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Diffstat (limited to 'vcl/source/bitmap/bmpfast.cxx')
| -rw-r--r-- | vcl/source/bitmap/bmpfast.cxx | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/vcl/source/bitmap/bmpfast.cxx b/vcl/source/bitmap/bmpfast.cxx new file mode 100644 index 000000000..5ee7b22d9 --- /dev/null +++ b/vcl/source/bitmap/bmpfast.cxx @@ -0,0 +1,828 @@ +/* -*- 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 . + */ + +#include <vcl/salgtype.hxx> + +#include <bitmap/BitmapWriteAccess.hxx> +#include <bitmap/bmpfast.hxx> + +#include <sal/log.hxx> + +typedef unsigned char PIXBYTE; + +namespace { + +class BasePixelPtr +{ +public: + explicit BasePixelPtr( PIXBYTE* p = nullptr ) : mpPixel( p ) {} + void SetRawPtr( PIXBYTE* pRawPtr ) { mpPixel = pRawPtr; } + void AddByteOffset( int nByteOffset ) { mpPixel += nByteOffset; } + +protected: + PIXBYTE* mpPixel; +}; + +template <ScanlineFormat PIXFMT> +class TrueColorPixelPtr : public BasePixelPtr +{ +public: + PIXBYTE GetRed() const; + PIXBYTE GetGreen() const; + PIXBYTE GetBlue() const; + PIXBYTE GetAlpha() const; + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const; + void SetAlpha( PIXBYTE a ) const; +}; + +// template specializations for truecolor pixel formats +template <> +class TrueColorPixelPtr<ScanlineFormat::N24BitTcRgb> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 3; } + + PIXBYTE GetRed() const { return mpPixel[0]; } + PIXBYTE GetGreen() const { return mpPixel[1]; } + PIXBYTE GetBlue() const { return mpPixel[2]; } + static PIXBYTE GetAlpha() { return 255; } + static void SetAlpha( PIXBYTE ) {} + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const + { + mpPixel[0] = r; + mpPixel[1] = g; + mpPixel[2] = b; + } +}; + +template <> +class TrueColorPixelPtr<ScanlineFormat::N24BitTcBgr> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 3; } + + PIXBYTE GetRed() const { return mpPixel[2]; } + PIXBYTE GetGreen() const { return mpPixel[1]; } + PIXBYTE GetBlue() const { return mpPixel[0]; } + static PIXBYTE GetAlpha() { return 255; } + static void SetAlpha( PIXBYTE ) {} + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const + { + mpPixel[0] = b; + mpPixel[1] = g; + mpPixel[2] = r; + } +}; + +template <> +class TrueColorPixelPtr<ScanlineFormat::N32BitTcArgb> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 4; } + + PIXBYTE GetRed() const { return mpPixel[1]; } + PIXBYTE GetGreen() const { return mpPixel[2]; } + PIXBYTE GetBlue() const { return mpPixel[3]; } + PIXBYTE GetAlpha() const { return mpPixel[0]; } + void SetAlpha( PIXBYTE a ) const { mpPixel[0] = a; } + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const + { + mpPixel[1] = r; + mpPixel[2] = g; + mpPixel[3] = b; + } +}; + +template <> +class TrueColorPixelPtr<ScanlineFormat::N32BitTcAbgr> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 4; } + + PIXBYTE GetRed() const { return mpPixel[3]; } + PIXBYTE GetGreen() const { return mpPixel[2]; } + PIXBYTE GetBlue() const { return mpPixel[1]; } + PIXBYTE GetAlpha() const { return mpPixel[0]; } + void SetAlpha( PIXBYTE a ) const { mpPixel[0] = a; } + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const + { + mpPixel[1] = b; + mpPixel[2] = g; + mpPixel[3] = r; + } +}; + +template <> +class TrueColorPixelPtr<ScanlineFormat::N32BitTcRgba> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 4; } + + PIXBYTE GetRed() const { return mpPixel[0]; } + PIXBYTE GetGreen() const { return mpPixel[1]; } + PIXBYTE GetBlue() const { return mpPixel[2]; } + PIXBYTE GetAlpha() const { return mpPixel[3]; } + void SetAlpha( PIXBYTE a ) const{ mpPixel[3] = a; } + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const + { + mpPixel[0] = r; + mpPixel[1] = g; + mpPixel[2] = b; + } +}; + +template <> +class TrueColorPixelPtr<ScanlineFormat::N32BitTcBgra> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 4; } + + PIXBYTE GetRed() const { return mpPixel[2]; } + PIXBYTE GetGreen() const { return mpPixel[1]; } + PIXBYTE GetBlue() const { return mpPixel[0]; } + PIXBYTE GetAlpha() const { return mpPixel[3]; } + void SetAlpha( PIXBYTE a ) const{ mpPixel[3] = a; } + + void SetColor( PIXBYTE r, PIXBYTE g, PIXBYTE b ) const + { + mpPixel[0] = b; + mpPixel[1] = g; + mpPixel[2] = r; + } +}; + +// This assumes the content uses the grayscale palette (needs to be checked +// by code allowing the use of the format). +// Only reading color is implemented, since e.g. 24bpp input couldn't be +// easily guaranteed to be grayscale. +template <> +class TrueColorPixelPtr<ScanlineFormat::N8BitPal> : public BasePixelPtr +{ +public: + void operator++() { mpPixel += 1; } + + PIXBYTE GetRed() const { return mpPixel[0]; } + PIXBYTE GetGreen() const { return mpPixel[0]; } + PIXBYTE GetBlue() const { return mpPixel[0]; } + static PIXBYTE GetAlpha() { return 255; } +}; + +} + +// converting truecolor formats +template <ScanlineFormat SRCFMT, ScanlineFormat DSTFMT> +static void ImplConvertPixel( const TrueColorPixelPtr<DSTFMT>& rDst, + const TrueColorPixelPtr<SRCFMT>& rSrc ) +{ + rDst.SetColor( rSrc.GetRed(), rSrc.GetGreen(), rSrc.GetBlue() ); + rDst.SetAlpha( rSrc.GetAlpha() ); +} + +template <ScanlineFormat SRCFMT, ScanlineFormat DSTFMT> +static void ImplConvertLine( const TrueColorPixelPtr<DSTFMT>& rDst, + const TrueColorPixelPtr<SRCFMT>& rSrc, int nPixelCount ) +{ + TrueColorPixelPtr<DSTFMT> aDst( rDst ); + TrueColorPixelPtr<SRCFMT> aSrc( rSrc ); + while( --nPixelCount >= 0 ) + { + ImplConvertPixel( aDst, aSrc ); + ++aSrc; + ++aDst; + } +} + +// alpha blending truecolor pixels +template <ScanlineFormat SRCFMT, ScanlineFormat DSTFMT> +static void ImplBlendPixels( const TrueColorPixelPtr<DSTFMT>& rDst, + const TrueColorPixelPtr<SRCFMT>& rSrc, unsigned nAlphaVal ) +{ + static const unsigned nAlphaShift = 8; + if( !nAlphaVal ) + ImplConvertPixel( rDst, rSrc ); + else if( nAlphaVal != ~(~0U << nAlphaShift) ) + { + int nR = rDst.GetRed(); + int nS = rSrc.GetRed(); + nR = nS + (((nR - nS) * nAlphaVal) >> nAlphaShift); + + int nG = rDst.GetGreen(); + nS = rSrc.GetGreen(); + nG = nS + (((nG - nS) * nAlphaVal) >> nAlphaShift); + + int nB = rDst.GetBlue(); + nS = rSrc.GetBlue(); + nB = nS + (((nB - nS) * nAlphaVal) >> nAlphaShift); + + rDst.SetColor( sal::static_int_cast<PIXBYTE>(nR), + sal::static_int_cast<PIXBYTE>(nG), + sal::static_int_cast<PIXBYTE>(nB) ); + } +} + +template <ScanlineFormat MASKFMT, ScanlineFormat SRCFMT, ScanlineFormat DSTFMT> +static void ImplBlendLines( const TrueColorPixelPtr<DSTFMT>& rDst, + const TrueColorPixelPtr<SRCFMT>& rSrc, const TrueColorPixelPtr<MASKFMT>& rMsk, + int nPixelCount ) +{ + TrueColorPixelPtr<MASKFMT> aMsk( rMsk ); + TrueColorPixelPtr<DSTFMT> aDst( rDst ); + TrueColorPixelPtr<SRCFMT> aSrc( rSrc ); + while( --nPixelCount >= 0 ) + { + // VCL masks store alpha as color, hence the GetRed() and not GetAlpha(). + ImplBlendPixels(aDst, aSrc, aMsk.GetRed()); + ++aDst; + ++aSrc; + ++aMsk; + } +} + +static bool ImplCopyImage( BitmapBuffer& rDstBuffer, const BitmapBuffer& rSrcBuffer ) +{ + const int nSrcLinestep = rSrcBuffer.mnScanlineSize; + int nDstLinestep = rDstBuffer.mnScanlineSize; + + const PIXBYTE* pRawSrc = rSrcBuffer.mpBits; + PIXBYTE* pRawDst = rDstBuffer.mpBits; + + // source and destination don't match upside down + if( ScanlineFormat::TopDown & (rSrcBuffer.mnFormat ^ rDstBuffer.mnFormat) ) + { + pRawDst += (rSrcBuffer.mnHeight - 1) * nDstLinestep; + nDstLinestep = -rDstBuffer.mnScanlineSize; + } + else if( nSrcLinestep == nDstLinestep ) + { + memcpy( pRawDst, pRawSrc, rSrcBuffer.mnHeight * nDstLinestep ); + return true; + } + + int nByteWidth = nSrcLinestep; + if( nByteWidth > rDstBuffer.mnScanlineSize ) + nByteWidth = rDstBuffer.mnScanlineSize; + + for( int y = rSrcBuffer.mnHeight; --y >= 0; ) + { + memcpy( pRawDst, pRawSrc, nByteWidth ); + pRawSrc += nSrcLinestep; + pRawDst += nDstLinestep; + } + + return true; +} + +template <ScanlineFormat DSTFMT,ScanlineFormat SRCFMT> +static bool ImplConvertToBitmap( TrueColorPixelPtr<SRCFMT>& rSrcLine, + BitmapBuffer& rDstBuffer, const BitmapBuffer& rSrcBuffer ) +{ + // help the compiler to avoid instantiations of unneeded conversions + SAL_WARN_IF( SRCFMT == DSTFMT, "vcl.gdi", "ImplConvertToBitmap into same format"); + if( SRCFMT == DSTFMT ) + return false; + + const int nSrcLinestep = rSrcBuffer.mnScanlineSize; + int nDstLinestep = rDstBuffer.mnScanlineSize; + + TrueColorPixelPtr<DSTFMT> aDstLine; aDstLine.SetRawPtr( rDstBuffer.mpBits ); + + // source and destination don't match upside down + if( ScanlineFormat::TopDown & (rSrcBuffer.mnFormat ^ rDstBuffer.mnFormat) ) + { + aDstLine.AddByteOffset( (rSrcBuffer.mnHeight - 1) * nDstLinestep ); + nDstLinestep = -nDstLinestep; + } + + for( int y = rSrcBuffer.mnHeight; --y >= 0; ) + { + ImplConvertLine( aDstLine, rSrcLine, rSrcBuffer.mnWidth ); + rSrcLine.AddByteOffset( nSrcLinestep ); + aDstLine.AddByteOffset( nDstLinestep ); + } + + return true; +} + +template <ScanlineFormat SRCFMT> +static bool ImplConvertFromBitmap( BitmapBuffer& rDst, const BitmapBuffer& rSrc ) +{ + TrueColorPixelPtr<SRCFMT> aSrcType; aSrcType.SetRawPtr( rSrc.mpBits ); + + // select the matching instantiation for the destination's bitmap format + switch (RemoveScanline(rDst.mnFormat)) + { + case ScanlineFormat::N1BitMsbPal: + case ScanlineFormat::N1BitLsbPal: + case ScanlineFormat::N8BitPal: + break; + + case ScanlineFormat::N32BitTcMask: +// return ImplConvertToBitmap<ScanlineFormat::N32BitTcMask>( aSrcType, rDst, rSrc ); + break; + + case ScanlineFormat::N24BitTcBgr: + return ImplConvertToBitmap<ScanlineFormat::N24BitTcBgr>( aSrcType, rDst, rSrc ); + case ScanlineFormat::N24BitTcRgb: + return ImplConvertToBitmap<ScanlineFormat::N24BitTcRgb>( aSrcType, rDst, rSrc ); + + case ScanlineFormat::N32BitTcAbgr: + return ImplConvertToBitmap<ScanlineFormat::N32BitTcAbgr>( aSrcType, rDst, rSrc ); + case ScanlineFormat::N32BitTcArgb: + return ImplConvertToBitmap<ScanlineFormat::N32BitTcArgb>( aSrcType, rDst, rSrc ); + case ScanlineFormat::N32BitTcBgra: + return ImplConvertToBitmap<ScanlineFormat::N32BitTcBgra>( aSrcType, rDst, rSrc ); + case ScanlineFormat::N32BitTcRgba: + return ImplConvertToBitmap<ScanlineFormat::N32BitTcRgba>( aSrcType, rDst, rSrc ); + default: break; + } + + static int nNotAccelerated = 0; + SAL_WARN_IF( rSrc.mnWidth * rSrc.mnHeight >= 4000 && ++nNotAccelerated == 100, + "vcl.gdi", + "ImplConvertFromBitmap for not accelerated case (" << std::hex << static_cast<int>(rSrc.mnFormat) << "->" << static_cast<int>(rDst.mnFormat) << ")" ); + + return false; +} + +// A universal stretching conversion is overkill in most common situations +// => performance benefits for speeding up the non-stretching cases +bool ImplFastBitmapConversion( BitmapBuffer& rDst, const BitmapBuffer& rSrc, + const SalTwoRect& rTR ) +{ + // TODO:horizontal mirroring not implemented yet + if( rTR.mnDestWidth < 0 ) + return false; + // vertical mirroring + if( rTR.mnDestHeight < 0 ) + // TODO: rDst.mnFormat ^= ScanlineFormat::TopDown; + return false; + + // offsetted conversion is not implemented yet + if( rTR.mnSrcX || rTR.mnSrcY ) + return false; + if( rTR.mnDestX || rTR.mnDestY ) + return false; + + // stretched conversion is not implemented yet + if( rTR.mnDestWidth != rTR.mnSrcWidth ) + return false; + if( rTR.mnDestHeight!= rTR.mnSrcHeight ) + return false; + + // check source image size + if( rSrc.mnWidth < rTR.mnSrcX + rTR.mnSrcWidth ) + return false; + if( rSrc.mnHeight < rTR.mnSrcY + rTR.mnSrcHeight ) + return false; + + // check dest image size + if( rDst.mnWidth < rTR.mnDestX + rTR.mnDestWidth ) + return false; + if( rDst.mnHeight < rTR.mnDestY + rTR.mnDestHeight ) + return false; + + const ScanlineFormat nSrcFormat = RemoveScanline(rSrc.mnFormat); + const ScanlineFormat nDstFormat = RemoveScanline(rDst.mnFormat); + + // special handling of trivial cases + if( nSrcFormat == nDstFormat ) + { + // accelerated palette conversions not yet implemented + if( rSrc.maPalette != rDst.maPalette ) + return false; + return ImplCopyImage( rDst, rSrc ); + } + + // select the matching instantiation for the source's bitmap format + switch( nSrcFormat ) + { + case ScanlineFormat::N1BitMsbPal: + case ScanlineFormat::N1BitLsbPal: + break; + + case ScanlineFormat::N32BitTcMask: +// return ImplConvertFromBitmap<ScanlineFormat::N32BitTcMask>( rDst, rSrc ); + break; + + case ScanlineFormat::N8BitPal: + if(rSrc.maPalette.IsGreyPalette8Bit()) + return ImplConvertFromBitmap<ScanlineFormat::N8BitPal>( rDst, rSrc ); + break; + + case ScanlineFormat::N24BitTcBgr: + return ImplConvertFromBitmap<ScanlineFormat::N24BitTcBgr>( rDst, rSrc ); + case ScanlineFormat::N24BitTcRgb: + return ImplConvertFromBitmap<ScanlineFormat::N24BitTcRgb>( rDst, rSrc ); + + case ScanlineFormat::N32BitTcAbgr: + return ImplConvertFromBitmap<ScanlineFormat::N32BitTcAbgr>( rDst, rSrc ); + case ScanlineFormat::N32BitTcArgb: + return ImplConvertFromBitmap<ScanlineFormat::N32BitTcArgb>( rDst, rSrc ); + case ScanlineFormat::N32BitTcBgra: + return ImplConvertFromBitmap<ScanlineFormat::N32BitTcBgra>( rDst, rSrc ); + case ScanlineFormat::N32BitTcRgba: + return ImplConvertFromBitmap<ScanlineFormat::N32BitTcRgba>( rDst, rSrc ); + default: break; + } + + static int nNotAccelerated = 0; + SAL_WARN_IF( rSrc.mnWidth * rSrc.mnHeight >= 4000 && ++nNotAccelerated == 100, + "vcl.gdi", + "ImplFastBitmapConversion for not accelerated case (" << std::hex << static_cast<int>(rSrc.mnFormat) << "->" << static_cast<int>(rDst.mnFormat) << ")" ); + + return false; +} + +static inline ConstScanline ImplGetScanline( const BitmapBuffer& rBuf, tools::Long nY ) +{ + if( rBuf.mnFormat & ScanlineFormat::TopDown ) + return rBuf.mpBits + nY * rBuf.mnScanlineSize; + else + return rBuf.mpBits + (rBuf.mnHeight - 1 - nY) * rBuf.mnScanlineSize; +} + +static inline Scanline ImplGetScanline( BitmapBuffer& rBuf, tools::Long nY ) +{ + return const_cast<Scanline>(ImplGetScanline( const_cast<const BitmapBuffer&>(rBuf), nY )); +} + +template <ScanlineFormat DSTFMT, ScanlineFormat SRCFMT> +static bool ImplCopyToScanline( tools::Long nY, BitmapBuffer& rDst, TrueColorPixelPtr<SRCFMT>& rSrcLine, tools::Long nSrcWidth ) +{ + TrueColorPixelPtr<DSTFMT> aDstType; + aDstType.SetRawPtr( ImplGetScanline( rDst, nY )); + ImplConvertLine( aDstType, rSrcLine, std::min( nSrcWidth, rDst.mnWidth )); + return true; +} + +template <ScanlineFormat SRCFMT> +static bool ImplCopyFromScanline( tools::Long nY, BitmapBuffer& rDst, ConstScanline aSrcScanline, tools::Long nSrcWidth ) +{ + TrueColorPixelPtr<SRCFMT> aSrcType; + aSrcType.SetRawPtr( const_cast<Scanline>( aSrcScanline )); + // select the matching instantiation for the destination's bitmap format + switch( RemoveScanline( rDst.mnFormat )) + { + case ScanlineFormat::N24BitTcBgr: + return ImplCopyToScanline<ScanlineFormat::N24BitTcBgr>( nY, rDst, aSrcType, nSrcWidth ); + case ScanlineFormat::N24BitTcRgb: + return ImplCopyToScanline<ScanlineFormat::N24BitTcRgb>( nY, rDst, aSrcType, nSrcWidth ); + + case ScanlineFormat::N32BitTcAbgr: + return ImplCopyToScanline<ScanlineFormat::N32BitTcAbgr>( nY, rDst, aSrcType, nSrcWidth ); + case ScanlineFormat::N32BitTcArgb: + return ImplCopyToScanline<ScanlineFormat::N32BitTcArgb>( nY, rDst, aSrcType, nSrcWidth ); + case ScanlineFormat::N32BitTcBgra: + return ImplCopyToScanline<ScanlineFormat::N32BitTcBgra>( nY, rDst, aSrcType, nSrcWidth ); + case ScanlineFormat::N32BitTcRgba: + return ImplCopyToScanline<ScanlineFormat::N32BitTcRgba>( nY, rDst, aSrcType, nSrcWidth ); + default: + break; + } + return false; + +} + +bool ImplFastCopyScanline( tools::Long nY, BitmapBuffer& rDst, ConstScanline aSrcScanline, + ScanlineFormat nSrcScanlineFormat, sal_uInt32 nSrcScanlineSize) +{ + if( rDst.mnHeight <= nY ) + return false; + + const ScanlineFormat nSrcFormat = RemoveScanline(nSrcScanlineFormat); + const ScanlineFormat nDstFormat = RemoveScanline(rDst.mnFormat); + + // special handling of trivial cases + if( nSrcFormat == nDstFormat ) + { + memcpy( ImplGetScanline( rDst, nY ), aSrcScanline, std::min<tools::Long>(nSrcScanlineSize, rDst.mnScanlineSize)); + return true; + } + + // select the matching instantiation for the source's bitmap format + switch( nSrcFormat ) + { + case ScanlineFormat::N24BitTcBgr: + return ImplCopyFromScanline<ScanlineFormat::N24BitTcBgr>( nY, rDst, aSrcScanline, nSrcScanlineSize / 3 ); + case ScanlineFormat::N24BitTcRgb: + return ImplCopyFromScanline<ScanlineFormat::N24BitTcRgb>( nY, rDst, aSrcScanline, nSrcScanlineSize / 3 ); + + case ScanlineFormat::N32BitTcAbgr: + return ImplCopyFromScanline<ScanlineFormat::N32BitTcAbgr>( nY, rDst, aSrcScanline, nSrcScanlineSize / 4 ); + case ScanlineFormat::N32BitTcArgb: + return ImplCopyFromScanline<ScanlineFormat::N32BitTcArgb>( nY, rDst, aSrcScanline, nSrcScanlineSize / 4 ); + case ScanlineFormat::N32BitTcBgra: + return ImplCopyFromScanline<ScanlineFormat::N32BitTcBgra>( nY, rDst, aSrcScanline, nSrcScanlineSize / 4 ); + case ScanlineFormat::N32BitTcRgba: + return ImplCopyFromScanline<ScanlineFormat::N32BitTcRgba>( nY, rDst, aSrcScanline, nSrcScanlineSize / 4 ); + default: + break; + } + return false; +} + +bool ImplFastCopyScanline( tools::Long nY, BitmapBuffer& rDst, const BitmapBuffer& rSrc) +{ + if( nY >= rDst.mnHeight ) + return false; + if( rSrc.maPalette != rDst.maPalette ) + return false; + return ImplFastCopyScanline( nY, rDst, ImplGetScanline( rSrc, nY ), rSrc.mnFormat, rSrc.mnScanlineSize); +} + +template <ScanlineFormat DSTFMT, ScanlineFormat SRCFMT> //,sal_uLong MSKFMT> +static bool ImplBlendToBitmap( TrueColorPixelPtr<SRCFMT>& rSrcLine, + BitmapBuffer& rDstBuffer, const BitmapBuffer& rSrcBuffer, + const BitmapBuffer& rMskBuffer ) +{ + SAL_WARN_IF(( rMskBuffer.mnFormat & ~ScanlineFormat::TopDown ) != ScanlineFormat::N8BitPal, + "vcl.gdi", "FastBmp BlendImage: unusual MSKFMT" ); + + const int nSrcLinestep = rSrcBuffer.mnScanlineSize; + int nMskLinestep = rMskBuffer.mnScanlineSize; + int nDstLinestep = rDstBuffer.mnScanlineSize; + + TrueColorPixelPtr<ScanlineFormat::N8BitPal> aMskLine; aMskLine.SetRawPtr( rMskBuffer.mpBits ); + TrueColorPixelPtr<DSTFMT> aDstLine; aDstLine.SetRawPtr( rDstBuffer.mpBits ); + + // special case for single line masks + if( rMskBuffer.mnHeight == 1 ) + nMskLinestep = 0; + + // source and mask don't match: upside down + if( (rSrcBuffer.mnFormat ^ rMskBuffer.mnFormat) & ScanlineFormat::TopDown ) + { + aMskLine.AddByteOffset( (rSrcBuffer.mnHeight - 1) * nMskLinestep ); + nMskLinestep = -nMskLinestep; + } + + // source and destination don't match: upside down + if( (rSrcBuffer.mnFormat ^ rDstBuffer.mnFormat) & ScanlineFormat::TopDown ) + { + aDstLine.AddByteOffset( (rDstBuffer.mnHeight - 1) * nDstLinestep ); + nDstLinestep = -nDstLinestep; + } + + assert(rDstBuffer.mnHeight <= rSrcBuffer.mnHeight && "not sure about that?"); + for (int y = rDstBuffer.mnHeight; --y >= 0;) + { + ImplBlendLines(aDstLine, rSrcLine, aMskLine, rDstBuffer.mnWidth); + aDstLine.AddByteOffset( nDstLinestep ); + rSrcLine.AddByteOffset( nSrcLinestep ); + aMskLine.AddByteOffset( nMskLinestep ); + } + + return true; +} + +// some specializations to reduce the code size +template <> +bool ImplBlendToBitmap<ScanlineFormat::N24BitTcBgr,ScanlineFormat::N24BitTcBgr>( + TrueColorPixelPtr<ScanlineFormat::N24BitTcBgr>&, + BitmapBuffer& rDstBuffer, const BitmapBuffer& rSrcBuffer, + const BitmapBuffer& rMskBuffer ) + { + TrueColorPixelPtr<ScanlineFormat::N24BitTcRgb> aSrcType; aSrcType.SetRawPtr( rSrcBuffer.mpBits ); + return ImplBlendToBitmap<ScanlineFormat::N24BitTcRgb>( aSrcType, rDstBuffer, rSrcBuffer, rMskBuffer ); + } + +template <> +bool ImplBlendToBitmap<ScanlineFormat::N32BitTcAbgr,ScanlineFormat::N32BitTcAbgr>( + TrueColorPixelPtr<ScanlineFormat::N32BitTcAbgr>&, + BitmapBuffer& rDstBuffer, const BitmapBuffer& rSrcBuffer, + const BitmapBuffer& rMskBuffer ) + { + TrueColorPixelPtr<ScanlineFormat::N32BitTcArgb> aSrcType; aSrcType.SetRawPtr( rSrcBuffer.mpBits ); + return ImplBlendToBitmap<ScanlineFormat::N32BitTcArgb>( aSrcType, rDstBuffer, rSrcBuffer, rMskBuffer ); + } + +template <> +bool ImplBlendToBitmap<ScanlineFormat::N32BitTcBgra,ScanlineFormat::N32BitTcBgra>( + TrueColorPixelPtr<ScanlineFormat::N32BitTcBgra>&, + BitmapBuffer& rDstBuffer, const BitmapBuffer& rSrcBuffer, + const BitmapBuffer& rMskBuffer ) + { + TrueColorPixelPtr<ScanlineFormat::N32BitTcRgba> aSrcType; aSrcType.SetRawPtr( rSrcBuffer.mpBits ); + return ImplBlendToBitmap<ScanlineFormat::N32BitTcRgba>( aSrcType, rDstBuffer, rSrcBuffer, rMskBuffer ); + } + +template <ScanlineFormat SRCFMT> +static bool ImplBlendFromBitmap( BitmapBuffer& rDst, const BitmapBuffer& rSrc, const BitmapBuffer& rMsk ) +{ + TrueColorPixelPtr<SRCFMT> aSrcType; aSrcType.SetRawPtr( rSrc.mpBits ); + + // select the matching instantiation for the destination's bitmap format + switch (RemoveScanline(rDst.mnFormat)) + { + case ScanlineFormat::N1BitMsbPal: + case ScanlineFormat::N1BitLsbPal: + case ScanlineFormat::N8BitPal: + break; + + case ScanlineFormat::N32BitTcMask: +// return ImplBlendToBitmap<ScanlineFormat::N32BitTcMask>( aSrcType, rDst, rSrc, rMsk ); + break; + + case ScanlineFormat::N24BitTcBgr: + return ImplBlendToBitmap<ScanlineFormat::N24BitTcBgr>( aSrcType, rDst, rSrc, rMsk ); + case ScanlineFormat::N24BitTcRgb: + return ImplBlendToBitmap<ScanlineFormat::N24BitTcRgb>( aSrcType, rDst, rSrc, rMsk ); + + case ScanlineFormat::N32BitTcAbgr: + return ImplBlendToBitmap<ScanlineFormat::N32BitTcAbgr>( aSrcType, rDst, rSrc, rMsk ); + case ScanlineFormat::N32BitTcArgb: + return ImplBlendToBitmap<ScanlineFormat::N32BitTcArgb>( aSrcType, rDst, rSrc, rMsk ); + case ScanlineFormat::N32BitTcBgra: + return ImplBlendToBitmap<ScanlineFormat::N32BitTcBgra>( aSrcType, rDst, rSrc, rMsk ); + case ScanlineFormat::N32BitTcRgba: + return ImplBlendToBitmap<ScanlineFormat::N32BitTcRgba>( aSrcType, rDst, rSrc, rMsk ); + default: break; + } + + static int nNotAccelerated = 0; + SAL_WARN_IF( rSrc.mnWidth * rSrc.mnHeight >= 4000 && ++nNotAccelerated == 100, + "vcl.gdi", + "ImplBlendFromBitmap for not accelerated case (" << std::hex << static_cast<int>(rSrc.mnFormat) << "*" << static_cast<int>(rMsk.mnFormat) << "->" << static_cast<int>(rDst.mnFormat) ); + return false; +} + +bool ImplFastBitmapBlending( BitmapWriteAccess const & rDstWA, + const BitmapReadAccess& rSrcRA, const BitmapReadAccess& rMskRA, + const SalTwoRect& rTR ) +{ + // accelerated blending of paletted bitmaps not implemented yet + if( rSrcRA.HasPalette() ) + return false; + if( rDstWA.HasPalette() ) + return false; + // TODO: either get rid of mask's use of 8BIT_PAL or check the palette + + // horizontal mirroring not implemented yet + if( rTR.mnDestWidth < 0 ) + return false; + // vertical mirroring + if( rTR.mnDestHeight < 0 ) + // TODO: rDst.mnFormat ^= ScanlineFormat::TopDown; + return false; + + // offsetted blending is not implemented yet + if( rTR.mnSrcX || rTR.mnSrcY ) + return false; + if( rTR.mnDestX || rTR.mnDestY ) + return false; + + // stretched blending is not implemented yet + if( rTR.mnDestWidth != rTR.mnSrcWidth ) + return false; + if( rTR.mnDestHeight!= rTR.mnSrcHeight ) + return false; + + // check source image size + if( rSrcRA.Width() < rTR.mnSrcX + rTR.mnSrcWidth ) + return false; + if( rSrcRA.Height() < rTR.mnSrcY + rTR.mnSrcHeight ) + return false; + + // check mask image size + if( rMskRA.Width() < rTR.mnSrcX + rTR.mnSrcWidth ) + return false; + if( rMskRA.Height() < rTR.mnSrcY + rTR.mnSrcHeight ) + if( rMskRA.Height() != 1 ) + return false; + + // check dest image size + if( rDstWA.Width() < rTR.mnDestX + rTR.mnDestWidth ) + return false; + if( rDstWA.Height() < rTR.mnDestY + rTR.mnDestHeight ) + return false; + + BitmapBuffer& rDst = *rDstWA.ImplGetBitmapBuffer(); + const BitmapBuffer& rSrc = *rSrcRA.ImplGetBitmapBuffer(); + const BitmapBuffer& rMsk = *rMskRA.ImplGetBitmapBuffer(); + + const ScanlineFormat nSrcFormat = RemoveScanline(rSrc.mnFormat); + + // select the matching instantiation for the source's bitmap format + switch( nSrcFormat ) + { + case ScanlineFormat::N1BitMsbPal: + case ScanlineFormat::N1BitLsbPal: + break; + + case ScanlineFormat::N32BitTcMask: +// return ImplBlendFromBitmap<ScanlineFormat::N32BitTcMask>( rDst, rSrc ); + break; + + case ScanlineFormat::N8BitPal: + if(rSrc.maPalette.IsGreyPalette8Bit()) + return ImplBlendFromBitmap<ScanlineFormat::N8BitPal>( rDst, rSrc, rMsk ); + break; + + case ScanlineFormat::N24BitTcBgr: + return ImplBlendFromBitmap<ScanlineFormat::N24BitTcBgr>( rDst, rSrc, rMsk ); + case ScanlineFormat::N24BitTcRgb: + return ImplBlendFromBitmap<ScanlineFormat::N24BitTcRgb>( rDst, rSrc, rMsk ); + + case ScanlineFormat::N32BitTcAbgr: + return ImplBlendFromBitmap<ScanlineFormat::N32BitTcAbgr>( rDst, rSrc, rMsk ); + case ScanlineFormat::N32BitTcArgb: + return ImplBlendFromBitmap<ScanlineFormat::N32BitTcArgb>( rDst, rSrc, rMsk ); + case ScanlineFormat::N32BitTcBgra: + return ImplBlendFromBitmap<ScanlineFormat::N32BitTcBgra>( rDst, rSrc, rMsk ); + case ScanlineFormat::N32BitTcRgba: + return ImplBlendFromBitmap<ScanlineFormat::N32BitTcRgba>( rDst, rSrc, rMsk ); + default: break; + } + + static int nNotAccelerated = 0; + SAL_WARN_IF( rSrc.mnWidth * rSrc.mnHeight >= 4000 && ++nNotAccelerated == 100, + "vcl.gdi", + "ImplFastBlend for not accelerated case (" << std::hex << static_cast<int>(rSrc.mnFormat) << "*" << static_cast<int>(rMsk.mnFormat) << "->" << static_cast<int>(rDst.mnFormat) << ")" ); + + return false; +} + +bool ImplFastEraseBitmap( BitmapBuffer& rDst, const BitmapColor& rColor ) +{ + const ScanlineFormat nDstFormat = RemoveScanline(rDst.mnFormat); + + // erasing a bitmap is often just a byte-wise memory fill + bool bByteFill = true; + sal_uInt8 nFillByte; + + switch( nDstFormat ) + { + case ScanlineFormat::N1BitMsbPal: + case ScanlineFormat::N1BitLsbPal: + nFillByte = rColor.GetIndex(); + nFillByte = static_cast<sal_uInt8>( -(nFillByte & 1) ); // 0x00 or 0xFF + break; + case ScanlineFormat::N8BitPal: + nFillByte = rColor.GetIndex(); + break; + + case ScanlineFormat::N24BitTcBgr: + case ScanlineFormat::N24BitTcRgb: + nFillByte = rColor.GetRed(); + if( (nFillByte != rColor.GetGreen()) + || (nFillByte != rColor.GetBlue()) ) + bByteFill = false; + break; + + default: + bByteFill = false; + nFillByte = 0x00; + break; + } + + if( bByteFill ) + { + tools::Long nByteCount = rDst.mnHeight * rDst.mnScanlineSize; + memset( rDst.mpBits, nFillByte, nByteCount ); + return true; + } + + // TODO: handle other bitmap formats + switch( nDstFormat ) + { + case ScanlineFormat::N32BitTcMask: + + case ScanlineFormat::N24BitTcBgr: + case ScanlineFormat::N24BitTcRgb: + + case ScanlineFormat::N32BitTcAbgr: + case ScanlineFormat::N32BitTcArgb: + case ScanlineFormat::N32BitTcBgra: + case ScanlineFormat::N32BitTcRgba: + break; + + default: + break; + } + + return false; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |