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| ; pngstruct.inc - header file for PNG reference library |
| |
| ; Last changed in libpng 1.6.24 [August 4, 2016] |
| ; Copyright (c) 1998-2002,2004,2006-2016 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.inc |
| |
| |
| ; The structure that holds the information to read and write PNG files. |
| ; The only people who need to care about what is inside of this are the |
| ; people who will be modifying the library for their own special needs. |
| ; It should NOT be accessed directly by an application. |
| |
| |
| ; zlib.inc defines the structure z_stream, an instance of which is included |
| ; in this structure and is required for decompressing the LZ compressed |
| ; data in PNG files. |
| |
| include '../../../../../../fs/kfar/trunk/zlib/zlib.inc' |
| |
| ; zlib.inc declares a magic type 'uInt' that limits the amount of data that zlib |
| ; can handle at once. This type need be no larger than 16 bits (so maximum of |
| ; 65535), this define allows us to discover how big it is, but limited by the |
| ; maximuum for png_size_t. The value can be overriden in a library build |
| ; (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably |
| ; lower value (e.g. 255 works). A lower value may help memory usage (slightly) |
| ; and may even improve performance on some systems (and degrade it on others.) |
| |
| |
| ZLIB_IO_MAX equ 0xffff ;-1 ;uInt |
| |
| |
| ; The type of a compression buffer list used by the write code. |
| struct png_compression_buffer |
| next dd ? ;struct png_compression_buffer * |
| output db ? ;byte[1] ;actually zbuf_size |
| ends |
| |
| macro PNG_COMPRESSION_BUFFER_SIZE pp |
| { |
| mov eax,png_compression_buffer.output |
| add eax,[pp+png_struct.zbuffer_size] |
| } |
| |
| ; Colorspace support; structures used in png_struct, png_info and in internal |
| ; functions to hold and communicate information about the color space. |
| |
| ; PNG_COLORSPACE_SUPPORTED is only required if the application will perform |
| ; colorspace corrections, otherwise all the colorspace information can be |
| ; skipped and the size of libpng can be reduced (significantly) by compiling |
| ; out the colorspace support. |
| |
| if PNG_COLORSPACE_SUPPORTED eq 1 |
| ; The chromaticities of the red, green and blue colorants and the chromaticity |
| ; of the corresponding white point (i.e. of rgb(1.0,1.0,1.0)). |
| |
| struct png_xy |
| redx dd ? ;png_fixed_point |
| redy dd ? |
| greenx dd ? |
| greeny dd ? |
| bluex dd ? |
| bluey dd ? |
| whitex dd ? |
| whitey dd ? |
| ends |
| |
| ; The same data as above but encoded as CIE XYZ values. When this data comes |
| ; from chromaticities the sum of the Y values is assumed to be 1.0 |
| |
| struct png_XYZ |
| red_X dd ? ;png_fixed_point |
| red_Y dd ? |
| red_Z dd ? |
| green_X dd ? |
| green_Y dd ? |
| green_Z dd ? |
| blue_X dd ? |
| blue_Y dd ? |
| blue_Z dd ? |
| ends |
| end if ;COLORSPACE |
| |
| if (PNG_COLORSPACE_SUPPORTED eq 1) | (PNG_GAMMA_SUPPORTED eq 1) |
| ; A colorspace is all the above plus, potentially, profile information; |
| ; however at present libpng does not use the profile internally so it is only |
| ; stored in the png_info struct (if iCCP is supported.) The rendering intent |
| ; is retained here and is checked. |
| |
| ; The file gamma encoding information is also stored here and gamma correction |
| ; is done by libpng, whereas color correction must currently be done by the |
| ; application. |
| |
| struct png_colorspace |
| if PNG_GAMMA_SUPPORTED eq 1 |
| gamma dd ? ;png_fixed_point ;File gamma |
| end if |
| |
| if PNG_COLORSPACE_SUPPORTED eq 1 |
| end_points_xy png_xy ;End points as chromaticities |
| end_points_XYZ png_XYZ ;End points as CIE XYZ colorant values |
| rendering_intent dw ? ;uint_16 ;Rendering intent of a profile |
| end if |
| |
| ; Flags are always defined to simplify the code. |
| flags dw ? ;uint_16 ;As defined below |
| ends |
| |
| ; General flags for the 'flags' field |
| PNG_COLORSPACE_HAVE_GAMMA equ 0x0001 |
| PNG_COLORSPACE_HAVE_ENDPOINTS equ 0x0002 |
| PNG_COLORSPACE_HAVE_INTENT equ 0x0004 |
| PNG_COLORSPACE_FROM_gAMA equ 0x0008 |
| PNG_COLORSPACE_FROM_cHRM equ 0x0010 |
| PNG_COLORSPACE_FROM_sRGB equ 0x0020 |
| PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB equ 0x0040 |
| PNG_COLORSPACE_MATCHES_sRGB equ 0x0080 ;exact match on profile |
| PNG_COLORSPACE_INVALID equ 0x8000 |
| macro PNG_COLORSPACE_CANCEL flags {(0xffff xor (flags))} |
| end if ;COLORSPACE || GAMMA |
| |
| struct png_struct |
| if PNG_SETJMP_SUPPORTED eq 1 |
| jmp_buf_local dd ? ;jmp_buf ;New name in 1.6.0 for jmp_buf in png_struct |
| longjmp_fn dd ? ;png_longjmp_ptr ;setjmp non-local goto function. |
| jmp_buf_ptr dd ? ;jmp_buf * ;passed to longjmp_fn |
| jmp_buf_size dd ? ;size_t ;size of the above, if allocated |
| end if |
| error_fn dd ? ;png_error_ptr ;function for printing errors and aborting |
| if PNG_WARNINGS_SUPPORTED eq 1 |
| warning_fn dd ? ;png_error_ptr ;function for printing warnings |
| end if |
| error_ptr dd ? ;voidp ;user supplied struct for error functions |
| write_data_fn dd ? ;png_rw_ptr ;function for writing output data |
| read_data_fn dd ? ;png_rw_ptr ;function for reading input data |
| io_ptr dd ? ;voidp ;ptr to application struct for I/O functions |
| |
| if PNG_READ_USER_TRANSFORM_SUPPORTED eq 1 |
| read_user_transform_fn dd ? ;png_user_transform_ptr ;user read transform |
| end if |
| |
| if PNG_WRITE_USER_TRANSFORM_SUPPORTED eq 1 |
| write_user_transform_fn dd ? ;png_user_transform_ptr ; user write transform |
| end if |
| |
| ; These were added in libpng-1.0.2 |
| if PNG_USER_TRANSFORM_PTR_SUPPORTED eq 1 |
| if (PNG_READ_USER_TRANSFORM_SUPPORTED eq 1) | (PNG_WRITE_USER_TRANSFORM_SUPPORTED eq 1) |
| user_transform_ptr dd ? ;voidp ;user supplied struct for user transform |
| user_transform_depth db ? ;byte ;bit depth of user transformed pixels |
| user_transform_channels db ? ;byte ;channels in user transformed pixels |
| end if |
| end if |
| |
| mode dd ? ;uint_32 ;tells us where we are in the PNG file |
| flags dd ? ;uint_32 ;flags indicating various things to libpng |
| transformations dd ? ;uint_32 ;which transformations to perform |
| |
| zowner dd ? ;uint_32 ;ID (chunk type) of zstream owner, 0 if none |
| zstream z_stream ;decompression structure |
| |
| zbuffer_list dd ? ;png_compression_bufferp ;Created on demand during write |
| zbuffer_size dd ? ;uInt ;size of the actual buffer |
| |
| zlib_level dd ? ;int ;holds zlib compression level |
| zlib_method dd ? ;int ;holds zlib compression method |
| zlib_window_bits dd ? ;int ;holds zlib compression window bits |
| zlib_mem_level dd ? ;int ;holds zlib compression memory level |
| zlib_strategy dd ? ;int ;holds zlib compression strategy |
| ; Added at libpng 1.5.4 |
| if PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED eq 1 |
| zlib_text_level dd ? ;int ;holds zlib compression level |
| zlib_text_method dd ? ;int ;holds zlib compression method |
| zlib_text_window_bits dd ? ;int ;holds zlib compression window bits |
| zlib_text_mem_level dd ? ;int ;holds zlib compression memory level |
| zlib_text_strategy dd ? ;int ;holds zlib compression strategy |
| end if |
| ;End of material added at libpng 1.5.4 |
| ;Added at libpng 1.6.0 |
| zlib_set_level dd ? ;int ;Actual values set into the zstream on write |
| zlib_set_method dd ? ;int |
| zlib_set_window_bits dd ? ;int |
| zlib_set_mem_level dd ? ;int |
| zlib_set_strategy dd ? ;int |
| |
| width dd ? ;uint_32 ;width of image in pixels |
| height dd ? ;uint_32 ;height of image in pixels |
| num_rows dd ? ;uint_32 ;number of rows in current pass |
| usr_width dd ? ;uint_32 ;width of row at start of write |
| rowbytes dd ? ;png_size_t ;size of row in bytes |
| iwidth dd ? ;uint_32 ;width of current interlaced row in pixels |
| row_number dd ? ;uint_32 ;current row in interlace pass |
| chunk_name dd ? ;uint_32 ;PNG_CHUNK() id of current chunk |
| prev_row dd ? ;bytep ;buffer to save previous (unfiltered) row. |
| ;While reading this is a pointer into |
| ;big_prev_row; while writing it is separately |
| ;allocated if needed. |
| |
| row_buf dd ? ;bytep ;buffer to save current (unfiltered) row. |
| ;While reading, this is a pointer into |
| ;big_row_buf; while writing it is separately |
| ;allocated. |
| |
| if PNG_WRITE_FILTER_SUPPORTED eq 1 |
| try_row dd ? ;bytep ;buffer to save trial row when filtering |
| tst_row dd ? ;bytep ;buffer to save best trial row when filtering |
| end if |
| info_rowbytes dd ? ;png_size_t ;Added in 1.5.4: cache of updated row bytes |
| |
| idat_size dd ? ;uint_32 ;current IDAT size for read |
| crc dd ? ;uint_32 ;current chunk CRC value |
| palette dd ? ;png_colorp ;palette from the input file |
| num_palette dw ? ;uint_16 ;number of color entries in palette |
| |
| ; Added at libpng-1.5.10 |
| if PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED eq 1 |
| num_palette_max dd ? ;int ;maximum palette index found in IDAT |
| end if |
| |
| num_trans dw ? ;uint_16 ;number of transparency values |
| compression db ? ;byte ;file compression type (always 0) |
| filter db ? ;byte ;file filter type (always 0) |
| interlaced db ? ;byte ;PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 |
| pass db ? ;byte ;current interlace pass (0 - 6) |
| do_filter db ? ;byte ;row filter flags (see PNG_FILTER_ in png.inc) |
| color_type db ? ;byte ;color type of file |
| bit_depth db ? ;byte ;bit depth of file |
| usr_bit_depth db ? ;byte ;bit depth of users row: write only |
| pixel_depth db ? ;byte ;number of bits per pixel |
| channels db ? ;byte ;number of channels in file |
| usr_channels db ? ;byte ;channels at start of write: write only |
| sig_bytes db ? ;byte ;magic bytes read/written from start of file |
| maximum_pixel_depth db ? ;byte ;pixel depth used for the row buffers |
| transformed_pixel_depth db ? ;byte ;pixel depth after read/write transforms |
| ;#if PNG_ZLIB_VERNUM >= 0x1240 |
| zstream_start db ? ;byte ;at start of an input zlib stream |
| ;end if /* Zlib >= 1.2.4 */ |
| if (PNG_READ_FILLER_SUPPORTED eq 1) | (PNG_WRITE_FILLER_SUPPORTED eq 1) |
| filler dw ? ;uint_16 ; filler bytes for pixel expansion |
| end if |
| |
| if (PNG_bKGD_SUPPORTED eq 1) | (PNG_READ_BACKGROUND_SUPPORTED eq 1) | \ |
| (PNG_READ_ALPHA_MODE_SUPPORTED eq 1) |
| background_gamma_type db ? ;byte |
| background_gamma dd ? ;png_fixed_point |
| background png_color_16 ;background color in screen gamma space |
| if PNG_READ_GAMMA_SUPPORTED eq 1 |
| background_1 png_color_16 ;background normalized to gamma 1.0 |
| end if |
| end if ;bKGD |
| |
| if PNG_WRITE_FLUSH_SUPPORTED eq 1 |
| output_flush_fn dd ? ;png_flush_ptr ;Function for flushing output |
| flush_dist dd ? ;uint_32 ;how many rows apart to flush, 0 - no flush |
| flush_rows dd ? ;uint_32 ;number of rows written since last flush |
| end if |
| |
| if PNG_READ_GAMMA_SUPPORTED eq 1 |
| gamma_shift dd ? ;int ;number of "insignificant" bits in 16-bit gamma |
| screen_gamma dd ? ;png_fixed_point ;screen gamma value (display_exponent) |
| |
| gamma_table dd ? ;bytep ;gamma table for 8-bit depth files |
| gamma_16_table dd ? ;uint_16pp ;gamma table for 16-bit depth files |
| if (PNG_READ_BACKGROUND_SUPPORTED eq 1) | \ |
| (PNG_READ_ALPHA_MODE_SUPPORTED eq 1) | \ |
| (PNG_READ_RGB_TO_GRAY_SUPPORTED eq 1) |
| gamma_from_1 dd ? ;bytep ;converts from 1.0 to screen |
| gamma_to_1 dd ? ;bytep ;converts from file to 1.0 |
| gamma_16_from_1 dd ? ;uint_16pp ;converts from 1.0 to screen |
| gamma_16_to_1 dd ? ;uint_16pp ;converts from file to 1.0 |
| end if ;READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY |
| end if |
| |
| if (PNG_READ_GAMMA_SUPPORTED eq 1) | (PNG_sBIT_SUPPORTED eq 1) |
| sig_bit png_color_8 ;significant bits in each available channel |
| end if |
| |
| if (PNG_READ_SHIFT_SUPPORTED eq 1) | (PNG_WRITE_SHIFT_SUPPORTED eq 1) |
| shift png_color_8 ;shift for significant bit tranformation |
| end if |
| |
| if (PNG_tRNS_SUPPORTED eq 1) | (PNG_READ_BACKGROUND_SUPPORTED eq 1) \ |
| | (PNG_READ_EXPAND_SUPPORTED eq 1) | (PNG_READ_BACKGROUND_SUPPORTED eq 1) |
| trans_alpha dd ? ;bytep ;alpha values for paletted files |
| trans_color png_color_16 ;transparent color for non-paletted files |
| end if |
| |
| read_row_fn dd ? ;png_read_status_ptr ;called after each row is decoded |
| write_row_fn dd ? ;png_write_status_ptr ;called after each row is encoded |
| if PNG_PROGRESSIVE_READ_SUPPORTED eq 1 |
| info_fn dd ? ;png_progressive_info_ptr ;called after header data fully read |
| row_fn dd ? ;png_progressive_row_ptr ;called after a prog. row is decoded |
| end_fn dd ? ;png_progressive_end_ptr ;called after image is complete |
| save_buffer_ptr dd ? ;bytep ;current location in save_buffer |
| save_buffer dd ? ;bytep ;buffer for previously read data |
| current_buffer_ptr dd ? ;bytep ;current location in current_buffer |
| current_buffer dd ? ;bytep ;buffer for recently used data |
| push_length dd ? ;uint_32 ;size of current input chunk |
| skip_length dd ? ;uint_32 ;bytes to skip in input data |
| save_buffer_size dd ? ;png_size_t ;amount of data now in save_buffer |
| save_buffer_max dd ? ;png_size_t ;total size of save_buffer |
| buffer_size dd ? ;png_size_t ;total amount of available input data |
| current_buffer_size dd ? ;png_size_t ;amount of data now in current_buffer |
| process_mode dd ? ;int ;what push library is currently doing |
| cur_palette dd ? ;int ;current push library palette index |
| |
| end if ;PROGRESSIVE_READ |
| |
| if PNG_READ_QUANTIZE_SUPPORTED eq 1 |
| palette_lookup dd ? ;bytep ;lookup table for quantizing |
| quantize_index dd ? ;bytep ;index translation for palette files |
| end if |
| |
| ; Options |
| if PNG_SET_OPTION_SUPPORTED eq 1 |
| options db ? ;byte ;On/off state (up to 4 options) |
| end if |
| |
| ;#if PNG_LIBPNG_VER < 10700 |
| ; To do: remove this from libpng-1.7 |
| if PNG_TIME_RFC1123_SUPPORTED eq 1 |
| time_buffer rb 29 ;char[29] ;String to hold RFC 1123 time text |
| end if |
| ;end if |
| |
| ; New members added in libpng-1.0.6 |
| |
| free_me dd ? ;uint_32 ;flags items libpng is responsible for freeing |
| |
| if PNG_USER_CHUNKS_SUPPORTED eq 1 |
| user_chunk_ptr dd ? ;voidp |
| if PNG_READ_USER_CHUNKS_SUPPORTED eq 1 |
| read_user_chunk_fn dd ? ;png_user_chunk_ptr ;user read chunk handler |
| end if |
| end if |
| |
| if PNG_SET_UNKNOWN_CHUNKS_SUPPORTED eq 1 |
| unknown_default dd ? ;int ; As PNG_HANDLE_* |
| num_chunk_list dd ? ;unsigned int ; Number of entries in the list |
| chunk_list dd ? ;bytep ; List of byte[5]; the textual chunk name |
| ; followed by a PNG_HANDLE_* byte |
| end if |
| |
| ; New members added in libpng-1.0.3 |
| if PNG_READ_RGB_TO_GRAY_SUPPORTED eq 1 |
| rgb_to_gray_status db ? ;byte |
| ; Added in libpng 1.5.5 to record setting of coefficients: |
| rgb_to_gray_coefficients_set db ? ;byte |
| ; These were changed from byte in libpng-1.0.6 |
| rgb_to_gray_red_coeff dw ? ;uint_16 |
| rgb_to_gray_green_coeff dw ? ;uint_16 |
| ; deleted in 1.5.5: rgb_to_gray_blue_coeff; |
| end if |
| |
| if PNG_MNG_FEATURES_SUPPORTED eq 1 |
| ; New member added in libpng-1.0.4 (renamed in 1.0.9) |
| ; Changed from byte to uint_32 at version 1.2.0 |
| mng_features_permitted dd ? ;uint_32 |
| |
| ; New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 |
| filter_type db ? ;byte |
| end if |
| |
| ; 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 |
| if PNG_USER_MEM_SUPPORTED eq 1 |
| mem_ptr dd ? ;voidp ;user supplied struct for mem functions |
| malloc_fn dd ? ;malloc_ptr ;function for allocating memory |
| free_fn dd ? ;free_ptr ;function for freeing memory |
| end if |
| |
| ; New member added in libpng-1.0.13 and 1.2.0 |
| big_row_buf dd ? ;bytep ;buffer to save current (unfiltered) row |
| |
| if PNG_READ_QUANTIZE_SUPPORTED eq 1 |
| ; The following three members were added at version 1.0.14 and 1.2.4 |
| quantize_sort dd ? ;bytep ;working sort array |
| index_to_palette dd ? ;bytep ;where the original index currently is in the palette |
| palette_to_index dd ? ;bytep ;which original index points to this palette color |
| end if |
| |
| ; New members added in libpng-1.0.16 and 1.2.6 |
| compression_type db ? ;byte |
| |
| if PNG_USER_LIMITS_SUPPORTED eq 1 |
| user_width_max dd ? ;uint_32 |
| user_height_max dd ? ;uint_32 |
| |
| ; Added in libpng-1.4.0: Total number of sPLT, text, and unknown |
| ; chunks that can be stored (0 means unlimited). |
| |
| user_chunk_cache_max dd ? ;uint_32 |
| |
| ; Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk |
| ; can occupy when decompressed. 0 means unlimited. |
| |
| user_chunk_malloc_max dd ? ;png_alloc_size_t |
| end if |
| |
| ; New member added in libpng-1.0.25 and 1.2.17 |
| if PNG_READ_UNKNOWN_CHUNKS_SUPPORTED eq 1 |
| ; Temporary storage for unknown chunk that the library doesn't recognize, |
| ; used while reading the chunk. |
| |
| ; png_unknown_chunk unknown_chunk; |
| end if |
| |
| ; New member added in libpng-1.2.26 |
| old_big_row_buf_size dd ? ;png_size_t |
| |
| if PNG_READ_SUPPORTED eq 1 |
| ; New member added in libpng-1.2.30 |
| read_buffer dd ? ;bytep ;buffer for reading chunk data |
| read_buffer_size dd ? ;png_alloc_size_t ;current size of the buffer |
| end if |
| if PNG_SEQUENTIAL_READ_SUPPORTED eq 1 |
| IDAT_read_size dd ? ;uInt ;limit on read buffer size for IDAT |
| end if |
| |
| if PNG_IO_STATE_SUPPORTED eq 1 |
| ; New member added in libpng-1.4.0 |
| io_state dd ? ;uint_32 |
| end if |
| |
| ; New member added in libpng-1.5.6 |
| big_prev_row dd ? ;bytep |
| |
| ; New member added in libpng-1.5.7 |
| ; void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info, |
| ; bytep row, bytep prev_row); |
| |
| if PNG_READ_SUPPORTED eq 1 |
| if (PNG_COLORSPACE_SUPPORTED eq 1) | (PNG_GAMMA_SUPPORTED eq 1) |
| colorspace png_colorspace |
| end if |
| end if |
| ends |