Implement as_{source,target} for image types

Author: 197g

texel/src/buf.rs

@@ -2134,4 +2134,30 @@ mod tests {
             );
         }
     }
+
+    #[test]
+    fn atomic_memory_move() {
+        const COPY_LEN: usize = 3 * core::mem::size_of::<MaxAtomic>();
+        const TOTAL_LEN: usize = 4 * core::mem::size_of::<MaxAtomic>();
+
+        for offset in 0..4 {
+            let data = [const { MaxAtomic::zero() }; 4];
+            let lhs = atomic_buf::new(&data[..]);
+
+            let data = [const { MaxAtomic::zero() }; 4];
+            let rhs = atomic_buf::new(&data[..]);
+
+            U8.store_atomic_slice(lhs.as_texels(U8).index(0..4), b"helo");
+
+            U8.atomic_memory_move(
+                lhs.as_texels(U8).index(offset..offset + COPY_LEN),
+                rhs.as_texels(U8).index(0..COPY_LEN),
+            );
+
+            let mut buffer = [0x42; TOTAL_LEN];
+            U8.load_atomic_slice(rhs.as_texels(U8), &mut buffer);
+
+            assert_eq!(buffer[..4], b"helo\0\0\0\0"[offset..][..4]);
+        }
+    }
 }

texel/src/image/atomic.rs

@@ -25,7 +25,7 @@ use crate::{BufferReuseError, Texel, TexelBuffer};
 /// manner.
 #[derive(Clone)]
 pub struct AtomicImage<Layout = Bytes> {
-    inner: RawImage<AtomicBuffer, Layout>,
+    pub(super) inner: RawImage<AtomicBuffer, Layout>,
 }
 
 /// A partial view of an atomic image.
@@ -35,7 +35,7 @@ pub struct AtomicImage<Layout = Bytes> {
 /// by calling [`AtomicImage::as_ref`] or [`AtomicImage::checked_to_ref`].
 #[derive(Clone, PartialEq, Eq)]
 pub struct AtomicImageRef<'buf, Layout = &'buf Bytes> {
-    inner: RawImage<&'buf atomic_buf, Layout>,
+    pub(super) inner: RawImage<&'buf atomic_buf, Layout>,
 }
 
 /// Image methods for all layouts.

texel/src/image/cell.rs

@@ -15,7 +15,7 @@ use core::cell::Cell;
 /// between threads. In particular the same buffer may be owned and viewed with different layouts.
 #[derive(Clone, PartialEq, Eq)]
 pub struct CellImage<Layout = Bytes> {
-    inner: RawImage<CellBuffer, Layout>,
+    pub(super) inner: RawImage<CellBuffer, Layout>,
 }
 
 /// A partial view of an atomic image.
@@ -25,7 +25,7 @@ pub struct CellImage<Layout = Bytes> {
 /// by calling [`CellImage::as_ref`] or [`CellImage::checked_to_ref`].
 #[derive(Clone, PartialEq, Eq)]
 pub struct CellImageRef<'buf, Layout = &'buf Bytes> {
-    inner: RawImage<&'buf cell_buf, Layout>,
+    pub(super) inner: RawImage<&'buf cell_buf, Layout>,
 }
 
 /// Image methods for all layouts.