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[metrics] Expose raw OS2/HHEA asc/dsc values using private tags (#1867)

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Ebrahim Byagowi 2019-07-26 16:46:04 +04:30 committed by GitHub
parent aaffe41094
commit d3d99f8bb6
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1 changed files with 16 additions and 0 deletions
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16
src/hb-ot-metrics.cc
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@ -100,6 +100,14 @@ _get_gasp (hb_face_t *face, float *result, hb_ot_metrics_t metrics_tag)
}
#endif
/* Private tags for https://github.com/harfbuzz/harfbuzz/issues/1866 */
#define _HB_OT_METRICS_HORIZONTAL_ASCENDER_OS2 HB_TAG ('O','a','s','c')
#define _HB_OT_METRICS_HORIZONTAL_ASCENDER_HHEA HB_TAG ('H','a','s','c')
#define _HB_OT_METRICS_HORIZONTAL_DESCENDER_OS2 HB_TAG ('O','d','s','c')
#define _HB_OT_METRICS_HORIZONTAL_DESCENDER_HHEA HB_TAG ('H','d','s','c')
#define _HB_OT_METRICS_HORIZONTAL_LINE_GAP_OS2 HB_TAG ('O','l','g','p')
#define _HB_OT_METRICS_HORIZONTAL_LINE_GAP_HHEA HB_TAG ('H','l','g','p')
/**
* hb_ot_metrics_get_position:
* @font: a #hb_font_t object.
@ -158,6 +166,14 @@ hb_ot_metrics_get_position (hb_font_t *font,
case HB_OT_METRICS_STRIKEOUT_OFFSET: return GET_METRIC_Y (OS2, yStrikeoutPosition);
case HB_OT_METRICS_UNDERLINE_SIZE: return GET_METRIC_Y (post->table, underlineThickness);
case HB_OT_METRICS_UNDERLINE_OFFSET: return GET_METRIC_Y (post->table, underlinePosition);
/* Private tags */
case _HB_OT_METRICS_HORIZONTAL_ASCENDER_OS2: return GET_METRIC_Y (OS2, sTypoAscender);
case _HB_OT_METRICS_HORIZONTAL_ASCENDER_HHEA: return GET_METRIC_Y (hhea, ascender);
case _HB_OT_METRICS_HORIZONTAL_DESCENDER_OS2: return GET_METRIC_Y (OS2, sTypoDescender);
case _HB_OT_METRICS_HORIZONTAL_DESCENDER_HHEA: return GET_METRIC_Y (hhea, descender);
case _HB_OT_METRICS_HORIZONTAL_LINE_GAP_OS2: return GET_METRIC_Y (OS2, sTypoLineGap);
case _HB_OT_METRICS_HORIZONTAL_LINE_GAP_HHEA: return GET_METRIC_Y (hhea, lineGap);
#undef GET_METRIC_Y
#undef GET_METRIC_X
#undef GET_VAR