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kolibrios/programs/media/animage/trunk/graphlib.inc

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*fixed info for 4th function in documentation *added animage and kfar *renamed docpak (to docpack) *chess fixed by Yellow to use 70th function *docpack, tetris, jpegview, trantest, desktop uses system colors, new functions of window drawing now *removed old rd2hd and rd2fd git-svn-id: svn://kolibrios.org@180 a494cfbc-eb01-0410-851d-a64ba20cac60
2006-10-12 01:19:10 +02:00
; mov [pointer_to_screen],eax
; mov [output_array],ebx
; mov [screen_size_x],ecx
;setpixel (pixel_x,pixel_y)
setpixel:
mov ecx,[output_array]
mov eax,[pixel_y]
mov ebx,[screen_size_x]
imul eax,ebx
add eax,[pixel_x]
lea eax,[eax+eax*2]
add eax,[pointer_to_screen]
mov [ecx],eax
add [output_array],4
ret
; procedure <<<<<<PutPixel>>>>>>
; IN
; eax - pointer to picture
; ebx - picture size x
; ecx - color of pixel
; esi - x coordinat of pixel
; edi - y coordinat of pixel
; OUT
; not returned value
PutPixel:
imul ebx,edi
add ebx,esi
lea ebx,[ebx+ebx*2]
add eax,ebx
mov ebx,ecx
shr ebx,16
mov [eax],cx
mov [eax+2],bl
ret
; function <<<<<<GetColorOfPixel>>>>>>
; IN
; eax - pointer to picture
; ebx - picture size x
; esi - x coordinat of pixel
; edi - y coordinat of pixel
; OUT
; eax - color of pixel in coordinats (x,y)
GetColorOfPixel:
imul ebx,edi
add ebx,esi
lea ebx,[ebx+ebx*2]
add eax,ebx
mov ebx,[eax]
and ebx,0xffffff
mov eax,ebx
ret
;procedure <<<<calculate line>>>>
; IN
;eax - pointer to screen
;ebx - output array
;ecx - (screen size x)*bytes per pixel
;edx - x1*65536+y1
;esi x2
;edi - y2
; OUT
;eax - number of pixels
calculate_line:
mov [pointer_to_screen],eax
mov [output_array],ebx
mov [screen_size_x],ecx
mov eax,edx
and eax,0xffff
shr edx,16
mov [x_l],edx ;x=x1
mov [y_l],eax ;y=y1
mov [sx],1
mov [sy],1
mov edx,[output_array]
sub esi,[x_l] ;esi=x2-x1
jnz no_0_x
and esi,0
jmp x_no_minus
no_0_x:
jns x_no_minus
neg esi
mov [sx],-1 ;sx=-sx
x_no_minus:
sub edi,[y_l] ;edi=y2-y1
jnz no_0_y
and edi,0
jmp y_no_minus
no_0_y:
jns y_no_minus
neg edi
mov [sy],-1 ;sy=-sy
y_no_minus:
mov [_dx],esi
mov [_dy],edi
cmp [_dx],0 ;if (dx=0 & dy=0) { }
jnz no_null_d
cmp [_dy],0
jnz no_null_d
mov eax,[x_l]
mov ebx,[y_l]
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel ;setpixel(x1,y1)
mov eax,1
ret
no_null_d:
cmp edi,esi ;if (dy>dx) { }
jle no_bigger
mov eax,[_dx]
mov [z],eax ;z=dx
mov eax,[_dy]
mov [_dx],eax ;dx=dy
mov eax,[z]
mov [_dy],eax ;dy=z
mov [_ch],dword 1 ;ch=true
jmp exit_if2
no_bigger: ;else {}
and [_ch],0
exit_if2:
mov eax,[_dy]
shl eax,1
sub eax,[_dx]
mov [e],eax ;e=2*dy-dx
mov esi,1 ;counter
mov edi,[sx]
mov ebp,[sy]
do:
mov eax,[x_l]
mov ebx,[y_l]
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
cmp [e],0
js while_e
mov eax,[_ch]
test eax,eax
jz ch_else
add [x_l],edi
jmp exit_if3
ch_else:
add [y_l],ebp
exit_if3:
mov eax,[_dx]
shl eax,1
sub [e],eax ;e=e-2*dx
while_e:
mov eax,[_ch]
test eax,eax
jz ch_else2
add [y_l],ebp
jmp exit_if4
ch_else2:
add [x_l],edi
exit_if4:
mov eax,[_dy]
shl eax,1
add [e],eax ;e=e+2*dy
inc esi
mov ecx,[_dx]
cmp esi,ecx
jle do ;while (i<=dx)
mov eax,[x_l]
mov ebx,[y_l]
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[output_array]
sub eax,edx
shr eax,2
ret
;---------------------------
;procedure calculate <<<<<rectangle>>>>>>>
; IN
;eax - pointer to screen
;ebx - output array
;ecx - (screen size x)
;edx - x1*65536+y1
;esi x2
;edi - y2
; OUT
;eax - number of pixels
calculate_rectangle:
mov [pointer_to_screen],eax
mov [output_array],ebx
mov [screen_size_x],ecx
mov eax,edx
and eax,0xffff
shr edx,16
mov [x_l],edx ;x=x1
mov [y_l],eax ;y=y1
mov [x2],esi ;x2
mov [y2],edi ;y2
mov [sx],1
mov [sy],1
mov edx,[output_array]
sub esi,[x_l] ;esi=x2-x1
jnz no_0_x_r
and esi,0
jmp x_no_minus_r
no_0_x_r:
jns x_no_minus_r
neg esi
mov [sx],-1 ;sx=-sx
x_no_minus_r:
sub edi,[y_l] ;edi=y2-y1
jnz no_0_y_r
and edi,0
jmp y_no_minus_r
no_0_y_r:
jns y_no_minus_r
neg edi
mov [sy],-1 ;sy=-sy
y_no_minus_r:
mov [_dx],esi
mov [_dy],edi
cmp [_dx],0 ;if (dx=0 & dy=0) { }
jnz no_null_r
cmp [_dy],0
jnz no_null_r
mov eax,[x_l]
mov ebx,[y_l]
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel ;setpixel(x1,y1)
mov eax,1
ret
no_null_r:
mov edi,[_dx]
mov esi,[x_l] ;x1
horizontal_lines:
mov eax,esi ;x
mov ebx,[y_l] ;y1
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,esi ;x
mov ebx,[y2] ;y2
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
add esi,[sx]
dec edi
jns horizontal_lines
mov edi,[_dy]
mov esi,[y_l] ;y1
vertical_lines:
mov eax,[x_l] ;x1
mov ebx,esi ;y
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;x2
mov ebx,esi ;y
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
add esi,[sy]
dec edi
jns vertical_lines
mov eax,[output_array]
sub eax,edx
shr eax,2
ret
;procedure <<<<<<calculate_circle>>>>>>
; IN
;eax - pointer to screen
;ebx - output array
;ecx - (screen size x)*bytes per pixel
;edx - x_c*65536+y_c
;esi r
; OUT
;eax - number of pixels
calculate_circle:
mov [pointer_to_screen],eax
mov [output_array],ebx
mov [screen_size_x],ecx
mov eax,edx
and eax,0xffff
shr edx,16
mov [x2],edx ;circle centr x
mov [y2],eax ;circle centr y
mov [r],esi ;radius of cicrle
mov edx,[output_array]
mov [x_l],0 ;x=0
mov [y_l],esi ;y=r
mov [d],3
mov eax,[r]
shl eax,1
sub [d],eax ;d=3-2*r
while_circle:
mov esi,[y_l]
mov edi,[x_l]
sub esi,edi ;while y>=x
js exit_while_circle
mov eax,[x_l] ;x
mov ebx,[y_l] ;y
add eax,[x2] ;x+xc
add ebx,[y2] ;y+yc
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x_l] ;x
mov ebx,[y2] ;yc
add eax,[x2] ;x+xc
sub ebx,[y_l] ;yc-y
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;xc
mov ebx,[y2] ;yc
sub eax,[x_l] ;xc-x
add ebx,[y_l] ;yc+y
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;xc
mov ebx,[y2] ;yc
sub eax,[x_l] ;xc-x
sub ebx,[y_l] ;yc-y
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;xc
mov ebx,[y2] ;yc
add eax,[y_l] ;xc+y
add ebx,[x_l] ;yc+x
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;xc
mov ebx,[y2] ;yc
add eax,[y_l] ;xc+y
sub ebx,[x_l] ;yc-x
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;xc
mov ebx,[y2] ;yc
sub eax,[y_l] ;xc-y
add ebx,[x_l] ;x+yc
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[x2] ;xc
mov ebx,[y2] ;yc
sub eax,[y_l] ;xc-y
sub ebx,[x_l] ;yc-x
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
cmp [d],0
jns if1_d
mov eax,[x_l]
shl eax,2
add eax,6
add [d],eax ;d=d+4*x+6
jmp exit_if1_d
if1_d:
mov eax,[x_l]
sub eax,[y_l]
shl eax,2
add eax,10
add [d],eax ;d=d+4*(x-y)+10
dec [y_l]
exit_if1_d:
inc [x_l]
jmp while_circle
exit_while_circle:
mov eax,[output_array]
sub eax,edx
shr eax,2
ret
;procedure <<<<<<flood fill>>>>>
;IN
;eax - pointer to screen
;ebx - pointer to output array
;ecx - picture size x
;edx - x0*65536+y0
;esi - x_max*65536+y_max
;edi - color of flood fill arrea
flood_fill:
mov [pointer_to_screen],eax
mov [output_array],ebx
mov [screen_size_x],ecx
mov eax,edx
and edx,0xffff
shr eax,16
mov [sx],eax ;x0
mov [sy],edx ;y0
mov eax,esi
and esi,0xffff
shr eax,16
mov [m_x],eax ;maximum x size of picture
mov [m_y],esi ;maximum y size of picture
mov [c_f],edi ;color of feel
mov eax,[output_array] ; stek
mov [eax],dword 1 ; number of pointes in stek
mov esi,[sx]
mov edi,[sy]
mov [eax+4],si ;x0
mov [eax+4+2],di ;y0
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
call GetColorOfPixel
mov [c],eax
cmp eax,[c_f]
jne can_flood_fill
mov eax,[output_array]
mov [eax],dword 0
ret
can_flood_fill:
while_no_null:
;<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>न<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD>⥪<EFBFBD>
mov eax,[output_array]
mov ebx,[eax]
dec ebx
shl ebx,2 ;ebx=ebx*8
add ebx,4 ;ebx=ebx*8+4
xor esi,esi
xor edi,edi
mov si,[eax+ebx] ;x
mov di,[eax+ebx+2] ;y
mov [x2],esi
mov [y2],edi
mov [sy],edi
mov eax,[output_array]
mov ebx,[eax]
dec ebx
mov [eax],ebx ;
; go to right until color=c or until x<MaxXPicture
mov edx,[x2]
go_to_right:
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
mov esi,edx;
mov edi,[sy]
call GetColorOfPixel
cmp eax,[c]
jne not_color_of_feeling_arrea_right
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
mov ecx,[c_f] ;color of filinf flood
mov esi,edx
mov edi,[sy]
call PutPixel
inc edx
mov eax,edx
cmp eax,[m_x]
jle go_to_right
not_color_of_feeling_arrea_right:
mov eax,edx
dec eax ;----------------------------------
mov [x_r],eax ; save right absciss
; go to left until color=c or until x>0
mov esi,[x2]
mov edi,[y2]
dec esi
mov edx,esi
mov [sy],edi
go_to_left:
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
mov esi,edx
mov edi,[sy]
call GetColorOfPixel
cmp eax,[c]
jne not_color_of_feeling_arrea_left
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
mov ecx,[c_f] ;color of filing flood
mov esi,edx
mov edi,[sy]
call PutPixel
dec edx
jns go_to_left
not_color_of_feeling_arrea_left:
mov eax,edx
inc eax ;----------------------------------------
mov [x_l],eax ; save left absciss
mov edi,[y2]
dec edi
jns no_null_1_floodfill
mov edi,1
no_null_1_floodfill:
mov [sy],edi
mov eax,[output_array]
mov ebx,[eax]
mov [l_s],ebx ; save total number of points in stek
mov [l_c],-1 ; last color = -1
mov edx,[x_l]
analizing_from_left_to_right_upper:
;<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㥬 <EFBFBD><EFBFBD><EFBFBD>ᥫ<EFBFBD> <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
mov esi,edx
mov edi,[sy]
call GetColorOfPixel
push eax
cmp eax,[c] ;<EFBFBD>᫨ 梥<EFBFBD> <EFBFBD>஢<EFBFBD><EFBFBD>אַ<EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>ᥫ<EFBFBD> <EFBFBD><EFBFBD> ࠢ<EFBFBD><EFBFBD> <EFBFBD>,<EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᨬ <EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD>⥪
jne no_fill_1
mov ebx,[l_c]
cmp ebx,[c]
jne no_fill_1
mov edi,[sy]
mov eax,[output_array]
mov ebx,[eax]
inc ebx
mov [eax],ebx
dec ebx
shl ebx,2
add ebx,4
mov esi,edx
dec esi
mov [eax+ebx],si
mov [eax+ebx+2],di
no_fill_1:
pop [l_c]
inc edx
cmp edx,[x_r]
jle analizing_from_left_to_right_upper
mov ebx,[l_c]
cmp ebx,[c] ;last color is c(color of filing arrea) ?
jne have_changes_in_stek_1
;save last color in stek
mov edi,[sy]
mov eax,[output_array]
mov ebx,[eax]
inc ebx
mov [eax],ebx
dec ebx
shl ebx,2
add ebx,4
mov esi,edx
dec esi
mov [eax+ebx],si
mov [eax+ebx+2],di
have_changes_in_stek_1:
mov edi,[y2]
inc edi
cmp edi,[m_y]
jle no_max_1_floodfill
mov edi,[m_y]
no_max_1_floodfill:
mov [sy],edi
mov eax,[output_array]
mov ebx,[eax]
mov [l_s],ebx ; save total number of points in stek
mov [l_c],-1 ; last color = -1
mov edx,[x_l]
analizing_from_left_to_right_down:
;<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㥬 <EFBFBD><EFBFBD><EFBFBD>ᥫ<EFBFBD> <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mov eax,[pointer_to_screen]
mov ebx,[screen_size_x]
mov esi,edx
mov edi,[sy]
call GetColorOfPixel
push eax
cmp eax,[c] ;<EFBFBD>᫨ 梥<EFBFBD> <EFBFBD>஢<EFBFBD><EFBFBD>אַ<EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>ᥫ<EFBFBD> <EFBFBD><EFBFBD> ࠢ<EFBFBD><EFBFBD> <EFBFBD>,<EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᨬ <EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD>⥪
je no_fill_3
mov ebx,[l_c]
cmp ebx,[c]
jne no_fill_3
mov edi,[sy]
mov eax,[output_array]
mov ebx,[eax]
inc ebx
mov [eax],ebx
dec ebx
shl ebx,2
add ebx,4
mov esi,edx
dec esi
mov [eax+ebx],si
mov [eax+ebx+2],di
no_fill_3:
pop [l_c]
inc edx
cmp edx,[x_r]
jle analizing_from_left_to_right_down
mov ebx,[l_c]
cmp ebx,[c] ;last color is c(color of filing arrea) ?
jne have_changes_in_stek_2
;save last color in stek
mov edi,[sy]
mov eax,[output_array]
mov ebx,[eax]
inc ebx
mov [eax],ebx
dec ebx
shl ebx,2
add ebx,4
mov esi,edx
dec esi
mov [eax+ebx],si
mov [eax+ebx+2],di
have_changes_in_stek_2:
mov ebx,[output_array] ;while stek have points <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD>⥪<EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>窨(<EFBFBD><EFBFBD><EFBFBD>न<EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
mov ecx,[ebx]
test ecx,ecx
jnz while_no_null
ret
; procedure <<<<<<calculate ellips>>>>>>
; IN
; eax - pointer to picture
; ebx - output array
; ecx - picture size x
; edx - x0*65536+y0
; esi - a*65536+b
; edi - color
; OUT
; procedure not return value
calculate_ellips:
mov [pointer_to_screen],eax
mov [output_array],ebx
mov [screen_size_x],ecx
mov [e],ebx
mov eax,edx
and eax,0xffff
shr edx,16
mov [x2],edx ; centr x
mov [y2],eax ; centr y
mov eax,esi
and eax,0xffff ;eax=b
shr esi,16 ;esi=a
mov [a],esi
mov [b],eax
mov [c],edi ;color
mov [row],eax ;b
imul esi,esi ;a*a
imul eax,eax ;b*b
mov [a_square],esi
mov [b_square],eax
and [col],0
shl esi,1
shl eax,1
mov [two_a_square],esi
mov [two_b_square],eax
shl esi,1
shl eax,1
mov [four_a_square],esi
mov [four_b_square],eax
mov eax,[row] ;eax=row
mov ebx,eax
dec ebx ;ebx=(row-1)
imul ebx,eax ;ebx=(row-1)*row
imul ebx,[two_a_square] ;ebx=two_a_square*((row-1)*row)
mov ecx,[a_square] ;ecx=a_square
mov eax,1
sub eax,ecx ;eax=(1-a_square)
imul eax,[two_b_square] ;eax=two_b_square*(1-a_square)
add ebx,[a_square] ;ebx=two_a_square*((row-1)*row)+a_square
add eax,ebx ;eax=two_a_square*((row-1)*row)+a_square+two_b_square*(1-a_square)
mov [d],eax
mov edx,[x2] ;x
mov ebp,[y2] ;y
while_ellips_1:
mov esi,[a_square]
mov edi,[b_square]
imul esi,[row]
imul edi,[col]
cmp esi,edi
jle no_while_ellips_1
mov eax,edx ;x
mov ebx,ebp ;y
add eax,[col] ;x+col
add ebx,[row] ;y+row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,edx ;x
mov ebx,ebp ;y
add eax,[col] ;x+col
sub ebx,[row] ;y-row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,edx ;x
mov ebx,ebp ;y
sub eax,[col] ;x-col
add ebx,[row] ;y+row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,edx ;x
mov ebx,ebp ;y
sub eax,[col] ;x-col
sub ebx,[row] ;y-row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[d]
cmp eax,0
js lab33 ;>=0
dec [row]
mov ebx,[four_a_square]
mov ecx,[row]
imul ebx,ecx ;ebx=four_a_square*(row)
sub [d],ebx ;d=d-four_a_square*(row)
lab33:
mov eax,[col]
shl eax,1
add eax,3
imul eax,[two_b_square]
add [d],eax ;d=d+two_b_square*(3+(col*2))
inc [col]
jmp while_ellips_1
no_while_ellips_1:
mov eax,[col]
inc eax
imul eax,[col]
imul eax,[two_b_square] ;eax=two_b_square*((col+1)*col)
mov ebx,[row]
sub ebx,2
imul ebx,[row]
inc ebx
imul ebx,[two_a_square] ;ebx=two_a_square*((row-2)*row+1)
mov ecx,1
sub ecx,[two_a_square]
imul ecx,[b_square] ;ecx=(1-two_a_square)*b_square
add eax,ebx
add eax,ecx
mov [d],eax ;two_b_square*(col+1)*col+two_a_square*(row*(row-2)+1)+(1-two_a_square)*b_square
mov edx,[x2] ;x
mov ebp,[y2] ;y
while_ellips_2:
mov esi,[row]
inc esi
test esi,esi
jz no_while_ellips_2
mov eax,edx ;x
mov ebx,ebp ;y
add eax,[col] ;x+col
add ebx,[row] ;y+row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,edx ;x
mov ebx,ebp ;y
add eax,[col] ;x+col
sub ebx,[row] ;y-row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,edx ;x
mov ebx,ebp ;y
sub eax,[col] ;x-col
add ebx,[row] ;y+row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,edx ;x
mov ebx,ebp ;y
sub eax,[col] ;x-col
sub ebx,[row] ;y-row
mov [pixel_x],eax
mov [pixel_y],ebx
call setpixel
mov eax,[d]
cmp eax,0
jns lab34
inc [col]
mov ebx,[col]
imul ebx,[four_b_square]
add [d],ebx ;d=d+four_b_square*col
lab34:
dec [row]
mov ebx,[row]
shl ebx,1
mov eax,3
sub eax,ebx
imul eax,[two_a_square]
add [d],eax ;d=d+two_b_square*(3-(row*2))
jmp while_ellips_2
no_while_ellips_2:
mov eax,[output_array]
sub eax,[e]
shr eax,2
ret
;---------------------------
x_l dd ?
y_l dd ?
x_r dd ?
y_r dd ?
_dx dd ?
_dy dd ?
sx dd ?
sy dd ?
z dd ?
e dd ?
i dd ?
_ch dd ?
x2 dd ?
y2 dd ?
d dd ?
r dd ?
m_x dd ?
m_y dd ?
c dd ?
c_f dd ?
l_c dd ?
l_s dd ?
;---------------------------
pointer_to_screen dd 0
screen_size_x dd 0
output_array dd 0
pixel_x dd 0
pixel_y dd 0
;---------------------------
a dd 0
b dd 0
col dd 0
row dd 0
bnew dd 0
a_square dd 0
b_square dd 0
two_a_square dd 0
two_b_square dd 0
four_a_square dd 0
four_b_square dd 0
;-----------------------------
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