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-rw-r--r--image/gif.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/image/gif.c b/image/gif.c
index 697ef408f..8fabf5033 100644
--- a/image/gif.c
+++ b/image/gif.c
@@ -220,7 +220,12 @@ void nsgif_animate(void *p)
data.redraw.full_redraw =
c->data.gif.gif->frames[c->data.gif.current_frame - 1].redraw_required;
} else {
- data.redraw.full_redraw = true;
+ /* do advanced check */
+ data.redraw.full_redraw = !((c->data.gif.current_frame == 0) &&
+ (bitmap_get_opaque(c->data.gif.gif->frame_image)) &&
+ (data.redraw.x == 0) && (data.redraw.y == 0) &&
+ (data.redraw.width = c->data.gif.gif->width) &&
+ (data.redraw.height = c->data.gif.gif->height));
}
/* other data */