start of tiled data types

src/video/tiled.rs

@@ -0,0 +1,41 @@
+//! Module for tiled mode types and operations.
+
+use super::*;
+
+/// An 8x8 tile with 4bpp
+#[derive(Debug, Clone, Copy, Default)]
+#[repr(transparent)]
+pub struct Tile4bpp {
+  pub data: [u32; 8],
+}
+
+/// An 8x8 tile with 8bpp
+#[derive(Debug, Clone, Copy, Default)]
+#[repr(transparent)]
+pub struct Tile8bpp {
+  pub data: [u32; 16],
+}
+
+/// A charblock of 4bpp tiles
+#[derive(Clone, Copy)]
+#[repr(transparent)]
+pub struct Charblock4bpp {
+  pub data: [Tile4bpp; 512],
+}
+
+/// A charblock of 8bpp tiles
+#[derive(Clone, Copy)]
+#[repr(transparent)]
+pub struct Charblock8bpp {
+  pub data: [Tile8bpp; 256],
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+#[repr(transparent)]
+pub struct TextScreenblockEntry(u16);
+
+#[derive(Clone, Copy)]
+#[repr(transparent)]
+pub struct TextScreenblock {
+  pub data: [TextScreenblockEntry; 32 * 32],
+}