Function 15.9 - Redraws a rectangular part of the background

git-svn-id: svn://kolibrios.org@2547 a494cfbc-eb01-0410-851d-a64ba20cac60

kernel/trunk/docs/sysfuncr.txt

@@ -635,6 +635,22 @@
     <20>㭪<EFBFBD><E3ADAA><EFBFBD> <20>ࠧ<EFBFBD> <20><>᫥ <20><><EFBFBD><EFBFBD>祭<EFBFBD><E7A5AD> ᮡ<><E1AEA1><EFBFBD><EFBFBD>:
              5 = <20><><EFBFBD><EFBFBD><EFBFBD>訫<EFBFBD><E8A8AB><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᮢ<EFBFBD><E1AEA2> 䮭<> ࠡ<>祣<EFBFBD> <20>⮫<EFBFBD>
 
+======================================================================
+====================== <20>㭪<EFBFBD><E3ADAA><EFBFBD> 15, <20><><EFBFBD><EFBFBD>㭪<EFBFBD><E3ADAA><EFBFBD> 9 ======================
+=============== <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᮢ<EFBFBD><E1AEA2><EFBFBD> <20><>אַ㣮<EFACAE><E3A3AE><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> 䮭<>. ===============
+======================================================================
+<EFBFBD><EFBFBD>ࠬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
+  * eax = 15 - <20><><EFBFBD><EFBFBD><EFBFBD> <20>㭪樨
+  * ebx = 9 - <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>㭪樨
+  * ecx = [left]*65536 + [right]
+  * edx = [top]*65536 + [bottom]
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>頥<EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>祭<EFBFBD><E7A5AD>:
+  * <20>㭪<EFBFBD><E3ADAA><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>頥<EFBFBD> <20><><EFBFBD>祭<EFBFBD><E7A5AD>
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>砭<EFBFBD><EFBFBD>:
+  * (left,top) - <20><><EFBFBD>न<EFBFBD><E0A4A8><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>孥<EFBFBD><E5ADA5> 㣫<>,
+    (right,bottom) - <20><><EFBFBD>न<EFBFBD><E0A4A8><EFBFBD><EFBFBD> <20>ࠢ<EFBFBD><E0A0A2><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
+  * <20>᫨ <20><>ࠬ<EFBFBD><E0A0AC><EFBFBD><EFBFBD> <20><>⠭<EFBFBD><E2A0AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>४⭮ - 䮭 <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᮢ뢠<E1AEA2><EBA2A0><EFBFBD><EFBFBD>.
+
 ======================================================================
 ============= <20>㭪<EFBFBD><E3ADAA><EFBFBD> 16 - <20><><EFBFBD>࠭<EFBFBD><E0A0AD><EFBFBD> ࠬ<><E0A0AC><EFBFBD><EFBFBD> <20><> <20><>᪥<EFBFBD><E1AAA5>. =============
 ======================================================================

kernel/trunk/docs/sysfuncs.txt

@@ -629,6 +629,22 @@ Remarks:
     immediately after the event:
              5 = kernel finished redrawing of the desktop background
 
+======================================================================
+===================== Function 15, subfunction 9 =====================
+============= Redraws a rectangular part of the background ===========
+======================================================================
+Parameters:
+  * eax = 15 - function number
+  * ebx = 9 - subfunction number
+  * ecx = [left]*65536 + [right]
+  * edx = [top]*65536 + [bottom]
+Returned value:
+  * function does not return value
+Remarks:
+  * (left,top) are coordinates of the left upper corner,
+    (right,bottom) are coordinates of the right lower one.
+  * If parameters are set incorrectly then background is not redrawn.
+
 ======================================================================
 =============== Function 16 - save ramdisk on a floppy. ==============
 ======================================================================

kernel/trunk/kernel.asm

@@ -2425,10 +2425,9 @@ sys_background:
         cmp     ebx, 1                     ; BACKGROUND SIZE
         jnz     nosb1
         test    ecx, ecx
-;    cmp   ecx,0
         jz      sbgrr
+
         test    edx, edx
-;    cmp   edx,0
         jz      sbgrr
 ;--------------------------------------
 align 4
@@ -2698,6 +2697,49 @@ nosb7:
 ;------------------------------------------------------------------------------
 align 4
 nosb8:
+        cmp     ebx, 9
+        jnz     nosb9
+; ecx = [left]*65536 + [right]
+; edx = [top]*65536 + [bottom]
+        mov     eax, [Screen_Max_X]
+        mov     ebx, [Screen_Max_Y]
+; check [right]
+        cmp     cx, ax
+        ja      .exit
+; check [left]
+        ror     ecx, 16
+        cmp     cx, ax
+        ja      .exit
+; check [bottom]
+        cmp     dx, bx
+        ja      .exit
+; check [top]
+        ror     edx, 16
+        cmp     dx, bx
+        ja      .exit
+
+        movzx   eax, cx  ; [left]
+        movzx   ebx, dx  ; [top]
+
+        shr     ecx, 16 ; [right]
+        shr     edx, 16 ; [bottom]
+
+        mov     [background_defined], 1
+
+        mov     [draw_data+32 + RECT.left], eax
+        mov     [draw_data+32 + RECT.top], ebx
+
+        mov     [draw_data+32 + RECT.right], ecx
+        mov     [draw_data+32 + RECT.bottom], edx
+
+        inc     byte[REDRAW_BACKGROUND]
+;--------------------------------------
+align 4
+.exit:
+        ret
+;------------------------------------------------------------------------------
+align 4
+nosb9:
         ret
 ;------------------------------------------------------------------------------
 align 4