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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/Bitmap.hpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/Bitmap.hpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/Bitmap.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/Bitmap.hpp new file mode 100644 index 00000000000..30c29cf5f16 --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/Bitmap.hpp @@ -0,0 +1,111 @@ +/************************************************************************* +** Bitmap.hpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2017 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 BITMAP_HPP +#define BITMAP_HPP + +#include <ostream> +#include <vector> + + +class Bitmap +{ + public: + struct Callback { + virtual ~Callback() =default; + virtual void pixel (int x, int y, bool set, Bitmap &bm) {} + virtual void pixel (int x, int y, bool set, const Bitmap &bm) {} + virtual void finish () {} + }; + + public: + Bitmap (); + Bitmap (int minx, int maxx, int miny , int maxy); + void resize (int minx, int maxx, int miny , int maxy); + void setBits(int row, int col, int n); + const uint8_t* rowPtr (int row) const {return &_bytes[row*_bpr];} + int height () const {return _rows;} + int width () const {return _cols;} + int xshift () const {return _xshift;} + int yshift () const {return _yshift;} + int bytesPerRow () const {return _bpr;} + bool empty () const {return (!_rows && !_cols) || _bytes.empty();} + bool getBBox (int &minx, int &miny, int &maxx, int &maxy) const; + void getExtent (int &w, int &h) const; + void forAllPixels (Callback &callback) const; + + template <typename T> + int copy (std::vector<T> &target, bool vflip=false) const; + +// template <typename T> +// void write (std::ostream &os, const std::vector<T> &v) const; + +// std::ostream& write (std::ostream &os) const; + + private: + int _rows, _cols; ///< number of rows, columns + int _xshift, _yshift; ///< horizontal/vertical shift + int _bpr; ///< number of bytes per row + std::vector<uint8_t> _bytes; +}; + + +/** Copies the bitmap to a new target area and reorganizes the bits. + * @tparam T component type of target vector + * @param[out] target points to first T of new bitmap (must be deleted after usage) + * @param[in] vflip true if the new bitmap should be flipped vertically + * @return number of Ts per row */ +template <typename T> +int Bitmap::copy (std::vector<T> &target, bool vflip) const { + const int s = sizeof(T); + const int tpr = _bpr/s + (_bpr%s ? 1 : 0); // number of Ts per row + target.resize(_rows*tpr); + for (int r=0; r < _rows; r++) { + int targetrow = vflip ? _rows-r-1 : r; + for (int b=0; b < _bpr; b++) { + T &t = target[targetrow*tpr + b/s]; + T chunk = (T)_bytes[r*_bpr+b] << (8*(s-1-b%s)); + if (b % s == 0) + t = chunk; + else + t |= chunk; + } + } + return tpr; +} + + +/* +template <typename T> +void Bitmap::write (std::ostream &os, const std::vector<T> &v) const { + const int s = sizeof(T); + const int tpr = _bpr/s + (_bpr%s ? 1 : 0); // number of Ts per row + for (int r=_rows-1; r >= 0; r--) { + for (int t=0; t < tpr; t++) { + for (T b=(T)1<<(8*s-1); b; b>>=1) + os << ((v[r*tpr+t] & b) ? '*' : '-'); + os << ' '; + } + os << std::endl; + } +}*/ + + +#endif |