uxtheme: Implement GetBufferedPaintTargetRect().

dlls/uxtheme/buffer.c

@@ -223,10 +223,20 @@ HDC WINAPI GetBufferedPaintTargetDC(HPAINTBUFFER bufferhandle)
 /***********************************************************************
  *      GetBufferedPaintTargetRect                         (UXTHEME.@)
  */
-HRESULT WINAPI GetBufferedPaintTargetRect(HPAINTBUFFER hBufferedPaint, RECT *prc)
+HRESULT WINAPI GetBufferedPaintTargetRect(HPAINTBUFFER bufferhandle, RECT *rect)
 {
-    FIXME("Stub (%p %p)\n", hBufferedPaint, prc);
-    return E_NOTIMPL;
+    struct paintbuffer *buffer = get_buffer_obj(bufferhandle);
+
+    TRACE("(%p %p)\n", buffer, rect);
+
+    if (!rect)
+        return E_POINTER;
+
+    if (!buffer)
+        return E_FAIL;
+
+    *rect = buffer->rect;
+    return S_OK;
 }
 
 /***********************************************************************

dlls/uxtheme/tests/system.c

@@ -619,16 +619,20 @@ todo_wine
     hdc = pGetBufferedPaintTargetDC(buffer);
     ok(hdc == target, "Unexpected target hdc %p, original %p\n", hdc, target);
 
+    hr = pGetBufferedPaintTargetRect(NULL, NULL);
+    ok(hr == E_POINTER, "Unexpected return code %#x\n", hr);
+
     hr = pGetBufferedPaintTargetRect(buffer, NULL);
-todo_wine
     ok(hr == E_POINTER, "Unexpected return code %#x\n", hr);
 
+    hr = pGetBufferedPaintTargetRect(NULL, &rect2);
+    ok(hr == E_FAIL, "Unexpected return code %#x\n", hr);
+
     SetRectEmpty(&rect2);
     hr = pGetBufferedPaintTargetRect(buffer, &rect2);
-todo_wine {
     ok(hr == S_OK, "Unexpected return code %#x\n", hr);
     ok(EqualRect(&rect, &rect2), "Wrong target rect\n");
-}
+
     hr = pEndBufferedPaint(buffer, FALSE);
     ok(hr == S_OK, "Unexpected return code %#x\n", hr);