mirror of
https://github.com/italicsjenga/agb.git
synced 2024-12-25 01:01:34 +11:00
Extract VRamManager to the tiled
module
This commit is contained in:
parent
05e8acd93c
commit
ed2af0d57e
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@ -1,11 +1,10 @@
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use core::cell::RefCell;
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use core::cell::RefCell;
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use core::hash::BuildHasherDefault;
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use core::ops::{Deref, DerefMut};
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use core::ops::{Deref, DerefMut};
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use alloc::vec::Vec;
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use alloc::boxed::Box;
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use alloc::{boxed::Box, vec};
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use hashbrown::HashMap;
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pub use super::tiled::VRamManager;
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use rustc_hash::FxHasher;
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use super::tiled::{TileIndex, TileSetReference};
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use crate::bitarray::Bitarray;
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use crate::bitarray::Bitarray;
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use crate::{
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use crate::{
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@ -15,279 +14,21 @@ use crate::{
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};
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};
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use super::{
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use super::{
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palette16, set_graphics_mode, set_graphics_settings, DisplayMode, GraphicsSettings, Priority,
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set_graphics_mode, set_graphics_settings, DisplayMode, GraphicsSettings, Priority,
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DISPLAY_CONTROL,
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DISPLAY_CONTROL,
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};
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};
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const PALETTE_BACKGROUND: MemoryMapped1DArray<u16, 256> =
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unsafe { MemoryMapped1DArray::new(0x0500_0000) };
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#[cfg(debug_assertions)]
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const unsafe fn debug_unreachable_unchecked() -> ! {
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unreachable!();
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}
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#[cfg(not(debug_assertions))]
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const unsafe fn debug_unreachable_unchecked() -> ! {
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use core::hint::unreachable_unchecked;
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unreachable_unchecked();
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}
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#[derive(Clone, Copy, Debug)]
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pub enum TileFormat {
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FourBpp,
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}
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impl TileFormat {
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/// Returns the size of the tile in bytes
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fn tile_size(self) -> usize {
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match self {
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TileFormat::FourBpp => 8 * 8 / 2,
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}
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}
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}
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pub struct TileSet<'a> {
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tiles: &'a [u32],
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format: TileFormat,
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}
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impl<'a> TileSet<'a> {
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pub fn new(tiles: &'a [u32], format: TileFormat) -> Self {
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Self { tiles, format }
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}
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}
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#[derive(Clone, Copy, PartialEq, Eq)]
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pub struct TileSetReference {
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id: u16,
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generation: u16,
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}
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#[derive(Debug)]
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pub struct TileIndex(u16);
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
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struct TileReference(u16, u16);
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enum VRamState {
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ReferenceCounted(u16, TileReference),
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Free(u16),
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}
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impl VRamState {
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fn increase_reference(&mut self) {
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if let VRamState::ReferenceCounted(count, _) = self {
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*count += 1;
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} else {
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unsafe { debug_unreachable_unchecked() };
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}
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}
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fn decrease_reference(&mut self) -> (u16, TileReference) {
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if let VRamState::ReferenceCounted(count, tile_ref) = self {
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*count -= 1;
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(*count, *tile_ref)
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} else {
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unsafe { debug_unreachable_unchecked() };
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}
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}
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}
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enum ArenaStorageItem<T> {
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EndOfFreeList,
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NextFree(usize),
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Data(T, u16),
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}
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pub struct VRamManager<'a> {
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tilesets: Vec<ArenaStorageItem<TileSet<'a>>>,
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generation: u16,
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free_pointer: Option<usize>,
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tile_set_to_vram: HashMap<TileReference, (u16, u16), BuildHasherDefault<FxHasher>>,
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references: Vec<VRamState>,
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vram_free_pointer: Option<usize>,
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}
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const END_OF_FREE_LIST_MARKER: u16 = u16::MAX;
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impl<'a> VRamManager<'a> {
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pub fn new() -> Self {
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Self {
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tilesets: Vec::new(),
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generation: 0,
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free_pointer: None,
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tile_set_to_vram: HashMap::default(),
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references: vec![VRamState::Free(0)],
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vram_free_pointer: None,
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}
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}
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pub fn add_tileset(&mut self, tileset: TileSet<'a>) -> TileSetReference {
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let generation = self.generation;
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self.generation = self.generation.wrapping_add(1);
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let tileset = ArenaStorageItem::Data(tileset, generation);
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let index = if let Some(ptr) = self.free_pointer.take() {
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match self.tilesets[ptr] {
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ArenaStorageItem::EndOfFreeList => {
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self.tilesets[ptr] = tileset;
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ptr
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}
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ArenaStorageItem::NextFree(next_free) => {
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self.free_pointer = Some(next_free);
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self.tilesets[ptr] = tileset;
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ptr
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}
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_ => unsafe { debug_unreachable_unchecked() },
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}
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} else {
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self.tilesets.push(tileset);
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self.tilesets.len() - 1
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};
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TileSetReference::new(index as u16, generation)
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}
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pub fn remove_tileset(&mut self, tile_set_ref: TileSetReference) {
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let tileset = &self.tilesets[tile_set_ref.id as usize];
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match tileset {
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ArenaStorageItem::Data(_, generation) => {
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debug_assert_eq!(
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*generation, tile_set_ref.generation,
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"Tileset generation must be the same when removing"
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);
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self.tilesets[tile_set_ref.id as usize] = if let Some(ptr) = self.free_pointer {
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ArenaStorageItem::NextFree(ptr)
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} else {
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ArenaStorageItem::EndOfFreeList
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};
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self.free_pointer = Some(tile_set_ref.id as usize);
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}
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_ => unsafe { debug_unreachable_unchecked() },
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}
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}
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fn add_tile(&mut self, tile_set_ref: TileSetReference, tile: u16) -> TileIndex {
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let tile_ref = TileReference(tile_set_ref.id, tile);
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if let Some(&reference) = self.tile_set_to_vram.get(&tile_ref) {
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if reference.1 == tile_set_ref.generation {
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self.references[reference.0 as usize].increase_reference();
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return TileIndex(reference.0 as u16);
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}
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}
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let index_to_copy_into = if let Some(ptr) = self.vram_free_pointer.take() {
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match self.references[ptr] {
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VRamState::Free(next_free) => {
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if next_free != END_OF_FREE_LIST_MARKER {
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self.vram_free_pointer = Some(next_free as usize);
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}
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}
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VRamState::ReferenceCounted(_, _) => unsafe { debug_unreachable_unchecked() },
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}
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self.references[ptr] = VRamState::ReferenceCounted(1, tile_ref);
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ptr
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} else {
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self.references
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.push(VRamState::ReferenceCounted(1, tile_ref));
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self.references.len() - 1
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};
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let tile_slice = if let ArenaStorageItem::Data(data, generation) =
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&self.tilesets[tile_set_ref.id as usize]
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{
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debug_assert_eq!(
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*generation, tile_set_ref.generation,
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"Stale tile data requested"
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);
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let tile_offset = (tile as usize) * data.format.tile_size() / 4;
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&data.tiles[tile_offset..(tile_offset + data.format.tile_size() / 4)]
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} else {
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unsafe { debug_unreachable_unchecked() };
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};
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let tile_size_in_half_words = TileFormat::FourBpp.tile_size() / 2;
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const TILE_BACKGROUND_ADDRESS: usize = 0x0600_0000;
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unsafe {
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dma_copy(
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tile_slice.as_ptr() as *const u16,
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(TILE_BACKGROUND_ADDRESS as *mut u16)
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.add(index_to_copy_into * tile_size_in_half_words),
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tile_size_in_half_words,
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);
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}
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self.tile_set_to_vram.insert(
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TileReference(tile_set_ref.id, tile),
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(index_to_copy_into as u16, tile_set_ref.generation),
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);
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TileIndex(index_to_copy_into as u16)
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}
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fn remove_tile(&mut self, tile_index: TileIndex) {
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let index = tile_index.0 as usize;
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let (new_count, tile_ref) = self.references[index].decrease_reference();
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if new_count != 0 {
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return;
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}
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if let Some(ptr) = self.vram_free_pointer {
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self.references[index] = VRamState::Free(ptr as u16);
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} else {
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self.references[index] = VRamState::Free(END_OF_FREE_LIST_MARKER);
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}
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self.tile_set_to_vram.remove(&tile_ref);
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self.vram_free_pointer = Some(index);
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}
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/// Copies raw palettes to the background palette without any checks.
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pub fn set_background_palette_raw(&mut self, palette: &[u16]) {
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for (index, &colour) in palette.iter().enumerate() {
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PALETTE_BACKGROUND.set(index, colour);
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}
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}
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fn set_background_palette(&mut self, pal_index: u8, palette: &palette16::Palette16) {
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for (colour_index, &colour) in palette.colours.iter().enumerate() {
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PALETTE_BACKGROUND.set(pal_index as usize * 16 + colour_index, colour);
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}
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}
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/// Copies palettes to the background palettes without any checks.
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pub fn set_background_palettes(&mut self, palettes: &[palette16::Palette16]) {
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for (palette_index, entry) in palettes.iter().enumerate() {
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self.set_background_palette(palette_index as u8, entry)
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}
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}
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}
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#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
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#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
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#[repr(transparent)]
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#[repr(transparent)]
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struct Tile(u16);
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struct Tile(u16);
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impl Tile {
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impl Tile {
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fn new(idx: TileIndex, setting: TileSetting) -> Self {
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fn new(idx: TileIndex, setting: TileSetting) -> Self {
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Self(idx.0 | setting.setting())
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Self(idx.index() | setting.setting())
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}
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}
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fn tile_index(self) -> TileIndex {
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fn tile_index(self) -> TileIndex {
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TileIndex(self.0 & ((1 << 10) - 1))
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TileIndex::new(self.0 & ((1 << 10) - 1))
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}
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}
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}
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}
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@ -709,12 +450,6 @@ impl Tiled0 {
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}
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}
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}
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}
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impl TileSetReference {
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fn new(id: u16, generation: u16) -> Self {
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Self { id, generation }
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}
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}
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pub struct MapLoan<'a, T> {
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pub struct MapLoan<'a, T> {
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map: T,
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map: T,
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background_id: u8,
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background_id: u8,
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@ -752,28 +487,3 @@ impl<'a, T> Drop for MapLoan<'a, T> {
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.set(self.background_id as usize, false);
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.set(self.background_id as usize, false);
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}
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}
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}
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}
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const fn dma_source_addr(dma: usize) -> usize {
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0x0400_00b0 + 0x0c * dma
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}
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const fn dma_dest_addr(dma: usize) -> usize {
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0x0400_00b4 + 0x0c * dma
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}
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const fn dma_control_addr(dma: usize) -> usize {
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0x0400_00b8 + 0x0c * dma
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}
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const DMA3_SOURCE_ADDR: MemoryMapped<u32> = unsafe { MemoryMapped::new(dma_source_addr(3)) };
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const DMA3_DEST_ADDR: MemoryMapped<u32> = unsafe { MemoryMapped::new(dma_dest_addr(3)) };
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const DMA3_CONTROL: MemoryMapped<u32> = unsafe { MemoryMapped::new(dma_control_addr(3)) };
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unsafe fn dma_copy(src: *const u16, dest: *mut u16, count: usize) {
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assert!(count < u16::MAX as usize);
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DMA3_SOURCE_ADDR.set(src as u32);
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DMA3_DEST_ADDR.set(dest as u32);
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DMA3_CONTROL.set(count as u32 | (1 << 31));
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}
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@ -1,4 +1,7 @@
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use super::background::{RegularMap, TileFormat, TileSet, TileSetting, VRamManager};
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use super::{
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background::{RegularMap, TileSetting},
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tiled::{TileFormat, TileSet, VRamManager},
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};
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crate::include_gfx!("gfx/agb_logo.toml");
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crate::include_gfx!("gfx/agb_logo.toml");
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@ -5,6 +5,8 @@ use video::Video;
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use self::object::ObjectControl;
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use self::object::ObjectControl;
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mod tiled;
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/// Graphics mode 0. Four regular backgrounds.
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/// Graphics mode 0. Four regular backgrounds.
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pub mod background;
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pub mod background;
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/// Graphics mode 3. Bitmap mode that provides a 16-bit colour framebuffer.
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/// Graphics mode 3. Bitmap mode that provides a 16-bit colour framebuffer.
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3
agb/src/display/tiled/mod.rs
Normal file
3
agb/src/display/tiled/mod.rs
Normal file
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@ -0,0 +1,3 @@
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mod vram_manager;
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pub use vram_manager::{TileFormat, TileIndex, TileSet, TileSetReference, VRamManager};
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311
agb/src/display/tiled/vram_manager.rs
Normal file
311
agb/src/display/tiled/vram_manager.rs
Normal file
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@ -0,0 +1,311 @@
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use alloc::vec::Vec;
|
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|
|
||||||
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use core::hash::BuildHasherDefault;
|
||||||
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use hashbrown::HashMap;
|
||||||
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use rustc_hash::FxHasher;
|
||||||
|
|
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use alloc::vec;
|
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|
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use crate::{
|
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|
display::palette16,
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memory_mapped::{MemoryMapped, MemoryMapped1DArray},
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};
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||||||
|
const PALETTE_BACKGROUND: MemoryMapped1DArray<u16, 256> =
|
||||||
|
unsafe { MemoryMapped1DArray::new(0x0500_0000) };
|
||||||
|
|
||||||
|
#[cfg(debug_assertions)]
|
||||||
|
const unsafe fn debug_unreachable_unchecked() -> ! {
|
||||||
|
unreachable!();
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(not(debug_assertions))]
|
||||||
|
const unsafe fn debug_unreachable_unchecked() -> ! {
|
||||||
|
use core::hint::unreachable_unchecked;
|
||||||
|
|
||||||
|
unreachable_unchecked();
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Copy, Debug)]
|
||||||
|
pub enum TileFormat {
|
||||||
|
FourBpp,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TileFormat {
|
||||||
|
/// Returns the size of the tile in bytes
|
||||||
|
fn tile_size(self) -> usize {
|
||||||
|
match self {
|
||||||
|
TileFormat::FourBpp => 8 * 8 / 2,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub struct TileSet<'a> {
|
||||||
|
tiles: &'a [u32],
|
||||||
|
format: TileFormat,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> TileSet<'a> {
|
||||||
|
pub fn new(tiles: &'a [u32], format: TileFormat) -> Self {
|
||||||
|
Self { tiles, format }
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Copy, PartialEq, Eq)]
|
||||||
|
pub struct TileSetReference {
|
||||||
|
id: u16,
|
||||||
|
generation: u16,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TileSetReference {
|
||||||
|
fn new(id: u16, generation: u16) -> Self {
|
||||||
|
Self { id, generation }
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug)]
|
||||||
|
pub struct TileIndex(u16);
|
||||||
|
|
||||||
|
impl TileIndex {
|
||||||
|
pub(crate) const fn new(index: u16) -> Self {
|
||||||
|
Self(index)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub(crate) const fn index(&self) -> u16 {
|
||||||
|
self.0
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
|
||||||
|
struct TileReference(u16, u16);
|
||||||
|
|
||||||
|
enum VRamState {
|
||||||
|
ReferenceCounted(u16, TileReference),
|
||||||
|
Free(u16),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl VRamState {
|
||||||
|
fn increase_reference(&mut self) {
|
||||||
|
if let VRamState::ReferenceCounted(count, _) = self {
|
||||||
|
*count += 1;
|
||||||
|
} else {
|
||||||
|
unsafe { debug_unreachable_unchecked() };
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn decrease_reference(&mut self) -> (u16, TileReference) {
|
||||||
|
if let VRamState::ReferenceCounted(count, tile_ref) = self {
|
||||||
|
*count -= 1;
|
||||||
|
(*count, *tile_ref)
|
||||||
|
} else {
|
||||||
|
unsafe { debug_unreachable_unchecked() };
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
enum ArenaStorageItem<T> {
|
||||||
|
EndOfFreeList,
|
||||||
|
NextFree(usize),
|
||||||
|
Data(T, u16),
|
||||||
|
}
|
||||||
|
|
||||||
|
pub struct VRamManager<'a> {
|
||||||
|
tilesets: Vec<ArenaStorageItem<TileSet<'a>>>,
|
||||||
|
generation: u16,
|
||||||
|
free_pointer: Option<usize>,
|
||||||
|
|
||||||
|
tile_set_to_vram: HashMap<TileReference, (u16, u16), BuildHasherDefault<FxHasher>>,
|
||||||
|
references: Vec<VRamState>,
|
||||||
|
vram_free_pointer: Option<usize>,
|
||||||
|
}
|
||||||
|
|
||||||
|
const END_OF_FREE_LIST_MARKER: u16 = u16::MAX;
|
||||||
|
|
||||||
|
impl<'a> VRamManager<'a> {
|
||||||
|
pub fn new() -> Self {
|
||||||
|
Self {
|
||||||
|
tilesets: Vec::new(),
|
||||||
|
generation: 0,
|
||||||
|
free_pointer: None,
|
||||||
|
|
||||||
|
tile_set_to_vram: HashMap::default(),
|
||||||
|
references: vec![VRamState::Free(0)],
|
||||||
|
vram_free_pointer: None,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn add_tileset(&mut self, tileset: TileSet<'a>) -> TileSetReference {
|
||||||
|
let generation = self.generation;
|
||||||
|
self.generation = self.generation.wrapping_add(1);
|
||||||
|
|
||||||
|
let tileset = ArenaStorageItem::Data(tileset, generation);
|
||||||
|
|
||||||
|
let index = if let Some(ptr) = self.free_pointer.take() {
|
||||||
|
match self.tilesets[ptr] {
|
||||||
|
ArenaStorageItem::EndOfFreeList => {
|
||||||
|
self.tilesets[ptr] = tileset;
|
||||||
|
ptr
|
||||||
|
}
|
||||||
|
ArenaStorageItem::NextFree(next_free) => {
|
||||||
|
self.free_pointer = Some(next_free);
|
||||||
|
self.tilesets[ptr] = tileset;
|
||||||
|
ptr
|
||||||
|
}
|
||||||
|
_ => unsafe { debug_unreachable_unchecked() },
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
self.tilesets.push(tileset);
|
||||||
|
self.tilesets.len() - 1
|
||||||
|
};
|
||||||
|
|
||||||
|
TileSetReference::new(index as u16, generation)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn remove_tileset(&mut self, tile_set_ref: TileSetReference) {
|
||||||
|
let tileset = &self.tilesets[tile_set_ref.id as usize];
|
||||||
|
|
||||||
|
match tileset {
|
||||||
|
ArenaStorageItem::Data(_, generation) => {
|
||||||
|
debug_assert_eq!(
|
||||||
|
*generation, tile_set_ref.generation,
|
||||||
|
"Tileset generation must be the same when removing"
|
||||||
|
);
|
||||||
|
|
||||||
|
self.tilesets[tile_set_ref.id as usize] = if let Some(ptr) = self.free_pointer {
|
||||||
|
ArenaStorageItem::NextFree(ptr)
|
||||||
|
} else {
|
||||||
|
ArenaStorageItem::EndOfFreeList
|
||||||
|
};
|
||||||
|
|
||||||
|
self.free_pointer = Some(tile_set_ref.id as usize);
|
||||||
|
}
|
||||||
|
_ => unsafe { debug_unreachable_unchecked() },
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub(crate) fn add_tile(&mut self, tile_set_ref: TileSetReference, tile: u16) -> TileIndex {
|
||||||
|
let tile_ref = TileReference(tile_set_ref.id, tile);
|
||||||
|
if let Some(&reference) = self.tile_set_to_vram.get(&tile_ref) {
|
||||||
|
if reference.1 == tile_set_ref.generation {
|
||||||
|
self.references[reference.0 as usize].increase_reference();
|
||||||
|
return TileIndex(reference.0 as u16);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
let index_to_copy_into = if let Some(ptr) = self.vram_free_pointer.take() {
|
||||||
|
match self.references[ptr] {
|
||||||
|
VRamState::Free(next_free) => {
|
||||||
|
if next_free != END_OF_FREE_LIST_MARKER {
|
||||||
|
self.vram_free_pointer = Some(next_free as usize);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
VRamState::ReferenceCounted(_, _) => unsafe { debug_unreachable_unchecked() },
|
||||||
|
}
|
||||||
|
|
||||||
|
self.references[ptr] = VRamState::ReferenceCounted(1, tile_ref);
|
||||||
|
ptr
|
||||||
|
} else {
|
||||||
|
self.references
|
||||||
|
.push(VRamState::ReferenceCounted(1, tile_ref));
|
||||||
|
self.references.len() - 1
|
||||||
|
};
|
||||||
|
|
||||||
|
let tile_slice = if let ArenaStorageItem::Data(data, generation) =
|
||||||
|
&self.tilesets[tile_set_ref.id as usize]
|
||||||
|
{
|
||||||
|
debug_assert_eq!(
|
||||||
|
*generation, tile_set_ref.generation,
|
||||||
|
"Stale tile data requested"
|
||||||
|
);
|
||||||
|
|
||||||
|
let tile_offset = (tile as usize) * data.format.tile_size() / 4;
|
||||||
|
&data.tiles[tile_offset..(tile_offset + data.format.tile_size() / 4)]
|
||||||
|
} else {
|
||||||
|
unsafe { debug_unreachable_unchecked() };
|
||||||
|
};
|
||||||
|
|
||||||
|
let tile_size_in_half_words = TileFormat::FourBpp.tile_size() / 2;
|
||||||
|
|
||||||
|
const TILE_BACKGROUND_ADDRESS: usize = 0x0600_0000;
|
||||||
|
unsafe {
|
||||||
|
dma_copy(
|
||||||
|
tile_slice.as_ptr() as *const u16,
|
||||||
|
(TILE_BACKGROUND_ADDRESS as *mut u16)
|
||||||
|
.add(index_to_copy_into * tile_size_in_half_words),
|
||||||
|
tile_size_in_half_words,
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
self.tile_set_to_vram.insert(
|
||||||
|
TileReference(tile_set_ref.id, tile),
|
||||||
|
(index_to_copy_into as u16, tile_set_ref.generation),
|
||||||
|
);
|
||||||
|
|
||||||
|
TileIndex(index_to_copy_into as u16)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub(crate) fn remove_tile(&mut self, tile_index: TileIndex) {
|
||||||
|
let index = tile_index.0 as usize;
|
||||||
|
|
||||||
|
let (new_count, tile_ref) = self.references[index].decrease_reference();
|
||||||
|
|
||||||
|
if new_count != 0 {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if let Some(ptr) = self.vram_free_pointer {
|
||||||
|
self.references[index] = VRamState::Free(ptr as u16);
|
||||||
|
} else {
|
||||||
|
self.references[index] = VRamState::Free(END_OF_FREE_LIST_MARKER);
|
||||||
|
}
|
||||||
|
|
||||||
|
self.tile_set_to_vram.remove(&tile_ref);
|
||||||
|
|
||||||
|
self.vram_free_pointer = Some(index);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copies raw palettes to the background palette without any checks.
|
||||||
|
pub fn set_background_palette_raw(&mut self, palette: &[u16]) {
|
||||||
|
for (index, &colour) in palette.iter().enumerate() {
|
||||||
|
PALETTE_BACKGROUND.set(index, colour);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn set_background_palette(&mut self, pal_index: u8, palette: &palette16::Palette16) {
|
||||||
|
for (colour_index, &colour) in palette.colours.iter().enumerate() {
|
||||||
|
PALETTE_BACKGROUND.set(pal_index as usize * 16 + colour_index, colour);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copies palettes to the background palettes without any checks.
|
||||||
|
pub fn set_background_palettes(&mut self, palettes: &[palette16::Palette16]) {
|
||||||
|
for (palette_index, entry) in palettes.iter().enumerate() {
|
||||||
|
self.set_background_palette(palette_index as u8, entry)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
const fn dma_source_addr(dma: usize) -> usize {
|
||||||
|
0x0400_00b0 + 0x0c * dma
|
||||||
|
}
|
||||||
|
|
||||||
|
const fn dma_dest_addr(dma: usize) -> usize {
|
||||||
|
0x0400_00b4 + 0x0c * dma
|
||||||
|
}
|
||||||
|
|
||||||
|
const fn dma_control_addr(dma: usize) -> usize {
|
||||||
|
0x0400_00b8 + 0x0c * dma
|
||||||
|
}
|
||||||
|
|
||||||
|
const DMA3_SOURCE_ADDR: MemoryMapped<u32> = unsafe { MemoryMapped::new(dma_source_addr(3)) };
|
||||||
|
const DMA3_DEST_ADDR: MemoryMapped<u32> = unsafe { MemoryMapped::new(dma_dest_addr(3)) };
|
||||||
|
const DMA3_CONTROL: MemoryMapped<u32> = unsafe { MemoryMapped::new(dma_control_addr(3)) };
|
||||||
|
|
||||||
|
unsafe fn dma_copy(src: *const u16, dest: *mut u16, count: usize) {
|
||||||
|
assert!(count < u16::MAX as usize);
|
||||||
|
|
||||||
|
DMA3_SOURCE_ADDR.set(src as u32);
|
||||||
|
DMA3_DEST_ADDR.set(dest as u32);
|
||||||
|
|
||||||
|
DMA3_CONTROL.set(count as u32 | (1 << 31));
|
||||||
|
}
|
Loading…
Reference in a new issue