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
  24 #include <rtl/math.hxx>
  25 #include <basegfx/numeric/ftools.hxx>
  26
  27 #include <vcl/metric.hxx>
  28 #include <i18nlangtag/languagetag.hxx>
  29
  30 #include "cairo_canvasfont.hxx"
  31 #include "cairo_textlayout.hxx"
  32
  33 using namespace ::com::sun::star;
  34
  35 namespace cairocanvas
  36 {
  37
  38     CanvasFont::CanvasFont( const rendering::FontRequest&                   rFontRequest,
  39                             const uno::Sequence< beans::PropertyValue >&    /*rExtraFontProperties*/,
  40                             const geometry::Matrix2D&                       rFontMatrix,
  41                             const SurfaceProviderRef&                       rDevice ) :
  42         CanvasFont_Base( m_aMutex ),
  43         maFont( Font( rFontRequest.FontDescription.FamilyName,
  44                       rFontRequest.FontDescription.StyleName,
  45                       Size( 0, ::basegfx::fround(rFontRequest.CellSize) ) ) ),
  46         maFontRequest( rFontRequest ),
  47         mpRefDevice( rDevice )
  48     {
  49         maFont->SetAlign( ALIGN_BASELINE );
  50         maFont->SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==com::sun::star::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
  51         maFont->SetVertical( (rFontRequest.FontDescription.IsVertical==com::sun::star::util::TriState_YES) ? sal_True : sal_False );
  52
  53         // TODO(F2): improve panose->vclenum conversion
  54         maFont->SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
  55         maFont->SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
  56         maFont->SetPitch(
  57                 rFontRequest.FontDescription.FontDescription.Proportion == rendering::PanoseProportion::MONO_SPACED
  58                     ? PITCH_FIXED : PITCH_VARIABLE);
  59
  60         maFont->SetLanguage( LanguageTag( rFontRequest.Locale).getLanguageType( false));
  61
  62         // adjust to stretched/shrinked font
  63         if( !::rtl::math::approxEqual( rFontMatrix.m00, rFontMatrix.m11) )
  64         {
  65             OutputDevice* pOutDev( mpRefDevice->getOutputDevice() );
  66
  67             if( pOutDev )
  68             {
  69                 const bool bOldMapState( pOutDev->IsMapModeEnabled() );
  70                 pOutDev->EnableMapMode(sal_False);
  71
  72                 const Size aSize = pOutDev->GetFontMetric( *maFont ).GetSize();
  73
  74                 const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
  75                 double fStretch = (rFontMatrix.m00 + rFontMatrix.m01);
  76
  77                 if( !::basegfx::fTools::equalZero( fDividend) )
  78                     fStretch /= fDividend;
  79
  80                 const long nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
  81
  82                 maFont->SetWidth( nNewWidth );
  83
  84                 pOutDev->EnableMapMode(bOldMapState);
  85             }
  86         }
  87     }
  88
  89     void SAL_CALL CanvasFont::disposing()
  90     {
  91         SolarMutexGuard aGuard;
  92
  93         mpRefDevice.clear();
  94     }
  95
  96     uno::Reference< rendering::XTextLayout > SAL_CALL  CanvasFont::createTextLayout( const rendering::StringContext& aText, sal_Int8 nDirection, sal_Int64 nRandomSeed ) throw (uno::RuntimeException)
  97     {
  98         SolarMutexGuard aGuard;
  99
 100         if( !mpRefDevice.is() )
 101             return uno::Reference< rendering::XTextLayout >(); // we're disposed
 102
 103         return new TextLayout( aText,
 104                                nDirection,
 105                                nRandomSeed,
 106                                Reference( this ),
 107                                mpRefDevice );
 108     }
 109
 110     rendering::FontRequest SAL_CALL  CanvasFont::getFontRequest(  ) throw (uno::RuntimeException)
 111     {
 112         SolarMutexGuard aGuard;
 113
 114         return maFontRequest;
 115     }
 116
 117     rendering::FontMetrics SAL_CALL  CanvasFont::getFontMetrics(  ) throw (uno::RuntimeException)
 118     {
 119         SolarMutexGuard aGuard;
 120
 121         // TODO(F1)
 122         return rendering::FontMetrics();
 123     }
 124
 125     uno::Sequence< double > SAL_CALL  CanvasFont::getAvailableSizes(  ) throw (uno::RuntimeException)
 126     {
 127         SolarMutexGuard aGuard;
 128
 129         // TODO(F1)
 130         return uno::Sequence< double >();
 131     }
 132
 133     uno::Sequence< beans::PropertyValue > SAL_CALL  CanvasFont::getExtraFontProperties(  ) throw (uno::RuntimeException)
 134     {
 135         SolarMutexGuard aGuard;
 136
 137         // TODO(F1)
 138         return uno::Sequence< beans::PropertyValue >();
 139     }
 140
 141 #define IMPLEMENTATION_NAME "CairoCanvas::CanvasFont"
 142 #define SERVICE_NAME "com.sun.star.rendering.CanvasFont"
 143
 144     OUString SAL_CALL CanvasFont::getImplementationName() throw( uno::RuntimeException )
 145     {
 146         return OUString( IMPLEMENTATION_NAME );
 147     }
 148
 149     sal_Bool SAL_CALL CanvasFont::supportsService( const OUString& ServiceName ) throw( uno::RuntimeException )
 150     {
 151         return ServiceName == SERVICE_NAME;
 152     }
 153
 154     uno::Sequence< OUString > SAL_CALL CanvasFont::getSupportedServiceNames()  throw( uno::RuntimeException )
 155     {
 156         uno::Sequence< OUString > aRet(1);
 157         aRet[0] = SERVICE_NAME;
 158
 159         return aRet;
 160     }
 161
 162     ::Font CanvasFont::getVCLFont() const
 163     {
 164         return *maFont;
 165     }
 166 }
 167
 168 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */