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core/gpu: Ignore top bit when reading colors from the palette

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According to CowBite, the top bit is supposed to be ignored.

fixes #99


Former-commit-id: 28a43311726f9ce5ef26c77687fedecc33b286e0
Former-commit-id: df0b025ed6d51e36bcffd4c91250858167b42f40
This commit is contained in:
Michel Heily 2020-05-23 01:55:40 +03:00
parent f84e425d24
commit 91515b6b10
1 changed files with 6 additions and 6 deletions
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12
rustboyadvance-core/src/gpu/mod.rs
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@ -340,14 +340,14 @@ impl Gpu {
}
#[inline(always)]
pub fn get_palette_color(&self, index: u32, palette_index: u32, offset: u32) -> Rgb15 {
if index == 0 || (palette_index != 0 && index % 16 == 0) {
pub fn get_palette_color(&self, index: u32, palette_bank: u32, offset: u32) -> Rgb15 {
if index == 0 || (palette_bank != 0 && index % 16 == 0) {
return Rgb15::TRANSPARENT;
}
Rgb15(
self.palette_ram
.read_16(offset + 2 * index + 0x20 * palette_index),
)
let value = self.palette_ram.read_16(offset + 2 * index + 0x20 * palette_bank);
// top bit is ignored
Rgb15(value & 0x7FFF)
}
#[inline]