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mode 0 hfip / vflip, 100% done with tonc brin_demo

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Matthew Berry 2020-11-12 00:09:48 -08:00
parent 7086673a78
commit e7849616ab
1 changed files with 2 additions and 3 deletions
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5
src/crab/ppu.cr
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@ -123,7 +123,6 @@ class PPU
row = @vcount
effective_row = (row + @bg0vofs.value) % (th << 3)
ty = effective_row >> 3
y = effective_row & 7
240.times do |col|
effective_col = (col + @bg0hofs.value) % (tw << 3)
tx = effective_col >> 3
@ -134,8 +133,8 @@ class PPU
tile_id = bits(screen_entry, 0..9)
palette_bank = bits(screen_entry, 12..15)
hflip = bit?(screen_entry, 11)
vflip = bit?(screen_entry, 10)
y = (effective_row & 7) ^ (7 * (screen_entry >> 11 & 1))
x = (effective_col & 7) ^ (7 * (screen_entry >> 10 & 1))
if @bg0cnt.color_mode # 8bpp
abort "todo 8bpp"