GHOST_ContextWGL.h

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2013 Blender Foundation.
 * All rights reserved.
 */
 
#pragma once
 
//#define WIN32_COMPOSITING
 
#include "GHOST_Context.h"
 
#include <GL/wglew.h>
 
#ifndef GHOST_OPENGL_WGL_RESET_NOTIFICATION_STRATEGY
#  define GHOST_OPENGL_WGL_RESET_NOTIFICATION_STRATEGY 0
#endif
 
class GHOST_ContextWGL : public GHOST_Context {
  /* XR code needs low level graphics data to send to OpenXR. */
  friend class GHOST_XrGraphicsBindingOpenGL;
 
 public:
  GHOST_ContextWGL(bool stereoVisual,
                   bool alphaBackground,
                   HWND hWnd,
                   HDC hDC,
                   int contextProfileMask,
                   int contextMajorVersion,
                   int contextMinorVersion,
                   int contextFlags,
                   int contextResetNotificationStrategy);
 
  ~GHOST_ContextWGL();
 
  GHOST_TSuccess swapBuffers();
 
  GHOST_TSuccess activateDrawingContext();
 
  GHOST_TSuccess releaseDrawingContext();
 
  GHOST_TSuccess initializeDrawingContext();
 
  GHOST_TSuccess releaseNativeHandles();
 
  GHOST_TSuccess setSwapInterval(int interval);
 
  GHOST_TSuccess getSwapInterval(int &intervalOut);
 
 private:
  int choose_pixel_format(bool stereoVisual, bool needAlpha);
  int choose_pixel_format_arb(bool stereoVisual, bool needAlpha);
  int _choose_pixel_format_arb_1(bool stereoVisual, bool needAlpha);
 
  void initContextWGLEW(PIXELFORMATDESCRIPTOR &preferredPFD);
 
  HWND m_hWnd;
  HDC m_hDC;
 
  const int m_contextProfileMask;
  const int m_contextMajorVersion;
  const int m_contextMinorVersion;
  const int m_contextFlags;
  const bool m_alphaBackground;
  const int m_contextResetNotificationStrategy;
 
  HGLRC m_hGLRC;
 
#ifndef NDEBUG
  const char *m_dummyVendor;
  const char *m_dummyRenderer;
  const char *m_dummyVersion;
#endif
 
  static HGLRC s_sharedHGLRC;
  static int s_sharedCount;
};