1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libpng/pngstruct.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,510 @@
1.4 +
1.5 +/* pngstruct.h - header file for PNG reference library
1.6 + *
1.7 + * Copyright (c) 1998-2013 Glenn Randers-Pehrson
1.8 + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
1.9 + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
1.10 + *
1.11 + * Last changed in libpng 1.6.1 [March 28, 2013]
1.12 + *
1.13 + * This code is released under the libpng license.
1.14 + * For conditions of distribution and use, see the disclaimer
1.15 + * and license in png.h
1.16 + */
1.17 +
1.18 +/* The structure that holds the information to read and write PNG files.
1.19 + * The only people who need to care about what is inside of this are the
1.20 + * people who will be modifying the library for their own special needs.
1.21 + * It should NOT be accessed directly by an application.
1.22 + */
1.23 +
1.24 +#ifndef PNGSTRUCT_H
1.25 +#define PNGSTRUCT_H
1.26 +/* zlib.h defines the structure z_stream, an instance of which is included
1.27 + * in this structure and is required for decompressing the LZ compressed
1.28 + * data in PNG files.
1.29 + */
1.30 +#ifndef ZLIB_CONST
1.31 + /* We must ensure that zlib uses 'const' in declarations. */
1.32 +# define ZLIB_CONST
1.33 +#endif
1.34 +#include "zlib.h"
1.35 +#ifdef const
1.36 + /* zlib.h sometimes #defines const to nothing, undo this. */
1.37 +# undef const
1.38 +#endif
1.39 +
1.40 +/* zlib.h has mediocre z_const use before 1.2.6, this stuff is for compatibility
1.41 + * with older builds.
1.42 + */
1.43 +#if ZLIB_VERNUM < 0x1260
1.44 +# define PNGZ_MSG_CAST(s) png_constcast(char*,s)
1.45 +# define PNGZ_INPUT_CAST(b) png_constcast(png_bytep,b)
1.46 +#else
1.47 +# define PNGZ_MSG_CAST(s) (s)
1.48 +# define PNGZ_INPUT_CAST(b) (b)
1.49 +#endif
1.50 +
1.51 +/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib
1.52 + * can handle at once. This type need be no larger than 16 bits (so maximum of
1.53 + * 65535), this define allows us to discover how big it is, but limited by the
1.54 + * maximuum for png_size_t. The value can be overriden in a library build
1.55 + * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably
1.56 + * lower value (e.g. 255 works). A lower value may help memory usage (slightly)
1.57 + * and may even improve performance on some systems (and degrade it on others.)
1.58 + */
1.59 +#ifndef ZLIB_IO_MAX
1.60 +# define ZLIB_IO_MAX ((uInt)-1)
1.61 +#endif
1.62 +
1.63 +#ifdef PNG_WRITE_SUPPORTED
1.64 +/* The type of a compression buffer list used by the write code. */
1.65 +typedef struct png_compression_buffer
1.66 +{
1.67 + struct png_compression_buffer *next;
1.68 + png_byte output[1]; /* actually zbuf_size */
1.69 +} png_compression_buffer, *png_compression_bufferp;
1.70 +
1.71 +#define PNG_COMPRESSION_BUFFER_SIZE(pp)\
1.72 + (offsetof(png_compression_buffer, output) + (pp)->zbuffer_size)
1.73 +#endif
1.74 +
1.75 +/* Colorspace support; structures used in png_struct, png_info and in internal
1.76 + * functions to hold and communicate information about the color space.
1.77 + *
1.78 + * PNG_COLORSPACE_SUPPORTED is only required if the application will perform
1.79 + * colorspace corrections, otherwise all the colorspace information can be
1.80 + * skipped and the size of libpng can be reduced (significantly) by compiling
1.81 + * out the colorspace support.
1.82 + */
1.83 +#ifdef PNG_COLORSPACE_SUPPORTED
1.84 +/* The chromaticities of the red, green and blue colorants and the chromaticity
1.85 + * of the corresponding white point (i.e. of rgb(1.0,1.0,1.0)).
1.86 + */
1.87 +typedef struct png_xy
1.88 +{
1.89 + png_fixed_point redx, redy;
1.90 + png_fixed_point greenx, greeny;
1.91 + png_fixed_point bluex, bluey;
1.92 + png_fixed_point whitex, whitey;
1.93 +} png_xy;
1.94 +
1.95 +/* The same data as above but encoded as CIE XYZ values. When this data comes
1.96 + * from chromaticities the sum of the Y values is assumed to be 1.0
1.97 + */
1.98 +typedef struct png_XYZ
1.99 +{
1.100 + png_fixed_point red_X, red_Y, red_Z;
1.101 + png_fixed_point green_X, green_Y, green_Z;
1.102 + png_fixed_point blue_X, blue_Y, blue_Z;
1.103 +} png_XYZ;
1.104 +#endif /* COLORSPACE */
1.105 +
1.106 +#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
1.107 +/* A colorspace is all the above plus, potentially, profile information,
1.108 + * however at present libpng does not use the profile internally so it is only
1.109 + * stored in the png_info struct (if iCCP is supported.) The rendering intent
1.110 + * is retained here and is checked.
1.111 + *
1.112 + * The file gamma encoding information is also stored here and gamma correction
1.113 + * is done by libpng, whereas color correction must currently be done by the
1.114 + * application.
1.115 + */
1.116 +typedef struct png_colorspace
1.117 +{
1.118 +#ifdef PNG_GAMMA_SUPPORTED
1.119 + png_fixed_point gamma; /* File gamma */
1.120 +#endif
1.121 +
1.122 +#ifdef PNG_COLORSPACE_SUPPORTED
1.123 + png_xy end_points_xy; /* End points as chromaticities */
1.124 + png_XYZ end_points_XYZ; /* End points as CIE XYZ colorant values */
1.125 + png_uint_16 rendering_intent; /* Rendering intent of a profile */
1.126 +#endif
1.127 +
1.128 + /* Flags are always defined to simplify the code. */
1.129 + png_uint_16 flags; /* As defined below */
1.130 +} png_colorspace, * PNG_RESTRICT png_colorspacerp;
1.131 +
1.132 +typedef const png_colorspace * PNG_RESTRICT png_const_colorspacerp;
1.133 +
1.134 +/* General flags for the 'flags' field */
1.135 +#define PNG_COLORSPACE_HAVE_GAMMA 0x0001
1.136 +#define PNG_COLORSPACE_HAVE_ENDPOINTS 0x0002
1.137 +#define PNG_COLORSPACE_HAVE_INTENT 0x0004
1.138 +#define PNG_COLORSPACE_FROM_gAMA 0x0008
1.139 +#define PNG_COLORSPACE_FROM_cHRM 0x0010
1.140 +#define PNG_COLORSPACE_FROM_sRGB 0x0020
1.141 +#define PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB 0x0040
1.142 +#define PNG_COLORSPACE_MATCHES_sRGB 0x0080 /* exact match on profile */
1.143 +#define PNG_COLORSPACE_INVALID 0x8000
1.144 +#define PNG_COLORSPACE_CANCEL(flags) (0xffff ^ (flags))
1.145 +#endif /* COLORSPACE || GAMMA */
1.146 +
1.147 +struct png_struct_def
1.148 +{
1.149 +#ifdef PNG_SETJMP_SUPPORTED
1.150 + jmp_buf jmp_buf_local; /* New name in 1.6.0 for jmp_buf in png_struct */
1.151 + png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */
1.152 + jmp_buf *jmp_buf_ptr; /* passed to longjmp_fn */
1.153 + size_t jmp_buf_size; /* size of the above, if allocated */
1.154 +#endif
1.155 + png_error_ptr error_fn; /* function for printing errors and aborting */
1.156 +#ifdef PNG_WARNINGS_SUPPORTED
1.157 + png_error_ptr warning_fn; /* function for printing warnings */
1.158 +#endif
1.159 + png_voidp error_ptr; /* user supplied struct for error functions */
1.160 + png_rw_ptr write_data_fn; /* function for writing output data */
1.161 + png_rw_ptr read_data_fn; /* function for reading input data */
1.162 + png_voidp io_ptr; /* ptr to application struct for I/O functions */
1.163 +
1.164 +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1.165 + png_user_transform_ptr read_user_transform_fn; /* user read transform */
1.166 +#endif
1.167 +
1.168 +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1.169 + png_user_transform_ptr write_user_transform_fn; /* user write transform */
1.170 +#endif
1.171 +
1.172 +/* These were added in libpng-1.0.2 */
1.173 +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
1.174 +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
1.175 + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
1.176 + png_voidp user_transform_ptr; /* user supplied struct for user transform */
1.177 + png_byte user_transform_depth; /* bit depth of user transformed pixels */
1.178 + png_byte user_transform_channels; /* channels in user transformed pixels */
1.179 +#endif
1.180 +#endif
1.181 +
1.182 + png_uint_32 mode; /* tells us where we are in the PNG file */
1.183 + png_uint_32 flags; /* flags indicating various things to libpng */
1.184 + png_uint_32 transformations; /* which transformations to perform */
1.185 +
1.186 + png_uint_32 zowner; /* ID (chunk type) of zstream owner, 0 if none */
1.187 + z_stream zstream; /* decompression structure */
1.188 +
1.189 +#ifdef PNG_WRITE_SUPPORTED
1.190 + png_compression_bufferp zbuffer_list; /* Created on demand during write */
1.191 + uInt zbuffer_size; /* size of the actual buffer */
1.192 +
1.193 + int zlib_level; /* holds zlib compression level */
1.194 + int zlib_method; /* holds zlib compression method */
1.195 + int zlib_window_bits; /* holds zlib compression window bits */
1.196 + int zlib_mem_level; /* holds zlib compression memory level */
1.197 + int zlib_strategy; /* holds zlib compression strategy */
1.198 +#endif
1.199 +/* Added at libpng 1.5.4 */
1.200 +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1.201 + int zlib_text_level; /* holds zlib compression level */
1.202 + int zlib_text_method; /* holds zlib compression method */
1.203 + int zlib_text_window_bits; /* holds zlib compression window bits */
1.204 + int zlib_text_mem_level; /* holds zlib compression memory level */
1.205 + int zlib_text_strategy; /* holds zlib compression strategy */
1.206 +#endif
1.207 +/* End of material added at libpng 1.5.4 */
1.208 +/* Added at libpng 1.6.0 */
1.209 +#ifdef PNG_WRITE_SUPPORTED
1.210 + int zlib_set_level; /* Actual values set into the zstream on write */
1.211 + int zlib_set_method;
1.212 + int zlib_set_window_bits;
1.213 + int zlib_set_mem_level;
1.214 + int zlib_set_strategy;
1.215 +#endif
1.216 +
1.217 + png_uint_32 width; /* width of image in pixels */
1.218 + png_uint_32 height; /* height of image in pixels */
1.219 + png_uint_32 num_rows; /* number of rows in current pass */
1.220 + png_uint_32 usr_width; /* width of row at start of write */
1.221 + png_size_t rowbytes; /* size of row in bytes */
1.222 + png_uint_32 iwidth; /* width of current interlaced row in pixels */
1.223 + png_uint_32 row_number; /* current row in interlace pass */
1.224 + png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */
1.225 + png_bytep prev_row; /* buffer to save previous (unfiltered) row.
1.226 + * This is a pointer into big_prev_row
1.227 + */
1.228 + png_bytep row_buf; /* buffer to save current (unfiltered) row.
1.229 + * This is a pointer into big_row_buf
1.230 + */
1.231 +#ifdef PNG_WRITE_SUPPORTED
1.232 + png_bytep sub_row; /* buffer to save "sub" row when filtering */
1.233 + png_bytep up_row; /* buffer to save "up" row when filtering */
1.234 + png_bytep avg_row; /* buffer to save "avg" row when filtering */
1.235 + png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
1.236 +#endif
1.237 + png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */
1.238 +
1.239 + png_uint_32 idat_size; /* current IDAT size for read */
1.240 + png_uint_32 crc; /* current chunk CRC value */
1.241 + png_colorp palette; /* palette from the input file */
1.242 + png_uint_16 num_palette; /* number of color entries in palette */
1.243 +
1.244 +/* Added at libpng-1.5.10 */
1.245 +#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
1.246 + int num_palette_max; /* maximum palette index found in IDAT */
1.247 +#endif
1.248 +
1.249 + png_uint_16 num_trans; /* number of transparency values */
1.250 + png_byte compression; /* file compression type (always 0) */
1.251 + png_byte filter; /* file filter type (always 0) */
1.252 + png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
1.253 + png_byte pass; /* current interlace pass (0 - 6) */
1.254 + png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
1.255 + png_byte color_type; /* color type of file */
1.256 + png_byte bit_depth; /* bit depth of file */
1.257 + png_byte usr_bit_depth; /* bit depth of users row: write only */
1.258 + png_byte pixel_depth; /* number of bits per pixel */
1.259 + png_byte channels; /* number of channels in file */
1.260 +#ifdef PNG_WRITE_SUPPORTED
1.261 + png_byte usr_channels; /* channels at start of write: write only */
1.262 +#endif
1.263 + png_byte sig_bytes; /* magic bytes read/written from start of file */
1.264 + png_byte maximum_pixel_depth;
1.265 + /* pixel depth used for the row buffers */
1.266 + png_byte transformed_pixel_depth;
1.267 + /* pixel depth after read/write transforms */
1.268 +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
1.269 + png_uint_16 filler; /* filler bytes for pixel expansion */
1.270 +#endif
1.271 +
1.272 +#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
1.273 + defined(PNG_READ_ALPHA_MODE_SUPPORTED)
1.274 + png_byte background_gamma_type;
1.275 + png_fixed_point background_gamma;
1.276 + png_color_16 background; /* background color in screen gamma space */
1.277 +#ifdef PNG_READ_GAMMA_SUPPORTED
1.278 + png_color_16 background_1; /* background normalized to gamma 1.0 */
1.279 +#endif
1.280 +#endif /* PNG_bKGD_SUPPORTED */
1.281 +
1.282 +#ifdef PNG_WRITE_FLUSH_SUPPORTED
1.283 + png_flush_ptr output_flush_fn; /* Function for flushing output */
1.284 + png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
1.285 + png_uint_32 flush_rows; /* number of rows written since last flush */
1.286 +#endif
1.287 +
1.288 +#ifdef PNG_READ_GAMMA_SUPPORTED
1.289 + int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
1.290 + png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
1.291 +
1.292 + png_bytep gamma_table; /* gamma table for 8-bit depth files */
1.293 + png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
1.294 +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
1.295 + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
1.296 + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
1.297 + png_bytep gamma_from_1; /* converts from 1.0 to screen */
1.298 + png_bytep gamma_to_1; /* converts from file to 1.0 */
1.299 + png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
1.300 + png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
1.301 +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
1.302 +#endif
1.303 +
1.304 +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
1.305 + png_color_8 sig_bit; /* significant bits in each available channel */
1.306 +#endif
1.307 +
1.308 +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
1.309 + png_color_8 shift; /* shift for significant bit tranformation */
1.310 +#endif
1.311 +
1.312 +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
1.313 + || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
1.314 + png_bytep trans_alpha; /* alpha values for paletted files */
1.315 + png_color_16 trans_color; /* transparent color for non-paletted files */
1.316 +#endif
1.317 +
1.318 + png_read_status_ptr read_row_fn; /* called after each row is decoded */
1.319 + png_write_status_ptr write_row_fn; /* called after each row is encoded */
1.320 +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
1.321 + png_progressive_info_ptr info_fn; /* called after header data fully read */
1.322 + png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */
1.323 + png_progressive_end_ptr end_fn; /* called after image is complete */
1.324 + png_bytep save_buffer_ptr; /* current location in save_buffer */
1.325 + png_bytep save_buffer; /* buffer for previously read data */
1.326 + png_bytep current_buffer_ptr; /* current location in current_buffer */
1.327 + png_bytep current_buffer; /* buffer for recently used data */
1.328 + png_uint_32 push_length; /* size of current input chunk */
1.329 + png_uint_32 skip_length; /* bytes to skip in input data */
1.330 + png_size_t save_buffer_size; /* amount of data now in save_buffer */
1.331 + png_size_t save_buffer_max; /* total size of save_buffer */
1.332 + png_size_t buffer_size; /* total amount of available input data */
1.333 + png_size_t current_buffer_size; /* amount of data now in current_buffer */
1.334 + int process_mode; /* what push library is currently doing */
1.335 + int cur_palette; /* current push library palette index */
1.336 +
1.337 +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
1.338 +
1.339 +#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
1.340 +/* For the Borland special 64K segment handler */
1.341 + png_bytepp offset_table_ptr;
1.342 + png_bytep offset_table;
1.343 + png_uint_16 offset_table_number;
1.344 + png_uint_16 offset_table_count;
1.345 + png_uint_16 offset_table_count_free;
1.346 +#endif
1.347 +
1.348 +#ifdef PNG_READ_QUANTIZE_SUPPORTED
1.349 + png_bytep palette_lookup; /* lookup table for quantizing */
1.350 + png_bytep quantize_index; /* index translation for palette files */
1.351 +#endif
1.352 +
1.353 +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
1.354 + png_byte heuristic_method; /* heuristic for row filter selection */
1.355 + png_byte num_prev_filters; /* number of weights for previous rows */
1.356 + png_bytep prev_filters; /* filter type(s) of previous row(s) */
1.357 + png_uint_16p filter_weights; /* weight(s) for previous line(s) */
1.358 + png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
1.359 + png_uint_16p filter_costs; /* relative filter calculation cost */
1.360 + png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
1.361 +#endif
1.362 +
1.363 + /* Options */
1.364 +#ifdef PNG_SET_OPTION_SUPPORTED
1.365 + png_byte options; /* On/off state (up to 4 options) */
1.366 +#endif
1.367 +
1.368 +#if PNG_LIBPNG_VER < 10700
1.369 +/* To do: remove this from libpng-1.7 */
1.370 +#ifdef PNG_TIME_RFC1123_SUPPORTED
1.371 + char time_buffer[29]; /* String to hold RFC 1123 time text */
1.372 +#endif
1.373 +#endif
1.374 +
1.375 +/* New members added in libpng-1.0.6 */
1.376 +
1.377 + png_uint_32 free_me; /* flags items libpng is responsible for freeing */
1.378 +
1.379 +#ifdef PNG_USER_CHUNKS_SUPPORTED
1.380 + png_voidp user_chunk_ptr;
1.381 +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1.382 + png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
1.383 +#endif
1.384 +#endif
1.385 +
1.386 +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1.387 + int unknown_default; /* As PNG_HANDLE_* */
1.388 + unsigned int num_chunk_list; /* Number of entries in the list */
1.389 + png_bytep chunk_list; /* List of png_byte[5]; the textual chunk name
1.390 + * followed by a PNG_HANDLE_* byte */
1.391 +#endif
1.392 +
1.393 +/* New members added in libpng-1.0.3 */
1.394 +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
1.395 + png_byte rgb_to_gray_status;
1.396 + /* Added in libpng 1.5.5 to record setting of coefficients: */
1.397 + png_byte rgb_to_gray_coefficients_set;
1.398 + /* These were changed from png_byte in libpng-1.0.6 */
1.399 + png_uint_16 rgb_to_gray_red_coeff;
1.400 + png_uint_16 rgb_to_gray_green_coeff;
1.401 + /* deleted in 1.5.5: rgb_to_gray_blue_coeff; */
1.402 +#endif
1.403 +
1.404 +/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
1.405 +#if defined(PNG_MNG_FEATURES_SUPPORTED)
1.406 +/* Changed from png_byte to png_uint_32 at version 1.2.0 */
1.407 + png_uint_32 mng_features_permitted;
1.408 +#endif
1.409 +
1.410 +/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
1.411 +#ifdef PNG_MNG_FEATURES_SUPPORTED
1.412 + png_byte filter_type;
1.413 +#endif
1.414 +
1.415 +#ifdef PNG_APNG_SUPPORTED
1.416 + png_uint_32 apng_flags;
1.417 + png_uint_32 next_seq_num; /* next fcTL/fdAT chunk sequence number */
1.418 + png_uint_32 first_frame_width;
1.419 + png_uint_32 first_frame_height;
1.420 +
1.421 +#ifdef PNG_READ_APNG_SUPPORTED
1.422 + png_uint_32 num_frames_read; /* incremented after all image data of */
1.423 + /* a frame is read */
1.424 +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
1.425 + png_progressive_frame_ptr frame_info_fn; /* frame info read callback */
1.426 + png_progressive_frame_ptr frame_end_fn; /* frame data read callback */
1.427 +#endif
1.428 +#endif
1.429 +
1.430 +#ifdef PNG_WRITE_APNG_SUPPORTED
1.431 + png_uint_32 num_frames_to_write;
1.432 + png_uint_32 num_frames_written;
1.433 +#endif
1.434 +#endif /* PNG_APNG_SUPPORTED */
1.435 +
1.436 +/* New members added in libpng-1.2.0 */
1.437 +
1.438 +/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
1.439 +#ifdef PNG_USER_MEM_SUPPORTED
1.440 + png_voidp mem_ptr; /* user supplied struct for mem functions */
1.441 + png_malloc_ptr malloc_fn; /* function for allocating memory */
1.442 + png_free_ptr free_fn; /* function for freeing memory */
1.443 +#endif
1.444 +
1.445 +/* New member added in libpng-1.0.13 and 1.2.0 */
1.446 + png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
1.447 +
1.448 +#ifdef PNG_READ_QUANTIZE_SUPPORTED
1.449 +/* The following three members were added at version 1.0.14 and 1.2.4 */
1.450 + png_bytep quantize_sort; /* working sort array */
1.451 + png_bytep index_to_palette; /* where the original index currently is
1.452 + in the palette */
1.453 + png_bytep palette_to_index; /* which original index points to this
1.454 + palette color */
1.455 +#endif
1.456 +
1.457 +/* New members added in libpng-1.0.16 and 1.2.6 */
1.458 + png_byte compression_type;
1.459 +
1.460 +#ifdef PNG_USER_LIMITS_SUPPORTED
1.461 + png_uint_32 user_width_max;
1.462 + png_uint_32 user_height_max;
1.463 +
1.464 + /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
1.465 + * chunks that can be stored (0 means unlimited).
1.466 + */
1.467 + png_uint_32 user_chunk_cache_max;
1.468 +
1.469 + /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
1.470 + * can occupy when decompressed. 0 means unlimited.
1.471 + */
1.472 + png_alloc_size_t user_chunk_malloc_max;
1.473 +#endif
1.474 +
1.475 +/* New member added in libpng-1.0.25 and 1.2.17 */
1.476 +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1.477 + /* Temporary storage for unknown chunk that the library doesn't recognize,
1.478 + * used while reading the chunk.
1.479 + */
1.480 + png_unknown_chunk unknown_chunk;
1.481 +#endif
1.482 +
1.483 +/* New member added in libpng-1.2.26 */
1.484 + png_size_t old_big_row_buf_size;
1.485 +
1.486 +#ifdef PNG_READ_SUPPORTED
1.487 +/* New member added in libpng-1.2.30 */
1.488 + png_bytep read_buffer; /* buffer for reading chunk data */
1.489 + png_alloc_size_t read_buffer_size; /* current size of the buffer */
1.490 +#endif
1.491 +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
1.492 + uInt IDAT_read_size; /* limit on read buffer size for IDAT */
1.493 +#endif
1.494 +
1.495 +#ifdef PNG_IO_STATE_SUPPORTED
1.496 +/* New member added in libpng-1.4.0 */
1.497 + png_uint_32 io_state;
1.498 +#endif
1.499 +
1.500 +/* New member added in libpng-1.5.6 */
1.501 + png_bytep big_prev_row;
1.502 +
1.503 +/* New member added in libpng-1.5.7 */
1.504 + void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
1.505 + png_bytep row, png_const_bytep prev_row);
1.506 +
1.507 +#ifdef PNG_READ_SUPPORTED
1.508 +#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
1.509 + png_colorspace colorspace;
1.510 +#endif
1.511 +#endif
1.512 +};
1.513 +#endif /* PNGSTRUCT_H */
