Using tiles larger than 8x8

[piedoom]

Hey there,
I was playing around with using the tiled0 mode with a 16x16 tilesheet defined with the following toml.

version = "1.0"
transparent_colour = "000000"

[image.tetrominos]
filename = "tetrominos.png"
tile_size = "16x16"

I then use it with

let (background, mut vram) = gba.display.video.tiled0();
vram.set_background_palettes(tetrominos::PALETTES);
let tileset = TileSet::new(
    tetrominos::tetrominos.tiles,
    display::tiled::TileFormat::FourBpp,
);
let mut bg = background.background(
    Priority::P0,
    display::tiled::RegularBackgroundSize::Background64x32,
);

However, when I use it for the background, it appears it still is splitting it into 4 8x8 pieces. So, for instance, the first color tile begins at index 4 instead of 1, as 1,2,3,4 are all 8x8 pieces of the first square (which is blank). To draw a full piece, I need to draw 4 separate tiles,

bg.set_tile(
        &mut vram,
        (0u16, 0u16).into(),
        &tileset,
        TileSetting::new(4, false, false, 0),
    );
    bg.set_tile(
        &mut vram,
        (0u16, 1u16).into(),
        &tileset,
        TileSetting::new(6, false, false, 0),
    );
    bg.set_tile(
        &mut vram,
        (1u16, 0u16).into(),
        &tileset,
        TileSetting::new(5, false, false, 0),
    );
    bg.set_tile(
        &mut vram,
        (1u16, 1u16).into(),
        &tileset,
        TileSetting::new(7, false, false, 0),
    );

My question is: is this the intended way to use the library, or should the background tiles respect the size given in the toml file? (Maybe that is only for sprites?)

Thanks!

[gwilymk]

Yeah, this is intended but badly documented. The tile size option was originally intended for sprites (until we got rid of the toml importing of sprites) and now makes the exporting worse but does change the order in which the tiles are exported.

We're hoping to get rid of the include_gfx! macro with the toml definition in the future and replace it with something better, but I'll keep 16x16 tiles in mind because it would be quite nice to have an API for rendering those more easily.