diff options
Diffstat (limited to 'dviware/dvisvgm/src/ttf/HheaTable.cpp')
-rw-r--r-- | dviware/dvisvgm/src/ttf/HheaTable.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/ttf/HheaTable.cpp b/dviware/dvisvgm/src/ttf/HheaTable.cpp new file mode 100644 index 0000000000..76a41d86da --- /dev/null +++ b/dviware/dvisvgm/src/ttf/HheaTable.cpp @@ -0,0 +1,67 @@ +/************************************************************************* +** HheaTable.cpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2023 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 "HheaTable.hpp" +#include "TTFWriter.hpp" +#include "../Font.hpp" + +using namespace std; +using namespace ttf; + + +void HheaTable::write (ostream &os) const { + const PhysicalFont &font = ttfWriter()->getFont(); + double scale = ttfWriter()->unitsPerEmFactor(); + writeUInt16(os, 1); // major version + writeUInt16(os, 0); // minor version + writeInt16(os, round(font.ascent()*scale)); + writeInt16(os, round(-font.descent()*scale)); + writeInt16(os, 0); // line gap + writeUInt16(os, _advanceWidthMax); + writeInt16(os, _minLeftSideBearing); + writeInt16(os, _minRightSideBearing); + writeInt16(os, _xMaxExtent); + writeInt16(os, 1); // caretSlopeRise (1 = vertical) + writeInt16(os, 0); // caretSlopeRun (0 = vertical) + writeInt16(os, 0); // caretOffset + writeInt16(os, 0); // reserved + writeInt16(os, 0); // reserved + writeInt16(os, 0); // reserved + writeInt16(os, 0); // reserved + writeInt16(os, 0); // metricDataFormat (always 0) + writeUInt16(os, _numberOfHMetrics); +} + + +void HheaTable::updateXMinMax (uint32_t c, int16_t xmin, int16_t xmax) { + const PhysicalFont &font = ttfWriter()->getFont(); + double extend = font.style() ? font.style()->extend : 1; + double scale = ttfWriter()->unitsPerEmFactor(); + int16_t advance = (c == 0 ? xmax : round(scale*extend*font.hAdvance(c))); + _xMaxExtent = max(_xMaxExtent, xmax); + _minLeftSideBearing = min(_minLeftSideBearing, xmin); + _minRightSideBearing = min(_minRightSideBearing, int16_t(advance-xmax)); +} + + +void HheaTable::updateAdvanceWidth (uint16_t w, uint16_t numberOfHMetrics) { + _advanceWidthMax = max(_advanceWidthMax, w); + _numberOfHMetrics = numberOfHMetrics; +} |