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Document API for MathVariants (#330)

This commit is contained in:
Frédéric Wang 2016-09-27 15:28:35 +02:00 committed by Behdad Esfahbod
parent 8d622f1114
commit 0762b35474
1 changed files with 56 additions and 0 deletions
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56
src/hb-ot-layout.cc
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@ -1352,6 +1352,26 @@ hb_ot_math_get_glyph_kerning (hb_font_t *font,
return math.get_math_glyph_info().get_kerning (glyph, kern, correction_height, font);
}
/**
* hb_ot_math_get_glyph_variants:
*
* @font: #hb_font_t from which to retrieve the values
* @glyph: index of the glyph to stretch
* @direction: direction of the stretching
* @start_offset: offset of the first variant to retrieve
* @variants_count: maximum number of variants to retrieve after start_offset
* (IN) and actual number of variants retrieved (OUT)
* @variants: array of size at least @variants_count to store the result
*
* This function tries to retrieve the MathGlyphConstruction for the specified
* font, glyph and direction. Note that only the value of
* #HB_DIRECTION_IS_HORIZONTAL is considered. It provides the corresponding list
* of size variants as an array of hb_math_glyph_variant_t structs.
*
* Return value: the total number of size variants available or 0
*
* Since: 1.4
**/
unsigned int
hb_ot_math_get_glyph_variants (hb_font_t *font,
hb_codepoint_t glyph,
@ -1367,6 +1387,21 @@ hb_ot_math_get_glyph_variants (hb_font_t *font,
variants);
}
/**
* hb_ot_math_get_min_connector_overlap:
*
* @font: #hb_font_t from which to retrieve the value
* @direction: direction of the stretching
*
* This function tries to retrieve the MathVariants table for the specified
* font and returns the minimum overlap of connecting glyphs to draw a glyph
* assembly in the specified direction. Note that only the value of
* #HB_DIRECTION_IS_HORIZONTAL is considered.
*
* Return value: requested min connector overlap or 0
*
* Since: 1.4
**/
hb_position_t
hb_ot_math_get_min_connector_overlap (hb_font_t *font,
hb_direction_t direction)
@ -1375,6 +1410,27 @@ hb_ot_math_get_min_connector_overlap (hb_font_t *font,
return math.get_math_variants().get_min_connector_overlap (direction, font);
}
/**
* hb_ot_math_get_glyph_assembly:
*
* @font: #hb_font_t from which to retrieve the values
* @glyph: index of the glyph to stretch
* @direction: direction of the stretching
* @start_offset: offset of the first glyph part to retrieve
* @parts_count: maximum number of glyph parts to retrieve after start_offset
* (IN) and actual number of parts retrieved (OUT)
* @parts: array of size at least @parts_count to store the result
* @italics_correction: italic correction of the glyph assembly
*
* This function tries to retrieve the GlyphAssembly for the specified font,
* glyph and direction. Note that only the value of #HB_DIRECTION_IS_HORIZONTAL
* is considered. It provides the information necessary to draw the glyph
* assembly as an array of #hb_math_glyph_part_t.
*
* Return value: the total number of parts in the glyph assembly
*
* Since: 1.4
**/
unsigned int
hb_ot_math_get_glyph_assembly (hb_font_t *font,
hb_codepoint_t glyph,