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/programs/movback/trunk/movback.asm
0,0 → 1,188
include "lang.inc"
include "macros.inc"
 
WND_SIZE_X = 320
WND_SIZE_Y = 200
 
VC_DELTA = 1
HC_DELTA = 2
 
MEOS_APP_START
CODE
fninit
call init_sinus_table
call init_background
call init_palette
mov eax,40
mov ebx,101b
int 0x40
jmp .paint_window
 
.event_loop:
mov eax,23
mov ebx,1
int 0x40
 
test eax,eax
je .draw_screen
dec eax
je .paint_window
 
or eax,-1
int 0x40
 
.draw_screen:
add word [ver_counter],VC_DELTA
add word [hor_counter],HC_DELTA
call handle_animation
mov eax,7
mov ebx,virtual_screen_32
mov ecx,(WND_SIZE_X shl 16)+WND_SIZE_Y
mov edx,(5 shl 16)+23
int 0x40
jmp .event_loop
 
.paint_window:
mov eax,12
mov ebx,1
int 0x40
 
xor eax,eax
mov ebx,(100 shl 16)+(WND_SIZE_X+9)
mov ecx,(100 shl 16)+(WND_SIZE_Y+28)
mov edx,0x03000000
int 0x40
 
mov eax,7
mov ebx,virtual_screen_32
mov ecx,(WND_SIZE_X shl 16)+WND_SIZE_Y
mov edx,(5 shl 16)+23
int 0x40
 
mov eax,4
mov ebx,0x00060006
mov ecx,0x10ffffff
mov edx,window_title
mov esi,window_title_len
int 0x40
 
mov eax,12
mov ebx,2
int 0x40
 
jmp .event_loop
 
init_palette:
mov ecx,256
mov edi,_palette
xor eax,eax
.next_pal:
mov al,ah
shr al,2
stosb
stosb
stosb
inc edi
inc ah
loop .next_pal
ret
 
init_sinus_table:
sub esp,4
mov ecx,256
mov edi,sinetable
.sin_loop:
fld dword [esp]
fld st0
fsin
fmul [scale_sin]
fistp word [edi]
fadd [delta_angle]
fstp dword [esp]
add edi,2
loop .sin_loop
add esp,4
ret
 
init_background:
mov edi,background
xor edx,edx
.ib_vertical:
xor ecx,ecx
.ib_horizontal:
mov eax,ecx
xor eax,edx
stosb
inc ecx
cmp ecx,256
jne .ib_horizontal
inc edx
cmp edx,256
jne .ib_vertical
ret
 
s_OFFX = 0
s_OFFY = 2
 
handle_animation:
sub esp,4
mov ebx,[ver_counter]
and ebx,255
add ebx,ebx
mov ax,[sinetable+ebx]
mov [esp+s_OFFY],ax
mov ebx,[hor_counter]
and ebx,255
add ebx,ebx
mov ax,[sinetable+ebx]
mov [esp+s_OFFX],ax
mov edi,virtual_screen_32
mov edx,WND_SIZE_Y-1
.a_ver:
mov ecx,WND_SIZE_X-1
mov bx,[esp+s_OFFY]
add bx,dx
and ebx,255
shl ebx,8
.a_hor:
mov ax,[esp+s_OFFX]
add ax,cx
and eax,255
lea esi,[background+ebx+eax]
mov al,[esi]
and eax,0xff
mov eax,[_palette+eax*4]
stosw
shr eax,16
stosb
dec ecx
jge .a_hor
dec edx
jge .a_ver
add esp,4
ret
 
DATA
delta_angle dd 0.0245436926066 ; pi/128
scale_sin dd 128.0
 
window_title:
db 'MoveBack'
window_title_len = $ - window_title
 
UDATA
ver_counter dd ?
hor_counter dd ?
 
_palette: rd 256
 
virtual_screen_32:
rb WND_SIZE_X*WND_SIZE_Y*3
 
background:
rb 256*256
 
sinetable:
rw 256
 
MEOS_APP_END
Property changes:
Added: svn:eol-style
+native
\ No newline at end of property