andreacavalli/xserver-multidpi
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EXA: Make sure tile offsets passed to drivers are never negative.

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Thanks to Björn Steinbrink for pointing out the problem on IRC.

(cherry picked from commit 006f652505 with
 modifications.)
This commit is contained in:
Michel Dänzer 2007-09-27 13:08:41 +02:00 committed by Daniel Stone
parent 732d586b09
commit 75b9dc907b
1 changed files with 4 additions and 2 deletions
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6
exa/exa_accel.c
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@ -1187,7 +1187,8 @@ exaFillRegionTiled (DrawablePtr pDrawable,
int dstY = pBox->y1;
int tileY;
tileY = (dstY - pDrawable->y - pPatOrg->y) % tileHeight;
modulus(dstY - pDrawable->y - pPatOrg->y, tileHeight, tileY);
while (height > 0) {
int width = pBox->x2 - pBox->x1;
int dstX = pBox->x1;
@ -1198,7 +1199,8 @@ exaFillRegionTiled (DrawablePtr pDrawable,
h = height;
height -= h;
tileX = (dstX - pDrawable->x - pPatOrg->x) % tileWidth;
modulus(dstX - pDrawable->x - pPatOrg->x, tileWidth, tileX);
while (width > 0) {
int w = tileWidth - tileX;
if (w > width)