khtml/svg/SVGTransform.cpp

   1 /*
   2     Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
   3                   2004, 2005 Rob Buis <buis@kde.org>
   4
   5     This file is part of the KDE project
   6
   7     This library is free software; you can redistribute it and/or
   8     modify it under the terms of the GNU Library General Public
   9     License as published by the Free Software Foundation; either
  10     version 2 of the License, or (at your option) any later version.
  11
  12     This library is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15     Library General Public License for more details.
  16
  17     You should have received a copy of the GNU Library General Public License
  18     along with this library; see the file COPYING.LIB.  If not, write to
  19     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20     Boston, MA 02110-1301, USA.
  21 */
  22
  23 #include "config.h"
  24 #include "wtf/Platform.h"
  25 #if ENABLE(SVG)
  26
  27 #include "FloatPoint.h"
  28 #include "FloatSize.h"
  29 #include "SVGAngle.h"
  30 #include "SVGSVGElement.h"
  31 #include "SVGTransform.h"
  32
  33 #include <math.h>
  34
  35 using namespace WebCore;
  36
  37 SVGTransform::SVGTransform()
  38     : m_type(SVG_TRANSFORM_UNKNOWN)
  39     , m_angle(0)
  40 {
  41 }
  42
  43 SVGTransform::SVGTransform(SVGTransformType type)
  44     : m_type(type)
  45     , m_angle(0)
  46     , m_center(FloatPoint())
  47     , m_matrix(AffineTransform())
  48 {
  49 }
  50
  51 SVGTransform::SVGTransform(const AffineTransform& matrix)
  52     : m_type(SVG_TRANSFORM_MATRIX)
  53     , m_angle(0)
  54     , m_matrix(matrix)
  55 {
  56 }
  57
  58 SVGTransform::~SVGTransform()
  59 {
  60 }
  61
  62 bool SVGTransform::isValid()
  63 {
  64     return (m_type != SVG_TRANSFORM_UNKNOWN);
  65 }
  66
  67 SVGTransform::SVGTransformType SVGTransform::type() const
  68 {
  69     return m_type;
  70 }
  71
  72 AffineTransform SVGTransform::matrix() const
  73 {
  74     return m_matrix;
  75 }
  76
  77 float SVGTransform::angle() const
  78 {
  79     return m_angle;
  80 }
  81
  82 FloatPoint SVGTransform::rotationCenter() const
  83 {
  84     return m_center;
  85 }
  86
  87 void SVGTransform::setMatrix(const AffineTransform& matrix)
  88 {
  89     m_type = SVG_TRANSFORM_MATRIX;
  90     m_angle = 0;
  91
  92     m_matrix = matrix;
  93 }
  94
  95 void SVGTransform::setTranslate(float tx, float ty)
  96 {
  97     m_type = SVG_TRANSFORM_TRANSLATE;
  98     m_angle = 0;
  99
 100     m_matrix.reset();
 101     m_matrix.translate(tx, ty);
 102 }
 103
 104 FloatPoint SVGTransform::translate() const
 105 {
 106     return FloatPoint::narrowPrecision(m_matrix.e(), m_matrix.f());
 107 }
 108
 109 void SVGTransform::setScale(float sx, float sy)
 110 {
 111     m_type = SVG_TRANSFORM_SCALE;
 112     m_angle = 0;
 113     m_center = FloatPoint();
 114
 115     m_matrix.reset();
 116     m_matrix.scale(sx, sy);
 117 }
 118
 119 FloatSize SVGTransform::scale() const
 120 {
 121     return FloatSize::narrowPrecision(m_matrix.a(), m_matrix.d());
 122 }
 123
 124 void SVGTransform::setRotate(float angle, float cx, float cy)
 125 {
 126     m_type = SVG_TRANSFORM_ROTATE;
 127     m_angle = angle;
 128     m_center = FloatPoint(cx, cy);
 129
 130     // TODO: toString() implementation, which can show cx, cy (need to be stored?)
 131     m_matrix.reset();
 132     m_matrix.translate(cx, cy);
 133     m_matrix.rotate(angle);
 134     m_matrix.translate(-cx, -cy);
 135 }
 136
 137 void SVGTransform::setSkewX(float angle)
 138 {
 139     m_type = SVG_TRANSFORM_SKEWX;
 140     m_angle = angle;
 141
 142     m_matrix.reset();
 143     m_matrix.skewX(angle);
 144 }
 145
 146 void SVGTransform::setSkewY(float angle)
 147 {
 148     m_type = SVG_TRANSFORM_SKEWY;
 149     m_angle = angle;
 150
 151     m_matrix.reset();
 152     m_matrix.skewY(angle);
 153 }
 154
 155 // vim:ts=4:noet
 156 #endif // ENABLE(SVG)
 157