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https://gitlab.com/freepascal.org/fpc/source.git
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147 lines
3.3 KiB
Smarty
147 lines
3.3 KiB
Smarty
{
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$Id$
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Translation of the Mesa GL, GLU and GLX headers for Free Pascal
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Linux Version, 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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unit GL;
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interface
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uses X,XLib,XUtil;
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// ===================================================================
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// Unit specific extensions
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// ===================================================================
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function InitGLFromLibrary(libname: PChar): Boolean;
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function InitGLUFromLibrary(libname: PChar): Boolean;
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// Requires that the GL library has already been initialized:
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function InitGLX: Boolean;
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// determines automatically which libraries to use:
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function InitGL: Boolean;
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function InitGLU: Boolean;
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var
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GLInitialized, GLUInitialized, GLXInitialized: Boolean;
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%GLDecls
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%GLProcs1
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const
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%GLExtDecls
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%GLExtProcs1
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%GLUDecls
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%GLUProcs1
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%GLXDecls
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%GLXProcs1
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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 then WriteLn('Unresolved: ', name);
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end;
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var
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libGL, libGLU, libGLX: Pointer;
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function InitGLFromLibrary(libname: PChar): Boolean;
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begin
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Result := False;
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libGL := LoadLibrary(libname);
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if not Assigned(libGL) then exit;
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%GLProcs2
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# // Extensions:
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#%GLExtProcs2
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GLInitialized := True;
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Result := True;
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end;
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function InitGLUFromLibrary(libname: PChar): Boolean;
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begin
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Result := False;
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libGLU := LoadLibrary(libname);
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if not Assigned(libGLU) then exit;
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%GLUProcs2
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GLUInitialized := 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 := False;
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if not Assigned(libGL) then exit;
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%GLXProcs2
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GLXInitialized := True;
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Result := True;
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end;
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function InitGL: Boolean;
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begin
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Result := InitGLFromLibrary('libGL.so.1') or InitGLFromLibrary('libMesaGL.so.1');
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end;
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function InitGLU: Boolean;
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begin
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Result := InitGLUFromLibrary('libGLU.so.1') or InitGLUFromLibrary('libMesaGLU.so.1');
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end;
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finalization
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if Assigned(libGL) then dlclose(libGL);
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if Assigned(libGLU) then dlclose(libGLU);
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if Assigned(libGLX) then dlclose(libGLX);
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end.
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