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-rw-r--r--common/gl_canvas.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/common/gl_canvas.c b/common/gl_canvas.c
index 2adc986..0736a08 100644
--- a/common/gl_canvas.c
+++ b/common/gl_canvas.c
@@ -207,7 +207,8 @@ static void set_mask(GLCanvas *canvas, SpiceQMask *mask, int x, int y)
{
pixman_image_t *image;
- if (!(image = canvas_get_mask(&canvas->base, mask, NULL))) {
+ if (!mask->bitmap ||
+ !(image = canvas_get_mask(&canvas->base, mask, NULL))) {
glc_clear_mask(canvas->glc, GLC_MASK_A);
return;
}