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Diffstat (limited to 'dviware/dvisvgm/src/ttf/HheaTable.cpp')
-rw-r--r--dviware/dvisvgm/src/ttf/HheaTable.cpp67
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
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+++ 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;
+}