Move geometry classes from core/platform/graphics to platform/geometry

Source/core/platform/graphics/FloatQuad.h

-/*
- * 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 "core/platform/graphics/FloatPoint.h"
-#include "core/platform/graphics/FloatRect.h"
-#include "core/platform/graphics/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.maxX(), inRect.y())
-        , m_p3(inRect.maxX(), inRect.maxY())
-        , m_p4(inRect.x(), inRect.maxY())
-    {
-    }
-
-    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;
-
-    // Tests whether any part of the rectangle intersects with this quad.
-    // This only works for convex quads.
-    bool intersectsRect(const FloatRect&) const;
-
-    // Test whether any part of the circle/ellipse intersects with this quad.
-    // Note that these two functions only work for convex quads.
-    bool intersectsCircle(const FloatPoint& center, float radius) const;
-    bool intersectsEllipse(const FloatPoint& center, const FloatSize& radii) const;
-
-    // The center of the quad. If the quad is the result of a affine-transformed rectangle this is the same as the original center transformed.
-    FloatPoint center() const
-    {
-        return FloatPoint((m_p1.x() + m_p2.x() + m_p3.x() + m_p4.x()) / 4.0,
-                          (m_p1.y() + m_p2.y() + m_p3.y() + m_p4.y()) / 4.0);
-    }
-
-    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);
-    }
-
-    void scale(float dx, float dy)
-    {
-        m_p1.scale(dx, dy);
-        m_p2.scale(dx, dy);
-        m_p3.scale(dx, dy);
-        m_p4.scale(dx, dy);
-    }
-
-    // Tests whether points are in clock-wise, or counter clock-wise order.
-    // Note that output is undefined when all points are colinear.
-    bool isCounterclockwise() const;
-
-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
-