office-gobmx/vcl/inc/salbmp.hxx
Luboš Luňák 2fcfbd7376 no gray conversion needed for VCL alpha hacks
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>
2020-04-07 11:53:54 +02:00

125 lines
4.1 KiB
C++

/* -*- 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_INC_SALBMP_HXX
#define INCLUDED_VCL_INC_SALBMP_HXX
#include <tools/gen.hxx>
#include <tools/solar.h>
#include <vcl/checksum.hxx>
#include <vcl/BitmapAccessMode.hxx>
#include <vcl/BitmapBuffer.hxx>
#include <com/sun/star/rendering/XBitmapCanvas.hpp>
struct BitmapBuffer;
class Color;
class SalGraphics;
class BitmapPalette;
struct BitmapSystemData;
enum class BmpScaleFlag;
extern const sal_uLong nVCLRLut[ 6 ];
extern const sal_uLong nVCLGLut[ 6 ];
extern const sal_uLong nVCLBLut[ 6 ];
extern const sal_uLong nVCLDitherLut[ 256 ];
extern const sal_uLong nVCLLut[ 256 ];
class VCL_PLUGIN_PUBLIC SalBitmap
{
public:
SalBitmap()
: mnChecksum(0)
, mbChecksumValid(false)
{
}
virtual ~SalBitmap();
virtual bool Create( const Size& rSize,
sal_uInt16 nBitCount,
const BitmapPalette& rPal ) = 0;
virtual bool Create( const SalBitmap& rSalBmp ) = 0;
virtual bool Create( const SalBitmap& rSalBmp,
SalGraphics* pGraphics ) = 0;
virtual bool Create( const SalBitmap& rSalBmp,
sal_uInt16 nNewBitCount ) = 0;
virtual bool Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& rBitmapCanvas,
Size& rSize,
bool bMask = false ) = 0;
virtual void Destroy() = 0;
virtual Size GetSize() const = 0;
virtual sal_uInt16 GetBitCount() const = 0;
virtual BitmapBuffer* AcquireBuffer( BitmapAccessMode nMode ) = 0;
virtual void ReleaseBuffer( BitmapBuffer* pBuffer, BitmapAccessMode nMode ) = 0;
virtual bool GetSystemData( BitmapSystemData& rData ) = 0;
virtual bool ScalingSupported() const = 0;
virtual bool Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag ) = 0;
void DropScaledCache();
virtual bool Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uInt8 nTol ) = 0;
virtual bool ConvertToGreyscale()
{
return false;
}
virtual bool InterpretAs8Bit()
{
return false;
}
void GetChecksum(BitmapChecksum& rChecksum) const
{
updateChecksum();
if (!mbChecksumValid)
rChecksum = 0; // back-compat
else
rChecksum = mnChecksum;
}
void InvalidateChecksum()
{
mbChecksumValid = false;
}
protected:
BitmapChecksum mnChecksum;
bool mbChecksumValid;
protected:
virtual void updateChecksum() const;
// helper function to convert data in 1,2,4 bpp formats to a 8/24/32bpp format
enum class BitConvert
{
A8,
RGB,
BGR,
RGBA,
BGRA
};
static std::unique_ptr< sal_uInt8[] > convertDataBitCount( const sal_uInt8* src,
int width, int height, int bitCount, int bytesPerRow, const BitmapPalette& palette,
BitConvert type );
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */