content/public/renderer/android/synchronous_compositor.h

   1 // Copyright (c) 2013 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_RENDERER_ANDROID_SYNCHRONOUS_COMPOSTIOR_
   6 #define CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_
   7
   8 #include "ui/gfx/rect.h"
   9 #include "ui/gfx/size.h"
  10
  11 class SkCanvas;
  12
  13 namespace gfx {
  14 class Transform;
  15 };
  16
  17 namespace content {
  18
  19 class SynchronousCompositorClient;
  20
  21 // Interface for embedders that which to direct compositing operations
  22 // synchronously under their own control. Only meaningful when the
  23 // kEnableSyncrhonousRendererCompositor flag is specified.
  24 class SynchronousCompositor {
  25  public:
  26   // Allows changing or resetting the client to NULL (this must be used if
  27   // the client is being deleted prior to the DidDestroyCompositor() call
  28   // being received by the client). Ownership of |client| remains with
  29   // the caller.
  30   virtual void SetClient(SynchronousCompositorClient* client) = 0;
  31
  32   // "On demand" SW draw, into the supplied canvas (observing the transform
  33   // and clip set there-in).
  34   virtual bool DemandDrawSw(SkCanvas* canvas) = 0;
  35
  36   // "On demand" hardware draw. The content is first clipped to |damage_area|,
  37   // then transformed through |transform|, and finally clipped to |view_size|.
  38   virtual bool DemandDrawHw(
  39       gfx::Size view_size,
  40       const gfx::Transform& transform,
  41       gfx::Rect damage_area) = 0;
  42
  43  protected:
  44   virtual ~SynchronousCompositor() {}
  45 };
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSTIOR_