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, 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: */