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use super::*;

/// "Background 2 Affine Parameter Matrix" (Affine/Bitmap mode only).
///
/// Given as `[pa, pb, pc, pd]`.
///
/// Each value is a signed fixed-point value:
/// * 8 fraction bits
/// * 7 integer bits
/// * sign bit
#[cfg(feature = "unsafe_addresses")]
pub const BG2_AFFINE_MATRIX: WriteOnlyVolAddr<[i16; 4]> =
  unsafe { WriteOnlyVolAddr::new(0x0400_0020) };

/// "Background 2 Reference Point" (Affine/Bitmap mode only).
///
/// Given in `[x, y]`.
///
/// Each coordinate is a signed fixed-point value:
/// * 8 fraction bits
/// * 19 integer bits
/// * sign bit
///
/// This adds up to less than 32 bits used, but you can just write a normal
/// `i32` value and it'll ignore the high bits and "wrap" into the correct
/// range.
#[cfg(feature = "unsafe_addresses")]
pub const BG2_REF_POINT: WriteOnlyVolAddr<[i32; 2]> =
  unsafe { WriteOnlyVolAddr::new(0x0400_0028) };

/// "Background 3 Affine Parameter Matrix" (Affine mode only).
///
/// Given as `[pa, pb, pc, pd]`.
///
/// Each value is a signed fixed-point value:
/// * 8 fraction bits
/// * 7 integer bits
/// * sign bit
#[cfg(feature = "unsafe_addresses")]
pub const BG3_AFFINE_MATRIX: WriteOnlyVolAddr<[i16; 4]> =
  unsafe { WriteOnlyVolAddr::new(0x0400_0030) };

/// "Background 3 Reference Point" (Affine mode only).
///
/// Given in `[x, y]`.
///
/// Each coordinate is a signed fixed-point value:
/// * 8 fraction bits
/// * 19 integer bits
/// * sign bit
///
/// You can just write a normal `i32` value and it'll simply end up ignoring the
/// high bits and "wrapping" properly into range.
#[cfg(feature = "unsafe_addresses")]
pub const BG3_REF_POINT: WriteOnlyVolAddr<[i32; 2]> =
  unsafe { WriteOnlyVolAddr::new(0x0400_0038) };