diff options
Diffstat (limited to 'com32/lib/libpng/pngset.c')
| -rw-r--r-- | com32/lib/libpng/pngset.c | 995 |
1 files changed, 501 insertions, 494 deletions
diff --git a/com32/lib/libpng/pngset.c b/com32/lib/libpng/pngset.c index 13ecb281..717757fc 100644 --- a/com32/lib/libpng/pngset.c +++ b/com32/lib/libpng/pngset.c @@ -1,12 +1,15 @@ /* pngset.c - storage of image information into info struct * - * libpng 1.2.8 - December 3, 2004 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2004 Glenn Randers-Pehrson + * Last changed in libpng 1.2.43 [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 + * * 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 @@ -14,13 +17,16 @@ */ #define PNG_INTERNAL +#define PNG_NO_PEDANTIC_WARNINGS #include "png.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_debug1(1, "in %s storage function\n", "bKGD"); + png_debug1(1, "in %s storage function", "bKGD"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -29,35 +35,17 @@ png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) } #endif -#if defined(PNG_cHRM_SUPPORTED) +#ifdef 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) { - png_debug1(1, "in %s storage function\n", "cHRM"); - if (png_ptr == NULL || info_ptr == NULL) - return; + png_debug1(1, "in %s storage function", "cHRM"); - 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) - { - 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"); + if (png_ptr == NULL || info_ptr == NULL) return; - } info_ptr->x_white = (float)white_x; info_ptr->y_white = (float)white_y; @@ -79,7 +67,8 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr, #endif info_ptr->valid |= PNG_INFO_cHRM; } -#endif +#endif /* PNG_FLOATING_POINT_SUPPORTED */ + #ifdef PNG_FIXED_POINT_SUPPORTED void PNGAPI png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, @@ -87,62 +76,49 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, 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 || white_y < 0 || - red_x < 0 || red_y < 0 || - green_x < 0 || green_y < 0 || - blue_x < 0 || blue_y < 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; + 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; } - 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) - { - 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; } -#endif -#endif +#endif /* PNG_FIXED_POINT_SUPPORTED */ +#endif /* PNG_cHRM_SUPPORTED */ -#if defined(PNG_gAMA_SUPPORTED) +#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) { - double gamma; - png_debug1(1, "in %s storage function\n", "gAMA"); + double png_gamma; + + png_debug1(1, "in %s storage function", "gAMA"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -150,16 +126,16 @@ png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) if (file_gamma > 21474.83) { png_warning(png_ptr, "Limiting gamma to 21474.83"); - gamma=21474.83; + png_gamma=21474.83; } else - gamma=file_gamma; - info_ptr->gamma = (float)gamma; + png_gamma = file_gamma; + info_ptr->gamma = (float)png_gamma; #ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = (int)(gamma*100000.+.5); + info_ptr->int_gamma = (int)(png_gamma*100000.+.5); #endif info_ptr->valid |= PNG_INFO_gAMA; - if(gamma == 0.0) + if (png_gamma == 0.0) png_warning(png_ptr, "Setting gamma=0"); } #endif @@ -167,69 +143,75 @@ void PNGAPI png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point int_gamma) { - png_fixed_point gamma; + png_fixed_point png_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) + if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX) { - png_warning(png_ptr, "Limiting gamma to 21474.83"); - gamma=PNG_UINT_31_MAX; + png_warning(png_ptr, "Limiting gamma to 21474.83"); + png_gamma=PNG_UINT_31_MAX; } else { - if (int_gamma < 0) - { - png_warning(png_ptr, "Setting negative gamma to zero"); - gamma=0; - } - else - gamma=int_gamma; + if (int_gamma < 0) + { + png_warning(png_ptr, "Setting negative gamma to zero"); + png_gamma = 0; + } + else + png_gamma = int_gamma; } #ifdef PNG_FLOATING_POINT_SUPPORTED - info_ptr->gamma = (float)(gamma/100000.); + info_ptr->gamma = (float)(png_gamma/100000.); #endif #ifdef PNG_FIXED_POINT_SUPPORTED - info_ptr->int_gamma = gamma; + info_ptr->int_gamma = png_gamma; #endif info_ptr->valid |= PNG_INFO_gAMA; - if(gamma == 0) + if (png_gamma == 0) png_warning(png_ptr, "Setting gamma=0"); } #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) { 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) + + if (info_ptr->num_palette == 0 || info_ptr->num_palette + > PNG_MAX_PALETTE_LENGTH) { - png_warning(png_ptr, - "Palette size 0, 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 256 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)(256 * png_sizeof (png_uint_16))); + (png_uint_32)(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; @@ -247,86 +229,23 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, 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\n"); - 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) @@ -337,8 +256,8 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, 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 + /* Check for potential overflow */ + if (width > (PNG_UINT_32_MAX >> 3) /* 8-byte RGBA pixels */ - 64 /* bigrowbuf hack */ - 1 /* filter byte */ @@ -346,15 +265,16 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, - 8) /* extra max_pixel_depth pad */ info_ptr->rowbytes = (png_size_t)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_debug1(1, "in %s storage function\n", "oFFs"); + png_debug1(1, "in %s storage function", "oFFs"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -365,7 +285,7 @@ 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, @@ -374,56 +294,60 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 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); info_ptr->pcal_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_warning(png_ptr, "Insufficient memory for pCAL purpose."); + return; + } png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); - png_debug(3, "storing X0, X1, type, and nparams in info\n"); + 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_warning(png_ptr, "Insufficient memory for pCAL units."); + return; + } png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, (png_uint_32)((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_warning(png_ptr, "Insufficient memory for pCAL parameter."); + return; + } png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); } @@ -440,7 +364,8 @@ 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\n", "sCAL"); + png_debug1(1, "in %s storage function", "sCAL"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -458,31 +383,38 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, { png_uint_32 length; - png_debug1(1, "in %s storage function\n", "sCAL"); + png_debug1(1, "in %s storage function", "sCAL"); + if (png_ptr == NULL || info_ptr == NULL) return; info_ptr->scal_unit = (png_byte)unit; length = png_strlen(swidth) + 1; - png_debug1(3, "allocating unit for info (%d bytes)\n", length); + png_debug1(3, "allocating unit for info (%u bytes)", + (unsigned int)length); info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); 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); + png_debug1(3, "allocating unit for info (%u bytes)", + (unsigned int)length); info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); 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); - info_ptr->valid |= PNG_INFO_sCAL; #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_SCAL; @@ -492,12 +424,13 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, #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_debug1(1, "in %s storage function\n", "pHYs"); + png_debug1(1, "in %s storage function", "pHYs"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -513,12 +446,23 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, png_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; - /* - * It may not actually be necessary to set png_ptr->palette here; + if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) + { + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + png_error(png_ptr, "Invalid palette length"); + else + { + png_warning(png_ptr, "Invalid palette length"); + return; + } + } + + /* 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. */ @@ -526,12 +470,13 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); #endif - /* Changed in libpng-1.2.1 to allocate 256 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, - 256 * png_sizeof(png_color)); - png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color)); - png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color)); + /* 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_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; @@ -544,25 +489,27 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, 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_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_debug1(1, "in %s storage function\n", "sRGB"); + png_debug1(1, "in %s storage function", "sRGB"); + if (png_ptr == NULL || info_ptr == NULL) return; @@ -574,7 +521,7 @@ void PNGAPI png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, int intent) { -#if defined(PNG_gAMA_SUPPORTED) +#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED float file_gamma; #endif @@ -582,22 +529,21 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, png_fixed_point int_file_gamma; #endif #endif -#if defined(PNG_cHRM_SUPPORTED) +#ifdef 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_gAMA_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED file_gamma = (float).45455; png_set_gAMA(png_ptr, info_ptr, file_gamma); @@ -608,8 +554,7 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, #endif #endif -#if defined(PNG_cHRM_SUPPORTED) -#ifdef PNG_FIXED_POINT_SUPPORTED +#ifdef PNG_cHRM_SUPPORTED int_white_x = 31270L; int_white_y = 32900L; int_red_x = 64000L; @@ -619,10 +564,6 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, int_blue_x = 15000L; int_blue_y = 6000L; - 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; @@ -632,16 +573,23 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, green_y = (float).60; blue_x = (float).15; blue_y = (float).06; +#endif - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); +#ifdef PNG_FIXED_POINT_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 + 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 /* 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, @@ -649,23 +597,27 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, { png_charp new_iccp_name; png_charp new_iccp_profile; + png_uint_32 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_strcpy(new_iccp_name, name); + png_memcpy(new_iccp_name, name, length); new_iccp_profile = (png_charp)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); @@ -676,7 +628,8 @@ 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; @@ -685,24 +638,25 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, } #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) + 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) + int num_text) { int i; - png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? + png_debug1(1, "in %s storage function", ((png_ptr == NULL || + png_ptr->chunk_name[0] == '\0') ? "text" : (png_const_charp)png_ptr->chunk_name)); if (png_ptr == NULL || info_ptr == NULL || num_text == 0) @@ -722,12 +676,12 @@ 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_uint_32)(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_free(png_ptr, old_text); @@ -737,20 +691,20 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 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_uint_32)(info_ptr->max_text * png_sizeof(png_text))); if (info_ptr->text == NULL) - return(1); + return(1); #ifdef PNG_FREE_ME_SUPPORTED info_ptr->free_me |= PNG_FREE_TEXT; #endif } - png_debug1(3, "allocated %d entries for info_ptr->text\n", + 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) @@ -758,28 +712,30 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 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 { - /* 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 @@ -787,12 +743,13 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, { text_length = 0; #ifdef PNG_iTXt_SUPPORTED - if(text_ptr[i].compression > 0) + if (text_ptr[i].compression > 0) textp->compression = PNG_ITXT_COMPRESSION_NONE; else #endif textp->compression = PNG_TEXT_COMPRESSION_NONE; } + else { text_length = png_strlen(text_ptr[i].text); @@ -800,26 +757,27 @@ 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_uint_32) + (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'; + return(1); + png_debug2(2, "Allocated %lu bytes at %x in png_set_text", + (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 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 @@ -828,222 +786,277 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, 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'; + *(textp->text + text_length) = '\0'; #ifdef PNG_iTXt_SUPPORTED - if(textp->compression > 0) + if (textp->compression > 0) { textp->text_length = 0; textp->itxt_length = text_length; } else #endif + { textp->text_length = text_length; #ifdef PNG_iTXt_SUPPORTED textp->itxt_length = 0; #endif } - info_ptr->text[info_ptr->num_text]= *textp; 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_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)); + 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_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) { - /* - * It may not actually be necessary to set png_ptr->trans here; + /* It may not actually be necessary to set png_ptr->trans 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 256 in version 1.2.1 */ + + /* 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)256); - 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_uint_32)PNG_MAX_PALETTE_LENGTH); + if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) + png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); } if (trans_values != NULL) { + int sample_max = (1 << info_ptr->bit_depth); + if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && + (int)trans_values->gray > sample_max) || + (info_ptr->color_type == PNG_COLOR_TYPE_RGB && + ((int)trans_values->red > sample_max || + (int)trans_values->green > sample_max || + (int)trans_values->blue > sample_max))) + png_warning(png_ptr, + "tRNS chunk has out-of-range samples for bit_depth"); png_memcpy(&(info_ptr->trans_values), trans_values, 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; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_TRNS; +#else + png_ptr->flags |= PNG_FLAG_FREE_TRNS; +#endif + } } #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) +/* + * 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; - np = (png_sPLT_tp)png_malloc_warn(png_ptr, - (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t)); - if (np == NULL) - { + if (png_ptr == NULL || info_ptr == NULL) + return; + + np = (png_sPLT_tp)png_malloc_warn(png_ptr, + (info_ptr->splt_palettes_num + nentries) * + (png_uint_32)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; - - 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(png_ptr, - png_strlen(from->name) + 1); - /* TODO: use png_malloc_warn */ - png_strcpy(to->name, from->name); - to->entries = (png_sPLT_entryp)png_malloc(png_ptr, - from->nentries * png_sizeof(png_sPLT_t)); - /* TODO: use png_malloc_warn */ - png_memcpy(to->entries, from->entries, - from->nentries * png_sizeof(png_sPLT_t)); - 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; + } + + 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; + + for (i = 0; i < nentries; i++) + { + png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; + png_sPLT_tp from = entries + i; + png_uint_32 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"); + continue; + } + png_memcpy(to->name, from->name, length); + to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, + (png_uint_32)(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; + continue; + } + 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; #ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_SPLT; + info_ptr->free_me |= PNG_FREE_SPLT; #endif } #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_unknown_chunkp np; - int i; - - 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; - } - - 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; - - 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 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); - } - } - - info_ptr->unknown_chunks = np; - info_ptr->unknown_chunks_num += num_unknowns; + png_unknown_chunkp np; + int i; + + if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) + return; + + np = (png_unknown_chunkp)png_malloc_warn(png_ptr, + (png_uint_32)((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; + } + + 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; + + 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_memcpy((png_charp)to->name, (png_charp)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_uint_32)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; #ifdef PNG_FREE_ME_SUPPORTED - info_ptr->free_me |= PNG_FREE_UNKN; + info_ptr->free_me |= PNG_FREE_UNKN; #endif } void PNGAPI png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, 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 < + (int)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-2.0.0 */ - png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n"); + and will be removed from libpng-1.3.0 */ + + png_debug(1, "in png_permit_empty_plte, DEPRECATED."); + if (png_ptr == NULL) return; png_ptr->mng_features_permitted = (png_byte) - ((png_ptr->mng_features_permitted & (~(PNG_FLAG_MNG_EMPTY_PLTE))) | + ((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 = @@ -1052,168 +1065,162 @@ png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) } #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_bytep new_list, p; - int i, old_num_chunks; - 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_uint_32) + (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; i<num_chunks; i++, p+=5) - *p=(png_byte)keep; - png_ptr->num_chunk_list=old_num_chunks+num_chunks; - png_ptr->chunk_list=new_list; + for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5) + *p=(png_byte)keep; + png_ptr->num_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; + png_ptr->free_me |= PNG_FREE_LIST; #endif } #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_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_uint_32 size) { - if(png_ptr->zbuf) - png_free(png_ptr, png_ptr->zbuf); + if (png_ptr == NULL) + return; + png_free(png_ptr, png_ptr->zbuf); png_ptr->zbuf_size = (png_size_t)size; png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); png_ptr->zstream.next_out = png_ptr->zbuf; png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; } -#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 -/* this function was added to libpng 1.2.0 and should always exist by default */ +/* Function was added to libpng 1.2.0 and should always exist by default */ void PNGAPI png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) { - png_uint_32 settable_asm_flags; - png_uint_32 settable_mmx_flags; - - settable_mmx_flags = -#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW - PNG_ASM_FLAG_MMX_READ_COMBINE_ROW | -#endif -#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE - PNG_ASM_FLAG_MMX_READ_INTERLACE | -#endif -#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW - PNG_ASM_FLAG_MMX_READ_FILTER_SUB | - PNG_ASM_FLAG_MMX_READ_FILTER_UP | - PNG_ASM_FLAG_MMX_READ_FILTER_AVG | - PNG_ASM_FLAG_MMX_READ_FILTER_PAETH | -#endif - 0; - - /* could be some non-MMX ones in the future, but not currently: */ - settable_asm_flags = settable_mmx_flags; - - if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) || - !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU)) - { - /* clear all MMX flags if MMX isn't supported */ - settable_asm_flags &= ~settable_mmx_flags; - png_ptr->asm_flags &= ~settable_mmx_flags; - } - - /* we're replacing the settable bits with those passed in by the user, - * so first zero them out of the master copy, then logical-OR in the - * allowed subset that was requested */ - - png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */ - png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */ +/* 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; + asm_flags = asm_flags; /* Quiet the compiler */ } -#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ -#ifdef PNG_ASSEMBLER_CODE_SUPPORTED -/* this function was added to libpng 1.2.0 */ +/* This function was added to libpng 1.2.0 */ void PNGAPI png_set_mmx_thresholds (png_structp png_ptr, png_byte mmx_bitdepth_threshold, png_uint_32 mmx_rowbytes_threshold) { - png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold; - png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold; +/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ + if (png_ptr == NULL) + return; + /* Quiet the compiler */ + mmx_bitdepth_threshold = mmx_bitdepth_threshold; + mmx_rowbytes_threshold = mmx_rowbytes_threshold; } #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 1.2.6 */ void PNGAPI png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_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. - */ - png_ptr->user_width_max = user_width_max; - png_ptr->user_height_max = user_height_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; } #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ + +#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_1_0_X */ +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |