tdf#144139 don't crash when OutputDevice is a printer

Change-Id: Ia3843966949b8164b01cecd762ea2b5c5bf0339b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122777
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/vcl/unx/gtk3/gtkinst.cxx b/vcl/unx/gtk3/gtkinst.cxx
index 36ea3f9..7782205 100644
--- a/vcl/unx/gtk3/gtkinst.cxx
+++ b/vcl/unx/gtk3/gtkinst.cxx
@@ -4358,7 +4358,19 @@ public:

        VclPtr<VirtualDevice> xOutput(VclPtr<VirtualDevice>::Create(DeviceFormat::DEFAULT));
        xOutput->SetOutputSizePixel(aSize);
        xOutput->DrawOutDev(Point(), aSize, rPos, aSize, rOutput);

        switch (rOutput.GetOutDevType())
        {
            case OUTDEV_WINDOW:
            case OUTDEV_VIRDEV:
                xOutput->DrawOutDev(Point(), aSize, rPos, aSize, rOutput);
                break;
            case OUTDEV_PRINTER:
            case OUTDEV_PDF:
                xOutput->SetBackground(rOutput.GetBackground());
                xOutput->Erase();
                break;
        }

        cairo_surface_t* pSurface = get_underlying_cairo_surface(*xOutput);
        cairo_t* cr = cairo_create(pSurface);
@@ -4376,7 +4388,17 @@ public:
        gtk_widget_size_allocate(m_pWidget, &aOrigAllocation, 0);
#endif

        rOutput.DrawOutDev(rPos, aSize, Point(), aSize, *xOutput);
        switch (rOutput.GetOutDevType())
        {
            case OUTDEV_WINDOW:
            case OUTDEV_VIRDEV:
                rOutput.DrawOutDev(rPos, aSize, Point(), aSize, *xOutput);
                break;
            case OUTDEV_PRINTER:
            case OUTDEV_PDF:
                rOutput.DrawBitmapEx(rPos, xOutput->GetBitmapEx(Point(), aSize));
                break;
        }

        if (bAnimations)
            g_object_set(pSettings, "gtk-enable-animations", true, nullptr);