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 @@
     δγ­<CEB3>ζ¨ξ αΰ §γ ―®α«¥ ―®«γη¥­¨ο α®΅λβ¨ο:
              5 = § Ά¥ΰ訫 αμ ―¥ΰ¥ΰ¨α®Ά<C2AE>  δ®­  ΰ ΅®η¥£® αβ®« 
 
+======================================================================
+====================== ”ã­ªæ¨ï 15, ¯®¤äã­ªæ¨ï 9 ======================
+=============== <20>¥à¥à¨á®¢ âì ¯àאַ㣮«ì­ãî ç áâì ä®­ . ===============
+======================================================================
+<EFBFBD> à ¬¥âàë:
+  * eax = 15 - ­®¬¥à ä㭪樨
+  * ebx = 9 - ­®¬¥à ¯®¤ä㭪樨
+  * ecx = [left]*65536 + [right]
+  * edx = [top]*65536 + [bottom]
+‚®§¢à é ¥¬®¥ §­ ç¥­¨¥:
+  * äã­ªæ¨ï ­¥ ¢®§¢à é ¥â §­ ç¥­¨ï
+‡ ¬¥ç ­¨ï:
+  * (left,top) - ª®®à¤¨­ âë «¥¢®£® ¢¥àå­¥£® 㣫 ,
+    (right,bottom) - ª®®à¤¨­ âë ¯à ¢®£® ­¨¦­¥£®.
+  * …᫨ ¯ à ¬¥âàë ãáâ ­®¢«¥­ë ­¥ª®à४⭮ - ä®­ ­¥ ¯¥à¥à¨á®¢ë¢ ¥âáï.
+
 ======================================================================
 ============= ”γ­<CEB3>ζ¨ο 16 - α®εΰ ­¨βμ ΰ ¬¤¨α<C2A8> ­  ¤¨α<C2A8>¥βγ. =============
 ======================================================================

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