Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 473 insertions, 0 deletions

diff --git a/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx b/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx
new file mode 100644
index 000000000..e0562361e
--- /dev/null
+++ b/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx
@@ -0,0 +1,473 @@
+/* -*- 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: */