1 files changed, 51 insertions, 0 deletions
diff --git a/vcl/inc/win/wingdiimpl.hxx b/vcl/inc/win/wingdiimpl.hxx
new file mode 100644
index 000000000..d9616292b
--- /dev/null
+++ b/vcl/inc/win/wingdiimpl.hxx
@@ -0,0 +1,51 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_VCL_INC_WIN_WINGDIIMPL_HXX
+#define INCLUDED_VCL_INC_WIN_WINGDIIMPL_HXX
+
+#include <win/salgdi.h>
+#include <ControlCacheKey.hxx>
+
+class ControlCacheKey;
+
+// Base class for some functionality that OpenGL/Skia/GDI backends must each implement.
+class WinSalGraphicsImplBase
+{
+public:
+    virtual ~WinSalGraphicsImplBase() {}
+
+    // If true is returned, the following functions are used for drawing controls.
+    virtual bool UseRenderNativeControl() const { return false; }
+    virtual bool TryRenderCachedNativeControl(const ControlCacheKey& /*rControlCacheKey*/,
+                                              int /*nX*/, int /*nY*/)
+    {
+        abort();
+    }
+    virtual bool RenderAndCacheNativeControl(CompatibleDC& /*rWhite*/, CompatibleDC& /*rBlack*/,
+                                             int /*nX*/, int /*nY*/,
+                                             ControlCacheKey& /*aControlCacheKey*/)
+    {
+        abort();
+    }
+
+    virtual void ClearDevFontCache() {}
+
+    virtual void Flush() {}
+
+    // Implementation for WinSalGraphics::DrawTextLayout().
+    // Returns true if handled, if false, then WinSalGraphics will handle it itself.
+    virtual bool DrawTextLayout(const GenericSalLayout&) { return false; }
+
+    virtual void ClearNativeControlCache() {}
+};
+
+#endif // INCLUDED_VCL_INC_WIN_WINGDIIMPL_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */