fn new() -> Self { Self{} }
}
+#[allow(clippy::comparison_chain)]
+fn scale_line<T:Copy>(src: &[T], dst: &mut [T], src_w: usize, dst_w: usize) {
+ if src_w == dst_w {
+ (&mut dst[..dst_w]).copy_from_slice(&src[..dst_w]);
+ } else if src_w < dst_w {
+ if dst_w % src_w == 0 {
+ let step = dst_w / src_w;
+ for (out, srcv) in dst.chunks_exact_mut(step).take(src_w).zip(src.iter()) {
+ for el in out.iter_mut() {
+ *el = *srcv;
+ }
+ }
+ } else {
+ let mut pos = 0;
+ for out in dst.iter_mut().take(dst_w) {
+ *out = src[pos / dst_w];
+ pos += src_w;
+ }
+ }
+ } else {
+ if dst_w % src_w == 0 {
+ let step = src_w / dst_w;
+ for (out, srcv) in dst.iter_mut().take(dst_w).zip(src.iter().step_by(step)) {
+ *out = *srcv;
+ }
+ } else {
+ let mut pos = 0;
+ for out in dst.iter_mut().take(dst_w) {
+ *out = src[pos / dst_w];
+ pos += src_w;
+ }
+ }
+ }
+}
+
+fn fill_plane<T: Copy>(dst: &mut [T], w: usize, h: usize, stride: usize, val: T) {
+ for row in dst.chunks_mut(stride).take(h) {
+ for el in row.iter_mut().take(w) {
+ *el = val;
+ }
+ }
+}
+
macro_rules! scale_loop {
($sbuf:expr, $dbuf:expr) => {
let fmt = $sbuf.get_info().get_format();
for y in 0..dh {
let sy = y * sh / dh;
let soff = ioff + sy * istride;
- for x in 0..dw {
- let sx = x * sw / dw;
- dst[doff + x] = src[soff + sx];
- }
+ scale_line(&src[soff..], &mut dst[doff..], sw, dw);
doff += dstride;
}
}
+ let dfmt = $dbuf.get_info().get_format();
+ let ndcomp = dfmt.get_num_comp();
+ if ndcomp > ncomp {
+ if !fmt.alpha && dfmt.alpha {
+ let acomp = ndcomp - 1;
+ let dstride = $dbuf.get_stride(acomp);
+ let (dw, dh) = $dbuf.get_dimensions(acomp);
+ let doff = $dbuf.get_offset(acomp);
+ let dst = $dbuf.get_data_mut().unwrap();
+ fill_plane(&mut dst[doff..], dw, dh, dstride, 0);
+ }
+ if fmt.model.is_yuv() && ((!fmt.alpha && ncomp == 1) || (fmt.alpha && ncomp == 2)) && ndcomp >= 3 {
+ let uval = 1 << (dfmt.comp_info[1].unwrap().depth - 1);
+ let vval = 1 << (dfmt.comp_info[2].unwrap().depth - 1);
+
+ let ustride = $dbuf.get_stride(1);
+ let vstride = $dbuf.get_stride(2);
+ let (uw, uh) = $dbuf.get_dimensions(1);
+ let (vw, vh) = $dbuf.get_dimensions(2);
+ let uoff = $dbuf.get_offset(1);
+ let voff = $dbuf.get_offset(2);
+ let dst = $dbuf.get_data_mut().unwrap();
+ fill_plane(&mut dst[uoff..], uw, uh, ustride, uval);
+ fill_plane(&mut dst[voff..], vw, vh, vstride, vval);
+ }
+ }
};
}
}
}
-pub fn create_scale() -> Box<Kernel> {
+pub fn create_scale() -> Box<dyn Kernel> {
Box::new(NNResampler::new())
}