{$MODE delphi}

unit GLUT;

interface

{$MACRO ON}

{$IFDEF Win32}
  {$DEFINE glut_dll := }
  {$DEFINE gldecl := stdcall;}
  {$DEFINE extdecl := stdcall;}
  uses windows, GL;
{$ELSE}
  {$MESSAGE Unsupported platform.}
{$ENDIF}


function InitGLUTFromLibrary(libname: PChar): Boolean;

// determines automatically which library to use:
function InitGLUT: Boolean;


var
  GLUTDumpUnresolvedFunctions,
  GLUTInitialized: Boolean;


%GLUTDeclsIF

var
%GLUTProcsPD


implementation


type
  HInstance = LongWord;

var
  libGLUT: HInstance;

function GetProc(handle: HInstance; name: PChar): Pointer;
begin
  Result := GetProcAddress(handle, name);
  if (Result = nil) and GLUTDumpUnresolvedFunctions then
    WriteLn('Unresolved: ', name);
end;

function InitGLUTFromLibrary(libname: PChar): Boolean;
begin
  Result := False;
  libGLUT := LoadLibrary(libname);
  if libGLUT = 0 then exit;

%GLUTProcsPL

  GLUTInitialized := True;
  Result := True;
end;


function InitGLUT: Boolean;
begin
  Result := InitGLUTFromLibrary('glut32.dll');
end;


initialization
  InitGLUT;
finalization
  if libGLUT <> 0 then FreeLibrary(libGLUT);
end.