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

Source/core/platform/graphics/FloatPoint.cpp

-/*
- * Copyright (C) 2004, 2006, 2007 Apple Inc.  All rights reserved.
- * Copyright (C) 2005 Nokia.  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.
- */
-
-#include "config.h"
-#include "core/platform/graphics/FloatPoint.h"
-
-#include <math.h>
-#include <limits>
-#include "core/platform/FloatConversion.h"
-#include "core/platform/graphics/IntPoint.h"
-#include "core/platform/graphics/LayoutPoint.h"
-#include "core/platform/graphics/LayoutSize.h"
-#include "core/platform/graphics/skia/SkiaUtils.h"
-#include "core/platform/graphics/transforms/AffineTransform.h"
-#include "core/platform/graphics/transforms/TransformationMatrix.h"
-#include "third_party/skia/include/core/SkPoint.h"
-
-namespace WebCore {
-
-FloatPoint::FloatPoint(const IntPoint& p) : m_x(p.x()), m_y(p.y())
-{
-}
-
-FloatPoint::FloatPoint(const LayoutPoint& p) : m_x(p.x()), m_y(p.y())
-{
-}
-
-void FloatPoint::normalize()
-{
-    float tempLength = length();
-
-    if (tempLength) {
-        m_x /= tempLength;
-        m_y /= tempLength;
-    }
-}
-
-float FloatPoint::slopeAngleRadians() const
-{
-    return atan2f(m_y, m_x);
-}
-
-float FloatPoint::length() const
-{
-    return sqrtf(lengthSquared());
-}
-
-void FloatPoint::move(const LayoutSize& size)
-{
-    m_x += size.width();
-    m_y += size.height();
-}
-
-void FloatPoint::moveBy(const LayoutPoint& point)
-{
-    m_x += point.x();
-    m_y += point.y();
-}
-
-FloatPoint::operator SkPoint() const
-{
-    SkPoint p = { WebCoreFloatToSkScalar(m_x), WebCoreFloatToSkScalar(m_y) };
-    return p;
-}
-
-FloatPoint FloatPoint::matrixTransform(const AffineTransform& transform) const
-{
-    double newX, newY;
-    transform.map(static_cast<double>(m_x), static_cast<double>(m_y), newX, newY);
-    return narrowPrecision(newX, newY);
-}
-
-FloatPoint FloatPoint::matrixTransform(const TransformationMatrix& transform) const
-{
-    double newX, newY;
-    transform.map(static_cast<double>(m_x), static_cast<double>(m_y), newX, newY);
-    return narrowPrecision(newX, newY);
-}
-
-FloatPoint FloatPoint::narrowPrecision(double x, double y)
-{
-    return FloatPoint(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y));
-}
-
-float findSlope(const FloatPoint& p1, const FloatPoint& p2, float& c)
-{
-    if (p2.x() == p1.x())
-        return std::numeric_limits<float>::infinity();
-
-    // y = mx + c
-    float slope = (p2.y() - p1.y()) / (p2.x() - p1.x());
-    c = p1.y() - slope * p1.x();
-    return slope;
-}
-
-bool findIntersection(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& d1, const FloatPoint& d2, FloatPoint& intersection)
-{
-    float pOffset = 0;
-    float pSlope = findSlope(p1, p2, pOffset);
-
-    float dOffset = 0;
-    float dSlope = findSlope(d1, d2, dOffset);
-
-    if (dSlope == pSlope)
-        return false;
-
-    if (pSlope == std::numeric_limits<float>::infinity()) {
-        intersection.setX(p1.x());
-        intersection.setY(dSlope * intersection.x() + dOffset);
-        return true;
-    }
-    if (dSlope == std::numeric_limits<float>::infinity()) {
-        intersection.setX(d1.x());
-        intersection.setY(pSlope * intersection.x() + pOffset);
-        return true;
-    }
-
-    // Find x at intersection, where ys overlap; x = (c' - c) / (m - m')
-    intersection.setX((dOffset - pOffset) / (pSlope - dSlope));
-    intersection.setY(pSlope * intersection.x() + pOffset);
-    return true;
-}
-
-}