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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
      6 #define CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
      7 
      8 #include "base/callback.h"
      9 #include "cc/resources/ui_resource_bitmap.h"
     10 #include "content/common/content_export.h"
     11 #include "content/public/browser/android/ui_resource_provider.h"
     12 #include "ui/gfx/native_widget_types.h"
     13 #include "ui/gfx/rect.h"
     14 #include "ui/gfx/size.h"
     15 
     16 class SkBitmap;
     17 
     18 namespace cc {
     19 class Layer;
     20 }
     21 
     22 namespace gfx {
     23 class JavaBitmap;
     24 }
     25 
     26 namespace content {
     27 class CompositorClient;
     28 class UIResourceProvider;
     29 
     30 // An interface to the browser-side compositor.
     31 class CONTENT_EXPORT Compositor {
     32  public:
     33   virtual ~Compositor() {}
     34 
     35   // Performs the global initialization needed before any compositor
     36   // instance can be used. This should be called only once.
     37   static void Initialize();
     38 
     39   // Creates and returns a compositor instance.  |root_window| needs to outlive
     40   // the compositor as it manages callbacks on the compositor.
     41   static Compositor* Create(CompositorClient* client,
     42                             gfx::NativeWindow root_window);
     43 
     44   // Attaches the layer tree.
     45   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) = 0;
     46 
     47   // Set the scale factor from DIP to pixel.
     48   virtual void setDeviceScaleFactor(float factor) = 0;
     49 
     50   // Set the output surface bounds.
     51   virtual void SetWindowBounds(const gfx::Size& size) = 0;
     52 
     53   // Sets the window visibility. When becoming invisible, resources will get
     54   // freed and other calls into the compositor are not allowed until after
     55   // having been made visible again.
     56   virtual void SetVisible(bool visible) = 0;
     57 
     58   // Set the output surface which the compositor renders into.
     59   virtual void SetSurface(jobject surface) = 0;
     60 
     61   // Tells the view tree to assume a transparent background when rendering.
     62   virtual void SetHasTransparentBackground(bool flag) = 0;
     63 
     64   // Request layout and draw. You only need to call this if you need to trigger
     65   // Composite *without* having modified the layer tree.
     66   virtual void SetNeedsComposite() = 0;
     67 
     68   // Returns the UI resource provider associated with the compositor.
     69   virtual UIResourceProvider& GetUIResourceProvider() = 0;
     70 
     71  protected:
     72   Compositor() {}
     73 };
     74 
     75 }  // namespace content
     76 
     77 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_COMPOSITOR_H_
     78