Initial code for NtUserGetDC

svn path=/trunk/; revision=3387

reactos/include/defines.h

@@ -1291,6 +1291,8 @@ extern "C" {
 #define DCX_EXCLUDERGN	(0x40L)
 #define DCX_INTERSECTRGN	(0x80L)
 #define DCX_VALIDATE	(0x200000L)
+#define DCX_USESTYLE         (0x00010000L)
+#define DCX_NORECOMPUTE      (0x00100000L)
 
 /* GetDeviceCaps */
 #define DRIVERVERSION	(0)

reactos/include/user32/wininternal.h

@@ -1,5 +1,9 @@
 #define WIN_NCACTIVATED  (0x0080)
 
-#define DCX_KEEPCLIPRGN (0x40000)
+/* internal DCX flags */
-#define DCX_USESTYLE    (0x10000)
+#define DCX_DCEEMPTY		0x00000800
-#define DCX_WINDOWPAINT (0x20000)
+#define DCX_DCEBUSY		0x00001000
+#define DCX_DCEDIRTY		0x00002000
+#define DCX_WINDOWPAINT		0x00020000
+#define DCX_KEEPCLIPRGN		0x00040000
+#define DCX_NOCLIPCHILDREN      0x00080000

reactos/include/win32k/gdiobj.h

@@ -23,6 +23,7 @@
 #define GO_METAFILE_DC_MAGIC     0x4f51
 #define GO_ENHMETAFILE_MAGIC     0x4f52
 #define GO_ENHMETAFILE_DC_MAGIC  0x4f53
+#define GO_DCE_MAGIC             0x4f54
 #define GO_MAGIC_DONTCARE        0xffff
 
 /* (RJJ) swiped stock handles from wine  */

reactos/include/win32k/ntuser.h

@@ -616,11 +616,9 @@ NtUserGetCursorInfo(
 
 DWORD
 STDCALL
-NtUserGetDC(
+NtUserGetDC(HWND hWnd);
-  DWORD Unknown0);
 
-HDC STDCALL
+HDC STDCALL NtUserGetDCEx(HWND hWnd, HANDLE hRegion, ULONG Flags);
-NtUserGetDCEx(HWND hWnd, HANDLE hRegion, ULONG Flags);
 
 DWORD
 STDCALL

reactos/lib/user32/windows/dc.c

@@ -16,7 +16,7 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
-/* $Id: dc.c,v 1.6 2002/06/13 20:36:40 dwelch Exp $
+/* $Id: dc.c,v 1.7 2002/08/24 11:09:17 jfilby Exp $
  *
  * PROJECT:         ReactOS user32.dll
  * FILE:            lib/user32/windows/input.c
@@ -39,7 +39,7 @@ STDCALL
 GetDC(
   HWND hWnd)
 {
-  return (HDC)0;
+  return NtUserGetDC(hWnd);
 }
 
 HDC
@@ -49,7 +49,7 @@ GetDCEx(
   HRGN hrgnClip,
   DWORD flags)
 {
-  return (HDC)0;
+  return NtUserGetDCEx(hWnd, hrgnClip, flags);
 }
 HDC
 STDCALL

reactos/subsys/win32k/include/window.h

@@ -6,6 +6,7 @@
 #include <include/class.h>
 #include <include/msgqueue.h>
 #include <include/winsta.h>
+#include <include/dce.h>
 
 typedef struct _INTERNALPOS
 {
@@ -72,6 +73,8 @@ typedef struct _WINDOW_OBJECT
   LIST_ENTRY ThreadListEntry;
   /* Pointer to the parent window. */
   struct _WINDOW_OBJECT* Parent;
+  /* DC Entries (DCE) */
+  PDCE dce;
 } WINDOW_OBJECT, *PWINDOW_OBJECT;
 
 /* Window flags. */

reactos/subsys/win32k/ntuser/stubs.c

@@ -825,16 +825,6 @@ NtUserGetCursorInfo(
   return 0;
 }
 
-DWORD
-STDCALL
-NtUserGetDC(
-  DWORD Unknown0)
-{
-  UNIMPLEMENTED
-
-  return 0;
-}
-
 DWORD
 STDCALL
 NtUserGetDoubleClickTime(VOID)
@@ -1424,6 +1414,7 @@ NtUserScrollDC(
   DWORD Unknown4,
   DWORD Unknown5,
   DWORD Unknown6)
+
 {
   UNIMPLEMENTED
 

reactos/subsys/win32k/ntuser/windc.c

@@ -1,4 +1,4 @@
-/* $Id: windc.c,v 1.2 2002/07/17 21:04:57 dwelch Exp $
+/* $Id: windc.c,v 1.3 2002/08/24 11:09:17 jfilby Exp $
  *
  * COPYRIGHT:        See COPYING in the top level directory
  * PROJECT:          ReactOS kernel
@@ -20,12 +20,19 @@
 #include <include/msgqueue.h>
 #include <include/window.h>
 #include <include/rect.h>
+#include <include/dce.h>
 
 #define NDEBUG
 #include <debug.h>
 
+static PDCE firstDCE;
+
 /* FUNCTIONS *****************************************************************/
 
+VOID DCE_FreeWindowDCE(HWND);
+INT  DCE_ExcludeRgn(HDC, HWND, HRGN);
+BOOL DCE_InvalidateDCE(HWND, const PRECTL);
+
 BOOL STATIC
 DceGetVisRect(PWINDOW_OBJECT Window, BOOL ClientArea, RECT* Rect)
 {
@@ -225,10 +232,167 @@ NtUserReleaseDC(HWND hWnd, HDC hDc)
   
 }
 
+DWORD
+STDCALL
+NtUserGetDC(HWND hWnd)
+{
+    if (!hWnd)
+        return NtUserGetDCEx(0, 0, DCX_CACHE | DCX_WINDOW);
+    return NtUserGetDCEx(hWnd, 0, DCX_USESTYLE);
+}
+
 HDC STDCALL
 NtUserGetDCEx(HWND hWnd, HANDLE hRegion, ULONG Flags)
 {
-  
+    HDC 	hdc = 0;
+    HDCE	hdce;
+    PDCE	dce;
+    DWORD 	dcxFlags = 0;
+    BOOL	bUpdateVisRgn = TRUE;
+    BOOL	bUpdateClipOrigin = FALSE;
+    HWND parent, full;
+    PWINDOW_OBJECT Window;
+
+    DPRINT("hWnd %04x, hRegion %04x, Flags %08x\n", hWnd, hRegion, (unsigned)Flags);
+
+    if (!hWnd) hWnd = W32kGetDesktopWindow();
+    if (!(Window = W32kGetWindowObject(hWnd))) return 0;
+
+    // fixup flags
+
+    if (Flags & (DCX_WINDOW | DCX_PARENTCLIP)) Flags |= DCX_CACHE;
+
+    if (Flags & DCX_USESTYLE)
+    {
+	Flags &= ~(DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
+
+        if(Window->Style & WS_CLIPSIBLINGS)
+            Flags |= DCX_CLIPSIBLINGS;
+
+	if (!(Flags & DCX_WINDOW))
+	{
+            if (Window->ExStyle & CS_PARENTDC) Flags |= DCX_PARENTCLIP;
+
+	    if (Window->Style & WS_CLIPCHILDREN &&
+                     !(Window->Style & WS_MINIMIZE)) Flags |= DCX_CLIPCHILDREN;
+            if (!Window->dce) Flags |= DCX_CACHE;
+	}
+    }
+
+    if (Flags & DCX_WINDOW) Flags &= ~DCX_CLIPCHILDREN;
+
+    parent = W32kGetParentWindow(hWnd);
+    if (!parent || (parent == W32kGetDesktopWindow()))
+        Flags = (Flags & ~DCX_PARENTCLIP) | DCX_CLIPSIBLINGS;
+
+    // it seems parent clip is ignored when clipping siblings or children
+    if (Flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) Flags &= ~DCX_PARENTCLIP;
+
+    if(Flags & DCX_PARENTCLIP)
+    {
+        LONG parent_style = NtUserGetWindowLong(parent, GWL_STYLE);
+        if((Window->Style & WS_VISIBLE) && (parent_style & WS_VISIBLE))
+        {
+            Flags &= ~DCX_CLIPCHILDREN;
+            if (parent_style & WS_CLIPSIBLINGS) Flags |= DCX_CLIPSIBLINGS;
+        }
+    }
+
+    // find a suitable DCE
+
+    dcxFlags = Flags & (DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
+		        DCX_CACHE | DCX_WINDOW);
+
+    if (Flags & DCX_CACHE)
+    {
+	PDCE dceEmpty;
+	PDCE dceUnused;
+
+	dceEmpty = dceUnused = NULL;
+
+	/* Strategy: First, we attempt to find a non-empty but unused DCE with
+	 * compatible flags. Next, we look for an empty entry. If the cache is
+	 * full we have to purge one of the unused entries.
+	 */
+
+	for (dce = firstDCE; (dce); dce = dce->next)
+	{
+	    if ((dce->DCXflags & (DCX_CACHE | DCX_DCEBUSY)) == DCX_CACHE)
+	    {
+		dceUnused = dce;
+
+		if (dce->DCXflags & DCX_DCEEMPTY)
+		    dceEmpty = dce;
+		else
+		if ((dce->hwndCurrent == hWnd) &&
+		   ((dce->DCXflags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
+				      DCX_CACHE | DCX_WINDOW | DCX_PARENTCLIP)) == dcxFlags))
+		{
+		    DPRINT("Found valid %08x dce [%04x], flags %08x\n",
+					(unsigned)dce, hWnd, (unsigned)dcxFlags);
+		    bUpdateVisRgn = FALSE;
+		    bUpdateClipOrigin = TRUE;
+		    break;
+		}
+	    }
+	}
+
+	if (!dce) dce = (dceEmpty) ? dceEmpty : dceUnused;
+
+        // if there's no dce empty or unused, allocate a new one
+        if (!dce)
+        {
+            hdce = DCEOBJ_AllocDCE();
+            if (hdce == NULL)
+            {
+                return 0;
+            }
+            dce = DCEOBJ_LockDCE(hdce);
+            dce->type = DCE_CACHE_DC;
+        }
+    }
+    else
+    {
+        dce = Window->dce;
+        if (dce && dce->hwndCurrent == hWnd)
+	{
+	    DPRINT("skipping hVisRgn update\n");
+	    bUpdateVisRgn = FALSE; // updated automatically, via DCHook()
+	}
+    }
+    if (!dce)
+    {
+        hdc = 0;
+        goto END;
+    }
+
+    if (!(Flags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN))) hRegion = 0;
+
+    if (((Flags ^ dce->DCXflags) & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) &&
+        (dce->hClipRgn != hRegion))
+    {
+        // if the extra clip region has changed, get rid of the old one
+/*        DCE_DeleteClipRgn(dce); */
+    }
+
+    dce->hwndCurrent = hWnd;
+    dce->hClipRgn = hRegion;
+    dce->DCXflags = Flags & (DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN |
+                             DCX_CACHE | DCX_WINDOW | DCX_WINDOWPAINT |
+                             DCX_KEEPCLIPRGN | DCX_INTERSECTRGN | DCX_EXCLUDERGN);
+    dce->DCXflags |= DCX_DCEBUSY;
+    dce->DCXflags &= ~DCX_DCEDIRTY;
+    hdc = dce->hDC;
+
+/*    if (bUpdateVisRgn) SetHookFlags(hdc, DCHF_INVALIDATEVISRGN); // force update */
+
+/*    if (!USER_Driver.pGetDC(hWnd, hdc, hRegion, Flags)) hdc = 0; */
+
+    DPRINT("(%04x,%04x,0x%lx): returning %04x\n", hWnd, hRegion, Flags, hdc);
+
+END:
+/*    WIN_ReleasePtr(Window); */
+    return hdc;
 }
 
 /* EOF */

reactos/subsys/win32k/ntuser/window.c

@@ -1,4 +1,4 @@
-/* $Id: window.c,v 1.9 2002/07/17 21:04:57 dwelch Exp $
+/* $Id: window.c,v 1.10 2002/08/24 11:09:17 jfilby Exp $
  *
  * COPYRIGHT:        See COPYING in the top level directory
  * PROJECT:          ReactOS kernel
@@ -85,6 +85,16 @@ W32kIsDesktopWindow(HWND hWnd)
   return(IsDesktop);
 }
 
+HWND W32kGetDesktopWindow()
+{
+  return W32kGetActiveDesktop()->DesktopWindow;
+}
+
+HWND W32kGetParentWindow(HWND hWnd)
+{
+  return W32kGetWindowObject(hWnd)->ParentHandle;
+}
+
 PWINDOW_OBJECT
 W32kGetWindowObject(HWND hWnd)
 {
@@ -776,6 +786,7 @@ NtUserSetInternalWindowPos(DWORD Unknown0,
   UNIMPLEMENTED
 
   return 0;
+
 }
 
 DWORD STDCALL