CTAN sync 202301120301

1 files changed, 66 insertions, 0 deletions

diff --git a/dviware/dvisvgm/src/ttf/VheaTable.cpp b/dviware/dvisvgm/src/ttf/VheaTable.cpp
new file mode 100644
index 0000000000..d49b76f523
--- /dev/null
+++ b/dviware/dvisvgm/src/ttf/VheaTable.cpp
@@ -0,0 +1,66 @@
+/*************************************************************************
+** VheaTable.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 "VheaTable.hpp"
+#include "TTFWriter.hpp"
+#include "../Font.hpp"
+
+using namespace std;
+using namespace ttf;
+
+
+void VheaTable::write (ostream &os) const {
+	const PhysicalFont &font = ttfWriter()->getFont();
+	double scale = ttfWriter()->unitsPerEmFactor();
+	writeUInt32(os, 0x10000);  // table version 1.0
+	writeInt16(os, round(font.ascent()*scale));
+	writeInt16(os, round(-font.descent()*scale));
+	writeInt16(os, 0);   // line gap, always 0
+	writeUInt16(os, _advanceHeightMax);
+	writeInt16(os, _minTopSideBearing);
+	writeInt16(os, _minBottomSideBearing);
+	writeInt16(os, _yMaxExtent);
+	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, _numberOfVMetrics);
+}
+
+
+void VheaTable::updateYMinMax (uint32_t c, int16_t ymin, int16_t ymax) {
+	const PhysicalFont &font = ttfWriter()->getFont();
+	double extend = font.style() ? font.style()->extend : 1;
+	double scale = ttfWriter()->unitsPerEmFactor();
+	int16_t advance = (c == 0 ? ymax : round(scale*extend*font.vAdvance(c)));
+	_yMaxExtent = max(_yMaxExtent, ymax);
+	_minTopSideBearing = min(_minTopSideBearing, ymin);
+	_minBottomSideBearing = min(_minBottomSideBearing, int16_t(advance-ymax));
+}
+
+
+void VheaTable::updateAdvanceHeight (uint16_t h, uint16_t numberOfVMetrics) {
+	_advanceHeightMax = max(_advanceHeightMax, h);
+	_numberOfVMetrics = numberOfVMetrics;
+}