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 "cc/output/viewport_selection_bound.h"
  12 #include "ui/events/latency_info.h"
  13 #include "ui/gfx/geometry/size_f.h"
  14 #include "ui/gfx/geometry/vector2d_f.h"
  15
  16 namespace cc {
  17
  18 class CC_EXPORT CompositorFrameMetadata {
  19  public:
  20   CompositorFrameMetadata();
  21   ~CompositorFrameMetadata();
  22
  23   // The device scale factor used to generate this compositor frame.
  24   float device_scale_factor;
  25
  26   // Scroll offset and scale of the root layer. This can be used for tasks
  27   // like positioning windowed plugins.
  28   gfx::Vector2dF root_scroll_offset;
  29   float page_scale_factor;
  30
  31   // These limits can be used together with the scroll/scale fields above to
  32   // determine if scrolling/scaling in a particular direction is possible.
  33   gfx::SizeF scrollable_viewport_size;
  34   gfx::SizeF root_layer_size;
  35   float min_page_scale_factor;
  36   float max_page_scale_factor;
  37
  38   // Used to position the Android location top bar and page content, whose
  39   // precise position is computed by the renderer compositor.
  40   gfx::Vector2dF location_bar_offset;
  41   gfx::Vector2dF location_bar_content_translation;
  42
  43   // Provides selection region updates relative to the current viewport. If the
  44   // selection is empty or otherwise unused, the bound types will indicate such.
  45   ViewportSelectionBound selection_start;
  46   ViewportSelectionBound selection_end;
  47
  48   std::vector<ui::LatencyInfo> latency_info;
  49
  50   // A set of SurfaceSequences that this frame satisfies (always in the same
  51   // namespace as the current Surface).
  52   std::vector<uint32_t> satisfies_sequences;
  53 };
  54
  55 }  // namespace cc
  56
  57 #endif  // CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_