alex/vello
1
0
Fork 0
mirror of https://github.com/italicsjenga/vello.git synced 2025-01-10 12:41:30 +11:00
Code Issues Packages Projects Releases Wiki Activity

backdrop: repair unsound optimization

Browse source 
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur 2020-12-24 11:41:19 +01:00
parent 8b62022749
commit ef4ec772ad
2 changed files with 4 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
piet-gpu/shader/backdrop.comp
View file

@ -54,7 +54,10 @@ void main() {
Path path = Path_read(path_ref); Path path = Path_read(path_ref);
sh_row_width[th_ix] = path.bbox.z - path.bbox.x; sh_row_width[th_ix] = path.bbox.z - path.bbox.x;
row_count = path.bbox.w - path.bbox.y; row_count = path.bbox.w - path.bbox.y;
if (row_count == 1) { // Paths that don't cross tile top edges don't have backdrops.
// Don't apply the optimization to paths that may cross the y = 0
// top edge, but clipped to 1 row.
if (row_count == 1 && path.bbox.y > 0) {
// Note: this can probably be expanded to width = 2 as // Note: this can probably be expanded to width = 2 as
// long as it doesn't cross the left edge. // long as it doesn't cross the left edge.
row_count = 0; row_count = 0;

BIN
piet-gpu/shader/backdrop.spv
View file

Binary file not shown.