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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /include/vcl/ColorMask.hxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/vcl/ColorMask.hxx')
-rw-r--r--include/vcl/ColorMask.hxx193
1 files changed, 193 insertions, 0 deletions
diff --git a/include/vcl/ColorMask.hxx b/include/vcl/ColorMask.hxx
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+/* -*- 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_COLORMASK_HXX
+#define INCLUDED_VCL_COLORMASK_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/BitmapColor.hxx>
+
+#define MASK_TO_COLOR( d_nVal, d_RM, d_GM, d_BM, d_RS, d_GS, d_BS, d_Col ) \
+const sal_uInt8 _def_cR = static_cast<sal_uInt8>( d_RS < 0 ? ( (d_nVal) & d_RM ) << -d_RS : ( (d_nVal) & d_RM ) >> d_RS ); \
+const sal_uInt8 _def_cG = static_cast<sal_uInt8>( d_GS < 0 ? ( (d_nVal) & d_GM ) << -d_GS : ( (d_nVal) & d_GM ) >> d_GS ); \
+const sal_uInt8 _def_cB = static_cast<sal_uInt8>( d_BS < 0 ? ( (d_nVal) & d_BM ) << -d_BS : ( (d_nVal) & d_BM ) >> d_BS ); \
+d_Col = BitmapColor( static_cast<sal_uInt8>( _def_cR | ( ( _def_cR & maR.mnOr ) >> maR.mnOrShift ) ), \
+ static_cast<sal_uInt8>( _def_cG | ( ( _def_cG & maG.mnOr ) >> maG.mnOrShift ) ), \
+ static_cast<sal_uInt8>( _def_cB | ( ( _def_cB & maB.mnOr ) >> maB.mnOrShift ) ) );
+
+
+#define COLOR_TO_MASK( d_rCol, d_RM, d_GM, d_BM, d_RS, d_GS, d_BS, d_ALPHA ) \
+( ( ( ( d_RS < 0 ) ? ( static_cast<sal_uInt32>((d_rCol).GetRed()) >> -d_RS ) : \
+ ( static_cast<sal_uInt32>((d_rCol).GetRed()) << d_RS ) ) & d_RM ) | \
+ ( ( ( d_GS < 0 ) ? ( static_cast<sal_uInt32>((d_rCol).GetGreen()) >> -d_GS ) : \
+ ( static_cast<sal_uInt32>((d_rCol).GetGreen()) << d_GS ) ) & d_GM ) | \
+ ( ( ( d_BS < 0 ) ? ( static_cast<sal_uInt32>((d_rCol).GetBlue()) >> -d_BS ) : \
+ ( static_cast<sal_uInt32>((d_rCol).GetBlue()) << d_BS ) ) & d_BM ) | \
+ d_ALPHA )
+
+
+struct VCL_DLLPUBLIC ColorMaskElement
+{
+ sal_uInt32 mnMask;
+ int mnShift;
+ int mnOrShift;
+ sal_uInt8 mnOr;
+ explicit ColorMaskElement(sal_uInt32 nMask = 0)
+ : mnMask(nMask)
+ , mnShift(0)
+ , mnOrShift(0)
+ , mnOr(0)
+ {
+ }
+ bool CalcMaskShift()
+ {
+ if (mnMask == 0)
+ return true;
+
+ // from which bit starts the mask?
+ int nShift = 31;
+
+ while( nShift >= 0 && !( mnMask & ( 1 << nShift ) ) )
+ --nShift;
+
+ mnShift = nShift - 7;
+ int nLen = 0;
+
+ // XXX determine number of bits set => walk right until null
+ while( nShift >= 0 && ( mnMask & ( 1 << nShift ) ) )
+ {
+ nShift--;
+ nLen++;
+ }
+
+ if (nLen > 8) // mask length must be 8 bits or less
+ return false;
+
+ mnOrShift = 8 - nLen;
+ mnOr = static_cast<sal_uInt8>( ( 0xFF >> nLen ) << mnOrShift );
+
+ return true;
+ }
+};
+
+class VCL_DLLPUBLIC ColorMask
+{
+ ColorMaskElement maR;
+ ColorMaskElement maG;
+ ColorMaskElement maB;
+
+public:
+
+ ColorMask(const ColorMaskElement& rRedMask = ColorMaskElement(),
+ const ColorMaskElement& rGreenMask = ColorMaskElement(),
+ const ColorMaskElement& rBlueMask = ColorMaskElement())
+ : maR(rRedMask)
+ , maG(rGreenMask)
+ , maB(rBlueMask)
+ {
+ }
+
+ inline sal_uInt32 GetRedMask() const;
+ inline sal_uInt32 GetGreenMask() const;
+ inline sal_uInt32 GetBlueMask() const;
+
+ inline void GetColorFor16BitMSB( BitmapColor& rColor, const sal_uInt8* pPixel ) const;
+ inline void SetColorFor16BitMSB( const BitmapColor& rColor, sal_uInt8* pPixel ) const;
+ inline void GetColorFor16BitLSB( BitmapColor& rColor, const sal_uInt8* pPixel ) const;
+ inline void SetColorFor16BitLSB( const BitmapColor& rColor, sal_uInt8* pPixel ) const;
+
+ inline void GetColorFor32Bit( BitmapColor& rColor, const sal_uInt8* pPixel ) const;
+ inline void GetColorAndAlphaFor32Bit( BitmapColor& rColor, sal_uInt8& rAlpha, const sal_uInt8* pPixel ) const;
+ inline void SetColorFor32Bit( const BitmapColor& rColor, sal_uInt8* pPixel ) const;
+};
+
+inline sal_uInt32 ColorMask::GetRedMask() const
+{
+ return maR.mnMask;
+}
+
+inline sal_uInt32 ColorMask::GetGreenMask() const
+{
+ return maG.mnMask;
+}
+
+inline sal_uInt32 ColorMask::GetBlueMask() const
+{
+ return maB.mnMask;
+}
+
+inline void ColorMask::GetColorFor16BitMSB( BitmapColor& rColor, const sal_uInt8* pPixel ) const
+{
+ const sal_uInt32 nVal = pPixel[ 1 ] | ( static_cast<sal_uInt32>(pPixel[ 0 ]) << 8 );
+
+ MASK_TO_COLOR( nVal, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, rColor );
+}
+
+inline void ColorMask::SetColorFor16BitMSB( const BitmapColor& rColor, sal_uInt8* pPixel ) const
+{
+ const sal_uInt16 nVal = static_cast<sal_uInt16>(COLOR_TO_MASK( rColor, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, 0/*nAlphaChannel*/ ));
+
+ pPixel[ 0 ] = static_cast<sal_uInt8>(nVal >> 8);
+ pPixel[ 1 ] = static_cast<sal_uInt8>(nVal);
+}
+
+inline void ColorMask::GetColorFor16BitLSB( BitmapColor& rColor, const sal_uInt8* pPixel ) const
+{
+ const sal_uInt32 nVal = pPixel[ 0 ] | ( static_cast<sal_uInt32>(pPixel[ 1 ]) << 8 );
+
+ MASK_TO_COLOR( nVal, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, rColor );
+}
+
+inline void ColorMask::SetColorFor16BitLSB( const BitmapColor& rColor, sal_uInt8* pPixel ) const
+{
+ const sal_uInt16 nVal = static_cast<sal_uInt16>(COLOR_TO_MASK( rColor, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, 0/*nAlphaChannel*/ ));
+
+ pPixel[ 0 ] = static_cast<sal_uInt8>(nVal);
+ pPixel[ 1 ] = static_cast<sal_uInt8>(nVal >> 8);
+}
+
+inline void ColorMask::GetColorFor32Bit( BitmapColor& rColor, const sal_uInt8* pPixel ) const
+{
+ const sal_uInt32 nVal = static_cast<sal_uInt32>(pPixel[ 0 ]) | ( static_cast<sal_uInt32>(pPixel[ 1 ]) << 8 ) |
+ ( static_cast<sal_uInt32>(pPixel[ 2 ]) << 16 ) | ( static_cast<sal_uInt32>(pPixel[ 3 ]) << 24 );
+
+ MASK_TO_COLOR( nVal, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, rColor );
+}
+
+inline void ColorMask::GetColorAndAlphaFor32Bit( BitmapColor& rColor, sal_uInt8& rAlpha, const sal_uInt8* pPixel ) const
+{
+ const sal_uInt32 nVal = static_cast<sal_uInt32>(pPixel[ 0 ]) | ( static_cast<sal_uInt32>(pPixel[ 1 ]) << 8 ) |
+ ( static_cast<sal_uInt32>(pPixel[ 2 ]) << 16 ) | ( static_cast<sal_uInt32>(pPixel[ 3 ]) << 24 );
+ rAlpha = static_cast<sal_uInt8>(nVal >> 24);
+
+ MASK_TO_COLOR( nVal, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, rColor );
+}
+
+inline void ColorMask::SetColorFor32Bit( const BitmapColor& rColor, sal_uInt8* pPixel ) const
+{
+ const sal_uInt32 nVal = COLOR_TO_MASK( rColor, maR.mnMask, maG.mnMask, maB.mnMask, maR.mnShift, maG.mnShift, maB.mnShift, 0/*nAlphaChannel*/ );
+ pPixel[ 0 ] = static_cast<sal_uInt8>(nVal);
+ pPixel[ 1 ] = static_cast<sal_uInt8>( nVal >> 8 );
+ pPixel[ 2 ] = static_cast<sal_uInt8>( nVal >> 16 );
+ pPixel[ 3 ] = static_cast<sal_uInt8>( nVal >> 24 );
+}
+
+#endif // INCLUDED_VCL_COLORMASK_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */