/*
* $Id: TransformationMatrix.java 341 2012-06-18 14:38:54Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2012 1T3XT BVBA
* Authors: VVB, Bruno Lowagie, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
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*
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*/
package com.itextpdf.tool.xml.svg.utils;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import com.itextpdf.awt.geom.AffineTransform;
import com.itextpdf.tool.xml.svg.exceptions.SvgParseException;
public class TransformationMatrix {
public static AffineTransform getTransformationMatrix(String transform){
//matrix, translate, scale, rotate, skewX, skewY
AffineTransform matrix = null;
List<String> listWithTransformations = splitString(transform);
for (String str : listWithTransformations) {
AffineTransform newMatrix = strToMatrix(str);
if(newMatrix != null){
if(matrix == null){
matrix = newMatrix;
}else{
matrix.concatenate(newMatrix);
}
}
}
return matrix;
}
static List<String> splitString(String transform){
ArrayList<String> list = new ArrayList<String>();
StringTokenizer tokenizer = new StringTokenizer(transform,")", false);
while (tokenizer.hasMoreTokens()){
list.add(tokenizer.nextToken().trim()+")");
}
return list;
}
static AffineTransform strToMatrix(String str){
try{
//matrix, translate, scale, rotate, skewX, skewY
if(str.startsWith("matrix")){
return createWithMatrix(getValuesFromStr(str));
}else if(str.startsWith("translate")){
return createForTranslate(getValuesFromStr(str));
}else if(str.startsWith("scale")){
return createForScale(getValuesFromStr(str));
}else if(str.startsWith("rotate")){
return createForRotate(getValuesFromStr(str));
}else if(str.startsWith("skewX")){
return createForSkewX(getValuesFromStr(str));
}else if(str.startsWith("skewY")){
return createForSkewY(getValuesFromStr(str));
}else{
//no transformation at all
return null;
}
}catch(SvgParseException exp){
//when a mistake happens, do nothing
return null;
}
}
//if only one coordinate the second one is zero
static AffineTransform createForSkewY(List<Float> values) throws SvgParseException{
if(values.size() != 1){
throw new SvgParseException("Could not parse the transform");
}
return new AffineTransform(1, Math.tan(Math.toRadians(values.get(0))), 0, 1, 0, 0);
}
//if only one coordinate the second one is zero
static AffineTransform createForSkewX(List<Float> values) throws SvgParseException{
if(values.size() != 1){
throw new SvgParseException("Could not parse the transform");
}
return new AffineTransform(1, 0, Math.tan(Math.toRadians(values.get(0))), 1, 0, 0);
}
//if only one coordinate the second one is zero
static AffineTransform createForRotate(List<Float> values) throws SvgParseException{
if(values.size() != 1){
throw new SvgParseException("Could not parse the transform");
}
return AffineTransform.getRotateInstance(Math.toRadians(values.get(0)));
}
//if only one coordinate the second one is zero
static AffineTransform createForScale(List<Float> values) throws SvgParseException{
if(values.size() == 1){
return AffineTransform.getScaleInstance(values.get(0), values.get(0));
}
if(values.size() != 2){
throw new SvgParseException("Could not parse the transform");
}
return AffineTransform.getScaleInstance(values.get(0), values.get(1));
}
//if only one coordinate the second one is zero
static AffineTransform createForTranslate(List<Float> values) throws SvgParseException{
if(values.size() == 1){
return AffineTransform.getTranslateInstance(values.get(0), 0);
}
if(values.size() != 2){
throw new SvgParseException("Could not parse the transform");
}
return AffineTransform.getTranslateInstance(values.get(0), values.get(1));
}
static AffineTransform createWithMatrix(List<Float> values) throws SvgParseException{
if(values.size() != 6){
throw new SvgParseException("Could not parse the transform");
}
return new AffineTransform(values.get(0), values.get(1), values.get(2), values.get(3), values.get(4), values.get(5));
}
static List<Float> getValuesFromStr(String str) throws SvgParseException{
try{
String numbers = str.substring(str.indexOf('(')+1, str.indexOf(')'));
List<Float> result = new ArrayList<Float>();
StringTokenizer tokenizer = new StringTokenizer(numbers, ",");
while (tokenizer.hasMoreTokens()){
result.add(Float.parseFloat(tokenizer.nextToken()));
}
return result;
}catch(Exception exp){
throw new SvgParseException("Could not parse the transform");
}
}
}