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[MATH] Wire up get_glyph_assembly()

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This commit is contained in:
Behdad Esfahbod 2016-09-26 21:46:05 +02:00
parent 353f455af7
commit 559eb56447
3 changed files with 81 additions and 23 deletions
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62
src/hb-ot-layout-math-table.hh
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@ -437,6 +437,8 @@ struct PartFlags : USHORT
{
enum Flags {
Extender = 0x0001u, /* If set, the part can be skipped or repeated. */
Defined = 0x0001u, /* All defined flags. */
};
public:
@ -445,14 +447,30 @@ struct PartFlags : USHORT
struct MathGlyphPartRecord
{
friend struct MathGlyphAssembly;
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
inline void extract (hb_math_glyph_part_t &out,
int scale,
hb_font_t *font) const
{
out.glyph = glyph;
out.start_connector_length = font->em_scale (startConnectorLength, scale);
out.end_connector_length = font->em_scale (endConnectorLength, scale);
out.full_advance = font->em_scale (fullAdvance, scale);
ASSERT_STATIC ((unsigned int) HB_MATH_GLYPH_PART_FLAG_EXTENDER ==
(unsigned int) PartFlags::Extender);
out.flags = (hb_math_glyph_part_flags_t)
(unsigned int)
(partFlags & PartFlags::Defined);
}
protected:
GlyphID glyph; /* Glyph ID for the part. */
USHORT startConnectorLength; /* Advance width/ height of the straight bar
@ -482,8 +500,28 @@ struct MathGlyphAssembly
partRecords.sanitize(c));
}
inline hb_position_t get_italic_correction (hb_font_t *font) const
{ return italicsCorrection.get_x_value(font, this); }
inline unsigned int get_parts (hb_direction_t direction,
hb_font_t *font,
unsigned int start_offset,
unsigned int *parts_count, /* IN/OUT */
hb_math_glyph_part_t *parts /* OUT */,
hb_position_t *italics_correction /* OUT */) const
{
if (parts_count)
{
int scale = font->dir_scale (direction);
const MathGlyphPartRecord *arr =
partRecords.sub_array (start_offset, parts_count);
unsigned int count = *parts_count;
for (unsigned int i = 0; i < count; i++)
arr[i].extract (parts[i], scale, font);
}
if (italics_correction)
*italics_correction = italicsCorrection.get_x_value (font, this);
return partRecords.len;
}
protected:
MathValueRecord italicsCorrection; /* Italics correction of this
@ -507,6 +545,9 @@ struct MathGlyphConstruction
mathGlyphVariantRecord.sanitize(c));
}
inline const MathGlyphAssembly &get_assembly (void) const
{ return this+glyphAssembly; }
inline unsigned int get_variants (hb_direction_t direction,
hb_font_t *font,
unsigned int start_offset,
@ -576,6 +617,19 @@ struct MathVariants
{ return get_glyph_construction (glyph, direction, font)
.get_variants (direction, font, start_offset, variants_count, variants); }
inline unsigned int get_glyph_parts (hb_codepoint_t glyph,
hb_direction_t direction,
hb_font_t *font,
unsigned int start_offset,
unsigned int *parts_count, /* IN/OUT */
hb_math_glyph_part_t *parts /* OUT */,
hb_position_t *italics_correction /* OUT */) const
{ return get_glyph_construction (glyph, direction, font)
.get_assembly ()
.get_parts (direction, font,
start_offset, parts_count, parts,
italics_correction); }
private:
inline const MathGlyphConstruction &
get_glyph_construction (hb_codepoint_t glyph,

16
src/hb-ot-layout.cc
View File

@ -1341,7 +1341,7 @@ hb_ot_layout_is_math_extended_shape (hb_face_t *face,
*
* Since: 1.4
**/
HB_EXTERN hb_position_t
hb_position_t
hb_ot_layout_get_math_kerning (hb_font_t *font,
hb_codepoint_t glyph,
hb_ot_math_kern_t kern,
@ -1351,7 +1351,7 @@ hb_ot_layout_get_math_kerning (hb_font_t *font,
return math.get_math_glyph_info().get_kerning (glyph, kern, correction_height, font);
}
HB_EXTERN unsigned int
unsigned int
hb_ot_layout_get_math_glyph_variants (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
@ -1374,15 +1374,19 @@ hb_ot_layout_get_math_min_connector_overlap (hb_font_t *font,
return math.get_math_variants().get_min_connector_overlap (direction, font);
}
HB_EXTERN unsigned int
hb_ot_layout_get_math_glyph_assembly_parts (hb_font_t *font,
unsigned int
hb_ot_layout_get_math_glyph_assembly (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
unsigned int start_offset,
unsigned int *parts_count, /* IN/OUT */
hb_math_glyph_part_t *parts, /* OUT */
hb_position_t *italic_correction /* OUT */)
hb_position_t *italics_correction /* OUT */)
{
const OT::MATH &math = _get_math (font->face);
return 0;
return math.get_math_variants().get_glyph_parts (glyph, direction, font,
start_offset,
parts_count,
parts,
italics_correction);
}

4
src/hb-ot-layout.h
View File

@ -341,13 +341,13 @@ hb_ot_layout_get_math_min_connector_overlap (hb_font_t *font,
hb_direction_t direction);
HB_EXTERN unsigned int
hb_ot_layout_get_math_glyph_assembly_parts (hb_font_t *font,
hb_ot_layout_get_math_glyph_assembly (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
unsigned int start_offset,
unsigned int *parts_count, /* IN/OUT */
hb_math_glyph_part_t *parts, /* OUT */
hb_position_t *italic_correction /* OUT */);
hb_position_t *italics_correction /* OUT */);
HB_END_DECLS