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<h1>FTCharToGlyphIndexMap.h</h1><a href="FTCharToGlyphIndexMap_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="preprocessor">#ifndef    __FTCharToGlyphIndexMap__</span>
00002 <span class="preprocessor"></span><span class="preprocessor">#define    __FTCharToGlyphIndexMap__</span>
00003 <span class="preprocessor"></span>
00004 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
00005 
00006 <span class="preprocessor">#include "<a class="code" href="FTGL_8h.html">FTGL.h</a>"</span>
00007 
<a name="l00027"></a><a class="code" href="classFTCharToGlyphIndexMap.html">00027</a> <span class="keyword">class </span><a class="code" href="FTGL_8h.html#a3">FTGL_EXPORT</a> FTCharToGlyphIndexMap
00028 {
00029     <span class="keyword">public</span>:
00030   
<a name="l00031"></a><a class="code" href="classFTCharToGlyphIndexMap.html#w0">00031</a>         <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code" href="classFTCharToGlyphIndexMap.html#w0">CharacterCode</a>;
<a name="l00032"></a><a class="code" href="classFTCharToGlyphIndexMap.html#w1">00032</a>         <span class="keyword">typedef</span> <span class="keywordtype">signed</span> <span class="keywordtype">long</span> <a class="code" href="classFTCharToGlyphIndexMap.html#w1">GlyphIndex</a>;
00033         
00034         <span class="keyword">enum</span> 
00035         {
00036             NumberOfBuckets = 256,
00037             BucketSize = 256,
00038             IndexNotFound = -1
00039         };
00040 
<a name="l00041"></a><a class="code" href="classFTCharToGlyphIndexMap.html#a0">00041</a>         FTCharToGlyphIndexMap()
00042         {
00043             this-&gt;Indices = 0;
00044         }
00045 
<a name="l00046"></a><a class="code" href="classFTCharToGlyphIndexMap.html#a1">00046</a>         <span class="keyword">virtual</span> ~FTCharToGlyphIndexMap()
00047         {
00048             <span class="keywordflow">if</span>( this-&gt;Indices)
00049             {
00050                 <span class="comment">// Free all buckets</span>
00051                 this-&gt;clear();
00052         
00053                 <span class="comment">// Free main structure</span>
00054                 <span class="keyword">delete</span> [] this-&gt;Indices;
00055                 this-&gt;Indices = 0;
00056             }
00057         }
00058   
<a name="l00059"></a><a class="code" href="classFTCharToGlyphIndexMap.html#a2">00059</a>         <span class="keywordtype">void</span> clear()
00060         {
00061             <span class="keywordflow">if</span>(this-&gt;Indices)
00062             {
00063                 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="classFTCharToGlyphIndexMap.html#w5w2">FTCharToGlyphIndexMap::NumberOfBuckets</a>; i++)
00064                 {
00065                     <span class="keywordflow">if</span>( this-&gt;Indices[i])
00066                     {
00067                         <span class="keyword">delete</span> [] this-&gt;Indices[i];
00068                         this-&gt;Indices[i] = 0;
00069                     }
00070                 }
00071             }
00072         }
00073 
<a name="l00074"></a><a class="code" href="classFTCharToGlyphIndexMap.html#a3">00074</a>         <span class="keyword">const</span> <a class="code" href="classFTCharToGlyphIndexMap.html#w1">GlyphIndex</a> find( <a class="code" href="classFTCharToGlyphIndexMap.html#w0">CharacterCode</a> c)
00075         {
00076             <span class="keywordflow">if</span>( !this-&gt;Indices)
00077             {
00078                 <span class="keywordflow">return</span> 0;
00079             }
00080         
00081             <span class="comment">// Find position of char code in buckets</span>
00082             div_t pos = div( c, <a class="code" href="classFTCharToGlyphIndexMap.html#w5w3">FTCharToGlyphIndexMap::BucketSize</a>);
00083         
00084             <span class="keywordflow">if</span>( !this-&gt;Indices[pos.quot])
00085             {
00086                 <span class="keywordflow">return</span> 0;
00087             }
00088         
00089             <span class="keyword">const</span> <a class="code" href="classFTCharToGlyphIndexMap.html#w1">FTCharToGlyphIndexMap::GlyphIndex</a> *ptr = &amp;this-&gt;Indices[pos.quot][pos.rem];
00090             <span class="keywordflow">if</span>( *ptr == <a class="code" href="classFTCharToGlyphIndexMap.html#w5w4">FTCharToGlyphIndexMap::IndexNotFound</a>)
00091             {
00092                 <span class="keywordflow">return</span> 0;
00093             }
00094         
00095             <span class="keywordflow">return</span> *ptr;
00096         }
00097 
<a name="l00098"></a><a class="code" href="classFTCharToGlyphIndexMap.html#a4">00098</a>         <span class="keywordtype">void</span> insert( <a class="code" href="classFTCharToGlyphIndexMap.html#w0">CharacterCode</a> c, <a class="code" href="classFTCharToGlyphIndexMap.html#w1">GlyphIndex</a> g)
00099         {
00100             <span class="keywordflow">if</span>( !this-&gt;Indices)
00101             {
00102                 this-&gt;Indices = <span class="keyword">new</span> <a class="code" href="classFTCharToGlyphIndexMap.html#w1">GlyphIndex</a>* [<a class="code" href="classFTCharToGlyphIndexMap.html#w5w2">FTCharToGlyphIndexMap::NumberOfBuckets</a>];
00103                 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="classFTCharToGlyphIndexMap.html#w5w2">FTCharToGlyphIndexMap::NumberOfBuckets</a>; i++)
00104                 {
00105                     this-&gt;Indices[i] = 0;
00106                 }
00107             }
00108         
00109             <span class="comment">// Find position of char code in buckets</span>
00110             div_t pos = div(c, <a class="code" href="classFTCharToGlyphIndexMap.html#w5w3">FTCharToGlyphIndexMap::BucketSize</a>);
00111         
00112             <span class="comment">// Allocate bucket if does not exist yet</span>
00113             <span class="keywordflow">if</span>( !this-&gt;Indices[pos.quot])
00114             {
00115                 this-&gt;Indices[pos.quot] = <span class="keyword">new</span> <a class="code" href="classFTCharToGlyphIndexMap.html#w1">GlyphIndex</a> [<a class="code" href="classFTCharToGlyphIndexMap.html#w5w3">FTCharToGlyphIndexMap::BucketSize</a>];
00116                 <span class="keywordflow">for</span>( <span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="classFTCharToGlyphIndexMap.html#w5w3">FTCharToGlyphIndexMap::BucketSize</a>; i++)
00117                 {
00118                     this-&gt;Indices[pos.quot][i] = <a class="code" href="classFTCharToGlyphIndexMap.html#w5w4">FTCharToGlyphIndexMap::IndexNotFound</a>;
00119                 }
00120             }
00121           
00122             this-&gt;Indices[pos.quot][pos.rem] = g;
00123         }
00124   
00125     <span class="keyword">private</span>:
00126         GlyphIndex** Indices;
00127 };
00128 
00129 
00130 <span class="preprocessor">#endif  //  __FTCharToGlyphIndexMap__</span>
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