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144 lines
3.3 KiB
Plaintext
144 lines
3.3 KiB
Plaintext
{
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$Id$
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Translation of the Mesa GLX headers for FreePascal
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Copyright (C) 1999 Sebastian Guenther
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Mesa 3-D graphics library
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Version: 3.0
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Copyright (C) 1995-1998 Brian Paul
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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}
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{$MODE delphi} // objfpc would not work because of direct proc var assignments
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{You have to enable Macros (compiler switch "-Sm") for compiling this unit!
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This is necessary for supporting different platforms with different calling
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conventions via a single unit.}
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unit GLX;
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interface
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{$MACRO ON}
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{$IFDEF Linux}
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uses
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X, XLib, XUtil;
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{$DEFINE HasGLX} // Activate GLX stuff
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{$ELSE}
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{$MESSAGE Unsupported platform.}
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{$ENDIF}
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{$IFNDEF HasGLX}
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{$MESSAGE GLX not present on this platform.}
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{$ENDIF}
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// =======================================================
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// Unit specific extensions
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// =======================================================
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// Note: Requires that the GL library has already been initialized
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function InitGLX: Boolean;
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var
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GLXDumpUnresolvedFunctions,
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GLXInitialized: Boolean;
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// =======================================================
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// GLX consts, types and functions
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// =======================================================
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%GLXDeclsIF
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var
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%GLXProcsPD
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// =======================================================
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//
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// =======================================================
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implementation
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{$LINKLIB m}
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function dlopen(AFile: PChar; mode: LongInt): Pointer; external 'dl';
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function dlclose(handle: Pointer): LongInt; external 'dl';
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function dlsym(handle: Pointer; name: PChar): Pointer; external 'dl';
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function LoadLibrary(name: PChar): Pointer;
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begin
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Result := dlopen(name, $101 {RTLD_GLOBAL or RTLD_LAZY});
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end;
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function GetProc(handle: Pointer; name: PChar): Pointer;
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begin
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Result := dlsym(handle, name);
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if (Result = nil) and GLXDumpUnresolvedFunctions then
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WriteLn('Unresolved: ', name);
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end;
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var
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libGLX: Pointer;
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function InitGLXFromLibrary(libname:pchar): Boolean;
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begin
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Result := False;
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libGLX := LoadLibrary(libname);
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if not Assigned(libGLX) then exit;
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%GLXProcsPL
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GLXInitialized := True;
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Result := True;
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end;
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function InitGLX: Boolean;
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begin
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Result := InitGLXFromLibrary('libGL.so') or
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InitGLXFromLibrary('libGL.so.1') or
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InitGLXFromLibrary('libMesaGL.so') or
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InitGLXFromLibrary('libMesaGL.so.3');
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end;
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initialization
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InitGLX;
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finalization
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if Assigned(libGLX) then dlclose(libGLX);
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end.
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{
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$Log$
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Revision 1.1 2000-09-03 21:25:45 peter
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* new updated version
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* gtkglarea unit and demo
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* win32 opengl headers
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* morph3d demo
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Revision 1.1 2000/07/13 06:34:18 michael
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+ Initial import
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Revision 1.1 2000/05/31 00:36:08 alex
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dummy - incomplete code.
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}
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