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