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[Vertical] GPOS x/y advance adjustments only apply in hori/vert respectively

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This commit is contained in:
Behdad Esfahbod 2011-05-20 15:59:59 -04:00
parent cc2086d67c
commit 3b0bb855e0
1 changed files with 21 additions and 10 deletions
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31
src/hb-ot-layout-gpos-private.hh
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@ -95,20 +95,26 @@ struct ValueFormat : USHORT
{ return get_len () * Value::static_size; }
void apply_value (hb_font_t *font,
hb_direction_t direction,
const void *base,
const Value *values,
hb_glyph_position_t &glyph_pos) const
{
unsigned int x_ppem, y_ppem;
unsigned int format = *this;
hb_bool_t horizontal = HB_DIRECTION_IS_HORIZONTAL (direction);
if (!format) return;
if (format & xPlacement) glyph_pos.x_offset += font->em_scale_x (get_short (values++));
if (format & yPlacement) glyph_pos.y_offset += font->em_scale_y (get_short (values++));
if (format & xAdvance) glyph_pos.x_advance += font->em_scale_x (get_short (values++));
if (format & xAdvance) {
if (likely (horizontal)) glyph_pos.x_advance += font->em_scale_x (get_short (values++)); else values++;
}
/* y_advance values grow downward but font-space grows upward, hence negation */
if (format & yAdvance) glyph_pos.y_advance -= font->em_scale_y (get_short (values++));
if (format & yAdvance) {
if (unlikely (!horizontal)) glyph_pos.y_advance -= font->em_scale_y (get_short (values++)); else values++;
}
if (!has_device ()) return;
@ -125,11 +131,11 @@ struct ValueFormat : USHORT
if (y_ppem) glyph_pos.y_offset += (base + get_device (values++)).get_y_delta (font); else values++;
}
if (format & xAdvDevice) {
if (x_ppem) glyph_pos.x_advance += (base + get_device (values++)).get_x_delta (font); else values++;
if (horizontal && x_ppem) glyph_pos.x_advance += (base + get_device (values++)).get_x_delta (font); else values++;
}
if (format & yAdvDevice) {
/* y_advance values grow downward but font-space grows upward, hence negation */
if (y_ppem) glyph_pos.y_advance -= (base + get_device (values++)).get_y_delta (font); else values++;
if (!horizontal && y_ppem) glyph_pos.y_advance -= (base + get_device (values++)).get_y_delta (font); else values++;
}
}
@ -436,7 +442,8 @@ struct SinglePosFormat1
if (likely (index == NOT_COVERED))
return false;
valueFormat.apply_value (c->font, this, values, c->buffer->pos[c->buffer->i]);
valueFormat.apply_value (c->font, c->direction, this,
values, c->buffer->pos[c->buffer->i]);
c->buffer->i++;
return true;
@ -478,7 +485,7 @@ struct SinglePosFormat2
if (likely (index >= valueCount))
return false;
valueFormat.apply_value (c->font, this,
valueFormat.apply_value (c->font, c->direction, this,
&values[index * valueFormat.get_len ()],
c->buffer->pos[c->buffer->i]);
@ -574,8 +581,10 @@ struct PairSet
{
if (c->buffer->info[pos].codepoint == record->secondGlyph)
{
valueFormats[0].apply_value (c->font, this, &record->values[0], c->buffer->pos[c->buffer->i]);
valueFormats[1].apply_value (c->font, this, &record->values[len1], c->buffer->pos[pos]);
valueFormats[0].apply_value (c->font, c->direction, this,
&record->values[0], c->buffer->pos[c->buffer->i]);
valueFormats[1].apply_value (c->font, c->direction, this,
&record->values[len1], c->buffer->pos[pos]);
if (len2)
pos++;
c->buffer->i = pos;
@ -709,8 +718,10 @@ struct PairPosFormat2
return false;
const Value *v = &values[record_len * (klass1 * class2Count + klass2)];
valueFormat1.apply_value (c->font, this, v, c->buffer->pos[c->buffer->i]);
valueFormat2.apply_value (c->font, this, v + len1, c->buffer->pos[j]);
valueFormat1.apply_value (c->font, c->direction, this,
v, c->buffer->pos[c->buffer->i]);
valueFormat2.apply_value (c->font, c->direction, this,
v + len1, c->buffer->pos[j]);
if (len2)
j++;