diff options
Diffstat (limited to '')
| -rw-r--r-- | vcl/source/gdi/salmisc.cxx | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/vcl/source/gdi/salmisc.cxx b/vcl/source/gdi/salmisc.cxx new file mode 100644 index 000000000..83ebbd000 --- /dev/null +++ b/vcl/source/gdi/salmisc.cxx @@ -0,0 +1,435 @@ +/* -*- 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/BitmapReadAccess.hxx> +#include <vcl/salgtype.hxx> +#include <bitmap/bmpfast.hxx> +#include <o3tl/safeint.hxx> +#include <osl/diagnose.h> +#include <sal/log.hxx> +#include <tools/helpers.hxx> +#include <memory> + +#define IMPL_CASE_SET_FORMAT( Format, BitCount ) \ +case( ScanlineFormat::Format ): \ +{ \ + pFncSetPixel = BitmapReadAccess::SetPixelFor##Format; \ + pDstBuffer->mnBitCount = BitCount; \ +} \ +break + +#define DOUBLE_SCANLINES() \ +while( ( nActY < nHeight1 ) && ( pMapY[ nActY + 1 ] == nMapY ) ) \ +{ \ + memcpy( pDstScanMap[ nActY + 1 ], pDstScan, rDstBuffer.mnScanlineSize ); \ + nActY++; \ +} + +constexpr int TC_TO_PAL_COLORS = 4096; + +static tools::Long ImplIndexFromColor( const BitmapColor& rCol ) +{ + return ( ( static_cast<tools::Long>(rCol.GetBlue()) >> 4) << 8 ) | + ( ( static_cast<tools::Long>(rCol.GetGreen()) >> 4 ) << 4 ) | + ( static_cast<tools::Long>(rCol.GetRed()) >> 4 ); +} + +static void ImplPALToPAL( const BitmapBuffer& rSrcBuffer, BitmapBuffer& rDstBuffer, + FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel, + Scanline* pSrcScanMap, Scanline* pDstScanMap, sal_Int32 const * pMapX, const sal_Int32* pMapY ) +{ + const tools::Long nHeight1 = rDstBuffer.mnHeight - 1; + const ColorMask& rSrcMask = rSrcBuffer.maColorMask; + const ColorMask& rDstMask = rDstBuffer.maColorMask; + BitmapPalette aColMap( rSrcBuffer.maPalette.GetEntryCount() ); + BitmapColor* pColMapBuf = aColMap.ImplGetColorBuffer(); + BitmapColor aIndex( 0 ); + + for( sal_uInt16 i = 0, nSrcCount = aColMap.GetEntryCount(), nDstCount = rDstBuffer.maPalette.GetEntryCount(); i < nSrcCount; i++ ) + { + if( ( i < nDstCount ) && ( rSrcBuffer.maPalette[ i ] == rDstBuffer.maPalette[ i ] ) ) + aIndex.SetIndex( sal::static_int_cast<sal_uInt8>(i) ); + else + aIndex.SetIndex( sal::static_int_cast<sal_uInt8>(rDstBuffer.maPalette.GetBestIndex( rSrcBuffer.maPalette[ i ] )) ); + + pColMapBuf[ i ] = aIndex; + } + + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth; ++nX) + pFncSetPixel( pDstScan, nX, pColMapBuf[ pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ).GetIndex() ], rDstMask ); + + DOUBLE_SCANLINES(); + } +} + +static void ImplPALToTC( const BitmapBuffer& rSrcBuffer, BitmapBuffer const & rDstBuffer, + FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel, + Scanline* pSrcScanMap, Scanline* pDstScanMap, sal_Int32 const * pMapX, const sal_Int32* pMapY ) +{ + const tools::Long nHeight1 = rDstBuffer.mnHeight - 1; + const ColorMask& rSrcMask = rSrcBuffer.maColorMask; + const ColorMask& rDstMask = rDstBuffer.maColorMask; + const BitmapColor* pColBuf = rSrcBuffer.maPalette.ImplGetColorBuffer(); + + if( RemoveScanline( rSrcBuffer.mnFormat ) == ScanlineFormat::N1BitMsbPal ) + { + const BitmapColor aCol0( pColBuf[ 0 ] ); + const BitmapColor aCol1( pColBuf[ 1 ] ); + tools::Long nMapX; + + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth;) + { + nMapX = pMapX[ nX ]; + pFncSetPixel( pDstScan, nX++, + pSrcScan[ nMapX >> 3 ] & ( 1 << ( 7 - ( nMapX & 7 ) ) ) ? aCol1 : aCol0, + rDstMask ); + } + + DOUBLE_SCANLINES(); + } + } + else if( RemoveScanline( rSrcBuffer.mnFormat ) == ScanlineFormat::N8BitPal ) + { + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth; ++nX) + pFncSetPixel( pDstScan, nX, pColBuf[ pSrcScan[ pMapX[ nX ] ] ], rDstMask ); + + DOUBLE_SCANLINES(); + } + } + else + { + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth; ++nX) + pFncSetPixel( pDstScan, nX, pColBuf[ pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ).GetIndex() ], rDstMask ); + + DOUBLE_SCANLINES(); + } + } +} + +static void ImplTCToTC( const BitmapBuffer& rSrcBuffer, BitmapBuffer const & rDstBuffer, + FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel, + Scanline* pSrcScanMap, Scanline* pDstScanMap, sal_Int32 const * pMapX, const sal_Int32* pMapY ) +{ + const tools::Long nHeight1 = rDstBuffer.mnHeight - 1; + const ColorMask& rSrcMask = rSrcBuffer.maColorMask; + const ColorMask& rDstMask = rDstBuffer.maColorMask; + + if( RemoveScanline( rSrcBuffer.mnFormat ) == ScanlineFormat::N24BitTcBgr ) + { + BitmapColor aCol; + sal_uInt8* pPixel = nullptr; + + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth; ++nX) + { + pPixel = pSrcScan + pMapX[ nX ] * 3; + aCol.SetBlue( *pPixel++ ); + aCol.SetGreen( *pPixel++ ); + aCol.SetRed( *pPixel ); + pFncSetPixel( pDstScan, nX, aCol, rDstMask ); + } + + DOUBLE_SCANLINES() + } + } + else + { + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth; ++nX) + pFncSetPixel( pDstScan, nX, pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ), rDstMask ); + + DOUBLE_SCANLINES(); + } + } +} + +static void ImplTCToPAL( const BitmapBuffer& rSrcBuffer, BitmapBuffer const & rDstBuffer, + FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel, + Scanline* pSrcScanMap, Scanline* pDstScanMap, sal_Int32 const * pMapX, const sal_Int32* pMapY ) +{ + const tools::Long nHeight1 = rDstBuffer.mnHeight- 1; + const ColorMask& rSrcMask = rSrcBuffer.maColorMask; + const ColorMask& rDstMask = rDstBuffer.maColorMask; + std::unique_ptr<sal_uInt8[]> pColToPalMap(new sal_uInt8[ TC_TO_PAL_COLORS ]); + BitmapColor aIndex( 0 ); + + for( tools::Long nR = 0; nR < 16; nR++ ) + { + for( tools::Long nG = 0; nG < 16; nG++ ) + { + for( tools::Long nB = 0; nB < 16; nB++ ) + { + BitmapColor aCol( sal::static_int_cast<sal_uInt8>(nR << 4), + sal::static_int_cast<sal_uInt8>(nG << 4), + sal::static_int_cast<sal_uInt8>(nB << 4) ); + pColToPalMap[ ImplIndexFromColor( aCol ) ] = static_cast<sal_uInt8>(rDstBuffer.maPalette.GetBestIndex( aCol )); + } + } + } + + for (tools::Long nActY = 0; nActY < rDstBuffer.mnHeight; ++nActY) + { + tools::Long nMapY = pMapY[nActY]; + Scanline pSrcScan(pSrcScanMap[nMapY]), pDstScan(pDstScanMap[nActY]); + + for (tools::Long nX = 0; nX < rDstBuffer.mnWidth; ++nX) + { + aIndex.SetIndex( pColToPalMap[ ImplIndexFromColor( pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ) ) ] ); + pFncSetPixel( pDstScan, nX, aIndex, rDstMask ); + } + + DOUBLE_SCANLINES(); + } +} + +std::unique_ptr<BitmapBuffer> StretchAndConvert( + const BitmapBuffer& rSrcBuffer, const SalTwoRect& rTwoRect, + ScanlineFormat nDstBitmapFormat, std::optional<BitmapPalette> pDstPal, const ColorMask* pDstMask ) +{ + FncGetPixel pFncGetPixel; + FncSetPixel pFncSetPixel; + std::unique_ptr<BitmapBuffer> pDstBuffer(new BitmapBuffer); + + // set function for getting pixels + pFncGetPixel = BitmapReadAccess::GetPixelFunction( rSrcBuffer.mnFormat ); + if( !pFncGetPixel ) + { + // should never come here + // initialize pFncGetPixel to something valid that is + // least likely to crash + pFncGetPixel = BitmapReadAccess::GetPixelForN1BitMsbPal; + OSL_FAIL( "unknown read format" ); + } + + // set function for setting pixels + const ScanlineFormat nDstScanlineFormat = RemoveScanline( nDstBitmapFormat ); + switch( nDstScanlineFormat ) + { + IMPL_CASE_SET_FORMAT( N1BitMsbPal, 1 ); + IMPL_CASE_SET_FORMAT( N1BitLsbPal, 1 ); + IMPL_CASE_SET_FORMAT( N8BitPal, 8 ); + IMPL_CASE_SET_FORMAT( N24BitTcBgr, 24 ); + IMPL_CASE_SET_FORMAT( N24BitTcRgb, 24 ); + IMPL_CASE_SET_FORMAT( N32BitTcAbgr, 32 ); + IMPL_CASE_SET_FORMAT( N32BitTcArgb, 32 ); + IMPL_CASE_SET_FORMAT( N32BitTcBgra, 32 ); + IMPL_CASE_SET_FORMAT( N32BitTcRgba, 32 ); + IMPL_CASE_SET_FORMAT( N32BitTcMask, 32 ); + + default: + // should never come here + // initialize pFncSetPixel to something valid that is + // least likely to crash + pFncSetPixel = BitmapReadAccess::SetPixelForN1BitMsbPal; + pDstBuffer->mnBitCount = 1; + OSL_FAIL( "unknown write format" ); + break; + } + + // fill destination buffer + pDstBuffer->mnFormat = nDstBitmapFormat; + pDstBuffer->mnWidth = rTwoRect.mnDestWidth; + pDstBuffer->mnHeight = rTwoRect.mnDestHeight; + tools::Long nScanlineBase; + bool bFail = o3tl::checked_multiply<tools::Long>(pDstBuffer->mnBitCount, pDstBuffer->mnWidth, nScanlineBase); + if (bFail) + { + SAL_WARN("vcl.gdi", "checked multiply failed"); + pDstBuffer->mpBits = nullptr; + return nullptr; + } + pDstBuffer->mnScanlineSize = AlignedWidth4Bytes(nScanlineBase); + if (pDstBuffer->mnScanlineSize < nScanlineBase/8) + { + SAL_WARN("vcl.gdi", "scanline calculation wraparound"); + pDstBuffer->mpBits = nullptr; + return nullptr; + } + try + { + pDstBuffer->mpBits = new sal_uInt8[ pDstBuffer->mnScanlineSize * pDstBuffer->mnHeight ]; + } + catch( const std::bad_alloc& ) + { + // memory exception, clean up + pDstBuffer->mpBits = nullptr; + return nullptr; + } + + // do we need a destination palette or color mask? + if( ( nDstScanlineFormat == ScanlineFormat::N1BitMsbPal ) || + ( nDstScanlineFormat == ScanlineFormat::N1BitLsbPal ) || + ( nDstScanlineFormat == ScanlineFormat::N8BitPal ) ) + { + assert(pDstPal && "destination buffer requires palette"); + if (!pDstPal) + { + return nullptr; + } + pDstBuffer->maPalette = *pDstPal; + } + else if(nDstScanlineFormat == ScanlineFormat::N32BitTcMask ) + { + assert(pDstMask && "destination buffer requires color mask"); + if (!pDstMask) + { + return nullptr; + } + pDstBuffer->maColorMask = *pDstMask; + } + + // short circuit the most important conversions + bool bFastConvert = ImplFastBitmapConversion( *pDstBuffer, rSrcBuffer, rTwoRect ); + if( bFastConvert ) + return pDstBuffer; + + std::unique_ptr<Scanline[]> pSrcScan; + std::unique_ptr<Scanline[]> pDstScan; + std::unique_ptr<sal_Int32[]> pMapX; + std::unique_ptr<sal_Int32[]> pMapY; + + try + { + pSrcScan.reset(new Scanline[rSrcBuffer.mnHeight]); + pDstScan.reset(new Scanline[pDstBuffer->mnHeight]); + pMapX.reset(new sal_Int32[pDstBuffer->mnWidth]); + pMapY.reset(new sal_Int32[pDstBuffer->mnHeight]); + } + catch( const std::bad_alloc& ) + { + // memory exception, clean up + // remark: the buffer ptr causing the exception + // is still NULL here + return nullptr; + } + + // horizontal mapping table + if( (pDstBuffer->mnWidth != rTwoRect.mnSrcWidth) && (pDstBuffer->mnWidth != 0) ) + { + const double fFactorX = static_cast<double>(rTwoRect.mnSrcWidth) / pDstBuffer->mnWidth; + + for (tools::Long i = 0; i < pDstBuffer->mnWidth; ++i) + pMapX[ i ] = rTwoRect.mnSrcX + static_cast<int>( i * fFactorX ); + } + else + { + for (tools::Long i = 0, nTmp = rTwoRect.mnSrcX ; i < pDstBuffer->mnWidth; ++i) + pMapX[ i ] = nTmp++; + } + + // vertical mapping table + if( (pDstBuffer->mnHeight != rTwoRect.mnSrcHeight) && (pDstBuffer->mnHeight != 0) ) + { + const double fFactorY = static_cast<double>(rTwoRect.mnSrcHeight) / pDstBuffer->mnHeight; + + for (tools::Long i = 0; i < pDstBuffer->mnHeight; ++i) + pMapY[ i ] = rTwoRect.mnSrcY + static_cast<int>( i * fFactorY ); + } + else + { + for (tools::Long i = 0, nTmp = rTwoRect.mnSrcY; i < pDstBuffer->mnHeight; ++i) + pMapY[ i ] = nTmp++; + } + + // source scanline buffer + Scanline pTmpScan; + tools::Long nOffset; + if( rSrcBuffer.mnFormat & ScanlineFormat::TopDown ) + { + pTmpScan = rSrcBuffer.mpBits; + nOffset = rSrcBuffer.mnScanlineSize; + } + else + { + pTmpScan = rSrcBuffer.mpBits + ( rSrcBuffer.mnHeight - 1 ) * rSrcBuffer.mnScanlineSize; + nOffset = -rSrcBuffer.mnScanlineSize; + } + + for (tools::Long i = 0; i < rSrcBuffer.mnHeight; i++, pTmpScan += nOffset) + pSrcScan[ i ] = pTmpScan; + + // destination scanline buffer + if( pDstBuffer->mnFormat & ScanlineFormat::TopDown ) + { + pTmpScan = pDstBuffer->mpBits; + nOffset = pDstBuffer->mnScanlineSize; + } + else + { + pTmpScan = pDstBuffer->mpBits + ( pDstBuffer->mnHeight - 1 ) * pDstBuffer->mnScanlineSize; + nOffset = -pDstBuffer->mnScanlineSize; + } + + for (tools::Long i = 0; i < pDstBuffer->mnHeight; i++, pTmpScan += nOffset) + pDstScan[ i ] = pTmpScan; + + // do buffer scaling and conversion + if( rSrcBuffer.mnBitCount <= 8 && pDstBuffer->mnBitCount <= 8 ) + { + ImplPALToPAL( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel, + pSrcScan.get(), pDstScan.get(), pMapX.get(), pMapY.get() ); + } + else if( rSrcBuffer.mnBitCount <= 8 && pDstBuffer->mnBitCount > 8 ) + { + ImplPALToTC( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel, + pSrcScan.get(), pDstScan.get(), pMapX.get(), pMapY.get() ); + } + else if( rSrcBuffer.mnBitCount > 8 && pDstBuffer->mnBitCount > 8 ) + { + ImplTCToTC( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel, + pSrcScan.get(), pDstScan.get(), pMapX.get(), pMapY.get() ); + } + else + { + ImplTCToPAL( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel, + pSrcScan.get(), pDstScan.get(), pMapX.get(), pMapY.get() ); + } + + return pDstBuffer; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |