third_party/WebKit/Source/web/tests/sim/SimCompositor.h

   1 // Copyright 2015 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 SimCompositor_h
   6 #define SimCompositor_h
   7
   8 namespace blink {
   9
  10 class SimDisplayItemList;
  11 class SimLayerTreeView;
  12 class WebViewImpl;
  13
  14 // Simulated very basic compositor that's capable of running the BeginMainFrame
  15 // processing steps on WebView: beginFrame, layout, paint.
  16 //
  17 // The painting capabilities are very limited in that only the main layer of
  18 // every CompositedDeprecatedPaintLayerMapping will be painted, squashed layers
  19 // are not supported and the entirety of every layer is always repainted even if
  20 // only part of the layer was invalid.
  21 //
  22 // Note: This also does not support compositor driven animations.
  23 class SimCompositor final {
  24 public:
  25     explicit SimCompositor(SimLayerTreeView&);
  26     ~SimCompositor();
  27
  28     void setWebViewImpl(WebViewImpl&);
  29
  30     // Execute the BeginMainFrame processing steps, an approximation of what
  31     // cc::ThreadProxy::BeginMainFrame would do.
  32     SimDisplayItemList beginFrame();
  33
  34 private:
  35     SimLayerTreeView* m_layerTreeView;
  36     WebViewImpl* m_webViewImpl;
  37     double m_lastFrameTimeMonotonic;
  38 };
  39
  40 } // namespace blink
  41
  42 #endif