diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/src/ShadingPatch.hpp |
Initial commit
Diffstat (limited to 'dviware/dvisvgm/src/ShadingPatch.hpp')
-rw-r--r-- | dviware/dvisvgm/src/ShadingPatch.hpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/ShadingPatch.hpp b/dviware/dvisvgm/src/ShadingPatch.hpp new file mode 100644 index 0000000000..a39edc5100 --- /dev/null +++ b/dviware/dvisvgm/src/ShadingPatch.hpp @@ -0,0 +1,70 @@ +/************************************************************************* +** ShadingPatch.hpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2019 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/>. ** +*************************************************************************/ + +#ifndef SHADINGPATCH_HPP +#define SHADINGPATCH_HPP + +#include <memory> +#include "Color.hpp" +#include "GraphicsPath.hpp" +#include "MessageException.hpp" + + +class ShadingPatch { + public: + struct Callback { + virtual ~Callback () =default; + virtual void patchSegment (GraphicsPath<double> &path, const Color &color) =0; + }; + + using PointVec = std::vector<DPair>; + using ColorVec = std::vector<Color>; + + public: + explicit ShadingPatch (Color::ColorSpace colorSpace) : _colorspace(colorSpace) {} + virtual ~ShadingPatch () =default; + virtual int psShadingType () const =0; + virtual void approximate (int gridsize, bool overlap, double delta, Callback &callback) const =0; + virtual void getBBox (BoundingBox &bbox) const =0; + virtual void getBoundaryPath (GraphicsPath<double> &path) const =0; + virtual void setPoints (const PointVec &points, int edgeflag, ShadingPatch *patch) =0; + virtual void setColors (const ColorVec &colors, int edgeflag, ShadingPatch *patch) =0; + virtual int numPoints (int edgeflag) const =0; + virtual int numColors (int edgeflag) const =0; + virtual Color averageColor() const =0; + Color::ColorSpace colorSpace () const {return _colorspace;} + static std::unique_ptr<ShadingPatch> create (int psShadingType, Color::ColorSpace cspace); + + protected: + using ColorGetter = void (Color::*)(std::valarray<double> &va) const; + using ColorSetter = void (Color::*)(const std::valarray<double> &va); + void colorQueryFuncs (ColorGetter &getter, ColorSetter &setter) const; + + private: + Color::ColorSpace _colorspace; ///< color space used to compute the shading values +}; + + +struct ShadingException : public MessageException { + explicit ShadingException (const std::string &msg) : MessageException(msg) {} +}; + +#endif + |