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-rw-r--r--vcl/source/bitmap/BitmapEx.cxx1505
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diff --git a/vcl/source/bitmap/BitmapEx.cxx b/vcl/source/bitmap/BitmapEx.cxx
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+++ b/vcl/source/bitmap/BitmapEx.cxx
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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 .
+ */
+
+#include <sal/log.hxx>
+#include <rtl/math.hxx>
+#include <o3tl/underlyingenumvalue.hxx>
+#include <osl/diagnose.h>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <basegfx/color/bcolormodifier.hxx>
+
+#include <vcl/ImageTree.hxx>
+#include <vcl/outdev.hxx>
+#include <vcl/alpha.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/virdev.hxx>
+#include <vcl/settings.hxx>
+#include <vcl/BitmapMonochromeFilter.hxx>
+
+// BitmapEx::Create
+#include <salbmp.hxx>
+#include <salinst.hxx>
+#include <svdata.hxx>
+#include <bitmap/BitmapWriteAccess.hxx>
+#include <bitmap/BitmapMaskToAlphaFilter.hxx>
+
+#include <o3tl/any.hxx>
+
+#include <com/sun/star/beans/XFastPropertySet.hpp>
+
+#include <memory>
+
+using namespace ::com::sun::star;
+
+BitmapEx::BitmapEx()
+{
+}
+
+BitmapEx::BitmapEx( const BitmapEx& ) = default;
+
+BitmapEx::BitmapEx( const BitmapEx& rBitmapEx, Point aSrc, Size aSize )
+{
+ if( rBitmapEx.IsEmpty() || aSize.IsEmpty() )
+ return;
+
+ maBitmap = Bitmap(aSize, rBitmapEx.maBitmap.getPixelFormat());
+ SetSizePixel(aSize);
+ if( rBitmapEx.IsAlpha() )
+ maAlphaMask = AlphaMask( aSize ).ImplGetBitmap();
+
+ tools::Rectangle aDestRect( Point( 0, 0 ), aSize );
+ tools::Rectangle aSrcRect( aSrc, aSize );
+ CopyPixel( aDestRect, aSrcRect, &rBitmapEx );
+}
+
+BitmapEx::BitmapEx(Size aSize, vcl::PixelFormat ePixelFormat)
+{
+ maBitmap = Bitmap(aSize, ePixelFormat);
+ SetSizePixel(aSize);
+}
+
+BitmapEx::BitmapEx( const OUString& rIconName )
+{
+ loadFromIconTheme( rIconName );
+}
+
+void BitmapEx::loadFromIconTheme( const OUString& rIconName )
+{
+ bool bSuccess;
+ OUString aIconTheme;
+
+ try
+ {
+ aIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
+ bSuccess = ImageTree::get().loadImage(rIconName, aIconTheme, *this, true);
+ }
+ catch (...)
+ {
+ bSuccess = false;
+ }
+
+ SAL_WARN_IF( !bSuccess, "vcl", "BitmapEx::BitmapEx(): could not load image " << rIconName << " via icon theme " << aIconTheme);
+}
+
+BitmapEx::BitmapEx( const Bitmap& rBmp ) :
+ maBitmap ( rBmp ),
+ maBitmapSize ( maBitmap.GetSizePixel() )
+{
+}
+
+BitmapEx::BitmapEx( const Bitmap& rBmp, const Bitmap& rMask ) :
+ maBitmap ( rBmp ),
+ maBitmapSize ( maBitmap.GetSizePixel() )
+{
+ if (rMask.IsEmpty())
+ return;
+
+ if( rMask.getPixelFormat() == vcl::PixelFormat::N8_BPP && rMask.HasGreyPalette8Bit() )
+ maAlphaMask = rMask;
+ else if (rMask.getPixelFormat() == vcl::PixelFormat::N1_BPP)
+ {
+ // convert 1-bit mask to alpha bitmap
+ BitmapEx aBmpEx(rMask);
+ BitmapFilter::Filter(aBmpEx, BitmapMaskToAlphaFilter());
+ maAlphaMask = aBmpEx.GetBitmap();
+ }
+ else
+ {
+ // convert to alpha bitmap
+ SAL_WARN( "vcl", "BitmapEx: forced mask to monochrome");
+ BitmapEx aMaskEx(rMask);
+ BitmapFilter::Filter(aMaskEx, BitmapMonochromeFilter(255));
+ BitmapFilter::Filter(aMaskEx, BitmapMaskToAlphaFilter());
+ maAlphaMask = aMaskEx.GetBitmap();
+ }
+
+ if (!maBitmap.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel())
+ {
+ OSL_ENSURE(false, "Mask size differs from Bitmap size, corrected Mask (!)");
+ maAlphaMask.Scale(maBitmap.GetSizePixel(), BmpScaleFlag::Fast);
+ }
+}
+
+BitmapEx::BitmapEx( const Bitmap& rBmp, const AlphaMask& rAlphaMask ) :
+ maBitmap ( rBmp ),
+ maAlphaMask ( rAlphaMask.ImplGetBitmap() ),
+ maBitmapSize ( maBitmap.GetSizePixel() )
+{
+ if (!maBitmap.IsEmpty() && !maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel())
+ {
+ OSL_ENSURE(false, "Alpha size differs from Bitmap size, corrected Mask (!)");
+ maAlphaMask.Scale(rBmp.GetSizePixel(), BmpScaleFlag::Fast);
+ }
+}
+
+
+BitmapEx::BitmapEx( const Bitmap& rBmp, const Color& rTransparentColor ) :
+ maBitmap ( rBmp ),
+ maBitmapSize ( maBitmap.GetSizePixel() )
+{
+ maAlphaMask = maBitmap.CreateMask( rTransparentColor );
+
+ SAL_WARN_IF(rBmp.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
+ "BitmapEx::BitmapEx(): size mismatch for bitmap and alpha mask.");
+}
+
+
+BitmapEx& BitmapEx::operator=( const BitmapEx& ) = default;
+
+bool BitmapEx::operator==( const BitmapEx& rBitmapEx ) const
+{
+ if (GetSizePixel() != rBitmapEx.GetSizePixel())
+ return false;
+
+ if (maBitmap != rBitmapEx.maBitmap)
+ return false;
+
+ return maAlphaMask == rBitmapEx.maAlphaMask;
+}
+
+bool BitmapEx::IsEmpty() const
+{
+ return( maBitmap.IsEmpty() && maAlphaMask.IsEmpty() );
+}
+
+void BitmapEx::SetEmpty()
+{
+ maBitmap.SetEmpty();
+ maAlphaMask.SetEmpty();
+}
+
+void BitmapEx::Clear()
+{
+ SetEmpty();
+}
+
+bool BitmapEx::IsAlpha() const
+{
+ return !maAlphaMask.IsEmpty();
+}
+
+const Bitmap& BitmapEx::GetBitmap() const
+{
+ return maBitmap;
+}
+
+Bitmap BitmapEx::GetBitmap( Color aTransparentReplaceColor ) const
+{
+ Bitmap aRetBmp( maBitmap );
+
+ if( !maAlphaMask.IsEmpty() )
+ {
+ aRetBmp.Replace( maAlphaMask, aTransparentReplaceColor );
+ }
+
+ return aRetBmp;
+}
+
+AlphaMask BitmapEx::GetAlpha() const
+{
+ return AlphaMask(maAlphaMask);
+}
+
+sal_Int64 BitmapEx::GetSizeBytes() const
+{
+ sal_Int64 nSizeBytes = maBitmap.GetSizeBytes();
+
+ if( !maAlphaMask.IsEmpty() )
+ nSizeBytes += maAlphaMask.GetSizeBytes();
+
+ return nSizeBytes;
+}
+
+BitmapChecksum BitmapEx::GetChecksum() const
+{
+ BitmapChecksum nCrc = maBitmap.GetChecksum();
+
+ if( !maAlphaMask.IsEmpty() )
+ {
+ BitmapChecksumOctetArray aBCOA;
+ BCToBCOA( maAlphaMask.GetChecksum(), aBCOA );
+ nCrc = vcl_get_checksum( nCrc, aBCOA, BITMAP_CHECKSUM_SIZE );
+ }
+
+ return nCrc;
+}
+
+void BitmapEx::SetSizePixel(const Size& rNewSize)
+{
+ maBitmapSize = rNewSize;
+}
+
+bool BitmapEx::Invert()
+{
+ bool bRet = false;
+
+ if (!maBitmap.IsEmpty())
+ bRet = maBitmap.Invert();
+
+ return bRet;
+}
+
+bool BitmapEx::Mirror( BmpMirrorFlags nMirrorFlags )
+{
+ bool bRet = false;
+
+ if( !maBitmap.IsEmpty() )
+ {
+ bRet = maBitmap.Mirror( nMirrorFlags );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ maAlphaMask.Mirror( nMirrorFlags );
+ }
+
+ return bRet;
+}
+
+bool BitmapEx::Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag )
+{
+ bool bRet = false;
+
+ if( !maBitmap.IsEmpty() )
+ {
+ bRet = maBitmap.Scale( rScaleX, rScaleY, nScaleFlag );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ {
+ maAlphaMask.Scale( rScaleX, rScaleY, nScaleFlag );
+ }
+
+ SetSizePixel(maBitmap.GetSizePixel());
+
+ SAL_WARN_IF( !maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
+ "BitmapEx::Scale(): size mismatch for bitmap and alpha mask." );
+ }
+
+ return bRet;
+}
+
+bool BitmapEx::Scale( const Size& rNewSize, BmpScaleFlag nScaleFlag )
+{
+ bool bRet;
+
+ if (GetSizePixel().Width() && GetSizePixel().Height()
+ && (rNewSize.Width() != GetSizePixel().Width()
+ || rNewSize.Height() != GetSizePixel().Height() ) )
+ {
+ bRet = Scale( static_cast<double>(rNewSize.Width()) / GetSizePixel().Width(),
+ static_cast<double>(rNewSize.Height()) / GetSizePixel().Height(),
+ nScaleFlag );
+ }
+ else
+ {
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+bool BitmapEx::Rotate( Degree10 nAngle10, const Color& rFillColor )
+{
+ bool bRet = false;
+
+ if( !maBitmap.IsEmpty() )
+ {
+ const bool bTransRotate = ( COL_TRANSPARENT == rFillColor );
+
+ if( bTransRotate )
+ {
+ bRet = maBitmap.Rotate( nAngle10, COL_BLACK );
+
+ if( maAlphaMask.IsEmpty() )
+ {
+ maAlphaMask = Bitmap(GetSizePixel(), vcl::PixelFormat::N8_BPP, &Bitmap::GetGreyPalette(256));
+ maAlphaMask.Erase( COL_BLACK );
+ }
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ maAlphaMask.Rotate( nAngle10, COL_WHITE );
+ }
+ else
+ {
+ bRet = maBitmap.Rotate( nAngle10, rFillColor );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ maAlphaMask.Rotate( nAngle10, COL_WHITE );
+ }
+
+ SetSizePixel(maBitmap.GetSizePixel());
+
+ SAL_WARN_IF(!maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
+ "BitmapEx::Rotate(): size mismatch for bitmap and alpha mask.");
+ }
+
+ return bRet;
+}
+
+bool BitmapEx::Crop( const tools::Rectangle& rRectPixel )
+{
+ bool bRet = false;
+
+ if( !maBitmap.IsEmpty() )
+ {
+ bRet = maBitmap.Crop( rRectPixel );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ maAlphaMask.Crop( rRectPixel );
+
+ SetSizePixel(maBitmap.GetSizePixel());
+
+ SAL_WARN_IF(!maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
+ "BitmapEx::Crop(): size mismatch for bitmap and alpha mask.");
+ }
+
+ return bRet;
+}
+
+bool BitmapEx::Convert( BmpConversion eConversion )
+{
+ return !maBitmap.IsEmpty() && maBitmap.Convert( eConversion );
+}
+
+void BitmapEx::Expand( sal_Int32 nDX, sal_Int32 nDY, bool bExpandTransparent )
+{
+ bool bRet = false;
+
+ if( maBitmap.IsEmpty() )
+ return;
+
+ bRet = maBitmap.Expand( nDX, nDY );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ {
+ Color aColor( bExpandTransparent ? COL_WHITE : COL_BLACK );
+ maAlphaMask.Expand( nDX, nDY, &aColor );
+ }
+
+ SetSizePixel(maBitmap.GetSizePixel());
+
+ SAL_WARN_IF(!maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
+ "BitmapEx::Expand(): size mismatch for bitmap and alpha mask.");
+}
+
+bool BitmapEx::CopyPixel( const tools::Rectangle& rRectDst, const tools::Rectangle& rRectSrc,
+ const BitmapEx* pBmpExSrc )
+{
+ bool bRet = false;
+
+ if( !pBmpExSrc || pBmpExSrc->IsEmpty() )
+ {
+ if( !maBitmap.IsEmpty() )
+ {
+ bRet = maBitmap.CopyPixel( rRectDst, rRectSrc );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ maAlphaMask.CopyPixel( rRectDst, rRectSrc );
+ }
+ }
+ else
+ {
+ if( !maBitmap.IsEmpty() )
+ {
+ bRet = maBitmap.CopyPixel( rRectDst, rRectSrc, &pBmpExSrc->maBitmap );
+
+ if( bRet )
+ {
+ if( pBmpExSrc->IsAlpha() )
+ {
+ if( IsAlpha() )
+ // cast to use the optimized AlphaMask::CopyPixel
+ maAlphaMask.CopyPixel_AlphaOptimized( rRectDst, rRectSrc, &pBmpExSrc->maAlphaMask );
+ else
+ {
+ sal_uInt8 cBlack = 0;
+ std::unique_ptr<AlphaMask> pAlpha(new AlphaMask(GetSizePixel(), &cBlack));
+
+ maAlphaMask = pAlpha->ImplGetBitmap();
+ pAlpha.reset();
+ maAlphaMask.CopyPixel( rRectDst, rRectSrc, &pBmpExSrc->maAlphaMask );
+ }
+ }
+ else if (IsAlpha())
+ {
+ sal_uInt8 cBlack = 0;
+ const AlphaMask aAlphaSrc(pBmpExSrc->GetSizePixel(), &cBlack);
+
+ maAlphaMask.CopyPixel( rRectDst, rRectSrc, &aAlphaSrc.ImplGetBitmap() );
+ }
+ }
+ }
+ }
+
+ return bRet;
+}
+
+bool BitmapEx::Erase( const Color& rFillColor )
+{
+ bool bRet = false;
+
+ if( !maBitmap.IsEmpty() )
+ {
+ bRet = maBitmap.Erase( rFillColor );
+
+ if( bRet && !maAlphaMask.IsEmpty() )
+ {
+ // Respect transparency on fill color
+ if( rFillColor.IsTransparent() )
+ {
+ const Color aFill( 255 - rFillColor.GetAlpha(), 255 - rFillColor.GetAlpha(), 255 - rFillColor.GetAlpha() );
+ maAlphaMask.Erase( aFill );
+ }
+ else
+ {
+ const Color aBlack( COL_BLACK );
+ maAlphaMask.Erase( aBlack );
+ }
+ }
+ }
+
+ return bRet;
+}
+
+void BitmapEx::Replace( const Color& rSearchColor, const Color& rReplaceColor )
+{
+ if (!maBitmap.IsEmpty())
+ maBitmap.Replace( rSearchColor, rReplaceColor );
+}
+
+void BitmapEx::Replace( const Color* pSearchColors, const Color* pReplaceColors, size_t nColorCount )
+{
+ if (!maBitmap.IsEmpty())
+ maBitmap.Replace( pSearchColors, pReplaceColors, nColorCount, /*pTols*/nullptr );
+}
+
+bool BitmapEx::Adjust( short nLuminancePercent, short nContrastPercent,
+ short nChannelRPercent, short nChannelGPercent, short nChannelBPercent,
+ double fGamma, bool bInvert, bool msoBrightness )
+{
+ return !maBitmap.IsEmpty() && maBitmap.Adjust( nLuminancePercent, nContrastPercent,
+ nChannelRPercent, nChannelGPercent, nChannelBPercent,
+ fGamma, bInvert, msoBrightness );
+}
+
+void BitmapEx::Draw( OutputDevice* pOutDev, const Point& rDestPt ) const
+{
+ pOutDev->DrawBitmapEx( rDestPt, *this );
+}
+
+void BitmapEx::Draw( OutputDevice* pOutDev,
+ const Point& rDestPt, const Size& rDestSize ) const
+{
+ pOutDev->DrawBitmapEx( rDestPt, rDestSize, *this );
+}
+
+BitmapEx BitmapEx:: AutoScaleBitmap(BitmapEx const & aBitmap, const tools::Long aStandardSize)
+{
+ Point aEmptyPoint(0,0);
+ double imgposX = 0;
+ double imgposY = 0;
+ BitmapEx aRet = aBitmap;
+ double imgOldWidth = aRet.GetSizePixel().Width();
+ double imgOldHeight = aRet.GetSizePixel().Height();
+
+ if (imgOldWidth >= aStandardSize || imgOldHeight >= aStandardSize)
+ {
+ sal_Int32 imgNewWidth = 0;
+ sal_Int32 imgNewHeight = 0;
+ if (imgOldWidth >= imgOldHeight)
+ {
+ imgNewWidth = aStandardSize;
+ imgNewHeight = sal_Int32(imgOldHeight / (imgOldWidth / aStandardSize) + 0.5);
+ imgposX = 0;
+ imgposY = (aStandardSize - (imgOldHeight / (imgOldWidth / aStandardSize) + 0.5)) / 2 + 0.5;
+ }
+ else
+ {
+ imgNewHeight = aStandardSize;
+ imgNewWidth = sal_Int32(imgOldWidth / (imgOldHeight / aStandardSize) + 0.5);
+ imgposY = 0;
+ imgposX = (aStandardSize - (imgOldWidth / (imgOldHeight / aStandardSize) + 0.5)) / 2 + 0.5;
+ }
+
+ Size aScaledSize( imgNewWidth, imgNewHeight );
+ aRet.Scale( aScaledSize, BmpScaleFlag::BestQuality );
+ }
+ else
+ {
+ imgposX = (aStandardSize - imgOldWidth) / 2 + 0.5;
+ imgposY = (aStandardSize - imgOldHeight) / 2 + 0.5;
+ }
+
+ Size aStdSize( aStandardSize, aStandardSize );
+ tools::Rectangle aRect(aEmptyPoint, aStdSize );
+
+ ScopedVclPtrInstance< VirtualDevice > aVirDevice(*Application::GetDefaultDevice());
+ aVirDevice->SetOutputSizePixel( aStdSize );
+ aVirDevice->SetFillColor( COL_TRANSPARENT );
+ aVirDevice->SetLineColor( COL_TRANSPARENT );
+
+ // Draw a rect into virDevice
+ aVirDevice->DrawRect( aRect );
+ Point aPointPixel( static_cast<tools::Long>(imgposX), static_cast<tools::Long>(imgposY) );
+ aVirDevice->DrawBitmapEx( aPointPixel, aRet );
+ aRet = aVirDevice->GetBitmapEx( aEmptyPoint, aStdSize );
+
+ return aRet;
+}
+
+sal_uInt8 BitmapEx::GetAlpha(sal_Int32 nX, sal_Int32 nY) const
+{
+ if(maBitmap.IsEmpty())
+ return 0;
+
+ if (nX < 0 || nX >= GetSizePixel().Width() || nY < 0 || nY >= GetSizePixel().Height())
+ return 0;
+
+ if (maBitmap.getPixelFormat() == vcl::PixelFormat::N32_BPP)
+ return GetPixelColor(nX, nY).GetAlpha();
+
+ sal_uInt8 nAlpha(0);
+ if (maAlphaMask.IsEmpty())
+ {
+ // Not transparent, ergo all covered
+ nAlpha = 255;
+ }
+ else
+ {
+ Bitmap aTestBitmap(maAlphaMask);
+ Bitmap::ScopedReadAccess pRead(aTestBitmap);
+
+ if(pRead)
+ {
+ const BitmapColor aBitmapColor(pRead->GetPixel(nY, nX));
+ nAlpha = 255 - aBitmapColor.GetIndex();
+ }
+ }
+ return nAlpha;
+}
+
+
+Color BitmapEx::GetPixelColor(sal_Int32 nX, sal_Int32 nY) const
+{
+ Bitmap::ScopedReadAccess pReadAccess( const_cast<Bitmap&>(maBitmap) );
+ assert(pReadAccess);
+
+ BitmapColor aColor = pReadAccess->GetColor(nY, nX);
+
+ if (IsAlpha())
+ {
+ AlphaMask aAlpha = GetAlpha();
+ AlphaMask::ScopedReadAccess pAlphaReadAccess(aAlpha);
+ aColor.SetAlpha(255 - pAlphaReadAccess->GetPixel(nY, nX).GetIndex());
+ }
+ else if (maBitmap.getPixelFormat() != vcl::PixelFormat::N32_BPP)
+ {
+ aColor.SetAlpha(255);
+ }
+ return aColor;
+}
+
+// Shift alpha transparent pixels between cppcanvas/ implementations
+// and vcl in a generally grotesque and under-performing fashion
+bool BitmapEx::Create( const css::uno::Reference< css::rendering::XBitmapCanvas > &xBitmapCanvas,
+ const Size &rSize )
+{
+ uno::Reference< beans::XFastPropertySet > xFastPropertySet( xBitmapCanvas, uno::UNO_QUERY );
+ if( xFastPropertySet )
+ {
+ // 0 means get BitmapEx
+ uno::Any aAny = xFastPropertySet->getFastPropertyValue( 0 );
+ std::unique_ptr<BitmapEx> xBitmapEx(reinterpret_cast<BitmapEx*>(*o3tl::doAccess<sal_Int64>(aAny)));
+ if( xBitmapEx )
+ {
+ *this = *xBitmapEx;
+ return true;
+ }
+ }
+
+ std::shared_ptr<SalBitmap> pSalBmp;
+ std::shared_ptr<SalBitmap> pSalMask;
+
+ pSalBmp = ImplGetSVData()->mpDefInst->CreateSalBitmap();
+
+ Size aLocalSize(rSize);
+ if( pSalBmp->Create( xBitmapCanvas, aLocalSize ) )
+ {
+ pSalMask = ImplGetSVData()->mpDefInst->CreateSalBitmap();
+ if ( pSalMask->Create( xBitmapCanvas, aLocalSize, true ) )
+ {
+ *this = BitmapEx(Bitmap(pSalBmp), Bitmap(pSalMask) );
+ return true;
+ }
+ else
+ {
+ *this = BitmapEx(Bitmap(pSalBmp));
+ return true;
+ }
+ }
+
+ return false;
+}
+
+namespace
+{
+ Bitmap impTransformBitmap(
+ const Bitmap& rSource,
+ const Size& rDestinationSize,
+ const basegfx::B2DHomMatrix& rTransform,
+ bool bSmooth)
+ {
+ Bitmap aDestination(rDestinationSize, vcl::PixelFormat::N24_BPP);
+ BitmapScopedWriteAccess xWrite(aDestination);
+
+ if(xWrite)
+ {
+ Bitmap::ScopedReadAccess xRead(const_cast< Bitmap& >(rSource));
+
+ if (xRead)
+ {
+ const Size aDestinationSizePixel(aDestination.GetSizePixel());
+ const BitmapColor aOutside(BitmapColor(0xff, 0xff, 0xff));
+
+ for(tools::Long y(0); y < aDestinationSizePixel.getHeight(); y++)
+ {
+ Scanline pScanline = xWrite->GetScanline( y );
+ for(tools::Long x(0); x < aDestinationSizePixel.getWidth(); x++)
+ {
+ const basegfx::B2DPoint aSourceCoor(rTransform * basegfx::B2DPoint(x, y));
+
+ if(bSmooth)
+ {
+ xWrite->SetPixelOnData(
+ pScanline,
+ x,
+ xRead->GetInterpolatedColorWithFallback(
+ aSourceCoor.getY(),
+ aSourceCoor.getX(),
+ aOutside));
+ }
+ else
+ {
+ // this version does the correct <= 0.0 checks, so no need
+ // to do the static_cast< sal_Int32 > self and make an error
+ xWrite->SetPixelOnData(
+ pScanline,
+ x,
+ xRead->GetColorWithFallback(
+ aSourceCoor.getY(),
+ aSourceCoor.getX(),
+ aOutside));
+ }
+ }
+ }
+ }
+ }
+ xWrite.reset();
+
+ rSource.AdaptBitCount(aDestination);
+
+ return aDestination;
+ }
+
+ /// Decides if rTransformation needs smoothing or not (e.g. 180 deg rotation doesn't need it).
+ bool implTransformNeedsSmooth(const basegfx::B2DHomMatrix& rTransformation)
+ {
+ basegfx::B2DVector aScale, aTranslate;
+ double fRotate, fShearX;
+ rTransformation.decompose(aScale, aTranslate, fRotate, fShearX);
+ if (aScale != basegfx::B2DVector(1, 1))
+ {
+ return true;
+ }
+
+ fRotate = fmod( fRotate, 2 * M_PI );
+ if (fRotate < 0)
+ {
+ fRotate += 2 * M_PI;
+ }
+ if (!rtl::math::approxEqual(fRotate, 0)
+ && !rtl::math::approxEqual(fRotate, M_PI_2)
+ && !rtl::math::approxEqual(fRotate, M_PI)
+ && !rtl::math::approxEqual(fRotate, 3 * M_PI_2))
+ {
+ return true;
+ }
+
+ if (!rtl::math::approxEqual(fShearX, 0))
+ {
+ return true;
+ }
+
+ return false;
+ }
+} // end of anonymous namespace
+
+BitmapEx BitmapEx::TransformBitmapEx(
+ double fWidth,
+ double fHeight,
+ const basegfx::B2DHomMatrix& rTransformation) const
+{
+ if(fWidth <= 1 || fHeight <= 1)
+ return BitmapEx();
+
+ // force destination to 24 bit, we want to smooth output
+ const Size aDestinationSize(basegfx::fround(fWidth), basegfx::fround(fHeight));
+ bool bSmooth = implTransformNeedsSmooth(rTransformation);
+ const Bitmap aDestination(impTransformBitmap(GetBitmap(), aDestinationSize, rTransformation, bSmooth));
+
+ // create mask
+ if(IsAlpha())
+ {
+ const Bitmap aAlpha(impTransformBitmap(GetAlpha().GetBitmap(), aDestinationSize, rTransformation, bSmooth));
+ return BitmapEx(aDestination, AlphaMask(aAlpha));
+ }
+
+ return BitmapEx(aDestination);
+}
+
+BitmapEx BitmapEx::getTransformed(
+ const basegfx::B2DHomMatrix& rTransformation,
+ const basegfx::B2DRange& rVisibleRange,
+ double fMaximumArea) const
+{
+ BitmapEx aRetval;
+
+ if(IsEmpty())
+ return aRetval;
+
+ const sal_uInt32 nSourceWidth(GetSizePixel().Width());
+ const sal_uInt32 nSourceHeight(GetSizePixel().Height());
+
+ if(!nSourceWidth || !nSourceHeight)
+ return aRetval;
+
+ // Get aOutlineRange
+ basegfx::B2DRange aOutlineRange(0.0, 0.0, 1.0, 1.0);
+
+ aOutlineRange.transform(rTransformation);
+
+ // create visible range from it by moving from relative to absolute
+ basegfx::B2DRange aVisibleRange(rVisibleRange);
+
+ aVisibleRange.transform(
+ basegfx::utils::createScaleTranslateB2DHomMatrix(
+ aOutlineRange.getRange(),
+ aOutlineRange.getMinimum()));
+
+ // get target size (which is visible range's size)
+ double fWidth(aVisibleRange.getWidth());
+ double fHeight(aVisibleRange.getHeight());
+
+ if(fWidth < 1.0 || fHeight < 1.0)
+ {
+ return aRetval;
+ }
+
+ // test if discrete size (pixel) maybe too big and limit it
+ const double fArea(fWidth * fHeight);
+ const bool bNeedToReduce(basegfx::fTools::more(fArea, fMaximumArea));
+ double fReduceFactor(1.0);
+
+ if(bNeedToReduce)
+ {
+ fReduceFactor = sqrt(fMaximumArea / fArea);
+ fWidth *= fReduceFactor;
+ fHeight *= fReduceFactor;
+ }
+
+ // Build complete transform from source pixels to target pixels.
+ // Start by scaling from source pixel size to unit coordinates
+ basegfx::B2DHomMatrix aTransform(
+ basegfx::utils::createScaleB2DHomMatrix(
+ 1.0 / nSourceWidth,
+ 1.0 / nSourceHeight));
+
+ // multiply with given transform which leads from unit coordinates inside
+ // aOutlineRange
+ aTransform = rTransformation * aTransform;
+
+ // subtract top-left of absolute VisibleRange
+ aTransform.translate(
+ -aVisibleRange.getMinX(),
+ -aVisibleRange.getMinY());
+
+ // scale to target pixels (if needed)
+ if(bNeedToReduce)
+ {
+ aTransform.scale(fReduceFactor, fReduceFactor);
+ }
+
+ // invert to get transformation from target pixel coordinates to source pixels
+ aTransform.invert();
+
+ // create bitmap using source, destination and linear back-transformation
+ aRetval = TransformBitmapEx(fWidth, fHeight, aTransform);
+
+ return aRetval;
+}
+
+BitmapEx BitmapEx::ModifyBitmapEx(const basegfx::BColorModifierStack& rBColorModifierStack) const
+{
+ Bitmap aChangedBitmap(GetBitmap());
+ bool bDone(false);
+
+ for(sal_uInt32 a(rBColorModifierStack.count()); a && !bDone; )
+ {
+ const basegfx::BColorModifierSharedPtr& rModifier = rBColorModifierStack.getBColorModifier(--a);
+ const basegfx::BColorModifier_replace* pReplace = dynamic_cast< const basegfx::BColorModifier_replace* >(rModifier.get());
+
+ if(pReplace)
+ {
+ // complete replace
+ if(IsAlpha())
+ {
+ // clear bitmap with dest color
+ if (vcl::isPalettePixelFormat(aChangedBitmap.getPixelFormat()))
+ {
+ // For e.g. 8bit Bitmaps, the nearest color to the given erase color is
+ // determined and used -> this may be different from what is wanted here.
+ // Better create a new bitmap with the needed color explicitly.
+ Bitmap::ScopedReadAccess xReadAccess(aChangedBitmap);
+ OSL_ENSURE(xReadAccess, "Got no Bitmap ReadAccess ?!?");
+
+ if(xReadAccess)
+ {
+ BitmapPalette aNewPalette(xReadAccess->GetPalette());
+ aNewPalette[0] = BitmapColor(Color(pReplace->getBColor()));
+ aChangedBitmap = Bitmap(
+ aChangedBitmap.GetSizePixel(),
+ aChangedBitmap.getPixelFormat(),
+ &aNewPalette);
+ }
+ }
+ aChangedBitmap.Erase(Color(pReplace->getBColor()));
+ }
+ else
+ {
+ // erase bitmap, caller will know to paint direct
+ aChangedBitmap.SetEmpty();
+ }
+
+ bDone = true;
+ }
+ else
+ {
+ BitmapScopedWriteAccess xContent(aChangedBitmap);
+
+ if(xContent)
+ {
+ const double fConvertColor(1.0 / 255.0);
+
+ if(xContent->HasPalette())
+ {
+ const sal_uInt16 nCount(xContent->GetPaletteEntryCount());
+
+ for(sal_uInt16 b(0); b < nCount; b++)
+ {
+ const BitmapColor& rCol = xContent->GetPaletteColor(b);
+ const basegfx::BColor aBSource(
+ rCol.GetRed() * fConvertColor,
+ rCol.GetGreen() * fConvertColor,
+ rCol.GetBlue() * fConvertColor);
+ const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
+ xContent->SetPaletteColor(b, BitmapColor(Color(aBDest)));
+ }
+ }
+ else if(ScanlineFormat::N24BitTcBgr == xContent->GetScanlineFormat())
+ {
+ for(tools::Long y(0); y < xContent->Height(); y++)
+ {
+ Scanline pScan = xContent->GetScanline(y);
+
+ for(tools::Long x(0); x < xContent->Width(); x++)
+ {
+ const basegfx::BColor aBSource(
+ *(pScan + 2)* fConvertColor,
+ *(pScan + 1) * fConvertColor,
+ *pScan * fConvertColor);
+ const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
+ *pScan++ = static_cast< sal_uInt8 >(aBDest.getBlue() * 255.0);
+ *pScan++ = static_cast< sal_uInt8 >(aBDest.getGreen() * 255.0);
+ *pScan++ = static_cast< sal_uInt8 >(aBDest.getRed() * 255.0);
+ }
+ }
+ }
+ else if(ScanlineFormat::N24BitTcRgb == xContent->GetScanlineFormat())
+ {
+ for(tools::Long y(0); y < xContent->Height(); y++)
+ {
+ Scanline pScan = xContent->GetScanline(y);
+
+ for(tools::Long x(0); x < xContent->Width(); x++)
+ {
+ const basegfx::BColor aBSource(
+ *pScan * fConvertColor,
+ *(pScan + 1) * fConvertColor,
+ *(pScan + 2) * fConvertColor);
+ const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
+ *pScan++ = static_cast< sal_uInt8 >(aBDest.getRed() * 255.0);
+ *pScan++ = static_cast< sal_uInt8 >(aBDest.getGreen() * 255.0);
+ *pScan++ = static_cast< sal_uInt8 >(aBDest.getBlue() * 255.0);
+ }
+ }
+ }
+ else
+ {
+ for(tools::Long y(0); y < xContent->Height(); y++)
+ {
+ Scanline pScanline = xContent->GetScanline( y );
+ for(tools::Long x(0); x < xContent->Width(); x++)
+ {
+ const BitmapColor aBMCol(xContent->GetColor(y, x));
+ const basegfx::BColor aBSource(
+ static_cast<double>(aBMCol.GetRed()) * fConvertColor,
+ static_cast<double>(aBMCol.GetGreen()) * fConvertColor,
+ static_cast<double>(aBMCol.GetBlue()) * fConvertColor);
+ const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
+
+ xContent->SetPixelOnData(pScanline, x, BitmapColor(Color(aBDest)));
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if(aChangedBitmap.IsEmpty())
+ {
+ return BitmapEx();
+ }
+ else
+ {
+ if(IsAlpha())
+ {
+ return BitmapEx(aChangedBitmap, GetAlpha());
+ }
+ else
+ {
+ return BitmapEx(aChangedBitmap);
+ }
+ }
+}
+
+BitmapEx createBlendFrame(
+ const Size& rSize,
+ sal_uInt8 nAlpha,
+ Color aColorTopLeft,
+ Color aColorBottomRight)
+{
+ const sal_uInt32 nW(rSize.Width());
+ const sal_uInt32 nH(rSize.Height());
+
+ if(nW || nH)
+ {
+ Color aColTopRight(aColorTopLeft);
+ Color aColBottomLeft(aColorTopLeft);
+ const sal_uInt32 nDE(nW + nH);
+
+ aColTopRight.Merge(aColorBottomRight, 255 - sal_uInt8((nW * 255) / nDE));
+ aColBottomLeft.Merge(aColorBottomRight, 255 - sal_uInt8((nH * 255) / nDE));
+
+ return createBlendFrame(rSize, nAlpha, aColorTopLeft, aColTopRight, aColorBottomRight, aColBottomLeft);
+ }
+
+ return BitmapEx();
+}
+
+BitmapEx createBlendFrame(
+ const Size& rSize,
+ sal_uInt8 nAlpha,
+ Color aColorTopLeft,
+ Color aColorTopRight,
+ Color aColorBottomRight,
+ Color aColorBottomLeft)
+{
+ BlendFrameCache* pBlendFrameCache = ImplGetBlendFrameCache();
+
+ if(pBlendFrameCache->m_aLastSize == rSize
+ && pBlendFrameCache->m_nLastAlpha == nAlpha
+ && pBlendFrameCache->m_aLastColorTopLeft == aColorTopLeft
+ && pBlendFrameCache->m_aLastColorTopRight == aColorTopRight
+ && pBlendFrameCache->m_aLastColorBottomRight == aColorBottomRight
+ && pBlendFrameCache->m_aLastColorBottomLeft == aColorBottomLeft)
+ {
+ return pBlendFrameCache->m_aLastResult;
+ }
+
+ pBlendFrameCache->m_aLastSize = rSize;
+ pBlendFrameCache->m_nLastAlpha = nAlpha;
+ pBlendFrameCache->m_aLastColorTopLeft = aColorTopLeft;
+ pBlendFrameCache->m_aLastColorTopRight = aColorTopRight;
+ pBlendFrameCache->m_aLastColorBottomRight = aColorBottomRight;
+ pBlendFrameCache->m_aLastColorBottomLeft = aColorBottomLeft;
+ pBlendFrameCache->m_aLastResult.Clear();
+
+ const tools::Long nW(rSize.Width());
+ const tools::Long nH(rSize.Height());
+
+ if(nW > 1 && nH > 1)
+ {
+ sal_uInt8 aEraseTrans(0xff);
+ Bitmap aContent(rSize, vcl::PixelFormat::N24_BPP);
+ AlphaMask aAlpha(rSize, &aEraseTrans);
+
+ aContent.Erase(COL_BLACK);
+
+ BitmapScopedWriteAccess pContent(aContent);
+ AlphaScopedWriteAccess pAlpha(aAlpha);
+
+ if(pContent && pAlpha)
+ {
+ tools::Long x(0);
+ tools::Long y(0);
+ Scanline pScanContent = pContent->GetScanline( 0 );
+ Scanline pScanAlpha = pContent->GetScanline( 0 );
+
+ // x == 0, y == 0, top-left corner
+ pContent->SetPixelOnData(pScanContent, 0, aColorTopLeft);
+ pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
+
+ // y == 0, top line left to right
+ for(x = 1; x < nW - 1; x++)
+ {
+ Color aMix(aColorTopLeft);
+
+ aMix.Merge(aColorTopRight, 255 - sal_uInt8((x * 255) / nW));
+ pContent->SetPixelOnData(pScanContent, x, aMix);
+ pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
+ }
+
+ // x == nW - 1, y == 0, top-right corner
+ // #i123690# Caution! When nW is 1, x == nW is possible (!)
+ if(x < nW)
+ {
+ pContent->SetPixelOnData(pScanContent, x, aColorTopRight);
+ pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
+ }
+
+ // x == 0 and nW - 1, left and right line top-down
+ for(y = 1; y < nH - 1; y++)
+ {
+ pScanContent = pContent->GetScanline( y );
+ pScanAlpha = pContent->GetScanline( y );
+ Color aMixA(aColorTopLeft);
+
+ aMixA.Merge(aColorBottomLeft, 255 - sal_uInt8((y * 255) / nH));
+ pContent->SetPixelOnData(pScanContent, 0, aMixA);
+ pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
+
+ // #i123690# Caution! When nW is 1, x == nW is possible (!)
+ if(x < nW)
+ {
+ Color aMixB(aColorTopRight);
+
+ aMixB.Merge(aColorBottomRight, 255 - sal_uInt8((y * 255) / nH));
+ pContent->SetPixelOnData(pScanContent, x, aMixB);
+ pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
+ }
+ }
+
+ // #i123690# Caution! When nH is 1, y == nH is possible (!)
+ if(y < nH)
+ {
+ // x == 0, y == nH - 1, bottom-left corner
+ pContent->SetPixelOnData(pScanContent, 0, aColorBottomLeft);
+ pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
+
+ // y == nH - 1, bottom line left to right
+ for(x = 1; x < nW - 1; x++)
+ {
+ Color aMix(aColorBottomLeft);
+
+ aMix.Merge(aColorBottomRight, 255 - sal_uInt8(((x - 0)* 255) / nW));
+ pContent->SetPixelOnData(pScanContent, x, aMix);
+ pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
+ }
+
+ // x == nW - 1, y == nH - 1, bottom-right corner
+ // #i123690# Caution! When nW is 1, x == nW is possible (!)
+ if(x < nW)
+ {
+ pContent->SetPixelOnData(pScanContent, x, aColorBottomRight);
+ pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
+ }
+ }
+
+ pContent.reset();
+ pAlpha.reset();
+
+ pBlendFrameCache->m_aLastResult = BitmapEx(aContent, aAlpha);
+ }
+ }
+
+ return pBlendFrameCache->m_aLastResult;
+}
+
+void BitmapEx::Replace(const Color& rSearchColor,
+ const Color& rReplaceColor,
+ sal_uInt8 nTolerance)
+{
+ maBitmap.Replace(rSearchColor, rReplaceColor, nTolerance);
+}
+
+void BitmapEx::Replace( const Color* pSearchColors,
+ const Color* pReplaceColors,
+ size_t nColorCount,
+ sal_uInt8 const * pTols )
+{
+ maBitmap.Replace( pSearchColors, pReplaceColors, nColorCount, pTols );
+}
+
+void BitmapEx::ReplaceTransparency(const Color& rColor)
+{
+ if( IsAlpha() )
+ {
+ maBitmap.Replace( GetAlpha(), rColor );
+ maAlphaMask = Bitmap();
+ maBitmapSize = maBitmap.GetSizePixel();
+ }
+}
+
+static Bitmap DetectEdges( const Bitmap& rBmp )
+{
+ constexpr sal_uInt8 cEdgeDetectThreshold = 128;
+ const Size aSize( rBmp.GetSizePixel() );
+ Bitmap aRetBmp;
+
+ if( ( aSize.Width() > 2 ) && ( aSize.Height() > 2 ) )
+ {
+ Bitmap aWorkBmp( rBmp );
+
+ if( aWorkBmp.Convert( BmpConversion::N8BitGreys ) )
+ {
+ bool bRet = false;
+
+ ScopedVclPtr<VirtualDevice> pVirDev(VclPtr<VirtualDevice>::Create());
+ pVirDev->SetOutputSizePixel(aSize);
+ Bitmap::ScopedReadAccess pReadAcc(aWorkBmp);
+
+ if( pReadAcc )
+ {
+ const tools::Long nWidth = aSize.Width();
+ const tools::Long nWidth2 = nWidth - 2;
+ const tools::Long nHeight = aSize.Height();
+ const tools::Long nHeight2 = nHeight - 2;
+ const tools::Long lThres2 = static_cast<tools::Long>(cEdgeDetectThreshold) * cEdgeDetectThreshold;
+ tools::Long nSum1;
+ tools::Long nSum2;
+ tools::Long lGray;
+
+ // initialize border with white pixels
+ pVirDev->SetLineColor( COL_WHITE );
+ pVirDev->DrawLine( Point(), Point( nWidth - 1, 0L ) );
+ pVirDev->DrawLine( Point( nWidth - 1, 0L ), Point( nWidth - 1, nHeight - 1 ) );
+ pVirDev->DrawLine( Point( nWidth - 1, nHeight - 1 ), Point( 0L, nHeight - 1 ) );
+ pVirDev->DrawLine( Point( 0, nHeight - 1 ), Point() );
+
+ for( tools::Long nY = 0, nY1 = 1, nY2 = 2; nY < nHeight2; nY++, nY1++, nY2++ )
+ {
+ Scanline pScanlineRead = pReadAcc->GetScanline( nY );
+ Scanline pScanlineRead1 = pReadAcc->GetScanline( nY1 );
+ Scanline pScanlineRead2 = pReadAcc->GetScanline( nY2 );
+ for( tools::Long nX = 0, nXDst = 1, nXTmp; nX < nWidth2; nX++, nXDst++ )
+ {
+ nXTmp = nX;
+
+ nSum2 = pReadAcc->GetIndexFromData( pScanlineRead, nXTmp++ );
+ nSum1 = -nSum2;
+ nSum2 += static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead, nXTmp++ )) << 1;
+ lGray = pReadAcc->GetIndexFromData( pScanlineRead, nXTmp );
+ nSum1 += lGray;
+ nSum2 += lGray;
+
+ nSum1 += static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead1, nXTmp )) << 1;
+ nXTmp -= 2;
+ nSum1 -= static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead1, nXTmp )) << 1;
+
+ lGray = -static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead2, nXTmp++ ));
+ nSum1 += lGray;
+ nSum2 += lGray;
+ nSum2 -= static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead2, nXTmp++ )) << 1;
+ lGray = static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead2, nXTmp ));
+ nSum1 += lGray;
+ nSum2 -= lGray;
+
+ if( ( nSum1 * nSum1 + nSum2 * nSum2 ) < lThres2 )
+ pVirDev->DrawPixel( Point(nXDst, nY), COL_WHITE );
+ else
+ pVirDev->DrawPixel( Point(nXDst, nY), COL_BLACK );
+ }
+ }
+
+ bRet = true;
+ }
+
+ pReadAcc.reset();
+
+ if( bRet )
+ aRetBmp = pVirDev->GetBitmap(Point(0,0), aSize);
+ }
+ }
+
+ if( aRetBmp.IsEmpty() )
+ aRetBmp = rBmp;
+ else
+ {
+ aRetBmp.SetPrefMapMode( rBmp.GetPrefMapMode() );
+ aRetBmp.SetPrefSize( rBmp.GetPrefSize() );
+ }
+
+ return aRetBmp;
+}
+
+/** Get contours in image */
+tools::Polygon BitmapEx::GetContour( bool bContourEdgeDetect,
+ const tools::Rectangle* pWorkRectPixel )
+{
+ Bitmap aWorkBmp;
+ tools::Polygon aRetPoly;
+ tools::Rectangle aWorkRect( Point(), maBitmap.GetSizePixel() );
+
+ if( pWorkRectPixel )
+ aWorkRect.Intersection( *pWorkRectPixel );
+
+ aWorkRect.Justify();
+
+ if( ( aWorkRect.GetWidth() > 4 ) && ( aWorkRect.GetHeight() > 4 ) )
+ {
+ // if the flag is set, we need to detect edges
+ if( bContourEdgeDetect )
+ aWorkBmp = DetectEdges( maBitmap );
+ else
+ aWorkBmp = maBitmap;
+
+ BitmapReadAccess* pAcc = aWorkBmp.AcquireReadAccess();
+
+ const tools::Long nWidth = pAcc ? pAcc->Width() : 0;
+ const tools::Long nHeight = pAcc ? pAcc->Height() : 0;
+
+ if (pAcc && nWidth && nHeight)
+ {
+ const Size& rPrefSize = aWorkBmp.GetPrefSize();
+ const double fFactorX = static_cast<double>(rPrefSize.Width()) / nWidth;
+ const double fFactorY = static_cast<double>(rPrefSize.Height()) / nHeight;
+ const tools::Long nStartX1 = aWorkRect.Left() + 1;
+ const tools::Long nEndX1 = aWorkRect.Right();
+ const tools::Long nStartX2 = nEndX1 - 1;
+ const tools::Long nStartY1 = aWorkRect.Top() + 1;
+ const tools::Long nEndY1 = aWorkRect.Bottom();
+ std::unique_ptr<Point[]> pPoints1;
+ std::unique_ptr<Point[]> pPoints2;
+ tools::Long nX, nY;
+ sal_uInt16 nPolyPos = 0;
+ const BitmapColor aBlack = pAcc->GetBestMatchingColor( COL_BLACK );
+
+ pPoints1.reset(new Point[ nHeight ]);
+ pPoints2.reset(new Point[ nHeight ]);
+
+ for ( nY = nStartY1; nY < nEndY1; nY++ )
+ {
+ nX = nStartX1;
+ Scanline pScanline = pAcc->GetScanline( nY );
+
+ // scan row from left to right
+ while( nX < nEndX1 )
+ {
+ if( aBlack == pAcc->GetPixelFromData( pScanline, nX ) )
+ {
+ pPoints1[ nPolyPos ] = Point( nX, nY );
+ nX = nStartX2;
+
+ // this loop always breaks eventually as there is at least one pixel
+ while( true )
+ {
+ if( aBlack == pAcc->GetPixelFromData( pScanline, nX ) )
+ {
+ pPoints2[ nPolyPos ] = Point( nX, nY );
+ break;
+ }
+
+ nX--;
+ }
+
+ nPolyPos++;
+ break;
+ }
+
+ nX++;
+ }
+ }
+
+ const sal_uInt16 nNewSize1 = nPolyPos << 1;
+
+ aRetPoly = tools::Polygon( nPolyPos, pPoints1.get() );
+ aRetPoly.SetSize( nNewSize1 + 1 );
+ aRetPoly[ nNewSize1 ] = aRetPoly[ 0 ];
+
+ for( sal_uInt16 j = nPolyPos; nPolyPos < nNewSize1; )
+ aRetPoly[ nPolyPos++ ] = pPoints2[ --j ];
+
+ if( ( fFactorX != 0. ) && ( fFactorY != 0. ) )
+ aRetPoly.Scale( fFactorX, fFactorY );
+ }
+
+ Bitmap::ReleaseAccess(pAcc);
+ }
+
+ return aRetPoly;
+}
+
+void BitmapEx::setAlphaFrom( sal_uInt8 cIndexFrom, sal_Int8 nAlphaTo )
+{
+ AlphaMask aAlphaMask(GetAlpha());
+ BitmapScopedWriteAccess pWriteAccess(aAlphaMask);
+ Bitmap::ScopedReadAccess pReadAccess(maBitmap);
+ assert( pReadAccess.get() && pWriteAccess.get() );
+ if ( !(pReadAccess.get() && pWriteAccess.get()) )
+ return;
+
+ for ( tools::Long nY = 0; nY < pReadAccess->Height(); nY++ )
+ {
+ Scanline pScanline = pWriteAccess->GetScanline( nY );
+ Scanline pScanlineRead = pReadAccess->GetScanline( nY );
+ for ( tools::Long nX = 0; nX < pReadAccess->Width(); nX++ )
+ {
+ const sal_uInt8 cIndex = pReadAccess->GetPixelFromData( pScanlineRead, nX ).GetIndex();
+ if ( cIndex == cIndexFrom )
+ pWriteAccess->SetPixelOnData( pScanline, nX, BitmapColor(nAlphaTo) );
+ }
+ }
+ *this = BitmapEx( GetBitmap(), aAlphaMask );
+}
+
+void BitmapEx::AdjustTransparency(sal_uInt8 cTrans)
+{
+ AlphaMask aAlpha;
+
+ if (!IsAlpha())
+ {
+ aAlpha = AlphaMask(GetSizePixel(), &cTrans);
+ }
+ else
+ {
+ aAlpha = GetAlpha();
+ BitmapScopedWriteAccess pA(aAlpha);
+ assert(pA);
+
+ if( !pA )
+ return;
+
+ sal_uLong nTrans = cTrans, nNewTrans;
+ const tools::Long nWidth = pA->Width(), nHeight = pA->Height();
+
+ if( pA->GetScanlineFormat() == ScanlineFormat::N8BitPal )
+ {
+ for( tools::Long nY = 0; nY < nHeight; nY++ )
+ {
+ Scanline pAScan = pA->GetScanline( nY );
+
+ for( tools::Long nX = 0; nX < nWidth; nX++ )
+ {
+ nNewTrans = nTrans + *pAScan;
+ *pAScan++ = static_cast<sal_uInt8>( ( nNewTrans & 0xffffff00 ) ? 255 : nNewTrans );
+ }
+ }
+ }
+ else
+ {
+ BitmapColor aAlphaValue( 0 );
+
+ for( tools::Long nY = 0; nY < nHeight; nY++ )
+ {
+ Scanline pScanline = pA->GetScanline( nY );
+ for( tools::Long nX = 0; nX < nWidth; nX++ )
+ {
+ nNewTrans = nTrans + pA->GetIndexFromData( pScanline, nX );
+ aAlphaValue.SetIndex( static_cast<sal_uInt8>( ( nNewTrans & 0xffffff00 ) ? 255 : nNewTrans ) );
+ pA->SetPixelOnData( pScanline, nX, aAlphaValue );
+ }
+ }
+ }
+ }
+ *this = BitmapEx( GetBitmap(), aAlpha );
+}
+
+void BitmapEx::CombineMaskOr(Color maskColor, sal_uInt8 nTol)
+{
+ Bitmap aNewMask = maBitmap.CreateMask( maskColor, nTol );
+ if ( IsAlpha() )
+ aNewMask.CombineOr( maAlphaMask );
+ maAlphaMask = aNewMask;
+}
+
+/**
+ * Retrieves the color model data we need for the XImageConsumer stuff.
+ */
+void BitmapEx::GetColorModel(css::uno::Sequence< sal_Int32 >& rRGBPalette,
+ sal_uInt32& rnRedMask, sal_uInt32& rnGreenMask, sal_uInt32& rnBlueMask, sal_uInt32& rnAlphaMask, sal_uInt32& rnTransparencyIndex,
+ sal_uInt32& rnWidth, sal_uInt32& rnHeight, sal_uInt8& rnBitCount)
+{
+ Bitmap::ScopedReadAccess pReadAccess( maBitmap );
+ assert( pReadAccess );
+
+ if( pReadAccess->HasPalette() )
+ {
+ sal_uInt16 nPalCount = pReadAccess->GetPaletteEntryCount();
+
+ if( nPalCount )
+ {
+ rRGBPalette = css::uno::Sequence< sal_Int32 >( nPalCount + 1 );
+
+ sal_Int32* pTmp = rRGBPalette.getArray();
+
+ for( sal_uInt32 i = 0; i < nPalCount; i++, pTmp++ )
+ {
+ const BitmapColor& rCol = pReadAccess->GetPaletteColor( static_cast<sal_uInt16>(i) );
+
+ *pTmp = static_cast<sal_Int32>(rCol.GetRed()) << sal_Int32(24);
+ *pTmp |= static_cast<sal_Int32>(rCol.GetGreen()) << sal_Int32(16);
+ *pTmp |= static_cast<sal_Int32>(rCol.GetBlue()) << sal_Int32(8);
+ *pTmp |= sal_Int32(0x000000ffL);
+ }
+
+ if( IsAlpha() )
+ {
+ // append transparent entry
+ *pTmp = sal_Int32(0xffffff00L);
+ rnTransparencyIndex = nPalCount;
+ nPalCount++;
+ }
+ else
+ rnTransparencyIndex = 0;
+ }
+ }
+ else
+ {
+ rnRedMask = 0xff000000UL;
+ rnGreenMask = 0x00ff0000UL;
+ rnBlueMask = 0x0000ff00UL;
+ rnAlphaMask = 0x000000ffUL;
+ rnTransparencyIndex = 0;
+ }
+
+ rnWidth = pReadAccess->Width();
+ rnHeight = pReadAccess->Height();
+ rnBitCount = pReadAccess->GetBitCount();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */