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| 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 SimLayerTreeView; |
| 11 class WebViewImpl; |
| 12 |
| 13 // Simulated very basic compositor that's capable of running the BeginMainFrame |
| 14 // processing steps on WebView: beginFrame, layout, paint. |
| 15 // |
| 16 // The painting capabilities are very limited in that only the main layer of |
| 17 // every CompositedDeprecatedPaintLayerMapping will be painted, squashed layers |
| 18 // are not supported and the entirety of every layer is always repainted even if |
| 19 // only part of the layer was invalid. |
| 20 // |
| 21 // Note: This also does not support compositor driven animations. |
| 22 class SimCompositor final { |
| 23 public: |
| 24 explicit SimCompositor(SimLayerTreeView&); |
| 25 ~SimCompositor(); |
| 26 |
| 27 void setWebViewImpl(WebViewImpl&); |
| 28 |
| 29 struct BeginFrameResult { |
| 30 // If any text was drawn in any layer by the painting phase. |
| 31 bool didDrawText = false; |
| 32 |
| 33 // Approximate number of draw commands issued by the painting phase of |
| 34 // beginFrame. |
| 35 int drawCount = 0; |
| 36 }; |
| 37 |
| 38 // Execute the BeginMainFrame processing steps, an approximation of what |
| 39 // cc::ThreadProxy::BeginMainFrame would do. |
| 40 BeginFrameResult beginFrame(); |
| 41 |
| 42 private: |
| 43 SimLayerTreeView* m_layerTreeView; |
| 44 WebViewImpl* m_webViewImpl; |
| 45 double m_lastFrameTimeMonotonic; |
| 46 }; |
| 47 |
| 48 } // namespace blink |
| 49 |
| 50 #endif |
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