Bug 542280 - use GetUpdateRgn() on Windows mobile, r=blassey

widget/src/windows/nsWindow.cpp

@@ -404,11 +404,6 @@ nsWindow::nsWindow() : nsBaseWidget()
   mBrush                = ::CreateSolidBrush(NSRGB_2_COLOREF(mBackground));
   mForeground           = ::GetSysColor(COLOR_WINDOWTEXT);
 
-#ifdef WINCE_WINDOWS_MOBILE
-  mInvalidatedRegion = do_CreateInstance(kRegionCID);
-  mInvalidatedRegion->Init();
-#endif
-
 #if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_WIN7
   mTaskbarPreview = nsnull;
   mHasTaskbarIconBeenCreated = PR_FALSE;
@@ -2097,12 +2092,7 @@ NS_METHOD nsWindow::Invalidate(PRBool aIsSynchronous)
                          nsCAutoString("noname"),
                          (PRInt32) mWnd);
 #endif // WIDGET_DEBUG_OUTPUT
-#ifdef WINCE_WINDOWS_MOBILE
-    // We need to keep track of our own invalidated region for Windows CE
-    RECT r;
-    GetClientRect(mWnd, &r);
-    AddRECTToRegion(r, mInvalidatedRegion);
-#endif
+
     VERIFY(::InvalidateRect(mWnd, NULL, FALSE));
 
     if (aIsSynchronous) {
@@ -2133,10 +2123,6 @@ NS_METHOD nsWindow::Invalidate(const nsIntRect & aRect, PRBool aIsSynchronous)
     rect.right  = aRect.x + aRect.width;
     rect.bottom = aRect.y + aRect.height;
 
-#ifdef WINCE_WINDOWS_MOBILE
-    // We need to keep track of our own invalidated region for Windows CE
-    AddRECTToRegion(rect, mInvalidatedRegion);
-#endif
     VERIFY(::InvalidateRect(mWnd, &rect, FALSE));
 
     if (aIsSynchronous) {
@@ -6199,11 +6185,6 @@ HBRUSH nsWindow::OnControlColor()
 // Can be overriden. Controls auto-erase of background.
 PRBool nsWindow::AutoErase(HDC dc)
 {
-#ifdef WINCE_WINDOWS_MOBILE
-  RECT wrect;
-  GetClipBox(dc, &wrect);
-  AddRECTToRegion(wrect, mInvalidatedRegion);
-#endif
   return PR_FALSE;
 }
 

widget/src/windows/nsWindow.h

@@ -429,9 +429,6 @@ protected:
   nsPopupType           mPopupType;
   PRPackedBool          mDisplayPanFeedback;
   WindowHook            mWindowHook;
-#ifdef WINCE_WINDOWS_MOBILE
-  nsCOMPtr<nsIRegion>   mInvalidatedRegion; 
-#endif
   static PRUint32       sInstanceCount;
   static TriStateBool   sCanQuit;
   static nsWindow*      sCurrentWindow;

widget/src/windows/nsWindowGfx.cpp

@@ -283,13 +283,16 @@ nsCOMPtr<nsIRegion> nsWindow::GetRegionToPaint(PRBool aForceFullRepaint,
   }
 #else
 # ifdef WINCE_WINDOWS_MOBILE
-  if (!mInvalidatedRegion->IsEmpty()) {  
-    // XXX: we may not recieve invalidates when an OS dialog obsures out window 
-    // and dismisses, so mInvalidatedRegion may not be complete
-    paintRgnWin = mInvalidatedRegion.forget();
-    mInvalidatedRegion = do_CreateInstance(kRegionCID);
-    mInvalidatedRegion->Init(); 
-    return paintRgnWin;
+  paintRgn = ::CreateRectRgn(0, 0, 0, 0);
+  if (paintRgn != NULL) {
+    int result = GetUpdateRgn(mWnd, paintRgn, FALSE);
+    if (result == 1) {
+      POINT pt = {0,0};
+      ::MapWindowPoints(NULL, mWnd, &pt, 1);
+      ::OffsetRgn(paintRgn, pt.x, pt.y);
+    }
+    paintRgnWin = nsWindowGfx::ConvertHRGNToRegion(paintRgn);
+    ::DeleteObject(paintRgn);
   }
 # endif
   paintRgn = ::CreateRectRgn(ps.rcPaint.left, ps.rcPaint.top,
@@ -1044,23 +1047,17 @@ PRBool nsWindow::OnPaintImageDDraw16()
     r.bottom = rects->mRects[i].height + rects->mRects[i].y;
     RECT renderRect = r;
     SetLastError(0); // See http://msdn.microsoft.com/en-us/library/dd145046%28VS.85%29.aspx
-    if (MapWindowPoints(mWnd, 0, (LPPOINT)&renderRect, 2) || 0 == (hr = GetLastError()))
-      hr = glpDDPrimary->Blt(&renderRect, glpDDSecondary, &r, 0, NULL);
-#ifdef WINCE_WINDOWS_MOBILE
-    if (FAILED(hr))
-      // add this rect back to the invalidated region so we'll attempt paint it next time around
-      mInvalidatedRegion->Union(rects->mRects[i].x, rects->mRects[i].y,
-                                rects->mRects[i].width, rects->mRects[i].height);
-#endif
+    MapWindowPoints(mWnd, 0, (LPPOINT)&renderRect, 2);
+    hr = glpDDPrimary->Blt(&renderRect, glpDDSecondary, &r, 0, NULL);
+    if (FAILED(hr)) {
+      NS_ERROR("this blt should never fail!");
+      printf("#### %s blt failed: %08lx", __FUNCTION__, hr);
+    }
   }
   result = PR_TRUE;
 
 cleanup:
-#ifdef WINCE_WINDOWS_MOBILE
-  // re-invalidate the region if we failed.
-  if (!result)
-    mInvalidatedRegion->Union(*paintRgnWin.get());
-#endif
+  NS_ASSERTION(result == PR_TRUE, "fatal drawing error");
   ::EndPaint(mWnd, &ps);
   mPaintDC = nsnull;
   mPainting = PR_FALSE;