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fix: resolve broken affine bg in mario kart

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-12-18 08:59:19 -04:00
parent 905c4448d0
commit 4326ae7a0a
1 changed files with 6 additions and 3 deletions
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9
src/core/ppu.zig
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@ -521,10 +521,10 @@ pub const Ppu = struct {
aff_x += self.aff_bg[n - 2].pa;
aff_y += self.aff_bg[n - 2].pc;
const x = @bitCast(u32, ix);
const y = @bitCast(u32, iy);
const _x = @truncate(u9, @bitCast(u32, ix));
const _y = @truncate(u8, @bitCast(u32, iy));
const win_bounds = self.windowBounds(@truncate(u9, x), @truncate(u8, y));
const win_bounds = self.windowBounds(_x, _y);
if (!shouldDrawBackground(self, n, win_bounds, i)) continue;
if (self.bg[n].cnt.display_overflow.read()) {
@ -532,6 +532,9 @@ pub const Ppu = struct {
iy = if (iy > px_height) @rem(iy, px_height) else if (iy < 0) px_height + @rem(iy, px_height) else iy;
} else if (ix > px_width or iy > px_height or ix < 0 or iy < 0) continue;
const x = @bitCast(u32, ix);
const y = @bitCast(u32, iy);
const tile_id: u32 = self.vram.read(u8, screen_base + ((y / 8) * @bitCast(u32, tile_width) + (x / 8)));
const row = y & 7;
const col = x & 7;