2 files changed, 116 insertions, 0 deletions
diff --git a/vcl/qa/cppunit/gen/data/tdf121120.png b/vcl/qa/cppunit/gen/data/tdf121120.png
new file mode 100644
index 000000000..8e48fba38
--- /dev/null
+++ b/vcl/qa/cppunit/gen/data/tdf121120.png
diff --git a/vcl/qa/cppunit/gen/gen.cxx b/vcl/qa/cppunit/gen/gen.cxx
new file mode 100644
index 000000000..e313ff5d8
--- /dev/null
+++ b/vcl/qa/cppunit/gen/gen.cxx
@@ -0,0 +1,116 @@
+/* -*- 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 <com/sun/star/frame/Desktop.hpp>
+
+#include <comphelper/processfactory.hxx>
+#include <sfx2/app.hxx>
+#include <sfx2/objsh.hxx>
+#include <sfx2/sfxbasemodel.hxx>
+#include <test/unoapi_test.hxx>
+#include <vcl/BitmapReadAccess.hxx>
+#include <vcl/gdimtf.hxx>
+#include <vcl/virdev.hxx>
+
+using namespace com::sun::star;
+
+/// This test uses the gen backend (i.e. intentionally not the svp one, which is the default.)
+class GenTest : public UnoApiTest
+{
+public:
+    GenTest()
+        : UnoApiTest("/vcl/qa/cppunit/gen/data/")
+    {
+    }
+
+    virtual void setUp() override
+    {
+        UnoApiTest::setUp();
+        mxDesktop.set(
+            frame::Desktop::create(comphelper::getComponentContext(getMultiServiceFactory())));
+        SfxApplication::GetOrCreate();
+    };
+
+    virtual void tearDown() override
+    {
+        if (mxComponent.is())
+        {
+            closeDocument(mxComponent);
+            mxComponent->dispose();
+        }
+        UnoApiTest::tearDown();
+    };
+
+    Bitmap load(const char* pName)
+    {
+        OUString aFileURL;
+        createFileURL(OUString::createFromAscii(pName), aFileURL);
+        mxComponent = loadFromDesktop(aFileURL, "com.sun.star.drawing.DrawingDocument");
+        SfxBaseModel* pModel = dynamic_cast<SfxBaseModel*>(mxComponent.get());
+        CPPUNIT_ASSERT(pModel);
+        SfxObjectShell* pShell = pModel->GetObjectShell();
+        std::shared_ptr<GDIMetaFile> xMetaFile = pShell->GetPreviewMetaFile();
+        BitmapEx aResultBitmap;
+        CPPUNIT_ASSERT(xMetaFile->CreateThumbnail(aResultBitmap));
+        return aResultBitmap.GetBitmap();
+    }
+
+    uno::Reference<lang::XComponent> mxComponent;
+};
+
+CPPUNIT_TEST_FIXTURE(GenTest, testTdf121120)
+{
+    Bitmap aBitmap = load("tdf121120.png");
+    Bitmap::ScopedReadAccess pAccess(aBitmap);
+    const Size& rSize = aBitmap.GetSizePixel();
+    Color aColor(pAccess->GetPixel(rSize.getHeight() / 2, rSize.getWidth() / 2));
+    // Without the accompanying fix in place, this test would have failed with 'Expected: 255;
+    // Actual  : 1'. I.e. center of the preview (which has the background color) was ~black, not
+    // white.
+    CPPUNIT_ASSERT_EQUAL(0xff, int(aColor.GetRed()));
+    CPPUNIT_ASSERT_EQUAL(0xff, int(aColor.GetBlue()));
+    CPPUNIT_ASSERT_EQUAL(0xff, int(aColor.GetGreen()));
+}
+
+/// Test that drawing a line preview to a bitmap is not lost.
+CPPUNIT_TEST_FIXTURE(GenTest, testTdf107966)
+{
+    // Set up the virtual device: white background.
+    ScopedVclPtr<VirtualDevice> pVirtualDevice(VclPtr<VirtualDevice>::Create());
+    pVirtualDevice->SetLineColor();
+    MapMode aMapMode;
+    aMapMode.SetMapUnit(MapUnit::MapTwip);
+    pVirtualDevice->SetMapMode(aMapMode);
+    pVirtualDevice->SetOutputSizePixel(Size(90, 15));
+    pVirtualDevice->SetFillColor(Color(255, 255, 255));
+    pVirtualDevice->DrawRect(tools::Rectangle(Point(), Size(1350, 225)));
+    pVirtualDevice->SetFillColor(Color(0, 0, 0));
+    AntialiasingFlags nOldAA = pVirtualDevice->GetAntialiasing();
+    pVirtualDevice->SetAntialiasing(nOldAA & ~AntialiasingFlags::Enable);
+
+    // Paint a black polygon on it.
+    basegfx::B2DPolygon aPolygon;
+    aPolygon.append(basegfx::B2DPoint(0, 15));
+    aPolygon.append(basegfx::B2DPoint(1350, 15));
+    aPolygon.append(basegfx::B2DPoint(1350, 0));
+    aPolygon.append(basegfx::B2DPoint(0, 0));
+    pVirtualDevice->DrawPolygon(aPolygon);
+
+    // Make sure that the polygon is visible.
+    Bitmap aBitmap = pVirtualDevice->GetBitmap(Point(), Size(1350, 15));
+    Bitmap::ScopedReadAccess pAccess(aBitmap);
+    Color aPixel(pAccess->GetPixel(0, 0));
+    // Without the accompanying fix in place, this test would have failed with 'Expected: 000000;
+    // Actual: ffffff', i.e. the top left pixel was white, not black.
+    CPPUNIT_ASSERT_EQUAL(OUString("000000"), aPixel.AsRGBHexString());
+}
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */