Initial import attempt, just to play with. Many things disabled/removed

ui/cc/cc/CCQuadCuller.cpp

Index: ui/cc/cc/CCQuadCuller.cpp
diff --git a/ui/cc/cc/CCQuadCuller.cpp b/ui/cc/cc/CCQuadCuller.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..da8980295215239126b0e98b113d5b9eb8bc8dd9
--- /dev/null
+++ b/ui/cc/cc/CCQuadCuller.cpp
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "cc/CCQuadCuller.h"
+
+#include "Region.h"
+#include "SkColor.h"
+#include "cc/CCDebugBorderDrawQuad.h"
+#include "cc/CCLayerImpl.h"
+#include "cc/CCOverdrawMetrics.h"
+#include <public/WebTransformationMatrix.h>
+
+using namespace std;
+
+namespace WebCore {
+
+static const int debugTileBorderWidth = 1;
+static const int debugTileBorderAlpha = 120;
+static const int debugTileBorderColorRed = 160;
+static const int debugTileBorderColorGreen = 100;
+static const int debugTileBorderColorBlue = 0;
+
+CCQuadCuller::CCQuadCuller(CCQuadList& quadList, CCLayerImpl* layer, const CCOcclusionTrackerImpl* occlusionTracker, bool showCullingWithDebugBorderQuads)
+    : m_quadList(quadList)
+    , m_layer(layer)
+    , m_occlusionTracker(occlusionTracker)
+    , m_showCullingWithDebugBorderQuads(showCullingWithDebugBorderQuads)
+{
+}
+
+static inline bool appendQuadInternal(PassOwnPtr<CCDrawQuad> passDrawQuad, const IntRect& culledRect, CCQuadList& quadList, const CCOcclusionTrackerImpl& occlusionTracker, bool createDebugBorderQuads)
+{
+    OwnPtr<CCDrawQuad> drawQuad(passDrawQuad);
+    bool keepQuad = !culledRect.isEmpty();
+    if (keepQuad)
+        drawQuad->setQuadVisibleRect(culledRect);
+
+    occlusionTracker.overdrawMetrics().didCullForDrawing(drawQuad->quadTransform(), drawQuad->quadRect(), culledRect);
+    occlusionTracker.overdrawMetrics().didDraw(drawQuad->quadTransform(), culledRect, drawQuad->opaqueRect());
+
+    if (keepQuad) {
+        if (createDebugBorderQuads && !drawQuad->isDebugQuad() && drawQuad->quadVisibleRect() != drawQuad->quadRect()) {
+            SkColor borderColor = SkColorSetARGB(debugTileBorderAlpha, debugTileBorderColorRed, debugTileBorderColorGreen, debugTileBorderColorBlue);
+            quadList.append(CCDebugBorderDrawQuad::create(drawQuad->sharedQuadState(), drawQuad->quadVisibleRect(), borderColor, debugTileBorderWidth));
+        }
+
+        // Release the quad after we're done using it.
+        quadList.append(drawQuad.release());
+    }
+    return keepQuad;
+}
+
+bool CCQuadCuller::append(PassOwnPtr<CCDrawQuad> passDrawQuad)
+{
+    IntRect culledRect = m_occlusionTracker->unoccludedContentRect(m_layer, passDrawQuad->quadRect());
+    return appendQuadInternal(passDrawQuad, culledRect, m_quadList, *m_occlusionTracker, m_showCullingWithDebugBorderQuads);
+}
+
+bool CCQuadCuller::appendSurface(PassOwnPtr<CCDrawQuad> passDrawQuad)
+{
+    IntRect culledRect = m_occlusionTracker->unoccludedContributingSurfaceContentRect(m_layer->renderSurface(), false, passDrawQuad->quadRect());
+    return appendQuadInternal(passDrawQuad, culledRect, m_quadList, *m_occlusionTracker, m_showCullingWithDebugBorderQuads);
+}
+
+} // namespace WebCore
+#endif // USE(ACCELERATED_COMPOSITING)