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tmp: disable buggy window emulation 

I'd like to merge my affine sprite impl into main, which will require
merging a lot of the rewrites I did in this branch. My plan is to
merge the buggy ppu window impl to main, but keep it disabled.

This is technically a regression but the current impl barely worked
anyways so....
This commit is contained in:
Rekai Nyangadzayi Musuka 2022-12-17 09:53:40 -04:00
parent f98a1700e0
commit 5aac04faf5
1 changed files with 14 additions and 8 deletions
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22
src/core/ppu.zig
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@ -839,16 +839,22 @@ pub const Ppu = struct {
const WindowBounds = enum { win0, win1, out };
fn windowBounds(self: *Self, x: u9, y: u8) ?WindowBounds {
const win0 = self.dispcnt.win_enable.read() & 1 == 1;
const win1 = (self.dispcnt.win_enable.read() >> 1) & 1 == 1;
const winObj = self.dispcnt.obj_win_enable.read();
_ = y;
_ = x;
_ = self;
// FIXME: Remove to enable PPU Window Emulation
return null;
if (!(win0 or win1 or winObj)) return null;
// const win0 = self.dispcnt.win_enable.read() & 1 == 1;
// const win1 = (self.dispcnt.win_enable.read() >> 1) & 1 == 1;
// const winObj = self.dispcnt.obj_win_enable.read();
if (win0 and self.win.inRange(0, x, y)) return .win0;
if (win1 and self.win.inRange(1, x, y)) return .win1;
// if (!(win0 or win1 or winObj)) return null;
return .out;
// if (win0 and self.win.inRange(0, x, y)) return .win0;
// if (win1 and self.win.inRange(1, x, y)) return .win1;
// return .out;
}
fn shouldDrawBackground(self: *Self, comptime layer: u2, bounds: ?WindowBounds, i: usize) bool {
@ -1410,7 +1416,7 @@ fn shouldDrawSprite(bldcnt: io.BldCnt, scanline: *Scanline, x: u9) bool {
0b01 => {
// BLD_ALPHA
// We want to check if we're concerned aout the bottom layer first
// We want to check if we're concerned aout the bottom layer first
// because if so, the top layer already having a pixel is OK
const btm_layers = bldcnt.layer_b.read();
const is_btm_layer = (btm_layers >> 4) & 1 == 1;