alex/agb
1
0
Fork 0
mirror of https://github.com/italicsjenga/agb.git synced 2025-01-11 17:41:33 +11:00
Code Issues Packages Projects Releases Wiki Activity

Extract method for copying a tile to location

Browse source
This commit is contained in:
Gwilym Kuiper 2022-03-27 21:37:14 +01:00
parent d2dceeb656
commit 4b8f41140e
1 changed files with 34 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

59
agb/src/display/tiled/vram_manager.rs
View file

@ -177,6 +177,39 @@ impl<'a> VRamManager<'a> {
TileReference(NonNull::new(ptr as *mut _).unwrap())
}
fn copy_tile_to_location(
&self,
tile_set_ref: TileSetReference,
tile_id: u16,
tile_reference: TileReference,
) {
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_id as usize) * data.format.tile_size();
&data.tiles[tile_offset..(tile_offset + data.format.tile_size())]
} else {
panic!("Target tile set ref must point to an existing tile set reference")
};
let tile_size_in_half_words = tile_slice.len() / 2;
let target_location = tile_reference.0.as_ptr() as *mut _;
unsafe {
dma_copy16(
tile_slice.as_ptr() as *const u16,
target_location,
tile_size_in_half_words,
)
};
}
pub fn replace_tile(
&mut self,
source_tile_set_ref: TileSetReference,
@ -188,31 +221,7 @@ impl<'a> VRamManager<'a> {
.tile_set_to_vram
.get(&(source_tile_set_ref.id, source_tile))
{
let tile_slice = if let ArenaStorageItem::Data(data, generation) =
&self.tilesets[target_tile_set_ref.id as usize]
{
debug_assert_eq!(
*generation, target_tile_set_ref.generation,
"Stale tile data requested"
);
let tile_offset = (target_tile as usize) * data.format.tile_size();
&data.tiles[tile_offset..(tile_offset + data.format.tile_size())]
} else {
panic!("Target tile set ref must point to an existing tile set reference")
};
let tile_size_in_half_words = tile_slice.len() / 2;
let target_location = reference.0.as_ptr() as *mut _;
unsafe {
dma_copy16(
tile_slice.as_ptr() as *const u16,
target_location,
tile_size_in_half_words,
)
};
self.copy_tile_to_location(target_tile_set_ref, target_tile, reference);
}
}