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 "third_party/skia/include/core/SkColor.h"
  13 #include "ui/events/latency_info.h"
  14 #include "ui/gfx/geometry/size_f.h"
  15 #include "ui/gfx/geometry/vector2d_f.h"
  16
  17 namespace cc {
  18
  19 class CC_EXPORT CompositorFrameMetadata {
  20  public:
  21   CompositorFrameMetadata();
  22   ~CompositorFrameMetadata();
  23
  24   // The device scale factor used to generate this compositor frame.
  25   float device_scale_factor;
  26
  27   // Scroll offset and scale of the root layer. This can be used for tasks
  28   // like positioning windowed plugins.
  29   gfx::Vector2dF root_scroll_offset;
  30   float page_scale_factor;
  31
  32   // These limits can be used together with the scroll/scale fields above to
  33   // determine if scrolling/scaling in a particular direction is possible.
  34   gfx::SizeF scrollable_viewport_size;
  35   gfx::SizeF root_layer_size;
  36   float min_page_scale_factor;
  37   float max_page_scale_factor;
  38   bool root_overflow_x_hidden;
  39   bool root_overflow_y_hidden;
  40
  41   // Used to position the Android location top bar and page content, whose
  42   // precise position is computed by the renderer compositor.
  43   gfx::Vector2dF location_bar_offset;
  44   gfx::Vector2dF location_bar_content_translation;
  45
  46   // This color is usually obtained from the background color of the <body>
  47   // element. It can be used for filling in gutter areas around the frame when
  48   // it's too small to fill the box the parent reserved for it.
  49   SkColor root_background_color;
  50
  51   // Provides selection region updates relative to the current viewport. If the
  52   // selection is empty or otherwise unused, the bound types will indicate such.
  53   ViewportSelection selection;
  54
  55   std::vector<ui::LatencyInfo> latency_info;
  56
  57   // A set of SurfaceSequences that this frame satisfies (always in the same
  58   // namespace as the current Surface).
  59   std::vector<uint32_t> satisfies_sequences;
  60 };
  61
  62 }  // namespace cc
  63
  64 #endif  // CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_