diff options
| author | tobigun <tobigun@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2008-04-06 12:18:01 +0000 |
|---|---|---|
| committer | tobigun <tobigun@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2008-04-06 12:18:01 +0000 |
| commit | 93f69ff9a0c9b05dfbbdcf6f7d737a68fc4d3bd1 (patch) | |
| tree | 2e78e1b8acb099c952ff1c4931dcc0e4d013900d /Game/Code/lib/libpng | |
| parent | b2a824d8f4fcf4d9038e2a360ac586fb0279e739 (diff) | |
| download | usdx-93f69ff9a0c9b05dfbbdcf6f7d737a68fc4d3bd1.tar.gz usdx-93f69ff9a0c9b05dfbbdcf6f7d737a68fc4d3bd1.tar.xz usdx-93f69ff9a0c9b05dfbbdcf6f7d737a68fc4d3bd1.zip | |
- removed (linux incompatible) PngImage. In addition it was rather outdated (from 2003, newest version is from 2006)
- introduced UImage-unit for JPG/PNG/BMP image saving
- the png part uses the libpng12-0.dll (part of SDL_Image) so
- the jpg part uses either Delphi's Jpeg unit or FPC's base/pasjpeg unit
-> so no additional libs are needed.
git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@1007 b956fd51-792f-4845-bead-9b4dfca2ff2c
Diffstat (limited to '')
| -rw-r--r-- | Game/Code/lib/libpng/png.pas | 980 |
1 files changed, 980 insertions, 0 deletions
diff --git a/Game/Code/lib/libpng/png.pas b/Game/Code/lib/libpng/png.pas new file mode 100644 index 00000000..f4424a2a --- /dev/null +++ b/Game/Code/lib/libpng/png.pas @@ -0,0 +1,980 @@ +(*
+ * libpng pascal headers
+ * Version: 1.2.12
+ *)
+
+{$IFDEF FPC}
+ {$ifndef NO_SMART_LINK}
+ {$smartlink on}
+ {$endif}
+{$ENDIF}
+unit png;
+
+interface
+
+{$IFDEF FPC}
+ {$MODE DELPHI}
+ {$PACKRECORDS C}
+{$ENDIF}
+
+uses
+ {$IFDEF MSWINDOWS}
+ Windows,
+ {$ENDIF}
+ {$IFDEF UNIX}
+ baseunix,
+ {$ENDIF}
+ zlib;
+
+const
+{$ifdef MSWINDOWS}
+ // use libpng12-0 (Version 1.2.18), delivered wih SDL_Image
+ LibPng = 'libpng12-0'; // 'libpng13';
+ // matching lib version for libpng13.dll, needed for initialization
+ PNG_LIBPNG_VER_STRING='1.2.12';
+ // define the compiler that was used to built the DLL (necessary for jmp_buf)
+ // SDL_Image was compiled with GCC
+ //{$define MSVC_DLL} // MS Visual C++
+ {$define GCC_DLL} // GCC
+{$else}
+ LibPng = 'png';
+ // matching lib version for libpng, needed for initialization
+ PNG_LIBPNG_VER_STRING='1.2.12';
+{$endif}
+
+
+{$ifdef MSWINDOWS}
+const
+ // JB_LEN (#elements in jmp_buf) depends on the compiler used to compile the DLL
+ // MSVC++: 16 (x86/AMD64), GCC: 52
+ {$if Defined(MSVC_DLL)}
+ JB_LEN = 16;
+ {$elseif Defined(GCC_DLL)}
+ JB_LEN = 52;
+ {$else}
+ JB_LEN = 0;
+ {$ifend}
+{$endif}
+
+type
+ {$IFNDEF FPC}
+ // defines for Delphi
+ size_t = longword;
+ {$ENDIF}
+
+ {$ifdef MSWINDOWS}
+ {$if JB_LEN > 0}
+ jmp_buf = array[0..JB_LEN-1] of integer;
+ // the png_struct cannot be accessed if the size of jmp_buf is unknown
+ {$define UsePngStruct}
+ {$ifend}
+ // Do NOT use time_t on windows! It might be 32 or 64bit, depending on the compiler and system.
+ // MSVS-2005 starts using 64bit for time_t on x86 by default, but GCC uses just 32bit.
+ //time_t = longint;
+ {$endif}
+
+ z_stream = TZStream;
+
+ png_uint_32 = dword;
+ png_int_32 = longint;
+ png_uint_16 = word;
+ png_int_16 = smallint;
+ png_byte = byte;
+ ppng_uint_32 = ^png_uint_32;
+ ppng_int_32 = ^png_int_32;
+ ppng_uint_16 = ^png_uint_16;
+ ppng_int_16 = ^png_int_16;
+ ppng_byte = ^png_byte;
+ pppng_uint_32 = ^ppng_uint_32;
+ pppng_int_32 = ^ppng_int_32;
+ pppng_uint_16 = ^ppng_uint_16;
+ pppng_int_16 = ^ppng_int_16;
+ pppng_byte = ^ppng_byte;
+ png_size_t = size_t;
+ png_fixed_point = png_int_32;
+ ppng_fixed_point = ^png_fixed_point;
+ pppng_fixed_point = ^ppng_fixed_point;
+ png_voidp = pointer;
+ png_bytep = Ppng_byte;
+ ppng_bytep = ^png_bytep;
+ png_uint_32p = Ppng_uint_32;
+ png_int_32p = Ppng_int_32;
+ png_uint_16p = Ppng_uint_16;
+ ppng_uint_16p = ^png_uint_16p;
+ png_int_16p = Ppng_int_16;
+ png_const_charp = {const} Pchar;
+ png_charp = Pchar;
+ ppng_charp = ^png_charp;
+ png_fixed_point_p = Ppng_fixed_point;
+ png_FILE_p = Pointer;
+ png_doublep = Pdouble;
+ png_bytepp = PPpng_byte;
+ png_uint_32pp = PPpng_uint_32;
+ png_int_32pp = PPpng_int_32;
+ png_uint_16pp = PPpng_uint_16;
+ png_int_16pp = PPpng_int_16;
+ png_const_charpp = {const} PPchar;
+ png_charpp = PPchar;
+ ppng_charpp = ^png_charpp;
+ png_fixed_point_pp = PPpng_fixed_point;
+ PPDouble = ^PDouble;
+ png_doublepp = PPdouble;
+ PPPChar = ^PPCHar;
+ png_charppp = PPPchar;
+ Pcharf = Pchar;
+ PPcharf = ^Pcharf;
+ png_zcharp = Pcharf;
+ png_zcharpp = PPcharf;
+ png_zstreamp = Pzstream;
+
+const
+ (* Maximum positive integer used in PNG is (2^31)-1 *)
+ PNG_UINT_31_MAX = (png_uint_32($7fffffff));
+ PNG_UINT_32_MAX = (png_uint_32(-1));
+ PNG_SIZE_MAX = (png_size_t(-1));
+ {$if defined(PNG_1_0_X) or defined (PNG_1_2_X)}
+ (* PNG_MAX_UINT is deprecated; use PNG_UINT_31_MAX instead. *)
+ PNG_MAX_UINT = PNG_UINT_31_MAX;
+ {$ifend}
+
+ (* These describe the color_type field in png_info. *)
+ (* color type masks *)
+ PNG_COLOR_MASK_PALETTE = 1;
+ PNG_COLOR_MASK_COLOR = 2;
+ PNG_COLOR_MASK_ALPHA = 4;
+
+ (* color types. Note that not all combinations are legal *)
+ PNG_COLOR_TYPE_GRAY = 0;
+ PNG_COLOR_TYPE_PALETTE = (PNG_COLOR_MASK_COLOR or PNG_COLOR_MASK_PALETTE);
+ PNG_COLOR_TYPE_RGB = (PNG_COLOR_MASK_COLOR);
+ PNG_COLOR_TYPE_RGB_ALPHA = (PNG_COLOR_MASK_COLOR or PNG_COLOR_MASK_ALPHA);
+ PNG_COLOR_TYPE_GRAY_ALPHA = (PNG_COLOR_MASK_ALPHA);
+ (* aliases *)
+ PNG_COLOR_TYPE_RGBA = PNG_COLOR_TYPE_RGB_ALPHA;
+ PNG_COLOR_TYPE_GA = PNG_COLOR_TYPE_GRAY_ALPHA;
+
+ (* This is for compression type. PNG 1.0-1.2 only define the single type. *)
+ PNG_COMPRESSION_TYPE_BASE = 0; (* Deflate method 8, 32K window *)
+ PNG_COMPRESSION_TYPE_DEFAULT = PNG_COMPRESSION_TYPE_BASE;
+
+ (* This is for filter type. PNG 1.0-1.2 only define the single type. *)
+ PNG_FILTER_TYPE_BASE = 0; (* Single row per-byte filtering *)
+ PNG_INTRAPIXEL_DIFFERENCING = 64; (* Used only in MNG datastreams *)
+ PNG_FILTER_TYPE_DEFAULT = PNG_FILTER_TYPE_BASE;
+
+ (* These are for the interlacing type. These values should NOT be changed. *)
+ PNG_INTERLACE_NONE = 0; (* Non-interlaced image *)
+ PNG_INTERLACE_ADAM7 = 1; (* Adam7 interlacing *)
+ PNG_INTERLACE_LAST = 2; (* Not a valid value *)
+
+ (* These are for the oFFs chunk. These values should NOT be changed. *)
+ PNG_OFFSET_PIXEL = 0; (* Offset in pixels *)
+ PNG_OFFSET_MICROMETER = 1; (* Offset in micrometers (1/10^6 meter) *)
+ PNG_OFFSET_LAST = 2; (* Not a valid value *)
+
+ (* These are for the pCAL chunk. These values should NOT be changed. *)
+ PNG_EQUATION_LINEAR = 0; (* Linear transformation *)
+ PNG_EQUATION_BASE_E = 1; (* Exponential base e transform *)
+ PNG_EQUATION_ARBITRARY = 2; (* Arbitrary base exponential transform *)
+ PNG_EQUATION_HYPERBOLIC = 3; (* Hyperbolic sine transformation *)
+ PNG_EQUATION_LAST = 4; (* Not a valid value *)
+
+ (* These are for the sCAL chunk. These values should NOT be changed. *)
+ PNG_SCALE_UNKNOWN = 0; (* unknown unit (image scale) *)
+ PNG_SCALE_METER = 1; (* meters per pixel *)
+ PNG_SCALE_RADIAN = 2; (* radians per pixel *)
+ PNG_SCALE_LAST = 3; (* Not a valid value *)
+
+ (* These are for the pHYs chunk. These values should NOT be changed. *)
+ PNG_RESOLUTION_UNKNOWN = 0; (* pixels/unknown unit (aspect ratio) *)
+ PNG_RESOLUTION_METER = 1; (* pixels/meter *)
+ PNG_RESOLUTION_LAST = 2; (* Not a valid value *)
+
+ (* These are for the sRGB chunk. These values should NOT be changed. *)
+ PNG_sRGB_INTENT_PERCEPTUAL = 0;
+ PNG_sRGB_INTENT_RELATIVE = 1;
+ PNG_sRGB_INTENT_SATURATION = 2;
+ PNG_sRGB_INTENT_ABSOLUTE = 3;
+ PNG_sRGB_INTENT_LAST = 4; (* Not a valid value *)
+
+ (* This is for text chunks *)
+ PNG_KEYWORD_MAX_LENGTH = 79;
+
+ (* Maximum number of entries in PLTE/sPLT/tRNS arrays *)
+ PNG_MAX_PALETTE_LENGTH = 256;
+
+ (* These determine if an ancillary chunk's data has been successfully read
+ * from the PNG header, or if the application has filled in the corresponding
+ * data in the info_struct to be written into the output file. The values
+ * of the PNG_INFO_<chunk> defines should NOT be changed.
+ *)
+ PNG_INFO_gAMA = $0001;
+ PNG_INFO_sBIT = $0002;
+ PNG_INFO_cHRM = $0004;
+ PNG_INFO_PLTE = $0008;
+ PNG_INFO_tRNS = $0010;
+ PNG_INFO_bKGD = $0020;
+ PNG_INFO_hIST = $0040;
+ PNG_INFO_pHYs = $0080;
+ PNG_INFO_oFFs = $0100;
+ PNG_INFO_tIME = $0200;
+ PNG_INFO_pCAL = $0400;
+ PNG_INFO_sRGB = $0800; (* GR-P, 0.96a *)
+ PNG_INFO_iCCP = $1000; (* ESR, 1.0.6 *)
+ PNG_INFO_sPLT = $2000; (* ESR, 1.0.6 *)
+ PNG_INFO_sCAL = $4000; (* ESR, 1.0.6 *)
+ PNG_INFO_IDAT = $8000; (* ESR, 1.0.6 *)
+
+
+{$IFDEF FPC}
+{$IF Defined(Linux)}
+var
+ png_libpng_ver : array[0..11] of char; cvar; external;
+ png_pass_start : array[0..6] of integer; cvar; external;
+ png_pass_inc : array[0..6] of integer; cvar; external;
+ png_pass_ystart : array[0..6] of integer; cvar; external;
+ png_pass_yinc : array[0..6] of integer; cvar; external;
+ png_pass_mask : array[0..6] of integer; cvar; external;
+ png_pass_dsp_mask : array[0..6] of integer; cvar; external;
+{$ELSEIF Defined(Darwin)}
+var
+ png_libpng_ver : array[0..11] of char; external LibPng name 'png_libpng_ver';
+ png_pass_start : array[0..6] of integer; external LibPng name 'png_pass_start';
+ png_pass_inc : array[0..6] of integer; external LibPng name 'png_pass_inc';
+ png_pass_ystart : array[0..6] of integer; external LibPng name 'png_pass_ystart';
+ png_pass_yinc : array[0..6] of integer; external LibPng name 'png_pass_yinc';
+ png_pass_mask : array[0..6] of integer; external LibPng name 'png_pass_mask';
+ png_pass_dsp_mask : array[0..6] of integer; external LibPng name 'png_pass_dsp_mask';
+{$IFEND}
+{$ENDIF}
+
+type
+ (* Three color definitions. The order of the red, green, and blue, (and the
+ * exact size) is not important, although the size of the fields need to
+ * be png_byte or png_uint_16 (as defined below).
+ *)
+ png_color = record
+ red : png_byte;
+ green : png_byte;
+ blue : png_byte;
+ end;
+ ppng_color = ^png_color;
+ pppng_color = ^ppng_color;
+ png_color_struct = png_color;
+ png_colorp = Ppng_color;
+ ppng_colorp = ^png_colorp;
+ png_colorpp = PPpng_color;
+
+ png_color_16 = record
+ index : png_byte; (* used for palette files *)
+ red : png_uint_16; (* for use in red green blue files *)
+ green : png_uint_16;
+ blue : png_uint_16;
+ gray : png_uint_16; (* for use in grayscale files *)
+ end;
+ ppng_color_16 = ^png_color_16 ;
+ pppng_color_16 = ^ppng_color_16 ;
+ png_color_16_struct = png_color_16;
+ png_color_16p = Ppng_color_16;
+ ppng_color_16p = ^png_color_16p;
+ png_color_16pp = PPpng_color_16;
+
+ png_color_8 = record
+ red : png_byte; (* for use in red green blue files *)
+ green : png_byte;
+ blue : png_byte;
+ gray : png_byte; (* for use in grayscale files *)
+ alpha : png_byte; (* for alpha channel files *)
+ end;
+ ppng_color_8 = ^png_color_8;
+ pppng_color_8 = ^ppng_color_8;
+ png_color_8_struct = png_color_8;
+ png_color_8p = Ppng_color_8;
+ ppng_color_8p = ^png_color_8p;
+ png_color_8pp = PPpng_color_8;
+
+ (*
+ * The following two structures are used for the in-core representation
+ * of sPLT chunks.
+ *)
+ png_sPLT_entry = record
+ red : png_uint_16;
+ green : png_uint_16;
+ blue : png_uint_16;
+ alpha : png_uint_16;
+ frequency : png_uint_16;
+ end;
+ ppng_sPLT_entry = ^png_sPLT_entry;
+ pppng_sPLT_entry = ^ppng_sPLT_entry;
+ png_sPLT_entry_struct = png_sPLT_entry;
+ png_sPLT_entryp = Ppng_sPLT_entry;
+ png_sPLT_entrypp = PPpng_sPLT_entry;
+
+ (* When the depth of the sPLT palette is 8 bits, the color and alpha samples
+ * occupy the LSB of their respective members, and the MSB of each member
+ * is zero-filled. The frequency member always occupies the full 16 bits.
+ *)
+
+ png_sPLT_t = record
+ name : png_charp; (* palette name *)
+ depth : png_byte; (* depth of palette samples *)
+ entries : png_sPLT_entryp; (* palette entries *)
+ nentries : png_int_32; (* number of palette entries *)
+ end;
+ ppng_sPLT_t = ^png_sPLT_t;
+ pppng_sPLT_t = ^ppng_sPLT_t;
+ png_sPLT_struct = png_sPLT_t;
+ png_sPLT_tp = Ppng_sPLT_t;
+ png_sPLT_tpp = PPpng_sPLT_t;
+
+ (* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file,
+ * and whether that contents is compressed or not. The "key" field
+ * points to a regular zero-terminated C string. The "text", "lang", and
+ * "lang_key" fields can be regular C strings, empty strings, or NULL pointers.
+ * However, the * structure returned by png_get_text() will always contain
+ * regular zero-terminated C strings (possibly empty), never NULL pointers,
+ * so they can be safely used in printf() and other string-handling functions.
+ *)
+ png_text = record
+ compression : integer; (* compression value:
+ -1: tEXt, none
+ 0: zTXt, deflate
+ 1: iTXt, none
+ 2: iTXt, deflate *)
+ key : png_charp; (* keyword, 1-79 character description of "text" *)
+ text : png_charp; (* comment, may be an empty string (ie "")
+ or a NULL pointer *)
+ text_length : png_size_t; (* length of the text string *)
+ end;
+ ppng_text = ^png_text;
+ pppng_text = ^ppng_text;
+ png_text_struct = png_text;
+ png_textp = Ppng_text;
+ ppng_textp = ^png_textp;
+ png_textpp = PPpng_text;
+
+ (* png_time is a way to hold the time in an machine independent way.
+ * Two conversions are provided, both from time_t and struct tm. There
+ * is no portable way to convert to either of these structures, as far
+ * as I know. If you know of a portable way, send it to me. As a side
+ * note - PNG has always been Year 2000 compliant!
+ *)
+ png_time = record
+ year : png_uint_16; (* full year, as in, 1995 *)
+ month : png_byte; (* month of year, 1 - 12 *)
+ day : png_byte; (* day of month, 1 - 31 *)
+ hour : png_byte; (* hour of day, 0 - 23 *)
+ minute : png_byte; (* minute of hour, 0 - 59 *)
+ second : png_byte; (* second of minute, 0 - 60 (for leap seconds) *)
+ end;
+ ppng_time = ^png_time;
+ pppng_time = ^ppng_time;
+ png_time_struct = png_time;
+ png_timep = Ppng_time;
+ PPNG_TIMEP = ^PNG_TIMEP;
+ png_timepp = PPpng_time;
+
+const
+ PNG_CHUNK_NAME_LENGTH = 5;
+type
+ (* png_unknown_chunk is a structure to hold queued chunks for which there is
+ * no specific support. The idea is that we can use this to queue
+ * up private chunks for output even though the library doesn't actually
+ * know about their semantics.
+ *)
+ png_unknown_chunk = record
+ name : array[0..PNG_CHUNK_NAME_LENGTH-1] of png_byte;
+ data : Ppng_byte;
+ size : png_size_t;
+
+ (* libpng-using applications should NOT directly modify this byte. *)
+ location : png_byte; (* mode of operation at read time *)
+ end;
+ ppng_unknown_chunk = ^png_unknown_chunk;
+ pppng_unknown_chunk = ^ppng_unknown_chunk;
+ png_unknown_chunk_t = png_unknown_chunk;
+ png_unknown_chunkp = Ppng_unknown_chunk;
+ png_unknown_chunkpp = PPpng_unknown_chunk;
+
+ (* png_info is a structure that holds the information in a PNG file so
+ * that the application can find out the characteristics of the image.
+ * If you are reading the file, this structure will tell you what is
+ * in the PNG file. If you are writing the file, fill in the information
+ * you want to put into the PNG file, then call png_write_info().
+ * The names chosen should be very close to the PNG specification, so
+ * consult that document for information about the meaning of each field.
+ *
+ * With libpng < 0.95, it was only possible to directly set and read the
+ * the values in the png_info_struct, which meant that the contents and
+ * order of the values had to remain fixed. With libpng 0.95 and later,
+ * however, there are now functions that abstract the contents of
+ * png_info_struct from the application, so this makes it easier to use
+ * libpng with dynamic libraries, and even makes it possible to use
+ * libraries that don't have all of the libpng ancillary chunk-handing
+ * functionality.
+ *
+ * In any case, the order of the parameters in png_info_struct should NOT
+ * be changed for as long as possible to keep compatibility with applications
+ * that use the old direct-access method with png_info_struct.
+ *
+ * The following members may have allocated storage attached that should be
+ * cleaned up before the structure is discarded: palette, trans, text,
+ * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
+ * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
+ * are automatically freed when the info structure is deallocated, if they were
+ * allocated internally by libpng. This behavior can be changed by means
+ * of the png_data_freer() function.
+ *
+ * More allocation details: all the chunk-reading functions that
+ * change these members go through the corresponding png_set_*
+ * functions. A function to clear these members is available: see
+ * png_free_data(). The png_set_* functions do not depend on being
+ * able to point info structure members to any of the storage they are
+ * passed (they make their own copies), EXCEPT that the png_set_text
+ * functions use the same storage passed to them in the text_ptr or
+ * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
+ * functions do not make their own copies.
+ *)
+ png_info = record
+ width : png_uint_32; (* width of image in pixels (from IHDR) *)
+ height : png_uint_32; (* height of image in pixels (from IHDR) *)
+ valid : png_uint_32; (* valid chunk data (see PNG_INFO_ below) *)
+ rowbytes : png_uint_32; (* bytes needed to hold an untransformed row *)
+ palette : png_colorp; (* array of color values (valid & PNG_INFO_PLTE) *)
+ num_palette : png_uint_16; (* number of color entries in "palette" (PLTE) *)
+ num_trans : png_uint_16; (* number of transparent palette color (tRNS) *)
+ bit_depth : png_byte; (* 1, 2, 4, 8, or 16 bits/channel (from IHDR) *)
+ color_type : png_byte; (* see PNG_COLOR_TYPE_ below (from IHDR) *)
+ (* The following three should have been named *_method not *_type *)
+ compression_type : png_byte; (* must be PNG_COMPRESSION_TYPE_BASE (IHDR) *)
+ filter_type : png_byte; (* must be PNG_FILTER_TYPE_BASE (from IHDR) *)
+ interlace_type : png_byte; (* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 *)
+
+ (* The following is informational only on read, and not used on writes. *)
+ channels : png_byte; (* number of data channels per pixel (1, 2, 3, 4) *)
+ pixel_depth : png_byte; (* number of bits per pixel *)
+ spare_byte : png_byte; (* to align the data, and for future use *)
+ signature : array[0..7] of png_byte; (* magic bytes read by libpng from start of file *)
+
+ (* The rest of the data is optional. If you are reading, check the
+ * valid field to see if the information in these are valid. If you
+ * are writing, set the valid field to those chunks you want written,
+ * and initialize the appropriate fields below.
+ *)
+
+ gamma : single;
+ srgb_intent : png_byte;
+ num_text : integer;
+ max_text : integer;
+ text : png_textp;
+ mod_time : png_time;
+ sig_bit : png_color_8;
+ trans : png_bytep;
+ trans_values : png_color_16;
+ background : png_color_16;
+ x_offset : png_int_32;
+ y_offset : png_int_32;
+ offset_unit_type : png_byte;
+ x_pixels_per_unit : png_uint_32;
+ y_pixels_per_unit : png_uint_32;
+ phys_unit_type : png_byte;
+ hist : png_uint_16p;
+ x_white : single;
+ y_white : single;
+ x_red : single;
+ y_red : single;
+ x_green : single;
+ y_green : single;
+ x_blue : single;
+ y_blue : single;
+ pcal_purpose : png_charp;
+ pcal_X0 : png_int_32;
+ pcal_X1 : png_int_32;
+ pcal_units : png_charp;
+ pcal_params : png_charpp;
+ pcal_type : png_byte;
+ pcal_nparams : png_byte;
+ free_me : png_uint_32;
+ unknown_chunks : png_unknown_chunkp;
+ unknown_chunks_num : png_size_t;
+ iccp_name : png_charp;
+ iccp_profile : png_charp;
+ iccp_proflen : png_uint_32;
+ iccp_compression : png_byte;
+ splt_palettes : png_sPLT_tp;
+ splt_palettes_num : png_uint_32;
+ scal_unit : png_byte;
+ scal_pixel_width : double;
+ scal_pixel_height : double;
+ scal_s_width : png_charp;
+ scal_s_height : png_charp;
+ row_pointers : png_bytepp;
+ int_gamma : png_fixed_point;
+ int_x_white : png_fixed_point;
+ int_y_white : png_fixed_point;
+ int_x_red : png_fixed_point;
+ int_y_red : png_fixed_point;
+ int_x_green : png_fixed_point;
+ int_y_green : png_fixed_point;
+ int_x_blue : png_fixed_point;
+ int_y_blue : png_fixed_point;
+ end;
+ ppng_info = ^png_info;
+ pppng_info = ^ppng_info;
+ png_info_struct = png_info;
+ png_infop = Ppng_info;
+ png_infopp = PPpng_info;
+
+ (* This is used for the transformation routines, as some of them
+ * change these values for the row. It also should enable using
+ * the routines for other purposes.
+ *)
+ png_row_info = record
+ width : png_uint_32; (* width of row *)
+ rowbytes : png_uint_32; (* number of bytes in row *)
+ color_type : png_byte; (* color type of row *)
+ bit_depth : png_byte; (* bit depth of row *)
+ channels : png_byte; (* number of channels (1, 2, 3, or 4) *)
+ pixel_depth : png_byte; (* bits per pixel (depth * channels) *)
+ end;
+ ppng_row_info = ^png_row_info;
+ pppng_row_info = ^ppng_row_info;
+ png_row_info_struct = png_row_info;
+ png_row_infop = Ppng_row_info;
+ png_row_infopp = PPpng_row_info;
+ png_structp = ^png_struct;
+
+
+ (* These are the function types for the I/O functions and for the functions
+ * that allow the user to override the default I/O functions with his or her
+ * own. The png_error_ptr type should match that of user-supplied warning
+ * and error functions, while the png_rw_ptr type should match that of the
+ * user read/write data functions.
+ *)
+ png_error_ptr = procedure(Arg1 : png_structp; Arg2 : png_const_charp);cdecl;
+ png_rw_ptr = procedure(Arg1 : png_structp; Arg2 : png_bytep; Arg3 : png_size_t);cdecl;
+ png_flush_ptr = procedure (Arg1 : png_structp) ;cdecl;
+ png_read_status_ptr = procedure (Arg1 : png_structp; Arg2 : png_uint_32; Arg3: integer);cdecl;
+ png_write_status_ptr = procedure (Arg1 : png_structp; Arg2:png_uint_32;Arg3 : integer) ;cdecl;
+ png_progressive_info_ptr = procedure (Arg1 : png_structp; Arg2 : png_infop) ;cdecl;
+ png_progressive_end_ptr = procedure (Arg1 : png_structp; Arg2 : png_infop) ;cdecl;
+ png_progressive_row_ptr = procedure (Arg1 : png_structp; Arg2 : png_bytep; Arg3 : png_uint_32; Arg4 : integer) ;cdecl;
+ png_user_transform_ptr = procedure (Arg1 : png_structp; Arg2 : png_row_infop; Arg3 : png_bytep) ;cdecl;
+ png_user_chunk_ptr = function (Arg1 : png_structp; Arg2 : png_unknown_chunkp): integer;cdecl;
+ png_unknown_chunk_ptr = procedure (Arg1 : png_structp);cdecl;
+ png_malloc_ptr = function (Arg1 : png_structp; Arg2 : png_size_t) : png_voidp ;cdecl;
+ png_free_ptr = procedure (Arg1 : png_structp; Arg2 : png_voidp) ; cdecl;
+
+ png_struct_def = record
+ {$ifdef UsePngStruct}
+ jmpbuf : jmp_buf; (* used in png_error *)
+ error_fn : png_error_ptr; (* function for printing errors and aborting *)
+ warning_fn : png_error_ptr; (* function for printing warnings *)
+ error_ptr : png_voidp; (* user supplied struct for error functions *)
+ write_data_fn : png_rw_ptr; (* function for writing output data *)
+ read_data_fn : png_rw_ptr; (* function for reading input data *)
+ io_ptr : png_voidp; (* ptr to application struct for I/O functions *)
+
+ read_user_transform_fn : png_user_transform_ptr; (* user read transform *)
+
+ write_user_transform_fn : png_user_transform_ptr; (* user write transform *)
+
+ (* These were added in libpng-1.0.2 *)
+ user_transform_ptr : png_voidp; (* user supplied struct for user transform *)
+ user_transform_depth : png_byte; (* bit depth of user transformed pixels *)
+ user_transform_channels : png_byte; (* channels in user transformed pixels *)
+
+ mode : png_uint_32; (* tells us where we are in the PNG file *)
+ flags : png_uint_32; (* flags indicating various things to libpng *)
+ transformations : png_uint_32; (* which transformations to perform *)
+
+ zstream : z_stream; (* pointer to decompression structure (below) *)
+ zbuf : png_bytep; (* buffer for zlib *)
+ zbuf_size : png_size_t; (* size of zbuf *)
+ zlib_level : integer; (* holds zlib compression level *)
+ zlib_method : integer; (* holds zlib compression method *)
+ zlib_window_bits : integer; (* holds zlib compression window bits *)
+ zlib_mem_level : integer; (* holds zlib compression memory level *)
+ zlib_strategy : integer; (* holds zlib compression strategy *)
+
+ width : png_uint_32; (* width of image in pixels *)
+ height : png_uint_32; (* height of image in pixels *)
+ num_rows : png_uint_32; (* number of rows in current pass *)
+ usr_width : png_uint_32; (* width of row at start of write *)
+ rowbytes : png_uint_32; (* size of row in bytes *)
+ irowbytes : png_uint_32; (* size of current interlaced row in bytes *)
+ iwidth : png_uint_32; (* width of current interlaced row in pixels *)
+ row_number : png_uint_32; (* current row in interlace pass *)
+ prev_row : png_bytep; (* buffer to save previous (unfiltered) row *)
+ row_buf : png_bytep; (* buffer to save current (unfiltered) row *)
+ sub_row : png_bytep; (* buffer to save "sub" row when filtering *)
+ up_row : png_bytep; (* buffer to save "up" row when filtering *)
+ avg_row : png_bytep; (* buffer to save "avg" row when filtering *)
+ paeth_row : png_bytep; (* buffer to save "Paeth" row when filtering *)
+ row_info : png_row_info; (* used for transformation routines *)
+
+ idat_size : png_uint_32; (* current IDAT size for read *)
+ crc : png_uint_32; (* current chunk CRC value *)
+ palette : png_colorp; (* palette from the input file *)
+ num_palette : png_uint_16; (* number of color entries in palette *)
+ num_trans : png_uint_16; (* number of transparency values *)
+ chunk_name : array[0..4] of png_byte; (* null-terminated name of current chunk *)
+ compression : png_byte; (* file compression type (always 0) *)
+ filter : png_byte; (* file filter type (always 0) *)
+ interlaced : png_byte; (* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 *)
+ pass : png_byte; (* current interlace pass (0 - 6) *)
+ do_filter : png_byte; (* row filter flags (see PNG_FILTER_ below ) *)
+ color_type : png_byte; (* color type of file *)
+ bit_depth : png_byte; (* bit depth of file *)
+ usr_bit_depth : png_byte; (* bit depth of users row *)
+ pixel_depth : png_byte; (* number of bits per pixel *)
+ channels : png_byte; (* number of channels in file *)
+ usr_channels : png_byte; (* channels at start of write *)
+ sig_bytes : png_byte; (* magic bytes read/written from start of file *)
+
+ filler : png_uint_16;
+
+ background_gamma_type : png_byte;
+ background_gamma : single;
+ background : png_color_16;
+ background_1 : png_color_16;
+ output_flush_fn : png_flush_ptr;
+ flush_dist : png_uint_32;
+ flush_rows : png_uint_32;
+ gamma_shift : integer;
+ gamma : single;
+ screen_gamma : single;
+ gamma_table : png_bytep;
+ gamma_from_1 : png_bytep;
+ gamma_to_1 : png_bytep;
+ gamma_16_table : png_uint_16pp;
+ gamma_16_from_1 : png_uint_16pp;
+ gamma_16_to_1 : png_uint_16pp;
+ sig_bit : png_color_8;
+ shift : png_color_8;
+ trans : png_bytep;
+ trans_values : png_color_16;
+ read_row_fn : png_read_status_ptr;
+ write_row_fn : png_write_status_ptr;
+ info_fn : png_progressive_info_ptr;
+ row_fn : png_progressive_row_ptr;
+ end_fn : png_progressive_end_ptr;
+ save_buffer_ptr : png_bytep;
+ save_buffer : png_bytep;
+ current_buffer_ptr : png_bytep;
+ current_buffer : png_bytep;
+ push_length : png_uint_32;
+ skip_length : png_uint_32;
+ save_buffer_size : png_size_t;
+ save_buffer_max : png_size_t;
+ buffer_size : png_size_t;
+ current_buffer_size : png_size_t;
+ process_mode : integer;
+ cur_palette : integer;
+ current_text_size : png_size_t;
+ current_text_left : png_size_t;
+ current_text : png_charp;
+ current_text_ptr : png_charp;
+ palette_lookup : png_bytep;
+ dither_index : png_bytep;
+ hist : png_uint_16p;
+ heuristic_method : png_byte;
+ num_prev_filters : png_byte;
+ prev_filters : png_bytep;
+ filter_weights : png_uint_16p;
+ inv_filter_weights : png_uint_16p;
+ filter_costs : png_uint_16p;
+ inv_filter_costs : png_uint_16p;
+ time_buffer : png_charp;
+ free_me : png_uint_32;
+ user_chunk_ptr : png_voidp;
+ read_user_chunk_fn : png_user_chunk_ptr;
+ num_chunk_list : integer;
+ chunk_list : png_bytep;
+ rgb_to_gray_status : png_byte;
+ rgb_to_gray_red_coeff : png_uint_16;
+ rgb_to_gray_green_coeff : png_uint_16;
+ rgb_to_gray_blue_coeff : png_uint_16;
+ empty_plte_permitted : png_byte;
+ int_gamma : png_fixed_point;
+ {$endif UsePngStruct}
+ end;
+ ppng_struct_def = ^png_struct_def;
+ pppng_struct_def = ^ppng_struct_def;
+ png_struct = png_struct_def;
+ ppng_struct = ^png_struct;
+ pppng_struct = ^ppng_struct;
+
+ version_1_0_8 = png_structp;
+ png_structpp = PPpng_struct;
+
+function png_access_version_number:png_uint_32;cdecl; external LibPng;
+
+procedure png_set_sig_bytes(png_ptr:png_structp; num_bytes:integer);cdecl; external LibPng;
+function png_sig_cmp(sig:png_bytep; start:png_size_t; num_to_check:png_size_t):integer;cdecl; external LibPng;
+function png_check_sig(sig:png_bytep; num:integer):integer;cdecl; external LibPng;
+
+(* Allocate and initialize png_ptr struct for reading, and any other memory. *)
+function png_create_read_struct(user_png_ver:png_const_charp; error_ptr:png_voidp; error_fn:png_error_ptr; warn_fn:png_error_ptr):png_structp;cdecl; external LibPng;
+
+(* Allocate and initialize png_ptr struct for writing, and any other memory *)
+function png_create_write_struct(user_png_ver:png_const_charp; error_ptr:png_voidp; error_fn:png_error_ptr; warn_fn:png_error_ptr):png_structp;cdecl; external LibPng;
+
+function png_get_compression_buffer_size(png_ptr:png_structp):png_uint_32;cdecl; external LibPng;
+procedure png_set_compression_buffer_size(png_ptr:png_structp; size:png_uint_32);cdecl; external LibPng;
+function png_reset_zstream(png_ptr:png_structp):integer;cdecl; external LibPng;
+
+procedure png_write_chunk(png_ptr:png_structp; chunk_name:png_bytep; data:png_bytep; length:png_size_t);cdecl; external LibPng;
+procedure png_write_chunk_start(png_ptr:png_structp; chunk_name:png_bytep; length:png_uint_32);cdecl; external LibPng;
+procedure png_write_chunk_data(png_ptr:png_structp; data:png_bytep; length:png_size_t);cdecl; external LibPng;
+procedure png_write_chunk_end(png_ptr:png_structp);cdecl; external LibPng;
+
+(* Allocate and initialize the info structure *)
+function png_create_info_struct(png_ptr:png_structp):png_infop;cdecl; external LibPng;
+
+(* Initialize the info structure (old interface - DEPRECATED) *)
+procedure png_info_init(info_ptr:png_infop);cdecl; external LibPng;
+
+(* Writes all the PNG information before the image. *)
+procedure png_write_info_before_PLTE(png_ptr:png_structp; info_ptr:png_infop);cdecl; external LibPng;
+procedure png_write_info(png_ptr:png_structp; info_ptr:png_infop);cdecl; external LibPng;
+
+(* read the information before the actual image data. *)
+procedure png_read_info(png_ptr:png_structp; info_ptr:png_infop);cdecl; external LibPng;
+
+function png_convert_to_rfc1123(png_ptr:png_structp; ptime:png_timep):png_charp;cdecl; external LibPng;
+procedure png_convert_from_struct_tm(ptime:png_timep; ttime:Pointer);cdecl; external LibPng;
+{$IFDEF UNIX}
+procedure png_convert_from_time_t(ptime:png_timep; ttime:time_t);cdecl; external LibPng;
+{$ENDIF}
+procedure png_set_expand(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_gray_1_2_4_to_8(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_palette_to_rgb(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_tRNS_to_alpha(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_bgr(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_gray_to_rgb(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_rgb_to_gray(png_ptr:png_structp; error_action:integer; red:double; green:double);cdecl; external LibPng;
+procedure png_set_rgb_to_gray_fixed(png_ptr:png_structp; error_action:integer; red:png_fixed_point; green:png_fixed_point);cdecl; external LibPng;
+function png_get_rgb_to_gray_status(png_ptr:png_structp):png_byte;cdecl; external LibPng;
+procedure png_build_grayscale_palette(bit_depth:integer; palette:png_colorp);cdecl; external LibPng;
+procedure png_set_strip_alpha(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_swap_alpha(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_invert_alpha(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_filler(png_ptr:png_structp; filler:png_uint_32; flags:integer);cdecl; external LibPng;
+procedure png_set_swap(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_packing(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_packswap(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_shift(png_ptr:png_structp; true_bits:png_color_8p);cdecl; external LibPng;
+function png_set_interlace_handling(png_ptr:png_structp):integer;cdecl; external LibPng;
+procedure png_set_invert_mono(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_background(png_ptr:png_structp; background_color:png_color_16p; background_gamma_code:integer; need_expand:integer; background_gamma:double);cdecl; external LibPng;
+procedure png_set_strip_16(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_set_dither(png_ptr:png_structp; palette:png_colorp; num_palette:integer; maximum_colors:integer; histogram:png_uint_16p;
+ full_dither:integer);cdecl; external LibPng;
+procedure png_set_gamma(png_ptr:png_structp; screen_gamma:double; default_file_gamma:double);cdecl; external LibPng;
+procedure png_permit_empty_plte(png_ptr:png_structp; empty_plte_permitted:integer);cdecl; external LibPng;
+procedure png_set_flush(png_ptr:png_structp; nrows:integer);cdecl; external LibPng;
+procedure png_write_flush(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_start_read_image(png_ptr:png_structp);cdecl; external LibPng;
+procedure png_read_update_info(png_ptr:png_structp; info_ptr:png_infop);cdecl; external LibPng;
+
+(* read one or more rows of image data. *)
+procedure png_read_rows(png_ptr:png_structp; row:png_bytepp; display_row:png_bytepp; num_rows:png_uint_32);cdecl; external LibPng;
+
+(* read a row of data. *)
+procedure png_read_row(png_ptr:png_structp; row:png_bytep; display_row:png_bytep);cdecl; external LibPng;
+
+(* read the whole image into memory at once. *)
+procedure png_read_image(png_ptr:png_structp; image:png_bytepp);cdecl; external LibPng;
+
+(* write a row of image data *)
+procedure png_write_row(png_ptr:png_structp; row:png_bytep);cdecl; external LibPng;
+
+(* write a few rows of image data *)
+procedure png_write_rows(png_ptr:png_structp; row:png_bytepp; num_rows:png_uint_32);cdecl; external LibPng;
+
+(* write the image data *)
+procedure png_write_image(png_ptr:png_structp; image:png_bytepp);cdecl; external LibPng;
+
+(* writes the end of the PNG file. *)
+procedure png_write_end(png_ptr:png_structp; info_ptr:png_infop);cdecl; external LibPng;
+
+(* read the end of the PNG file. *)
+procedure png_read_end(png_ptr:png_structp; info_ptr:png_infop);cdecl; external LibPng;
+
+(* free any memory associated with the png_info_struct *)
+procedure png_destroy_info_struct(png_ptr:png_structp; info_ptr_ptr:png_infopp);cdecl; external LibPng;
+
+(* free any memory associated with the png_struct and the png_info_structs *)
+procedure png_destroy_read_struct(png_ptr_ptr:png_structpp; info_ptr_ptr:png_infopp; end_info_ptr_ptr:png_infopp);cdecl; external LibPng;
+
+(* free all memory used by the read (old method - NOT DLL EXPORTED) *)
+procedure png_read_destroy(png_ptr:png_structp; info_ptr:png_infop; end_info_ptr:png_infop);cdecl; external LibPng;
+
+(* free any memory associated with the png_struct and the png_info_structs *)
+procedure png_destroy_write_struct(png_ptr_ptr:png_structpp; info_ptr_ptr:png_infopp);cdecl; external LibPng;
+
+procedure png_write_destroy_info(info_ptr:png_infop);cdecl; external LibPng;
+procedure png_write_destroy(png_ptr:png_structp);cdecl; external LibPng;
+
+procedure png_set_crc_action(png_ptr:png_structp; crit_action:integer; ancil_action:integer);cdecl; external LibPng;
+
+procedure png_set_filter(png_ptr:png_structp; method:integer; filters:integer);cdecl; external LibPng;
+procedure png_set_filter_heuristics(png_ptr:png_structp; heuristic_method:integer; num_weights:integer; filter_weights:png_doublep; filter_costs:png_doublep);cdecl; external LibPng;
+
+procedure png_set_compression_level(png_ptr:png_structp; level:integer);cdecl; external LibPng;
+procedure png_set_compression_mem_level(png_ptr:png_structp; mem_level:integer);cdecl; external LibPng;
+procedure png_set_compression_strategy(png_ptr:png_structp; strategy:integer);cdecl; external LibPng;
+procedure png_set_compression_window_bits(png_ptr:png_structp; window_bits:integer);cdecl; external LibPng;
+procedure png_set_compression_method(png_ptr:png_structp; method:integer);cdecl; external LibPng;
+
+procedure png_init_io(png_ptr:png_structp; fp:png_FILE_p);cdecl; external LibPng;
+
+(* Replace the (error and abort), and warning functions with user
+ * supplied functions. If no messages are to be printed you must still
+ * write and use replacement functions. The replacement error_fn should
+ * still do a longjmp to the last setjmp location if you are using this
+ * method of error handling. If error_fn or warning_fn is NULL, the
+ * default function will be used.
+ *)
+procedure png_set_error_fn(png_ptr:png_structp; error_ptr:png_voidp; error_fn:png_error_ptr; warning_fn:png_error_ptr);cdecl; external LibPng;
+
+(* Return the user pointer associated with the error functions *)
+function png_get_error_ptr(png_ptr:png_structp):png_voidp;cdecl; external LibPng;
+
+(* Replace the default data output functions with a user supplied one(s).
+ * If buffered output is not used, then output_flush_fn can be set to NULL.
+ * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time
+ * output_flush_fn will be ignored (and thus can be NULL).
+ *)
+procedure png_set_write_fn(png_ptr:png_structp; io_ptr:png_voidp; write_data_fn:png_rw_ptr; output_flush_fn:png_flush_ptr);cdecl; external LibPng;
+
+(* Replace the default data input function with a user supplied one. *)
+procedure png_set_read_fn(png_ptr:png_structp; io_ptr:png_voidp; read_data_fn:png_rw_ptr);cdecl; external LibPng;
+
+(* Return the user pointer associated with the I/O functions *)
+function png_get_io_ptr(png_ptr:png_structp):png_voidp;cdecl; external LibPng;
+
+procedure png_set_read_status_fn(png_ptr:png_structp; read_row_fn:png_read_status_ptr);cdecl; external LibPng;
+procedure png_set_write_status_fn(png_ptr:png_structp; write_row_fn:png_write_status_ptr);cdecl; external LibPng;
+procedure png_set_read_user_transform_fn(png_ptr:png_structp; read_user_transform_fn:png_user_transform_ptr);cdecl; external LibPng;
+procedure png_set_write_user_transform_fn(png_ptr:png_structp; write_user_transform_fn:png_user_transform_ptr);cdecl; external LibPng;
+procedure png_set_user_transform_info(png_ptr:png_structp; user_transform_ptr:png_voidp; user_transform_depth:integer; user_transform_channels:integer);cdecl; external LibPng;
+function png_get_user_transform_ptr(png_ptr:png_structp):png_voidp;cdecl; external LibPng;
+procedure png_set_read_user_chunk_fn(png_ptr:png_structp; user_chunk_ptr:png_voidp; read_user_chunk_fn:png_user_chunk_ptr);cdecl; external LibPng;
+function png_get_user_chunk_ptr(png_ptr:png_structp):png_voidp;cdecl; external LibPng;
+procedure png_set_progressive_read_fn(png_ptr:png_structp; progressive_ptr:png_voidp; info_fn:png_progressive_info_ptr; row_fn:png_progressive_row_ptr; end_fn:png_progressive_end_ptr);cdecl; external LibPng;
+function png_get_progressive_ptr(png_ptr:png_structp):png_voidp;cdecl; external LibPng;
+procedure png_process_data(png_ptr:png_structp; info_ptr:png_infop; buffer:png_bytep; buffer_size:png_size_t);cdecl; external LibPng;
+procedure png_progressive_combine_row(png_ptr:png_structp; old_row:png_bytep; new_row:png_bytep);cdecl; external LibPng;
+function png_malloc(png_ptr:png_structp; size:png_uint_32):png_voidp;cdecl; external LibPng;
+procedure png_free(png_ptr:png_structp; ptr:png_voidp);cdecl; external LibPng;
+procedure png_free_data(png_ptr:png_structp; info_ptr:png_infop; free_me:png_uint_32; num:integer);cdecl; external LibPng;
+procedure png_data_freer(png_ptr:png_structp; info_ptr:png_infop; freer:integer; mask:png_uint_32);cdecl; external LibPng;
+function png_memcpy_check(png_ptr:png_structp; s1:png_voidp; s2:png_voidp; size:png_uint_32):png_voidp;cdecl; external LibPng;
+function png_memset_check(png_ptr:png_structp; s1:png_voidp; value:integer; size:png_uint_32):png_voidp;cdecl; external LibPng;
+procedure png_error(png_ptr:png_structp; error:png_const_charp);cdecl; external LibPng;
+procedure png_chunk_error(png_ptr:png_structp; error:png_const_charp);cdecl; external LibPng;
+procedure png_warning(png_ptr:png_structp; message:png_const_charp);cdecl; external LibPng;
+procedure png_chunk_warning(png_ptr:png_structp; message:png_const_charp);cdecl; external LibPng;
+function png_get_valid(png_ptr:png_structp; info_ptr:png_infop; flag:png_uint_32):png_uint_32;cdecl; external LibPng;
+function png_get_rowbytes(png_ptr:png_structp; info_ptr:png_infop):png_uint_32;cdecl; external LibPng;
+function png_get_rows(png_ptr:png_structp; info_ptr:png_infop):png_bytepp;cdecl; external LibPng;
+procedure png_set_rows(png_ptr:png_structp; info_ptr:png_infop; row_pointers:png_bytepp);cdecl; external LibPng;
+function png_get_channels(png_ptr:png_structp; info_ptr:png_infop):png_byte;cdecl; external LibPng;
+function png_get_image_width(png_ptr:png_structp; info_ptr:png_infop):png_uint_32;cdecl; external LibPng;
+function png_get_image_height(png_ptr:png_structp; info_ptr:png_infop):png_uint_32;cdecl; external LibPng;
+function png_get_bit_depth(png_ptr:png_structp; info_ptr:png_infop):png_byte;cdecl; external LibPng;
+function png_get_color_type(png_ptr:png_structp; info_ptr:png_infop):png_byte;cdecl; external LibPng;
+function png_get_filter_type(png_ptr:png_structp; info_ptr:png_infop):png_byte;cdecl; external LibPng;
+function png_get_interlace_type(png_ptr:png_structp; info_ptr:png_infop):png_byte;cdecl; external LibPng;
+function png_get_compression_type(png_ptr:png_structp; info_ptr:png_infop):png_byte;cdecl; external LibPng;
+function png_get_pixels_per_meter(png_ptr:png_structp; info_ptr:png_infop):png_uint_32;cdecl; external LibPng;
+function png_get_x_pixels_per_meter(png_ptr:png_structp; info_ptr:png_infop):png_uint_32;cdecl; external LibPng;
+function png_get_y_pixels_per_meter(png_ptr:png_structp; info_ptr:png_infop):png_uint_32;cdecl; external LibPng;
+function png_get_pixel_aspect_ratio(png_ptr:png_structp; info_ptr:png_infop):single;cdecl; external LibPng;
+function png_get_x_offset_pixels(png_ptr:png_structp; info_ptr:png_infop):png_int_32;cdecl; external LibPng;
+function png_get_y_offset_pixels(png_ptr:png_structp; info_ptr:png_infop):png_int_32;cdecl; external LibPng;
+function png_get_x_offset_microns(png_ptr:png_structp; info_ptr:png_infop):png_int_32;cdecl; external LibPng;
+function png_get_y_offset_microns(png_ptr:png_structp; info_ptr:png_infop):png_int_32;cdecl; external LibPng;
+function png_get_signature(png_ptr:png_structp; info_ptr:png_infop):png_bytep;cdecl; external LibPng;
+
+function png_get_bKGD(png_ptr:png_structp; info_ptr:png_infop; background:Ppng_color_16p):png_uint_32;cdecl; external LibPng;
+procedure png_set_bKGD(png_ptr:png_structp; info_ptr:png_infop; background:png_color_16p);cdecl; external LibPng;
+function png_get_cHRM(png_ptr:png_structp; info_ptr:png_infop; white_x:Pdouble; white_y:Pdouble; red_x:Pdouble;
+ red_y:Pdouble; green_x:Pdouble; green_y:Pdouble; blue_x:Pdouble; blue_y:Pdouble):png_uint_32;cdecl; external LibPng;
+function png_get_cHRM_fixed(png_ptr:png_structp; info_ptr:png_infop; int_white_x:Ppng_fixed_point; int_white_y:Ppng_fixed_point; int_red_x:Ppng_fixed_point;
+ int_red_y:Ppng_fixed_point; int_green_x:Ppng_fixed_point; int_green_y:Ppng_fixed_point; int_blue_x:Ppng_fixed_point; int_blue_y:Ppng_fixed_point):png_uint_32;cdecl; external LibPng;
+procedure png_set_cHRM(png_ptr:png_structp; info_ptr:png_infop; white_x:double; white_y:double; red_x:double;
+ red_y:double; green_x:double; green_y:double; blue_x:double; blue_y:double);cdecl; external LibPng;
+procedure png_set_cHRM_fixed(png_ptr:png_structp; info_ptr:png_infop; int_white_x:png_fixed_point; int_white_y:png_fixed_point; int_red_x:png_fixed_point;
+ int_red_y:png_fixed_point; int_green_x:png_fixed_point; int_green_y:png_fixed_point; int_blue_x:png_fixed_point; int_blue_y:png_fixed_point);cdecl; external LibPng;
+function png_get_gAMA(png_ptr:png_structp; info_ptr:png_infop; file_gamma:Pdouble):png_uint_32;cdecl; external LibPng;
+function png_get_gAMA_fixed(png_ptr:png_structp; info_ptr:png_infop; int_file_gamma:Ppng_fixed_point):png_uint_32;cdecl; external LibPng;
+procedure png_set_gAMA(png_ptr:png_structp; info_ptr:png_infop; file_gamma:double);cdecl; external LibPng;
+procedure png_set_gAMA_fixed(png_ptr:png_structp; info_ptr:png_infop; int_file_gamma:png_fixed_point);cdecl; external LibPng;
+function png_get_hIST(png_ptr:png_structp; info_ptr:png_infop; hist:Ppng_uint_16p):png_uint_32;cdecl; external LibPng;
+procedure png_set_hIST(png_ptr:png_structp; info_ptr:png_infop; hist:png_uint_16p);cdecl; external LibPng;
+function png_get_IHDR(png_ptr:png_structp; info_ptr:png_infop; width:Ppng_uint_32; height:Ppng_uint_32; bit_depth:Pinteger;
+ color_type:Pinteger; interlace_type:Pinteger; compression_type:Pinteger; filter_type:Pinteger):png_uint_32;cdecl; external LibPng;
+procedure png_set_IHDR(png_ptr:png_structp; info_ptr:png_infop; width:png_uint_32; height:png_uint_32; bit_depth:integer;
+ color_type:integer; interlace_type:integer; compression_type:integer; filter_type:integer);cdecl; external LibPng;
+function png_get_oFFs(png_ptr:png_structp; info_ptr:png_infop; offset_x:Ppng_int_32; offset_y:Ppng_int_32; unit_type:Pinteger):png_uint_32;cdecl; external LibPng;
+procedure png_set_oFFs(png_ptr:png_structp; info_ptr:png_infop; offset_x:png_int_32; offset_y:png_int_32; unit_type:integer);cdecl; external LibPng;
+function png_get_pCAL(png_ptr:png_structp; info_ptr:png_infop; purpose:Ppng_charp; X0:Ppng_int_32; X1:Ppng_int_32;
+ atype:Pinteger; nparams:Pinteger; units:Ppng_charp; params:Ppng_charpp):png_uint_32;cdecl; external LibPng;
+procedure png_set_pCAL(png_ptr:png_structp; info_ptr:png_infop; purpose:png_charp; X0:png_int_32; X1:png_int_32;
+ atype:integer; nparams:integer; units:png_charp; params:png_charpp);cdecl; external LibPng;
+function png_get_pHYs(png_ptr:png_structp; info_ptr:png_infop; res_x:Ppng_uint_32; res_y:Ppng_uint_32; unit_type:Pinteger):png_uint_32;cdecl; external LibPng;
+procedure png_set_pHYs(png_ptr:png_structp; info_ptr:png_infop; res_x:png_uint_32; res_y:png_uint_32; unit_type:integer);cdecl; external LibPng;
+function png_get_PLTE(png_ptr:png_structp; info_ptr:png_infop; palette:Ppng_colorp; num_palette:Pinteger):png_uint_32;cdecl; external LibPng;
+procedure png_set_PLTE(png_ptr:png_structp; info_ptr:png_infop; palette:png_colorp; num_palette:integer);cdecl; external LibPng;
+function png_get_sBIT(png_ptr:png_structp; info_ptr:png_infop; sig_bit:Ppng_color_8p):png_uint_32;cdecl; external LibPng;
+procedure png_set_sBIT(png_ptr:png_structp; info_ptr:png_infop; sig_bit:png_color_8p);cdecl; external LibPng;
+function png_get_sRGB(png_ptr:png_structp; info_ptr:png_infop; intent:Pinteger):png_uint_32;cdecl; external LibPng;
+procedure png_set_sRGB(png_ptr:png_structp; info_ptr:png_infop; intent:integer);cdecl; external LibPng;
+procedure png_set_sRGB_gAMA_and_cHRM(png_ptr:png_structp; info_ptr:png_infop; intent:integer);cdecl; external LibPng;
+function png_get_iCCP(png_ptr:png_structp; info_ptr:png_infop; name:png_charpp; compression_type:Pinteger; profile:png_charpp;
+ proflen:Ppng_uint_32):png_uint_32;cdecl; external LibPng;
+procedure png_set_iCCP(png_ptr:png_structp; info_ptr:png_infop; name:png_charp; compression_type:integer; profile:png_charp;
+ proflen:png_uint_32);cdecl; external LibPng;
+function png_get_sPLT(png_ptr:png_structp; info_ptr:png_infop; entries:png_sPLT_tpp):png_uint_32;cdecl; external LibPng;
+procedure png_set_sPLT(png_ptr:png_structp; info_ptr:png_infop; entries:png_sPLT_tp; nentries:integer);cdecl; external LibPng;
+
+(* png_get_text also returns the number of text chunks in *num_text *)
+function png_get_text(png_ptr:png_structp; info_ptr:png_infop; text_ptr:Ppng_textp; num_text:Pinteger):png_uint_32;cdecl; external LibPng;
+
+(*
+ * Note while png_set_text() will accept a structure whose text,
+ * language, and translated keywords are NULL pointers, the structure
+ * returned by png_get_text will always contain regular
+ * zero-terminated C strings. They might be empty strings but
+ * they will never be NULL pointers.
+ *)
+procedure png_set_text(png_ptr:png_structp; info_ptr:png_infop; text_ptr:png_textp; num_text:integer);cdecl; external LibPng;
+
+function png_get_tIME(png_ptr:png_structp; info_ptr:png_infop; mod_time:Ppng_timep):png_uint_32;cdecl; external LibPng;
+procedure png_set_tIME(png_ptr:png_structp; info_ptr:png_infop; mod_time:png_timep);cdecl; external LibPng;
+function png_get_tRNS(png_ptr:png_structp; info_ptr:png_infop; trans:Ppng_bytep; num_trans:Pinteger; trans_values:Ppng_color_16p):png_uint_32;cdecl; external LibPng;
+procedure png_set_tRNS(png_ptr:png_structp; info_ptr:png_infop; trans:png_bytep; num_trans:integer; trans_values:png_color_16p);cdecl; external LibPng;
+function png_get_sCAL(png_ptr:png_structp; info_ptr:png_infop; aunit:Pinteger; width:Pdouble; height:Pdouble):png_uint_32;cdecl; external LibPng;
+procedure png_set_sCAL(png_ptr:png_structp; info_ptr:png_infop; aunit:integer; width:double; height:double);cdecl; external LibPng;
+procedure png_set_sCAL_s(png_ptr:png_structp; info_ptr:png_infop; aunit:integer; swidth:png_charp; sheight:png_charp);cdecl; external LibPng;
+
+procedure png_set_keep_unknown_chunks(png_ptr:png_structp; keep:integer; chunk_list:png_bytep; num_chunks:integer);cdecl; external LibPng;
+procedure png_set_unknown_chunks(png_ptr:png_structp; info_ptr:png_infop; unknowns:png_unknown_chunkp; num_unknowns:integer);cdecl; external LibPng;
+procedure png_set_unknown_chunk_location(png_ptr:png_structp; info_ptr:png_infop; chunk:integer; location:integer);cdecl; external LibPng;
+function png_get_unknown_chunks(png_ptr:png_structp; info_ptr:png_infop; entries:png_unknown_chunkpp):png_uint_32;cdecl; external LibPng;
+
+procedure png_set_invalid(png_ptr:png_structp; info_ptr:png_infop; mask:integer);cdecl; external LibPng;
+
+procedure png_read_png(png_ptr:png_structp; info_ptr:png_infop; transforms:integer; params:png_voidp);cdecl; external LibPng;
+procedure png_write_png(png_ptr:png_structp; info_ptr:png_infop; transforms:integer; params:png_voidp);cdecl; external LibPng;
+
+function png_get_header_ver(png_ptr:png_structp):png_charp;cdecl; external LibPng;
+function png_get_header_version(png_ptr:png_structp):png_charp;cdecl; external LibPng;
+function png_get_libpng_ver(png_ptr:png_structp):png_charp;cdecl; external LibPng;
+
+implementation
+
+end.
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