chrome/browser/vr/base_graphics_delegate.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_VR_BASE_GRAPHICS_DELEGATE_H_
#define CHROME_BROWSER_VR_BASE_GRAPHICS_DELEGATE_H_

#include "base/memory/scoped_refptr.h"
#include "chrome/browser/vr/graphics_delegate.h"

namespace gl {
class GLContext;
class GLShareGroup;
class GLSurface;
}  // namespace gl

namespace vr {

class VR_EXPORT BaseGraphicsDelegate : public GraphicsDelegate {
 public:
  BaseGraphicsDelegate();

  BaseGraphicsDelegate(const BaseGraphicsDelegate&) = delete;
  BaseGraphicsDelegate& operator=(const BaseGraphicsDelegate&) = delete;

  ~BaseGraphicsDelegate() override;

  // GraphicsDelegate implementation.
  bool Initialize(const scoped_refptr<gl::GLSurface>& surface) override;
  bool RunInSkiaContext(base::OnceClosure callback) override;

 protected:
  void SwapSurfaceBuffers();

 private:
  enum ContextId { kNone = -1, kMainContext, kSkiaContext, kNumContexts };

  bool MakeContextCurrent(ContextId context_id);

  scoped_refptr<gl::GLSurface> surface_;
  scoped_refptr<gl::GLShareGroup> share_group_;
  scoped_refptr<gl::GLContext> contexts_[kNumContexts];
  ContextId curr_context_id_ = kNone;
};

}  // namespace vr

#endif  // CHROME_BROWSER_VR_BASE_GRAPHICS_DELEGATE_H_