cairo_canvasfont.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <sal/config.h>
 
#include <basegfx/numeric/ftools.hxx>
#include <com/sun/star/rendering/PanoseProportion.hpp>
#include <cppuhelper/supportsservice.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <rtl/math.hxx>
#include <utility>
#include <vcl/metric.hxx>
 
#include <canvas/canvastools.hxx>
 
#include "cairo_canvasfont.hxx"
#include "cairo_textlayout.hxx"
 
using namespace ::com::sun::star;
 
namespace cairocanvas
{
 
    CanvasFont::CanvasFont( const rendering::FontRequest&                   rFontRequest,
                            const uno::Sequence< beans::PropertyValue >&    rExtraFontProperties,
                            const geometry::Matrix2D&                       rFontMatrix,
                            SurfaceProviderRef                              rDevice ) :
        maFont( vcl::Font( rFontRequest.FontDescription.FamilyName,
                      rFontRequest.FontDescription.StyleName,
                      Size( 0, ::basegfx::fround(rFontRequest.CellSize) ) ) ),
        maFontRequest( rFontRequest ),
        mpRefDevice(std::move( rDevice )),
        mnEmphasisMark(0)
    {
        ::canvas::tools::extractExtraFontProperties(rExtraFontProperties, mnEmphasisMark);
 
        maFont->SetAlignment( ALIGN_BASELINE );
        maFont->SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==css::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
        maFont->SetVertical( rFontRequest.FontDescription.IsVertical==css::util::TriState_YES );
 
        // TODO(F2): improve panose->vclenum conversion
        maFont->SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
        maFont->SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
        maFont->SetPitch(
                rFontRequest.FontDescription.FontDescription.Proportion == rendering::PanoseProportion::MONO_SPACED
                    ? PITCH_FIXED : PITCH_VARIABLE);
 
        maFont->SetLanguage( LanguageTag::convertToLanguageType( rFontRequest.Locale, false));
 
        // adjust to stretched/shrunk font
        if( ::rtl::math::approxEqual( rFontMatrix.m00, rFontMatrix.m11) )
            return;
 
        VclPtr<OutputDevice> pOutDev( mpRefDevice->getOutputDevice() );
 
        if( !pOutDev )
            return;
 
        const bool bOldMapState( pOutDev->IsMapModeEnabled() );
        pOutDev->EnableMapMode(false);
 
        const Size aSize = pOutDev->GetFontMetric( *maFont ).GetFontSize();
 
        const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
        double fStretch = rFontMatrix.m00 + rFontMatrix.m01;
 
        if( !::basegfx::fTools::equalZero( fDividend) )
            fStretch /= fDividend;
 
        const tools::Long nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
 
        maFont->SetAverageFontWidth( nNewWidth );
 
        pOutDev->EnableMapMode(bOldMapState);
    }
 
    void CanvasFont::disposing(std::unique_lock<std::mutex>& rGuard)
    {
        rGuard.unlock();
        {
            SolarMutexGuard aGuard;
            mpRefDevice.clear();
        }
        rGuard.lock();
    }
 
    uno::Reference< rendering::XTextLayout > SAL_CALL  CanvasFont::createTextLayout( const rendering::StringContext& aText, sal_Int8 nDirection, sal_Int64 nRandomSeed )
    {
        SolarMutexGuard aGuard;
 
        if( !mpRefDevice.is() )
            return uno::Reference< rendering::XTextLayout >(); // we're disposed
 
        return new TextLayout( aText,
                               nDirection,
                               nRandomSeed,
                               Reference( this ),
                               mpRefDevice );
    }
 
    rendering::FontRequest SAL_CALL  CanvasFont::getFontRequest(  )
    {
        SolarMutexGuard aGuard;
 
        return maFontRequest;
    }
 
    rendering::FontMetrics SAL_CALL  CanvasFont::getFontMetrics(  )
    {
        // TODO(F1)
        return rendering::FontMetrics();
    }
 
    uno::Sequence< double > SAL_CALL  CanvasFont::getAvailableSizes(  )
    {
        // TODO(F1)
        return uno::Sequence< double >();
    }
 
    uno::Sequence< beans::PropertyValue > SAL_CALL  CanvasFont::getExtraFontProperties(  )
    {
        // TODO(F1)
        return uno::Sequence< beans::PropertyValue >();
    }
 
    OUString SAL_CALL CanvasFont::getImplementationName()
    {
        return "CairoCanvas::CanvasFont";
    }
 
    sal_Bool SAL_CALL CanvasFont::supportsService( const OUString& ServiceName )
    {
        return cppu::supportsService( this, ServiceName );
    }
 
    uno::Sequence< OUString > SAL_CALL CanvasFont::getSupportedServiceNames()
    {
        return { "com.sun.star.rendering.CanvasFont" };
    }
 
    vcl::Font const & CanvasFont::getVCLFont() const
    {
        return *maFont;
    }
}
 
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