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Diffstat (limited to 'vcl/source/outdev/bitmapex.cxx')
| -rw-r--r-- | vcl/source/outdev/bitmapex.cxx | 682 |
1 files changed, 682 insertions, 0 deletions
diff --git a/vcl/source/outdev/bitmapex.cxx b/vcl/source/outdev/bitmapex.cxx new file mode 100644 index 000000000..fc966b53c --- /dev/null +++ b/vcl/source/outdev/bitmapex.cxx @@ -0,0 +1,682 @@ +/* -*- 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 <rtl/math.hxx> +#include <comphelper/lok.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> + +#include <vcl/canvastools.hxx> +#include <vcl/metaact.hxx> +#include <vcl/virdev.hxx> + +#include <drawmode.hxx> +#include <salgdi.hxx> + +void OutputDevice::DrawBitmapEx( const Point& rDestPt, + const BitmapEx& rBitmapEx ) +{ + assert(!is_double_buffered_window()); + + if( ImplIsRecordLayout() ) + return; + + if( !rBitmapEx.IsAlpha() ) + { + DrawBitmap( rDestPt, rBitmapEx.GetBitmap() ); + } + else + { + const Size aSizePix( rBitmapEx.GetSizePixel() ); + DrawBitmapEx( rDestPt, PixelToLogic( aSizePix ), Point(), aSizePix, rBitmapEx, MetaActionType::BMPEX ); + } +} + +void OutputDevice::DrawBitmapEx( const Point& rDestPt, const Size& rDestSize, + const BitmapEx& rBitmapEx ) +{ + assert(!is_double_buffered_window()); + + if( ImplIsRecordLayout() ) + return; + + if ( !rBitmapEx.IsAlpha() ) + { + DrawBitmap( rDestPt, rDestSize, rBitmapEx.GetBitmap() ); + } + else + { + DrawBitmapEx( rDestPt, rDestSize, Point(), rBitmapEx.GetSizePixel(), rBitmapEx, MetaActionType::BMPEXSCALE ); + } +} + +void OutputDevice::DrawBitmapEx( const Point& rDestPt, const Size& rDestSize, + const Point& rSrcPtPixel, const Size& rSrcSizePixel, + const BitmapEx& rBitmapEx) +{ + assert(!is_double_buffered_window()); + + if( ImplIsRecordLayout() ) + return; + + if ( !rBitmapEx.IsAlpha() ) + { + DrawBitmap( rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel, rBitmapEx.GetBitmap() ); + } + else + { + DrawBitmapEx( rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel, rBitmapEx, MetaActionType::BMPEXSCALEPART ); + } +} + +void OutputDevice::DrawBitmapEx( const Point& rDestPt, const Size& rDestSize, + const Point& rSrcPtPixel, const Size& rSrcSizePixel, + const BitmapEx& rBitmapEx, const MetaActionType nAction ) +{ + assert(!is_double_buffered_window()); + + if( ImplIsRecordLayout() ) + return; + + if( !rBitmapEx.IsAlpha() ) + { + DrawBitmap( rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel, rBitmapEx.GetBitmap() ); + } + else + { + if ( RasterOp::Invert == meRasterOp ) + { + DrawRect( tools::Rectangle( rDestPt, rDestSize ) ); + return; + } + + BitmapEx aBmpEx(vcl::drawmode::GetBitmapEx(rBitmapEx, GetDrawMode())); + + if ( mpMetaFile ) + { + switch( nAction ) + { + case MetaActionType::BMPEX: + mpMetaFile->AddAction( new MetaBmpExAction( rDestPt, aBmpEx ) ); + break; + + case MetaActionType::BMPEXSCALE: + mpMetaFile->AddAction( new MetaBmpExScaleAction( rDestPt, rDestSize, aBmpEx ) ); + break; + + case MetaActionType::BMPEXSCALEPART: + mpMetaFile->AddAction( new MetaBmpExScalePartAction( rDestPt, rDestSize, + rSrcPtPixel, rSrcSizePixel, aBmpEx ) ); + break; + + default: break; + } + } + + if ( !IsDeviceOutputNecessary() ) + return; + + if ( !mpGraphics && !AcquireGraphics() ) + return; + + if ( mbInitClipRegion ) + InitClipRegion(); + + if ( mbOutputClipped ) + return; + + DrawDeviceBitmapEx( rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel, aBmpEx ); + } +} + +BitmapEx OutputDevice::GetBitmapEx( const Point& rSrcPt, const Size& rSize ) const +{ + + // #110958# Extract alpha value from VDev, if any + if( mpAlphaVDev ) + { + Bitmap aAlphaBitmap( mpAlphaVDev->GetBitmap( rSrcPt, rSize ) ); + + // ensure 8 bit alpha + if (aAlphaBitmap.getPixelFormat() > vcl::PixelFormat::N8_BPP) + aAlphaBitmap.Convert( BmpConversion::N8BitNoConversion ); + + return BitmapEx(GetBitmap( rSrcPt, rSize ), AlphaMask( aAlphaBitmap ) ); + } + else + return BitmapEx(GetBitmap( rSrcPt, rSize )); +} + +void OutputDevice::DrawDeviceBitmapEx( const Point& rDestPt, const Size& rDestSize, + const Point& rSrcPtPixel, const Size& rSrcSizePixel, + BitmapEx& rBitmapEx ) +{ + assert(!is_double_buffered_window()); + + if (rBitmapEx.IsAlpha()) + { + DrawDeviceAlphaBitmap(rBitmapEx.GetBitmap(), rBitmapEx.GetAlpha(), rDestPt, rDestSize, rSrcPtPixel, rSrcSizePixel); + } + else if (!rBitmapEx.IsEmpty()) + { + SalTwoRect aPosAry(rSrcPtPixel.X(), rSrcPtPixel.Y(), rSrcSizePixel.Width(), rSrcSizePixel.Height(), + ImplLogicXToDevicePixel(rDestPt.X()), ImplLogicYToDevicePixel(rDestPt.Y()), + ImplLogicWidthToDevicePixel(rDestSize.Width()), + ImplLogicHeightToDevicePixel(rDestSize.Height())); + + const BmpMirrorFlags nMirrFlags = AdjustTwoRect(aPosAry, rBitmapEx.GetSizePixel()); + + if (aPosAry.mnSrcWidth && aPosAry.mnSrcHeight && aPosAry.mnDestWidth && aPosAry.mnDestHeight) + { + + if (nMirrFlags != BmpMirrorFlags::NONE) + rBitmapEx.Mirror(nMirrFlags); + + const SalBitmap* pSalSrcBmp = rBitmapEx.ImplGetBitmapSalBitmap().get(); + std::shared_ptr<SalBitmap> xMaskBmp = rBitmapEx.maAlphaMask.ImplGetSalBitmap(); + + if (xMaskBmp) + { + bool bTryDirectPaint(pSalSrcBmp); + + if (bTryDirectPaint && mpGraphics->DrawAlphaBitmap(aPosAry, *pSalSrcBmp, *xMaskBmp, *this)) + { + // tried to paint as alpha directly. If this worked, we are done (except + // alpha, see below) + } + else + { + // #4919452# reduce operation area to bounds of + // cliprect. since masked transparency involves + // creation of a large vdev and copying the screen + // content into that (slooow read from framebuffer), + // that should considerably increase performance for + // large bitmaps and small clippings. + + // Note that this optimization is a workaround for a + // Writer peculiarity, namely, to decompose background + // graphics into myriads of disjunct, tiny + // rectangles. That otherwise kills us here, since for + // transparent output, SAL always prepares the whole + // bitmap, if aPosAry contains the whole bitmap (and + // it's _not_ to blame for that). + + // Note the call to ImplPixelToDevicePixel(), since + // aPosAry already contains the mnOutOff-offsets, they + // also have to be applied to the region + tools::Rectangle aClipRegionBounds( ImplPixelToDevicePixel(maRegion).GetBoundRect() ); + + // TODO: Also respect scaling (that's a bit tricky, + // since the source points have to move fractional + // amounts (which is not possible, thus has to be + // emulated by increases copy area) + // const double nScaleX( aPosAry.mnDestWidth / aPosAry.mnSrcWidth ); + // const double nScaleY( aPosAry.mnDestHeight / aPosAry.mnSrcHeight ); + + // for now, only identity scales allowed + if (!aClipRegionBounds.IsEmpty() && + aPosAry.mnDestWidth == aPosAry.mnSrcWidth && + aPosAry.mnDestHeight == aPosAry.mnSrcHeight) + { + // now intersect dest rect with clip region + aClipRegionBounds.Intersection(tools::Rectangle(aPosAry.mnDestX, + aPosAry.mnDestY, + aPosAry.mnDestX + aPosAry.mnDestWidth - 1, + aPosAry.mnDestY + aPosAry.mnDestHeight - 1)); + + // Note: I could theoretically optimize away the + // DrawBitmap below, if the region is empty + // here. Unfortunately, cannot rule out that + // somebody relies on the side effects. + if (!aClipRegionBounds.IsEmpty()) + { + aPosAry.mnSrcX += aClipRegionBounds.Left() - aPosAry.mnDestX; + aPosAry.mnSrcY += aClipRegionBounds.Top() - aPosAry.mnDestY; + aPosAry.mnSrcWidth = aClipRegionBounds.GetWidth(); + aPosAry.mnSrcHeight = aClipRegionBounds.GetHeight(); + + aPosAry.mnDestX = aClipRegionBounds.Left(); + aPosAry.mnDestY = aClipRegionBounds.Top(); + aPosAry.mnDestWidth = aClipRegionBounds.GetWidth(); + aPosAry.mnDestHeight = aClipRegionBounds.GetHeight(); + } + } + + mpGraphics->DrawBitmap(aPosAry, *pSalSrcBmp, *xMaskBmp, *this); + } + + // #110958# Paint mask to alpha channel. Luckily, the + // black and white representation of the mask maps to + // the alpha channel + + // #i25167# Restrict mask painting to _opaque_ areas + // of the mask, otherwise we spoil areas where no + // bitmap content was ever visible. Interestingly + // enough, this can be achieved by taking the mask as + // the transparency mask of itself + if (mpAlphaVDev) + mpAlphaVDev->DrawBitmapEx(rDestPt, + rDestSize, + BitmapEx(rBitmapEx.GetAlpha(), + rBitmapEx.GetAlpha())); + } + else + { + mpGraphics->DrawBitmap(aPosAry, *pSalSrcBmp, *this); + + if (mpAlphaVDev) + { + // #i32109#: Make bitmap area opaque + mpAlphaVDev->ImplFillOpaqueRectangle( tools::Rectangle(rDestPt, rDestSize) ); + } + } + } + } +} + +bool OutputDevice::DrawTransformBitmapExDirect( + const basegfx::B2DHomMatrix& aFullTransform, + const BitmapEx& rBitmapEx, + double fAlpha) +{ + assert(!is_double_buffered_window()); + + bool bDone = false; + + // try to paint directly + const basegfx::B2DPoint aNull(aFullTransform * basegfx::B2DPoint(0.0, 0.0)); + const basegfx::B2DPoint aTopX(aFullTransform * basegfx::B2DPoint(1.0, 0.0)); + const basegfx::B2DPoint aTopY(aFullTransform * basegfx::B2DPoint(0.0, 1.0)); + SalBitmap* pSalSrcBmp = rBitmapEx.GetBitmap().ImplGetSalBitmap().get(); + Bitmap aAlphaBitmap; + + if(rBitmapEx.IsAlpha()) + { + aAlphaBitmap = rBitmapEx.GetAlpha(); + } + else if (mpAlphaVDev) + { + aAlphaBitmap = AlphaMask(rBitmapEx.GetSizePixel()); + aAlphaBitmap.Erase(COL_BLACK); // opaque + } + + SalBitmap* pSalAlphaBmp = aAlphaBitmap.ImplGetSalBitmap().get(); + + bDone = mpGraphics->DrawTransformedBitmap( + aNull, + aTopX, + aTopY, + *pSalSrcBmp, + pSalAlphaBmp, + fAlpha, + *this); + + if (mpAlphaVDev) + { + // Merge bitmap alpha to alpha device + AlphaMask aAlpha(rBitmapEx.GetSizePixel()); + aAlpha.Erase( ( 1 - fAlpha ) * 255 ); + mpAlphaVDev->DrawTransformBitmapExDirect(aFullTransform, BitmapEx(aAlpha, aAlphaBitmap)); + } + + return bDone; +}; + +bool OutputDevice::TransformAndReduceBitmapExToTargetRange( + const basegfx::B2DHomMatrix& aFullTransform, + basegfx::B2DRange &aVisibleRange, + double &fMaximumArea) +{ + // limit TargetRange to existing pixels (if pixel device) + // first get discrete range of object + basegfx::B2DRange aFullPixelRange(aVisibleRange); + + aFullPixelRange.transform(aFullTransform); + + if(basegfx::fTools::equalZero(aFullPixelRange.getWidth()) || basegfx::fTools::equalZero(aFullPixelRange.getHeight())) + { + // object is outside of visible area + return false; + } + + // now get discrete target pixels; start with OutDev pixel size and evtl. + // intersect with active clipping area + basegfx::B2DRange aOutPixel( + 0.0, + 0.0, + GetOutputSizePixel().Width(), + GetOutputSizePixel().Height()); + + if(IsClipRegion()) + { + tools::Rectangle aRegionRectangle(GetActiveClipRegion().GetBoundRect()); + + // caution! Range from rectangle, one too much (!) + aRegionRectangle.AdjustRight(-1); + aRegionRectangle.AdjustBottom(-1); + aOutPixel.intersect( vcl::unotools::b2DRectangleFromRectangle(aRegionRectangle) ); + } + + if(aOutPixel.isEmpty()) + { + // no active output area + return false; + } + + // if aFullPixelRange is not completely inside of aOutPixel, + // reduction of target pixels is possible + basegfx::B2DRange aVisiblePixelRange(aFullPixelRange); + + if(!aOutPixel.isInside(aFullPixelRange)) + { + aVisiblePixelRange.intersect(aOutPixel); + + if(aVisiblePixelRange.isEmpty()) + { + // nothing in visible part, reduces to nothing + return false; + } + + // aVisiblePixelRange contains the reduced output area in + // discrete coordinates. To make it useful everywhere, make it relative to + // the object range + basegfx::B2DHomMatrix aMakeVisibleRangeRelative; + + aVisibleRange = aVisiblePixelRange; + aMakeVisibleRangeRelative.translate( + -aFullPixelRange.getMinX(), + -aFullPixelRange.getMinY()); + aMakeVisibleRangeRelative.scale( + 1.0 / aFullPixelRange.getWidth(), + 1.0 / aFullPixelRange.getHeight()); + aVisibleRange.transform(aMakeVisibleRangeRelative); + } + + // for pixel devices, do *not* limit size, else OutputDevice::DrawDeviceAlphaBitmap + // will create another, badly scaled bitmap to do the job. Nonetheless, do a + // maximum clipping of something big (1600x1280x2). Add 1.0 to avoid rounding + // errors in rough estimations + const double fNewMaxArea(aVisiblePixelRange.getWidth() * aVisiblePixelRange.getHeight()); + + fMaximumArea = std::min(4096000.0, fNewMaxArea + 1.0); + + return true; +} + +// MM02 add some test class to get a simple timer-based output to be able +// to check if it gets faster - and how much. Uncomment next line or set +// DO_TIME_TEST for compile time if you want to use it +// #define DO_TIME_TEST +#ifdef DO_TIME_TEST +#include <tools/time.hxx> +struct LocalTimeTest +{ + const sal_uInt64 nStartTime; + LocalTimeTest() : nStartTime(tools::Time::GetSystemTicks()) {} + ~LocalTimeTest() + { + const sal_uInt64 nEndTime(tools::Time::GetSystemTicks()); + const sal_uInt64 nDiffTime(nEndTime - nStartTime); + + if(nDiffTime > 0) + { + OStringBuffer aOutput("Time: "); + OString aNumber(OString::number(nDiffTime)); + aOutput.append(aNumber); + OSL_FAIL(aOutput.getStr()); + } + } +}; +#endif + +void OutputDevice::DrawTransformedBitmapEx( + const basegfx::B2DHomMatrix& rTransformation, + const BitmapEx& rBitmapEx, + double fAlpha) +{ + assert(!is_double_buffered_window()); + + if( ImplIsRecordLayout() ) + return; + + if(rBitmapEx.IsEmpty()) + return; + + if(rtl::math::approxEqual( fAlpha, 0.0 )) + return; + + // MM02 compared to other public methods of OutputDevice + // this test was missing and led to zero-ptr-accesses + if ( !mpGraphics && !AcquireGraphics() ) + return; + + if ( mbInitClipRegion ) + InitClipRegion(); + + const bool bMetafile(nullptr != mpMetaFile); + /* + tdf#135325 typically in these OutputDevice methods, for the in + record-to-metafile case the MetaFile is already written to before the + test against mbOutputClipped to determine that output to the current + device would result in no visual output. In this case the metafile is + written after the test, so we must continue past mbOutputClipped if + recording to a metafile. It's typical to record with a device of nominal + size and play back later against something of a totally different size. + */ + if (mbOutputClipped && !bMetafile) + return; + +#ifdef DO_TIME_TEST + // MM02 start time test when some data (not for trivial stuff). Will + // trigger and show data when leaving this method by destructing helper + static const char* pEnableBitmapDrawTimerTimer(getenv("SAL_ENABLE_TIMER_BITMAPDRAW")); + static bool bUseTimer(nullptr != pEnableBitmapDrawTimerTimer); + std::unique_ptr<LocalTimeTest> aTimeTest( + bUseTimer && rBitmapEx.GetSizeBytes() > 10000 + ? new LocalTimeTest() + : nullptr); +#endif + + BitmapEx bitmapEx = rBitmapEx; + + const bool bInvert(RasterOp::Invert == meRasterOp); + const bool bBitmapChangedColor(mnDrawMode & (DrawModeFlags::BlackBitmap | DrawModeFlags::WhiteBitmap | DrawModeFlags::GrayBitmap )); + const bool bTryDirectPaint(!bInvert && !bBitmapChangedColor && !bMetafile); + // tdf#130768 CAUTION(!) using GetViewTransformation() is *not* enough here, it may + // be that mnOutOffX/mnOutOffY is used - see AOO bug 75163, mentioned at + // ImplGetDeviceTransformation declaration + basegfx::B2DHomMatrix aFullTransform(ImplGetDeviceTransformation() * rTransformation); + + // First try to handle additional alpha blending, either directly, or modify the bitmap. + if(!rtl::math::approxEqual( fAlpha, 1.0 )) + { + if(bTryDirectPaint) + { + if(DrawTransformBitmapExDirect(aFullTransform, bitmapEx, fAlpha)) + { + // we are done + return; + } + } + // Apply the alpha manually. + sal_uInt8 nColor( static_cast<sal_uInt8>( ::basegfx::fround( 255.0*(1.0 - fAlpha) + .5) ) ); + AlphaMask aAlpha( bitmapEx.GetSizePixel(), &nColor ); + if( bitmapEx.IsAlpha()) + aAlpha.BlendWith( bitmapEx.GetAlpha()); + bitmapEx = BitmapEx( bitmapEx.GetBitmap(), aAlpha ); + } + if(rtl::math::approxEqual( fAlpha, 1.0 )) + fAlpha = 1.0; // avoid the need for approxEqual in backends + + // If the backend's implementation is known to not need any optimizations here, pass to it directly. + // With most backends it's more performant to try to simplify to DrawBitmapEx() first. + if(bTryDirectPaint && mpGraphics->HasFastDrawTransformedBitmap() && DrawTransformBitmapExDirect(aFullTransform, bitmapEx)) + return; + + // decompose matrix to check rotation and shear + basegfx::B2DVector aScale, aTranslate; + double fRotate, fShearX; + rTransformation.decompose(aScale, aTranslate, fRotate, fShearX); + const bool bRotated(!basegfx::fTools::equalZero(fRotate)); + const bool bSheared(!basegfx::fTools::equalZero(fShearX)); + const bool bMirroredX(basegfx::fTools::less(aScale.getX(), 0.0)); + const bool bMirroredY(basegfx::fTools::less(aScale.getY(), 0.0)); + + if(!bRotated && !bSheared && !bMirroredX && !bMirroredY) + { + // with no rotation, shear or mirroring it can be mapped to DrawBitmapEx + // do *not* execute the mirroring here, it's done in the fallback + // #i124580# the correct DestSize needs to be calculated based on MaxXY values + Point aDestPt(basegfx::fround(aTranslate.getX()), basegfx::fround(aTranslate.getY())); + const Size aDestSize( + basegfx::fround(aScale.getX() + aTranslate.getX()) - aDestPt.X(), + basegfx::fround(aScale.getY() + aTranslate.getY()) - aDestPt.Y()); + const Point aOrigin = GetMapMode().GetOrigin(); + if (!bMetafile && comphelper::LibreOfficeKit::isActive() && GetMapMode().GetMapUnit() != MapUnit::MapPixel) + { + aDestPt.Move(aOrigin.getX(), aOrigin.getY()); + EnableMapMode(false); + } + + DrawBitmapEx(aDestPt, aDestSize, bitmapEx); + if (!bMetafile && comphelper::LibreOfficeKit::isActive() && GetMapMode().GetMapUnit() != MapUnit::MapPixel) + { + EnableMapMode(); + aDestPt.Move(-aOrigin.getX(), -aOrigin.getY()); + } + return; + } + + // Try the backend's implementation before resorting to the slower fallback here. + if(bTryDirectPaint && DrawTransformBitmapExDirect(aFullTransform, bitmapEx)) + return; + + // take the fallback when no rotate and shear, but mirror (else we would have done this above) + if(!bRotated && !bSheared) + { + // with no rotation or shear it can be mapped to DrawBitmapEx + // do *not* execute the mirroring here, it's done in the fallback + // #i124580# the correct DestSize needs to be calculated based on MaxXY values + const Point aDestPt(basegfx::fround(aTranslate.getX()), basegfx::fround(aTranslate.getY())); + const Size aDestSize( + basegfx::fround(aScale.getX() + aTranslate.getX()) - aDestPt.X(), + basegfx::fround(aScale.getY() + aTranslate.getY()) - aDestPt.Y()); + + DrawBitmapEx(aDestPt, aDestSize, bitmapEx); + return; + } + + // at this point we are either sheared or rotated or both + assert(bSheared || bRotated); + + // fallback; create transformed bitmap the hard way (back-transform + // the pixels) and paint + basegfx::B2DRange aVisibleRange(0.0, 0.0, 1.0, 1.0); + + // limit maximum area to something looking good for non-pixel-based targets (metafile, printer) + // by using a fixed minimum (allow at least, but no need to utilize) for good smoothing and an area + // dependent of original size for good quality when e.g. rotated/sheared. Still, limit to a maximum + // to avoid crashes/resource problems (ca. 1500x3000 here) + const Size& rOriginalSizePixel(bitmapEx.GetSizePixel()); + const double fOrigArea(rOriginalSizePixel.Width() * rOriginalSizePixel.Height() * 0.5); + const double fOrigAreaScaled(fOrigArea * 1.44); + double fMaximumArea(std::clamp(fOrigAreaScaled, 1000000.0, 4500000.0)); + + if(!bMetafile) + { + if ( !TransformAndReduceBitmapExToTargetRange( aFullTransform, aVisibleRange, fMaximumArea ) ) + return; + } + + if(aVisibleRange.isEmpty()) + return; + + BitmapEx aTransformed(bitmapEx); + + // #122923# when the result needs an alpha channel due to being rotated or sheared + // and thus uncovering areas, add these channels so that the own transformer (used + // in getTransformed) also creates a transformed alpha channel + if(!aTransformed.IsAlpha() && (bSheared || bRotated)) + { + // parts will be uncovered, extend aTransformed with a mask bitmap + const Bitmap aContent(aTransformed.GetBitmap()); + + AlphaMask aMaskBmp(aContent.GetSizePixel()); + aMaskBmp.Erase(0); + + aTransformed = BitmapEx(aContent, aMaskBmp); + } + + basegfx::B2DVector aFullScale, aFullTranslate; + double fFullRotate, fFullShearX; + aFullTransform.decompose(aFullScale, aFullTranslate, fFullRotate, fFullShearX); + + double fSourceRatio = 1.0; + if (rOriginalSizePixel.getHeight() != 0) + { + fSourceRatio = rOriginalSizePixel.getWidth() / rOriginalSizePixel.getHeight(); + } + double fTargetRatio = 1.0; + if (aFullScale.getY() != 0) + { + fTargetRatio = aFullScale.getX() / aFullScale.getY(); + } + bool bAspectRatioKept = rtl::math::approxEqual(fSourceRatio, fTargetRatio); + if (bSheared || !bAspectRatioKept) + { + // Not only rotation, or scaling does not keep aspect ratio. + aTransformed = aTransformed.getTransformed( + aFullTransform, + aVisibleRange, + fMaximumArea); + } + else + { + // Just rotation, can do that directly. + fFullRotate = fmod(fFullRotate * -1, 2 * M_PI); + if (fFullRotate < 0) + { + fFullRotate += 2 * M_PI; + } + Degree10 nAngle10(basegfx::fround(basegfx::rad2deg<10>(fFullRotate))); + aTransformed.Rotate(nAngle10, COL_TRANSPARENT); + } + basegfx::B2DRange aTargetRange(0.0, 0.0, 1.0, 1.0); + + // get logic object target range + aTargetRange.transform(rTransformation); + + // get from unified/relative VisibleRange to logoc one + aVisibleRange.transform( + basegfx::utils::createScaleTranslateB2DHomMatrix( + aTargetRange.getRange(), + aTargetRange.getMinimum())); + + // extract point and size; do not remove size, the bitmap may have been prepared reduced by purpose + // #i124580# the correct DestSize needs to be calculated based on MaxXY values + const Point aDestPt(basegfx::fround(aVisibleRange.getMinX()), basegfx::fround(aVisibleRange.getMinY())); + const Size aDestSize( + basegfx::fround(aVisibleRange.getMaxX()) - aDestPt.X(), + basegfx::fround(aVisibleRange.getMaxY()) - aDestPt.Y()); + + DrawBitmapEx(aDestPt, aDestSize, aTransformed); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ |