gecko/gfx/layers/d3d9/ThebesLayerD3D9.h

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * The Original Code is Mozilla Corporation code.
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 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Bas Schouten <bschouten@mozilla.com>
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#ifndef GFX_THEBESLAYERD3D9_H
#define GFX_THEBESLAYERD3D9_H

#include "Layers.h"
#include "LayerManagerD3D9.h"
#include "gfxImageSurface.h"
#include "ReadbackProcessor.h"

namespace mozilla {
namespace layers {

class ReadbackProcessor;

class ThebesLayerD3D9 : public ThebesLayer,
                        public LayerD3D9
{
public:
  ThebesLayerD3D9(LayerManagerD3D9 *aManager);
  virtual ~ThebesLayerD3D9();

  /* ThebesLayer implementation */
  void InvalidateRegion(const nsIntRegion& aRegion);

  /* LayerD3D9 implementation */
  Layer* GetLayer();
  virtual PRBool IsEmpty();
  virtual void RenderLayer() { RenderThebesLayer(nsnull); }
  virtual void CleanResources();
  virtual void LayerManagerDestroyed();

  void RenderThebesLayer(ReadbackProcessor* aReadback);

private:
  /*
   * D3D9 texture
   */
  nsRefPtr<IDirect3DTexture9> mTexture;
  /*
   * D3D9 texture for render-on-white when doing component alpha
   */
  nsRefPtr<IDirect3DTexture9> mTextureOnWhite;
  /**
   * Visible region bounds used when we drew the contents of the textures
   */
  nsIntRect mTextureRect;

  bool HaveTextures(SurfaceMode aMode)
  {
    return mTexture && (aMode != SURFACE_COMPONENT_ALPHA || mTextureOnWhite);
  }

  /* Checks if our surface has the right content type */
  void VerifyContentType(SurfaceMode aMode);

  /* Ensures we have the necessary texture object(s) and that they correspond
   * to mVisibleRegion.GetBounds(). This creates new texture objects as
   * necessary and also copies existing valid texture data if necessary.
   */
  void UpdateTextures(SurfaceMode aMode);

  /* Render the rectangles of mVisibleRegion with D3D9 using the currently
   * bound textures, target, shaders, etc.
   */
  void RenderRegion(const nsIntRegion& aRegion);

  /* Have a region of our layer drawn */
  void DrawRegion(nsIntRegion &aRegion, SurfaceMode aMode,
                  const nsTArray<ReadbackProcessor::Update>& aReadbackUpdates);

  /* Create a new texture */
  void CreateNewTextures(const gfxIntSize &aSize, SurfaceMode aMode);

  void CopyRegion(IDirect3DTexture9* aSrc, const nsIntPoint &aSrcOffset,
                  IDirect3DTexture9* aDest, const nsIntPoint &aDestOffset,
                  const nsIntRegion &aCopyRegion, nsIntRegion* aValidRegion,
                  float aXRes, float aYRes);

  /**
   * Calculate the desired texture resolution based on
   * the layer managers resolution, and the current
   * transforms scale factor.
   */
  void GetDesiredResolutions(float& aXRes, float& aYRes);

  /* Check if the current texture resolution matches */
  bool ResolutionChanged(float aXRes, float aYRes);
};

} /* layers */
} /* mozilla */
#endif /* GFX_THEBESLAYERD3D9_H */