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author | dimitri <dimitri@afe2bf4a-e733-0410-8a33-86f594647bc7> | 2008-01-16 19:20:21 (GMT) |
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committer | dimitri <dimitri@afe2bf4a-e733-0410-8a33-86f594647bc7> | 2008-01-16 19:20:21 (GMT) |
commit | 8dab665567c9dffaa3f5fea198fc2110d536594d (patch) | |
tree | 78bac4e928b25e139605aceefa82537f378d8af0 /libpng/pngget.c | |
parent | d3461a1c31f008345d784dc3e819047bc5265c30 (diff) | |
download | Doxygen-8dab665567c9dffaa3f5fea198fc2110d536594d.zip Doxygen-8dab665567c9dffaa3f5fea198fc2110d536594d.tar.gz Doxygen-8dab665567c9dffaa3f5fea198fc2110d536594d.tar.bz2 |
Release-1.5.4
Diffstat (limited to 'libpng/pngget.c')
-rw-r--r-- | libpng/pngget.c | 140 |
1 files changed, 62 insertions, 78 deletions
diff --git a/libpng/pngget.c b/libpng/pngget.c index f180f3d..a0e90bb 100644 --- a/libpng/pngget.c +++ b/libpng/pngget.c @@ -1,9 +1,9 @@ /* pngget.c - retrieval of values from info struct * - * libpng 1.2.1 - December 12, 2001 + * Last changed in libpng 1.2.15 January 5, 2007 * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2001 Glenn Randers-Pehrson + * Copyright (c) 1998-2007 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.) */ @@ -11,6 +11,8 @@ #define PNG_INTERNAL #include "png.h" +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + png_uint_32 PNGAPI png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag) { @@ -510,8 +512,11 @@ png_get_sPLT(png_structp png_ptr, png_infop info_ptr, png_sPLT_tpp spalettes) { if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) + { *spalettes = info_ptr->splt_palettes; - return ((png_uint_32)info_ptr->splt_palettes_num); + return ((png_uint_32)info_ptr->splt_palettes_num); + } + return (0); } #endif @@ -540,14 +545,15 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr, if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL && bit_depth != NULL && color_type != NULL) { - int pixel_depth, channels; - png_uint_32 rowbytes_per_pixel; - png_debug1(1, "in %s retrieval function\n", "IHDR"); *width = info_ptr->width; *height = info_ptr->height; *bit_depth = info_ptr->bit_depth; + if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16) + png_error(png_ptr, "Invalid bit depth"); *color_type = info_ptr->color_type; + if (info_ptr->color_type > 6) + png_error(png_ptr, "Invalid color type"); if (compression_type != NULL) *compression_type = info_ptr->compression_type; if (filter_type != NULL) @@ -556,17 +562,16 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr, *interlace_type = info_ptr->interlace_type; /* check for potential overflow of rowbytes */ - if (*color_type == PNG_COLOR_TYPE_PALETTE) - channels = 1; - else if (*color_type & PNG_COLOR_MASK_COLOR) - channels = 3; - else - channels = 1; - if (*color_type & PNG_COLOR_MASK_ALPHA) - channels++; - pixel_depth = *bit_depth * channels; - rowbytes_per_pixel = (pixel_depth + 7) >> 3; - if ((*width > PNG_MAX_UINT/rowbytes_per_pixel)) + if (*width == 0 || *width > PNG_UINT_31_MAX) + png_error(png_ptr, "Invalid image width"); + if (*height == 0 || *height > PNG_UINT_31_MAX) + png_error(png_ptr, "Invalid image height"); + if (info_ptr->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 too large for libpng to process image data."); @@ -798,8 +803,11 @@ png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, png_unknown_chunkpp unknowns) { if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) + { *unknowns = info_ptr->unknown_chunks; - return ((png_uint_32)info_ptr->unknown_chunks_num); + return ((png_uint_32)info_ptr->unknown_chunks_num); + } + return (0); } #endif @@ -819,99 +827,75 @@ png_get_user_chunk_ptr(png_structp png_ptr) } #endif - +#ifdef PNG_WRITE_SUPPORTED png_uint_32 PNGAPI png_get_compression_buffer_size(png_structp png_ptr) { return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L); } - +#endif #ifdef PNG_ASSEMBLER_CODE_SUPPORTED -/* this function was added to libpng 1.2.0 and should exist by default*/ +#ifndef PNG_1_0_X +/* this function was added to libpng 1.2.0 and should exist by default */ png_uint_32 PNGAPI png_get_asm_flags (png_structp png_ptr) { - return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L); + /* obsolete, to be removed from libpng-1.4.0 */ + return (png_ptr? 0L: 0L); } /* this function was added to libpng 1.2.0 and should exist by default */ png_uint_32 PNGAPI png_get_asm_flagmask (int flag_select) { - png_uint_32 settable_asm_flags = 0; - - if (flag_select & PNG_SELECT_READ) - settable_asm_flags |= - PNG_ASM_FLAG_MMX_READ_COMBINE_ROW | - PNG_ASM_FLAG_MMX_READ_INTERLACE | - 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 ; - /* no non-MMX flags yet */ - -#if 0 - /* GRR: no write-flags yet, either, but someday... */ - if (flag_select & PNG_SELECT_WRITE) - settable_asm_flags |= - PNG_ASM_FLAG_MMX_WRITE_ [whatever] ; -#endif /* 0 */ - - return settable_asm_flags; /* _theoretically_ settable capabilities only */ + /* obsolete, to be removed from libpng-1.4.0 */ + flag_select=flag_select; + return 0L; } -#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */ - -#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) /* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */ /* this function was added to libpng 1.2.0 */ png_uint_32 PNGAPI png_get_mmx_flagmask (int flag_select, int *compilerID) { - png_uint_32 settable_mmx_flags = 0; - - if (flag_select & PNG_SELECT_READ) - settable_mmx_flags |= - PNG_ASM_FLAG_MMX_READ_COMBINE_ROW | - PNG_ASM_FLAG_MMX_READ_INTERLACE | - 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 ; -#if 0 - /* GRR: no MMX write support yet, but someday... */ - if (flag_select & PNG_SELECT_WRITE) - settable_mmx_flags |= - PNG_ASM_FLAG_MMX_WRITE_ [whatever] ; -#endif /* 0 */ - - if (compilerID != NULL) { -#ifdef PNG_USE_PNGVCRD - *compilerID = 1; /* MSVC */ -#else -#ifdef PNG_USE_PNGGCCRD - *compilerID = 2; /* gcc/gas */ -#else - *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */ -#endif -#endif - } - - return settable_mmx_flags; /* _theoretically_ settable capabilities only */ + /* obsolete, to be removed from libpng-1.4.0 */ + flag_select=flag_select; + *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */ + return 0L; } /* this function was added to libpng 1.2.0 */ png_byte PNGAPI png_get_mmx_bitdepth_threshold (png_structp png_ptr) { - return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0); + /* obsolete, to be removed from libpng-1.4.0 */ + return (png_ptr? 0: 0); } /* this function was added to libpng 1.2.0 */ png_uint_32 PNGAPI png_get_mmx_rowbytes_threshold (png_structp png_ptr) { - return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L); + /* obsolete, to be removed from libpng-1.4.0 */ + return (png_ptr? 0L: 0L); } -#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */ +#endif /* ?PNG_1_0_X */ +#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +/* these functions were added to libpng 1.2.6 */ +png_uint_32 PNGAPI +png_get_user_width_max (png_structp png_ptr) +{ + return (png_ptr? png_ptr->user_width_max : 0); +} +png_uint_32 PNGAPI +png_get_user_height_max (png_structp png_ptr) +{ + return (png_ptr? png_ptr->user_height_max : 0); +} +#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ + + +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |