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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 CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_
6 #define CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_
7 
8 #include "cc/base/cc_export.h"
9 #include "ui/events/latency_info.h"
10 #include "ui/gfx/size_f.h"
11 #include "ui/gfx/vector2d_f.h"
12 
13 namespace cc {
14 
15 class CC_EXPORT CompositorFrameMetadata {
16  public:
17   CompositorFrameMetadata();
18   ~CompositorFrameMetadata();
19 
20   // The device scale factor used to generate this compositor frame.
21   float device_scale_factor;
22 
23   // Scroll offset and scale of the root layer. This can be used for tasks
24   // like positioning windowed plugins.
25   gfx::Vector2dF root_scroll_offset;
26   float page_scale_factor;
27 
28   // These limits can be used together with the scroll/scale fields above to
29   // determine if scrolling/scaling in a particular direction is possible.
30   gfx::SizeF viewport_size;
31   gfx::SizeF root_layer_size;
32   float min_page_scale_factor;
33   float max_page_scale_factor;
34 
35   // Used to position the Android location top bar and page content, whose
36   // precise position is computed by the renderer compositor.
37   gfx::Vector2dF location_bar_offset;
38   gfx::Vector2dF location_bar_content_translation;
39   float overdraw_bottom_height;
40 
41   ui::LatencyInfo latency_info;
42 };
43 
44 }  // namespace cc
45 
46 #endif  // CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_
47