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[paint-extents] More

This commit is contained in:
Behdad Esfahbod 2022-12-23 15:10:26 -07:00
parent d7435b1009
commit 23a2d4dbab
1 changed files with 29 additions and 1 deletions
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30
src/hb-paint-extents.hh
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@ -132,7 +132,35 @@ struct hb_paint_extents_context_t {
void paint ()
{
/* Union current clip bounds with current bounds. */
/* Union current clip bounds with current group bounds. */
const hb_bounds_t &clip = clips.tail ();
hb_bounds_t &group = groups.tail ();
if (clip.status == hb_bounds_t::status_t::EMPTY)
return; // Shouldn't happen
if (group.status == hb_bounds_t::status_t::UNBOUNDED)
return;
if (group.status == hb_bounds_t::status_t::EMPTY)
{
group = clip;
return;
}
/* Group is bounded now. Clip is not empty. */
if (clip.status == hb_bounds_t::status_t::UNBOUNDED)
{
group.status = hb_bounds_t::status_t::UNBOUNDED;
return;
}
/* Both are bounded. Union. */
group.extents.xmin = hb_min (group.extents.xmin, clip.extents.xmin);
group.extents.ymin = hb_min (group.extents.ymin, clip.extents.ymin);
group.extents.xmax = hb_max (group.extents.xmax, clip.extents.xmax);
group.extents.ymax = hb_max (group.extents.ymax, clip.extents.ymax);
}
hb_vector_t<hb_bounds_t> clips;