X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0272a10d2e6d5323422c4c8600fe47ccac0df182..7be2a7af39888b264eb0c5787fb2914005633d1b:/src/png/pngset.c?ds=inline diff --git a/src/png/pngset.c b/src/png/pngset.c index 2871140d63..92db3890a8 100644 --- a/src/png/pngset.c +++ b/src/png/pngset.c @@ -1,28 +1,32 @@ /* pngset.c - storage of image information into info struct * - * Last changed in libpng 1.2.17 May 15, 2007 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2007 Glenn Randers-Pehrson + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 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 + * * The functions here are used during reads to store data from the file * into the info struct, and during writes to store application data * into the info struct for writing into the file. This abstracts the * info struct and allows us to change the structure in the future. */ -#define PNG_INTERNAL -#include "png.h" +#include "pngpriv.h" #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -#if defined(PNG_bKGD_SUPPORTED) +#ifdef PNG_bKGD_SUPPORTED void PNGAPI -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) +png_set_bKGD(png_structp png_ptr, png_infop info_ptr, + png_const_color_16p background) { - png_debug1(1, "in %s storage function\n", "bKGD"); + png_debug1(1, "in %s storage function", "bKGD"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -31,345 +35,242 @@ png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) } #endif -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, - double white_x, double white_y, double red_x, double red_y, - double green_x, double green_y, double blue_x, double blue_y) +#ifdef PNG_cHRM_SUPPORTED +void PNGFAPI +png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, + png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, + png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, + png_fixed_point blue_x, png_fixed_point blue_y) { - png_debug1(1, "in %s storage function\n", "cHRM"); + png_debug1(1, "in %s storage function", "cHRM fixed"); + if (png_ptr == NULL || info_ptr == NULL) return; - if (white_x < 0.0 || white_y < 0.0 || - red_x < 0.0 || red_y < 0.0 || - green_x < 0.0 || green_y < 0.0 || - blue_x < 0.0 || blue_y < 0.0) +# 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 { - png_warning(png_ptr, - "Ignoring attempt to set negative chromaticity value"); - return; - } - if (white_x > 21474.83 || white_y > 21474.83 || - red_x > 21474.83 || red_y > 21474.83 || - green_x > 21474.83 || green_y > 21474.83 || - blue_x > 21474.83 || blue_y > 21474.83) - { - png_warning(png_ptr, - "Ignoring attempt to set chromaticity value exceeding 21474.83"); - return; + info_ptr->x_white = white_x; + info_ptr->y_white = white_y; + info_ptr->x_red = red_x; + info_ptr->y_red = red_y; + info_ptr->x_green = green_x; + info_ptr->y_green = green_y; + info_ptr->x_blue = blue_x; + info_ptr->y_blue = blue_y; + info_ptr->valid |= PNG_INFO_cHRM; } - - info_ptr->x_white = (float)white_x; - info_ptr->y_white = (float)white_y; - info_ptr->x_red = (float)red_x; - info_ptr->y_red = (float)red_y; - info_ptr->x_green = (float)green_x; - info_ptr->y_green = (float)green_y; - info_ptr->x_blue = (float)blue_x; - info_ptr->y_blue = (float)blue_y; -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); - info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); - info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5); - info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5); - info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); - info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); - info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5); - info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5); -#endif - info_ptr->valid |= PNG_INFO_cHRM; } -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, - png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, - png_fixed_point blue_x, png_fixed_point blue_y) + +void PNGFAPI +png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, + png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_red_Z, png_fixed_point int_green_X, + png_fixed_point int_green_Y, png_fixed_point int_green_Z, + png_fixed_point int_blue_X, png_fixed_point int_blue_Y, + png_fixed_point int_blue_Z) { - png_debug1(1, "in %s storage function\n", "cHRM"); + png_XYZ XYZ; + png_xy xy; + + png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); + if (png_ptr == NULL || info_ptr == NULL) return; - if (white_x < 0 || white_y < 0 || - red_x < 0 || red_y < 0 || - green_x < 0 || green_y < 0 || - blue_x < 0 || blue_y < 0) - { - png_warning(png_ptr, - "Ignoring attempt to set negative chromaticity value"); - return; - } -#ifdef PNG_FLOATING_POINT_SUPPORTED - if (white_x > (double) PNG_UINT_31_MAX || - white_y > (double) PNG_UINT_31_MAX || - red_x > (double) PNG_UINT_31_MAX || - red_y > (double) PNG_UINT_31_MAX || - green_x > (double) PNG_UINT_31_MAX || - green_y > (double) PNG_UINT_31_MAX || - blue_x > (double) PNG_UINT_31_MAX || - blue_y > (double) PNG_UINT_31_MAX) -#else - if (white_x > (png_fixed_point) PNG_UINT_31_MAX/100000L || - white_y > (png_fixed_point) PNG_UINT_31_MAX/100000L || - red_x > (png_fixed_point) PNG_UINT_31_MAX/100000L || - red_y > (png_fixed_point) PNG_UINT_31_MAX/100000L || - green_x > (png_fixed_point) PNG_UINT_31_MAX/100000L || - green_y > (png_fixed_point) PNG_UINT_31_MAX/100000L || - blue_x > (png_fixed_point) PNG_UINT_31_MAX/100000L || - blue_y > (png_fixed_point) PNG_UINT_31_MAX/100000L) -#endif - { - png_warning(png_ptr, - "Ignoring attempt to set chromaticity value exceeding 21474.83"); - return; - } - info_ptr->int_x_white = white_x; - info_ptr->int_y_white = white_y; - info_ptr->int_x_red = red_x; - info_ptr->int_y_red = red_y; - info_ptr->int_x_green = green_x; - info_ptr->int_y_green = green_y; - info_ptr->int_x_blue = blue_x; - info_ptr->int_y_blue = blue_y; -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->x_white = (float)(white_x/100000.); - info_ptr->y_white = (float)(white_y/100000.); - info_ptr->x_red = (float)( red_x/100000.); - info_ptr->y_red = (float)( red_y/100000.); - info_ptr->x_green = (float)(green_x/100000.); - info_ptr->y_green = (float)(green_y/100000.); - info_ptr->x_blue = (float)( blue_x/100000.); - info_ptr->y_blue = (float)( blue_y/100000.); -#endif - info_ptr->valid |= PNG_INFO_cHRM; + XYZ.redX = int_red_X; + XYZ.redY = int_red_Y; + XYZ.redZ = int_red_Z; + XYZ.greenX = int_green_X; + XYZ.greenY = int_green_Y; + XYZ.greenZ = int_green_Z; + XYZ.blueX = int_blue_X; + XYZ.blueY = int_blue_Y; + XYZ.blueZ = int_blue_Z; + + if (png_xy_from_XYZ(&xy, XYZ)) + png_error(png_ptr, "XYZ values out of representable range"); + + png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy, + xy.greenx, xy.greeny, xy.bluex, xy.bluey); } -#endif -#endif -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +png_set_cHRM(png_structp png_ptr, png_infop info_ptr, + double white_x, double white_y, double red_x, double red_y, + double green_x, double green_y, double blue_x, double blue_y) { - double gamma; - png_debug1(1, "in %s storage function\n", "gAMA"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* Check for overflow */ - if (file_gamma > 21474.83) - { - png_warning(png_ptr, "Limiting gamma to 21474.83"); - gamma=21474.83; - } - else - gamma=file_gamma; - info_ptr->gamma = (float)gamma; -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = (int)(gamma*100000.+.5); -#endif - info_ptr->valid |= PNG_INFO_gAMA; - if(gamma == 0.0) - png_warning(png_ptr, "Setting gamma=0"); + png_set_cHRM_fixed(png_ptr, info_ptr, + png_fixed(png_ptr, white_x, "cHRM White X"), + png_fixed(png_ptr, white_y, "cHRM White Y"), + png_fixed(png_ptr, red_x, "cHRM Red X"), + png_fixed(png_ptr, red_y, "cHRM Red Y"), + png_fixed(png_ptr, green_x, "cHRM Green X"), + png_fixed(png_ptr, green_y, "cHRM Green Y"), + png_fixed(png_ptr, blue_x, "cHRM Blue X"), + png_fixed(png_ptr, blue_y, "cHRM Blue Y")); } -#endif + void PNGAPI +png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, + double red_Y, double red_Z, double green_X, double green_Y, double green_Z, + double blue_X, double blue_Y, double blue_Z) +{ + png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, + png_fixed(png_ptr, red_X, "cHRM Red X"), + png_fixed(png_ptr, red_Y, "cHRM Red Y"), + png_fixed(png_ptr, red_Z, "cHRM Red Z"), + png_fixed(png_ptr, green_X, "cHRM Red X"), + png_fixed(png_ptr, green_Y, "cHRM Red Y"), + png_fixed(png_ptr, green_Z, "cHRM Red Z"), + png_fixed(png_ptr, blue_X, "cHRM Red X"), + png_fixed(png_ptr, blue_Y, "cHRM Red Y"), + png_fixed(png_ptr, blue_Z, "cHRM Red Z")); +} +# endif /* PNG_FLOATING_POINT_SUPPORTED */ + +#endif /* PNG_cHRM_SUPPORTED */ + +#ifdef PNG_gAMA_SUPPORTED +void PNGFAPI png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point - int_gamma) + file_gamma) { - png_fixed_point gamma; + png_debug1(1, "in %s storage function", "gAMA"); - png_debug1(1, "in %s storage function\n", "gAMA"); if (png_ptr == NULL || info_ptr == NULL) return; - if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX) - { - png_warning(png_ptr, "Limiting gamma to 21474.83"); - gamma=PNG_UINT_31_MAX; - } + /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't + * occur. Since the fixed point representation is assymetrical it is + * possible for 1/gamma to overflow the limit of 21474 and this means the + * gamma value must be at least 5/100000 and hence at most 20000.0. For + * safety the limits here are a little narrower. The values are 0.00016 to + * 6250.0, which are truly ridiculous gammma values (and will produce + * displays that are all black or all white.) + */ + if (file_gamma < 16 || file_gamma > 625000000) + png_warning(png_ptr, "Out of range gamma value ignored"); + else { - if (int_gamma < 0) - { - png_warning(png_ptr, "Setting negative gamma to zero"); - gamma=0; - } - else - gamma=int_gamma; + info_ptr->gamma = file_gamma; + info_ptr->valid |= PNG_INFO_gAMA; } -#ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->gamma = (float)(gamma/100000.); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = gamma; -#endif - info_ptr->valid |= PNG_INFO_gAMA; - if(gamma == 0) - png_warning(png_ptr, "Setting gamma=0"); } + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +{ + png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, + "png_set_gAMA")); +} +# endif #endif -#if defined(PNG_hIST_SUPPORTED) +#ifdef PNG_hIST_SUPPORTED void PNGAPI -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) +png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) { int i; - png_debug1(1, "in %s storage function\n", "hIST"); + png_debug1(1, "in %s storage function", "hIST"); + if (png_ptr == NULL || info_ptr == NULL) return; - if (info_ptr->num_palette <= 0 || info_ptr->num_palette + + if (info_ptr->num_palette == 0 || info_ptr->num_palette > PNG_MAX_PALETTE_LENGTH) { - png_warning(png_ptr, - "Invalid palette size, hIST allocation skipped."); - return; + png_warning(png_ptr, + "Invalid palette size, hIST allocation skipped"); + + return; } -#ifdef PNG_FREE_ME_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); -#endif - /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version - 1.2.1 */ + + /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in + * version 1.2.1 + */ png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, - (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof (png_uint_16))); + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); + if (png_ptr->hist == NULL) - { - png_warning(png_ptr, "Insufficient memory for hIST chunk data."); - return; - } + { + png_warning(png_ptr, "Insufficient memory for hIST chunk data"); + return; + } for (i = 0; i < info_ptr->num_palette; i++) - png_ptr->hist[i] = hist[i]; + png_ptr->hist[i] = hist[i]; + info_ptr->hist = png_ptr->hist; info_ptr->valid |= PNG_INFO_hIST; - -#ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_HIST; -#else - png_ptr->flags |= PNG_FLAG_FREE_HIST; -#endif } #endif void PNGAPI png_set_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type) + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type) { - png_debug1(1, "in %s storage function\n", "IHDR"); + png_debug1(1, "in %s storage function", "IHDR"); + if (png_ptr == NULL || info_ptr == NULL) return; - /* check for width and height valid values */ - if (width == 0 || height == 0) - png_error(png_ptr, "Image width or height is zero in IHDR"); -#ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (width > png_ptr->user_width_max || height > png_ptr->user_height_max) - png_error(png_ptr, "image size exceeds user limits in IHDR"); -#else - if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX) - png_error(png_ptr, "image size exceeds user limits in IHDR"); -#endif - if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX) - png_error(png_ptr, "Invalid image size in IHDR"); - if ( width > (PNG_UINT_32_MAX - >> 3) /* 8-byte RGBA pixels */ - - 64 /* bigrowbuf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding of width to multiple of 8 pixels */ - - 8) /* extra max_pixel_depth pad */ - png_warning(png_ptr, "Width is too large for libpng to process pixels"); - - /* check other values */ - if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && - bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth in IHDR"); - - if (color_type < 0 || color_type == 1 || - color_type == 5 || color_type > 6) - png_error(png_ptr, "Invalid color type in IHDR"); - - if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || - ((color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) - png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); - - if (interlace_type >= PNG_INTERLACE_LAST) - png_error(png_ptr, "Unknown interlace method in IHDR"); - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_error(png_ptr, "Unknown compression method in IHDR"); - -#if defined(PNG_MNG_FEATURES_SUPPORTED) - /* Accept filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not read a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted) - png_warning(png_ptr,"MNG features are not allowed in a PNG datastream"); - if(filter_type != PNG_FILTER_TYPE_BASE) - { - if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && - ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA))) - png_error(png_ptr, "Unknown filter method in IHDR"); - if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) - png_warning(png_ptr, "Invalid filter method in IHDR"); - } -#else - if(filter_type != PNG_FILTER_TYPE_BASE) - png_error(png_ptr, "Unknown filter method in IHDR"); -#endif - info_ptr->width = width; info_ptr->height = height; info_ptr->bit_depth = (png_byte)bit_depth; - info_ptr->color_type =(png_byte) color_type; + info_ptr->color_type = (png_byte)color_type; info_ptr->compression_type = (png_byte)compression_type; info_ptr->filter_type = (png_byte)filter_type; info_ptr->interlace_type = (png_byte)interlace_type; + + png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, + info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, + info_ptr->compression_type, info_ptr->filter_type); + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->channels = 1; + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) info_ptr->channels = 3; + else info_ptr->channels = 1; + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) info_ptr->channels++; + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); - /* check for potential overflow */ - if (width > (PNG_UINT_32_MAX - >> 3) /* 8-byte RGBA pixels */ - - 64 /* bigrowbuf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding of width to multiple of 8 pixels */ - - 8) /* extra max_pixel_depth pad */ - info_ptr->rowbytes = (png_size_t)0; + /* Check for potential overflow */ + if (width > + (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */ + - 48 /* bigrowbuf hack */ + - 1 /* filter byte */ + - 7*8 /* rounding of width to multiple of 8 pixels */ + - 8) /* extra max_pixel_depth pad */ + info_ptr->rowbytes = 0; else - info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width); + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); } -#if defined(PNG_oFFs_SUPPORTED) +#ifdef PNG_oFFs_SUPPORTED void PNGAPI png_set_oFFs(png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type) + png_int_32 offset_x, png_int_32 offset_y, int unit_type) { - png_debug1(1, "in %s storage function\n", "oFFs"); + png_debug1(1, "in %s storage function", "oFFs"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -380,141 +281,227 @@ png_set_oFFs(png_structp png_ptr, png_infop info_ptr, } #endif -#if defined(PNG_pCAL_SUPPORTED) +#ifdef PNG_pCAL_SUPPORTED void PNGAPI png_set_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params) + png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, + int nparams, png_const_charp units, png_charpp params) { - png_uint_32 length; + png_size_t length; int i; - png_debug1(1, "in %s storage function\n", "pCAL"); + png_debug1(1, "in %s storage function", "pCAL"); + if (png_ptr == NULL || info_ptr == NULL) return; length = png_strlen(purpose) + 1; - png_debug1(3, "allocating purpose for info (%lu bytes)\n", length); + png_debug1(3, "allocating purpose for info (%lu bytes)", + (unsigned long)length); + + /* TODO: validate format of calibration name and unit name */ + + /* Check that the type matches the specification. */ + if (type < 0 || type > 3) + png_error(png_ptr, "Invalid pCAL equation type"); + + /* Validate params[nparams] */ + for (i=0; ipcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_purpose == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL purpose."); - return; - } - png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); + { + png_warning(png_ptr, "Insufficient memory for pCAL purpose"); + return; + } - png_debug(3, "storing X0, X1, type, and nparams in info\n"); + png_memcpy(info_ptr->pcal_purpose, purpose, length); + + png_debug(3, "storing X0, X1, type, and nparams in info"); info_ptr->pcal_X0 = X0; info_ptr->pcal_X1 = X1; info_ptr->pcal_type = (png_byte)type; info_ptr->pcal_nparams = (png_byte)nparams; length = png_strlen(units) + 1; - png_debug1(3, "allocating units for info (%lu bytes)\n", length); + png_debug1(3, "allocating units for info (%lu bytes)", + (unsigned long)length); + info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_units == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL units."); - return; - } - png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); + { + png_warning(png_ptr, "Insufficient memory for pCAL units"); + return; + } + + png_memcpy(info_ptr->pcal_units, units, length); info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, - (png_uint_32)((nparams + 1) * png_sizeof(png_charp))); + (png_size_t)((nparams + 1) * png_sizeof(png_charp))); + if (info_ptr->pcal_params == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL params."); - return; - } + { + png_warning(png_ptr, "Insufficient memory for pCAL params"); + return; + } - info_ptr->pcal_params[nparams] = NULL; + png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp)); for (i = 0; i < nparams; i++) { length = png_strlen(params[i]) + 1; - png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length); + png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, + (unsigned long)length); + info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_params[i] == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL parameter."); - return; - } - png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); + { + png_warning(png_ptr, "Insufficient memory for pCAL parameter"); + return; + } + + png_memcpy(info_ptr->pcal_params[i], params[i], length); } info_ptr->valid |= PNG_INFO_pCAL; -#ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_PCAL; -#endif } #endif -#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED +#ifdef PNG_sCAL_SUPPORTED void PNGAPI -png_set_sCAL(png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height) +png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, + int unit, png_const_charp swidth, png_const_charp sheight) { - png_debug1(1, "in %s storage function\n", "sCAL"); + png_size_t lengthw = 0, lengthh = 0; + + png_debug1(1, "in %s storage function", "sCAL"); + if (png_ptr == NULL || info_ptr == NULL) return; - info_ptr->scal_unit = (png_byte)unit; - info_ptr->scal_pixel_width = width; - info_ptr->scal_pixel_height = height; + /* Double check the unit (should never get here with an invalid + * unit unless this is an API call.) + */ + if (unit != 1 && unit != 2) + png_error(png_ptr, "Invalid sCAL unit"); - info_ptr->valid |= PNG_INFO_sCAL; -} -#else -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, - int unit, png_charp swidth, png_charp sheight) -{ - png_uint_32 length; + if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 || + swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) + png_error(png_ptr, "Invalid sCAL width"); - png_debug1(1, "in %s storage function\n", "sCAL"); - if (png_ptr == NULL || info_ptr == NULL) - return; + if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 || + sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) + png_error(png_ptr, "Invalid sCAL height"); info_ptr->scal_unit = (png_byte)unit; - length = png_strlen(swidth) + 1; - png_debug1(3, "allocating unit for info (%d bytes)\n", length); - info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); + ++lengthw; + + png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); + + info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); + if (info_ptr->scal_s_width == NULL) { - png_warning(png_ptr, - "Memory allocation failed while processing sCAL."); + png_warning(png_ptr, "Memory allocation failed while processing sCAL"); + return; } - png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); - length = png_strlen(sheight) + 1; - png_debug1(3, "allocating unit for info (%d bytes)\n", length); - info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); + png_memcpy(info_ptr->scal_s_width, swidth, lengthw); + + ++lengthh; + + png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); + + info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); + if (info_ptr->scal_s_height == NULL) { png_free (png_ptr, info_ptr->scal_s_width); - png_warning(png_ptr, - "Memory allocation failed while processing sCAL."); + info_ptr->scal_s_width = NULL; + + png_warning(png_ptr, "Memory allocation failed while processing sCAL"); + return; } - png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); + + png_memcpy(info_ptr->scal_s_height, sheight, lengthh); info_ptr->valid |= PNG_INFO_sCAL; -#ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_SCAL; -#endif } -#endif -#endif + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, + double height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + /* Check the arguments. */ + if (width <= 0) + png_warning(png_ptr, "Invalid sCAL width ignored"); + + else if (height <= 0) + png_warning(png_ptr, "Invalid sCAL height ignored"); + + else + { + /* Convert 'width' and 'height' to ASCII. */ + char swidth[PNG_sCAL_MAX_DIGITS+1]; + char sheight[PNG_sCAL_MAX_DIGITS+1]; + + png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width, + PNG_sCAL_PRECISION); + png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height, + PNG_sCAL_PRECISION); + + png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); + } +} +# endif + +# ifdef PNG_FIXED_POINT_SUPPORTED +void PNGAPI +png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, + png_fixed_point width, png_fixed_point height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + /* Check the arguments. */ + if (width <= 0) + png_warning(png_ptr, "Invalid sCAL width ignored"); + + else if (height <= 0) + png_warning(png_ptr, "Invalid sCAL height ignored"); + + else + { + /* Convert 'width' and 'height' to ASCII. */ + char swidth[PNG_sCAL_MAX_DIGITS+1]; + char sheight[PNG_sCAL_MAX_DIGITS+1]; + + png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width); + png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height); + + png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); + } +} +# endif #endif -#if defined(PNG_pHYs_SUPPORTED) +#ifdef PNG_pHYs_SUPPORTED void PNGAPI png_set_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type) + png_uint_32 res_x, png_uint_32 res_y, int unit_type) { - png_debug1(1, "in %s storage function\n", "pHYs"); + png_debug1(1, "in %s storage function", "pHYs"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -527,177 +514,139 @@ png_set_pHYs(png_structp png_ptr, png_infop info_ptr, void PNGAPI png_set_PLTE(png_structp png_ptr, png_infop info_ptr, - png_colorp palette, int num_palette) + png_const_colorp palette, int num_palette) { - png_debug1(1, "in %s storage function\n", "PLTE"); + png_debug1(1, "in %s storage function", "PLTE"); + if (png_ptr == NULL || info_ptr == NULL) return; if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) - { - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) png_error(png_ptr, "Invalid palette length"); - else - { + + else + { png_warning(png_ptr, "Invalid palette length"); return; - } - } + } + } - /* - * It may not actually be necessary to set png_ptr->palette here; + /* It may not actually be necessary to set png_ptr->palette here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. */ -#ifdef PNG_FREE_ME_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); -#endif /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead - of num_palette entries, - in case of an invalid PNG file that has too-large sample values. */ - png_ptr->palette = (png_colorp)png_malloc(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); - png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH * - png_sizeof(png_color)); - png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color)); + * of num_palette entries, in case of an invalid PNG file that has + * too-large sample values. + */ + png_ptr->palette = (png_colorp)png_calloc(png_ptr, + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + + png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); info_ptr->palette = png_ptr->palette; info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; -#ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_PLTE; -#else - png_ptr->flags |= PNG_FLAG_FREE_PLTE; -#endif info_ptr->valid |= PNG_INFO_PLTE; } -#if defined(PNG_sBIT_SUPPORTED) +#ifdef PNG_sBIT_SUPPORTED void PNGAPI png_set_sBIT(png_structp png_ptr, png_infop info_ptr, - png_color_8p sig_bit) + png_const_color_8p sig_bit) { - png_debug1(1, "in %s storage function\n", "sBIT"); + png_debug1(1, "in %s storage function", "sBIT"); + if (png_ptr == NULL || info_ptr == NULL) return; - png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8)); + png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); info_ptr->valid |= PNG_INFO_sBIT; } #endif -#if defined(PNG_sRGB_SUPPORTED) +#ifdef PNG_sRGB_SUPPORTED void PNGAPI -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) +png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) { - png_debug1(1, "in %s storage function\n", "sRGB"); + png_debug1(1, "in %s storage function", "sRGB"); + if (png_ptr == NULL || info_ptr == NULL) return; - info_ptr->srgb_intent = (png_byte)intent; + info_ptr->srgb_intent = (png_byte)srgb_intent; info_ptr->valid |= PNG_INFO_sRGB; } void PNGAPI png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, - int intent) + int srgb_intent) { -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - float file_gamma; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_fixed_point int_file_gamma; -#endif -#endif -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - png_fixed_point 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 -#endif - png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); + png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); + if (png_ptr == NULL || info_ptr == NULL) return; - png_set_sRGB(png_ptr, info_ptr, intent); - -#if defined(PNG_gAMA_SUPPORTED) -#ifdef PNG_FLOATING_POINT_SUPPORTED - file_gamma = (float).45455; - png_set_gAMA(png_ptr, info_ptr, file_gamma); -#endif -#ifdef PNG_FIXED_POINT_SUPPORTED - int_file_gamma = 45455L; - png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); -#endif -#endif + png_set_sRGB(png_ptr, info_ptr, srgb_intent); -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FIXED_POINT_SUPPORTED - int_white_x = 31270L; - int_white_y = 32900L; - int_red_x = 64000L; - int_red_y = 33000L; - int_green_x = 30000L; - int_green_y = 60000L; - int_blue_x = 15000L; - int_blue_y = 6000L; +# ifdef PNG_gAMA_SUPPORTED + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); +# endif +# ifdef PNG_cHRM_SUPPORTED png_set_cHRM_fixed(png_ptr, info_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 -#ifdef PNG_FLOATING_POINT_SUPPORTED - white_x = (float).3127; - white_y = (float).3290; - red_x = (float).64; - red_y = (float).33; - green_x = (float).30; - green_y = (float).60; - blue_x = (float).15; - blue_y = (float).06; - - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); -#endif -#endif + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); +# endif /* cHRM */ } -#endif +#endif /* sRGB */ -#if defined(PNG_iCCP_SUPPORTED) +#ifdef PNG_iCCP_SUPPORTED void PNGAPI png_set_iCCP(png_structp png_ptr, png_infop info_ptr, - png_charp name, int compression_type, - png_charp profile, png_uint_32 proflen) + png_const_charp name, int compression_type, + png_const_bytep profile, png_uint_32 proflen) { png_charp new_iccp_name; - png_charp new_iccp_profile; + png_bytep new_iccp_profile; + png_size_t length; + + png_debug1(1, "in %s storage function", "iCCP"); - png_debug1(1, "in %s storage function\n", "iCCP"); if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) return; - new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1); + length = png_strlen(name)+1; + new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); + if (new_iccp_name == NULL) { - png_warning(png_ptr, "Insufficient memory to process iCCP chunk."); + png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); return; } - png_strncpy(new_iccp_name, name, png_sizeof(new_iccp_name)); - new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen); + + png_memcpy(new_iccp_name, name, length); + new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); + if (new_iccp_profile == NULL) { png_free (png_ptr, new_iccp_name); - png_warning(png_ptr, "Insufficient memory to process iCCP profile."); + png_warning(png_ptr, + "Insufficient memory to process iCCP profile"); return; } + png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); @@ -706,34 +655,34 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, info_ptr->iccp_name = new_iccp_name; info_ptr->iccp_profile = new_iccp_profile; /* Compression is always zero but is here so the API and info structure - * does not have to change if we introduce multiple compression types */ + * does not have to change if we introduce multiple compression types + */ info_ptr->iccp_compression = (png_byte)compression_type; -#ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_ICCP; -#endif info_ptr->valid |= PNG_INFO_iCCP; } #endif -#if defined(PNG_TEXT_SUPPORTED) +#ifdef PNG_TEXT_SUPPORTED void PNGAPI -png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, - int num_text) +png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, + int num_text) { int ret; - ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); + if (ret) - png_error(png_ptr, "Insufficient memory to store text"); + png_error(png_ptr, "Insufficient memory to store text"); } int /* PRIVATE */ -png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, - int num_text) +png_set_text_2(png_structp png_ptr, png_infop info_ptr, + png_const_textp text_ptr, int num_text) { int i; - png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? - "text" : (png_const_charp)png_ptr->chunk_name)); + png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" : + (unsigned long)png_ptr->chunk_name); if (png_ptr == NULL || info_ptr == NULL || num_text == 0) return(0); @@ -752,77 +701,93 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, info_ptr->max_text = info_ptr->num_text + num_text + 8; old_text = info_ptr->text; info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_uint_32)(info_ptr->max_text * png_sizeof (png_text))); + (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); + if (info_ptr->text == NULL) - { - png_free(png_ptr, old_text); - return(1); - } + { + png_free(png_ptr, old_text); + return(1); + } + png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * - png_sizeof(png_text))); + png_sizeof(png_text))); png_free(png_ptr, old_text); } + else { info_ptr->max_text = num_text + 8; info_ptr->num_text = 0; info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_uint_32)(info_ptr->max_text * png_sizeof (png_text))); + (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); if (info_ptr->text == NULL) - return(1); -#ifdef PNG_FREE_ME_SUPPORTED + return(1); info_ptr->free_me |= PNG_FREE_TEXT; -#endif } - png_debug1(3, "allocated %d entries for info_ptr->text\n", - info_ptr->max_text); + + png_debug1(3, "allocated %d entries for info_ptr->text", + info_ptr->max_text); } for (i = 0; i < num_text; i++) { - png_size_t text_length,key_len; - png_size_t lang_len,lang_key_len; + png_size_t text_length, key_len; + png_size_t lang_len, lang_key_len; png_textp textp = &(info_ptr->text[info_ptr->num_text]); if (text_ptr[i].key == NULL) continue; + if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || + text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) + { + png_warning(png_ptr, "text compression mode is out of range"); + continue; + } + key_len = png_strlen(text_ptr[i].key); - if(text_ptr[i].compression <= 0) + if (text_ptr[i].compression <= 0) { - lang_len = 0; - lang_key_len = 0; + lang_len = 0; + lang_key_len = 0; } + else -#ifdef PNG_iTXt_SUPPORTED +# ifdef PNG_iTXt_SUPPORTED { - /* set iTXt data */ - if (text_ptr[i].lang != NULL) - lang_len = png_strlen(text_ptr[i].lang); - else - lang_len = 0; - if (text_ptr[i].lang_key != NULL) - lang_key_len = png_strlen(text_ptr[i].lang_key); - else - lang_key_len = 0; + /* Set iTXt data */ + + if (text_ptr[i].lang != NULL) + lang_len = png_strlen(text_ptr[i].lang); + + else + lang_len = 0; + + if (text_ptr[i].lang_key != NULL) + lang_key_len = png_strlen(text_ptr[i].lang_key); + + else + lang_key_len = 0; } -#else +# else /* PNG_iTXt_SUPPORTED */ { - png_warning(png_ptr, "iTXt chunk not supported."); - continue; + png_warning(png_ptr, "iTXt chunk not supported"); + continue; } -#endif +# endif if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') { text_length = 0; -#ifdef PNG_iTXt_SUPPORTED - if(text_ptr[i].compression > 0) +# ifdef PNG_iTXt_SUPPORTED + if (text_ptr[i].compression > 0) textp->compression = PNG_ITXT_COMPRESSION_NONE; + else -#endif +# endif textp->compression = PNG_TEXT_COMPRESSION_NONE; } + else { text_length = png_strlen(text_ptr[i].text); @@ -830,414 +795,490 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, } textp->key = (png_charp)png_malloc_warn(png_ptr, - (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4)); + (png_size_t) + (key_len + text_length + lang_len + lang_key_len + 4)); + if (textp->key == NULL) - return(1); - png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n", - (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4), - (int)textp->key); - - png_memcpy(textp->key, text_ptr[i].key, - (png_size_t)(key_len)); - *(textp->key+key_len) = '\0'; -#ifdef PNG_iTXt_SUPPORTED + return(1); + + png_debug2(2, "Allocated %lu bytes at %p in png_set_text", + (unsigned long)(png_uint_32) + (key_len + lang_len + lang_key_len + text_length + 4), + textp->key); + + png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); + *(textp->key + key_len) = '\0'; + if (text_ptr[i].compression > 0) { - textp->lang=textp->key + key_len + 1; + textp->lang = textp->key + key_len + 1; png_memcpy(textp->lang, text_ptr[i].lang, lang_len); - *(textp->lang+lang_len) = '\0'; - textp->lang_key=textp->lang + lang_len + 1; + *(textp->lang + lang_len) = '\0'; + textp->lang_key = textp->lang + lang_len + 1; png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); - *(textp->lang_key+lang_key_len) = '\0'; - textp->text=textp->lang_key + lang_key_len + 1; + *(textp->lang_key + lang_key_len) = '\0'; + textp->text = textp->lang_key + lang_key_len + 1; } + else -#endif { -#ifdef PNG_iTXt_SUPPORTED textp->lang=NULL; textp->lang_key=NULL; -#endif - textp->text=textp->key + key_len + 1; + textp->text = textp->key + key_len + 1; } - if(text_length) + + if (text_length) png_memcpy(textp->text, text_ptr[i].text, - (png_size_t)(text_length)); - *(textp->text+text_length) = '\0'; + (png_size_t)(text_length)); -#ifdef PNG_iTXt_SUPPORTED - if(textp->compression > 0) + *(textp->text + text_length) = '\0'; + +# ifdef PNG_iTXt_SUPPORTED + if (textp->compression > 0) { textp->text_length = 0; textp->itxt_length = text_length; } + else -#endif +# endif { textp->text_length = text_length; -#ifdef PNG_iTXt_SUPPORTED textp->itxt_length = 0; -#endif } + info_ptr->num_text++; - png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); + png_debug1(3, "transferred text chunk %d", info_ptr->num_text); } return(0); } #endif -#if defined(PNG_tIME_SUPPORTED) +#ifdef PNG_tIME_SUPPORTED void PNGAPI -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) +png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) { - png_debug1(1, "in %s storage function\n", "tIME"); + png_debug1(1, "in %s storage function", "tIME"); + if (png_ptr == NULL || info_ptr == NULL || (png_ptr->mode & PNG_WROTE_tIME)) return; - png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time)); + if (mod_time->month == 0 || mod_time->month > 12 || + mod_time->day == 0 || mod_time->day > 31 || + mod_time->hour > 23 || mod_time->minute > 59 || + mod_time->second > 60) + { + png_warning(png_ptr, "Ignoring invalid time value"); + return; + } + + png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); info_ptr->valid |= PNG_INFO_tIME; } #endif -#if defined(PNG_tRNS_SUPPORTED) +#ifdef PNG_tRNS_SUPPORTED void PNGAPI png_set_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep trans, int num_trans, png_color_16p trans_values) + png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) { - png_debug1(1, "in %s storage function\n", "tRNS"); + png_debug1(1, "in %s storage function", "tRNS"); + if (png_ptr == NULL || info_ptr == NULL) return; - if (trans != NULL) + if (trans_alpha != NULL) { - /* - * It may not actually be necessary to set png_ptr->trans here; + /* It may not actually be necessary to set png_ptr->trans_alpha here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. */ -#ifdef PNG_FREE_ME_SUPPORTED + png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); -#endif + /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ - png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, - (png_uint_32)PNG_MAX_PALETTE_LENGTH); - if (num_trans <= PNG_MAX_PALETTE_LENGTH) - png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_TRNS; -#else - png_ptr->flags |= PNG_FLAG_FREE_TRNS; -#endif + png_ptr->trans_alpha = info_ptr->trans_alpha = + (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); + + if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) + png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); } - if (trans_values != NULL) + if (trans_color != NULL) { - png_memcpy(&(info_ptr->trans_values), trans_values, + int sample_max = (1 << info_ptr->bit_depth); + + if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && + (int)trans_color->gray > sample_max) || + (info_ptr->color_type == PNG_COLOR_TYPE_RGB && + ((int)trans_color->red > sample_max || + (int)trans_color->green > sample_max || + (int)trans_color->blue > sample_max))) + png_warning(png_ptr, + "tRNS chunk has out-of-range samples for bit_depth"); + + png_memcpy(&(info_ptr->trans_color), trans_color, png_sizeof(png_color_16)); + if (num_trans == 0) - num_trans = 1; + num_trans = 1; } + info_ptr->num_trans = (png_uint_16)num_trans; - info_ptr->valid |= PNG_INFO_tRNS; + + if (num_trans != 0) + { + info_ptr->valid |= PNG_INFO_tRNS; + info_ptr->free_me |= PNG_FREE_TRNS; + } } #endif -#if defined(PNG_sPLT_SUPPORTED) +#ifdef PNG_sPLT_SUPPORTED void PNGAPI png_set_sPLT(png_structp png_ptr, - png_infop info_ptr, png_sPLT_tp entries, int nentries) + png_infop info_ptr, png_const_sPLT_tp entries, int nentries) +/* + * entries - array of png_sPLT_t structures + * to be added to the list of palettes + * in the info structure. + * + * nentries - number of palette structures to be + * added. + */ { - png_sPLT_tp np; - int i; + png_sPLT_tp np; + int i; - if (png_ptr == NULL || info_ptr == NULL) - return; + if (png_ptr == NULL || info_ptr == NULL) + return; - np = (png_sPLT_tp)png_malloc_warn(png_ptr, - (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t)); - if (np == NULL) - { - png_warning(png_ptr, "No memory for sPLT palettes."); + np = (png_sPLT_tp)png_malloc_warn(png_ptr, + (info_ptr->splt_palettes_num + nentries) * + (png_size_t)png_sizeof(png_sPLT_t)); + + if (np == NULL) + { + png_warning(png_ptr, "No memory for sPLT palettes"); return; - } + } - png_memcpy(np, info_ptr->splt_palettes, - info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); - png_free(png_ptr, info_ptr->splt_palettes); - info_ptr->splt_palettes=NULL; + png_memcpy(np, info_ptr->splt_palettes, + info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); - for (i = 0; i < nentries; i++) - { - png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; - png_sPLT_tp from = entries + i; - - to->name = (png_charp)png_malloc_warn(png_ptr, - png_strlen(from->name) + 1); - if (to->name == NULL) - { - png_warning(png_ptr, + png_free(png_ptr, info_ptr->splt_palettes); + info_ptr->splt_palettes=NULL; + + for (i = 0; i < nentries; i++) + { + png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; + png_const_sPLT_tp from = entries + i; + png_size_t length; + + length = png_strlen(from->name) + 1; + to->name = (png_charp)png_malloc_warn(png_ptr, length); + + if (to->name == NULL) + { + png_warning(png_ptr, "Out of memory while processing sPLT chunk"); - } - /* TODO: use png_malloc_warn */ - png_strncpy(to->name, from->name, png_strlen(from->name)); - to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, - from->nentries * png_sizeof(png_sPLT_entry)); - /* TODO: use png_malloc_warn */ - png_memcpy(to->entries, from->entries, - from->nentries * png_sizeof(png_sPLT_entry)); - if (to->entries == NULL) - { - png_warning(png_ptr, + continue; + } + + png_memcpy(to->name, from->name, length); + to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, + from->nentries * png_sizeof(png_sPLT_entry)); + + if (to->entries == NULL) + { + png_warning(png_ptr, "Out of memory while processing sPLT chunk"); - png_free(png_ptr,to->name); - to->name = NULL; - } - to->nentries = from->nentries; - to->depth = from->depth; - } + png_free(png_ptr, to->name); + to->name = NULL; + continue; + } - info_ptr->splt_palettes = np; - info_ptr->splt_palettes_num += nentries; - info_ptr->valid |= PNG_INFO_sPLT; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_SPLT; -#endif + png_memcpy(to->entries, from->entries, + from->nentries * png_sizeof(png_sPLT_entry)); + + to->nentries = from->nentries; + to->depth = from->depth; + } + + info_ptr->splt_palettes = np; + info_ptr->splt_palettes_num += nentries; + info_ptr->valid |= PNG_INFO_sPLT; + info_ptr->free_me |= PNG_FREE_SPLT; } #endif /* PNG_sPLT_SUPPORTED */ -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED void PNGAPI png_set_unknown_chunks(png_structp png_ptr, - png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) + png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) { - png_unknown_chunkp np; - int i; + png_unknown_chunkp np; + int i; - if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) - return; + if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) + return; - np = (png_unknown_chunkp)png_malloc_warn(png_ptr, - (info_ptr->unknown_chunks_num + num_unknowns) * - png_sizeof(png_unknown_chunk)); - if (np == NULL) - { - png_warning(png_ptr, - "Out of memory while processing unknown chunk."); - return; - } + np = (png_unknown_chunkp)png_malloc_warn(png_ptr, + (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * + png_sizeof(png_unknown_chunk)); - png_memcpy(np, info_ptr->unknown_chunks, - info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk)); - png_free(png_ptr, info_ptr->unknown_chunks); - info_ptr->unknown_chunks=NULL; + if (np == NULL) + { + png_warning(png_ptr, + "Out of memory while processing unknown chunk"); + return; + } - for (i = 0; i < num_unknowns; i++) - { - png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; - png_unknown_chunkp from = unknowns + i; - - png_strncpy((png_charp)to->name, (png_charp)from->name, 5); - to->data = (png_bytep)png_malloc_warn(png_ptr, from->size); - if (to->data == NULL) - { - png_warning(png_ptr, - "Out of memory while processing unknown chunk."); - } - else - { - png_memcpy(to->data, from->data, from->size); - to->size = from->size; - - /* note our location in the read or write sequence */ - to->location = (png_byte)(png_ptr->mode & 0xff); - } - } + png_memcpy(np, info_ptr->unknown_chunks, + (png_size_t)info_ptr->unknown_chunks_num * + png_sizeof(png_unknown_chunk)); - info_ptr->unknown_chunks = np; - info_ptr->unknown_chunks_num += num_unknowns; -#ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_UNKN; -#endif + png_free(png_ptr, info_ptr->unknown_chunks); + info_ptr->unknown_chunks = NULL; + + for (i = 0; i < num_unknowns; i++) + { + png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; + png_const_unknown_chunkp from = unknowns + i; + + png_memcpy(to->name, from->name, png_sizeof(from->name)); + to->name[png_sizeof(to->name)-1] = '\0'; + to->size = from->size; + + /* Note our location in the read or write sequence */ + to->location = (png_byte)(png_ptr->mode & 0xff); + + if (from->size == 0) + to->data=NULL; + + else + { + to->data = (png_bytep)png_malloc_warn(png_ptr, + (png_size_t)from->size); + + if (to->data == NULL) + { + png_warning(png_ptr, + "Out of memory while processing unknown chunk"); + to->size = 0; + } + + else + png_memcpy(to->data, from->data, from->size); + } + } + + info_ptr->unknown_chunks = np; + info_ptr->unknown_chunks_num += num_unknowns; + info_ptr->free_me |= PNG_FREE_UNKN; } + void PNGAPI png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, - int chunk, int location) + int chunk, int location) { - if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < - (int)info_ptr->unknown_chunks_num) + if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < + info_ptr->unknown_chunks_num) info_ptr->unknown_chunks[chunk].location = (png_byte)location; } #endif -#if defined(PNG_1_0_X) || defined(PNG_1_2_X) -#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ - defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -void PNGAPI -png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) -{ - /* This function is deprecated in favor of png_permit_mng_features() - and will be removed from libpng-1.3.0 */ - png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); - if (png_ptr == NULL) - return; - png_ptr->mng_features_permitted = (png_byte) - ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) | - ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); -} -#endif -#endif -#if defined(PNG_MNG_FEATURES_SUPPORTED) +#ifdef PNG_MNG_FEATURES_SUPPORTED png_uint_32 PNGAPI png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) { - png_debug(1, "in png_permit_mng_features\n"); + png_debug(1, "in png_permit_mng_features"); + if (png_ptr == NULL) return (png_uint_32)0; + png_ptr->mng_features_permitted = - (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + return (png_uint_32)png_ptr->mng_features_permitted; } #endif -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED void PNGAPI -png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep - chunk_list, int num_chunks) +png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep + chunk_list, int num_chunks) { - png_bytep new_list, p; - int i, old_num_chunks; - if (png_ptr == NULL) - return; - if (num_chunks == 0) - { - if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) - png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + png_bytep new_list, p; + int i, old_num_chunks; + if (png_ptr == NULL) + return; + + if (num_chunks == 0) + { + if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) + png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + + if (keep == PNG_HANDLE_CHUNK_ALWAYS) + png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; - if(keep == PNG_HANDLE_CHUNK_ALWAYS) - png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; + png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; + return; - } - if (chunk_list == NULL) + } + + if (chunk_list == NULL) return; - old_num_chunks=png_ptr->num_chunk_list; - new_list=(png_bytep)png_malloc(png_ptr, - (png_uint_32)(5*(num_chunks+old_num_chunks))); - if(png_ptr->chunk_list != NULL) - { - png_memcpy(new_list, png_ptr->chunk_list, + + old_num_chunks = png_ptr->num_chunk_list; + new_list=(png_bytep)png_malloc(png_ptr, + (png_size_t)(5*(num_chunks + old_num_chunks))); + + if (png_ptr->chunk_list != NULL) + { + png_memcpy(new_list, png_ptr->chunk_list, (png_size_t)(5*old_num_chunks)); - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list=NULL; - } - png_memcpy(new_list+5*old_num_chunks, chunk_list, + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->chunk_list=NULL; + } + + png_memcpy(new_list + 5*old_num_chunks, chunk_list, (png_size_t)(5*num_chunks)); - for (p=new_list+5*old_num_chunks+4, i=0; inum_chunk_list=old_num_chunks+num_chunks; - png_ptr->chunk_list=new_list; -#ifdef PNG_FREE_ME_SUPPORTED - png_ptr->free_me |= PNG_FREE_LIST; -#endif + + for (p = new_list + 5*old_num_chunks + 4, i = 0; inum_chunk_list = old_num_chunks + num_chunks; + png_ptr->chunk_list = new_list; + png_ptr->free_me |= PNG_FREE_LIST; } #endif -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED void PNGAPI png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, - png_user_chunk_ptr read_user_chunk_fn) + png_user_chunk_ptr read_user_chunk_fn) { - png_debug(1, "in png_set_read_user_chunk_fn\n"); + png_debug(1, "in png_set_read_user_chunk_fn"); + if (png_ptr == NULL) return; + png_ptr->read_user_chunk_fn = read_user_chunk_fn; png_ptr->user_chunk_ptr = user_chunk_ptr; } #endif -#if defined(PNG_INFO_IMAGE_SUPPORTED) +#ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) { - png_debug1(1, "in %s storage function\n", "rows"); + png_debug1(1, "in %s storage function", "rows"); if (png_ptr == NULL || info_ptr == NULL) return; - if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) + if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); + info_ptr->row_pointers = row_pointers; - if(row_pointers) + + if (row_pointers) info_ptr->valid |= PNG_INFO_IDAT; } #endif -#ifdef PNG_WRITE_SUPPORTED void PNGAPI -png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size) +png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) { if (png_ptr == NULL) return; - if(png_ptr->zbuf) - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf_size = (png_size_t)size; + + png_free(png_ptr, png_ptr->zbuf); + + if (size > ZLIB_IO_MAX) + { + png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); + png_ptr->zbuf_size = ZLIB_IO_MAX; + size = ZLIB_IO_MAX; /* must fit */ + } + + else + png_ptr->zbuf_size = (uInt)size; + png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); + + /* The following ensures a relatively safe failure if this gets called while + * the buffer is actually in use. + */ png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + png_ptr->zstream.avail_out = 0; + png_ptr->zstream.avail_in = 0; } -#endif void PNGAPI png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) { if (png_ptr && info_ptr) - info_ptr->valid &= ~(mask); + info_ptr->valid &= ~mask; } -#ifndef PNG_1_0_X -#ifdef PNG_ASSEMBLER_CODE_SUPPORTED -/* function was added to libpng 1.2.0 and should always exist by default */ + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +/* This function was added to libpng 1.2.6 */ void PNGAPI -png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) +png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, + png_uint_32 user_height_max) { -/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ - if (png_ptr != NULL) - png_ptr->asm_flags = 0; + /* Images with dimensions larger than these limits will be + * rejected by png_set_IHDR(). To accept any PNG datastream + * regardless of dimensions, set both limits to 0x7ffffffL. + */ + if (png_ptr == NULL) + return; + + png_ptr->user_width_max = user_width_max; + png_ptr->user_height_max = user_height_max; } -/* this function was added to libpng 1.2.0 */ +/* This function was added to libpng 1.4.0 */ void PNGAPI -png_set_mmx_thresholds (png_structp png_ptr, - png_byte mmx_bitdepth_threshold, - png_uint_32 mmx_rowbytes_threshold) +png_set_chunk_cache_max (png_structp png_ptr, + png_uint_32 user_chunk_cache_max) { -/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ - if (png_ptr == NULL) - return; + if (png_ptr) + png_ptr->user_chunk_cache_max = user_chunk_cache_max; } -#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ -#ifdef PNG_SET_USER_LIMITS_SUPPORTED -/* this function was added to libpng 1.2.6 */ +/* This function was added to libpng 1.4.1 */ void PNGAPI -png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, - png_uint_32 user_height_max) +png_set_chunk_malloc_max (png_structp png_ptr, + png_alloc_size_t user_chunk_malloc_max) { - /* Images with dimensions larger than these limits will be - * rejected by png_set_IHDR(). To accept any PNG datastream - * regardless of dimensions, set both limits to 0x7ffffffL. - */ - if(png_ptr == NULL) return; - png_ptr->user_width_max = user_width_max; - png_ptr->user_height_max = user_height_max; + if (png_ptr) + png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; } #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ -#endif /* ?PNG_1_0_X */ + +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +void PNGAPI +png_set_benign_errors(png_structp png_ptr, int allowed) +{ + png_debug(1, "in png_set_benign_errors"); + + if (allowed) + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + + else + png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; +} +#endif /* PNG_BENIGN_ERRORS_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */