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

ui/cc/cc/CCLayerQuad.cpp

+/*
+ * Copyright (C) 2011 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/CCLayerQuad.h"
+
+namespace WebCore {
+
+CCLayerQuad::Edge::Edge(const FloatPoint& p, const FloatPoint& q)
+{
+    ASSERT(p != q);
+
+    FloatPoint tangent(p.y() - q.y(), q.x() - p.x());
+    float cross2 = p.x() * q.y() - q.x() * p.y();
+
+    set(tangent.x(), tangent.y(), cross2);
+    scale(1.0f / tangent.length());
+}
+
+CCLayerQuad::CCLayerQuad(const FloatQuad& quad)
+{
+    // Create edges.
+    m_left = Edge(quad.p4(), quad.p1());
+    m_right = Edge(quad.p2(), quad.p3());
+    m_top = Edge(quad.p1(), quad.p2());
+    m_bottom = Edge(quad.p3(), quad.p4());
+
+    float sign = quad.isCounterclockwise() ? -1 : 1;
+    m_left.scale(sign);
+    m_right.scale(sign);
+    m_top.scale(sign);
+    m_bottom.scale(sign);
+}
+
+FloatQuad CCLayerQuad::floatQuad() const
+{
+    return FloatQuad(m_left.intersect(m_top),
+                     m_top.intersect(m_right),
+                     m_right.intersect(m_bottom),
+                     m_bottom.intersect(m_left));
+}
+
+void CCLayerQuad::toFloatArray(float flattened[12]) const
+{
+    flattened[0] = m_left.x();
+    flattened[1] = m_left.y();
+    flattened[2] = m_left.z();
+    flattened[3] = m_top.x();
+    flattened[4] = m_top.y();
+    flattened[5] = m_top.z();
+    flattened[6] = m_right.x();
+    flattened[7] = m_right.y();
+    flattened[8] = m_right.z();
+    flattened[9] = m_bottom.x();
+    flattened[10] = m_bottom.y();
+    flattened[11] = m_bottom.z();
+}
+
+} // namespace WebCore
+
+#endif // USE(ACCELERATED_COMPOSITING)