1 files changed, 50 insertions, 0 deletions
diff --git a/vcl/unx/x11/xlimits.cxx b/vcl/unx/x11/xlimits.cxx
new file mode 100644
index 000000000000..1d64d8e9f0f0
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+++ b/vcl/unx/x11/xlimits.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Version: MPL 1.1 / GPLv3+ / LGPLv3+
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License or as specified alternatively below. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * Major Contributor(s):
+ * Copyright (C) 2012 Red Hat, Inc., Caolán McNamara <caolanm@redhat.com>
+ *  (initial developer)
+ *
+ * All Rights Reserved.
+ *
+ * For minor contributions see the git repository.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 3 or later (the "GPLv3+"), or
+ * the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
+ * in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
+ * instead of those above.
+ */
+
+#include <sal/log.hxx>
+#include <unx/x11/xlimits.hxx>
+
+Pixmap limitXCreatePixmap(Display *display, Drawable d, unsigned int width, unsigned int height, unsigned int depth)
+{
+    // The X protocol request CreatePixmap puts an upper bound
+    // of 16 bit to the size. Beyond that there may be implementation
+    // limits of the Xserver; which we should catch by a failed XCreatePixmap
+    // call. However extra large values should be caught here since we'd run into
+    // 16 bit truncation here without noticing.
+    //
+    // see, e.g. moz#424333
+    if (width > SAL_MAX_INT16 || height > SAL_MAX_INT16)
+    {
+        SAL_WARN("vcl", "overlarge pixmap: " << width << " x " << height);
+        return None;
+    }
+    return XCreatePixmap(display, d, width, height, depth);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */