697 lines
27 KiB
C++
697 lines
27 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_canvas.hxx"
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#include <math.h>
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#include <canvas/debug.hxx>
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#include <canvas/verbosetrace.hxx>
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#include <tools/diagnose_ex.h>
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#include <vcl/metric.hxx>
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#include <vcl/virdev.hxx>
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#ifdef WNT
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#include <tools/prewin.h>
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#include <windows.h>
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#include <tools/postwin.h>
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#ifdef max
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#undef max
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#endif
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#ifdef min
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#undef min
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#endif
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#endif
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#include <vcl/sysdata.hxx>
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#include <basegfx/matrix/b2dhommatrix.hxx>
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#include <basegfx/numeric/ftools.hxx>
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#include <boost/scoped_array.hpp>
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#include "cairo_textlayout.hxx"
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#include "cairo_spritecanvas.hxx"
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#ifdef CAIRO_HAS_QUARTZ_SURFACE
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# include "cairo_quartz_cairo.hxx"
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#elif defined CAIRO_HAS_WIN32_SURFACE
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# include "cairo_win32_cairo.hxx"
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# include <cairo-win32.h>
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#elif defined CAIRO_HAS_XLIB_SURFACE
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# include "cairo_xlib_cairo.hxx"
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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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sal_uLong nLayoutMode;
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switch( nTextDirection )
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{
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default:
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nLayoutMode = 0;
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break;
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case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
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nLayoutMode = TEXT_LAYOUT_BIDI_LTR;
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break;
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case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
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nLayoutMode = TEXT_LAYOUT_BIDI_LTR | TEXT_LAYOUT_BIDI_STRONG;
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break;
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case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
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nLayoutMode = TEXT_LAYOUT_BIDI_RTL;
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break;
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case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
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nLayoutMode = TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
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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 | TEXT_LAYOUT_TEXTORIGIN_LEFT );
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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.reset();
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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( ) throw (uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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( ) throw (uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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( ) throw (uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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( ) throw (uno::RuntimeException)
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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 ) throw (lang::IllegalArgumentException, uno::RuntimeException)
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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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OSL_TRACE( "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( ) throw (uno::RuntimeException)
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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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VirtualDevice aVDev( *pOutDev );
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aVDev.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( aVDev.GetFontMetric() );
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setupLayoutMode( aVDev, mnTextDirection );
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const sal_Int32 nAboveBaseline( -aMetric.GetIntLeading() - 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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aVDev.GetTextWidth(
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maText.Text,
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::canvas::tools::numeric_cast<USHORT>(maText.StartPosition),
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::canvas::tools::numeric_cast<USHORT>(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*/ ) throw (lang::IllegalArgumentException, uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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*/ ) throw (lang::IllegalArgumentException, uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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*/ ) throw (uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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( ) throw (uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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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( ) throw (uno::RuntimeException)
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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( ) throw (uno::RuntimeException)
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{
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::osl::MutexGuard aGuard( m_aMutex );
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return mpFont.getRef();
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}
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rendering::StringContext SAL_CALL TextLayout::getText( ) throw (uno::RuntimeException)
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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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void TextLayout::useFont( Cairo* pCairo )
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{
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rendering::FontRequest aFontRequest = mpFont->getFontRequest();
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rendering::FontInfo aFontInfo = aFontRequest.FontDescription;
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cairo_select_font_face( pCairo, ::rtl::OUStringToOString( aFontInfo.FamilyName, RTL_TEXTENCODING_UTF8 ), CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL );
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cairo_set_font_size( pCairo, aFontRequest.CellSize );
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}
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/** TextLayout:draw
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*
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* This function uses the "toy" api of the cairo library
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*
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**/
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bool TextLayout::draw( Cairo* pCairo )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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::rtl::OUString aSubText = maText.Text.copy( maText.StartPosition, maText.Length );
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::rtl::OString aUTF8String = ::rtl::OUStringToOString( aSubText, RTL_TEXTENCODING_UTF8 );
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cairo_save( pCairo );
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/* move to 0, 0 as cairo_show_text advances current point and current point is not restored by cairo_restore.
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before we were depending on unmodified current point which I believed was preserved by save/restore */
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cairo_move_to( pCairo, 0, 0 );
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useFont( pCairo );
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cairo_show_text( pCairo, aUTF8String );
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cairo_restore( pCairo );
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return true;
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}
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/**
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* TextLayout::isCairoRenderable
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*
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* Features currenly 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 UNX && !defined QUARTZ
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// is font usable?
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if (!aSysFontData.nFontId) 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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OSL_TRACE(":cairocanvas::TextLayout::isCairoRenderable(): ***************** VERTICAL CHARACTER STYLE!!! ****************");
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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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* @return true, if successful
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**/
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bool TextLayout::draw( SurfaceSharedPtr& pSurface,
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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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#if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1)
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LOGFONTW logfont;
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#endif
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setupLayoutMode( rOutDev, mnTextDirection );
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// TODO(P2): cache that
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::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[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<USHORT>(maText.StartPosition),
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::canvas::tools::numeric_cast<USHORT>(maText.Length),
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maLogicalAdvancements.getLength() ? aOffsets.get() : NULL);
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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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typedef std::vector<FontLevel> FontLevelVector;
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FontLevelVector aFontData;
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SystemGlyphDataVector::const_iterator aIter=aSysLayoutData.rGlyphData.begin();
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const SystemGlyphDataVector::const_iterator aEnd=aSysLayoutData.rGlyphData.end();
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for( ; aIter != aEnd; ++aIter )
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{
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if( aFontData.empty() || aIter->fallbacklevel != aFontData.back().second )
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{
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aFontData.push_back(FontLevel(rOutDev.GetSysFontData(aIter->fallbacklevel),
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aIter->fallbacklevel));
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if( !isCairoRenderable(aFontData.back().first) )
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{
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bCairoRenderable = false;
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OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): VCL FALLBACK %s%s%s%s - %s",
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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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::rtl::OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ),
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RTL_TEXTENCODING_UTF8 ).getStr());
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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<USHORT>(maText.StartPosition),
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::canvas::tools::numeric_cast<USHORT>(maText.Length) );
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return true;
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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<USHORT>(maText.StartPosition),
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::canvas::tools::numeric_cast<USHORT>(maText.Length) );
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return true;
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}
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}
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if (aSysLayoutData.rGlyphData.empty()) return false; //??? 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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FontLevelVector::const_iterator aFontDataIter = aFontData.begin();
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const FontLevelVector::const_iterator aFontDataEnd = aFontData.end();
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for( ; aFontDataIter != aFontDataEnd; ++aFontDataIter )
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{
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const SystemFontData &rSysFontData = aFontDataIter->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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SystemGlyphDataVector::const_iterator aIter=aSysLayoutData.rGlyphData.begin();
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const SystemGlyphDataVector::const_iterator aEnd=aSysLayoutData.rGlyphData.end();
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for( ; aIter != aEnd; ++aIter )
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{
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SystemGlyphData systemGlyph = *aIter;
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if( systemGlyph.fallbacklevel != aFontDataIter->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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#ifdef CAIRO_HAS_WIN32_SURFACE
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// Cairo requires standard glyph indexes (ETO_GLYPH_INDEX), while vcl/win/* uses ucs4 chars.
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// Convert to standard indexes
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aGlyph.index = cairo::ucs4toindex((unsigned int) aGlyph.index, rSysFontData.hFont);
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#endif
|
|
aGlyph.x = systemGlyph.x;
|
|
aGlyph.y = systemGlyph.y;
|
|
cairo_glyphs.push_back(aGlyph);
|
|
}
|
|
|
|
if (cairo_glyphs.empty())
|
|
continue;
|
|
|
|
/**
|
|
* Setup font
|
|
**/
|
|
cairo_font_face_t* font_face = NULL;
|
|
|
|
#ifdef CAIRO_HAS_QUARTZ_SURFACE
|
|
// TODO: use cairo_quartz_font_face_create_for_cgfont(cgFont)
|
|
// when CGFont (Mac OS X 10.5 API) is provided by the AQUA VCL backend.
|
|
font_face = cairo_quartz_font_face_create_for_atsu_font_id((ATSUFontID) rSysFontData.aATSUFontID);
|
|
|
|
#elif defined CAIRO_HAS_WIN32_SURFACE
|
|
#if (OSL_DEBUG_LEVEL > 1)
|
|
GetObjectW( rSysFontData.hFont, sizeof(logfont), &logfont );
|
|
#endif
|
|
// Note: cairo library uses logfont fallbacks when lfEscapement, lfOrientation and lfWidth are not zero.
|
|
// VCL always has non-zero value for lfWidth
|
|
font_face = cairo_win32_font_face_create_for_hfont(rSysFontData.hFont);
|
|
|
|
#elif defined CAIRO_HAS_XLIB_SURFACE
|
|
font_face = cairo_ft_font_face_create_for_ft_face((FT_Face)rSysFontData.nFontId,
|
|
rSysFontData.nFontFlags);
|
|
#else
|
|
# error Native API needed.
|
|
#endif
|
|
|
|
CairoSharedPtr pSCairo = pSurface->getCairo();
|
|
|
|
cairo_set_font_face( pSCairo.get(), font_face);
|
|
|
|
// create default font options. cairo_get_font_options() does not retrieve the surface defaults,
|
|
// only what has been set before with cairo_set_font_options()
|
|
cairo_font_options_t* options = cairo_font_options_create();
|
|
if (rSysFontData.bAntialias) {
|
|
// CAIRO_ANTIALIAS_GRAY provides more similar result to VCL Canvas,
|
|
// so we're not using CAIRO_ANTIALIAS_SUBPIXEL
|
|
cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY);
|
|
}
|
|
cairo_set_font_options( pSCairo.get(), options);
|
|
|
|
// Font color
|
|
Color mTextColor = rOutDev.GetTextColor();
|
|
cairo_set_source_rgb(pSCairo.get(),
|
|
mTextColor.GetRed()/255.0,
|
|
mTextColor.GetGreen()/255.0,
|
|
mTextColor.GetBlue()/255.0);
|
|
|
|
// Font rotation and scaling
|
|
cairo_matrix_t m;
|
|
Font aFont = rOutDev.GetFont();
|
|
FontMetric aMetric( rOutDev.GetFontMetric(aFont) );
|
|
long nWidth = 0;
|
|
|
|
// width calculation is deep magic and platform/font dependant.
|
|
// width == 0 means no scaling, and usually width == height means the same.
|
|
// Other values mean horizontal scaling (narrow or stretching)
|
|
// see issue #101566
|
|
|
|
//proper scale calculation across platforms
|
|
if (aFont.GetWidth() == 0) {
|
|
nWidth = aFont.GetHeight();
|
|
} else {
|
|
// any scaling needs to be relative to the platform-dependent definition
|
|
// of height of the font
|
|
nWidth = aFont.GetWidth() * aFont.GetHeight() / aMetric.GetHeight();
|
|
}
|
|
|
|
cairo_matrix_init_identity(&m);
|
|
|
|
if (aSysLayoutData.orientation) cairo_matrix_rotate(&m, (3600 - aSysLayoutData.orientation) * M_PI / 1800.0);
|
|
|
|
cairo_matrix_scale(&m, nWidth, aFont.GetHeight());
|
|
|
|
//faux italics
|
|
if (rSysFontData.bFakeItalic) m.xy = -m.xx * 0x6000L / 0x10000L;
|
|
|
|
cairo_set_font_matrix(pSCairo.get(), &m);
|
|
|
|
OSL_TRACE("\r\n:cairocanvas::TextLayout::draw(S,O,p,v,r): Size:(%d,%d), W:%d->%d, Pos (%d,%d), G(%d,%d,%d) %s%s%s%s || Name:%s - %s",
|
|
aFont.GetWidth(),
|
|
aFont.GetHeight(),
|
|
aMetric.GetWidth(),
|
|
nWidth,
|
|
(int) rOutpos.X(),
|
|
(int) rOutpos.Y(),
|
|
cairo_glyphs[0].index, cairo_glyphs[1].index, cairo_glyphs[2].index,
|
|
maLogicalAdvancements.getLength() ? "ADV " : "",
|
|
rSysFontData.bAntialias ? "AA " : "",
|
|
rSysFontData.bFakeBold ? "FB " : "",
|
|
rSysFontData.bFakeItalic ? "FI " : "",
|
|
#if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1)
|
|
::rtl::OUStringToOString( reinterpret_cast<const sal_Unicode*> (logfont.lfFaceName), RTL_TEXTENCODING_UTF8 ).getStr(),
|
|
#else
|
|
::rtl::OUStringToOString( aFont.GetName(), RTL_TEXTENCODING_UTF8 ).getStr(),
|
|
#endif
|
|
::rtl::OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ),
|
|
RTL_TEXTENCODING_UTF8 ).getStr()
|
|
);
|
|
|
|
cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
|
|
|
|
//faux bold
|
|
if (rSysFontData.bFakeBold) {
|
|
double bold_dx = 0.5 * sqrt( 0.7 * aFont.GetHeight() );
|
|
int total_steps = 2 * ((int) (bold_dx + 0.5));
|
|
|
|
// loop to draw the text for every half pixel of displacement
|
|
for (int nSteps = 0; nSteps < total_steps; nSteps++) {
|
|
for(int nGlyphIdx = 0; nGlyphIdx < (int) cairo_glyphs.size(); nGlyphIdx++) {
|
|
cairo_glyphs[nGlyphIdx].x += bold_dx * nSteps / total_steps;
|
|
}
|
|
cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
|
|
}
|
|
OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): FAKEBOLD - dx:%d", (int) bold_dx);
|
|
}
|
|
|
|
cairo_restore( pSCairo.get() );
|
|
cairo_font_face_destroy(font_face);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
class OffsetTransformer
|
|
{
|
|
public:
|
|
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( sal_Int32* outputOffsets,
|
|
const uno::Sequence< double >& inputOffsets,
|
|
const rendering::ViewState& viewState,
|
|
const rendering::RenderState& renderState ) const
|
|
{
|
|
ENSURE_OR_THROW( outputOffsets!=NULL,
|
|
"TextLayout::setupTextOffsets offsets NULL" );
|
|
|
|
::basegfx::B2DHomMatrix aMatrix;
|
|
|
|
::canvas::tools::mergeViewAndRenderTransform(aMatrix,
|
|
viewState,
|
|
renderState);
|
|
|
|
// fill integer offsets
|
|
::std::transform( const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray(),
|
|
const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray()+inputOffsets.getLength(),
|
|
outputOffsets,
|
|
OffsetTransformer( aMatrix ) );
|
|
}
|
|
|
|
#define SERVICE_NAME "com.sun.star.rendering.TextLayout"
|
|
#define IMPLEMENTATION_NAME "CairoCanvas::TextLayout"
|
|
|
|
::rtl::OUString SAL_CALL TextLayout::getImplementationName() throw( uno::RuntimeException )
|
|
{
|
|
return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( IMPLEMENTATION_NAME ) );
|
|
}
|
|
|
|
sal_Bool SAL_CALL TextLayout::supportsService( const ::rtl::OUString& ServiceName ) throw( uno::RuntimeException )
|
|
{
|
|
return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( SERVICE_NAME ) );
|
|
}
|
|
|
|
uno::Sequence< ::rtl::OUString > SAL_CALL TextLayout::getSupportedServiceNames() throw( uno::RuntimeException )
|
|
{
|
|
uno::Sequence< ::rtl::OUString > aRet(1);
|
|
aRet[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) );
|
|
|
|
return aRet;
|
|
}
|
|
}
|