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/*************************************************************************
** ShadingPatch.cpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2021 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** 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 General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include <sstream>
#include "ShadingPatch.hpp"
#include "TensorProductPatch.hpp"
#include "TriangularPatch.hpp"
#include "utility.hpp"
using namespace std;
/** Get functions to get/set the current color depending on the assigned color space. */
void ShadingPatch::colorQueryFuncs (ColorGetter &getter, ColorSetter &setter) const {
switch (_colorspace) {
case Color::ColorSpace::CMYK:
getter = &Color::getCMYK;
setter = &Color::setCMYK;
break;
case Color::ColorSpace::LAB:
getter = &Color::getLab;
setter = &Color::setLab;
break;
case Color::ColorSpace::RGB:
getter = &Color::getRGB;
setter = &Color::setRGB;
break;
case Color::ColorSpace::GRAY:
getter = &Color::getGray;
setter = &Color::setGray;
}
}
/** Factory method: Creates a shading patch object depending on the given PostScript shading type. */
unique_ptr<ShadingPatch> ShadingPatch::create (int psShadingType, Color::ColorSpace cspace) {
switch (psShadingType) {
case 4: return util::make_unique<TriangularPatch>(cspace);
case 5: return util::make_unique<LatticeTriangularPatch>(cspace);
case 6: return util::make_unique<CoonsPatch>(cspace);
case 7: return util::make_unique<TensorProductPatch>(cspace);
}
ostringstream oss;
if (psShadingType > 0 && psShadingType < 4)
oss << "shading type " << psShadingType << " not supported";
else
oss << "invalid shading type " << psShadingType;
throw ShadingException(oss.str());
}
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