canvas/source/cairo/cairo_canvasfont.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <canvas/debug.hxx>
  21
  22 #include <com/sun/star/rendering/PanoseProportion.hpp>
  23 #include <cppuhelper/supportsservice.hxx>
  24
  25 #include <rtl/math.hxx>
  26 #include <basegfx/numeric/ftools.hxx>
  27
  28 #include <vcl/metric.hxx>
  29 #include <i18nlangtag/languagetag.hxx>
  30
  31 #include "cairo_canvasfont.hxx"
  32 #include "cairo_textlayout.hxx"
  33
  34 using namespace ::com::sun::star;
  35
  36 namespace cairocanvas
  37 {
  38
  39     CanvasFont::CanvasFont( const rendering::FontRequest&                   rFontRequest,
  40                             const uno::Sequence< beans::PropertyValue >&    /*rExtraFontProperties*/,
  41                             const geometry::Matrix2D&                       rFontMatrix,
  42                             const SurfaceProviderRef&                       rDevice ) :
  43         CanvasFont_Base( m_aMutex ),
  44         maFont( vcl::Font( rFontRequest.FontDescription.FamilyName,
  45                       rFontRequest.FontDescription.StyleName,
  46                       Size( 0, ::basegfx::fround(rFontRequest.CellSize) ) ) ),
  47         maFontRequest( rFontRequest ),
  48         mpRefDevice( rDevice )
  49     {
  50         maFont->SetAlign( ALIGN_BASELINE );
  51         maFont->SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==com::sun::star::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
  52         maFont->SetVertical( rFontRequest.FontDescription.IsVertical==com::sun::star::util::TriState_YES );
  53
  54         // TODO(F2): improve panose->vclenum conversion
  55         maFont->SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
  56         maFont->SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
  57         maFont->SetPitch(
  58                 rFontRequest.FontDescription.FontDescription.Proportion == rendering::PanoseProportion::MONO_SPACED
  59                     ? PITCH_FIXED : PITCH_VARIABLE);
  60
  61         maFont->SetLanguage( LanguageTag::convertToLanguageType( rFontRequest.Locale, false));
  62
  63         // adjust to stretched/shrunk font
  64         if( !::rtl::math::approxEqual( rFontMatrix.m00, rFontMatrix.m11) )
  65         {
  66             VclPtr<OutputDevice> pOutDev( mpRefDevice->getOutputDevice() );
  67
  68             if( pOutDev )
  69             {
  70                 const bool bOldMapState( pOutDev->IsMapModeEnabled() );
  71                 pOutDev->EnableMapMode(false);
  72
  73                 const Size aSize = pOutDev->GetFontMetric( *maFont ).GetSize();
  74
  75                 const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
  76                 double fStretch = (rFontMatrix.m00 + rFontMatrix.m01);
  77
  78                 if( !::basegfx::fTools::equalZero( fDividend) )
  79                     fStretch /= fDividend;
  80
  81                 const long nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
  82
  83                 maFont->SetWidth( nNewWidth );
  84
  85                 pOutDev->EnableMapMode(bOldMapState);
  86             }
  87         }
  88     }
  89
  90     void SAL_CALL CanvasFont::disposing()
  91     {
  92         SolarMutexGuard aGuard;
  93
  94         mpRefDevice.clear();
  95     }
  96
  97     uno::Reference< rendering::XTextLayout > SAL_CALL  CanvasFont::createTextLayout( const rendering::StringContext& aText, sal_Int8 nDirection, sal_Int64 nRandomSeed ) throw (uno::RuntimeException, std::exception)
  98     {
  99         SolarMutexGuard aGuard;
 100
 101         if( !mpRefDevice.is() )
 102             return uno::Reference< rendering::XTextLayout >(); // we're disposed
 103
 104         return new TextLayout( aText,
 105                                nDirection,
 106                                nRandomSeed,
 107                                Reference( this ),
 108                                mpRefDevice );
 109     }
 110
 111     rendering::FontRequest SAL_CALL  CanvasFont::getFontRequest(  ) throw (uno::RuntimeException, std::exception)
 112     {
 113         SolarMutexGuard aGuard;
 114
 115         return maFontRequest;
 116     }
 117
 118     rendering::FontMetrics SAL_CALL  CanvasFont::getFontMetrics(  ) throw (uno::RuntimeException, std::exception)
 119     {
 120         SolarMutexGuard aGuard;
 121
 122         // TODO(F1)
 123         return rendering::FontMetrics();
 124     }
 125
 126     uno::Sequence< double > SAL_CALL  CanvasFont::getAvailableSizes(  ) throw (uno::RuntimeException, std::exception)
 127     {
 128         SolarMutexGuard aGuard;
 129
 130         // TODO(F1)
 131         return uno::Sequence< double >();
 132     }
 133
 134     uno::Sequence< beans::PropertyValue > SAL_CALL  CanvasFont::getExtraFontProperties(  ) throw (uno::RuntimeException, std::exception)
 135     {
 136         SolarMutexGuard aGuard;
 137
 138         // TODO(F1)
 139         return uno::Sequence< beans::PropertyValue >();
 140     }
 141
 142     OUString SAL_CALL CanvasFont::getImplementationName() throw( uno::RuntimeException, std::exception )
 143     {
 144         return OUString( "CairoCanvas::CanvasFont" );
 145     }
 146
 147     sal_Bool SAL_CALL CanvasFont::supportsService( const OUString& ServiceName ) throw( uno::RuntimeException, std::exception )
 148     {
 149         return cppu::supportsService( this, ServiceName );
 150     }
 151
 152     uno::Sequence< OUString > SAL_CALL CanvasFont::getSupportedServiceNames()  throw( uno::RuntimeException, std::exception )
 153     {
 154         uno::Sequence< OUString > aRet(1);
 155         aRet[0] = "com.sun.star.rendering.CanvasFont";
 156
 157         return aRet;
 158     }
 159
 160     vcl::Font CanvasFont::getVCLFont() const
 161     {
 162         return *maFont;
 163     }
 164 }
 165
 166 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */