mirror of https://github.com/nmlgc/ReC98.git
101 lines
1.7 KiB
NASM
101 lines
1.7 KiB
NASM
public CDG_PUT_DISSOLVE_E_8
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cdg_put_dissolve_e_8 proc near
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@@h = word ptr -6
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@@w = word ptr -4
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@@p_offset = word ptr -2
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@@strength = word ptr 4
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@@slot = word ptr 6
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@@center_y = word ptr 8
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@@center_x = word ptr 0Ah
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enter 6, 0
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push si
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push di
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mov bx, [bp+@@slot]
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shl bx, 4
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mov ax, _cdg_slots.pixel_w[bx]
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mov [bp+@@w], ax
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mov bx, [bp+@@slot]
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shl bx, 4
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mov ax, _cdg_slots.pixel_h[bx]
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mov [bp+@@h], ax
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mov ax, [bp+@@w]
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cwd
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sub ax, dx
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sar ax, 1
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sub [bp+@@center_x], ax
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mov ax, [bp+@@h]
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cwd
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sub ax, dx
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sar ax, 1
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sub [bp+@@center_y], ax
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cmp byte_10BC7, 0
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jz short @@put_noalpha
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cmp byte_10BB5, 0
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jnz short @@put_alpha
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@@put_noalpha:
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call cdg_put_noalpha_8 pascal, [bp+@@center_x], [bp+@@center_y], [bp+@@slot]
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jmp short @@dissolve_prepare
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@@put_alpha:
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call cdg_put_8 pascal, [bp+@@center_x], [bp+@@center_y], [bp+@@slot]
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@@dissolve_prepare:
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and [bp+@@strength], 7
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cmp [bp+@@strength], 0
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jz short @@ret
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mov bx, 16
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mov ax, [bp+@@w]
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cwd
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idiv bx
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mov [bp+@@w], ax
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mov ax, [bp+@@center_y]
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add [bp+@@h], ax
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mov ax, [bp+@@center_x]
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sar ax, 3
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mov dx, [bp+@@center_y]
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shl dx, 6
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add ax, dx
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mov dx, [bp+@@center_y]
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shl dx, 4
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add ax, dx
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mov [bp+@@p_offset], ax
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mov ax, 0E000h
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mov es, ax
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assume es:nothing
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mov bx, [bp+@@strength]
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shl bx, 3
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add bx, offset CDG_DISSOLVE_PATTERN
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mov dx, [bp+@@center_y]
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@@dissolve_next_row:
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mov si, dx
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; Hack (and si, 3)
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db 081h
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db 0e6h
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db 003h
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db 000h
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shl si, 1
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mov ax, [bx+si]
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not ax
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mov di, [bp+@@p_offset]
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mov cx, [bp+@@w]
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@@dissolve_apply:
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and es:[di], ax
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add di, 2
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loop @@dissolve_apply
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add [bp+@@p_offset], (640 / 8)
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inc dx
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cmp dx, [bp+@@h]
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jb short @@dissolve_next_row
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@@ret:
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pop di
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pop si
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leave
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retn 8
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cdg_put_dissolve_e_8 endp
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