/* -*- 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 #include #include #include #include #include #include #include #include #include #include #include #include "pdfwriter_impl.hxx" #define MAX_TILE_WIDTH 1024 #define MAX_TILE_HEIGHT 1024 typedef ::std::pair< MetaAction*, int > Component; // MetaAction plus index in metafile namespace { // List of (intersecting) actions, plus overall bounds struct ConnectedComponents { ConnectedComponents() : aComponentList(), aBounds(), aBgColor(COL_WHITE), bIsSpecial(false), bIsFullyTransparent(false) {} ::std::list< Component > aComponentList; tools::Rectangle aBounds; Color aBgColor; bool bIsSpecial; bool bIsFullyTransparent; }; } namespace { /** Determines whether the action can handle transparency correctly (i.e. when painted on white background, does the action still look correct)? */ bool DoesActionHandleTransparency( const MetaAction& rAct ) { // MetaActionType::FLOATTRANSPARENT can contain a whole metafile, // which is to be rendered with the given transparent gradient. We // currently cannot emulate transparent painting on a white // background reliably. // the remainder can handle printing itself correctly on a uniform // white background. switch( rAct.GetType() ) { case MetaActionType::Transparent: case MetaActionType::BMPEX: case MetaActionType::BMPEXSCALE: case MetaActionType::BMPEXSCALEPART: return true; default: return false; } } bool doesRectCoverWithUniformColor( tools::Rectangle const & rPrevRect, tools::Rectangle const & rCurrRect, OutputDevice const & rMapModeVDev) { // shape needs to fully cover previous content, and have uniform // color return (rMapModeVDev.LogicToPixel(rCurrRect).IsInside(rPrevRect) && rMapModeVDev.IsFillColor()); } /** Check whether rCurrRect rectangle fully covers io_rPrevRect - if yes, return true and update o_rBgColor */ bool checkRect( tools::Rectangle& io_rPrevRect, Color& o_rBgColor, const tools::Rectangle& rCurrRect, OutputDevice const & rMapModeVDev ) { bool bRet = doesRectCoverWithUniformColor(io_rPrevRect, rCurrRect, rMapModeVDev); if( bRet ) { io_rPrevRect = rCurrRect; o_rBgColor = rMapModeVDev.GetFillColor(); } return bRet; } /** #107169# Convert BitmapEx to Bitmap with appropriately blended color. Convert MetaTransparentAction to plain polygon, appropriately colored @param o_rMtf Add converted actions to this metafile */ void ImplConvertTransparentAction( GDIMetaFile& o_rMtf, const MetaAction& rAct, const OutputDevice& rStateOutDev, Color aBgColor ) { if (rAct.GetType() == MetaActionType::Transparent) { const MetaTransparentAction* pTransAct = static_cast(&rAct); sal_uInt16 nTransparency( pTransAct->GetTransparence() ); // #i10613# Respect transparency for draw color if (nTransparency) { o_rMtf.AddAction(new MetaPushAction(PushFlags::LINECOLOR|PushFlags::FILLCOLOR)); // assume white background for alpha blending Color aLineColor(rStateOutDev.GetLineColor()); aLineColor.SetRed(static_cast((255*nTransparency + (100 - nTransparency) * aLineColor.GetRed()) / 100)); aLineColor.SetGreen(static_cast((255*nTransparency + (100 - nTransparency) * aLineColor.GetGreen()) / 100)); aLineColor.SetBlue(static_cast((255*nTransparency + (100 - nTransparency) * aLineColor.GetBlue()) / 100)); o_rMtf.AddAction(new MetaLineColorAction(aLineColor, true)); Color aFillColor(rStateOutDev.GetFillColor()); aFillColor.SetRed(static_cast((255*nTransparency + (100 - nTransparency)*aFillColor.GetRed()) / 100)); aFillColor.SetGreen(static_cast((255*nTransparency + (100 - nTransparency)*aFillColor.GetGreen()) / 100)); aFillColor.SetBlue(static_cast((255*nTransparency + (100 - nTransparency)*aFillColor.GetBlue()) / 100)); o_rMtf.AddAction(new MetaFillColorAction(aFillColor, true)); } o_rMtf.AddAction(new MetaPolyPolygonAction(pTransAct->GetPolyPolygon())); if(nTransparency) o_rMtf.AddAction(new MetaPopAction()); } else { BitmapEx aBmpEx; switch (rAct.GetType()) { case MetaActionType::BMPEX: aBmpEx = static_cast(rAct).GetBitmapEx(); break; case MetaActionType::BMPEXSCALE: aBmpEx = static_cast(rAct).GetBitmapEx(); break; case MetaActionType::BMPEXSCALEPART: aBmpEx = static_cast(rAct).GetBitmapEx(); break; case MetaActionType::Transparent: default: OSL_FAIL("Printer::GetPreparedMetafile impossible state reached"); break; } Bitmap aBmp(aBmpEx.GetBitmap()); if (!aBmpEx.IsAlpha()) { // blend with mask Bitmap::ScopedReadAccess pRA(aBmp); if (!pRA) return; // what else should I do? Color aActualColor(aBgColor); if (pRA->HasPalette()) aActualColor = pRA->GetBestPaletteColor(aBgColor); pRA.reset(); // did we get true white? if (aActualColor.GetColorError(aBgColor)) { // no, create truecolor bitmap, then aBmp.Convert(BmpConversion::N24Bit); // fill masked out areas white aBmp.Replace(aBmpEx.GetMask(), aBgColor); } else { // fill masked out areas white aBmp.Replace(aBmpEx.GetMask(), aActualColor); } } else { // blend with alpha channel aBmp.Convert(BmpConversion::N24Bit); aBmp.Blend(aBmpEx.GetAlpha(), aBgColor); } // add corresponding action switch (rAct.GetType()) { case MetaActionType::BMPEX: o_rMtf.AddAction(new MetaBmpAction( static_cast(rAct).GetPoint(), aBmp)); break; case MetaActionType::BMPEXSCALE: o_rMtf.AddAction(new MetaBmpScaleAction( static_cast(rAct).GetPoint(), static_cast(rAct).GetSize(), aBmp)); break; case MetaActionType::BMPEXSCALEPART: o_rMtf.AddAction(new MetaBmpScalePartAction( static_cast(rAct).GetDestPoint(), static_cast(rAct).GetDestSize(), static_cast(rAct).GetSrcPoint(), static_cast(rAct).GetSrcSize(), aBmp)); break; default: OSL_FAIL("Unexpected case"); break; } } } // #i10613# Extracted from ImplCheckRect::ImplCreate // Returns true, if given action creates visible (i.e. non-transparent) output bool ImplIsNotTransparent( const MetaAction& rAct, const OutputDevice& rOut ) { const bool bLineTransparency( !rOut.IsLineColor() || rOut.GetLineColor().GetTransparency() == 255 ); const bool bFillTransparency( !rOut.IsFillColor() || rOut.GetFillColor().GetTransparency() == 255 ); bool bRet( false ); switch( rAct.GetType() ) { case MetaActionType::POINT: if( !bLineTransparency ) bRet = true; break; case MetaActionType::LINE: if( !bLineTransparency ) bRet = true; break; case MetaActionType::RECT: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::ROUNDRECT: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::ELLIPSE: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::ARC: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::PIE: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::CHORD: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::POLYLINE: if( !bLineTransparency ) bRet = true; break; case MetaActionType::POLYGON: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::POLYPOLYGON: if( !bLineTransparency || !bFillTransparency ) bRet = true; break; case MetaActionType::TEXT: { const MetaTextAction& rTextAct = static_cast(rAct); const OUString aString( rTextAct.GetText().copy(rTextAct.GetIndex(), rTextAct.GetLen()) ); if (!aString.isEmpty()) bRet = true; } break; case MetaActionType::TEXTARRAY: { const MetaTextArrayAction& rTextAct = static_cast(rAct); const OUString aString( rTextAct.GetText().copy(rTextAct.GetIndex(), rTextAct.GetLen()) ); if (!aString.isEmpty()) bRet = true; } break; case MetaActionType::PIXEL: case MetaActionType::BMP: case MetaActionType::BMPSCALE: case MetaActionType::BMPSCALEPART: case MetaActionType::BMPEX: case MetaActionType::BMPEXSCALE: case MetaActionType::BMPEXSCALEPART: case MetaActionType::MASK: case MetaActionType::MASKSCALE: case MetaActionType::MASKSCALEPART: case MetaActionType::GRADIENT: case MetaActionType::GRADIENTEX: case MetaActionType::HATCH: case MetaActionType::WALLPAPER: case MetaActionType::Transparent: case MetaActionType::FLOATTRANSPARENT: case MetaActionType::EPS: case MetaActionType::TEXTRECT: case MetaActionType::STRETCHTEXT: case MetaActionType::TEXTLINE: // all other actions: generate non-transparent output bRet = true; break; default: break; } return bRet; } // #i10613# Extracted from ImplCheckRect::ImplCreate tools::Rectangle ImplCalcActionBounds( const MetaAction& rAct, const OutputDevice& rOut ) { tools::Rectangle aActionBounds; switch( rAct.GetType() ) { case MetaActionType::PIXEL: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), Size( 1, 1 ) ); break; case MetaActionType::POINT: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), Size( 1, 1 ) ); break; case MetaActionType::LINE: { const MetaLineAction& rMetaLineAction = static_cast(rAct); aActionBounds = tools::Rectangle( rMetaLineAction.GetStartPoint(), rMetaLineAction.GetEndPoint() ); aActionBounds.Justify(); const long nLineWidth(rMetaLineAction.GetLineInfo().GetWidth()); if(nLineWidth) { const long nHalfLineWidth((nLineWidth + 1) / 2); aActionBounds.AdjustLeft( -nHalfLineWidth ); aActionBounds.AdjustTop( -nHalfLineWidth ); aActionBounds.AdjustRight(nHalfLineWidth ); aActionBounds.AdjustBottom(nHalfLineWidth ); } break; } case MetaActionType::RECT: aActionBounds = static_cast(rAct).GetRect(); break; case MetaActionType::ROUNDRECT: aActionBounds = tools::Polygon( static_cast(rAct).GetRect(), static_cast(rAct).GetHorzRound(), static_cast(rAct).GetVertRound() ).GetBoundRect(); break; case MetaActionType::ELLIPSE: { const tools::Rectangle& rRect = static_cast(rAct).GetRect(); aActionBounds = tools::Polygon( rRect.Center(), rRect.GetWidth() >> 1, rRect.GetHeight() >> 1 ).GetBoundRect(); break; } case MetaActionType::ARC: aActionBounds = tools::Polygon( static_cast(rAct).GetRect(), static_cast(rAct).GetStartPoint(), static_cast(rAct).GetEndPoint(), PolyStyle::Arc ).GetBoundRect(); break; case MetaActionType::PIE: aActionBounds = tools::Polygon( static_cast(rAct).GetRect(), static_cast(rAct).GetStartPoint(), static_cast(rAct).GetEndPoint(), PolyStyle::Pie ).GetBoundRect(); break; case MetaActionType::CHORD: aActionBounds = tools::Polygon( static_cast(rAct).GetRect(), static_cast(rAct).GetStartPoint(), static_cast(rAct).GetEndPoint(), PolyStyle::Chord ).GetBoundRect(); break; case MetaActionType::POLYLINE: { const MetaPolyLineAction& rMetaPolyLineAction = static_cast(rAct); aActionBounds = rMetaPolyLineAction.GetPolygon().GetBoundRect(); const long nLineWidth(rMetaPolyLineAction.GetLineInfo().GetWidth()); if(nLineWidth) { const long nHalfLineWidth((nLineWidth + 1) / 2); aActionBounds.AdjustLeft( -nHalfLineWidth ); aActionBounds.AdjustTop( -nHalfLineWidth ); aActionBounds.AdjustRight(nHalfLineWidth ); aActionBounds.AdjustBottom(nHalfLineWidth ); } break; } case MetaActionType::POLYGON: aActionBounds = static_cast(rAct).GetPolygon().GetBoundRect(); break; case MetaActionType::POLYPOLYGON: aActionBounds = static_cast(rAct).GetPolyPolygon().GetBoundRect(); break; case MetaActionType::BMP: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), rOut.PixelToLogic( static_cast(rAct).GetBitmap().GetSizePixel() ) ); break; case MetaActionType::BMPSCALE: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), static_cast(rAct).GetSize() ); break; case MetaActionType::BMPSCALEPART: aActionBounds = tools::Rectangle( static_cast(rAct).GetDestPoint(), static_cast(rAct).GetDestSize() ); break; case MetaActionType::BMPEX: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), rOut.PixelToLogic( static_cast(rAct).GetBitmapEx().GetSizePixel() ) ); break; case MetaActionType::BMPEXSCALE: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), static_cast(rAct).GetSize() ); break; case MetaActionType::BMPEXSCALEPART: aActionBounds = tools::Rectangle( static_cast(rAct).GetDestPoint(), static_cast(rAct).GetDestSize() ); break; case MetaActionType::MASK: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), rOut.PixelToLogic( static_cast(rAct).GetBitmap().GetSizePixel() ) ); break; case MetaActionType::MASKSCALE: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), static_cast(rAct).GetSize() ); break; case MetaActionType::MASKSCALEPART: aActionBounds = tools::Rectangle( static_cast(rAct).GetDestPoint(), static_cast(rAct).GetDestSize() ); break; case MetaActionType::GRADIENT: aActionBounds = static_cast(rAct).GetRect(); break; case MetaActionType::GRADIENTEX: aActionBounds = static_cast(rAct).GetPolyPolygon().GetBoundRect(); break; case MetaActionType::HATCH: aActionBounds = static_cast(rAct).GetPolyPolygon().GetBoundRect(); break; case MetaActionType::WALLPAPER: aActionBounds = static_cast(rAct).GetRect(); break; case MetaActionType::Transparent: aActionBounds = static_cast(rAct).GetPolyPolygon().GetBoundRect(); break; case MetaActionType::FLOATTRANSPARENT: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), static_cast(rAct).GetSize() ); break; case MetaActionType::EPS: aActionBounds = tools::Rectangle( static_cast(rAct).GetPoint(), static_cast(rAct).GetSize() ); break; case MetaActionType::TEXT: { const MetaTextAction& rTextAct = static_cast(rAct); const OUString aString( rTextAct.GetText().copy(rTextAct.GetIndex(), rTextAct.GetLen()) ); if (!aString.isEmpty()) { const Point aPtLog( rTextAct.GetPoint() ); // #105987# Use API method instead of Impl* methods // #107490# Set base parameter equal to index parameter rOut.GetTextBoundRect( aActionBounds, rTextAct.GetText(), rTextAct.GetIndex(), rTextAct.GetIndex(), rTextAct.GetLen() ); aActionBounds.Move( aPtLog.X(), aPtLog.Y() ); } } break; case MetaActionType::TEXTARRAY: { const MetaTextArrayAction& rTextAct = static_cast(rAct); const OUString aString( rTextAct.GetText().copy(rTextAct.GetIndex(), rTextAct.GetLen()) ); if( !aString.isEmpty() ) { // #105987# ImplLayout takes everything in logical coordinates std::unique_ptr pSalLayout = rOut.ImplLayout( rTextAct.GetText(), rTextAct.GetIndex(), rTextAct.GetLen(), rTextAct.GetPoint(), 0, rTextAct.GetDXArray() ); if( pSalLayout ) { tools::Rectangle aBoundRect( const_cast(rOut).ImplGetTextBoundRect( *pSalLayout ) ); aActionBounds = rOut.PixelToLogic( aBoundRect ); } } } break; case MetaActionType::TEXTRECT: aActionBounds = static_cast(rAct).GetRect(); break; case MetaActionType::STRETCHTEXT: { const MetaStretchTextAction& rTextAct = static_cast(rAct); const OUString aString( rTextAct.GetText().copy(rTextAct.GetIndex(), rTextAct.GetLen()) ); // #i16195# Literate copy from TextArray action, the // semantics for the ImplLayout call are copied from the // OutDev::DrawStretchText() code. Unfortunately, also in // this case, public outdev methods such as GetTextWidth() // don't provide enough info. if( !aString.isEmpty() ) { // #105987# ImplLayout takes everything in logical coordinates std::unique_ptr pSalLayout = rOut.ImplLayout( rTextAct.GetText(), rTextAct.GetIndex(), rTextAct.GetLen(), rTextAct.GetPoint(), rTextAct.GetWidth() ); if( pSalLayout ) { tools::Rectangle aBoundRect( const_cast(rOut).ImplGetTextBoundRect( *pSalLayout ) ); aActionBounds = rOut.PixelToLogic( aBoundRect ); } } } break; case MetaActionType::TEXTLINE: OSL_FAIL("MetaActionType::TEXTLINE not supported"); break; default: break; } if( !aActionBounds.IsEmpty() ) { // fdo#40421 limit current action's output to clipped area if( rOut.IsClipRegion() ) return rOut.LogicToPixel( rOut.GetClipRegion().GetBoundRect().Intersection( aActionBounds ) ); else return rOut.LogicToPixel( aActionBounds ); } else return tools::Rectangle(); } } // end anon namespace bool OutputDevice::RemoveTransparenciesFromMetaFile( const GDIMetaFile& rInMtf, GDIMetaFile& rOutMtf, long nMaxBmpDPIX, long nMaxBmpDPIY, bool bReduceTransparency, bool bTransparencyAutoMode, bool bDownsampleBitmaps, const Color& rBackground ) { MetaAction* pCurrAct; bool bTransparent( false ); rOutMtf.Clear(); if(!bReduceTransparency || bTransparencyAutoMode) bTransparent = rInMtf.HasTransparentActions(); // #i10613# Determine set of connected components containing transparent objects. These are // then processed as bitmaps, the original actions are removed from the metafile. if( !bTransparent ) { // nothing transparent -> just copy rOutMtf = rInMtf; } else { // #i10613# // This works as follows: we want a number of distinct sets of // connected components, where each set contains metafile // actions that are intersecting (note: there are possibly // more actions contained as are directly intersecting, // because we can only produce rectangular bitmaps later // on. Thus, each set of connected components is the smallest // enclosing, axis-aligned rectangle that completely bounds a // number of intersecting metafile actions, plus any action // that would otherwise be cut in two). Therefore, we // iteratively add metafile actions from the original metafile // to this connected components list (aCCList), by checking // each element's bounding box against intersection with the // metaaction at hand. // All those intersecting elements are removed from aCCList // and collected in a temporary list (aCCMergeList). After all // elements have been checked, the aCCMergeList elements are // merged with the metaaction at hand into one resulting // connected component, with one big bounding box, and // inserted into aCCList again. // The time complexity of this algorithm is O(n^3), where n is // the number of metafile actions, and it finds all distinct // regions of rectangle-bounded connected components. This // algorithm was designed by AF. // STAGE 1: Detect background // Receives uniform background content, and is _not_ merged // nor checked for intersection against other aCCList elements ConnectedComponents aBackgroundComponent; // Read the configuration value of minimal object area where transparency will be removed double fReduceTransparencyMinArea = officecfg::Office::Common::VCL::ReduceTransparencyMinArea::get() / 100.0; SAL_WARN_IF(fReduceTransparencyMinArea > 1.0, "vcl", "Value of ReduceTransparencyMinArea config option is too high"); SAL_WARN_IF(fReduceTransparencyMinArea < 0.0, "vcl", "Value of ReduceTransparencyMinArea config option is too low"); fReduceTransparencyMinArea = std::clamp(fReduceTransparencyMinArea, 0.0, 1.0); // create an OutputDevice to record mapmode changes and the like ScopedVclPtrInstance< VirtualDevice > aMapModeVDev; aMapModeVDev->mnDPIX = mnDPIX; aMapModeVDev->mnDPIY = mnDPIY; aMapModeVDev->EnableOutput(false); int nLastBgAction, nActionNum; // weed out page-filling background objects (if they are // uniformly coloured). Keeping them outside the other // connected components often prevents whole-page bitmap // generation. bool bStillBackground=true; // true until first non-bg action nActionNum=0; nLastBgAction=-1; pCurrAct=const_cast(rInMtf).FirstAction(); if( rBackground != COL_TRANSPARENT ) { aBackgroundComponent.aBgColor = rBackground; aBackgroundComponent.aBounds = GetBackgroundComponentBounds(); } while( pCurrAct && bStillBackground ) { switch( pCurrAct->GetType() ) { case MetaActionType::RECT: { if( !checkRect( aBackgroundComponent.aBounds, aBackgroundComponent.aBgColor, static_cast(pCurrAct)->GetRect(), *aMapModeVDev) ) bStillBackground=false; // incomplete occlusion of background else nLastBgAction=nActionNum; // this _is_ background break; } case MetaActionType::POLYGON: { const tools::Polygon aPoly( static_cast(pCurrAct)->GetPolygon()); if( !basegfx::utils::isRectangle( aPoly.getB2DPolygon()) || !checkRect( aBackgroundComponent.aBounds, aBackgroundComponent.aBgColor, aPoly.GetBoundRect(), *aMapModeVDev) ) bStillBackground=false; // incomplete occlusion of background else nLastBgAction=nActionNum; // this _is_ background break; } case MetaActionType::POLYPOLYGON: { const tools::PolyPolygon aPoly( static_cast(pCurrAct)->GetPolyPolygon()); if( aPoly.Count() != 1 || !basegfx::utils::isRectangle( aPoly[0].getB2DPolygon()) || !checkRect( aBackgroundComponent.aBounds, aBackgroundComponent.aBgColor, aPoly.GetBoundRect(), *aMapModeVDev) ) bStillBackground=false; // incomplete occlusion of background else nLastBgAction=nActionNum; // this _is_ background break; } case MetaActionType::WALLPAPER: { if( !checkRect( aBackgroundComponent.aBounds, aBackgroundComponent.aBgColor, static_cast(pCurrAct)->GetRect(), *aMapModeVDev) ) bStillBackground=false; // incomplete occlusion of background else nLastBgAction=nActionNum; // this _is_ background break; } default: { if( ImplIsNotTransparent( *pCurrAct, *aMapModeVDev ) ) bStillBackground=false; // non-transparent action, possibly // not uniform else // extend current bounds (next uniform action // needs to fully cover this area) aBackgroundComponent.aBounds.Union( ImplCalcActionBounds(*pCurrAct, *aMapModeVDev) ); break; } } // execute action to get correct MapModes etc. pCurrAct->Execute( aMapModeVDev.get() ); pCurrAct=const_cast(rInMtf).NextAction(); ++nActionNum; } aMapModeVDev->ClearStack(); // clean up aMapModeVDev // fast-forward until one after the last background action // (need to reconstruct map mode vdev state) nActionNum=0; pCurrAct=const_cast(rInMtf).FirstAction(); while( pCurrAct && nActionNum<=nLastBgAction ) { // up to and including last ink-generating background // action go to background component aBackgroundComponent.aComponentList.emplace_back( pCurrAct, nActionNum ); // execute action to get correct MapModes etc. pCurrAct->Execute( aMapModeVDev.get() ); pCurrAct=const_cast(rInMtf).NextAction(); ++nActionNum; } // STAGE 2: Generate connected components list ::std::vector aCCList; // contains distinct sets of connected components as elements. // iterate over all actions (start where background action // search left off) for( ; pCurrAct; pCurrAct=const_cast(rInMtf).NextAction(), ++nActionNum ) { // execute action to get correct MapModes etc. pCurrAct->Execute( aMapModeVDev.get() ); // cache bounds of current action const tools::Rectangle aBBCurrAct( ImplCalcActionBounds(*pCurrAct, *aMapModeVDev) ); // accumulate collected bounds here, initialize with current action tools::Rectangle aTotalBounds( aBBCurrAct ); // thus, aTotalComponents.aBounds is empty // for non-output-generating actions bool bTreatSpecial( false ); ConnectedComponents aTotalComponents; // STAGE 2.1: Search for intersecting cc entries // if aBBCurrAct is empty, it will intersect with no // aCCList member. Thus, we can save the check. // Furthermore, this ensures that non-output-generating // actions get their own aCCList entry, which is necessary // when copying them to the output metafile (see stage 4 // below). // #107169# Wholly transparent objects need // not be considered for connected components, // too. Just put each of them into a separate // component. aTotalComponents.bIsFullyTransparent = !ImplIsNotTransparent(*pCurrAct, *aMapModeVDev); if( !aBBCurrAct.IsEmpty() && !aTotalComponents.bIsFullyTransparent ) { if( !aBackgroundComponent.aComponentList.empty() && !aBackgroundComponent.aBounds.IsInside(aTotalBounds) ) { // it seems the background is not large enough. to // be on the safe side, combine with this component. aTotalBounds.Union( aBackgroundComponent.aBounds ); // extract all aCurr actions to aTotalComponents aTotalComponents.aComponentList.splice( aTotalComponents.aComponentList.end(), aBackgroundComponent.aComponentList ); if( aBackgroundComponent.bIsSpecial ) bTreatSpecial = true; } bool bSomeComponentsChanged; // now, this is unfortunate: since changing anyone of // the aCCList elements (e.g. by merging or addition // of an action) might generate new intersection with // other aCCList elements, have to repeat the whole // element scanning, until nothing changes anymore. // Thus, this loop here makes us O(n^3) in the worst // case. do { // only loop here if 'intersects' branch below was hit bSomeComponentsChanged = false; // iterate over all current members of aCCList for( auto aCurrCC=aCCList.begin(); aCurrCC != aCCList.end(); ) { // first check if current element's bounds are // empty. This ensures that empty actions are not // merged into one component, as a matter of fact, // they have no position. // #107169# Wholly transparent objects need // not be considered for connected components, // too. Just put each of them into a separate // component. if( !aCurrCC->aBounds.IsEmpty() && !aCurrCC->bIsFullyTransparent && aCurrCC->aBounds.IsOver( aTotalBounds ) ) { // union the intersecting aCCList element into aTotalComponents // calc union bounding box aTotalBounds.Union( aCurrCC->aBounds ); // extract all aCurr actions to aTotalComponents aTotalComponents.aComponentList.splice( aTotalComponents.aComponentList.end(), aCurrCC->aComponentList ); if( aCurrCC->bIsSpecial ) bTreatSpecial = true; // remove and delete aCurrCC element from list (we've now merged its content) aCurrCC = aCCList.erase( aCurrCC ); // at least one component changed, need to rescan everything bSomeComponentsChanged = true; } else { ++aCurrCC; } } } while( bSomeComponentsChanged ); } // STAGE 2.2: Determine special state for cc element // now test whether the whole connected component must be // treated specially (i.e. rendered as a bitmap): if the // added action is the very first action, or all actions // before it are completely transparent, the connected // component need not be treated specially, not even if // the added action contains transparency. This is because // painting of transparent objects on _white background_ // works without alpha compositing (you just calculate the // color). Note that for the test "all objects before me // are transparent" no sorting is necessary, since the // added metaaction pCurrAct is always in the order the // metafile is painted. Generally, the order of the // metaactions in the ConnectedComponents are not // guaranteed to be the same as in the metafile. if( bTreatSpecial ) { // prev component(s) special -> this one, too aTotalComponents.bIsSpecial = true; } else if(!pCurrAct->IsTransparent()) { // added action and none of prev components special -> // this one normal, too aTotalComponents.bIsSpecial = false; } else { // added action is special and none of prev components // special -> do the detailed tests // can the action handle transparency correctly // (i.e. when painted on white background, does the // action still look correct)? if( !DoesActionHandleTransparency( *pCurrAct ) ) { // no, action cannot handle its transparency on // a printer device, render to bitmap aTotalComponents.bIsSpecial = true; } else { // yes, action can handle its transparency, so // check whether we're on white background if( aTotalComponents.aComponentList.empty() ) { // nothing between pCurrAct and page // background -> don't be special aTotalComponents.bIsSpecial = false; } else { // #107169# Fixes above now ensure that _no_ // object in the list is fully transparent. Thus, // if the component list is not empty above, we // must assume that we have to treat this // component special. // there are non-transparent objects between // pCurrAct and the empty sheet of paper -> be // special, then aTotalComponents.bIsSpecial = true; } } } // STAGE 2.3: Add newly generated CC list element // set new bounds and add action to list aTotalComponents.aBounds = aTotalBounds; aTotalComponents.aComponentList.emplace_back( pCurrAct, nActionNum ); // add aTotalComponents as a new entry to aCCList aCCList.push_back( aTotalComponents ); SAL_WARN_IF( aTotalComponents.aComponentList.empty(), "vcl", "Printer::GetPreparedMetaFile empty component" ); SAL_WARN_IF( aTotalComponents.aBounds.IsEmpty() && (aTotalComponents.aComponentList.size() != 1), "vcl", "Printer::GetPreparedMetaFile non-output generating actions must be solitary"); SAL_WARN_IF( aTotalComponents.bIsFullyTransparent && (aTotalComponents.aComponentList.size() != 1), "vcl", "Printer::GetPreparedMetaFile fully transparent actions must be solitary"); } // well now, we've got the list of disjunct connected // components. Now we've got to create a map, which contains // the corresponding aCCList element for every // metaaction. Later on, we always process the complete // metafile for each bitmap to be generated, but switch on // output only for actions contained in the then current // aCCList element. This ensures correct mapmode and attribute // settings for all cases. // maps mtf actions to CC list entries ::std::vector< const ConnectedComponents* > aCCList_MemberMap( rInMtf.GetActionSize() ); // iterate over all aCCList members and their contained metaactions for (auto const& currentItem : aCCList) { for (auto const& currentAction : currentItem.aComponentList) { // set pointer to aCCList element for corresponding index aCCList_MemberMap[ currentAction.second ] = ¤tItem; } } // STAGE 3.1: Output background mtf actions (if there are any) for (auto & component : aBackgroundComponent.aComponentList) { // simply add this action (above, we inserted the actions // starting at index 0 up to and including nLastBgAction) rOutMtf.AddAction( component.first ); } // STAGE 3.2: Generate banded bitmaps for special regions Point aPageOffset; Size aTmpSize( GetOutputSizePixel() ); if( meOutDevType == OUTDEV_PDF ) { auto pPdfWriter = static_cast(this); aTmpSize = LogicToPixel(pPdfWriter->getCurPageSize(), MapMode(MapUnit::MapPoint)); // also add error code to PDFWriter pPdfWriter->insertError(vcl::PDFWriter::Warning_Transparency_Converted); } else if( meOutDevType == OUTDEV_PRINTER ) { Printer* pThis = dynamic_cast(this); assert(pThis); aPageOffset = pThis->GetPageOffsetPixel(); aPageOffset = Point( 0, 0 ) - aPageOffset; aTmpSize = pThis->GetPaperSizePixel(); } const tools::Rectangle aOutputRect( aPageOffset, aTmpSize ); bool bTiling = dynamic_cast(this) != nullptr; // iterate over all aCCList members and generate bitmaps for the special ones for (auto & currentItem : aCCList) { if( currentItem.bIsSpecial ) { tools::Rectangle aBoundRect( currentItem.aBounds ); aBoundRect.Intersection( aOutputRect ); const double fBmpArea( static_cast(aBoundRect.GetWidth()) * aBoundRect.GetHeight() ); const double fOutArea( static_cast(aOutputRect.GetWidth()) * aOutputRect.GetHeight() ); // check if output doesn't exceed given size if( bReduceTransparency && bTransparencyAutoMode && ( fBmpArea > ( fReduceTransparencyMinArea * fOutArea ) ) ) { // output normally. Therefore, we simply clear the // special attribute, as everything non-special is // copied to rOutMtf further below. currentItem.bIsSpecial = false; } else { // create new bitmap action first if( aBoundRect.GetWidth() && aBoundRect.GetHeight() ) { Point aDstPtPix( aBoundRect.TopLeft() ); Size aDstSzPix; ScopedVclPtrInstance aMapVDev; // here, we record only mapmode information aMapVDev->EnableOutput(false); ScopedVclPtrInstance aPaintVDev; // into this one, we render. aPaintVDev->SetBackground( aBackgroundComponent.aBgColor ); rOutMtf.AddAction( new MetaPushAction( PushFlags::MAPMODE ) ); rOutMtf.AddAction( new MetaMapModeAction() ); aPaintVDev->SetDrawMode( GetDrawMode() ); while( aDstPtPix.Y() <= aBoundRect.Bottom() ) { aDstPtPix.setX( aBoundRect.Left() ); aDstSzPix = bTiling ? Size( MAX_TILE_WIDTH, MAX_TILE_HEIGHT ) : aBoundRect.GetSize(); if( ( aDstPtPix.Y() + aDstSzPix.Height() - 1 ) > aBoundRect.Bottom() ) aDstSzPix.setHeight( aBoundRect.Bottom() - aDstPtPix.Y() + 1 ); while( aDstPtPix.X() <= aBoundRect.Right() ) { if( ( aDstPtPix.X() + aDstSzPix.Width() - 1 ) > aBoundRect.Right() ) aDstSzPix.setWidth( aBoundRect.Right() - aDstPtPix.X() + 1 ); if( !tools::Rectangle( aDstPtPix, aDstSzPix ).Intersection( aBoundRect ).IsEmpty() && aPaintVDev->SetOutputSizePixel( aDstSzPix ) ) { aPaintVDev->Push(); aMapVDev->Push(); aMapVDev->mnDPIX = aPaintVDev->mnDPIX = mnDPIX; aMapVDev->mnDPIY = aPaintVDev->mnDPIY = mnDPIY; aPaintVDev->EnableOutput(false); // iterate over all actions for( pCurrAct=const_cast(rInMtf).FirstAction(), nActionNum=0; pCurrAct; pCurrAct=const_cast(rInMtf).NextAction(), ++nActionNum ) { // enable output only for // actions that are members of // the current aCCList element // (currentItem) if( aCCList_MemberMap[nActionNum] == ¤tItem ) aPaintVDev->EnableOutput(); // but process every action const MetaActionType nType( pCurrAct->GetType() ); if( MetaActionType::MAPMODE == nType ) { pCurrAct->Execute( aMapVDev.get() ); MapMode aMtfMap( aMapVDev->GetMapMode() ); const Point aNewOrg( aMapVDev->PixelToLogic( aDstPtPix ) ); aMtfMap.SetOrigin( Point( -aNewOrg.X(), -aNewOrg.Y() ) ); aPaintVDev->SetMapMode( aMtfMap ); } else if( ( MetaActionType::PUSH == nType ) || MetaActionType::POP == nType ) { pCurrAct->Execute( aMapVDev.get() ); pCurrAct->Execute( aPaintVDev.get() ); } else if( MetaActionType::GRADIENT == nType ) { MetaGradientAction* pGradientAction = static_cast(pCurrAct); Printer* pPrinter = dynamic_cast< Printer* >(this); if( pPrinter ) pPrinter->DrawGradientEx( aPaintVDev.get(), pGradientAction->GetRect(), pGradientAction->GetGradient() ); else DrawGradient( pGradientAction->GetRect(), pGradientAction->GetGradient() ); } else { pCurrAct->Execute( aPaintVDev.get() ); } Application::Reschedule( true ); } const bool bOldMap = mbMap; mbMap = aPaintVDev->mbMap = false; Bitmap aBandBmp( aPaintVDev->GetBitmap( Point(), aDstSzPix ) ); // scale down bitmap, if requested if( bDownsampleBitmaps ) { aBandBmp = GetDownsampledBitmap( aDstSzPix, Point(), aBandBmp.GetSizePixel(), aBandBmp, nMaxBmpDPIX, nMaxBmpDPIY ); } rOutMtf.AddAction( new MetaCommentAction( "PRNSPOOL_TRANSPARENTBITMAP_BEGIN" ) ); rOutMtf.AddAction( new MetaBmpScaleAction( aDstPtPix, aDstSzPix, aBandBmp ) ); rOutMtf.AddAction( new MetaCommentAction( "PRNSPOOL_TRANSPARENTBITMAP_END" ) ); aPaintVDev->mbMap = true; mbMap = bOldMap; aMapVDev->Pop(); aPaintVDev->Pop(); } // overlapping bands to avoid missing lines (e.g. PostScript) aDstPtPix.AdjustX(aDstSzPix.Width() ); } // overlapping bands to avoid missing lines (e.g. PostScript) aDstPtPix.AdjustY(aDstSzPix.Height() ); } rOutMtf.AddAction( new MetaPopAction() ); } } } } aMapModeVDev->ClearStack(); // clean up aMapModeVDev // STAGE 4: Copy actions to output metafile // iterate over all actions and duplicate the ones not in a // special aCCList member into rOutMtf for( pCurrAct=const_cast(rInMtf).FirstAction(), nActionNum=0; pCurrAct; pCurrAct=const_cast(rInMtf).NextAction(), ++nActionNum ) { const ConnectedComponents* pCurrAssociatedComponent = aCCList_MemberMap[nActionNum]; // NOTE: This relies on the fact that map-mode or draw // mode changing actions are solitary aCCList elements and // have empty bounding boxes, see comment on stage 2.1 // above if( pCurrAssociatedComponent && (pCurrAssociatedComponent->aBounds.IsEmpty() || !pCurrAssociatedComponent->bIsSpecial) ) { // #107169# Treat transparent bitmaps special, if they // are the first (or sole) action in their bounds // list. Note that we previously ensured that no // fully-transparent objects are before us here. if( DoesActionHandleTransparency( *pCurrAct ) && pCurrAssociatedComponent->aComponentList.begin()->first == pCurrAct ) { // convert actions, where masked-out parts are of // given background color ImplConvertTransparentAction(rOutMtf, *pCurrAct, *aMapModeVDev, aBackgroundComponent.aBgColor); } else { // simply add this action rOutMtf.AddAction( pCurrAct ); } pCurrAct->Execute(aMapModeVDev.get()); } } rOutMtf.SetPrefMapMode( rInMtf.GetPrefMapMode() ); rOutMtf.SetPrefSize( rInMtf.GetPrefSize() ); #if OSL_DEBUG_LEVEL > 1 // iterate over all aCCList members and generate rectangles for the bounding boxes rOutMtf.AddAction( new MetaFillColorAction( COL_WHITE, false ) ); for(auto const& aCurr:aCCList) { if( aCurr.bIsSpecial ) rOutMtf.AddAction( new MetaLineColorAction( COL_RED, true) ); else rOutMtf.AddAction( new MetaLineColorAction( COL_BLUE, true) ); rOutMtf.AddAction( new MetaRectAction( aMapModeVDev->PixelToLogic( aCurr.aBounds ) ) ); } #endif } return bTransparent; } void Printer::DrawGradientEx( OutputDevice* pOut, const tools::Rectangle& rRect, const Gradient& rGradient ) { const PrinterOptions& rPrinterOptions = GetPrinterOptions(); if( rPrinterOptions.IsReduceGradients() ) { if( PrinterGradientMode::Stripes == rPrinterOptions.GetReducedGradientMode() ) { if( !rGradient.GetSteps() || ( rGradient.GetSteps() > rPrinterOptions.GetReducedGradientStepCount() ) ) { Gradient aNewGradient( rGradient ); aNewGradient.SetSteps( rPrinterOptions.GetReducedGradientStepCount() ); pOut->DrawGradient( rRect, aNewGradient ); } else pOut->DrawGradient( rRect, rGradient ); } else { const Color& rStartColor = rGradient.GetStartColor(); const Color& rEndColor = rGradient.GetEndColor(); const long nR = ( ( static_cast(rStartColor.GetRed()) * rGradient.GetStartIntensity() ) / 100 + ( static_cast(rEndColor.GetRed()) * rGradient.GetEndIntensity() ) / 100 ) >> 1; const long nG = ( ( static_cast(rStartColor.GetGreen()) * rGradient.GetStartIntensity() ) / 100 + ( static_cast(rEndColor.GetGreen()) * rGradient.GetEndIntensity() ) / 100 ) >> 1; const long nB = ( ( static_cast(rStartColor.GetBlue()) * rGradient.GetStartIntensity() ) / 100 + ( static_cast(rEndColor.GetBlue()) * rGradient.GetEndIntensity() ) / 100 ) >> 1; const Color aColor( static_cast(nR), static_cast(nG), static_cast(nB) ); pOut->Push( PushFlags::LINECOLOR | PushFlags::FILLCOLOR ); pOut->SetLineColor( aColor ); pOut->SetFillColor( aColor ); pOut->DrawRect( rRect ); pOut->Pop(); } } else pOut->DrawGradient( rRect, rGradient ); } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */