mirror of https://github.com/pret/pokecrystal.git
104 lines
1.3 KiB
NASM
104 lines
1.3 KiB
NASM
RotateUnownFrontpic:
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; something to do with Unown printer
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push de
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xor a ; BANK(sScratch)
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call OpenSRAM
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ld hl, sScratch
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ld bc, 0
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.loop
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push bc
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push hl
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push bc
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ld de, wPrintedUnownTileSource
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call .Copy
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call .Rotate
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ld hl, UnownPrinter_GBPrinterRectangle
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pop bc
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add hl, bc
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add hl, bc
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ld a, [hli]
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ld e, a
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ld d, [hl]
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ld hl, wPrintedUnownTileDest
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call .Copy
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pop hl
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ld bc, LEN_2BPP_TILE
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add hl, bc
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pop bc
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inc c
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ld a, c
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cp 7 * 7
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jr c, .loop
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ld hl, wGameboyPrinter2bppSource
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ld de, sScratch
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ld bc, 7 * 7 tiles
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call CopyBytes
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pop hl
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ld de, sScratch
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ld c, 7 * 7
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ldh a, [hROMBank]
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ld b, a
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call Get2bpp
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call CloseSRAM
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ret
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.Copy:
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ld c, LEN_2BPP_TILE
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.loop_copy
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ld a, [hli]
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ld [de], a
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inc de
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dec c
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jr nz, .loop_copy
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ret
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.Rotate:
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ld hl, wPrintedUnownTileDest
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ld e, %10000000
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ld d, 8
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.loop_decompress
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push hl
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ld hl, wPrintedUnownTileSource
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call .CountSetBit
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pop hl
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ld a, b
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ld [hli], a
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push hl
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ld hl, wPrintedUnownTileSource + 1
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call .CountSetBit
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pop hl
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ld a, b
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ld [hli], a
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srl e
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dec d
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jr nz, .loop_decompress
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ret
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.CountSetBit:
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ld b, 0
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ld c, 8
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.loop_count
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ld a, [hli]
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and e
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jr z, .clear
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scf
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jr .apply
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.clear
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and a
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.apply
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rr b
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inc hl
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dec c
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jr nz, .loop_count
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ret
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UnownPrinter_GBPrinterRectangle:
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for y, 7
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for x, 7 - 1, -1, -1
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dw wGameboyPrinter2bppSource tile (x * 7 + y)
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endr
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endr
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