// Filename: config_wgldisplay.cxx
// Created by:  drose (20Dec02)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
//
// To contact the maintainers of this program write to
// panda3d-general@lists.sourceforge.net .
//
////////////////////////////////////////////////////////////////////

#include "config_wgldisplay.h"
#include "wglGraphicsBuffer.h"
#include "wglGraphicsPipe.h"
#include "wglGraphicsStateGuardian.h"
#include "wglGraphicsWindow.h"
#include "graphicsPipeSelection.h"
#include "dconfig.h"
#include "pandaSystem.h"

Configure(config_wgldisplay);
NotifyCategoryDef(wgldisplay, "display");

ConfigureFn(config_wgldisplay) {
  init_libwgldisplay();
}

ConfigVariableInt gl_force_pixfmt
("gl-force-pixfmt", 0);

ConfigVariableBool gl_force_invalid
("gl-force-invalid", false,
 PRC_DESC("Set this true to force all GL windows to fail to open "
          "correctly (for debugging)."));

ConfigVariableBool gl_do_vidmemsize_check
("gl-do-vidmemsize-check", true,
 PRC_DESC("This is true to insist that low-memory cards open only 640x480 "
          "fullscreen windows, no matter what resolution of window was "
          "requested.  It only affects fullscreen windows."));

ConfigVariableBool gl_support_fbo
  ("gl-support-fbo", true,
   PRC_DESC("Configure this false if your GL's implementation of "
            "EXT_framebuffer_object is broken.  The system might still be "
            "able to create buffers using pbuffers or the like."));


////////////////////////////////////////////////////////////////////
//     Function: init_libwgldisplay
//  Description: Initializes the library.  This must be called at
//               least once before any of the functions or classes in
//               this library can be used.  Normally it will be
//               called by the static initializers and need not be
//               called explicitly, but special cases exist.
////////////////////////////////////////////////////////////////////
void
init_libwgldisplay() {
  static bool initialized = false;
  if (initialized) {
    return;
  }
  initialized = true;

  wglGraphicsBuffer::init_type();
  wglGraphicsPipe::init_type();
  wglGraphicsStateGuardian::init_type();
  wglGraphicsWindow::init_type();

  GraphicsPipeSelection *selection = GraphicsPipeSelection::get_global_ptr();
  selection->add_pipe_type(wglGraphicsPipe::get_class_type(),
                           wglGraphicsPipe::pipe_constructor);

  PandaSystem *ps = PandaSystem::get_global_ptr();
  ps->set_system_tag("OpenGL", "window_system", "WGL");
}
