[fireball] 50127: - Support scenario when GetDC() is performed on an invisible window. Previously, this problem led to getting DC of a whole screen, but the proper solution is to restrict any drawi...

Author: fireball
Date: Fri Dec 24 17:34:14 2010
New Revision: 50127

URL: http://svn.reactos.org/svn/reactos?rev=50127&view=rev
Log:
- Support scenario when GetDC() is performed on an invisible window. Previously, this problem led to getting DC of a whole screen, but the proper solution is to restrict any drawing to such DC. This fixes drawing issues in GTK based apps.
- Add get_device_rect (from Wine source code) and use it to map coordinates in Rectangle implementation.
- Silence IsSelectionOwner() debug print.

Modified:
    branches/arwinss/reactos/dll/win32/winent.drv/clipboard.c
    branches/arwinss/reactos/dll/win32/winent.drv/gdidrv.c
    branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c

Modified: branches/arwinss/reactos/dll/win32/winent.drv/clipboard.c
URL: http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/dll/win32/winent...
==============================================================================
--- branches/arwinss/reactos/dll/win32/winent.drv/clipboard.c [iso-8859-1] (original)
+++ branches/arwinss/reactos/dll/win32/winent.drv/clipboard.c [iso-8859-1] Fri Dec 24 17:34:14 2010
@@ -2437,7 +2437,7 @@
  */
 static BOOL NTDRV_CLIPBOARD_IsSelectionOwner(void)
 {
-    UNIMPLEMENTED;
+    //UNIMPLEMENTED;
     //return selectionAcquired;
     return TRUE;
 }

Modified: branches/arwinss/reactos/dll/win32/winent.drv/gdidrv.c
URL: http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/dll/win32/winent...
==============================================================================
--- branches/arwinss/reactos/dll/win32/winent.drv/gdidrv.c [iso-8859-1] (original)
+++ branches/arwinss/reactos/dll/win32/winent.drv/gdidrv.c [iso-8859-1] Fri Dec 24 17:34:14 2010
@@ -31,6 +31,38 @@

BOOL CDECL RosDrv_PatBlt( NTDRV_PDEVICE *physDev, INT left, INT top, INT width, INT height, DWORD rop );

+/* get the rectangle in device coordinates, with optional mirroring */
+static RECT get_device_rect( HDC hdc, int left, int top, int right, int bottom )
+{
+    RECT rect;
+
+    rect.left   = left;
+    rect.top    = top;
+    rect.right  = right;
+    rect.bottom = bottom;
+    if (GetLayout( hdc ) & LAYOUT_RTL)
+    {
+        /* shift the rectangle so that the right border is included after mirroring */
+        /* it would be more correct to do this after LPtoDP but that's not what Windows does */
+        rect.left--;
+        rect.right--;
+    }
+    LPtoDP( hdc, (POINT *)&rect, 2 );
+    if (rect.left > rect.right)
+    {
+        int tmp = rect.left;
+        rect.left = rect.right;
+        rect.right = tmp;
+    }
+    if (rect.top > rect.bottom)
+    {
+        int tmp = rect.top;
+        rect.top = rect.bottom;
+        rect.bottom = tmp;
+    }
+    return rect;
+}
+
 BOOL CDECL RosDrv_AlphaBlend(NTDRV_PDEVICE *physDevDst, INT xDst, INT yDst, INT widthDst, INT heightDst,
                              NTDRV_PDEVICE *physDevSrc, INT xSrc, INT ySrc, INT widthSrc, INT heightSrc,
                              BLENDFUNCTION blendfn)
@@ -317,8 +349,6 @@
 INT CDECL RosDrv_ExtEscape( NTDRV_PDEVICE *physDev, INT escape, INT in_count, LPCVOID in_data,
                             INT out_count, LPVOID out_data )
 {
-    HWND hwnd;
-
     switch(escape)
     {
     case NTDRV_ESCAPE:
@@ -333,10 +363,8 @@

RosGdiSetDcRects(physDev->hKernelDC, (RECT*)&data->dc_rect, (RECT*)&data->drawable_rect);

-                    hwnd = GetAncestor(data->hwnd, GA_ROOT);
-
                     if (!data->release)
-                        RosGdiGetDC(physDev->hKernelDC, hwnd, data->clip_children);
+                        RosGdiGetDC(physDev->hKernelDC, data->hwnd, data->clip_children);
                     else
                         RosGdiReleaseDC(physDev->hKernelDC);

@@ -613,11 +641,7 @@
 BOOL CDECL RosDrv_Rectangle(NTDRV_PDEVICE *physDev, INT left, INT top, INT right, INT bottom)
 {
     POINT ptBrush;
-    RECT rc;
-
-    /* Convert coordinates */
-    SetRect(&rc, left, top, right, bottom);
-    LPtoDP(physDev->hUserDC, (POINT*)&rc, 2);
+    RECT rc = get_device_rect( physDev->hUserDC, left, top, right, bottom );

if ((rc.left == rc.right) || (rc.top == rc.bottom)) return TRUE;

Modified: branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c
URL: http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/dll/win32/winent...
==============================================================================
--- branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c [iso-8859-1] (original)
+++ branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c [iso-8859-1] Fri Dec 24 17:34:14 2010
@@ -360,40 +360,13 @@
 {
     struct ntdrv_escape_set_drawable escape;
     struct ntdrv_win_data *data = NTDRV_get_win_data( hwnd );
+    //HWND parent;

escape.code        = NTDRV_SET_DRAWABLE;
     escape.clip_children = FALSE;
     escape.gl_copy     = FALSE;
-    escape.hwnd        = hwnd;
+    escape.hwnd        = 0;
     escape.release     = FALSE;
-
-    if (top == hwnd && data && IsIconic( hwnd ) /*&& data->icon_window*/)
-    {
-        //escape.drawable = data->icon_window;
-    }
-    else if (top == hwnd)
-    {
-        //escape.fbconfig_id = data ? data->fbconfig_id : (XID)GetPropA( hwnd, fbconfig_id_prop );
-        /* GL draws to the client area even for window DCs */
-        /*escape.gl_drawable = data ? data->client_window : X11DRV_get_client_window( hwnd );
-        if (flags & DCX_WINDOW)
-            escape.drawable = data ? data->whole_window : X11DRV_get_whole_window( hwnd );
-        else
-            escape.drawable = escape.gl_drawable;*/
-    }
-    else
-    {
-        //escape.drawable    = X11DRV_get_client_window( top );
-        //escape.fbconfig_id = data ? data->fbconfig_id : (XID)GetPropA( hwnd, fbconfig_id_prop );
-        //escape.gl_drawable = data ? data->gl_drawable : (Drawable)GetPropA( hwnd, gl_drawable_prop );
-        //escape.pixmap      = data ? data->pixmap : (Pixmap)GetPropA( hwnd, pixmap_prop );
-        //escape.gl_copy     = (escape.gl_drawable != 0);
-
-        if (flags & DCX_CLIPCHILDREN) escape.clip_children = TRUE;
-    }
-
-    //FIXME("hdc %x, hwnd %x, top %x\n win_rect %s, top_rect %s\n", hdc, hwnd, top,
-    //    wine_dbgstr_rect(win_rect), wine_dbgstr_rect(top_rect));

escape.dc_rect.left         = win_rect->left - top_rect->left;
     escape.dc_rect.top          = win_rect->top - top_rect->top;
@@ -403,6 +376,69 @@
     escape.drawable_rect.top    = top_rect->top;
     escape.drawable_rect.right  = top_rect->right;
     escape.drawable_rect.bottom = top_rect->bottom;
+
+    if (top == hwnd)
+    {
+        //if (flags & DCX_WINDOW)
+        {
+            if (data)
+            {
+                /* SWM window already exists */
+                escape.hwnd = hwnd;
+            }
+            else
+            {
+                /* There is no SWM window for this hwnd.
+                   If this is desktop, it's fine otherwise reject any drawing operations */
+                if (hwnd == GetDesktopWindow())
+                    escape.hwnd = hwnd;
+                else
+                    escape.hwnd = 0;
+            }
+        }
+    }
+    else
+    {
+#if 0
+        /* find the first ancestor that has a drawable */
+        if (data) escape.hwnd = hwnd;
+
+        for (parent = hwnd; parent && parent != top; parent = GetAncestor( parent, GA_PARENT ))
+        {
+            data = NTDRV_get_win_data( parent );
+            if (data)
+            {
+                escape.hwnd = parent;
+                break;
+            }
+        }
+FIXME("Found hwnd %x backed by an SWM window\n", escape.hwnd);
+        if (escape.hwnd)
+        {
+            POINT pt = { 0, 0 };
+            MapWindowPoints( top, parent, &pt, 1 );
+            //OffsetRect( &escape.dc_rect, pt.x, pt.y );
+            //OffsetRect( &escape.drawable_rect, -pt.x, -pt.y );
+
+            FIXME("Offset by (%d, %d)\n", pt.x, pt.y);
+        }
+        else
+        {
+            if (NTDRV_get_win_data(top) || (top == GetDesktopWindow()))
+            {
+                /* SWM window already exists */
+                escape.hwnd = top;
+            }
+        }
+#else
+        escape.hwnd = GetAncestor(hwnd, GA_ROOT);
+#endif
+
+        if (flags & DCX_CLIPCHILDREN) escape.clip_children = TRUE;
+    }
+
+    TRACE("hdc %x, hwnd %x, top %x\n win_rect %s, top_rect %s\n", hdc, hwnd, top,
+        wine_dbgstr_rect(win_rect), wine_dbgstr_rect(top_rect));

ExtEscape( hdc, NTDRV_ESCAPE, sizeof(escape), (LPSTR)&escape, 0, NULL );
 }