1/* 2 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. 3 * Copyright (C) 2005 Nokia. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "config.h" 28#include "FloatPoint.h" 29 30#include "AffineTransform.h" 31#include "FloatConversion.h" 32#include "IntPoint.h" 33#include "TransformationMatrix.h" 34#include <limits> 35#include <math.h> 36#include <wtf/PrintStream.h> 37 38namespace WebCore { 39 40FloatPoint::FloatPoint(const IntPoint& p) : m_x(p.x()), m_y(p.y()) 41{ 42} 43 44void FloatPoint::normalize() 45{ 46 float tempLength = length(); 47 48 if (tempLength) { 49 m_x /= tempLength; 50 m_y /= tempLength; 51 } 52} 53 54float FloatPoint::slopeAngleRadians() const 55{ 56 return atan2f(m_y, m_x); 57} 58 59float FloatPoint::length() const 60{ 61 return sqrtf(lengthSquared()); 62} 63 64FloatPoint FloatPoint::matrixTransform(const AffineTransform& transform) const 65{ 66 double newX, newY; 67 transform.map(static_cast<double>(m_x), static_cast<double>(m_y), newX, newY); 68 return narrowPrecision(newX, newY); 69} 70 71FloatPoint FloatPoint::matrixTransform(const TransformationMatrix& transform) const 72{ 73 double newX, newY; 74 transform.map(static_cast<double>(m_x), static_cast<double>(m_y), newX, newY); 75 return narrowPrecision(newX, newY); 76} 77 78FloatPoint FloatPoint::narrowPrecision(double x, double y) 79{ 80 return FloatPoint(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y)); 81} 82 83void FloatPoint::dump(PrintStream& out) const 84{ 85 out.printf("(%f, %f)", x(), y()); 86} 87 88} 89