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glx: Do not access stage_clip without checking it

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The stage_clip parameter for add_redraw_clip() can be NULL, so we need
to check before accessing its members.
This commit is contained in:
Emmanuele Bassi 2010-03-19 11:39:23 +00:00
parent 913c187f4e
commit a39cef41b8
1 changed files with 4 additions and 3 deletions
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7
clutter/glx/clutter-stage-glx.c
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@ -377,14 +377,15 @@ clutter_stage_glx_add_redraw_clip (ClutterStageWindow *stage_window,
if (clutter_stage_glx_ignoring_redraw_clips (stage_window)) if (clutter_stage_glx_ignoring_redraw_clips (stage_window))
return; return;
/* Do nothing on an empty clip, to avoid confusing with the flag degenerate clip */ /* Do nothing on an empty clip, to avoid confusing with the flag degenerate
if (stage_clip->width == 0) * clip */
if (stage_clip != NULL && stage_clip->width == 0)
return; return;
/* A NULL stage clip means a full stage redraw has been queued and /* A NULL stage clip means a full stage redraw has been queued and
* we keep track of this by setting a degenerate * we keep track of this by setting a degenerate
* stage_glx->bounding_redraw_clip */ * stage_glx->bounding_redraw_clip */
if (!stage_clip) if (stage_clip == NULL)
{ {
stage_glx->bounding_redraw_clip.width = 0; stage_glx->bounding_redraw_clip.width = 0;
return; return;