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-rw-r--r--cppcanvas/source/mtfrenderer/transparencygroupaction.cxx473
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diff --git a/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx b/cppcanvas/source/mtfrenderer/transparencygroupaction.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/config.h>
+
+#include <utility>
+
+#include <tools/gen.hxx>
+#include <tools/debug.hxx>
+
+#include <canvas/canvastools.hxx>
+
+#include <com/sun/star/rendering/XBitmap.hpp>
+#include <com/sun/star/rendering/XCanvas.hpp>
+
+#include <vcl/metaact.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/virdev.hxx>
+#include <vcl/gdimtf.hxx>
+
+#include <basegfx/range/b2drange.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/vector/b2dsize.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/tuple/b2dtuple.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <sal/log.hxx>
+
+#include "transparencygroupaction.hxx"
+#include <outdevstate.hxx>
+#include "mtftools.hxx"
+#include <cppcanvas/vclfactory.hxx>
+
+#if OSL_DEBUG_LEVEL > 2
+#include <vcl/canvastools.hxx>
+#endif
+
+using namespace ::com::sun::star;
+
+namespace cppcanvas::internal
+{
+ // free support functions
+ // ======================
+ namespace
+ {
+ class TransparencyGroupAction : public Action
+ {
+ public:
+ /** Create new transparency group action.
+
+ @param rGroupMtf
+ Metafile that groups all actions to be rendered
+ transparent.
+
+ @param rAlphaGradient
+ VCL gradient, to be rendered into the action's alpha
+ channel.
+
+ @param rDstPoint
+ Left, top edge of destination, in current state
+ coordinate system
+
+ @param rDstSize
+ Size of the transparency group object, in current
+ state coordinate system.
+ */
+ TransparencyGroupAction( MtfAutoPtr&& rGroupMtf,
+ GradientAutoPtr&& rAlphaGradient,
+ const ::basegfx::B2DPoint& rDstPoint,
+ const ::basegfx::B2DVector& rDstSize,
+ const CanvasSharedPtr& rCanvas,
+ const OutDevState& rState );
+
+ TransparencyGroupAction(const TransparencyGroupAction&) = delete;
+ const TransparencyGroupAction& operator=(const TransparencyGroupAction&) = delete;
+
+ virtual bool render( const ::basegfx::B2DHomMatrix& rTransformation ) const override;
+ virtual bool renderSubset( const ::basegfx::B2DHomMatrix& rTransformation,
+ const Subset& rSubset ) const override;
+
+ virtual ::basegfx::B2DRange getBounds( const ::basegfx::B2DHomMatrix& rTransformation ) const override;
+ virtual ::basegfx::B2DRange getBounds( const ::basegfx::B2DHomMatrix& rTransformation,
+ const Subset& rSubset ) const override;
+
+ virtual sal_Int32 getActionCount() const override;
+
+ private:
+ MtfAutoPtr mpGroupMtf;
+ GradientAutoPtr mpAlphaGradient;
+
+ const ::basegfx::B2DSize maDstSize;
+
+ mutable uno::Reference< rendering::XBitmap > mxBufferBitmap; // contains last rendered version
+ mutable ::basegfx::B2DHomMatrix maLastTransformation; // contains last active transformation
+ mutable Subset maLastSubset; // contains last effective subset
+
+ // transformation for
+ // mxBufferBitmap content
+ CanvasSharedPtr mpCanvas;
+ rendering::RenderState maState;
+ };
+
+
+ /** Setup transformation such that the next render call is
+ moved rPoint away, and scaled according to the ratio
+ given by src and dst size.
+ */
+ void implSetupTransform( rendering::RenderState& rRenderState,
+ const ::basegfx::B2DPoint& rDstPoint )
+ {
+ ::basegfx::B2DHomMatrix aLocalTransformation;
+
+ aLocalTransformation.translate( rDstPoint.getX(),
+ rDstPoint.getY() );
+ ::canvas::tools::appendToRenderState( rRenderState,
+ aLocalTransformation );
+ }
+
+ TransparencyGroupAction::TransparencyGroupAction( MtfAutoPtr&& rGroupMtf,
+ GradientAutoPtr&& rAlphaGradient,
+ const ::basegfx::B2DPoint& rDstPoint,
+ const ::basegfx::B2DVector& rDstSize,
+ const CanvasSharedPtr& rCanvas,
+ const OutDevState& rState ) :
+ mpGroupMtf( std::move(rGroupMtf) ),
+ mpAlphaGradient( std::move(rAlphaGradient) ),
+ maDstSize( rDstSize ),
+ mpCanvas( rCanvas )
+ {
+ tools::initRenderState(maState,rState);
+ implSetupTransform( maState, rDstPoint );
+
+ // correct clip (which is relative to original transform)
+ tools::modifyClip( maState,
+ rState,
+ rCanvas,
+ rDstPoint,
+ nullptr,
+ nullptr );
+
+ maLastSubset.mnSubsetBegin = 0;
+ maLastSubset.mnSubsetEnd = -1;
+ }
+
+ // TODO(P3): The whole float transparency handling is a mess,
+ // this should be refactored. What's more, the old idea of
+ // having only internal 'metaactions', and not the original
+ // GDIMetaFile now looks a lot less attractive. Try to move
+ // into the direction of having a direct GDIMetaFile2XCanvas
+ // renderer, and maybe a separate metafile XCanvas
+ // implementation.
+ bool TransparencyGroupAction::renderSubset( const ::basegfx::B2DHomMatrix& rTransformation,
+ const Subset& rSubset ) const
+ {
+ SAL_INFO( "cppcanvas.emf", "::cppcanvas::internal::TransparencyGroupAction::renderSubset()" );
+ SAL_INFO( "cppcanvas.emf", "::cppcanvas::internal::TransparencyGroupAction: 0x" << std::hex << this );
+
+ // determine overall transformation matrix (render, view,
+ // and passed transformation)
+ ::basegfx::B2DHomMatrix aTransform;
+ ::canvas::tools::getRenderStateTransform( aTransform, maState );
+ aTransform = rTransformation * aTransform;
+
+ ::basegfx::B2DHomMatrix aTotalTransform;
+ ::canvas::tools::getViewStateTransform( aTotalTransform, mpCanvas->getViewState() );
+ aTotalTransform = aTotalTransform * aTransform;
+
+ // since pure translational changes to the transformation
+ // does not matter, remove them before comparing
+ aTotalTransform.set( 0, 2, 0.0 );
+ aTotalTransform.set( 1, 2, 0.0 );
+
+ // determine total scaling factor of the
+ // transformation matrix - need to make the bitmap
+ // large enough
+ ::basegfx::B2DTuple aScale;
+ ::basegfx::B2DTuple aTranslate;
+ double nRotate;
+ double nShearX;
+ if( !aTotalTransform.decompose( aScale,
+ aTranslate,
+ nRotate,
+ nShearX ) )
+ {
+ SAL_WARN( "cppcanvas.emf", "TransparencyGroupAction::renderSubset(): non-decomposable transformation" );
+ return false;
+ }
+
+ // if there's no buffer bitmap, or as soon as the
+ // total transformation changes, we've got to
+ // re-render the bitmap
+ if( !mxBufferBitmap.is() ||
+ aTotalTransform != maLastTransformation ||
+ rSubset.mnSubsetBegin != maLastSubset.mnSubsetBegin ||
+ rSubset.mnSubsetEnd != maLastSubset.mnSubsetEnd )
+ {
+ DBG_TESTSOLARMUTEX();
+
+ // output size of metafile
+ ::Size aOutputSizePixel( ::basegfx::fround( aScale.getX() * maDstSize.getX() ),
+ ::basegfx::fround( aScale.getY() * maDstSize.getY() ) );
+
+ // pixel size of cache bitmap: round up to nearest int
+ ::Size aBitmapSizePixel( static_cast<sal_Int32>( aScale.getX() * maDstSize.getX() )+1,
+ static_cast<sal_Int32>( aScale.getY() * maDstSize.getY() )+1 );
+
+ ::Point aEmptyPoint;
+
+ // render our content into an appropriately sized
+ // VirtualDevice with alpha channel
+ ScopedVclPtrInstance<VirtualDevice> aVDev(
+ *::Application::GetDefaultDevice(), DeviceFormat::DEFAULT, DeviceFormat::DEFAULT );
+ aVDev->SetOutputSizePixel( aBitmapSizePixel );
+ aVDev->SetMapMode();
+
+ if( rSubset.mnSubsetBegin != 0 ||
+ rSubset.mnSubsetEnd != -1 )
+ {
+ // true subset - extract referenced
+ // metaactions from mpGroupMtf
+ GDIMetaFile aMtf;
+ MetaAction* pCurrAct;
+ int nCurrActionIndex;
+
+ // extract subset actions
+ for( nCurrActionIndex=0,
+ pCurrAct=mpGroupMtf->FirstAction();
+ pCurrAct;
+ ++nCurrActionIndex, pCurrAct = mpGroupMtf->NextAction() )
+ {
+ switch( pCurrAct->GetType() )
+ {
+ case MetaActionType::PUSH:
+ case MetaActionType::POP:
+ case MetaActionType::CLIPREGION:
+ case MetaActionType::ISECTRECTCLIPREGION:
+ case MetaActionType::ISECTREGIONCLIPREGION:
+ case MetaActionType::MOVECLIPREGION:
+ case MetaActionType::LINECOLOR:
+ case MetaActionType::FILLCOLOR:
+ case MetaActionType::TEXTCOLOR:
+ case MetaActionType::TEXTFILLCOLOR:
+ case MetaActionType::TEXTLINECOLOR:
+ case MetaActionType::TEXTALIGN:
+ case MetaActionType::FONT:
+ case MetaActionType::RASTEROP:
+ case MetaActionType::REFPOINT:
+ case MetaActionType::LAYOUTMODE:
+ // state-changing action - copy as-is
+ aMtf.AddAction( pCurrAct->Clone() );
+ break;
+
+ case MetaActionType::GRADIENT:
+ case MetaActionType::HATCH:
+ case MetaActionType::EPS:
+ case MetaActionType::COMMENT:
+ case MetaActionType::POINT:
+ case MetaActionType::PIXEL:
+ case MetaActionType::LINE:
+ case MetaActionType::RECT:
+ case MetaActionType::ROUNDRECT:
+ case MetaActionType::ELLIPSE:
+ case MetaActionType::ARC:
+ case MetaActionType::PIE:
+ case MetaActionType::CHORD:
+ case MetaActionType::POLYLINE:
+ case MetaActionType::POLYGON:
+ case MetaActionType::POLYPOLYGON:
+ 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::GRADIENTEX:
+ case MetaActionType::WALLPAPER:
+ case MetaActionType::Transparent:
+ case MetaActionType::FLOATTRANSPARENT:
+ case MetaActionType::TEXT:
+ case MetaActionType::TEXTARRAY:
+ case MetaActionType::TEXTLINE:
+ case MetaActionType::TEXTRECT:
+ case MetaActionType::STRETCHTEXT:
+ // output-generating action - only
+ // copy, if we're within the
+ // requested subset
+ if( rSubset.mnSubsetBegin <= nCurrActionIndex &&
+ rSubset.mnSubsetEnd > nCurrActionIndex )
+ {
+ aMtf.AddAction( pCurrAct->Clone() );
+ }
+ break;
+
+ default:
+ SAL_WARN( "cppcanvas.emf", "Unknown meta action type encountered" );
+ break;
+ }
+ }
+
+ aVDev->DrawTransparent( aMtf,
+ aEmptyPoint,
+ aOutputSizePixel,
+ *mpAlphaGradient );
+ }
+ else
+ {
+ // no subsetting - render whole mtf
+ aVDev->DrawTransparent( *mpGroupMtf,
+ aEmptyPoint,
+ aOutputSizePixel,
+ *mpAlphaGradient );
+ }
+
+
+ // update buffered bitmap and transformation
+ BitmapSharedPtr aBmp( VCLFactory::createBitmap(
+ mpCanvas,
+ aVDev->GetBitmapEx(
+ aEmptyPoint,
+ aBitmapSizePixel ) ) );
+ mxBufferBitmap = aBmp->getUNOBitmap();
+ maLastTransformation = aTotalTransform;
+ maLastSubset = rSubset;
+ }
+
+ // determine target transformation (we can't simply pass
+ // aTotalTransform as assembled above, since we must take
+ // the canvas' view state as is, it might contain clipping
+ // (which, in turn, is relative to the view
+ // transformation))
+
+ // given that aTotalTransform is the identity
+ // transformation, we could simply render our bitmap
+ // as-is. Now, since the mxBufferBitmap content already
+ // accounts for scale changes in the overall
+ // transformation, we must factor this out
+ // before. Generally, the transformation matrix should be
+ // structured like this:
+ // Translation*Rotation*Shear*Scale. Thus, to neutralize
+ // the contained scaling, we've got to right-multiply with
+ // the inverse.
+ ::basegfx::B2DHomMatrix aScaleCorrection;
+ aScaleCorrection.scale( 1/aScale.getX(), 1/aScale.getY() );
+ aTransform = aTransform * aScaleCorrection;
+
+ rendering::RenderState aLocalState( maState );
+ ::canvas::tools::setRenderStateTransform(aLocalState, aTransform);
+
+ if(aLocalState.Clip.is())
+ {
+ // tdf#95709
+ // Adjust renderstate clip to modified scale from above
+ ::basegfx::B2DPolyPolygon aClip = ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(aLocalState.Clip);
+ aClip.transform(basegfx::utils::createScaleB2DHomMatrix(aScale));
+ aLocalState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(mpCanvas->getUNOCanvas()->getDevice(), aClip);
+ }
+
+#if OSL_DEBUG_LEVEL > 2
+ aLocalState.Clip.clear();
+ aLocalState.DeviceColor =
+ vcl::unotools::colorToDoubleSequence(
+ ::Color( 0x80FF0000 ),
+ mpCanvas->getUNOCanvas()->getDevice()->getDeviceColorSpace() );
+
+ if( maState.Clip.is() )
+ mpCanvas->getUNOCanvas()->fillPolyPolygon( maState.Clip,
+ mpCanvas->getViewState(),
+ aLocalState );
+
+ aLocalState.DeviceColor = maState.DeviceColor;
+#endif
+
+ // no further alpha changes necessary -> draw directly
+ mpCanvas->getUNOCanvas()->drawBitmap( mxBufferBitmap,
+ mpCanvas->getViewState(),
+ aLocalState );
+ return true;
+ }
+
+ // TODO(P3): The whole float transparency handling is a mess,
+ // this should be refactored. What's more, the old idea of
+ // having only internal 'metaactions', and not the original
+ // GDIMetaFile now looks a lot less attractive. Try to move
+ // into the direction of having a direct GDIMetaFile2XCanvas
+ // renderer, and maybe a separate metafile XCanvas
+ // implementation.
+ bool TransparencyGroupAction::render( const ::basegfx::B2DHomMatrix& rTransformation ) const
+ {
+ Subset aSubset;
+
+ aSubset.mnSubsetBegin = 0;
+ aSubset.mnSubsetEnd = -1;
+
+ return renderSubset( rTransformation, aSubset );
+ }
+
+ ::basegfx::B2DRange TransparencyGroupAction::getBounds( const ::basegfx::B2DHomMatrix& rTransformation ) const
+ {
+ rendering::RenderState aLocalState( maState );
+ ::canvas::tools::prependToRenderState(aLocalState, rTransformation);
+
+ return tools::calcDevicePixelBounds(
+ ::basegfx::B2DRange( 0,0,
+ maDstSize.getX(),
+ maDstSize.getY() ),
+ mpCanvas->getViewState(),
+ aLocalState );
+ }
+
+ ::basegfx::B2DRange TransparencyGroupAction::getBounds( const ::basegfx::B2DHomMatrix& rTransformation,
+ const Subset& rSubset ) const
+ {
+ // TODO(F3): Currently, the bounds for
+ // TransparencyGroupAction subsets equal those of the
+ // full set, although this action is able to render
+ // true subsets.
+
+ // polygon only contains a single action, empty bounds
+ // if subset requests different range
+ if( rSubset.mnSubsetBegin != 0 ||
+ rSubset.mnSubsetEnd != 1 )
+ return ::basegfx::B2DRange();
+
+ return getBounds( rTransformation );
+ }
+
+ sal_Int32 TransparencyGroupAction::getActionCount() const
+ {
+ return mpGroupMtf ? mpGroupMtf->GetActionSize() : 0;
+ }
+
+ }
+
+ std::shared_ptr<Action> TransparencyGroupActionFactory::createTransparencyGroupAction( MtfAutoPtr&& rGroupMtf,
+ GradientAutoPtr&& rAlphaGradient,
+ const ::basegfx::B2DPoint& rDstPoint,
+ const ::basegfx::B2DVector& rDstSize,
+ const CanvasSharedPtr& rCanvas,
+ const OutDevState& rState )
+ {
+ return std::make_shared<TransparencyGroupAction>(std::move(rGroupMtf),
+ std::move(rAlphaGradient),
+ rDstPoint,
+ rDstSize,
+ rCanvas,
+ rState );
+ }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-20 18:36:00 +0000