/* -*- 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
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * 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.
 *
 * Contributor(s):
 *   Bas Schouten <bschouten@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef GFX_LAYERMANAGERD3D9_H
#define GFX_LAYERMANAGERD3D9_H

#include "Layers.h"

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

#include "gfxContext.h"
#include "nsIWidget.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);

  IDirect3DDevice9 *device() const { return mDevice; }

  enum ShaderMode {
    RGBLAYER,
    YCBCRLAYER,
    SOLIDCOLORLAYER
  };

  void SetShaderMode(ShaderMode aMode);

  nsTArray<ThebesLayerD3D9*> mThebesLayers;

private:
  /* Direct3D9 instance */
  static IDirect3D9 *mD3D9;

  /* Widget associated with this layer manager */
  nsIWidget *mWidget;
  /*
   * Context target, NULL when drawing directly to our swap chain.
   */
  nsRefPtr<gfxContext> mTarget;

  nsRefPtr<IDirect3DDevice9> mDevice;

  /* Vertex shader used for layer quads */
  nsRefPtr<IDirect3DVertexShader9> mLayerVS;

  /* Pixel shader used for RGB textures */
  nsRefPtr<IDirect3DPixelShader9> mRGBPS;

  /* Pixel shader used for RGB textures */
  nsRefPtr<IDirect3DPixelShader9> mYCbCrPS;

  /* Pixel shader used for solid colors */
  nsRefPtr<IDirect3DPixelShader9> mSolidColorPS;

  /* Vertex buffer containing our basic vertex structure */
  nsRefPtr<IDirect3DVertexBuffer9> mVB;

  /* Our vertex declaration */
  nsRefPtr<IDirect3DVertexDeclaration9> mVD;

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

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

  /*
   * 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();
  /*
   * Setup the backbuffer.
   *
   * \return PR_TRUE if setup was succesful
   */
  PRBool SetupBackBuffer();
  /*
   * Setup the render state for the surface.
   */
  void SetupRenderState();
  /*
   * Copies the content of our backbuffer to the set transaction target.
   */
  void PaintToTarget();
  /*
   * Verifies all required device capabilities are present.
   */
  PRBool VerifyCaps();

};

/*
 * 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 */