WebKitCSSMatrix.cpp revision ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddb
1/* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "WebKitCSSMatrix.h" 28 29#include "CSSParser.h" 30#include "CSSStyleSelector.h" 31#include "CSSMutableStyleDeclaration.h" 32#include "CSSPropertyNames.h" 33#include "CSSValueKeywords.h" 34#include "ExceptionCode.h" 35#include <wtf/MathExtras.h> 36 37namespace WebCore { 38 39WebKitCSSMatrix::WebKitCSSMatrix(const TransformationMatrix& m) 40 : m_matrix(m) 41{ 42} 43 44WebKitCSSMatrix::WebKitCSSMatrix(const String& s, ExceptionCode& ec) 45{ 46 setMatrixValue(s, ec); 47} 48 49WebKitCSSMatrix::~WebKitCSSMatrix() 50{ 51} 52 53void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec) 54{ 55 CSSParser p(true); 56 RefPtr<CSSMutableStyleDeclaration> styleDeclaration = CSSMutableStyleDeclaration::create(); 57 if (p.parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true)) { 58 // Convert to TransformOperations. This can fail if a property 59 // requires style (i.e., param uses 'ems' or 'exs') 60 RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform); 61 62 // Check for a "none" or empty transform. In these cases we can use the default identity matrix. 63 if (!value || (value->isPrimitiveValue() && (static_cast<CSSPrimitiveValue*>(value.get()))->getIdent() == CSSValueNone)) 64 return; 65 66 TransformOperations operations; 67 if (!CSSStyleSelector::createTransformOperations(value.get(), 0, 0, operations)) { 68 ec = SYNTAX_ERR; 69 return; 70 } 71 72 // Convert transform operations to a TransformationMatrix. This can fail 73 // if a param has a percentage ('%') 74 TransformationMatrix t; 75 for (unsigned i = 0; i < operations.operations().size(); ++i) { 76 if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) { 77 ec = SYNTAX_ERR; 78 return; 79 } 80 } 81 82 // set the matrix 83 m_matrix = t; 84 } else if (!string.isEmpty()) // There is something there but parsing failed 85 ec = SYNTAX_ERR; 86} 87 88// Perform a concatenation of the matrices (this * secondMatrix) 89PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::multiply(WebKitCSSMatrix* secondMatrix) const 90{ 91 if (!secondMatrix) 92 return 0; 93 94 TransformationMatrix tmp(secondMatrix->m_matrix); 95 tmp.multiply(m_matrix); 96 return WebKitCSSMatrix::create(tmp); 97} 98 99PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::inverse(ExceptionCode& ec) const 100{ 101 if (!m_matrix.isInvertible()) { 102 ec = NOT_SUPPORTED_ERR; 103 return 0; 104 } 105 106 return WebKitCSSMatrix::create(m_matrix.inverse()); 107} 108 109PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::translate(double x, double y, double z) const 110{ 111 if (isnan(x)) 112 x = 0; 113 if (isnan(y)) 114 y = 0; 115 if (isnan(z)) 116 z = 0; 117 return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).translate3d(x, y, z)); 118} 119 120PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const 121{ 122 if (isnan(scaleX)) 123 scaleX = 1; 124 if (isnan(scaleY)) 125 scaleY = scaleX; 126 if (isnan(scaleZ)) 127 scaleZ = 1; 128 return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).scale3d(scaleX, scaleY, scaleZ)); 129} 130 131PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotate(double rotX, double rotY, double rotZ) const 132{ 133 if (isnan(rotX)) 134 rotX = 0; 135 136 if (isnan(rotY) && isnan(rotZ)) { 137 rotZ = rotX; 138 rotX = 0; 139 rotY = 0; 140 } 141 142 if (isnan(rotY)) 143 rotY = 0; 144 if (isnan(rotZ)) 145 rotZ = 0; 146 return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(rotX, rotY, rotZ)); 147} 148 149PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotateAxisAngle(double x, double y, double z, double angle) const 150{ 151 if (isnan(x)) 152 x = 0; 153 if (isnan(y)) 154 y = 0; 155 if (isnan(z)) 156 z = 0; 157 if (isnan(angle)) 158 angle = 0; 159 if (x == 0 && y == 0 && z == 0) 160 z = 1; 161 return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(x, y, z, angle)); 162} 163 164PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewX(double angle) const 165{ 166 if (isnan(angle)) 167 angle = 0; 168 return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewX(angle)); 169} 170 171PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewY(double angle) const 172{ 173 if (isnan(angle)) 174 angle = 0; 175 return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewY(angle)); 176} 177 178String WebKitCSSMatrix::toString() const 179{ 180 // FIXME - Need to ensure valid CSS floating point values (https://bugs.webkit.org/show_bug.cgi?id=20674) 181 if (m_matrix.isAffine()) 182 return String::format("matrix(%f, %f, %f, %f, %f, %f)", 183 m_matrix.a(), m_matrix.b(), m_matrix.c(), m_matrix.d(), m_matrix.e(), m_matrix.f()); 184 return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)", 185 m_matrix.m11(), m_matrix.m12(), m_matrix.m13(), m_matrix.m14(), 186 m_matrix.m21(), m_matrix.m22(), m_matrix.m23(), m_matrix.m24(), 187 m_matrix.m31(), m_matrix.m32(), m_matrix.m33(), m_matrix.m34(), 188 m_matrix.m41(), m_matrix.m42(), m_matrix.m43(), m_matrix.m44()); 189} 190 191} // namespace WebCore 192