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-rw-r--r--vcl/source/outdev/bitmap.cxx993
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diff --git a/vcl/source/outdev/bitmap.cxx b/vcl/source/outdev/bitmap.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 <config_features.h>
+
+#include <osl/diagnose.h>
+#include <tools/debug.hxx>
+#include <tools/helpers.hxx>
+
+#include <vcl/image.hxx>
+#include <vcl/metaact.hxx>
+#include <vcl/skia/SkiaHelper.hxx>
+#include <vcl/virdev.hxx>
+#include <vcl/BitmapWriteAccess.hxx>
+
+#include <bitmap/bmpfast.hxx>
+#include <drawmode.hxx>
+#include <salbmp.hxx>
+#include <salgdi.hxx>
+
+void OutputDevice::DrawBitmap( const Point& rDestPt, const Bitmap& rBitmap )
+{
+ assert(!is_double_buffered_window());
+
+ const Size aSizePix( rBitmap.GetSizePixel() );
+ DrawBitmap( rDestPt, PixelToLogic( aSizePix ), Point(), aSizePix, rBitmap, MetaActionType::BMP );
+}
+
+void OutputDevice::DrawBitmap( const Point& rDestPt, const Size& rDestSize, const Bitmap& rBitmap )
+{
+ assert(!is_double_buffered_window());
+
+ DrawBitmap( rDestPt, rDestSize, Point(), rBitmap.GetSizePixel(), rBitmap, MetaActionType::BMPSCALE );
+}
+
+void OutputDevice::DrawBitmap( const Point& rDestPt, const Size& rDestSize,
+ const Point& rSrcPtPixel, const Size& rSrcSizePixel,
+ const Bitmap& rBitmap)
+{
+ assert(!is_double_buffered_window());
+
+ DrawBitmap( rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel, rBitmap, MetaActionType::BMPSCALEPART );
+}
+
+void OutputDevice::DrawBitmap( const Point& rDestPt, const Size& rDestSize,
+ const Point& rSrcPtPixel, const Size& rSrcSizePixel,
+ const Bitmap& rBitmap, const MetaActionType nAction )
+{
+ assert(!is_double_buffered_window());
+
+ if( ImplIsRecordLayout() )
+ return;
+
+ if ( RasterOp::Invert == meRasterOp )
+ {
+ DrawRect( tools::Rectangle( rDestPt, rDestSize ) );
+ return;
+ }
+
+ Bitmap aBmp( rBitmap );
+
+ if ( mnDrawMode & ( DrawModeFlags::BlackBitmap | DrawModeFlags::WhiteBitmap |
+ DrawModeFlags::GrayBitmap ) )
+ {
+ if ( mnDrawMode & ( DrawModeFlags::BlackBitmap | DrawModeFlags::WhiteBitmap ) )
+ {
+ sal_uInt8 cCmpVal;
+
+ if ( mnDrawMode & DrawModeFlags::BlackBitmap )
+ cCmpVal = 0;
+ else
+ cCmpVal = 255;
+
+ Color aCol( cCmpVal, cCmpVal, cCmpVal );
+ Push( vcl::PushFlags::LINECOLOR | vcl::PushFlags::FILLCOLOR );
+ SetLineColor( aCol );
+ SetFillColor( aCol );
+ DrawRect( tools::Rectangle( rDestPt, rDestSize ) );
+ Pop();
+ return;
+ }
+ else if( !aBmp.IsEmpty() )
+ {
+ if ( mnDrawMode & DrawModeFlags::GrayBitmap )
+ aBmp.Convert( BmpConversion::N8BitGreys );
+ }
+ }
+
+ if ( mpMetaFile )
+ {
+ switch( nAction )
+ {
+ case MetaActionType::BMP:
+ mpMetaFile->AddAction( new MetaBmpAction( rDestPt, aBmp ) );
+ break;
+
+ case MetaActionType::BMPSCALE:
+ mpMetaFile->AddAction( new MetaBmpScaleAction( rDestPt, rDestSize, aBmp ) );
+ break;
+
+ case MetaActionType::BMPSCALEPART:
+ mpMetaFile->AddAction( new MetaBmpScalePartAction(
+ rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel, aBmp ) );
+ break;
+
+ default: break;
+ }
+ }
+
+ if ( !IsDeviceOutputNecessary() )
+ return;
+
+ if (!mpGraphics && !AcquireGraphics())
+ return;
+ assert(mpGraphics);
+
+ if ( mbInitClipRegion )
+ InitClipRegion();
+
+ if ( mbOutputClipped )
+ return;
+
+ if( !aBmp.IsEmpty() )
+ {
+ SalTwoRect aPosAry(rSrcPtPixel.X(), rSrcPtPixel.Y(), rSrcSizePixel.Width(), rSrcSizePixel.Height(),
+ ImplLogicXToDevicePixel(rDestPt.X()), ImplLogicYToDevicePixel(rDestPt.Y()),
+ ImplLogicWidthToDevicePixel(rDestSize.Width()),
+ ImplLogicHeightToDevicePixel(rDestSize.Height()));
+
+ if ( aPosAry.mnSrcWidth && aPosAry.mnSrcHeight && aPosAry.mnDestWidth && aPosAry.mnDestHeight )
+ {
+ const BmpMirrorFlags nMirrFlags = AdjustTwoRect( aPosAry, aBmp.GetSizePixel() );
+
+ if ( nMirrFlags != BmpMirrorFlags::NONE )
+ aBmp.Mirror( nMirrFlags );
+
+ if ( aPosAry.mnSrcWidth && aPosAry.mnSrcHeight && aPosAry.mnDestWidth && aPosAry.mnDestHeight )
+ {
+ if (nAction == MetaActionType::BMPSCALE && CanSubsampleBitmap())
+ {
+ double nScaleX = aPosAry.mnDestWidth / static_cast<double>(aPosAry.mnSrcWidth);
+ double nScaleY = aPosAry.mnDestHeight / static_cast<double>(aPosAry.mnSrcHeight);
+
+ // If subsampling, use Bitmap::Scale() for subsampling of better quality.
+
+ // but hidpi surfaces like the cairo one have their own scale, so don't downscale
+ // past the surface scaling which can retain the extra detail
+ double fScale(1.0);
+ if (mpGraphics->ShouldDownscaleIconsAtSurface(&fScale))
+ {
+ nScaleX *= fScale;
+ nScaleY *= fScale;
+ }
+
+ if ( nScaleX < 1.0 || nScaleY < 1.0 )
+ {
+ aBmp.Scale(nScaleX, nScaleY);
+ aPosAry.mnSrcWidth = aPosAry.mnDestWidth * fScale;
+ aPosAry.mnSrcHeight = aPosAry.mnDestHeight * fScale;
+ }
+ }
+
+ mpGraphics->DrawBitmap( aPosAry, *aBmp.ImplGetSalBitmap(), *this );
+ }
+ }
+ }
+
+ if( mpAlphaVDev )
+ {
+ // #i32109#: Make bitmap area opaque
+ mpAlphaVDev->ImplFillOpaqueRectangle( tools::Rectangle(rDestPt, rDestSize) );
+ }
+}
+
+Bitmap OutputDevice::GetBitmap( const Point& rSrcPt, const Size& rSize ) const
+{
+ if ( !mpGraphics && !AcquireGraphics() )
+ return Bitmap();
+
+ assert(mpGraphics);
+
+ tools::Long nX = ImplLogicXToDevicePixel( rSrcPt.X() );
+ tools::Long nY = ImplLogicYToDevicePixel( rSrcPt.Y() );
+ tools::Long nWidth = ImplLogicWidthToDevicePixel( rSize.Width() );
+ tools::Long nHeight = ImplLogicHeightToDevicePixel( rSize.Height() );
+ if ( nWidth <= 0 || nHeight <= 0 || nX > (mnOutWidth + mnOutOffX) || nY > (mnOutHeight + mnOutOffY))
+ return Bitmap();
+
+ Bitmap aBmp;
+ tools::Rectangle aRect( Point( nX, nY ), Size( nWidth, nHeight ) );
+ bool bClipped = false;
+
+ // X-Coordinate outside of draw area?
+ if ( nX < mnOutOffX )
+ {
+ nWidth -= ( mnOutOffX - nX );
+ nX = mnOutOffX;
+ bClipped = true;
+ }
+
+ // Y-Coordinate outside of draw area?
+ if ( nY < mnOutOffY )
+ {
+ nHeight -= ( mnOutOffY - nY );
+ nY = mnOutOffY;
+ bClipped = true;
+ }
+
+ // Width outside of draw area?
+ if ( (nWidth + nX) > (mnOutWidth + mnOutOffX) )
+ {
+ nWidth = mnOutOffX + mnOutWidth - nX;
+ bClipped = true;
+ }
+
+ // Height outside of draw area?
+ if ( (nHeight + nY) > (mnOutHeight + mnOutOffY) )
+ {
+ nHeight = mnOutOffY + mnOutHeight - nY;
+ bClipped = true;
+ }
+
+ if ( bClipped )
+ {
+ // If the visible part has been clipped, we have to create a
+ // Bitmap with the correct size in which we copy the clipped
+ // Bitmap to the correct position.
+ ScopedVclPtrInstance< VirtualDevice > aVDev( *this );
+
+ if ( aVDev->SetOutputSizePixel( aRect.GetSize() ) )
+ {
+ if ( aVDev->mpGraphics || aVDev->AcquireGraphics() )
+ {
+ if ( (nWidth > 0) && (nHeight > 0) )
+ {
+ SalTwoRect aPosAry(nX, nY, nWidth, nHeight,
+ (aRect.Left() < mnOutOffX) ? (mnOutOffX - aRect.Left()) : 0L,
+ (aRect.Top() < mnOutOffY) ? (mnOutOffY - aRect.Top()) : 0L,
+ nWidth, nHeight);
+ aVDev->mpGraphics->CopyBits(aPosAry, *mpGraphics, *this, *this);
+ }
+ else
+ {
+ OSL_ENSURE(false, "CopyBits with zero or negative width or height");
+ }
+
+ aBmp = aVDev->GetBitmap( Point(), aVDev->GetOutputSizePixel() );
+ }
+ else
+ bClipped = false;
+ }
+ else
+ bClipped = false;
+ }
+
+ if ( !bClipped )
+ {
+ std::shared_ptr<SalBitmap> pSalBmp = mpGraphics->GetBitmap( nX, nY, nWidth, nHeight, *this );
+
+ if( pSalBmp )
+ {
+ aBmp.ImplSetSalBitmap(pSalBmp);
+ }
+ }
+
+ return aBmp;
+}
+
+void OutputDevice::DrawDeviceAlphaBitmap( const Bitmap& rBmp, const AlphaMask& rAlpha,
+ const Point& rDestPt, const Size& rDestSize,
+ const Point& rSrcPtPixel, const Size& rSrcSizePixel )
+{
+ assert(!is_double_buffered_window());
+
+ Point aOutPt(LogicToPixel(rDestPt));
+ Size aOutSz(LogicToPixel(rDestSize));
+ tools::Rectangle aDstRect(Point(), GetOutputSizePixel());
+
+ const bool bHMirr = aOutSz.Width() < 0;
+ const bool bVMirr = aOutSz.Height() < 0;
+
+ ClipToPaintRegion(aDstRect);
+
+ BmpMirrorFlags mirrorFlags = BmpMirrorFlags::NONE;
+ if (bHMirr)
+ {
+ aOutSz.setWidth( -aOutSz.Width() );
+ aOutPt.AdjustX( -(aOutSz.Width() - 1) );
+ mirrorFlags |= BmpMirrorFlags::Horizontal;
+ }
+
+ if (bVMirr)
+ {
+ aOutSz.setHeight( -aOutSz.Height() );
+ aOutPt.AdjustY( -(aOutSz.Height() - 1) );
+ mirrorFlags |= BmpMirrorFlags::Vertical;
+ }
+
+ if (aDstRect.Intersection(tools::Rectangle(aOutPt, aOutSz)).IsEmpty())
+ return;
+
+ {
+ Point aRelPt = aOutPt + Point(mnOutOffX, mnOutOffY);
+ SalTwoRect aTR(
+ rSrcPtPixel.X(), rSrcPtPixel.Y(),
+ rSrcSizePixel.Width(), rSrcSizePixel.Height(),
+ aRelPt.X(), aRelPt.Y(),
+ aOutSz.Width(), aOutSz.Height());
+
+ Bitmap bitmap(rBmp);
+ AlphaMask alpha(rAlpha);
+ if(bHMirr || bVMirr)
+ {
+ bitmap.Mirror(mirrorFlags);
+ alpha.Mirror(mirrorFlags);
+ }
+ SalBitmap* pSalSrcBmp = bitmap.ImplGetSalBitmap().get();
+ SalBitmap* pSalAlphaBmp = alpha.GetBitmap().ImplGetSalBitmap().get();
+
+ // #i83087# Naturally, system alpha blending (SalGraphics::DrawAlphaBitmap) cannot work
+ // with separate alpha VDev
+
+ // try to blend the alpha bitmap with the alpha virtual device
+ if (mpAlphaVDev)
+ {
+ if (ImplLogicToDevicePixel(aOutSz).IsEmpty()) // nothing to draw
+ return;
+ Bitmap aAlphaBitmap( mpAlphaVDev->GetBitmap( aRelPt, aOutSz ) );
+ if (SalBitmap* pSalAlphaBmp2 = aAlphaBitmap.ImplGetSalBitmap().get())
+ {
+ if (mpGraphics->BlendAlphaBitmap(aTR, *pSalSrcBmp, *pSalAlphaBmp, *pSalAlphaBmp2, *this))
+ {
+ mpAlphaVDev->BlendBitmap(aTR, rAlpha.GetBitmap());
+ return;
+ }
+ }
+ }
+ else
+ {
+ if (mpGraphics->DrawAlphaBitmap(aTR, *pSalSrcBmp, *pSalAlphaBmp, *this))
+ return;
+ }
+
+ // we need to make sure Skia never reaches this slow code path
+ // (but do not fail in no-op cases)
+ assert(!SkiaHelper::isVCLSkiaEnabled() || !SkiaHelper::isAlphaMaskBlendingEnabled()
+ || tools::Rectangle(Point(), rBmp.GetSizePixel())
+ .Intersection(tools::Rectangle(rSrcPtPixel, rSrcSizePixel)).IsEmpty()
+ || mpAlphaVDev->LogicToPixel(mpAlphaVDev->GetOutputSizePixel()).IsEmpty());
+ }
+
+ tools::Rectangle aBmpRect(Point(), rBmp.GetSizePixel());
+ if (aBmpRect.Intersection(tools::Rectangle(rSrcPtPixel, rSrcSizePixel)).IsEmpty())
+ return;
+
+ Point auxOutPt(LogicToPixel(rDestPt));
+ Size auxOutSz(LogicToPixel(rDestSize));
+
+ // HACK: The function is broken with alpha vdev and mirroring, mirror here.
+ Bitmap bitmap(rBmp);
+ AlphaMask alpha(rAlpha);
+ if(mpAlphaVDev && (bHMirr || bVMirr))
+ {
+ bitmap.Mirror(mirrorFlags);
+ alpha.Mirror(mirrorFlags);
+ auxOutPt = aOutPt;
+ auxOutSz = aOutSz;
+ }
+ DrawDeviceAlphaBitmapSlowPath(bitmap, alpha, aDstRect, aBmpRect, auxOutSz, auxOutPt);
+}
+
+namespace
+{
+
+struct LinearScaleContext
+{
+ std::unique_ptr<sal_Int32[]> mpMapX;
+ std::unique_ptr<sal_Int32[]> mpMapY;
+
+ std::unique_ptr<sal_Int32[]> mpMapXOffset;
+ std::unique_ptr<sal_Int32[]> mpMapYOffset;
+
+ LinearScaleContext(tools::Rectangle const & aDstRect, tools::Rectangle const & aBitmapRect,
+ Size const & aOutSize, tools::Long nOffX, tools::Long nOffY)
+
+ : mpMapX(new sal_Int32[aDstRect.GetWidth()])
+ , mpMapY(new sal_Int32[aDstRect.GetHeight()])
+ , mpMapXOffset(new sal_Int32[aDstRect.GetWidth()])
+ , mpMapYOffset(new sal_Int32[aDstRect.GetHeight()])
+ {
+ const tools::Long nSrcWidth = aBitmapRect.GetWidth();
+ const tools::Long nSrcHeight = aBitmapRect.GetHeight();
+
+ generateSimpleMap(
+ nSrcWidth, aDstRect.GetWidth(), aBitmapRect.Left(),
+ aOutSize.Width(), nOffX, mpMapX.get(), mpMapXOffset.get());
+
+ generateSimpleMap(
+ nSrcHeight, aDstRect.GetHeight(), aBitmapRect.Top(),
+ aOutSize.Height(), nOffY, mpMapY.get(), mpMapYOffset.get());
+ }
+
+private:
+
+ static void generateSimpleMap(tools::Long nSrcDimension, tools::Long nDstDimension, tools::Long nDstLocation,
+ tools::Long nOutDimension, tools::Long nOffset, sal_Int32* pMap, sal_Int32* pMapOffset)
+ {
+
+ const double fReverseScale = (std::abs(nOutDimension) > 1) ? (nSrcDimension - 1) / double(std::abs(nOutDimension) - 1) : 0.0;
+
+ tools::Long nSampleRange = std::max(tools::Long(0), nSrcDimension - 2);
+
+ for (tools::Long i = 0; i < nDstDimension; i++)
+ {
+ double fTemp = std::abs((nOffset + i) * fReverseScale);
+
+ pMap[i] = std::clamp(nDstLocation + tools::Long(fTemp), tools::Long(0), nSampleRange);
+ pMapOffset[i] = static_cast<tools::Long>((fTemp - pMap[i]) * 128.0);
+ }
+ }
+
+public:
+ bool blendBitmap(
+ const BitmapWriteAccess* pDestination,
+ const BitmapReadAccess* pSource,
+ const BitmapReadAccess* pSourceAlpha,
+ const tools::Long nDstWidth,
+ const tools::Long nDstHeight)
+ {
+ if (!pSource || !pSourceAlpha || !pDestination)
+ return false;
+
+ ScanlineFormat nSourceFormat = pSource->GetScanlineFormat();
+ ScanlineFormat nDestinationFormat = pDestination->GetScanlineFormat();
+
+ switch (nSourceFormat)
+ {
+ case ScanlineFormat::N24BitTcRgb:
+ case ScanlineFormat::N24BitTcBgr:
+ {
+ if ( (nSourceFormat == ScanlineFormat::N24BitTcBgr && nDestinationFormat == ScanlineFormat::N32BitTcBgra)
+ || (nSourceFormat == ScanlineFormat::N24BitTcRgb && nDestinationFormat == ScanlineFormat::N32BitTcRgba))
+ {
+ blendBitmap24(pDestination, pSource, pSourceAlpha, nDstWidth, nDstHeight);
+ return true;
+ }
+ }
+ break;
+ default: break;
+ }
+ return false;
+ }
+
+ void blendBitmap24(
+ const BitmapWriteAccess* pDestination,
+ const BitmapReadAccess* pSource,
+ const BitmapReadAccess* pSourceAlpha,
+ const tools::Long nDstWidth,
+ const tools::Long nDstHeight)
+ {
+ Scanline pLine0, pLine1;
+ Scanline pLineAlpha0, pLineAlpha1;
+ Scanline pColorSample1, pColorSample2;
+ Scanline pDestScanline;
+
+ tools::Long nColor1Line1, nColor2Line1, nColor3Line1;
+ tools::Long nColor1Line2, nColor2Line2, nColor3Line2;
+ tools::Long nAlphaLine1, nAlphaLine2;
+
+ sal_uInt8 nColor1, nColor2, nColor3, nAlpha;
+
+ for (tools::Long nY = 0; nY < nDstHeight; nY++)
+ {
+ const tools::Long nMapY = mpMapY[nY];
+ const tools::Long nMapFY = mpMapYOffset[nY];
+
+ pLine0 = pSource->GetScanline(nMapY);
+ // tdf#95481 guard nMapY + 1 to be within bounds
+ pLine1 = (nMapY + 1 < pSource->Height()) ? pSource->GetScanline(nMapY + 1) : pLine0;
+
+ pLineAlpha0 = pSourceAlpha->GetScanline(nMapY);
+ // tdf#95481 guard nMapY + 1 to be within bounds
+ pLineAlpha1 = (nMapY + 1 < pSourceAlpha->Height()) ? pSourceAlpha->GetScanline(nMapY + 1) : pLineAlpha0;
+
+ pDestScanline = pDestination->GetScanline(nY);
+
+ for (tools::Long nX = 0; nX < nDstWidth; nX++)
+ {
+ const tools::Long nMapX = mpMapX[nX];
+ const tools::Long nMapFX = mpMapXOffset[nX];
+
+ pColorSample1 = pLine0 + 3 * nMapX;
+ pColorSample2 = (nMapX + 1 < pSource->Width()) ? pColorSample1 + 3 : pColorSample1;
+ nColor1Line1 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1++;
+ pColorSample2++;
+ nColor2Line1 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1++;
+ pColorSample2++;
+ nColor3Line1 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1 = pLine1 + 3 * nMapX;
+ pColorSample2 = (nMapX + 1 < pSource->Width()) ? pColorSample1 + 3 : pColorSample1;
+ nColor1Line2 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1++;
+ pColorSample2++;
+ nColor2Line2 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1++;
+ pColorSample2++;
+ nColor3Line2 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1 = pLineAlpha0 + nMapX;
+ pColorSample2 = (nMapX + 1 < pSourceAlpha->Width()) ? pColorSample1 + 1 : pColorSample1;
+ nAlphaLine1 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ pColorSample1 = pLineAlpha1 + nMapX;
+ pColorSample2 = (nMapX + 1 < pSourceAlpha->Width()) ? pColorSample1 + 1 : pColorSample1;
+ nAlphaLine2 = (static_cast<tools::Long>(*pColorSample1) << 7) + nMapFX * (static_cast<tools::Long>(*pColorSample2) - *pColorSample1);
+
+ nColor1 = (nColor1Line1 + nMapFY * ((nColor1Line2 >> 7) - (nColor1Line1 >> 7))) >> 7;
+ nColor2 = (nColor2Line1 + nMapFY * ((nColor2Line2 >> 7) - (nColor2Line1 >> 7))) >> 7;
+ nColor3 = (nColor3Line1 + nMapFY * ((nColor3Line2 >> 7) - (nColor3Line1 >> 7))) >> 7;
+
+ nAlpha = (nAlphaLine1 + nMapFY * ((nAlphaLine2 >> 7) - (nAlphaLine1 >> 7))) >> 7;
+
+ *pDestScanline = color::ColorChannelMerge(*pDestScanline, nColor1, nAlpha);
+ pDestScanline++;
+ *pDestScanline = color::ColorChannelMerge(*pDestScanline, nColor2, nAlpha);
+ pDestScanline++;
+ *pDestScanline = color::ColorChannelMerge(*pDestScanline, nColor3, nAlpha);
+ pDestScanline++;
+ pDestScanline++;
+ }
+ }
+ }
+};
+
+struct TradScaleContext
+{
+ std::unique_ptr<sal_Int32[]> mpMapX;
+ std::unique_ptr<sal_Int32[]> mpMapY;
+
+ TradScaleContext(tools::Rectangle const & aDstRect, tools::Rectangle const & aBitmapRect,
+ Size const & aOutSize, tools::Long nOffX, tools::Long nOffY)
+
+ : mpMapX(new sal_Int32[aDstRect.GetWidth()])
+ , mpMapY(new sal_Int32[aDstRect.GetHeight()])
+ {
+ const tools::Long nSrcWidth = aBitmapRect.GetWidth();
+ const tools::Long nSrcHeight = aBitmapRect.GetHeight();
+
+ const bool bHMirr = aOutSize.Width() < 0;
+ const bool bVMirr = aOutSize.Height() < 0;
+
+ generateSimpleMap(
+ nSrcWidth, aDstRect.GetWidth(), aBitmapRect.Left(),
+ aOutSize.Width(), nOffX, bHMirr, mpMapX.get());
+
+ generateSimpleMap(
+ nSrcHeight, aDstRect.GetHeight(), aBitmapRect.Top(),
+ aOutSize.Height(), nOffY, bVMirr, mpMapY.get());
+ }
+
+private:
+
+ static void generateSimpleMap(tools::Long nSrcDimension, tools::Long nDstDimension, tools::Long nDstLocation,
+ tools::Long nOutDimension, tools::Long nOffset, bool bMirror, sal_Int32* pMap)
+ {
+ tools::Long nMirrorOffset = 0;
+
+ if (bMirror)
+ nMirrorOffset = (nDstLocation << 1) + nSrcDimension - 1;
+
+ for (tools::Long i = 0; i < nDstDimension; ++i, ++nOffset)
+ {
+ pMap[i] = nDstLocation + nOffset * nSrcDimension / nOutDimension;
+ if (bMirror)
+ pMap[i] = nMirrorOffset - pMap[i];
+ }
+ }
+};
+
+
+} // end anonymous namespace
+
+void OutputDevice::DrawDeviceAlphaBitmapSlowPath(const Bitmap& rBitmap,
+ const AlphaMask& rAlpha, tools::Rectangle aDstRect, tools::Rectangle aBmpRect, Size const & aOutSize, Point const & aOutPoint)
+{
+ assert(!is_double_buffered_window());
+
+ VirtualDevice* pOldVDev = mpAlphaVDev;
+
+ const bool bHMirr = aOutSize.Width() < 0;
+ const bool bVMirr = aOutSize.Height() < 0;
+
+ // The scaling in this code path produces really ugly results - it
+ // does the most trivial scaling with no smoothing.
+ GDIMetaFile* pOldMetaFile = mpMetaFile;
+ const bool bOldMap = mbMap;
+
+ mpMetaFile = nullptr; // fdo#55044 reset before GetBitmap!
+ mbMap = false;
+
+ Bitmap aBmp(GetBitmap(aDstRect.TopLeft(), aDstRect.GetSize()));
+
+ // #109044# The generated bitmap need not necessarily be
+ // of aDstRect dimensions, it's internally clipped to
+ // window bounds. Thus, we correct the dest size here,
+ // since we later use it (in nDstWidth/Height) for pixel
+ // access)
+ // #i38887# reading from screen may sometimes fail
+ if (aBmp.ImplGetSalBitmap())
+ {
+ aDstRect.SetSize(aBmp.GetSizePixel());
+ }
+
+ const tools::Long nDstWidth = aDstRect.GetWidth();
+ const tools::Long nDstHeight = aDstRect.GetHeight();
+
+ // calculate offset in original bitmap
+ // in RTL case this is a little more complicated since the contents of the
+ // bitmap is not mirrored (it never is), however the paint region and bmp region
+ // are in mirrored coordinates, so the intersection of (aOutPt,aOutSz) with these
+ // is content wise somewhere else and needs to take mirroring into account
+ const tools::Long nOffX = IsRTLEnabled()
+ ? aOutSize.Width() - aDstRect.GetWidth() - (aDstRect.Left() - aOutPoint.X())
+ : aDstRect.Left() - aOutPoint.X();
+
+ const tools::Long nOffY = aDstRect.Top() - aOutPoint.Y();
+
+ TradScaleContext aTradContext(aDstRect, aBmpRect, aOutSize, nOffX, nOffY);
+
+ BitmapScopedReadAccess pBitmapReadAccess(rBitmap);
+ BitmapScopedReadAccess pAlphaReadAccess(rAlpha);
+
+ SAL_WARN_IF(pAlphaReadAccess->GetScanlineFormat() != ScanlineFormat::N8BitPal, "vcl.gdi", "non-8bit alpha no longer supported!");
+ assert(pAlphaReadAccess->GetScanlineFormat() == ScanlineFormat::N8BitPal);
+
+ // #i38887# reading from screen may sometimes fail
+ if (aBmp.ImplGetSalBitmap())
+ {
+ Bitmap aNewBitmap;
+
+ if (mpAlphaVDev)
+ {
+ aNewBitmap = BlendBitmapWithAlpha(
+ aBmp, pBitmapReadAccess.get(), pAlphaReadAccess.get(),
+ aDstRect,
+ nOffY, nDstHeight,
+ nOffX, nDstWidth,
+ aTradContext.mpMapX.get(), aTradContext.mpMapY.get() );
+ }
+ else
+ {
+ LinearScaleContext aLinearContext(aDstRect, aBmpRect, aOutSize, nOffX, nOffY);
+
+ if (aLinearContext.blendBitmap( BitmapScopedWriteAccess(aBmp).get(), pBitmapReadAccess.get(), pAlphaReadAccess.get(),
+ nDstWidth, nDstHeight))
+ {
+ aNewBitmap = aBmp;
+ }
+ else
+ {
+ aNewBitmap = BlendBitmap(
+ aBmp, pBitmapReadAccess.get(), pAlphaReadAccess.get(),
+ nOffY, nDstHeight,
+ nOffX, nDstWidth,
+ aBmpRect, aOutSize,
+ bHMirr, bVMirr,
+ aTradContext.mpMapX.get(), aTradContext.mpMapY.get() );
+ }
+ }
+
+ // #110958# Disable alpha VDev, we're doing the necessary
+ // stuff explicitly further below
+ if (mpAlphaVDev)
+ mpAlphaVDev = nullptr;
+
+ DrawBitmap(aDstRect.TopLeft(), aNewBitmap);
+
+ // #110958# Enable alpha VDev again
+ mpAlphaVDev = pOldVDev;
+ }
+
+ mbMap = bOldMap;
+ mpMetaFile = pOldMetaFile;
+}
+
+bool OutputDevice::HasFastDrawTransformedBitmap() const
+{
+ if( ImplIsRecordLayout() )
+ return false;
+
+ if (!mpGraphics && !AcquireGraphics())
+ return false;
+ assert(mpGraphics);
+
+ return mpGraphics->HasFastDrawTransformedBitmap();
+}
+
+void OutputDevice::DrawImage( const Point& rPos, const Image& rImage, DrawImageFlags nStyle )
+{
+ assert(!is_double_buffered_window());
+
+ DrawImage( rPos, Size(), rImage, nStyle );
+}
+
+void OutputDevice::DrawImage( const Point& rPos, const Size& rSize,
+ const Image& rImage, DrawImageFlags nStyle )
+{
+ assert(!is_double_buffered_window());
+
+ bool bIsSizeValid = !rSize.IsEmpty();
+
+ if (!ImplIsRecordLayout())
+ {
+ Image& rNonConstImage = const_cast<Image&>(rImage);
+ if (bIsSizeValid)
+ rNonConstImage.Draw(this, rPos, nStyle, &rSize);
+ else
+ rNonConstImage.Draw(this, rPos, nStyle);
+ }
+}
+
+namespace
+{
+ // Co = Cs + Cd*(1-As) premultiplied alpha -or-
+ // Co = (AsCs + AdCd*(1-As)) / Ao
+ sal_uInt8 CalcColor( const sal_uInt8 nSourceColor, const sal_uInt8 nSourceAlpha,
+ const sal_uInt8 nDstAlpha, const sal_uInt8 nResAlpha, const sal_uInt8 nDestColor )
+ {
+ int c = nResAlpha ? ( static_cast<int>(nSourceAlpha)*nSourceColor + static_cast<int>(nDstAlpha)*nDestColor -
+ static_cast<int>(nDstAlpha)*nDestColor*nSourceAlpha/255 ) / static_cast<int>(nResAlpha) : 0;
+ return sal_uInt8( c );
+ }
+
+ BitmapColor AlphaBlend( int nX, int nY,
+ const tools::Long nMapX,
+ const tools::Long nMapY,
+ BitmapReadAccess const * pP,
+ BitmapReadAccess const * pA,
+ BitmapReadAccess const * pB,
+ BitmapWriteAccess const * pAlphaW,
+ sal_uInt8& nResAlpha )
+ {
+ BitmapColor aDstCol,aSrcCol;
+ aSrcCol = pP->GetColor( nMapY, nMapX );
+ aDstCol = pB->GetColor( nY, nX );
+
+ const sal_uInt8 nSrcAlpha = pA->GetPixelIndex( nMapY, nMapX );
+ const sal_uInt8 nDstAlpha = pAlphaW->GetPixelIndex( nY, nX );
+
+ // Perform porter-duff compositing 'over' operation
+
+ // Co = Cs + Cd*(1-As)
+ // Ad = As + Ad*(1-As)
+ nResAlpha = static_cast<int>(nSrcAlpha) + static_cast<int>(nDstAlpha) - static_cast<int>(nDstAlpha)*nSrcAlpha/255;
+
+ aDstCol.SetRed( CalcColor( aSrcCol.GetRed(), nSrcAlpha, nDstAlpha, nResAlpha, aDstCol.GetRed() ) );
+ aDstCol.SetBlue( CalcColor( aSrcCol.GetBlue(), nSrcAlpha, nDstAlpha, nResAlpha, aDstCol.GetBlue() ) );
+ aDstCol.SetGreen( CalcColor( aSrcCol.GetGreen(), nSrcAlpha, nDstAlpha, nResAlpha, aDstCol.GetGreen() ) );
+
+ return aDstCol;
+ }
+}
+
+void OutputDevice::BlendBitmap(
+ const SalTwoRect& rPosAry,
+ const Bitmap& rBmp )
+{
+ mpGraphics->BlendBitmap( rPosAry, *rBmp.ImplGetSalBitmap(), *this );
+}
+
+Bitmap OutputDevice::BlendBitmapWithAlpha(
+ Bitmap& aBmp,
+ BitmapReadAccess const * pP,
+ BitmapReadAccess const * pA,
+ const tools::Rectangle& aDstRect,
+ const sal_Int32 nOffY,
+ const sal_Int32 nDstHeight,
+ const sal_Int32 nOffX,
+ const sal_Int32 nDstWidth,
+ const sal_Int32* pMapX,
+ const sal_Int32* pMapY )
+
+{
+ BitmapColor aDstCol;
+ Bitmap res;
+ int nX, nY;
+ sal_uInt8 nResAlpha;
+
+ SAL_WARN_IF( !mpAlphaVDev, "vcl.gdi", "BlendBitmapWithAlpha(): call me only with valid alpha VirtualDevice!" );
+
+ bool bOldMapMode( mpAlphaVDev->IsMapModeEnabled() );
+ mpAlphaVDev->EnableMapMode(false);
+
+ Bitmap aAlphaBitmap( mpAlphaVDev->GetBitmap( aDstRect.TopLeft(), aDstRect.GetSize() ) );
+ BitmapScopedWriteAccess pAlphaW(aAlphaBitmap);
+
+ if( GetBitCount() <= 8 )
+ {
+ Bitmap aDither(aBmp.GetSizePixel(), vcl::PixelFormat::N8_BPP);
+ BitmapColor aIndex( 0 );
+ BitmapScopedReadAccess pB(aBmp);
+ BitmapScopedWriteAccess pW(aDither);
+
+ if (pB && pP && pA && pW && pAlphaW)
+ {
+ int nOutY;
+
+ for( nY = 0, nOutY = nOffY; nY < nDstHeight; nY++, nOutY++ )
+ {
+ const tools::Long nMapY = pMapY[ nY ];
+ const tools::Long nModY = ( nOutY & 0x0FL ) << 4;
+ int nOutX;
+
+ Scanline pScanline = pW->GetScanline(nY);
+ Scanline pScanlineAlpha = pAlphaW->GetScanline(nY);
+ for( nX = 0, nOutX = nOffX; nX < nDstWidth; nX++, nOutX++ )
+ {
+ const tools::Long nMapX = pMapX[ nX ];
+ const sal_uLong nD = nVCLDitherLut[ nModY | ( nOutX & 0x0FL ) ];
+
+ aDstCol = AlphaBlend( nX, nY, nMapX, nMapY, pP, pA, pB.get(), pAlphaW.get(), nResAlpha );
+
+ aIndex.SetIndex( static_cast<sal_uInt8>( nVCLRLut[ ( nVCLLut[ aDstCol.GetRed() ] + nD ) >> 16 ] +
+ nVCLGLut[ ( nVCLLut[ aDstCol.GetGreen() ] + nD ) >> 16 ] +
+ nVCLBLut[ ( nVCLLut[ aDstCol.GetBlue() ] + nD ) >> 16 ] ) );
+ pW->SetPixelOnData( pScanline, nX, aIndex );
+
+ aIndex.SetIndex( static_cast<sal_uInt8>( nVCLRLut[ ( nVCLLut[ nResAlpha ] + nD ) >> 16 ] +
+ nVCLGLut[ ( nVCLLut[ nResAlpha ] + nD ) >> 16 ] +
+ nVCLBLut[ ( nVCLLut[ nResAlpha ] + nD ) >> 16 ] ) );
+ pAlphaW->SetPixelOnData( pScanlineAlpha, nX, aIndex );
+ }
+ }
+ }
+ pB.reset();
+ pW.reset();
+ res = aDither;
+ }
+ else
+ {
+ BitmapScopedWriteAccess pB(aBmp);
+ if (pB && pP && pA && pAlphaW)
+ {
+ for( nY = 0; nY < nDstHeight; nY++ )
+ {
+ const tools::Long nMapY = pMapY[ nY ];
+ Scanline pScanlineB = pB->GetScanline(nY);
+ Scanline pScanlineAlpha = pAlphaW->GetScanline(nY);
+
+ for( nX = 0; nX < nDstWidth; nX++ )
+ {
+ const tools::Long nMapX = pMapX[ nX ];
+ aDstCol = AlphaBlend( nX, nY, nMapX, nMapY, pP, pA, pB.get(), pAlphaW.get(), nResAlpha );
+
+ pB->SetPixelOnData(pScanlineB, nX, pB->GetBestMatchingColor(aDstCol));
+ pAlphaW->SetPixelOnData(pScanlineAlpha, nX, pB->GetBestMatchingColor(Color(nResAlpha, nResAlpha, nResAlpha)));
+ }
+ }
+ }
+ pB.reset();
+ res = aBmp;
+ }
+
+ pAlphaW.reset();
+ mpAlphaVDev->DrawBitmap( aDstRect.TopLeft(), aAlphaBitmap );
+ mpAlphaVDev->EnableMapMode( bOldMapMode );
+
+ return res;
+}
+
+Bitmap OutputDevice::BlendBitmap(
+ Bitmap& aBmp,
+ BitmapReadAccess const * pP,
+ BitmapReadAccess const * pA,
+ const sal_Int32 nOffY,
+ const sal_Int32 nDstHeight,
+ const sal_Int32 nOffX,
+ const sal_Int32 nDstWidth,
+ const tools::Rectangle& aBmpRect,
+ const Size& aOutSz,
+ const bool bHMirr,
+ const bool bVMirr,
+ const sal_Int32* pMapX,
+ const sal_Int32* pMapY )
+{
+ if( !pP || !pA )
+ return aBmp;
+
+ if( GetBitCount() <= 8 )
+ {
+ Bitmap aDither(aBmp.GetSizePixel(), vcl::PixelFormat::N8_BPP);
+ BitmapColor aIndex( 0 );
+ BitmapScopedReadAccess pB(aBmp);
+ BitmapScopedWriteAccess pW(aDither);
+
+ for( int nY = 0, nOutY = nOffY; nY < nDstHeight; nY++, nOutY++ )
+ {
+ tools::Long nMapY = pMapY[ nY ];
+ if (bVMirr)
+ {
+ nMapY = aBmpRect.Bottom() - nMapY;
+ }
+ const tools::Long nModY = ( nOutY & 0x0FL ) << 4;
+
+ Scanline pScanline = pW->GetScanline(nY);
+ Scanline pScanlineAlpha = pA->GetScanline(nMapY);
+ for( int nX = 0, nOutX = nOffX; nX < nDstWidth; nX++, nOutX++ )
+ {
+ tools::Long nMapX = pMapX[ nX ];
+ if (bHMirr)
+ {
+ nMapX = aBmpRect.Right() - nMapX;
+ }
+ const sal_uLong nD = nVCLDitherLut[ nModY | ( nOutX & 0x0FL ) ];
+
+ BitmapColor aDstCol = pB->GetColor( nY, nX );
+ aDstCol.Merge( pP->GetColor( nMapY, nMapX ), 255 - pA->GetIndexFromData( pScanlineAlpha, nMapX ) );
+ aIndex.SetIndex( static_cast<sal_uInt8>( nVCLRLut[ ( nVCLLut[ aDstCol.GetRed() ] + nD ) >> 16 ] +
+ nVCLGLut[ ( nVCLLut[ aDstCol.GetGreen() ] + nD ) >> 16 ] +
+ nVCLBLut[ ( nVCLLut[ aDstCol.GetBlue() ] + nD ) >> 16 ] ) );
+ pW->SetPixelOnData( pScanline, nX, aIndex );
+ }
+ }
+
+ pB.reset();
+ pW.reset();
+ return aDither;
+ }
+
+ BitmapScopedWriteAccess pB(aBmp);
+
+ bool bFastBlend = false;
+ if (!bHMirr && !bVMirr)
+ {
+ SalTwoRect aTR(aBmpRect.Left(), aBmpRect.Top(), aBmpRect.GetWidth(), aBmpRect.GetHeight(),
+ nOffX, nOffY, aOutSz.Width(), aOutSz.Height());
+
+ bFastBlend = ImplFastBitmapBlending(*pB, *pP, *pA, aTR);
+ }
+
+ if (!bFastBlend)
+ {
+ for (int nY = 0; nY < nDstHeight; nY++)
+ {
+ tools::Long nMapY = pMapY[nY];
+
+ if (bVMirr)
+ nMapY = aBmpRect.Bottom() - nMapY;
+
+ Scanline pAScan = pA->GetScanline(nMapY);
+ Scanline pBScan = pB->GetScanline(nY);
+ for(int nX = 0; nX < nDstWidth; nX++)
+ {
+ tools::Long nMapX = pMapX[nX];
+
+ if (bHMirr)
+ nMapX = aBmpRect.Right() - nMapX;
+
+ BitmapColor aDstCol = pB->GetPixelFromData(pBScan, nX);
+ aDstCol.Merge(pP->GetColor(nMapY, nMapX), pAScan[nMapX]);
+ pB->SetPixelOnData(pBScan, nX, aDstCol);
+ }
+ }
+ }
+
+ pB.reset();
+ return aBmp;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */