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[graphite2] Fix bunch of stuff 

Based on patch from Martin Hosken, with review from Jonathan and I.
This commit is contained in:
Behdad Esfahbod 2015-07-22 14:28:25 +01:00
parent ea7f8414e3
commit 97d7c3a100
1 changed files with 54 additions and 28 deletions
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82
src/hb-graphite2.cc
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@ -228,12 +228,11 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan,
int lang_len = lang_end ? lang_end - lang : -1;
gr_feature_val *feats = gr_face_featureval_for_lang (grface, lang ? hb_tag_from_string (lang, lang_len) : 0);
while (num_features--)
for (unsigned int i = 0; i < num_features; i++)
{
const gr_feature_ref *fref = gr_face_find_fref (grface, features->tag);
const gr_feature_ref *fref = gr_face_find_fref (grface, features[i].tag);
if (fref)
gr_fref_set_feature_value (fref, features->value, feats);
features++;
gr_fref_set_feature_value (fref, features[i].value, feats);
}
gr_segment *seg = NULL;
@ -249,6 +248,8 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan,
for (unsigned int i = 0; i < buffer->len; ++i)
chars[i] = buffer->info[i].codepoint;
/* TODO ensure_native_direction. */
hb_tag_t script_tag[2];
hb_ot_tags_from_script (hb_buffer_get_script (buffer), &script_tag[0], &script_tag[1]);
@ -267,10 +268,11 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan,
if (unlikely (!glyph_count)) {
if (feats) gr_featureval_destroy (feats);
gr_seg_destroy (seg);
return false;
buffer->len = 0;
return true;
}
buffer->ensure (glyph_count);
buffer->ensure (glyph_count);
scratch = buffer->get_scratch_buffer (&scratch_size);
while ((DIV_CEIL (sizeof (hb_graphite2_cluster_t) * buffer->len, sizeof (*scratch)) +
DIV_CEIL (sizeof (hb_codepoint_t) * glyph_count, sizeof (*scratch))) > scratch_size)
@ -332,7 +334,6 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan,
}
ci++;
//buffer->clear_output ();
for (unsigned int i = 0; i < ci; ++i)
{
for (unsigned int j = 0; j < clusters[i].num_glyphs; ++j)
@ -343,32 +344,57 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan,
}
}
buffer->len = glyph_count;
//buffer->swap_buffers ();
if (HB_DIRECTION_IS_BACKWARD(buffer->props.direction))
curradvx = gr_seg_advance_X(seg);
hb_glyph_position_t *pPos;
for (pPos = hb_buffer_get_glyph_positions (buffer, NULL), is = gr_seg_first_slot (seg);
is; pPos++, is = gr_slot_next_in_segment (is))
/* Positioning. */
if (!HB_DIRECTION_IS_BACKWARD(buffer->props.direction))
{
pPos->x_offset = gr_slot_origin_X (is) - curradvx;
pPos->y_offset = gr_slot_origin_Y (is) - curradvy;
pPos->x_advance = gr_slot_advance_X (is, grface, grfont);
pPos->y_advance = gr_slot_advance_Y (is, grface, grfont);
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
curradvx -= pPos->x_advance;
pPos->x_offset = gr_slot_origin_X (is) - curradvx;
if (!HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
hb_glyph_position_t *pPos;
for (pPos = hb_buffer_get_glyph_positions (buffer, NULL), is = gr_seg_first_slot (seg);
is; pPos++, is = gr_slot_next_in_segment (is))
{
pPos->x_offset = gr_slot_origin_X (is) - curradvx;
pPos->y_offset = gr_slot_origin_Y (is) - curradvy;
pPos->x_advance = gr_slot_advance_X (is, grface, grfont);
pPos->y_advance = gr_slot_advance_Y (is, grface, grfont);
curradvx += pPos->x_advance;
pPos->y_offset = gr_slot_origin_Y (is) - curradvy;
curradvy += pPos->y_advance;
}
if (!HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
curradvy += pPos->y_advance;
}
pPos[-1].x_advance += gr_seg_advance_X(seg) - curradvx;
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
}
else
{
hb_glyph_position_t *pPos = hb_buffer_get_glyph_positions (buffer, NULL) + buffer->len - 1;
const hb_glyph_info_t *info = buffer->info + buffer->len - 1;
const hb_glyph_info_t *tinfo;
const gr_slot *tis;
int currclus = -1;
float clusx = 0., clusy = 0.;
for (is = gr_seg_last_slot (seg); is; pPos--, info--, is = gr_slot_prev_in_segment (is))
{
if (info->cluster != currclus)
{
curradvx += clusx;
curradvy += clusy;
currclus = info->cluster;
clusx = 0.;
clusy = 0.;
for (tis = is, tinfo = info; tis && tinfo->cluster == currclus; tis = gr_slot_prev_in_segment (tis), tinfo--)
{
clusx += gr_slot_advance_X (tis, grface, grfont);
clusy += gr_slot_advance_Y (tis, grface, grfont);
}
curradvx += clusx;
curradvy += clusy;
}
pPos->x_advance = gr_slot_advance_X (is, grface, grfont);
pPos->y_advance = gr_slot_advance_Y (is, grface, grfont);
curradvx -= pPos->x_advance;
curradvy -= pPos->y_advance;
pPos->x_offset = gr_slot_origin_X (is) - curradvx;
pPos->y_offset = gr_slot_origin_Y (is) - curradvy;
}
hb_buffer_reverse_clusters (buffer);
}
if (feats) gr_featureval_destroy (feats);
gr_seg_destroy (seg);