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diff --git a/cppcanvas/qa/unit/test.cxx b/cppcanvas/qa/unit/test.cxx
new file mode 100644
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+++ b/cppcanvas/qa/unit/test.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <test/bootstrapfixture.hxx>
+
+#include <vcl/wrkwin.hxx>
+#include <vcl/canvastools.hxx>
+
+#include <com/sun/star/rendering/XBitmap.hpp>
+#include <com/sun/star/rendering/XCanvas.hpp>
+#include <com/sun/star/rendering/XBitmapCanvas.hpp>
+
+using namespace ::com::sun::star;
+
+class CanvasTest : public test::BootstrapFixture
+{
+public:
+    CanvasTest() : BootstrapFixture(true, false) {}
+
+    void testComposite();
+
+    CPPUNIT_TEST_SUITE(CanvasTest);
+    CPPUNIT_TEST(testComposite);
+    CPPUNIT_TEST_SUITE_END();
+};
+
+void CanvasTest::testComposite()
+{
+#ifdef LINUX
+    ScopedVclPtrInstance<WorkWindow> pWin( nullptr, WB_STDWORK );
+
+    uno::Reference<rendering::XCanvas> xCanvas = pWin->GetOutDev()->GetCanvas ();
+    if( !xCanvas.is() )
+        return; // can't get a canvas working at all - truly headless ?
+
+    // a huge canvas ...
+    Size aSize (1, 1);
+    uno::Reference<rendering::XBitmap> xBitmap = xCanvas->getDevice ()->createCompatibleAlphaBitmap(
+                        vcl::unotools::integerSize2DFromSize( aSize ) );
+    CPPUNIT_ASSERT( xBitmap.is() );
+
+    uno::Reference< rendering::XBitmapCanvas > xBitmapCanvas( xBitmap, uno::UNO_QUERY );
+    CPPUNIT_ASSERT( xBitmapCanvas.is() );
+
+    BitmapEx aBitmapEx;
+    {
+        // clear the canvas and basic sanity check ...
+        xBitmapCanvas->clear();
+        CPPUNIT_ASSERT( aBitmapEx.Create( xBitmapCanvas, aSize ) );
+        CPPUNIT_ASSERT( aBitmapEx.IsAlpha() );
+        CPPUNIT_ASSERT( !aBitmapEx.GetAlpha().IsEmpty() );
+    }
+
+    {
+        // render something
+        rendering::RenderState aDefaultState;
+        uno::Sequence< double > aRedTransparent{ 1.0, // R
+                                                 0.0, // G
+                                                 0.0, // B
+                                                 0.5 }; // A
+        aDefaultState.DeviceColor = aRedTransparent;
+#if 0
+        // words fail me to describe the sheer beauty of allocating a UNO
+        // object to represent a polygon, and manually handling the ViewState
+        // and there being no public helper for this - to render ... a rectangle.
+        XCachedPrimitive    fillPolyPolygon( [in] XPolyPolygon2D xPolyPolygon, [in] ViewState aViewState, [in] RenderState aRenderState )
+#endif
+    }
+
+#endif
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(CanvasTest);
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */