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. |
| FWord | Descender | Typographic descent. |
| FWord | LineGap | Typographic line gap. 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 | (reserved) | set to 0 |
| 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; must be equal to the CharStrings INDEX count in the 'CFF ' table. |