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src/Source/LibPNG/pngstruct.h  view on Meta::CPAN

   png_uint_16 offset_table_count;
   png_uint_16 offset_table_count_free;
#endif

#ifdef PNG_READ_QUANTIZE_SUPPORTED
   png_bytep palette_lookup; /* lookup table for quantizing */
   png_bytep quantize_index; /* index translation for palette files */
#endif

#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
   png_byte heuristic_method;        /* heuristic for row filter selection */
   png_byte num_prev_filters;        /* number of weights for previous rows */
   png_bytep prev_filters;           /* filter type(s) of previous row(s) */
   png_uint_16p filter_weights;      /* weight(s) for previous line(s) */
   png_uint_16p inv_filter_weights;  /* 1/weight(s) for previous line(s) */
   png_uint_16p filter_costs;        /* relative filter calculation cost */
   png_uint_16p inv_filter_costs;    /* 1/relative filter calculation cost */
#endif

   /* Options */
#ifdef PNG_SET_OPTION_SUPPORTED
   png_byte options;           /* On/off state (up to 4 options) */
#endif

#if PNG_LIBPNG_VER < 10700
/* To do: remove this from libpng-1.7 */
#ifdef PNG_TIME_RFC1123_SUPPORTED
   char time_buffer[29]; /* String to hold RFC 1123 time text */
#endif
#endif

/* New members added in libpng-1.0.6 */

   png_uint_32 free_me;    /* flags items libpng is responsible for freeing */

#ifdef PNG_USER_CHUNKS_SUPPORTED
   png_voidp user_chunk_ptr;
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
   png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
#endif
#endif

#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
   int          unknown_default; /* As PNG_HANDLE_* */
   unsigned int num_chunk_list;  /* Number of entries in the list */
   png_bytep    chunk_list;      /* List of png_byte[5]; the textual chunk name
                                  * followed by a PNG_HANDLE_* byte */
#endif

/* New members added in libpng-1.0.3 */
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
   png_byte rgb_to_gray_status;
   /* Added in libpng 1.5.5 to record setting of coefficients: */
   png_byte rgb_to_gray_coefficients_set;
   /* These were changed from png_byte in libpng-1.0.6 */
   png_uint_16 rgb_to_gray_red_coeff;
   png_uint_16 rgb_to_gray_green_coeff;
   /* deleted in 1.5.5: rgb_to_gray_blue_coeff; */
#endif

/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
#if defined(PNG_MNG_FEATURES_SUPPORTED)
/* Changed from png_byte to png_uint_32 at version 1.2.0 */
   png_uint_32 mng_features_permitted;
#endif

/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
#ifdef PNG_MNG_FEATURES_SUPPORTED
   png_byte filter_type;
#endif

/* New members added in libpng-1.2.0 */

/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
#ifdef PNG_USER_MEM_SUPPORTED
   png_voidp mem_ptr;             /* user supplied struct for mem functions */
   png_malloc_ptr malloc_fn;      /* function for allocating memory */
   png_free_ptr free_fn;          /* function for freeing memory */
#endif

/* New member added in libpng-1.0.13 and 1.2.0 */
   png_bytep big_row_buf;         /* buffer to save current (unfiltered) row */

#ifdef PNG_READ_QUANTIZE_SUPPORTED
/* The following three members were added at version 1.0.14 and 1.2.4 */
   png_bytep quantize_sort;          /* working sort array */
   png_bytep index_to_palette;       /* where the original index currently is
                                        in the palette */
   png_bytep palette_to_index;       /* which original index points to this
                                         palette color */
#endif

/* New members added in libpng-1.0.16 and 1.2.6 */
   png_byte compression_type;

#ifdef PNG_USER_LIMITS_SUPPORTED
   png_uint_32 user_width_max;
   png_uint_32 user_height_max;

   /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
    * chunks that can be stored (0 means unlimited).
    */
   png_uint_32 user_chunk_cache_max;

   /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
    * can occupy when decompressed.  0 means unlimited.
    */
   png_alloc_size_t user_chunk_malloc_max;
#endif

/* New member added in libpng-1.0.25 and 1.2.17 */
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
   /* Temporary storage for unknown chunk that the library doesn't recognize,
    * used while reading the chunk.
    */
   png_unknown_chunk unknown_chunk;
#endif

/* New member added in libpng-1.2.26 */
  png_size_t old_big_row_buf_size;