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| #ifndef PNGSTRUCT_H |
| #define PNGSTRUCT_H |
| |
| |
| |
| |
| #ifndef ZLIB_CONST |
| |
| # define ZLIB_CONST |
| #endif |
| #include "zlib.h" |
| #ifdef const |
| |
| # undef const |
| #endif |
| |
| |
| |
| |
| #if ZLIB_VERNUM < 0x1260 |
| # define PNGZ_MSG_CAST(s) png_constcast(char*,s) |
| # define PNGZ_INPUT_CAST(b) png_constcast(png_bytep,b) |
| #else |
| # define PNGZ_MSG_CAST(s) (s) |
| # define PNGZ_INPUT_CAST(b) (b) |
| #endif |
| |
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| |
| #ifndef ZLIB_IO_MAX |
| # define ZLIB_IO_MAX ((uInt)-1) |
| #endif |
| |
| #ifdef PNG_WRITE_SUPPORTED |
| |
| typedef struct png_compression_buffer |
| { |
| struct png_compression_buffer *next; |
| png_byte output[1]; |
| } png_compression_buffer, *png_compression_bufferp; |
| |
| #define PNG_COMPRESSION_BUFFER_SIZE(pp)\ |
| (offsetof(png_compression_buffer, output) + (pp)->zbuffer_size) |
| #endif |
| |
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| |
| #ifdef PNG_COLORSPACE_SUPPORTED |
| |
| |
| |
| typedef struct png_xy |
| { |
| png_fixed_point redx, redy; |
| png_fixed_point greenx, greeny; |
| png_fixed_point bluex, bluey; |
| png_fixed_point whitex, whitey; |
| } png_xy; |
| |
| |
| |
| |
| typedef struct png_XYZ |
| { |
| png_fixed_point red_X, red_Y, red_Z; |
| png_fixed_point green_X, green_Y, green_Z; |
| png_fixed_point blue_X, blue_Y, blue_Z; |
| } png_XYZ; |
| #endif |
| |
| #if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED) |
| |
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| |
| typedef struct png_colorspace |
| { |
| #ifdef PNG_GAMMA_SUPPORTED |
| png_fixed_point gamma; |
| #endif |
| |
| #ifdef PNG_COLORSPACE_SUPPORTED |
| png_xy end_points_xy; |
| png_XYZ end_points_XYZ; |
| png_uint_16 rendering_intent; |
| #endif |
| |
| |
| png_uint_16 flags; |
| } png_colorspace, * PNG_RESTRICT png_colorspacerp; |
| |
| typedef const png_colorspace * PNG_RESTRICT png_const_colorspacerp; |
| |
| |
| #define PNG_COLORSPACE_HAVE_GAMMA 0x0001 |
| #define PNG_COLORSPACE_HAVE_ENDPOINTS 0x0002 |
| #define PNG_COLORSPACE_HAVE_INTENT 0x0004 |
| #define PNG_COLORSPACE_FROM_gAMA 0x0008 |
| #define PNG_COLORSPACE_FROM_cHRM 0x0010 |
| #define PNG_COLORSPACE_FROM_sRGB 0x0020 |
| #define PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB 0x0040 |
| #define PNG_COLORSPACE_MATCHES_sRGB 0x0080 |
| #define PNG_COLORSPACE_INVALID 0x8000 |
| #define PNG_COLORSPACE_CANCEL(flags) (0xffff ^ (flags)) |
| #endif |
| |
| struct png_struct_def |
| { |
| #ifdef PNG_SETJMP_SUPPORTED |
| jmp_buf jmp_buf_local; |
| png_longjmp_ptr longjmp_fn; |
| jmp_buf *jmp_buf_ptr; |
| size_t jmp_buf_size; |
| #endif |
| png_error_ptr error_fn; |
| #ifdef PNG_WARNINGS_SUPPORTED |
| png_error_ptr warning_fn; |
| #endif |
| png_voidp error_ptr; |
| png_rw_ptr write_data_fn; |
| png_rw_ptr read_data_fn; |
| png_voidp io_ptr; |
| |
| #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED |
| png_user_transform_ptr read_user_transform_fn; |
| #endif |
| |
| #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED |
| png_user_transform_ptr write_user_transform_fn; |
| #endif |
| |
| |
| #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED |
| #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
| defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
| png_voidp user_transform_ptr; |
| png_byte user_transform_depth; |
| png_byte user_transform_channels; |
| #endif |
| #endif |
| |
| png_uint_32 mode; |
| png_uint_32 flags; |
| png_uint_32 transformations; |
| |
| png_uint_32 zowner; |
| z_stream zstream; |
| |
| #ifdef PNG_WRITE_SUPPORTED |
| png_compression_bufferp zbuffer_list; |
| uInt zbuffer_size; |
| |
| int zlib_level; |
| int zlib_method; |
| int zlib_window_bits; |
| int zlib_mem_level; |
| int zlib_strategy; |
| #endif |
| |
| #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED |
| int zlib_text_level; |
| int zlib_text_method; |
| int zlib_text_window_bits; |
| int zlib_text_mem_level; |
| int zlib_text_strategy; |
| #endif |
| |
| |
| #ifdef PNG_WRITE_SUPPORTED |
| int zlib_set_level; |
| int zlib_set_method; |
| int zlib_set_window_bits; |
| int zlib_set_mem_level; |
| int zlib_set_strategy; |
| #endif |
| |
| png_uint_32 width; |
| png_uint_32 height; |
| png_uint_32 num_rows; |
| png_uint_32 usr_width; |
| png_size_t rowbytes; |
| png_uint_32 iwidth; |
| png_uint_32 row_number; |
| png_uint_32 chunk_name; |
| png_bytep prev_row; |
| |
| |
| |
| |
| png_bytep row_buf; |
| |
| |
| |
| |
| #ifdef PNG_WRITE_FILTER_SUPPORTED |
| png_bytep try_row; |
| png_bytep tst_row; |
| #endif |
| png_size_t info_rowbytes; |
| |
| png_uint_32 idat_size; |
| png_uint_32 crc; |
| png_colorp palette; |
| png_uint_16 num_palette; |
| |
| |
| #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED |
| int num_palette_max; |
| #endif |
| |
| png_uint_16 num_trans; |
| png_byte compression; |
| png_byte filter; |
| png_byte interlaced; |
| png_byte pass; |
| png_byte do_filter; |
| png_byte color_type; |
| png_byte bit_depth; |
| png_byte usr_bit_depth; |
| png_byte pixel_depth; |
| png_byte channels; |
| #ifdef PNG_WRITE_SUPPORTED |
| png_byte usr_channels; |
| #endif |
| png_byte sig_bytes; |
| png_byte maximum_pixel_depth; |
| |
| png_byte transformed_pixel_depth; |
| |
| #if PNG_ZLIB_VERNUM >= 0x1240 |
| png_byte zstream_start; |
| #endif |
| #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) |
| png_uint_16 filler; |
| #endif |
| |
| #if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ |
| defined(PNG_READ_ALPHA_MODE_SUPPORTED) |
| png_byte background_gamma_type; |
| png_fixed_point background_gamma; |
| png_color_16 background; |
| #ifdef PNG_READ_GAMMA_SUPPORTED |
| png_color_16 background_1; |
| #endif |
| #endif |
| |
| #ifdef PNG_WRITE_FLUSH_SUPPORTED |
| png_flush_ptr output_flush_fn; |
| png_uint_32 flush_dist; |
| png_uint_32 flush_rows; |
| #endif |
| |
| #ifdef PNG_READ_GAMMA_SUPPORTED |
| int gamma_shift; |
| png_fixed_point screen_gamma; |
| |
| png_bytep gamma_table; |
| png_uint_16pp gamma_16_table; |
| #if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ |
| defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ |
| defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) |
| png_bytep gamma_from_1; |
| png_bytep gamma_to_1; |
| png_uint_16pp gamma_16_from_1; |
| png_uint_16pp gamma_16_to_1; |
| #endif |
| #endif |
| |
| #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) |
| png_color_8 sig_bit; |
| #endif |
| |
| #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) |
| png_color_8 shift; |
| #endif |
| |
| #if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ |
| || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) |
| png_bytep trans_alpha; |
| png_color_16 trans_color; |
| #endif |
| |
| png_read_status_ptr read_row_fn; |
| png_write_status_ptr write_row_fn; |
| #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
| png_progressive_info_ptr info_fn; |
| png_progressive_row_ptr row_fn; |
| png_progressive_end_ptr end_fn; |
| png_bytep save_buffer_ptr; |
| png_bytep save_buffer; |
| png_bytep current_buffer_ptr; |
| png_bytep current_buffer; |
| png_uint_32 push_length; |
| png_uint_32 skip_length; |
| png_size_t save_buffer_size; |
| png_size_t save_buffer_max; |
| png_size_t buffer_size; |
| png_size_t current_buffer_size; |
| int process_mode; |
| int cur_palette; |
| |
| #endif |
| |
| #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) |
| |
| png_bytepp offset_table_ptr; |
| png_bytep offset_table; |
| png_uint_16 offset_table_number; |
| png_uint_16 offset_table_count; |
| png_uint_16 offset_table_count_free; |
| #endif |
| |
| #ifdef PNG_READ_QUANTIZE_SUPPORTED |
| png_bytep palette_lookup; |
| png_bytep quantize_index; |
| #endif |
| |
| |
| #ifdef PNG_SET_OPTION_SUPPORTED |
| png_byte options; |
| #endif |
| |
| #if PNG_LIBPNG_VER < 10700 |
| |
| #ifdef PNG_TIME_RFC1123_SUPPORTED |
| char time_buffer[29]; |
| #endif |
| #endif |
| |
| |
| |
| png_uint_32 free_me; |
| |
| #ifdef PNG_USER_CHUNKS_SUPPORTED |
| png_voidp user_chunk_ptr; |
| #ifdef PNG_READ_USER_CHUNKS_SUPPORTED |
| png_user_chunk_ptr read_user_chunk_fn; |
| #endif |
| #endif |
| |
| #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED |
| int unknown_default; |
| unsigned int num_chunk_list; |
| png_bytep chunk_list; |
| |
| #endif |
| |
| |
| #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED |
| png_byte rgb_to_gray_status; |
| |
| png_byte rgb_to_gray_coefficients_set; |
| |
| png_uint_16 rgb_to_gray_red_coeff; |
| png_uint_16 rgb_to_gray_green_coeff; |
| |
| #endif |
| |
| |
| #if defined(PNG_MNG_FEATURES_SUPPORTED) |
| |
| png_uint_32 mng_features_permitted; |
| #endif |
| |
| |
| #ifdef PNG_MNG_FEATURES_SUPPORTED |
| png_byte filter_type; |
| #endif |
| |
| |
| |
| |
| #ifdef PNG_USER_MEM_SUPPORTED |
| png_voidp mem_ptr; |
| png_malloc_ptr malloc_fn; |
| png_free_ptr free_fn; |
| #endif |
| |
| |
| png_bytep big_row_buf; |
| |
| #ifdef PNG_READ_QUANTIZE_SUPPORTED |
| |
| png_bytep quantize_sort; |
| png_bytep index_to_palette; |
| |
| png_bytep palette_to_index; |
| |
| #endif |
| |
| |
| png_byte compression_type; |
| |
| #ifdef PNG_USER_LIMITS_SUPPORTED |
| png_uint_32 user_width_max; |
| png_uint_32 user_height_max; |
| |
| |
| |
| |
| png_uint_32 user_chunk_cache_max; |
| |
| |
| |
| |
| png_alloc_size_t user_chunk_malloc_max; |
| #endif |
| |
| |
| #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED |
| |
| |
| |
| png_unknown_chunk unknown_chunk; |
| #endif |
| |
| |
| png_size_t old_big_row_buf_size; |
| |
| #ifdef PNG_READ_SUPPORTED |
| |
| png_bytep read_buffer; |
| png_alloc_size_t read_buffer_size; |
| #endif |
| #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
| uInt IDAT_read_size; |
| #endif |
| |
| #ifdef PNG_IO_STATE_SUPPORTED |
| |
| png_uint_32 io_state; |
| #endif |
| |
| |
| png_bytep big_prev_row; |
| |
| |
| void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info, |
| png_bytep row, png_const_bytep prev_row); |
| |
| #ifdef PNG_READ_SUPPORTED |
| #if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED) |
| png_colorspace colorspace; |
| #endif |
| #endif |
| }; |
| #endif |