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repr packed

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This commit is contained in:
Gwilym Kuiper 2022-09-22 21:33:59 +01:00
parent 4eaf8af72f
commit 496b4a4953
2 changed files with 12 additions and 9 deletions
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2
agb/src/display/object.rs
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@ -1198,7 +1198,7 @@ enum ColourMode {
/// This can be obtained from X/Y scale and rotation angle with /// This can be obtained from X/Y scale and rotation angle with
/// [`agb::syscall::affine_matrix`]. /// [`agb::syscall::affine_matrix`].
#[derive(Copy, Clone, Default, Debug, PartialEq, Eq)] #[derive(Copy, Clone, Default, Debug, PartialEq, Eq)]
#[repr(C)] #[repr(C, packed)]
pub struct AffineMatrixAttributes { pub struct AffineMatrixAttributes {
/// Adjustment made to *X* coordinate when drawing *horizontal* lines. /// Adjustment made to *X* coordinate when drawing *horizontal* lines.
/// Also known as "dx". /// Also known as "dx".

19
agb/src/syscall.rs
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@ -139,7 +139,7 @@ pub fn arc_tan2(x: i16, y: i32) -> i16 {
result result
} }
#[repr(C)] #[repr(C, packed)]
pub struct BgAffineSetData { pub struct BgAffineSetData {
pub matrix: AffineMatrixAttributes, pub matrix: AffineMatrixAttributes,
pub position: Vector2D<Num<i32, 8>>, pub position: Vector2D<Num<i32, 8>>,
@ -180,11 +180,12 @@ pub fn bg_affine_matrix(
unsafe { unsafe {
asm!( asm!(
"swi {SWI}", "swi {SWI}",
SWI = const { swi_map(0x0E) }, SWI = const { swi_map(0x0E) },
in("r0") &input as *const Input, in("r0") &input as *const Input,
in("r1") output.as_mut_ptr(), in("r1") output.as_mut_ptr(),
in("r2") 1, in("r2") 1,
lateout("r3") _,
); );
} }
@ -235,7 +236,9 @@ mod tests {
let one: Num<i16, 8> = 1.into(); let one: Num<i16, 8> = 1.into();
let aff = obj_affine_matrix((one, one).into(), Num::default()); let aff = obj_affine_matrix((one, one).into(), Num::default());
assert_eq!(aff.p_a, one); let (p_a, p_d) = (aff.p_a, aff.p_d);
assert_eq!(aff.p_d, one);
assert_eq!(p_a, one);
assert_eq!(p_d, one);
} }
} }