17dd2662cc
Change-Id: Ic307226591ff9702957ccdec486ccf70357eb6d9 Reviewed-on: https://gerrit.libreoffice.org/65951 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
571 lines
21 KiB
C++
571 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <sal/log.hxx>
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#include <math.h>
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#include <memory>
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#include <basegfx/matrix/b2dhommatrix.hxx>
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#include <basegfx/numeric/ftools.hxx>
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#include <cppuhelper/supportsservice.hxx>
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#include <tools/diagnose_ex.h>
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#include <vcl/metric.hxx>
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#include <vcl/sysdata.hxx>
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#include <vcl/virdev.hxx>
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#include "cairo_spritecanvas.hxx"
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#include "cairo_textlayout.hxx"
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#if defined CAIRO_HAS_FT_FONT
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# include <cairo-ft.h>
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#else
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# error Native API needed.
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#endif
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using namespace ::cairo;
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using namespace ::com::sun::star;
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namespace cairocanvas
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{
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namespace
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{
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void setupLayoutMode( OutputDevice& rOutDev,
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sal_Int8 nTextDirection )
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{
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// TODO(P3): avoid if already correctly set
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ComplexTextLayoutFlags nLayoutMode = ComplexTextLayoutFlags::Default;
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switch( nTextDirection )
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{
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case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
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break;
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case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
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nLayoutMode = ComplexTextLayoutFlags::BiDiStrong;
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break;
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case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
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nLayoutMode = ComplexTextLayoutFlags::BiDiRtl;
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break;
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case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
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nLayoutMode = ComplexTextLayoutFlags::BiDiRtl | ComplexTextLayoutFlags::BiDiStrong;
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break;
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default:
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break;
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}
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// set calculated layout mode. Origin is always the left edge,
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// as required at the API spec
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rOutDev.SetLayoutMode( nLayoutMode | ComplexTextLayoutFlags::TextOriginLeft );
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}
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bool compareFallbacks(const SystemGlyphData&rA, const SystemGlyphData &rB)
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{
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return rA.fallbacklevel < rB.fallbacklevel;
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}
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}
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TextLayout::TextLayout( const rendering::StringContext& aText,
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sal_Int8 nDirection,
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sal_Int64 /*nRandomSeed*/,
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const CanvasFont::Reference& rFont,
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const SurfaceProviderRef& rRefDevice ) :
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TextLayout_Base( m_aMutex ),
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maText( aText ),
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maLogicalAdvancements(),
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mpFont( rFont ),
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mpRefDevice( rRefDevice ),
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mnTextDirection( nDirection )
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{
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}
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TextLayout::~TextLayout()
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{
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}
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void SAL_CALL TextLayout::disposing()
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{
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::osl::MutexGuard aGuard( m_aMutex );
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mpFont.clear();
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mpRefDevice.clear();
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}
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// XTextLayout
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uno::Sequence< uno::Reference< rendering::XPolyPolygon2D > > SAL_CALL TextLayout::queryTextShapes( )
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{
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// TODO
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return uno::Sequence< uno::Reference< rendering::XPolyPolygon2D > >();
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}
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uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryInkMeasures( )
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{
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// TODO
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return uno::Sequence< geometry::RealRectangle2D >();
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}
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uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryMeasures( )
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{
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// TODO
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return uno::Sequence< geometry::RealRectangle2D >();
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}
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uno::Sequence< double > SAL_CALL TextLayout::queryLogicalAdvancements( )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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return maLogicalAdvancements;
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}
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void SAL_CALL TextLayout::applyLogicalAdvancements( const uno::Sequence< double >& aAdvancements )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if( aAdvancements.getLength() != maText.Length )
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{
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SAL_WARN("canvas.cairo", "TextLayout::applyLogicalAdvancements(): mismatching number of advancements" );
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throw lang::IllegalArgumentException();
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}
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maLogicalAdvancements = aAdvancements;
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}
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geometry::RealRectangle2D SAL_CALL TextLayout::queryTextBounds( )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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OutputDevice* pOutDev = mpRefDevice->getOutputDevice();
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if( !pOutDev )
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return geometry::RealRectangle2D();
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ScopedVclPtrInstance< VirtualDevice > pVDev( *pOutDev );
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pVDev->SetFont( mpFont->getVCLFont() );
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// need metrics for Y offset, the XCanvas always renders
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// relative to baseline
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const ::FontMetric& aMetric( pVDev->GetFontMetric() );
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setupLayoutMode( *pVDev, mnTextDirection );
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const sal_Int32 nAboveBaseline( -aMetric.GetAscent() );
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const sal_Int32 nBelowBaseline( aMetric.GetDescent() );
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if( maLogicalAdvancements.getLength() )
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{
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return geometry::RealRectangle2D( 0, nAboveBaseline,
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maLogicalAdvancements[ maLogicalAdvancements.getLength()-1 ],
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nBelowBaseline );
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}
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else
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{
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return geometry::RealRectangle2D( 0, nAboveBaseline,
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pVDev->GetTextWidth(
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maText.Text,
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::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
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::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) ),
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nBelowBaseline );
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}
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}
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double SAL_CALL TextLayout::justify( double /*nSize*/ )
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{
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// TODO
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return 0.0;
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}
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double SAL_CALL TextLayout::combinedJustify( const uno::Sequence< uno::Reference< rendering::XTextLayout > >& /*aNextLayouts*/,
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double /*nSize*/ )
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{
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// TODO
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return 0.0;
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}
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rendering::TextHit SAL_CALL TextLayout::getTextHit( const geometry::RealPoint2D& /*aHitPoint*/ )
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{
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// TODO
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return rendering::TextHit();
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}
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rendering::Caret SAL_CALL TextLayout::getCaret( sal_Int32 /*nInsertionIndex*/,
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sal_Bool /*bExcludeLigatures*/ )
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{
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// TODO
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return rendering::Caret();
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}
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sal_Int32 SAL_CALL TextLayout::getNextInsertionIndex( sal_Int32 /*nStartIndex*/,
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sal_Int32 /*nCaretAdvancement*/,
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sal_Bool /*bExcludeLigatures*/ )
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{
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// TODO
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return 0;
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}
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uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryVisualHighlighting( sal_Int32 /*nStartIndex*/,
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sal_Int32 /*nEndIndex*/ )
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{
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// TODO
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return uno::Reference< rendering::XPolyPolygon2D >();
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}
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uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryLogicalHighlighting( sal_Int32 /*nStartIndex*/,
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sal_Int32 /*nEndIndex*/ )
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{
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// TODO
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return uno::Reference< rendering::XPolyPolygon2D >();
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}
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double SAL_CALL TextLayout::getBaselineOffset( )
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{
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// TODO
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return 0.0;
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}
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sal_Int8 SAL_CALL TextLayout::getMainTextDirection( )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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return mnTextDirection;
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}
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uno::Reference< rendering::XCanvasFont > SAL_CALL TextLayout::getFont( )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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return mpFont.get();
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}
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rendering::StringContext SAL_CALL TextLayout::getText( )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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return maText;
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}
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/**
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* TextLayout::isCairoRenderable
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*
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* Features currently not supported by Cairo (VCL rendering is used as fallback):
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* - vertical glyphs
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*
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* @return true, if text/font can be rendered with cairo
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**/
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bool TextLayout::isCairoRenderable(SystemFontData aSysFontData) const
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{
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#if defined CAIRO_HAS_FT_FONT
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// is font usable?
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if (!aSysFontData.nFontId)
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return false;
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#endif
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// vertical glyph rendering is not supported in cairo for now
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if (aSysFontData.bVerticalCharacterType)
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{
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SAL_WARN("canvas.cairo", ":cairocanvas::TextLayout::isCairoRenderable(): Vertical Character Style not supported");
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return false;
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}
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return true;
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}
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/**
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* TextLayout::draw
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*
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* Cairo-based text rendering. Draw text directly on the cairo surface with cairo fonts.
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* Avoid using VCL VirtualDevices for that, bypassing VCL DrawText functions, when possible
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*
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* Note: some text effects are not rendered due to lacking generic canvas or cairo canvas
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* implementation. See issues 92657, 92658, 92659, 92660, 97529
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**/
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void TextLayout::draw( CairoSharedPtr const & pSCairo,
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OutputDevice& rOutDev,
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const Point& rOutpos,
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const rendering::ViewState& viewState,
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const rendering::RenderState& renderState ) const
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{
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::osl::MutexGuard aGuard( m_aMutex );
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SystemTextLayoutData aSysLayoutData;
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setupLayoutMode( rOutDev, mnTextDirection );
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// TODO(P2): cache that
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std::unique_ptr< long []> aOffsets(new long[maLogicalAdvancements.getLength()]);
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if( maLogicalAdvancements.getLength() )
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{
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setupTextOffsets( aOffsets.get(), maLogicalAdvancements, viewState, renderState );
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// TODO(F3): ensure correct length and termination for DX
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// array (last entry _must_ contain the overall width)
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}
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aSysLayoutData = rOutDev.GetSysTextLayoutData(rOutpos, maText.Text,
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::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
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::canvas::tools::numeric_cast<sal_uInt16>(maText.Length),
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maLogicalAdvancements.getLength() ? aOffsets.get() : nullptr);
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// Sort them so that all glyphs on the same glyph fallback level are consecutive
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std::sort(aSysLayoutData.rGlyphData.begin(), aSysLayoutData.rGlyphData.end(), compareFallbacks);
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bool bCairoRenderable = true;
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//Pull all the fonts we need to render the text
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typedef std::pair<SystemFontData,int> FontLevel;
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std::vector<FontLevel> aFontData;
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for (auto const& glyph : aSysLayoutData.rGlyphData)
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{
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if( aFontData.empty() || glyph.fallbacklevel != aFontData.back().second )
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{
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aFontData.emplace_back(rOutDev.GetSysFontData(glyph.fallbacklevel),
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glyph.fallbacklevel);
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if( !isCairoRenderable(aFontData.back().first) )
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{
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bCairoRenderable = false;
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SAL_INFO("canvas.cairo", ":cairocanvas::TextLayout::draw(S,O,p,v,r): VCL FALLBACK " <<
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(maLogicalAdvancements.getLength() ? "ADV " : "") <<
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(aFontData.back().first.bAntialias ? "AA " : "") <<
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(aFontData.back().first.bFakeBold ? "FB " : "") <<
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(aFontData.back().first.bFakeItalic ? "FI " : "") <<
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" - " <<
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maText.Text.copy( maText.StartPosition, maText.Length));
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break;
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}
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}
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}
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// The ::GetSysTextLayoutData(), i.e. layouting of text to glyphs can change the font being used.
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// The fallback checks need to be done after final font is known.
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if (!bCairoRenderable) // VCL FALLBACKS
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{
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if (maLogicalAdvancements.getLength()) // VCL FALLBACK - with glyph advances
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{
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rOutDev.DrawTextArray( rOutpos, maText.Text, aOffsets.get(),
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::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
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::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
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return;
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}
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else // VCL FALLBACK - without advances
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{
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rOutDev.DrawText( rOutpos, maText.Text,
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::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
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::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
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return;
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}
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}
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if (aSysLayoutData.rGlyphData.empty())
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return; //??? false?
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/**
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* Setup platform independent glyph vector into cairo-based glyphs vector.
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**/
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// Loop through the fonts used and render the matching glyphs for each
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for (auto const& elemFontData : aFontData)
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{
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const SystemFontData &rSysFontData = elemFontData.first;
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// setup glyphs
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std::vector<cairo_glyph_t> cairo_glyphs;
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cairo_glyphs.reserve( 256 );
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for (auto const& systemGlyph : aSysLayoutData.rGlyphData)
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{
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if( systemGlyph.fallbacklevel != elemFontData.second )
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continue;
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cairo_glyph_t aGlyph;
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aGlyph.index = systemGlyph.index;
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aGlyph.x = systemGlyph.x;
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aGlyph.y = systemGlyph.y;
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cairo_glyphs.push_back(aGlyph);
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}
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if (cairo_glyphs.empty())
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continue;
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const vcl::Font& aFont = rOutDev.GetFont();
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long nWidth = aFont.GetAverageFontWidth();
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long nHeight = aFont.GetFontHeight();
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if (nWidth == 0)
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nWidth = nHeight;
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if (nWidth == 0 || nHeight == 0)
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continue;
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/**
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* Setup font
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**/
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cairo_font_face_t* font_face = nullptr;
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#if defined CAIRO_HAS_FT_FONT
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font_face = cairo_ft_font_face_create_for_ft_face(static_cast<FT_Face>(rSysFontData.nFontId),
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rSysFontData.nFontFlags);
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#else
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# error Native API needed.
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#endif
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cairo_set_font_face( pSCairo.get(), font_face);
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// create default font options. cairo_get_font_options() does not retrieve the surface defaults,
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// only what has been set before with cairo_set_font_options()
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cairo_font_options_t* options = cairo_font_options_create();
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if (rSysFontData.bAntialias)
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{
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// CAIRO_ANTIALIAS_GRAY provides more similar result to VCL Canvas,
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// so we're not using CAIRO_ANTIALIAS_SUBPIXEL
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cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY);
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}
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cairo_set_font_options( pSCairo.get(), options);
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// Font color
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Color aTextColor = rOutDev.GetTextColor();
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cairo_set_source_rgb(pSCairo.get(),
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aTextColor.GetRed()/255.0,
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aTextColor.GetGreen()/255.0,
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aTextColor.GetBlue()/255.0);
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// Font rotation and scaling
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cairo_matrix_t m;
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cairo_matrix_init_identity(&m);
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if (aSysLayoutData.orientation)
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cairo_matrix_rotate(&m, (3600 - aSysLayoutData.orientation) * M_PI / 1800.0);
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cairo_matrix_scale(&m, nWidth, nHeight);
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//faux italics
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if (rSysFontData.bFakeItalic)
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m.xy = -m.xx * 0x6000 / 0x10000;
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cairo_set_font_matrix(pSCairo.get(), &m);
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SAL_INFO(
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"canvas.cairo",
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"Size:(" << aFont.GetAverageFontWidth() << "," << aFont.GetFontHeight()
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<< "), Pos (" << rOutpos.X() << "," << rOutpos.Y()
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<< "), G("
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<< (!cairo_glyphs.empty() ? cairo_glyphs[0].index : -1)
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<< ","
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<< (cairo_glyphs.size() > 1 ? cairo_glyphs[1].index : -1)
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<< ","
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<< (cairo_glyphs.size() > 2 ? cairo_glyphs[2].index : -1)
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<< ") " << (maLogicalAdvancements.getLength() ? "ADV " : "")
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<< (rSysFontData.bAntialias ? "AA " : "")
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<< (rSysFontData.bFakeBold ? "FB " : "")
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<< (rSysFontData.bFakeItalic ? "FI " : "") << " || Name:"
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<< aFont.GetFamilyName() << " - "
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<< maText.Text.copy(maText.StartPosition, maText.Length));
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cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
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//faux bold
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if (rSysFontData.bFakeBold)
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{
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double bold_dx = 0.5 * sqrt( 0.7 * aFont.GetFontHeight() );
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int total_steps = 1 * static_cast<int>(bold_dx + 0.5);
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// loop to draw the text for every half pixel of displacement
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for (int nSteps = 0; nSteps < total_steps; nSteps++)
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{
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for(cairo_glyph_t & cairo_glyph : cairo_glyphs)
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{
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cairo_glyph.x += (bold_dx * nSteps / total_steps) / 4;
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cairo_glyph.y -= (bold_dx * nSteps / total_steps) / 4;
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}
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cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
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}
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SAL_INFO("canvas.cairo",":cairocanvas::TextLayout::draw(S,O,p,v,r): FAKEBOLD - dx:" << static_cast<int>(bold_dx));
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|
}
|
|
|
|
cairo_font_face_destroy(font_face);
|
|
cairo_font_options_destroy(options);
|
|
}
|
|
}
|
|
|
|
namespace
|
|
{
|
|
class OffsetTransformer
|
|
{
|
|
public:
|
|
explicit OffsetTransformer( const ::basegfx::B2DHomMatrix& rMat ) :
|
|
maMatrix( rMat )
|
|
{
|
|
}
|
|
|
|
sal_Int32 operator()( const double& rOffset )
|
|
{
|
|
// This is an optimization of the normal rMat*[x,0]
|
|
// transformation of the advancement vector (in x
|
|
// direction), followed by a length calculation of the
|
|
// resulting vector: advancement' =
|
|
// ||rMat*[x,0]||. Since advancements are vectors, we
|
|
// can ignore translational components, thus if [x,0],
|
|
// it follows that rMat*[x,0]=[x',0] holds. Thus, we
|
|
// just have to calc the transformation of the x
|
|
// component.
|
|
|
|
// TODO(F2): Handle non-horizontal advancements!
|
|
return ::basegfx::fround( hypot(maMatrix.get(0,0)*rOffset,
|
|
maMatrix.get(1,0)*rOffset) );
|
|
}
|
|
|
|
private:
|
|
::basegfx::B2DHomMatrix maMatrix;
|
|
};
|
|
}
|
|
|
|
void TextLayout::setupTextOffsets( long* outputOffsets,
|
|
const uno::Sequence< double >& inputOffsets,
|
|
const rendering::ViewState& viewState,
|
|
const rendering::RenderState& renderState ) const
|
|
{
|
|
ENSURE_OR_THROW( outputOffsets!=nullptr,
|
|
"TextLayout::setupTextOffsets offsets NULL" );
|
|
|
|
::basegfx::B2DHomMatrix aMatrix;
|
|
|
|
::canvas::tools::mergeViewAndRenderTransform(aMatrix,
|
|
viewState,
|
|
renderState);
|
|
|
|
// fill integer offsets
|
|
std::transform( inputOffsets.begin(),
|
|
inputOffsets.end(),
|
|
outputOffsets,
|
|
OffsetTransformer( aMatrix ) );
|
|
}
|
|
|
|
OUString SAL_CALL TextLayout::getImplementationName()
|
|
{
|
|
return OUString( "CairoCanvas::TextLayout" );
|
|
}
|
|
|
|
sal_Bool SAL_CALL TextLayout::supportsService( const OUString& ServiceName )
|
|
{
|
|
return cppu::supportsService( this, ServiceName );
|
|
}
|
|
|
|
uno::Sequence< OUString > SAL_CALL TextLayout::getSupportedServiceNames()
|
|
{
|
|
return { "com.sun.star.rendering.TextLayout" };
|
|
}
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|