blob: f559b97337ee48bf5855521b502ca1d53ebcf859 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
#define CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
class SkCanvas;
namespace gfx {
class GLSurface;
class Transform;
};
namespace content {
class WebContents;
class SynchronousCompositorClient;
// Interface for embedders that wish to direct compositing operations
// synchronously under their own control. Only meaningful when the
// kEnableSyncrhonousRendererCompositor flag is specified.
class CONTENT_EXPORT SynchronousCompositor {
public:
// Must be called once per WebContents instance. Will create the compositor
// instance as needed, but only if |client| is non-NULL.
static void SetClientForWebContents(WebContents* contents,
SynchronousCompositorClient* client);
// Allows changing or resetting the client to NULL (this must be used if
// the client is being deleted prior to the DidDestroyCompositor() call
// being received by the client). Ownership of |client| remains with
// the caller.
virtual void SetClient(SynchronousCompositorClient* client) = 0;
// Synchronously initialize compositor for hardware draw. Can only be called
// while compositor is in software only mode, either after compositor is
// first created or after ReleaseHwDraw is called. It is invalid to
// DemandDrawHw before this returns true. |surface| is the GLSurface that
// should be used to create the underlying hardware context.
virtual bool InitializeHwDraw(scoped_refptr<gfx::GLSurface> surface) = 0;
// Reverse of InitializeHwDraw above. Can only be called while hardware draw
// is already initialized. Brings compositor back to software only mode and
// releases all hardware resources.
virtual void ReleaseHwDraw() = 0;
// "On demand" hardware draw. The content is first clipped to |damage_area|,
// then transformed through |transform|, and finally clipped to |view_size|
// and by the existing stencil buffer if any.
virtual bool DemandDrawHw(
gfx::Size view_size,
const gfx::Transform& transform,
gfx::Rect damage_area,
bool stencil_enabled) = 0;
// "On demand" SW draw, into the supplied canvas (observing the transform
// and clip set there-in).
virtual bool DemandDrawSw(SkCanvas* canvas) = 0;
// Should be called by the embedder after the embedder had modified the
// scroll offset of the root layer (as returned by
// SynchronousCompositorClient::GetTotalRootLayerScrollOffset).
virtual void DidChangeRootLayerScrollOffset() = 0;
protected:
virtual ~SynchronousCompositor() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
|
