diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/TransformState.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/TransformState.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2009 Apple 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
+ * 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. 
+ */
+
+#ifndef TransformState_h
+#define TransformState_h
+
+#include "AffineTransform.h"
+#include "FloatPoint.h"
+#include "FloatQuad.h"
+#include "IntSize.h"
+#include "TransformationMatrix.h"
+#include <wtf/Noncopyable.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+class TransformState : public Noncopyable {
+public:
+    enum TransformDirection { ApplyTransformDirection, UnapplyInverseTransformDirection };
+    enum TransformAccumulation { FlattenTransform, AccumulateTransform };
+
+    // If quad is non-null, it will be mapped
+    TransformState(TransformDirection mappingDirection, const FloatPoint& p, const FloatQuad* quad = 0)
+        : m_lastPlanarPoint(p)
+        , m_accumulatingTransform(false)
+        , m_mapQuad(quad != 0)
+        , m_direction(mappingDirection)
+    {
+        if (quad)
+            m_lastPlanarQuad = *quad;
+    }
+    
+    void move(const IntSize& s, TransformAccumulation accumulate = FlattenTransform)
+    {
+        move(s.width(), s.height(), accumulate);
+    }
+    
+    void move(int x, int y, TransformAccumulation = FlattenTransform);
+    void applyTransform(const AffineTransform& transformFromContainer, TransformAccumulation = FlattenTransform);
+    void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation = FlattenTransform);
+    void flatten();
+
+    // Return the coords of the point or quad in the last flattened layer
+    FloatPoint lastPlanarPoint() const { return m_lastPlanarPoint; }
+    FloatQuad lastPlanarQuad() const { return m_lastPlanarQuad; }
+
+    // Return the point or quad mapped through the current transform
+    FloatPoint mappedPoint() const;
+    FloatQuad mappedQuad() const;
+
+private:
+    void flattenWithTransform(const TransformationMatrix&);
+    
+    FloatPoint m_lastPlanarPoint;
+    FloatQuad m_lastPlanarQuad;
+
+    // We only allocate the transform if we need to
+    OwnPtr<TransformationMatrix> m_accumulatedTransform;
+    bool m_accumulatingTransform;
+    bool m_mapQuad;
+    TransformDirection m_direction;
+};
+
+class HitTestingTransformState : public RefCounted<HitTestingTransformState> {
+public:
+    static PassRefPtr<HitTestingTransformState> create(const FloatPoint& p, const FloatQuad& quad)
+    {
+        return adoptRef(new HitTestingTransformState(p, quad));
+    }
+
+    static PassRefPtr<HitTestingTransformState> create(const HitTestingTransformState& other)
+    {
+        return adoptRef(new HitTestingTransformState(other));
+    }
+
+    enum TransformAccumulation { FlattenTransform, AccumulateTransform };
+    void translate(int x, int y, TransformAccumulation);
+    void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation);
+
+    FloatPoint mappedPoint() const;
+    FloatQuad mappedQuad() const;
+    void flatten();
+
+    FloatPoint m_lastPlanarPoint;
+    FloatQuad m_lastPlanarQuad;
+    TransformationMatrix m_accumulatedTransform;
+    bool m_accumulatingTransform;
+
+private:
+    HitTestingTransformState(const FloatPoint& p, const FloatQuad& quad)
+        : m_lastPlanarPoint(p)
+        , m_lastPlanarQuad(quad)
+        , m_accumulatingTransform(false)
+    {
+    }
+    
+    HitTestingTransformState(const HitTestingTransformState& other)
+        : RefCounted<HitTestingTransformState>()
+        , m_lastPlanarPoint(other.m_lastPlanarPoint)
+        , m_lastPlanarQuad(other.m_lastPlanarQuad)
+        , m_accumulatedTransform(other.m_accumulatedTransform)
+        , m_accumulatingTransform(other.m_accumulatingTransform)
+    {
+    }
+    
+    void flattenWithTransform(const TransformationMatrix&);
+};
+
+} // namespace WebCore
+
+#endif // TransformState_h