mirror of https://github.com/nmlgc/ReC98.git
75 lines
1.3 KiB
NASM
75 lines
1.3 KiB
NASM
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public SHOT_LASER_PUT_RAW
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shot_laser_put_raw proc near
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@@left equ <ax>
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@@top equ <dx>
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@@cel equ <bx>
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@@h equ <si>
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@@rows_after_roll equ <dx>
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@@top_in equ <bx>
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push si
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push di
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mov cx, @@left
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sar @@left, 3
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mov di, @@left
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and cl, 7
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xor ah, ah
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mov al, _SHOT_LASER_DOTS[@@cel]
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ror ax, cl
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mov @@top_in, @@top
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shl @@top, 6
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add di, @@top
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shr @@top, 2
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add di, @@top
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mov dx, GRAM_400
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mov es, dx
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shr @@h, 4
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mov cx, @@h
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add cx, @@top_in
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cmp cx, RES_Y
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ja short @@roll_needed
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mov cx, @@h
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xor @@rows_after_roll, @@rows_after_roll
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jmp short @@blit_loop
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; ---------------------------------------------------------------------------
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@@roll_needed:
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mov cx, RES_Y
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sub cx, @@top_in
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mov @@rows_after_roll, @@h
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sub @@rows_after_roll, cx
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@@blit_loop:
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or ah, ah
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jz short @@byte_loop
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even
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@@word_loop:
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stosw
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add di, (ROW_SIZE - word)
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loop @@word_loop
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jmp short @@roll?
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; ---------------------------------------------------------------------------
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@@byte_loop:
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stosb
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add di, (ROW_SIZE - byte)
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loop @@byte_loop
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@@roll?:
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or @@rows_after_roll, @@rows_after_roll
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jz short @@ret
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sub di, PLANE_SIZE
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xchg cx, @@rows_after_roll
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jmp short @@blit_loop
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; ---------------------------------------------------------------------------
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@@ret:
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pop di
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pop si
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retn
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shot_laser_put_raw endp
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even
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