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EXA: Make sure tile offsets passed to drivers are never negative. 

Thanks to Björn Steinbrink for pointing out the problem on IRC.
This commit is contained in:
Michel Dänzer 2007-09-27 13:08:41 +02:00
parent da7d9aa1fb
commit 006f652505
1 changed files with 5 additions and 2 deletions
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7
exa/exa_accel.c
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@ -1239,7 +1239,8 @@ exaFillRegionTiled (DrawablePtr pDrawable,
int dstY = pBox->y1;
int tileY;
tileY = (dstY - yoff - pDrawable->y - pPatOrg->y) % tileHeight;
modulus(dstY - yoff - pDrawable->y - pPatOrg->y, tileHeight, tileY);
while (height > 0) {
int width = pBox->x2 - pBox->x1;
int dstX = pBox->x1;
@ -1250,7 +1251,9 @@ exaFillRegionTiled (DrawablePtr pDrawable,
h = height;
height -= h;
tileX = (dstX - xoff - pDrawable->x - pPatOrg->x) % tileWidth;
modulus(dstX - xoff - pDrawable->x - pPatOrg->x, tileWidth,
tileX);
while (width > 0) {
int w = tileWidth - tileX;
if (w > width)