+fn avg(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bw: usize, bh: usize) {
+ for (dline, sline) in dst.chunks_mut(dstride).zip(src.chunks(sstride)).take(bh) {
+ for (dst, src) in dline.iter_mut().zip(sline.iter()).take(bw) {
+ *dst = ((u16::from(*dst) + u16::from(*src) + 1) >> 1) as u8;
+ }
+ }
+}
+
+fn avg_2(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bh: usize) {
+ avg(dst, dstride, src, sstride, 2, bh);
+}
+fn avg_4(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bh: usize) {
+ avg(dst, dstride, src, sstride, 4, bh);
+}
+fn avg_8(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bh: usize) {
+ avg(dst, dstride, src, sstride, 8, bh);
+}
+fn avg_16(dst: &mut [u8], dstride: usize, src: &[u8], sstride: usize, bh: usize) {
+ avg(dst, dstride, src, sstride, 16, bh);
+}
+