GLExtensions.h - mozsearch

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef VRB_GL_EXTENSIONS_DOT_H

#define VRB_GL_EXTENSIONS_DOT_H

#include "vrb/Forward.h"

#include "vrb/MacroUtils.h"

#include "vrb/gl.h"

namespace vrb {

class GLExtensions {

public:

  // Known GL extensions that can be queried by IsExtensionSupported.

  enum class Ext {

    EXT_multisampled_render_to_texture,

    OVR_multiview,

    OVR_multiview2,

    OVR_multiview_multisampled_render_to_texture

};

  // GL extension function pointers

  struct Functions {

    PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC glRenderbufferStorageMultisampleEXT;

    PFNGLFRAMEBUFFERTEXTURE2DMULTISAMPLEEXTPROC glFramebufferTexture2DMultisampleEXT;

    PFNGLFRAMEBUFFERTEXTUREMULTIVIEWOVRPROC glFramebufferTextureMultiviewOVR;

    PFNGLFRAMEBUFFERTEXTUREMULTISAMPLEMULTIVIEWOVRPROC glFramebufferTextureMultisampleMultiviewOVR;

};

  static GLExtensionsPtr Create(RenderContextPtr& aContext);

  void Initialize();

  bool IsExtensionSupported(GLExtensions::Ext aExtension) const;

  const GLExtensions::Functions & GetFunctions() const;

protected:

  struct State;

  GLExtensions(State& aState);

  ~GLExtensions();

private:

  State& m;

  GLExtensions() = delete;

  VRB_NO_DEFAULTS(GLExtensions)

};

#endif // VRB_GL_EXTENSIONS_DOT_H