[fireball] 50394: - Solve one of the most visible and historical drawing problem of arwinss: improper clipping. E.g. child windows borders being "visible" in an explorer window is an example, FAP d...

Author: fireball
Date: Sat Jan 15 21:33:09 2011
New Revision: 50394

URL: http://svn.reactos.org/svn/reactos?rev=50394&view=rev
Log:
- Solve one of the most visible and historical drawing problem of arwinss: improper
clipping. E.g. child windows borders being "visible" in an explorer window is an
example, FAP drawing issues an another. All redrawing bugs should be retested to see
what's fixed.
- Add a "clipchildren" property to the DC. This property affects only those DCs
which have a root window (screen) selected. A better name for this variable would be
welcome.
- Important! The change in behaviour introduced by ClipChildren is currently commented out
until some issues it brings are solved.

Modified:
    branches/arwinss/reactos/subsystems/win32/win32k/gdi/dc.c
    branches/arwinss/reactos/subsystems/win32/win32k/include/dc.h

Modified: branches/arwinss/reactos/subsystems/win32/win32k/gdi/dc.c
URL:
http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/subsystems/win3…
==============================================================================
--- branches/arwinss/reactos/subsystems/win32/win32k/gdi/dc.c [iso-8859-1] (original)
+++ branches/arwinss/reactos/subsystems/win32/win32k/gdi/dc.c [iso-8859-1] Sat Jan 15
21:33:09 2011
@@ -169,6 +169,7 @@
     /* Create an empty combined clipping region */
     pNewDC->CombinedClip = EngCreateClip();
     pNewDC->Clipping = NULL;
+    pNewDC->ClipChildren = FALSE;
 
     /* Set default palette */
     pNewDC->dclevel.hpal = StockObjects[DEFAULT_PALETTE];
@@ -487,6 +488,12 @@
             return;
         }
 
+        /* Root window's visibility may be ignored */
+        if ((pDC->pWindow == &SwmRoot) && !pDC->ClipChildren)
+        {
+            //IgnoreVisibility = TRUE;
+        }
+
         /* window visibility X user clipping (if any) X underlying surface */
 
         /* Acquire SWM lock */
@@ -598,6 +605,10 @@
         /* Set the clipping object */
         pDC->Clipping = create_region_from_rects(pSafeRects, count);
     }
+    else
+    {
+        pDC->Clipping = create_empty_region();
+    }
 
     DPRINT("RosGdiSetDeviceClipping() for DC %x, bounding rect (%d,%d)-(%d,
%d)\n",
         physDev, rcSafeBounds.left, rcSafeBounds.top, rcSafeBounds.right,
rcSafeBounds.bottom);
@@ -693,6 +704,10 @@
         pDC->pWindow = NULL;
         DPRINT("hdc %x, restricting any drawing\n", physDev);
     }
+
+    pDC->ClipChildren = clipChildren;
+
+    RosGdiUpdateClipping(pDC, FALSE);
 
     /* Release the object */
     DC_UnlockDc(pDC);

Modified: branches/arwinss/reactos/subsystems/win32/win32k/include/dc.h
URL:
http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/subsystems/win3…
==============================================================================
--- branches/arwinss/reactos/subsystems/win32/win32k/include/dc.h [iso-8859-1] (original)
+++ branches/arwinss/reactos/subsystems/win32/win32k/include/dc.h [iso-8859-1] Sat Jan 15
21:33:09 2011
@@ -38,6 +38,7 @@
     struct region *Clipping;
     CLIPOBJ      *CombinedClip;
     PSWM_WINDOW  pWindow;
+    BOOLEAN ClipChildren;
 } DC, *PDC;
 
 #define  DC_LockDc(hDC)  \