gecko/gfx/layers/d3d10/CanvasLayerD3D10.h

/* -*- 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 GFX_CANVASLAYERD3D10_H
#define GFX_CANVASLAYERD3D10_H

#include "LayerManagerD3D10.h"
#include "GLContext.h"
#include "gfxASurface.h"

#include "mozilla/Preferences.h"

namespace mozilla {
namespace layers {

class THEBES_API CanvasLayerD3D10 : public CanvasLayer,
                                    public LayerD3D10
{
public:
  CanvasLayerD3D10(LayerManagerD3D10 *aManager)
    : CanvasLayer(aManager, NULL)
    , LayerD3D10(aManager)
    , mDataIsPremultiplied(false)
    , mNeedsYFlip(false)
    , mHasAlpha(true)
  {
      mImplData = static_cast<LayerD3D10*>(this);
      mForceReadback = Preferences::GetBool("webgl.force-layers-readback", false);
  }

  ~CanvasLayerD3D10();

  // CanvasLayer implementation
  virtual void Initialize(const Data& aData);

  // LayerD3D10 implementation
  virtual Layer* GetLayer();
  virtual void RenderLayer();

private:
  typedef mozilla::gl::GLContext GLContext;

  void UpdateSurface();

  nsRefPtr<gfxASurface> mSurface;
  mozilla::RefPtr<mozilla::gfx::DrawTarget> mDrawTarget;
  nsRefPtr<GLContext> mGLContext;
  nsRefPtr<ID3D10Texture2D> mTexture;
  nsRefPtr<ID3D10ShaderResourceView> mUploadSRView;
  nsRefPtr<ID3D10ShaderResourceView> mSRView;

  bool mDataIsPremultiplied;
  bool mNeedsYFlip;
  bool mIsD2DTexture;
  bool mHasAlpha;
  bool mForceReadback;

  nsAutoArrayPtr<uint8_t> mCachedTempBlob;
  uint32_t mCachedTempBlob_Size;

  uint8_t* GetTempBlob(const uint32_t aSize)
  {
    if (!mCachedTempBlob || aSize != mCachedTempBlob_Size) {
      mCachedTempBlob = new uint8_t[aSize];
      mCachedTempBlob_Size = aSize;
    }

    return mCachedTempBlob;
  }

  void DiscardTempBlob()
  {
    mCachedTempBlob = nullptr;
  }
};

} /* layers */
} /* mozilla */
#endif /* GFX_CANVASLAYERD3D10_H */