fpc/packages/opengl/build/glx_linux.tem
peter 7039100d0d * new updated version
* gtkglarea unit and demo
  * win32 opengl headers
  * morph3d demo
2000-09-03 21:25:44 +00:00

144 lines
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{
$Id$
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.
}