2fcfbd7376
AlphaMask doesn't need any conversion to gray, it's just enough to make sure the alpha channel bitmap is 8bpp. And the conversion is needed for the separate-OutputDevice-alpha hacks, where GetBitmap() gives non-8bpp bitmap for the alpha contents, but there all the R,G,B channels are the same, so just take red and avoid pointless conversion. Change-Id: Ib30fc8fa6d05067d582402ab2c0fcfb49a3742f2 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91772 Tested-by: Jenkins Reviewed-by: Luboš Luňák <l.lunak@collabora.com>
125 lines
4.1 KiB
C++
125 lines
4.1 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_INC_SALBMP_HXX
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#define INCLUDED_VCL_INC_SALBMP_HXX
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#include <tools/gen.hxx>
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#include <tools/solar.h>
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#include <vcl/checksum.hxx>
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#include <vcl/BitmapAccessMode.hxx>
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#include <vcl/BitmapBuffer.hxx>
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#include <com/sun/star/rendering/XBitmapCanvas.hpp>
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struct BitmapBuffer;
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class Color;
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class SalGraphics;
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class BitmapPalette;
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struct BitmapSystemData;
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enum class BmpScaleFlag;
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extern const sal_uLong nVCLRLut[ 6 ];
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extern const sal_uLong nVCLGLut[ 6 ];
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extern const sal_uLong nVCLBLut[ 6 ];
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extern const sal_uLong nVCLDitherLut[ 256 ];
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extern const sal_uLong nVCLLut[ 256 ];
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class VCL_PLUGIN_PUBLIC SalBitmap
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{
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public:
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SalBitmap()
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: mnChecksum(0)
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, mbChecksumValid(false)
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{
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}
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virtual ~SalBitmap();
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virtual bool Create( const Size& rSize,
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sal_uInt16 nBitCount,
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const BitmapPalette& rPal ) = 0;
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virtual bool Create( const SalBitmap& rSalBmp ) = 0;
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virtual bool Create( const SalBitmap& rSalBmp,
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SalGraphics* pGraphics ) = 0;
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virtual bool Create( const SalBitmap& rSalBmp,
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sal_uInt16 nNewBitCount ) = 0;
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virtual bool Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& rBitmapCanvas,
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Size& rSize,
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bool bMask = false ) = 0;
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virtual void Destroy() = 0;
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virtual Size GetSize() const = 0;
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virtual sal_uInt16 GetBitCount() const = 0;
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virtual BitmapBuffer* AcquireBuffer( BitmapAccessMode nMode ) = 0;
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virtual void ReleaseBuffer( BitmapBuffer* pBuffer, BitmapAccessMode nMode ) = 0;
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virtual bool GetSystemData( BitmapSystemData& rData ) = 0;
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virtual bool ScalingSupported() const = 0;
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virtual bool Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag ) = 0;
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void DropScaledCache();
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virtual bool Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uInt8 nTol ) = 0;
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virtual bool ConvertToGreyscale()
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{
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return false;
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}
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virtual bool InterpretAs8Bit()
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{
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return false;
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}
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void GetChecksum(BitmapChecksum& rChecksum) const
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{
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updateChecksum();
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if (!mbChecksumValid)
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rChecksum = 0; // back-compat
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else
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rChecksum = mnChecksum;
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}
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void InvalidateChecksum()
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{
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mbChecksumValid = false;
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}
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protected:
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BitmapChecksum mnChecksum;
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bool mbChecksumValid;
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protected:
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virtual void updateChecksum() const;
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// helper function to convert data in 1,2,4 bpp formats to a 8/24/32bpp format
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enum class BitConvert
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{
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A8,
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RGB,
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BGR,
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RGBA,
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BGRA
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};
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static std::unique_ptr< sal_uInt8[] > convertDataBitCount( const sal_uInt8* src,
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int width, int height, int bitCount, int bytesPerRow, const BitmapPalette& palette,
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BitConvert type );
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};
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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