1 files changed, 120 insertions, 0 deletions
diff --git a/cc/debug_rect_history.cc b/cc/debug_rect_history.cc
new file mode 100644
index 0000000..7f3c2ea
--- /dev/null
+++ b/cc/debug_rect_history.cc
@@ -0,0 +1,120 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+#include "CCDebugRectHistory.h"
+
+#include "CCDamageTracker.h"
+#include "CCLayerImpl.h"
+#include "CCLayerTreeHost.h"
+#include "CCMathUtil.h"
+
+namespace cc {
+
+CCDebugRectHistory::CCDebugRectHistory()
+{
+}
+
+CCDebugRectHistory::~CCDebugRectHistory()
+{
+}
+
+void CCDebugRectHistory::saveDebugRectsForCurrentFrame(CCLayerImpl* rootLayer, const std::vector<CCLayerImpl*>& renderSurfaceLayerList, const Vector<IntRect>& occludingScreenSpaceRects, const CCLayerTreeSettings& settings)
+{
+    // For now, clear all rects from previous frames. In the future we may want to store
+    // all debug rects for a history of many frames.
+    m_debugRects.clear();
+
+    if (settings.showPaintRects)
+        savePaintRects(rootLayer);
+
+    if (settings.showPropertyChangedRects)
+        savePropertyChangedRects(renderSurfaceLayerList);
+
+    if (settings.showSurfaceDamageRects)
+        saveSurfaceDamageRects(renderSurfaceLayerList);
+
+    if (settings.showScreenSpaceRects)
+        saveScreenSpaceRects(renderSurfaceLayerList);
+
+    if (settings.showOccludingRects)
+        saveOccludingRects(occludingScreenSpaceRects);
+}
+
+
+void CCDebugRectHistory::savePaintRects(CCLayerImpl* layer)
+{
+    // We would like to visualize where any layer's paint rect (update rect) has changed,
+    // regardless of whether this layer is skipped for actual drawing or not. Therefore
+    // we traverse recursively over all layers, not just the render surface list.
+
+    if (!layer->updateRect().isEmpty() && layer->drawsContent()) {
+        FloatRect updateContentRect = layer->updateRect();
+        updateContentRect.scale(layer->contentBounds().width() / static_cast<float>(layer->bounds().width()), layer->contentBounds().height() / static_cast<float>(layer->bounds().height()));
+        m_debugRects.append(CCDebugRect(PaintRectType, CCMathUtil::mapClippedRect(layer->screenSpaceTransform(), updateContentRect)));
+    }
+
+    for (unsigned i = 0; i < layer->children().size(); ++i)
+        savePaintRects(layer->children()[i]);
+}
+
+void CCDebugRectHistory::savePropertyChangedRects(const std::vector<CCLayerImpl*>& renderSurfaceLayerList)
+{
+    for (int surfaceIndex = renderSurfaceLayerList.size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {
+        CCLayerImpl* renderSurfaceLayer = renderSurfaceLayerList[surfaceIndex];
+        CCRenderSurface* renderSurface = renderSurfaceLayer->renderSurface();
+        ASSERT(renderSurface);
+
+        const std::vector<CCLayerImpl*>& layerList = renderSurface->layerList();
+        for (unsigned layerIndex = 0; layerIndex < layerList.size(); ++layerIndex) {
+            CCLayerImpl* layer = layerList[layerIndex];
+
+            if (CCLayerTreeHostCommon::renderSurfaceContributesToTarget<CCLayerImpl>(layer, renderSurfaceLayer->id()))
+                continue;
+
+            if (layer->layerIsAlwaysDamaged())
+                continue;
+
+            if (layer->layerPropertyChanged() || layer->layerSurfacePropertyChanged())
+                m_debugRects.append(CCDebugRect(PropertyChangedRectType, CCMathUtil::mapClippedRect(layer->screenSpaceTransform(), FloatRect(FloatPoint::zero(), layer->contentBounds()))));
+        }
+    }
+}
+
+void CCDebugRectHistory::saveSurfaceDamageRects(const std::vector<CCLayerImpl* >& renderSurfaceLayerList)
+{
+    for (int surfaceIndex = renderSurfaceLayerList.size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {
+        CCLayerImpl* renderSurfaceLayer = renderSurfaceLayerList[surfaceIndex];
+        CCRenderSurface* renderSurface = renderSurfaceLayer->renderSurface();
+        ASSERT(renderSurface);
+
+        m_debugRects.append(CCDebugRect(SurfaceDamageRectType, CCMathUtil::mapClippedRect(renderSurface->screenSpaceTransform(), renderSurface->damageTracker()->currentDamageRect())));
+    }
+}
+
+void CCDebugRectHistory::saveScreenSpaceRects(const std::vector<CCLayerImpl* >& renderSurfaceLayerList)
+{
+    for (int surfaceIndex = renderSurfaceLayerList.size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {
+        CCLayerImpl* renderSurfaceLayer = renderSurfaceLayerList[surfaceIndex];
+        CCRenderSurface* renderSurface = renderSurfaceLayer->renderSurface();
+        ASSERT(renderSurface);
+
+        m_debugRects.append(CCDebugRect(ScreenSpaceRectType, CCMathUtil::mapClippedRect(renderSurface->screenSpaceTransform(), renderSurface->contentRect())));
+
+        if (renderSurfaceLayer->replicaLayer())
+            m_debugRects.append(CCDebugRect(ReplicaScreenSpaceRectType, CCMathUtil::mapClippedRect(renderSurface->replicaScreenSpaceTransform(), renderSurface->contentRect())));
+    }
+}
+
+void CCDebugRectHistory::saveOccludingRects(const Vector<IntRect>& occludingRects)
+{
+    for (size_t i = 0; i < occludingRects.size(); ++i)
+        m_debugRects.append(CCDebugRect(OccludingRectType, occludingRects[i]));
+}
+
+} // namespace cc
+
+#endif // USE(ACCELERATED_COMPOSITING)