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sna: Handle negative values when computing the stipple modulus 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-05-31 21:19:26 +01:00
parent aca994e03e
commit bc4323558b
1 changed files with 4 additions and 0 deletions
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4
src/sna/sna_accel.c
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@ -9772,6 +9772,8 @@ sna_poly_fill_rect_stippled_n_box(struct sna *sna,
for (y1 = box->y1; y1 < box->y2; y1 = y2) {
int oy = (y1 - origin->y) % gc->stipple->drawable.height;
if (oy < 0)
oy += gc->stipple->drawable.height;
y2 = box->y2;
if (y2 - y1 > gc->stipple->drawable.height - oy)
@ -9783,6 +9785,8 @@ sna_poly_fill_rect_stippled_n_box(struct sna *sna,
x2 = box->x2;
ox = (x1 - origin->x) % gc->stipple->drawable.width;
if (ox < 0)
ox += gc->stipple->drawable.width;
bx1 = ox & ~7;
bx2 = ox + (x2 - x1);
if (bx2 > gc->stipple->drawable.width) {