gecko/gfx/layers/opengl/CanvasLayerOGL.h

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 * The Initial Developer of the Original Code is Mozilla Foundation.
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 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@pobox.com>
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#ifndef GFX_CANVASLAYEROGL_H
#define GFX_CANVASLAYEROGL_H

#ifdef MOZ_IPC
# include "mozilla/layers/PLayers.h"
# include "mozilla/layers/ShadowLayers.h"
#endif  // MOZ_IPC

#include "LayerManagerOGL.h"
#include "gfxASurface.h"

namespace mozilla {
namespace layers {

class THEBES_API CanvasLayerOGL :
  public CanvasLayer,
  public LayerOGL
{
public:
  CanvasLayerOGL(LayerManagerOGL *aManager)
    : CanvasLayer(aManager, NULL),
      LayerOGL(aManager),
      mTexture(0),
      mDelayedUpdates(PR_FALSE)
  { 
      mImplData = static_cast<LayerOGL*>(this);
  }
  ~CanvasLayerOGL() { Destroy(); }

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

  // LayerOGL implementation
  virtual void Destroy();
  virtual Layer* GetLayer() { return this; }
  virtual void RenderLayer(int aPreviousFrameBuffer,
                           const nsIntPoint& aOffset);

protected:
  void UpdateSurface();

  nsRefPtr<gfxASurface> mCanvasSurface;
  nsRefPtr<GLContext> mCanvasGLContext;
  gl::ShaderProgramType mLayerProgram;

  void MakeTexture();
  GLuint mTexture;

  PRPackedBool mDelayedUpdates;
  PRPackedBool mGLBufferIsPremultiplied;
  PRPackedBool mNeedsYFlip;
};

#ifdef MOZ_IPC
// NB: eventually we'll have separate shadow canvas2d and shadow
// canvas3d layers, but currently they look the same from the
// perspective of the compositor process
class ShadowCanvasLayerOGL : public ShadowCanvasLayer,
                             public LayerOGL
{
  typedef gl::TextureImage TextureImage;

public:
  ShadowCanvasLayerOGL(LayerManagerOGL* aManager);
  virtual ~ShadowCanvasLayerOGL();

  // CanvasLayer impl
  virtual void Initialize(const Data& aData);
  // This isn't meaningful for shadow canvas.
  virtual void Updated(const nsIntRect&) {}

  // ShadowCanvasLayer impl
  virtual already_AddRefed<gfxSharedImageSurface>
  Swap(gfxSharedImageSurface* aNewFront);

  virtual void DestroyFrontBuffer();

  virtual void Disconnect();

  // LayerOGL impl
  void Destroy();
  Layer* GetLayer();
  virtual void RenderLayer(int aPreviousFrameBuffer,
                           const nsIntPoint& aOffset);

private:
  nsRefPtr<TextureImage> mTexImage;


  // XXX FIXME holding to free
  nsRefPtr<gfxSharedImageSurface> mDeadweight;


};
#endif  // MOZ_IPC

} /* layers */
} /* mozilla */
#endif /* GFX_IMAGELAYEROGL_H */