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Fix _glamor_set_spans() bug (re-used 'n' variable)

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n was used as a function parameter.  But inside the for (i=1..n) loop,
n got reassigned as REGION_NUM_RECTS() and then decremented to zero by
the while loop.  This caused the for loop to only iterate once instead
of 'n' times.

This patch renames the n parameter to numPoints.

Found by code inspection.  Untested.

Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>
This commit is contained in:
Brian Paul 2013-10-19 16:10:52 -06:00 committed by Eric Anholt
parent 2f62bd46cc
commit 3bf1eb577e
1 changed files with 4 additions and 4 deletions
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8
glamor/glamor_setspans.c
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@ -30,7 +30,7 @@
static Bool static Bool
_glamor_set_spans(DrawablePtr drawable, GCPtr gc, char *src, _glamor_set_spans(DrawablePtr drawable, GCPtr gc, char *src,
DDXPointPtr points, int *widths, int n, int sorted, DDXPointPtr points, int *widths, int numPoints, int sorted,
Bool fallback) Bool fallback)
{ {
PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(drawable); PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(drawable);
@ -53,9 +53,9 @@ _glamor_set_spans(DrawablePtr drawable, GCPtr gc, char *src,
goto fail; goto fail;
glamor_get_drawable_deltas(drawable, dest_pixmap, &x_off, &y_off); glamor_get_drawable_deltas(drawable, dest_pixmap, &x_off, &y_off);
for (i = 0; i < n; i++) { for (i = 0; i < numPoints; i++) {
n = REGION_NUM_RECTS(clip); int n = REGION_NUM_RECTS(clip);
pbox = REGION_RECTS(clip); pbox = REGION_RECTS(clip);
while (n--) { while (n--) {
int x1 = points[i].x; int x1 = points[i].x;
@ -85,7 +85,7 @@ fail:
glamor_fallback("to %p (%c)\n", glamor_fallback("to %p (%c)\n",
drawable, glamor_get_drawable_location(drawable)); drawable, glamor_get_drawable_location(drawable));
if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW)) { if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW)) {
fbSetSpans(drawable, gc, src, points, widths, n, sorted); fbSetSpans(drawable, gc, src, points, widths, numPoints, sorted);
glamor_finish_access(drawable, GLAMOR_ACCESS_RW); glamor_finish_access(drawable, GLAMOR_ACCESS_RW);
} }
ret = TRUE; ret = TRUE;