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32 lines
1013 B
32 lines
1013 B
2 years ago
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'use strict';
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// See documentation here: http://www.microsoft.com/typography/otspec/hhea.htm
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var ByteBuffer = require('microbuffer');
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function createHHeadTable(font) {
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var buf = new ByteBuffer(36); // fixed table length
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buf.writeInt32(0x10000); // version
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buf.writeInt16(font.ascent); // ascent
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buf.writeInt16(font.descent); // descend
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// Non zero lineGap causes offset in IE, https://github.com/fontello/svg2ttf/issues/37
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buf.writeInt16(0); // lineGap
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buf.writeUint16(font.maxWidth); // advanceWidthMax
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buf.writeInt16(font.minLsb); // minLeftSideBearing
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buf.writeInt16(font.minRsb); // minRightSideBearing
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buf.writeInt16(font.maxExtent); // xMaxExtent
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buf.writeInt16(1); // caretSlopeRise
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buf.writeInt16(0); // caretSlopeRun
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buf.writeUint32(0); // reserved1
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buf.writeUint32(0); // reserved2
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buf.writeUint16(0); // reserved3
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buf.writeInt16(0); // metricDataFormat
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buf.writeUint16(font.glyphs.length); // numberOfHMetrics
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return buf;
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}
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module.exports = createHHeadTable;
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