1fefdd6f3b
We want to store the alpha channel in BitmapColor. To achieve this we can repurpose bIndex attribute for alpha. Generally we don't need bIndex at all as we can infer if we use index colors or not from the context (using palette or not) Change-Id: I18fe748beeca59e2869368a1c3c2ee9d2062b41e Reviewed-on: https://gerrit.libreoffice.org/61057 Tested-by: Jenkins Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
86 lines
3.4 KiB
C++
86 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_VCL_ALPHA_HXX
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#define INCLUDED_VCL_ALPHA_HXX
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#include <sal/config.h>
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#include <utility>
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#include <vcl/dllapi.h>
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#include <vcl/bitmap.hxx>
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class BitmapEx;
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class VCL_DLLPUBLIC AlphaMask : private Bitmap
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{
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public:
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AlphaMask();
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explicit AlphaMask( const Bitmap& rBitmap );
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AlphaMask( const AlphaMask& rAlphaMask );
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AlphaMask( AlphaMask&& rAlphaMask );
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explicit AlphaMask( const Size& rSizePixel, const sal_uInt8* pEraseTransparency = nullptr );
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virtual ~AlphaMask() override;
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AlphaMask& operator=( const Bitmap& rBitmap );
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AlphaMask& operator=( const AlphaMask& rAlphaMask ) { return static_cast<AlphaMask&>( Bitmap::operator=( rAlphaMask ) ); }
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AlphaMask& operator=( AlphaMask&& rAlphaMask ) { return static_cast<AlphaMask&>( Bitmap::operator=( std::move(rAlphaMask) ) ); }
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bool operator!() const { return Bitmap::operator!(); }
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bool operator==( const AlphaMask& rAlphaMask ) const { return Bitmap::operator==(rAlphaMask); }
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bool operator!=( const AlphaMask& rAlphaMask ) const { return Bitmap::operator!=(rAlphaMask); }
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void SetPrefMapMode( const MapMode& rMapMode ) { Bitmap::SetPrefMapMode( rMapMode ); }
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void SetPrefSize( const Size& rSize ) { Bitmap::SetPrefSize( rSize ); }
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Size GetSizePixel() const { return Bitmap::GetSizePixel(); }
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BitmapChecksum GetChecksum() const { return Bitmap::GetChecksum(); }
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Bitmap const & GetBitmap() const;
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void Erase( sal_uInt8 cTransparency );
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void Replace( const Bitmap& rMask, sal_uInt8 rReplaceTransparency );
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void Replace( sal_uInt8 cSearchTransparency, sal_uInt8 cReplaceTransparency );
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BitmapReadAccess* AcquireReadAccess() { return Bitmap::AcquireReadAccess(); }
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BitmapWriteAccess* AcquireWriteAccess() { return Bitmap::AcquireWriteAccess(); }
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void ReleaseAccess( BitmapReadAccess* pAccess );
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typedef vcl::ScopedBitmapAccess< BitmapReadAccess, AlphaMask, &AlphaMask::AcquireReadAccess >
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ScopedReadAccess;
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using Bitmap::IsEmpty;
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private:
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friend class BitmapEx;
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friend class ::OutputDevice;
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friend bool VCL_DLLPUBLIC ReadDIBBitmapEx(BitmapEx& rTarget, SvStream& rIStm, bool bFileHeader, bool bMSOFormat);
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SAL_DLLPRIVATE const Bitmap& ImplGetBitmap() const;
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SAL_DLLPRIVATE void ImplSetBitmap( const Bitmap& rBitmap );
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};
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#endif // INCLUDED_VCL_ALPHA_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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