{ 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;
- /* design units -> fractional pixel */
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 & yAdvance) glyph_pos.y_advance += font->em_scale_y (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) {
+ if (unlikely (!horizontal)) glyph_pos.y_advance -= font->em_scale_y (get_short (values++)); else values++;
+ }
if (!has_device ()) return;
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) {
- if (y_ppem) glyph_pos.y_advance += (base + get_device (values++)).get_y_delta (font); else values++;
+ /* y_advance values grow downward but font-space grows upward, hence negation */
+ if (!horizontal && y_ppem) glyph_pos.y_advance -= (base + get_device (values++)).get_y_delta (font); else values++;
}
}
private:
inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id HB_UNUSED,
- hb_direction_t direction HB_UNUSED,
hb_position_t *x, hb_position_t *y) const
{
*x = font->em_scale_x (xCoordinate);
private:
inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id,
- hb_direction_t direction,
hb_position_t *x, hb_position_t *y) const
{
unsigned int x_ppem = font->x_ppem;
hb_bool_t ret = false;
if (x_ppem || y_ppem)
- ret = hb_font_get_contour_point_for_direction (font, glyph_id, anchorPoint, direction, &cx, &cy);
+ ret = hb_font_get_glyph_contour_point_for_origin (font, glyph_id, anchorPoint, HB_DIRECTION_LTR, &cx, &cy);
*x = x_ppem && ret ? cx : font->em_scale_x (xCoordinate);
*y = y_ppem && ret ? cy : font->em_scale_y (yCoordinate);
}
private:
inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id HB_UNUSED,
- hb_direction_t direction HB_UNUSED,
hb_position_t *x, hb_position_t *y) const
{
*x = font->em_scale_x (xCoordinate);
*y = font->em_scale_y (yCoordinate);
- /* pixel -> fractional pixel */
if (font->x_ppem)
*x += (this+xDeviceTable).get_x_delta (font);
if (font->y_ppem)
struct Anchor
{
inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id,
- hb_direction_t direction,
hb_position_t *x, hb_position_t *y) const
{
*x = *y = 0;
switch (u.format) {
- case 1: u.format1.get_anchor (font, glyph_id, direction, x, y); return;
- case 2: u.format2.get_anchor (font, glyph_id, direction, x, y); return;
- case 3: u.format3.get_anchor (font, glyph_id, direction, x, y); return;
- default: return;
+ case 1: u.format1.get_anchor (font, glyph_id, x, y); return;
+ case 2: u.format2.get_anchor (font, glyph_id, x, y); return;
+ case 3: u.format3.get_anchor (font, glyph_id, x, y); return;
+ default: return;
}
}
hb_position_t mark_x, mark_y, base_x, base_y;
- mark_anchor.get_anchor (c->font, c->buffer->info[c->buffer->i].codepoint, c->direction, &mark_x, &mark_y);
- glyph_anchor.get_anchor (c->font, c->buffer->info[glyph_pos].codepoint, c->direction, &base_x, &base_y);
+ mark_anchor.get_anchor (c->font, c->buffer->info[c->buffer->i].codepoint, &mark_x, &mark_y);
+ glyph_anchor.get_anchor (c->font, c->buffer->info[glyph_pos].codepoint, &base_x, &base_y);
hb_glyph_position_t &o = c->buffer->pos[c->buffer->i];
o.x_offset = base_x - mark_x;
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;
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]);
{
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;
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++;
unsigned int i = c->buffer->i;
hb_position_t entry_x, entry_y, exit_x, exit_y;
- (this+this_record.exitAnchor).get_anchor (c->font, c->buffer->info[i].codepoint, c->direction, &exit_x, &exit_y);
- (this+next_record.entryAnchor).get_anchor (c->font, c->buffer->info[j].codepoint, c->direction, &entry_x, &entry_y);
-
- /* Align the exit anchor of the left/top glyph with the entry anchor of the right/bottom glyph
- * by adjusting advance of the left/top glyph. */
- if (HB_DIRECTION_IS_BACKWARD (c->direction))
- {
- if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
- c->buffer->pos[j].x_advance = c->buffer->pos[j].x_offset + entry_x - exit_x;
- else
- c->buffer->pos[j].y_advance = c->buffer->pos[j].y_offset + entry_y - exit_y;
- }
- else
- {
- if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
- c->buffer->pos[i].x_advance = c->buffer->pos[i].x_offset + exit_x - entry_x;
- else
- c->buffer->pos[i].y_advance = c->buffer->pos[i].y_offset + exit_y - entry_y;
+ (this+this_record.exitAnchor).get_anchor (c->font, c->buffer->info[i].codepoint, &exit_x, &exit_y);
+ (this+next_record.entryAnchor).get_anchor (c->font, c->buffer->info[j].codepoint, &entry_x, &entry_y);
+
+ hb_glyph_position_t *pos = c->buffer->pos;
+
+ hb_position_t d;
+ /* Main-direction adjustment */
+ switch (c->direction) {
+ case HB_DIRECTION_LTR:
+ pos[i].x_advance = exit_x + pos[i].x_offset;
+
+ d = entry_x + pos[j].x_offset;
+ pos[j].x_advance -= d;
+ pos[j].x_offset -= d;
+ break;
+ case HB_DIRECTION_RTL:
+ d = exit_x + pos[i].x_offset;
+ pos[i].x_advance -= d;
+ pos[i].x_offset -= d;
+
+ pos[j].x_advance = entry_x + pos[j].x_offset;
+ break;
+ case HB_DIRECTION_TTB:
+ pos[i].y_advance = exit_y + pos[i].y_offset;
+
+ d = entry_y + pos[j].y_offset;
+ pos[j].y_advance -= d;
+ pos[j].y_offset -= d;
+ break;
+ case HB_DIRECTION_BTT:
+ d = exit_y + pos[i].y_offset;
+ pos[i].y_advance -= d;
+ pos[i].y_offset -= d;
+
+ pos[j].y_advance = entry_y;
+ break;
+ case HB_DIRECTION_INVALID:
+ default:
+ break;
}
- if (c->lookup_props & LookupFlag::RightToLeft)
- {
- c->buffer->pos[i].cursive_chain() = j - i;
+ /* Cross-direction adjustment */
+ if (c->lookup_props & LookupFlag::RightToLeft) {
+ pos[i].cursive_chain() = j - i;
if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
- c->buffer->pos[i].y_offset = entry_y - exit_y;
+ pos[i].y_offset = entry_y - exit_y;
else
- c->buffer->pos[i].x_offset = entry_x - exit_x;
- }
- else
- {
- c->buffer->pos[j].cursive_chain() = i - j;
+ pos[i].x_offset = entry_x - exit_x;
+ } else {
+ pos[j].cursive_chain() = i - j;
if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
- c->buffer->pos[j].y_offset = exit_y - entry_y;
+ pos[j].y_offset = exit_y - entry_y;
else
- c->buffer->pos[j].x_offset = exit_x - entry_x;
+ pos[j].x_offset = exit_x - entry_x;
}
c->buffer->i = j;
DEFINE_SIZE_STATIC (10);
};
+
+static void
+fix_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
+{
+ unsigned int j = pos[i].cursive_chain();
+ if (likely (!j))
+ return;
+
+ j += i;
+
+ pos[i].cursive_chain() = 0;
+
+ fix_cursive_minor_offset (pos, j, direction);
+
+ if (HB_DIRECTION_IS_HORIZONTAL (direction))
+ pos[i].y_offset += pos[j].y_offset;
+ else
+ pos[i].x_offset += pos[j].x_offset;
+}
+
+static void
+fix_mark_attachment (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
+{
+ if (likely (!(pos[i].attach_lookback())))
+ return;
+
+ unsigned int j = i - pos[i].attach_lookback();
+
+ pos[i].x_advance = 0;
+ pos[i].y_advance = 0;
+ pos[i].x_offset += pos[j].x_offset;
+ pos[i].y_offset += pos[j].y_offset;
+
+ if (HB_DIRECTION_IS_FORWARD (direction))
+ for (unsigned int k = j; k < i; k++) {
+ pos[i].x_offset -= pos[k].x_advance;
+ pos[i].y_offset -= pos[k].y_advance;
+ }
+ else
+ for (unsigned int k = j + 1; k < i + 1; k++) {
+ pos[i].x_offset += pos[k].x_advance;
+ pos[i].y_offset += pos[k].y_advance;
+ }
+}
+
void
GPOS::position_finish (hb_buffer_t *buffer)
{
- unsigned int i, j;
unsigned int len;
hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, &len);
hb_direction_t direction = buffer->props.direction;
- /* Handle cursive connections:
- * First handle all chain-back connections, then handle all chain-forward connections. */
- if (likely (HB_DIRECTION_IS_HORIZONTAL (direction)))
+ /* Handle cursive connections */
+ for (unsigned int i = 0; i < len; i++)
{
- for (j = 0; j < len; j++) {
- if (pos[j].cursive_chain() < 0)
- pos[j].y_offset += pos[j + pos[j].cursive_chain()].y_offset;
- }
- for (i = len; i > 0; i--) {
- j = i - 1;
- if (pos[j].cursive_chain() > 0)
- pos[j].y_offset += pos[j + pos[j].cursive_chain()].y_offset;
- }
+ fix_cursive_minor_offset (pos, i, direction);
}
- else
- {
- for (j = 0; j < len; j++) {
- if (pos[j].cursive_chain() < 0)
- pos[j].x_offset += pos[j + pos[j].cursive_chain()].x_offset;
- }
- for (i = len; i > 0; i--) {
- j = i - 1;
- if (pos[j].cursive_chain() > 0)
- pos[j].x_offset += pos[j + pos[j].cursive_chain()].x_offset;
- }
- }
-
/* Handle attachments */
- for (i = 0; i < len; i++)
- if (pos[i].attach_lookback())
- {
- unsigned int back = i - pos[i].attach_lookback();
- pos[i].x_offset += pos[back].x_offset;
- pos[i].y_offset += pos[back].y_offset;
-
- if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
- for (j = back + 1; j < i + 1; j++) {
- pos[i].x_offset += pos[j].x_advance;
- pos[i].y_offset += pos[j].y_advance;
- }
- else
- for (j = back; j < i; j++) {
- pos[i].x_offset -= pos[j].x_advance;
- pos[i].y_offset -= pos[j].y_advance;
- }
- }
+ for (unsigned int i = 0; i < len; i++)
+ {
+ fix_mark_attachment (pos, i, direction);
+ }
}
projects / framework / uifw / harfbuzz.git / blobdiff