 +204,7 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) } #endif -#if defined(PNG_WRITE_SHIFT_SUPPORTED) +#ifdef PNG_WRITE_SHIFT_SUPPORTED /* Shift pixel values to take advantage of whole range. Pass the * true number of bits in bit_depth. The row should be packed * according to row_info->bit_depth. Thus, if you had a row of @@ -213,11 +216,8 @@ void /* PRIVATE */ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) { png_debug(1, "in png_do_shift"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && -#else + if ( -#endif row_info->color_type != PNG_COLOR_TYPE_PALETTE) { int shift_start[4], shift_dec[4]; @@ -248,7 +248,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) channels++; } - /* with low row depths, could only be grayscale, so one channel */ + /* With low row depths, could only be grayscale, so one channel */ if (row_info->bit_depth < 8) { png_bytep bp = row; @@ -332,14 +332,12 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth) } #endif -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED void /* PRIVATE */ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_swap_alpha"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif + { if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { @@ -420,14 +418,12 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) } #endif -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED void /* PRIVATE */ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_invert_alpha"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif + { if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { @@ -439,7 +435,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) png_uint_32 row_width = row_info->width; for (i = 0, sp = dp = row; i < row_width; i++) { - /* does nothing + /* Does nothing *(dp++) = *(sp++); *(dp++) = *(sp++); *(dp++) = *(sp++); @@ -457,7 +453,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) for (i = 0, sp = dp = row; i < row_width; i++) { - /* does nothing + /* Does nothing *(dp++) = *(sp++); *(dp++) = *(sp++); *(dp++) = *(sp++); @@ -495,7 +491,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) for (i = 0, sp = dp = row; i < row_width; i++) { - /* does nothing + /* Does nothing *(dp++) = *(sp++); *(dp++) = *(sp++); */ @@ -509,16 +505,14 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) } #endif -#if defined(PNG_MNG_FEATURES_SUPPORTED) -/* undoes intrapixel differencing */ +#ifdef PNG_MNG_FEATURES_SUPPORTED +/* Undoes intrapixel differencing */ void /* PRIVATE */ png_do_write_intrapixel(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_intrapixel"); + if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif (row_info->color_type & PNG_COLOR_MASK_COLOR)) { int bytes_per_pixel;