MaxCoderz

Code: Select all

:--------------------------------------------
;Rotate tile by James Montelongo
;input:
;DE = 8x8 tile
;HL = 32 byte buffer(page aligned)
;BC = $1F1E equals Clockwise
;     $1716 equals Counter Clockwise
;
;Output:
;If rotated clockwise data at H*256+$16
;If rotated  counter-clockwise data at H*256+$0E
;
;Size: 15 Bytes

Rotate:
    ld (R_inloop+1),bc
rotateloop:
    ld a,(de)
    inc de
    ld l,c
R_inloop:
    rl (hl)
    rla
    dec l
    jr nz,R_inloop
    djnz rotateloop
    ret

Code: Select all

;Rotate tile
;
;Input:
;HL -> 8x8 tile 
;If you want to rotate the tile clockwise
;DE -> tile, rotated clockwise
;If you want to rotate the tile counterclockwise
;DE -> tile, rotated counterclockwise
;
;Output: 
;rotated tile at DE
; 
;Size: 1 byte

Rotate: ret