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hhea - Horizontal Header
This table contains information for horizontal layout. The values in the minRightSidebearing, minLeftSideBearing and xMaxExtent should be computed using only glyphs that have contours. Glyphs with no contours should be ignored for the purposes of these calculations. All reserved areas must be set to 0.
| Type |
Name |
Description |
| Fixed |
Table version number |
0x00010000 for version 1.0. |
| FWord |
Ascender |
Typographic ascent. 1 |
| FWord |
Descender |
Typographic descent. 1 |
| FWord |
LineGap |
Typographic line gap. 1
Negative LineGap values are treated as zero
in Windows 3.1, System 6, and
System 7. |
| uFWord |
advanceWidthMax |
Maximum advance width value in 'hmtx' table. |
| FWord |
minLeftSideBearing |
Minimum left sidebearing value in 'hmtx' table. |
| FWord |
minRightSideBearing |
Minimum right sidebearing value; calculated as Min(aw - lsb - (xMax - xMin)). |
| FWord |
xMaxExtent |
Max(lsb + (xMax - xMin)). |
| SHORT |
caretSlopeRise |
Used to calculate the slope of the cursor (rise/run); 1 for vertical. |
| SHORT |
caretSlopeRun |
0 for vertical. |
| SHORT |
caretOffset |
The amount by which a slanted highlight on a glyph needs to be shifted to produce the best appearance. Set to 0 for non-slanted fonts |
| SHORT |
(reserved) |
set to 0 |
| SHORT |
(reserved) |
set to 0 |
| SHORT |
(reserved) |
set to 0 |
| SHORT |
(reserved) |
set to 0 |
| SHORT |
metricDataFormat |
0 for current format. |
| USHORT |
numberOfHMetrics |
Number of hMetric entries in 'hmtx' table |
1 The ascender, descender and linegap values in this table are Macintosh-specific. Also see information in the OS/2 table.
this page was last updated 22 March 2001
© 2001 Microsoft Corporation. All rights reserved. Terms of use.
comments to the MST group:
ttwsite@microsoft.com
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