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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/GFTracer.cpp')
| -rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/GFTracer.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/GFTracer.cpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/GFTracer.cpp new file mode 100644 index 00000000000..e071e93e1f6 --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/GFTracer.cpp @@ -0,0 +1,103 @@ +/************************************************************************* +** GFTracer.cpp ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2015 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 <config.h> +#include <iostream> +#include <fstream> +#include <sstream> +#include "GFTracer.h" +#include "Glyph.h" +#include "Message.h" + +#ifdef __MSVC__ +#include <potracelib.h> +#else +extern "C" { +#include <potracelib.h> +} +#endif + +using namespace std; + + +GFTracer::GFTracer (istream &is) + : GFReader(is), _unitsPerPoint(0.0) +{ +} + + +/** Constructs a new GFTracer. + * @param[in] is GF file is read from this stream + * @param[in] upp target units per PS point */ +GFTracer::GFTracer (istream &is, double upp) + : GFReader(is), _unitsPerPoint(upp) +{ +} + + +void GFTracer::beginChar (UInt32 c) { +} + + +void GFTracer::endChar (UInt32 c) { + const Bitmap &bitmap = getBitmap(); + if (bitmap.empty()) + return; + + // prepare potrace's bitmap structure + vector<potrace_word> buffer; + potrace_bitmap_t pobitmap; + pobitmap.w = bitmap.width(); + pobitmap.h = bitmap.height(); + pobitmap.dy = bitmap.copy(buffer); + pobitmap.map = &buffer[0]; + potrace_param_t *param = potrace_param_default(); + potrace_state_t *state = potrace_trace(param, &pobitmap); + potrace_param_free(param); + + if (!state || state->status == POTRACE_STATUS_INCOMPLETE) + Message::wstream(true) << "error while tracing character\n"; + else { + double hsf=1.0, vsf=1.0; // horizontal a d vertical scale factor + if (_unitsPerPoint != 0.0) { + hsf = _unitsPerPoint/getHPixelsPerPoint(); // horizontal scale factor + vsf = _unitsPerPoint/getVPixelsPerPoint(); // vertical scale factor + } + for (potrace_path_t *path = state->plist; path; path = path->next) { + potrace_dpoint_t &p = path->curve.c[path->curve.n-1][2]; // start/end point + moveTo(hsf*(p.x+bitmap.xshift()), vsf*(p.y+bitmap.yshift())); + for (int i=0; i < path->curve.n; i++) { + if (path->curve.tag[i] == POTRACE_CURVETO) { + curveTo(hsf*(path->curve.c[i][0].x+bitmap.xshift()), vsf*(path->curve.c[i][0].y+bitmap.yshift()), + hsf*(path->curve.c[i][1].x+bitmap.xshift()), vsf*(path->curve.c[i][1].y+bitmap.yshift()), + hsf*(path->curve.c[i][2].x+bitmap.xshift()), vsf*(path->curve.c[i][2].y+bitmap.yshift())); + } + else { + lineTo(hsf*(path->curve.c[i][1].x+bitmap.xshift()), vsf*(path->curve.c[i][1].y+bitmap.yshift())); + if (i == path->curve.n-1) + closePath(); + else + lineTo(hsf*(path->curve.c[i][2].x+bitmap.xshift()), vsf*(path->curve.c[i][2].y+bitmap.yshift())); + } + } + } + } + potrace_state_free(state); +} |