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-rw-r--r--source/fitz/draw-device.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/source/fitz/draw-device.c b/source/fitz/draw-device.c
index dc00561b..9146b3e2 100644
--- a/source/fitz/draw-device.c
+++ b/source/fitz/draw-device.c
@@ -160,7 +160,7 @@ fz_knockout_begin(fz_draw_device *dev)
fz_clear_pixmap(ctx, dest);
}
- if (state->blendmode == 0 && isolated)
+ if ((state->blendmode & FZ_BLEND_MODEMASK) == 0 && isolated)
{
/* We can render direct to any existing shape plane. If there
* isn't one, we don't need to make one. */