The Tor Browser: gfx/layers/composite/ThebesLayerComposite.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef GFX_ThebesLayerComposite_H

     7 #define GFX_ThebesLayerComposite_H

     9 #include "Layers.h"                     // for Layer (ptr only), etc

    10 #include "gfxRect.h"                    // for gfxRect

    11 #include "mozilla/Attributes.h"         // for MOZ_OVERRIDE

    12 #include "mozilla/RefPtr.h"             // for RefPtr

    13 #include "mozilla/layers/LayerManagerComposite.h"  // for LayerComposite, etc

    14 #include "mozilla/layers/LayersTypes.h"  // for LayerRenderState, etc

    15 #include "nsDebug.h"                    // for NS_RUNTIMEABORT

    16 #include "nsRegion.h"                   // for nsIntRegion

    17 #include "nscore.h"                     // for nsACString

    19 struct nsIntPoint;

    20 struct nsIntRect;

    23 namespace mozilla {

    24 namespace layers {

    26 /**

    27  * Thebes layers use ContentHosts for their compsositable host.

    28  * By using different ContentHosts, ThebesLayerComposite support tiled and

    29  * non-tiled Thebes layers and single or double buffering.

    30  */

    32 class CompositableHost;

    33 class ContentHost;

    34 class TiledLayerComposer;

    36 class ThebesLayerComposite : public ThebesLayer,

    37                              public LayerComposite

    38 {

    39 public:

    40   ThebesLayerComposite(LayerManagerComposite *aManager);

    41   virtual ~ThebesLayerComposite();

    43   virtual void Disconnect() MOZ_OVERRIDE;

    45   virtual LayerRenderState GetRenderState() MOZ_OVERRIDE;

    47   CompositableHost* GetCompositableHost() MOZ_OVERRIDE;

    49   virtual void Destroy() MOZ_OVERRIDE;

    51   virtual Layer* GetLayer() MOZ_OVERRIDE;

    53   virtual TiledLayerComposer* GetTiledLayerComposer() MOZ_OVERRIDE;

    55   virtual void RenderLayer(const nsIntRect& aClipRect) MOZ_OVERRIDE;

    57   virtual void CleanupResources() MOZ_OVERRIDE;

    59   virtual bool SetCompositableHost(CompositableHost* aHost) MOZ_OVERRIDE;

    61   virtual LayerComposite* AsLayerComposite() MOZ_OVERRIDE { return this; }

    63   void EnsureTiled() { mRequiresTiledProperties = true; }

    65   virtual void InvalidateRegion(const nsIntRegion& aRegion)

    66   {

    67     NS_RUNTIMEABORT("ThebesLayerComposites can't fill invalidated regions");

    68   }

    70   void SetValidRegion(const nsIntRegion& aRegion)

    71   {

    72     MOZ_LAYERS_LOG_IF_SHADOWABLE(this, ("Layer::Mutated(%p) ValidRegion", this));

    73     mValidRegion = aRegion;

    74     Mutated();

    75   }

    77   MOZ_LAYER_DECL_NAME("ThebesLayerComposite", TYPE_THEBES)

    79 protected:

    81   virtual nsACString& PrintInfo(nsACString& aTo, const char* aPrefix) MOZ_OVERRIDE;

    83 private:

    84   CSSToScreenScale GetEffectiveResolution();

    86   RefPtr<ContentHost> mBuffer;

    87   bool mRequiresTiledProperties;

    88 };

    90 } /* layers */

    91 } /* mozilla */

    92 #endif /* GFX_ThebesLayerComposite_H */

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