Fix handling of top two pixel rows in be_blur_c

5dd56af2 replaced our implementation of \be with xy-VSFilter's.
This error is not present in the xy-VSFilter code; it was introduced
by accident in a merge that was later squashed as part of 5dd56af2.

Note: the new \be reads in but does not write out
the first and last row and column of pixels.

1 files changed, 4 insertions, 3 deletions

diff --git a/libass/ass_bitmap.c b/libass/ass_bitmap.c
index f214651..33f06c4 100644
--- a/libass/ass_bitmap.c
+++ b/libass/ass_bitmap.c
@@ -436,7 +436,7 @@ void be_blur_c(uint8_t *buf, intptr_t w,
 {
     unsigned short *col_pix_buf = tmp;
     unsigned short *col_sum_buf = tmp + w * sizeof(unsigned short);
-    unsigned x, y, old_pix, old_sum, new_sum, temp1, temp2;
+    unsigned x, y, old_pix, old_sum, temp1, temp2;
     unsigned char *src, *dst;
     memset(col_pix_buf, 0, w * sizeof(unsigned short));
     memset(col_sum_buf, 0, w * sizeof(unsigned short));
@@ -456,9 +456,10 @@ void be_blur_c(uint8_t *buf, intptr_t w,
             col_pix_buf[x] = temp1;
         }
     }
-    new_sum = 2 * buf[y * stride + w - 1];
-    buf[y * stride + w - 1] = (old_sum + new_sum) >> 2;
     {
+        y = 1;
+        src=buf+y*stride;
+
         x = 2;
         old_pix = src[x-1];
         old_sum = old_pix + src[x-2];