root/src/swft/SVGTransformParser.cpp

#include "SVGTransformParser.h"

using namespace std;

namespace SWF {

void TransformParser::printWarning(const string& transformType) {
        cerr << "WARNING: wrong number of parameters in " << transformType << " transformation" << endl;
}

void TransformParser::handleData(const string& transformType, const vector<string>& params) {
        size_t cnt = params.size();
        Matrix m;

        double p[cnt];  
        for(int i = 0; i < cnt; i++) {
                p[i] = atof(params[i].c_str());
        }

        if(transformType == "matrix") {
                if(cnt == 6) {
                        Matrix t = Matrix(p[0], p[2], p[4] * 20,
                                          p[1], p[3], p[5] * 20,
                                             0,    0,         1);
                        transformMatrix *= t;
                } else {
                        printWarning(transformType);
                }
        } else if(transformType == "translate") {
                if(cnt == 1) {
                        transformMatrix.translate(p[0] * 20, 0);
                } else if (cnt == 2) {
                        transformMatrix.translate(p[0] * 20, p[1] * 20);
                } else {
                        printWarning(transformType);
                }
        } else if(transformType == "scale") {
                if(cnt == 1) {
                        transformMatrix.scale(p[0]);
                } else if (cnt == 2) {
                        transformMatrix.scale(p[0], p[1]);
                } else {
                        printWarning(transformType);
                }
        } else if(transformType == "rotate") {
                if(cnt == 1) {
                        transformMatrix.rotate(p[0] * M_PI / 180.0);
                } else if(cnt == 3) {
                        transformMatrix.translate(p[1] * 20, p[2] * 20);
                        transformMatrix.rotate(p[0] * M_PI / 180.0);
                        transformMatrix.translate(-p[1] * 20, -p[2] * 20);
                } else {
                        printWarning(transformType);
                }
        } else if(transformType == "skewX") {
                if(cnt == 1) {
                        transformMatrix.skewX(p[0] * M_PI / 180.0);
                } else {
                        printWarning(transformType);
                }
        } else if(transformType == "skewY") {
                if(cnt == 1) {
                        transformMatrix.skewY(p[0] * M_PI / 180.0);
                } else {
                        printWarning(transformType);
                }
        } else {
                cerr << "WARNING: unknown SVG transformation (" << transformType << ")" << endl;
        }
}

}