cc/output/compositor_frame_metadata.h

   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/base/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_