1 // Copyright 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.
5 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
6 #define CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
8 #include "base/memory/ref_counted.h"
9 #include "content/common/content_export.h"
10 #include "gpu/command_buffer/service/in_process_command_buffer.h"
11 #include "ui/gfx/rect.h"
12 #include "ui/gfx/size.h"
17 class CompositorFrame;
18 class CompositorFrameAck;
26 class GLInProcessContext;
31 class SynchronousCompositorClient;
34 // Interface for embedders that wish to direct compositing operations
35 // synchronously under their own control. Only meaningful when the
36 // kEnableSyncrhonousRendererCompositor flag is specified.
37 class CONTENT_EXPORT SynchronousCompositor {
39 // Must be called once per WebContents instance. Will create the compositor
40 // instance as needed, but only if |client| is non-NULL.
41 static void SetClientForWebContents(WebContents* contents,
42 SynchronousCompositorClient* client);
44 // Allows changing or resetting the client to NULL (this must be used if
45 // the client is being deleted prior to the DidDestroyCompositor() call
46 // being received by the client). Ownership of |client| remains with
48 virtual void SetClient(SynchronousCompositorClient* client) = 0;
50 static void SetGpuService(
51 scoped_refptr<gpu::InProcessCommandBuffer::Service> service);
53 // By default, synchronous compopsitor records the full layer, not only
54 // what is inside and around the view port. This can be used to switch
55 // between this record-full-layer behavior and normal record-around-viewport
57 static void SetRecordFullDocument(bool record_full_document);
59 // Synchronously initialize compositor for hardware draw. Can only be called
60 // while compositor is in software only mode, either after compositor is
61 // first created or after ReleaseHwDraw is called. It is invalid to
62 // DemandDrawHw before this returns true.
63 virtual bool InitializeHwDraw() = 0;
65 // Reverse of InitializeHwDraw above. Can only be called while hardware draw
66 // is already initialized. Brings compositor back to software only mode and
67 // releases all hardware resources.
68 virtual void ReleaseHwDraw() = 0;
70 // "On demand" hardware draw. The content is first clipped to |damage_area|,
71 // then transformed through |transform|, and finally clipped to |view_size|.
72 virtual scoped_ptr<cc::CompositorFrame> DemandDrawHw(
73 gfx::Size surface_size,
74 const gfx::Transform& transform,
77 gfx::Rect viewport_rect_for_tile_priority,
78 const gfx::Transform& transform_for_tile_priority) = 0;
80 // For delegated rendering, return resources from parent compositor to this.
81 // Note that all resources must be returned before ReleaseHwDraw.
82 virtual void ReturnResources(const cc::CompositorFrameAck& frame_ack) = 0;
84 // "On demand" SW draw, into the supplied canvas (observing the transform
85 // and clip set there-in).
86 virtual bool DemandDrawSw(SkCanvas* canvas) = 0;
88 // Set the memory limit policy of this compositor.
89 virtual void SetMemoryPolicy(size_t bytes_limit) = 0;
91 // Should be called by the embedder after the embedder had modified the
92 // scroll offset of the root layer (as returned by
93 // SynchronousCompositorClient::GetTotalRootLayerScrollOffset).
94 virtual void DidChangeRootLayerScrollOffset() = 0;
97 virtual ~SynchronousCompositor() {}
100 } // namespace content
102 #endif // CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_