{ $Id$ Translation of the Mesa GLX headers for FreePascal Copyright (C) 1999 Sebastian Guenther Mesa 3-D graphics library Version: 3.0 Copyright (C) 1995-1998 Brian Paul This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. } {$MODE delphi} // objfpc would not work because of direct proc var assignments {You have to enable Macros (compiler switch "-Sm") for compiling this unit! This is necessary for supporting different platforms with different calling conventions via a single unit.} unit GLX; interface {$MACRO ON} {$IFDEF Linux} uses X, XLib, XUtil; {$DEFINE HasGLX} // Activate GLX stuff {$ELSE} {$MESSAGE Unsupported platform.} {$ENDIF} {$IFNDEF HasGLX} {$MESSAGE GLX not present on this platform.} {$ENDIF} // ======================================================= // Unit specific extensions // ======================================================= // Note: Requires that the GL library has already been initialized function InitGLX: Boolean; var GLXDumpUnresolvedFunctions, GLXInitialized: Boolean; // ======================================================= // GLX consts, types and functions // ======================================================= %GLXDeclsIF var %GLXProcsPD // ======================================================= // // ======================================================= implementation {$LINKLIB m} function dlopen(AFile: PChar; mode: LongInt): Pointer; external 'dl'; function dlclose(handle: Pointer): LongInt; external 'dl'; function dlsym(handle: Pointer; name: PChar): Pointer; external 'dl'; function LoadLibrary(name: PChar): Pointer; begin Result := dlopen(name, $101 {RTLD_GLOBAL or RTLD_LAZY}); end; function GetProc(handle: Pointer; name: PChar): Pointer; begin Result := dlsym(handle, name); if (Result = nil) and GLXDumpUnresolvedFunctions then WriteLn('Unresolved: ', name); end; var libGLX: Pointer; function InitGLXFromLibrary(libname:pchar): Boolean; begin Result := False; libGLX := LoadLibrary(libname); if not Assigned(libGLX) then exit; %GLXProcsPL GLXInitialized := True; Result := True; end; function InitGLX: Boolean; begin Result := InitGLXFromLibrary('libGL.so') or InitGLXFromLibrary('libGL.so.1') or InitGLXFromLibrary('libMesaGL.so') or InitGLXFromLibrary('libMesaGL.so.3'); end; initialization InitGLX; finalization if Assigned(libGLX) then dlclose(libGLX); end. { $Log$ Revision 1.1 2000-09-03 21:25:45 peter * new updated version * gtkglarea unit and demo * win32 opengl headers * morph3d demo Revision 1.1 2000/07/13 06:34:18 michael + Initial import Revision 1.1 2000/05/31 00:36:08 alex dummy - incomplete code. }