canvas/source/cairo/cairo_canvasfont.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: cairo_canvasfont.cxx,v $
  10  * $Revision: 1.8 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_canvas.hxx"
  33
  34 #include <canvas/debug.hxx>
  35
  36 #include <rtl/math.hxx>
  37 #include <basegfx/numeric/ftools.hxx>
  38
  39 #include <vcl/metric.hxx>
  40 #include <i18npool/mslangid.hxx>
  41
  42 #include "cairo_canvasfont.hxx"
  43 #include "cairo_textlayout.hxx"
  44
  45 using namespace ::com::sun::star;
  46
  47 namespace cairocanvas
  48 {
  49     namespace
  50     {
  51         // Little helper to encapsulate locking into policy class
  52         class LocalGuard
  53         {
  54         public:
  55             LocalGuard() :
  56                 aGuard( Application::GetSolarMutex() )
  57             {
  58             }
  59
  60             /// To be compatible with CanvasBase mutex concept
  61             LocalGuard( const ::osl::Mutex& ) :
  62                 aGuard( Application::GetSolarMutex() )
  63             {
  64             }
  65
  66         private:
  67             ::vos::OGuard aGuard;
  68         };
  69     }
  70
  71     CanvasFont::CanvasFont( const rendering::FontRequest&                                       rFontRequest,
  72                             const uno::Sequence< beans::PropertyValue >&        /*rExtraFontProperties*/,
  73                             const geometry::Matrix2D&                                           rFontMatrix,
  74                             const SurfaceProviderRef&                                           rDevice ) :
  75         CanvasFont_Base( m_aMutex ),
  76         maFont( Font( rFontRequest.FontDescription.FamilyName,
  77                       rFontRequest.FontDescription.StyleName,
  78                       Size( 0, ::basegfx::fround(rFontRequest.CellSize) ) ) ),
  79         maFontRequest( rFontRequest ),
  80         mpRefDevice( rDevice )
  81     {
  82         maFont->SetAlign( ALIGN_BASELINE );
  83         maFont->SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==com::sun::star::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
  84         maFont->SetVertical( (rFontRequest.FontDescription.IsVertical==com::sun::star::util::TriState_YES) ? TRUE : FALSE );
  85
  86         // TODO(F2): improve panose->vclenum conversion
  87         maFont->SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
  88         maFont->SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
  89
  90         maFont->SetLanguage(MsLangId::convertLocaleToLanguage(rFontRequest.Locale));
  91
  92         // adjust to stretched/shrinked font
  93         if( !::rtl::math::approxEqual( rFontMatrix.m00, rFontMatrix.m11) )
  94         {
  95             OutputDevice* pOutDev( mpRefDevice->getOutputDevice() );
  96
  97             if( pOutDev )
  98             {
  99                 const bool bOldMapState( pOutDev->IsMapModeEnabled() );
 100                 pOutDev->EnableMapMode(FALSE);
 101
 102                 const Size aSize = pOutDev->GetFontMetric( *maFont ).GetSize();
 103
 104                 const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
 105                 double fStretch = (rFontMatrix.m00 + rFontMatrix.m01);
 106
 107                 if( !::basegfx::fTools::equalZero( fDividend) )
 108                     fStretch /= fDividend;
 109
 110                 const long nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
 111
 112                 maFont->SetWidth( nNewWidth );
 113
 114                 pOutDev->EnableMapMode(bOldMapState);
 115             }
 116         }
 117     }
 118
 119     void SAL_CALL CanvasFont::disposing()
 120     {
 121         LocalGuard aGuard;
 122
 123         mpRefDevice.clear();
 124     }
 125
 126     uno::Reference< rendering::XTextLayout > SAL_CALL  CanvasFont::createTextLayout( const rendering::StringContext& aText, sal_Int8 nDirection, sal_Int64 nRandomSeed ) throw (uno::RuntimeException)
 127     {
 128         LocalGuard aGuard;
 129
 130         if( !mpRefDevice.is() )
 131             return uno::Reference< rendering::XTextLayout >(); // we're disposed
 132
 133         return new TextLayout( aText,
 134                                nDirection,
 135                                nRandomSeed,
 136                                Reference( this ),
 137                                mpRefDevice );
 138     }
 139
 140     rendering::FontRequest SAL_CALL  CanvasFont::getFontRequest(  ) throw (uno::RuntimeException)
 141     {
 142         LocalGuard aGuard;
 143
 144         return maFontRequest;
 145     }
 146
 147     rendering::FontMetrics SAL_CALL  CanvasFont::getFontMetrics(  ) throw (uno::RuntimeException)
 148     {
 149         LocalGuard aGuard;
 150
 151         // TODO(F1)
 152         return rendering::FontMetrics();
 153     }
 154
 155     uno::Sequence< double > SAL_CALL  CanvasFont::getAvailableSizes(  ) throw (uno::RuntimeException)
 156     {
 157         LocalGuard aGuard;
 158
 159         // TODO(F1)
 160         return uno::Sequence< double >();
 161     }
 162
 163     uno::Sequence< beans::PropertyValue > SAL_CALL  CanvasFont::getExtraFontProperties(  ) throw (uno::RuntimeException)
 164     {
 165         LocalGuard aGuard;
 166
 167         // TODO(F1)
 168         return uno::Sequence< beans::PropertyValue >();
 169     }
 170
 171 #define IMPLEMENTATION_NAME "CairoCanvas::CanvasFont"
 172 #define SERVICE_NAME "com.sun.star.rendering.CanvasFont"
 173
 174     ::rtl::OUString SAL_CALL CanvasFont::getImplementationName() throw( uno::RuntimeException )
 175     {
 176         return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( IMPLEMENTATION_NAME ) );
 177     }
 178
 179     sal_Bool SAL_CALL CanvasFont::supportsService( const ::rtl::OUString& ServiceName ) throw( uno::RuntimeException )
 180     {
 181         return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( SERVICE_NAME ) );
 182     }
 183
 184     uno::Sequence< ::rtl::OUString > SAL_CALL CanvasFont::getSupportedServiceNames()  throw( uno::RuntimeException )
 185     {
 186         uno::Sequence< ::rtl::OUString > aRet(1);
 187         aRet[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) );
 188
 189         return aRet;
 190     }
 191
 192     ::Font CanvasFont::getVCLFont() const
 193     {
 194         return *maFont;
 195     }
 196 }