gecko-dev/gfx/layers/d3d9/LayerManagerD3D9.h

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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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 * Software distributed under the License is distributed on an "AS IS" basis,
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 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is Mozilla Corporation code.
 *
 * 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_LAYERMANAGERD3D9_H
#define GFX_LAYERMANAGERD3D9_H

#include "Layers.h"

#include <windows.h>
#include <d3d9.h>

#include "gfxContext.h"
#include "nsIWidget.h"

#include "DeviceManagerD3D9.h"

namespace mozilla {
namespace layers {

class LayerD3D9;
class ThebesLayerD3D9;

/*
 * This is the LayerManager used for Direct3D 9. For now this will render on
 * the main thread.
 */
class THEBES_API LayerManagerD3D9 : public LayerManager {
public:
  LayerManagerD3D9(nsIWidget *aWidget);
  virtual ~LayerManagerD3D9();

  /*
   * Initializes the layer manager, this is when the layer manager will
   * actually access the device and attempt to create the swap chain used
   * to draw to the window. If this method fails the device cannot be used.
   * This function is not threadsafe.
   *
   * \return True is initialization was succesful, false when it was not.
   */
  PRBool Initialize();

  /*
   * Sets the clipping region for this layer manager. This is important on
   * windows because using OGL we no longer have GDI's native clipping. Therefor
   * widget must tell us what part of the screen is being invalidated,
   * and we should clip to this.
   *
   * \param aClippingRegion Region to clip to. Setting an empty region
   * will disable clipping.
   */
  void SetClippingRegion(const nsIntRegion& aClippingRegion);

  /*
   * LayerManager implementation.
   */
  void BeginTransaction();

  void BeginTransactionWithTarget(gfxContext* aTarget);

  void EndConstruction();

  struct CallbackInfo {
    DrawThebesLayerCallback Callback;
    void *CallbackData;
  };

  void EndTransaction(DrawThebesLayerCallback aCallback,
                      void* aCallbackData);

  const CallbackInfo &GetCallbackInfo() { return mCurrentCallbackInfo; }

  void SetRoot(Layer* aLayer);

  virtual already_AddRefed<ThebesLayer> CreateThebesLayer();

  virtual already_AddRefed<ContainerLayer> CreateContainerLayer();

  virtual already_AddRefed<ImageLayer> CreateImageLayer();

  virtual already_AddRefed<ColorLayer> CreateColorLayer();

  virtual already_AddRefed<CanvasLayer> CreateCanvasLayer();

  virtual already_AddRefed<ImageContainer> CreateImageContainer();

  virtual LayersBackend GetBackendType() { return LAYERS_D3D9; }

  /*
   * Helper methods.
   */
  void SetClippingEnabled(PRBool aEnabled);

  void SetShaderMode(DeviceManagerD3D9::ShaderMode aMode)
    { mDeviceManager->SetShaderMode(aMode); }

  IDirect3DDevice9 *device() const { return mDeviceManager->device(); }
  DeviceManagerD3D9 *deviceManager() const { return mDeviceManager; }

  /** 
   * Return pointer to the Nv3DVUtils instance. Re-direct to mDeviceManager.
   */ 
  Nv3DVUtils *GetNv3DVUtils()  { return mDeviceManager ? mDeviceManager->GetNv3DVUtils() : NULL; } 

  /** 
   * Indicate whether 3D is enabled or not 
   */ 
  PRBool Is3DEnabled() { return mIs3DEnabled; } 

  static void OnDeviceManagerDestroy(DeviceManagerD3D9 *aDeviceManager) {
    if(aDeviceManager == mDeviceManager)
      mDeviceManager = nsnull;
  }

private:
  /* Device manager instance */
  static DeviceManagerD3D9 *mDeviceManager;

  /* Swap chain associated with this layer manager */
  nsRefPtr<SwapChainD3D9> mSwapChain;

  /* Widget associated with this layer manager */
  nsIWidget *mWidget;

  /*
   * Context target, NULL when drawing directly to our swap chain.
   */
  nsRefPtr<gfxContext> mTarget;

  /* Current root layer. */
  LayerD3D9 *mRootLayer;

  /* Callback info for current transaction */
  CallbackInfo mCurrentCallbackInfo;

  /* Flag that indicates whether 3D is enabled or not*/ 
  PRBool mIs3DEnabled; 

  /*
   * Region we're clipping our current drawing to.
   */
  nsIntRegion mClippingRegion;

  /*
   * Render the current layer tree to the active target.
   */
  void Render();

  /*
   * Setup the pipeline.
   */
  void SetupPipeline();

  /*
   * Copies the content of our backbuffer to the set transaction target.
   */
  void PaintToTarget();

};

/*
 * General information and tree management for OGL layers.
 */
class LayerD3D9
{
public:
  LayerD3D9(LayerManagerD3D9 *aManager);

  virtual LayerD3D9 *GetFirstChildD3D9() { return nsnull; }

  void SetFirstChild(LayerD3D9 *aParent);

  virtual Layer* GetLayer() = 0;

  virtual void RenderLayer() = 0;

  IDirect3DDevice9 *device() const { return mD3DManager->device(); }
protected:
  LayerManagerD3D9 *mD3DManager;
};

} /* layers */
} /* mozilla */

#endif /* GFX_LAYERMANAGERD3D9_H */