diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-27 15:21:42 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-27 15:29:36 +0100 |
| commit | 797441093a8346003552e0cf89aef2a644ff53ab (patch) | |
| tree | e80f529603ec322a2c08a9c65ff78c7b32a8c3da | |
| parent | cabb3c3bdf3153719b0ee538ea1b66137dc89085 (diff) | |
tor: Fudge the edge if it is projected into a point
If we generate an edge (through polygon-intersect) where its end-points
lie outside the line definition then it is possible for that line to be
degenerate under sample grid projection. Apply a fudge factor to prevent
explosions as otherwise we reject an edge whose height is not strictly
0.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54822
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | src/cairo-tor-scan-converter.c | 2 | ||||
| -rw-r--r-- | src/cairo-tor22-scan-converter.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/src/cairo-tor-scan-converter.c b/src/cairo-tor-scan-converter.c index 823326064..89ef20f09 100644 --- a/src/cairo-tor-scan-converter.c +++ b/src/cairo-tor-scan-converter.c @@ -1506,7 +1506,7 @@ glitter_scan_converter_add_edge (glitter_scan_converter_t *converter, INPUT_TO_GRID_Y (edge->line.p1.y, e.line.p1.y); INPUT_TO_GRID_Y (edge->line.p2.y, e.line.p2.y); if (e.line.p1.y == e.line.p2.y) - return; + e.line.p2.y++; /* little fudge to prevent a div-by-zero */ INPUT_TO_GRID_X (edge->line.p1.x, e.line.p1.x); INPUT_TO_GRID_X (edge->line.p2.x, e.line.p2.x); diff --git a/src/cairo-tor22-scan-converter.c b/src/cairo-tor22-scan-converter.c index b4cdd6ce5..4cec5ee4f 100644 --- a/src/cairo-tor22-scan-converter.c +++ b/src/cairo-tor22-scan-converter.c @@ -1362,7 +1362,7 @@ glitter_scan_converter_add_edge (glitter_scan_converter_t *converter, INPUT_TO_GRID_Y (edge->line.p1.y, e.line.p1.y); INPUT_TO_GRID_Y (edge->line.p2.y, e.line.p2.y); if (e.line.p1.y == e.line.p2.y) - return; + e.line.p2.y++; /* Fudge to prevent div-by-zero */ INPUT_TO_GRID_X (edge->line.p1.x, e.line.p1.x); INPUT_TO_GRID_X (edge->line.p2.x, e.line.p2.x); |