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-{
- This file is part of the Free Pascal run time library.
- Copyright (c) 2005 by Karoly Balogh
-
- TinyGL/OpenGL initialization unit for MorphOS/PowerPC
-
- Thanks to Michal 'kiero' Wozniak and Mark 'bigfoot' Olsen
- for their help.
-
- See the file COPYING.FPC, included in this distribution,
- for details about the copyright.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-
- **********************************************************************}
-
-{$MODE FPC} { fsck Delphi mode }
-{$INLINE ON}
-unit tinygl;
-
-interface
-
-uses
- exec;
-
-const
- TINYGLNAME : PChar = 'tinygl.library';
-
-var
- TinyGLBase: Pointer;
- tglContext: Pointer;
-
-function InitTinyGLLibrary : boolean;
-
-implementation
-
-function _GLInit: Pointer;
-syscall sysvbase TinyGLBase 640;
-
-procedure _GLClose(gcl: pointer);
-syscall sysvbase TinyGLBase 646;
-
-const
- { Change VERSION and LIBVERSION to proper values }
- VERSION : string[2] = '50';
- LIBVERSION : longword = 50;
-
-var
- tinygl_exit : Pointer;
-
-procedure CloseTinyGLLibrary;
-begin
- ExitProc := tinygl_exit;
- if TinyGLBase <> nil then begin
- if tglContext <> nil then begin
- _GLClose(tglContext);
- tglContext := nil;
- end;
- CloseLibrary(PLibrary(TinyGLBase));
- TinyGLBase := nil;
- end;
-end;
-
-function InitTinyGLLibrary : boolean;
-begin
- TinyGLBase := nil;
- TinyGLBase := OpenLibrary(TINYGLNAME,LIBVERSION);
- if TinyGLBase <> nil then begin
- tinygl_exit := ExitProc;
- ExitProc := @CloseTinyGLLibrary;
- tglContext := _GLInit;
- InitTinyGLLibrary := True;
- end else begin
- InitTinyGLLibrary := False;
- end;
-end;
-
-end.