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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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#include "precompiled_vcl.hxx"

#include "pdffontcache.hxx"
#include <salgdi.hxx>
#include <outfont.hxx>
#include <sallayout.hxx>

using namespace vcl;

PDFFontCache::FontIdentifier::FontIdentifier( const ImplFontData* pFont, bool bVertical ) :
    m_nFontId( pFont->GetFontId() ),
    m_nMagic( pFont->GetFontMagic() ),
    m_bVertical( bVertical )
{
}

PDFFontCache::FontData& PDFFontCache::getFont( const ImplFontData* pFont, bool bVertical )
{
    FontIdentifier aId( pFont, bVertical );
    FontToIndexMap::iterator it = m_aFontToIndex.find( aId );
    if( it != m_aFontToIndex.end() )
        return m_aFonts[ it->second ];
    m_aFontToIndex[ aId ] = sal_uInt32(m_aFonts.size());
    m_aFonts.push_back( FontData() );
    return m_aFonts.back();
}

sal_Int32 PDFFontCache::getGlyphWidth( const ImplFontData* pFont, sal_GlyphId nGlyph, bool bVertical, SalGraphics* pGraphics )
{
    sal_Int32 nWidth = 0;
    FontData& rFontData( getFont( pFont, bVertical ) );
    if( rFontData.m_nWidths.empty() )
    {
        pGraphics->GetGlyphWidths( pFont, bVertical, rFontData.m_nWidths, rFontData.m_aGlyphIdToIndex );
    }
    if( ! rFontData.m_nWidths.empty() )
    {
        sal_GlyphId nIndex = nGlyph;
        if( (nGlyph & GF_ISCHAR) != 0 )
        {
            const sal_Ucs cCode = static_cast<sal_Ucs>(nGlyph & GF_IDXMASK);
            Ucs2UIntMap::const_iterator it = rFontData.m_aGlyphIdToIndex.find( cCode );

			// allow symbol aliasing U+00xx -> U+F0xx if there is no direct match
            if( it == rFontData.m_aGlyphIdToIndex.end()
			&&  pFont->IsSymbolFont()
			&&  (cCode < 0x0100) )
                it = rFontData.m_aGlyphIdToIndex.find( cCode+0xF000 );

            nIndex = (it != rFontData.m_aGlyphIdToIndex.end()) ? it->second : 0;
        }
        nIndex &= GF_IDXMASK;
        if( nIndex < rFontData.m_nWidths.size() )
            nWidth = rFontData.m_nWidths[ nIndex ];
    }
    return nWidth;
}