diff options
Diffstat (limited to 'Game/Code/lib/PngImage/pngzlib.pas')
| -rw-r--r-- | Game/Code/lib/PngImage/pngzlib.pas | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/Game/Code/lib/PngImage/pngzlib.pas b/Game/Code/lib/PngImage/pngzlib.pas new file mode 100644 index 00000000..3155946a --- /dev/null +++ b/Game/Code/lib/PngImage/pngzlib.pas @@ -0,0 +1,172 @@ +{Portable Network Graphics Delphi ZLIB linking (16 May 2002) }
+
+{This unit links ZLIB to pngimage unit in order to implement }
+{the library. It's now using the new ZLIB version, 1.1.4 }
+{Note: The .obj files must be located in the subdirectory \obj}
+
+unit pngzlib;
+
+{$IFDEF FPC}
+ {$MODE DELPHI}
+{$ENDIF}
+
+interface
+
+type
+
+ TAlloc = function (AppData: Pointer; Items, Size: Integer): Pointer;
+ TFree = procedure (AppData, Block: Pointer);
+
+ // Internal structure. Ignore.
+ TZStreamRec = packed record
+ next_in: PChar; // next input byte
+ avail_in: Integer; // number of bytes available at next_in
+ total_in: Integer; // total nb of input bytes read so far
+
+ next_out: PChar; // next output byte should be put here
+ avail_out: Integer; // remaining free space at next_out
+ total_out: Integer; // total nb of bytes output so far
+
+ msg: PChar; // last error message, NULL if no error
+ internal: Pointer; // not visible by applications
+
+ zalloc: TAlloc; // used to allocate the internal state
+ zfree: TFree; // used to free the internal state
+ AppData: Pointer; // private data object passed to zalloc and zfree
+
+ data_type: Integer; // best guess about the data type: ascii or binary
+ adler: Integer; // adler32 value of the uncompressed data
+ reserved: Integer; // reserved for future use
+ end;
+
+function inflateInit_(var strm: TZStreamRec; version: PChar; recsize: Integer): Integer; // forward;
+function inflate(var strm: TZStreamRec; flush: Integer): Integer; //forward;
+function inflateEnd(var strm: TZStreamRec): Integer; //forward;
+function deflateInit_(var strm: TZStreamRec; level: Integer; version: PChar; recsize: Integer): Integer; //forward;
+function deflate(var strm: TZStreamRec; flush: Integer): Integer; //forward;
+function deflateEnd(var strm: TZStreamRec): Integer; //forward;
+
+const
+ zlib_version = '1.1.4';
+
+function adler32(adler: Integer; buf: PChar; len: Integer): Integer;
+
+
+const
+ Z_NO_FLUSH = 0;
+ Z_PARTIAL_FLUSH = 1;
+ Z_SYNC_FLUSH = 2;
+ Z_FULL_FLUSH = 3;
+ Z_FINISH = 4;
+
+ Z_OK = 0;
+ Z_STREAM_END = 1;
+ Z_NEED_DICT = 2;
+ Z_ERRNO = (-1);
+ Z_STREAM_ERROR = (-2);
+ Z_DATA_ERROR = (-3);
+ Z_MEM_ERROR = (-4);
+ Z_BUF_ERROR = (-5);
+ Z_VERSION_ERROR = (-6);
+
+ Z_NO_COMPRESSION = 0;
+ Z_BEST_SPEED = 1;
+ Z_BEST_COMPRESSION = 9;
+ Z_DEFAULT_COMPRESSION = (-1);
+
+ Z_FILTERED = 1;
+ Z_HUFFMAN_ONLY = 2;
+ Z_DEFAULT_STRATEGY = 0;
+
+ Z_BINARY = 0;
+ Z_ASCII = 1;
+ Z_UNKNOWN = 2;
+
+ Z_DEFLATED = 8;
+
+ _z_errmsg: array[0..9] of PChar = (
+ 'need dictionary', // Z_NEED_DICT (2)
+ 'stream end', // Z_STREAM_END (1)
+ '', // Z_OK (0)
+ 'file error', // Z_ERRNO (-1)
+ 'stream error', // Z_STREAM_ERROR (-2)
+ 'data error', // Z_DATA_ERROR (-3)
+ 'insufficient memory', // Z_MEM_ERROR (-4)
+ 'buffer error', // Z_BUF_ERROR (-5)
+ 'incompatible version', // Z_VERSION_ERROR (-6)
+ ''
+ );
+
+implementation
+
+{$IFNDef FPC}
+ {$L obj\deflate.obj}
+ {$L obj\trees.obj}
+ {$L obj\inflate.obj}
+ {$L obj\inftrees.obj}
+ {$L obj\adler32.obj}
+ {$L obj\infblock.obj}
+ {$L obj\infcodes.obj}
+ {$L obj\infutil.obj}
+ {$L obj\inffast.obj}
+{$ENDIF}
+
+procedure _tr_init; external;
+procedure _tr_tally; external;
+procedure _tr_flush_block; external;
+procedure _tr_align; external;
+procedure _tr_stored_block; external;
+function adler32; external;
+procedure inflate_blocks_new; external;
+procedure inflate_blocks; external;
+procedure inflate_blocks_reset; external;
+procedure inflate_blocks_free; external;
+procedure inflate_set_dictionary; external;
+procedure inflate_trees_bits; external;
+procedure inflate_trees_dynamic; external;
+procedure inflate_trees_fixed; external;
+procedure inflate_codes_new; external;
+procedure inflate_codes; external;
+procedure inflate_codes_free; external;
+procedure _inflate_mask; external;
+procedure inflate_flush; external;
+procedure inflate_fast; external;
+
+procedure _memset(P: Pointer; B: Byte; count: Integer);cdecl;
+begin
+ FillChar(P^, count, B);
+end;
+
+procedure _memcpy(dest, source: Pointer; count: Integer);cdecl;
+begin
+ Move(source^, dest^, count);
+end;
+
+
+// deflate compresses data
+function deflateInit_(var strm: TZStreamRec; level: Integer; version: PChar;
+ recsize: Integer): Integer; external;
+function deflate(var strm: TZStreamRec; flush: Integer): Integer; external;
+function deflateEnd(var strm: TZStreamRec): Integer; external;
+
+// inflate decompresses data
+function inflateInit_(var strm: TZStreamRec; version: PChar; recsize: Integer): Integer; external;
+function inflate(var strm: TZStreamRec; flush: Integer): Integer; external;
+function inflateEnd(var strm: TZStreamRec): Integer; external;
+function inflateReset(var strm: TZStreamRec): Integer; external;
+
+
+function zcalloc(AppData: Pointer; Items, Size: Integer): Pointer;
+begin
+ GetMem(Result, Items*Size);
+end;
+
+procedure zcfree(AppData, Block: Pointer);
+begin
+ FreeMem(Block);
+end;
+
+end.
+
+
+
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