Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 152 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/FloatQuad.h b/Source/WebCore/platform/graphics/FloatQuad.h
new file mode 100644
index 0000000..6cd86f6
--- /dev/null
+++ b/Source/WebCore/platform/graphics/FloatQuad.h
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2008 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. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * 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.
+ */
+
+#ifndef FloatQuad_h
+#define FloatQuad_h
+
+#include "FloatPoint.h"
+#include "FloatRect.h"
+#include "IntRect.h"
+
+namespace WebCore {
+
+// A FloatQuad is a collection of 4 points, often representing the result of
+// mapping a rectangle through transforms. When initialized from a rect, the
+// points are in clockwise order from top left.
+class FloatQuad {
+public:
+    FloatQuad()
+    {
+    }
+
+    FloatQuad(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& p3, const FloatPoint& p4)
+        : m_p1(p1)
+        , m_p2(p2)
+        , m_p3(p3)
+        , m_p4(p4)
+    {
+    }
+
+    FloatQuad(const FloatRect& inRect)
+        : m_p1(inRect.location())
+        , m_p2(inRect.right(), inRect.y())
+        , m_p3(inRect.right(), inRect.bottom())
+        , m_p4(inRect.x(), inRect.bottom())
+    {
+    }
+
+    FloatPoint p1() const { return m_p1; }
+    FloatPoint p2() const { return m_p2; }
+    FloatPoint p3() const { return m_p3; }
+    FloatPoint p4() const { return m_p4; }
+
+    void setP1(const FloatPoint& p) { m_p1 = p; }
+    void setP2(const FloatPoint& p) { m_p2 = p; }
+    void setP3(const FloatPoint& p) { m_p3 = p; }
+    void setP4(const FloatPoint& p) { m_p4 = p; }
+
+    // isEmpty tests that the bounding box is empty. This will not identify
+    // "slanted" empty quads.
+    bool isEmpty() const { return boundingBox().isEmpty(); }
+
+    // Tests whether this quad can be losslessly represented by a FloatRect,
+    // that is, if two edges are parallel to the x-axis and the other two
+    // are parallel to the y-axis. If this method returns true, the
+    // corresponding FloatRect can be retrieved with boundingBox().
+    bool isRectilinear() const;
+
+    // Tests whether the given point is inside, or on an edge or corner of this quad.
+    bool containsPoint(const FloatPoint&) const;
+
+    // Tests whether the four corners of other are inside, or coincident with the sides of this quad.
+    // Note that this only works for convex quads, but that includes all quads that originate
+    // from transformed rects.
+    bool containsQuad(const FloatQuad&) const;
+
+    FloatRect boundingBox() const;
+    IntRect enclosingBoundingBox() const
+    {
+        return enclosingIntRect(boundingBox());
+    }
+
+    void move(const FloatSize& offset)
+    {
+        m_p1 += offset;
+        m_p2 += offset;
+        m_p3 += offset;
+        m_p4 += offset;
+    }
+
+    void move(float dx, float dy)
+    {
+        m_p1.move(dx, dy);
+        m_p2.move(dx, dy);
+        m_p3.move(dx, dy);
+        m_p4.move(dx, dy);
+    }
+
+private:
+    FloatPoint m_p1;
+    FloatPoint m_p2;
+    FloatPoint m_p3;
+    FloatPoint m_p4;
+};
+
+inline FloatQuad& operator+=(FloatQuad& a, const FloatSize& b)
+{
+    a.move(b);
+    return a;
+}
+
+inline FloatQuad& operator-=(FloatQuad& a, const FloatSize& b)
+{
+    a.move(-b.width(), -b.height());
+    return a;
+}
+
+inline bool operator==(const FloatQuad& a, const FloatQuad& b)
+{
+    return a.p1() == b.p1() &&
+           a.p2() == b.p2() && 
+           a.p3() == b.p3() &&
+           a.p4() == b.p4();
+}
+
+inline bool operator!=(const FloatQuad& a, const FloatQuad& b)
+{
+    return a.p1() != b.p1() ||
+           a.p2() != b.p2() || 
+           a.p3() != b.p3() ||
+           a.p4() != b.p4();
+}
+
+}   // namespace WebCore
+
+
+#endif // FloatQuad_h
+