Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 193 insertions, 0 deletions

diff --git a/include/vcl/ColorMask.hxx b/include/vcl/ColorMask.hxx
new file mode 100644
index 000000000..7610aa87e
--- /dev/null
+++ b/include/vcl/ColorMask.hxx
@@ -0,0 +1,193 @@
+/* -*- 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: */