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Rev 543 Rev 546
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;;
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include 'macros.inc'
 56 
include 'macros.inc'
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 57 
 
58 
$Revision: 543 $
 58 
$Revision: 546 $
59 
 
 59 
 
Line 2344... Line 2344...
2344 
  yes_floppy_save:
 2344 
  yes_floppy_save:
2345 
    ret
 2345 
    ret
Line 2346... Line 2346...
2346 
 
 2346 
 
2347 
uglobal
 2347 
uglobal
- 
 
 2348 
;  bgrchanged  dd  0x0
- 
 
 2349 
bgrlock db 0
2348 
;  bgrchanged  dd  0x0
 2350 
bgrlockpid dd 0
Line 2349... Line 2351...
2349 
endg
 2351 
endg
Line 2350... Line 2352...
2350 
 
 2352 
 
2351 
sys_background:
 2353 
sys_background:
2352 
 
 2354 
 
2353 
    cmp   eax,1                            ; BACKGROUND SIZE
 2355 
    cmp   eax,1                            ; BACKGROUND SIZE
2354 
    jnz   nosb1
 2356 
    jnz   nosb1
2355 
    cmp   ebx,0
 2357 
    cmp   ebx,0
- 
 
 2358 
    je    sbgrr
- 
 
 2359 
    cmp   ecx,0
- 
 
 2360 
    je    sbgrr
- 
 
 2361 
@@:
- 
 
 2362 
        mov     al, 1
- 
 
 2363 
        xchg    [bgrlock], al
- 
 
 2364 
        test    al, al
- 
 
 2365 
        jz      @f
2356 
    je    sbgrr
 2366 
        call    change_task
2357 
    cmp   ecx,0
 2367 
        jmp     @b
2358 
    je    sbgrr
 2368 
@@:
Line 2359... Line 2369...
2359 
    mov   [BgrDataWidth],ebx
 2369 
    mov   [BgrDataWidth],ebx
Line 2377... Line 2387...
2377 
    mov  eax,[BgrDataWidth]
 2387 
    mov  eax,[BgrDataWidth]
2378 
    imul eax,[BgrDataHeight]
 2388 
    imul eax,[BgrDataHeight]
2379 
    lea  eax,[eax*3]
 2389 
    lea  eax,[eax*3]
2380 
    mov  [mem_BACKGROUND],eax
 2390 
    mov  [mem_BACKGROUND],eax
2381 
; get memory for new background
 2391 
; get memory for new background
2382 
    stdcall kernel_alloc, [mem_BACKGROUND]
 2392 
    stdcall kernel_alloc, eax
2383 
    test eax, eax
 2393 
    test eax, eax
2384 
    jz .exit_mem
 2394 
    jz .exit_mem
2385 
    mov [img_background], eax
 2395 
    mov [img_background], eax
2386 
.exit_mem:
 2396 
.exit_mem:
2387 
    popad
 2397 
    popad
- 
 
 2398 
        mov     [bgrlock], 0
Line 2388... Line 2399...
2388 
 
 2399 
 
2389 
  sbgrr:
 2400 
  sbgrr:
Line 2390... Line 2401...
2390 
    ret
 2401 
    ret
Line 2442... Line 2453...
2442 
    call  memmove
 2453 
    call  memmove
2443 
  .fin:
 2454 
  .fin:
2444 
    ret
 2455 
    ret
2445 
  nosb5:
 2456 
  nosb5:
Line -... Line 2457...
- 
 
 2457 
 
- 
 
 2458 
        cmp     eax, 6
- 
 
 2459 
        jnz     nosb6
- 
 
 2460 
@@:
- 
 
 2461 
        mov     al, 1
- 
 
 2462 
        xchg    [bgrlock], al
- 
 
 2463 
        test    al, al
- 
 
 2464 
        jz      @f
- 
 
 2465 
        call    change_task
- 
 
 2466 
        jmp     @b
- 
 
 2467 
@@:
- 
 
 2468 
        mov     eax, [CURRENT_TASK]
- 
 
 2469 
        mov     [bgrlockpid], eax
- 
 
 2470 
        stdcall user_alloc, [mem_BACKGROUND]
- 
 
 2471 
        mov     [esp+36], eax
- 
 
 2472 
        test    eax, eax
- 
 
 2473 
        jz      .nomem
- 
 
 2474 
        mov     ebx, eax
- 
 
 2475 
        shr     ebx, 12
- 
 
 2476 
        or      dword [page_tabs+(ebx-1)*4], DONT_FREE_BLOCK
- 
 
 2477 
        mov     esi, [img_background]
- 
 
 2478 
        shr     esi, 12
- 
 
 2479 
        mov     ecx, [mem_BACKGROUND]
- 
 
 2480 
        add     ecx, 0xFFF
- 
 
 2481 
        shr     ecx, 12
- 
 
 2482 
.z:
- 
 
 2483 
        mov     eax, [page_tabs+ebx*4]
- 
 
 2484 
        test    al, 1
- 
 
 2485 
        jz      @f
- 
 
 2486 
        call    free_page
- 
 
 2487 
@@:
- 
 
 2488 
        mov     eax, [page_tabs+esi*4]
- 
 
 2489 
        or      al, PG_UW
- 
 
 2490 
        mov     [page_tabs+ebx*4], eax
- 
 
 2491 
        mov     eax, ebx
- 
 
 2492 
        shl     eax, 12
- 
 
 2493 
        invlpg  [eax]
- 
 
 2494 
        inc     ebx
- 
 
 2495 
        inc     esi
- 
 
 2496 
        loop    .z
- 
 
 2497 
        ret
- 
 
 2498 
.nomem:
- 
 
 2499 
        and     [bgrlockpid], 0
- 
 
 2500 
        mov     [bgrlock], 0
- 
 
 2501 
nosb6:
- 
 
 2502 
        cmp     eax, 7
- 
 
 2503 
        jnz     nosb7
- 
 
 2504 
        cmp     [bgrlock], 0
- 
 
 2505 
        jz      .err
- 
 
 2506 
        mov     eax, [CURRENT_TASK]
- 
 
 2507 
        cmp     [bgrlockpid], eax
- 
 
 2508 
        jnz     .err
- 
 
 2509 
        mov     eax, ebx
- 
 
 2510 
        shr     eax, 12
- 
 
 2511 
        mov     ecx, [page_tabs+(eax-1)*4]
- 
 
 2512 
        test    cl, USED_BLOCK+DONT_FREE_BLOCK
- 
 
 2513 
        jz      .err
- 
 
 2514 
        jnp     .err
- 
 
 2515 
        push    eax
- 
 
 2516 
        shr     ecx, 12
- 
 
 2517 
@@:
- 
 
 2518 
        and     dword [page_tabs+eax*4], 0
- 
 
 2519 
        mov     edx, eax
- 
 
 2520 
        shl     edx, 12
- 
 
 2521 
        invlpg  [edx]
- 
 
 2522 
        inc     eax
- 
 
 2523 
        loop    @b
- 
 
 2524 
        pop     eax
- 
 
 2525 
        and     dword [page_tabs+(eax-1)*4], not DONT_FREE_BLOCK
- 
 
 2526 
        stdcall user_free, ebx
- 
 
 2527 
        mov     [esp+36], eax
- 
 
 2528 
        and     [bgrlockpid], 0
- 
 
 2529 
        mov     [bgrlock], 0
- 
 
 2530 
        ret
- 
 
 2531 
.err:
- 
 
 2532 
        and     dword [esp+36], 0
- 
 
 2533 
        ret
- 
 
 2534 
 
2446 
 
 2535 
nosb7:
Line 2447... Line 2536...
2447 
    ret
 2536 
    ret