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