1 files changed, 42 insertions, 0 deletions
diff --git a/old/dhwt-codec/src/view.rs b/old/dhwt-codec/src/view.rs
new file mode 100644
index 0000000..0f2ecf7
--- /dev/null
+++ b/old/dhwt-codec/src/view.rs
@@ -0,0 +1,42 @@
+use std::ops::{Index, IndexMut};
+
+use crate::io::{VideoBuf, Value};
+
+#[derive(Copy, Clone, Debug)]
+pub enum IndexMode {
+    XY(usize, usize),
+    XZ(usize, usize),
+    YZ(usize, usize),
+}
+
+pub struct BufferView<'a> {
+    mode: IndexMode,
+    buf: &'a mut VideoBuf,
+}
+
+impl<'a> BufferView<'a> {
+    pub fn new(buf: &'a mut VideoBuf, mode: IndexMode) -> Self {
+        BufferView { mode, buf }
+    }
+}
+
+impl Index<usize> for BufferView<'_> {
+    type Output = Value;
+
+    fn index(&self, a: usize) -> &Self::Output {
+        match self.mode {
+            IndexMode::XY(x, y) => &self.buf[x][y][a],
+            IndexMode::XZ(x, z) => &self.buf[x][a][z],
+            IndexMode::YZ(y, z) => &self.buf[a][y][z],
+        }
+    }
+}
+impl IndexMut<usize> for BufferView<'_> {
+    fn index_mut(&mut self, a: usize) -> &mut Self::Output {
+        match self.mode {
+            IndexMode::XY(x, y) => &mut self.buf[x][y][a],
+            IndexMode::XZ(x, z) => &mut self.buf[x][a][z],
+            IndexMode::YZ(y, z) => &mut self.buf[a][y][z],
+        }
+    }
+}