1 files changed, 75 insertions, 0 deletions
diff --git a/include/vcl/alpha.hxx b/include/vcl/alpha.hxx
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+++ b/include/vcl/alpha.hxx
@@ -0,0 +1,75 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_ALPHA_HXX
+#define INCLUDED_VCL_ALPHA_HXX
+
+#include <sal/config.h>
+
+#include <utility>
+
+#include <vcl/dllapi.h>
+#include <vcl/bitmap.hxx>
+
+class BitmapEx;
+
+class VCL_DLLPUBLIC AlphaMask final : public Bitmap
+{
+public:
+
+                AlphaMask();
+    explicit    AlphaMask( const Bitmap& rBitmap );
+                AlphaMask( const AlphaMask& rAlphaMask );
+                AlphaMask( AlphaMask&& rAlphaMask );
+    explicit    AlphaMask( const Size& rSizePixel, const sal_uInt8* pEraseTransparency = nullptr );
+    virtual     ~AlphaMask() override;
+
+    AlphaMask&  operator=( const Bitmap& rBitmap );
+    AlphaMask&  operator=( const AlphaMask& rAlphaMask ) { return static_cast<AlphaMask&>( Bitmap::operator=( rAlphaMask ) ); }
+    AlphaMask&  operator=( AlphaMask&& rAlphaMask ) noexcept { return static_cast<AlphaMask&>( Bitmap::operator=( std::move(rAlphaMask) ) ); }
+    bool        operator==( const AlphaMask& rAlphaMask ) const { return Bitmap::operator==(rAlphaMask); }
+    bool        operator!=( const AlphaMask& rAlphaMask ) const { return Bitmap::operator!=(rAlphaMask); }
+
+    Bitmap const & GetBitmap() const;
+
+    void        Erase( sal_uInt8 cTransparency );
+    void        BlendWith(const Bitmap& rOther);
+
+    BitmapReadAccess*  AcquireAlphaReadAccess() { return Bitmap::AcquireReadAccess(); }
+    BitmapWriteAccess* AcquireAlphaWriteAccess() { return Bitmap::AcquireWriteAccess(); }
+
+    void        ReleaseAccess( BitmapReadAccess* pAccess );
+
+    typedef vcl::ScopedBitmapAccess<BitmapReadAccess, AlphaMask, &AlphaMask::AcquireAlphaReadAccess> ScopedReadAccess;
+
+    using Bitmap::IsEmpty;
+
+private:
+    friend class BitmapEx;
+    friend class ::OutputDevice;
+    friend bool VCL_DLLPUBLIC ReadDIBBitmapEx(BitmapEx& rTarget, SvStream& rIStm, bool bFileHeader, bool bMSOFormat);
+
+    SAL_DLLPRIVATE const Bitmap&    ImplGetBitmap() const;
+    SAL_DLLPRIVATE void             ImplSetBitmap( const Bitmap& rBitmap );
+
+};
+
+#endif // INCLUDED_VCL_ALPHA_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */