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<h1>FTVectoriser.cpp</h1><a href="FTVectoriser_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="preprocessor">#include    "<a class="code" href="FTVectoriser_8h.html">FTVectoriser.h</a>"</span>
00002 <span class="preprocessor">#include    "<a class="code" href="FTGL_8h.html">FTGL.h</a>"</span>
00003 
00004 <span class="preprocessor">#ifndef CALLBACK</span>
00005 <span class="preprocessor"></span><span class="preprocessor">#define CALLBACK</span>
00006 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00007 <span class="preprocessor"></span>
00008 <span class="preprocessor">#ifdef __APPLE_CC__    </span>
00009 <span class="preprocessor"></span>    <span class="keyword">typedef</span> GLvoid (*GLUTesselatorFunction)(...);
00010 <span class="preprocessor">#elif defined( __mips ) || defined( __linux__ ) || defined( __FreeBSD__ ) || defined( __OpenBSD__ ) || defined( __sun ) || defined (__CYGWIN__)</span>
00011 <span class="preprocessor"></span>    <span class="keyword">typedef</span> GLvoid (*GLUTesselatorFunction)();
00012 <span class="preprocessor">#elif defined ( WIN32)</span>
00013 <span class="preprocessor"></span>    <span class="keyword">typedef</span> GLvoid (CALLBACK *GLUTesselatorFunction)( );
00014 <span class="preprocessor">#else</span>
00015 <span class="preprocessor"></span><span class="preprocessor">    #error "Error - need to define type GLUTesselatorFunction for this platform/compiler"</span>
00016 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00017 <span class="preprocessor"></span>
00018 
<a name="l00019"></a><a class="code" href="FTVectoriser_8cpp.html#a0">00019</a> <span class="keywordtype">void</span> CALLBACK <a class="code" href="FTVectoriser_8cpp.html#a0">ftglError</a>( GLenum errCode, <a class="code" href="classFTMesh.html">FTMesh</a>* mesh)
00020 {
00021     mesh-&gt;<a class="code" href="classFTMesh.html#a6">Error</a>( errCode);
00022 }
00023 
00024 
<a name="l00025"></a><a class="code" href="FTVectoriser_8cpp.html#a1">00025</a> <span class="keywordtype">void</span> CALLBACK <a class="code" href="FTVectoriser_8cpp.html#a1">ftglVertex</a>( <span class="keywordtype">void</span>* data, <a class="code" href="classFTMesh.html">FTMesh</a>* mesh)
00026 {
00027     <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a>* vertex = static_cast&lt;FTGL_DOUBLE*&gt;(data);
00028     mesh-&gt;<a class="code" href="classFTMesh.html#a2">AddPoint</a>( vertex[0], vertex[1], vertex[2]);
00029 }
00030 
00031 
<a name="l00032"></a><a class="code" href="FTVectoriser_8cpp.html#a2">00032</a> <span class="keywordtype">void</span> CALLBACK <a class="code" href="FTVectoriser_8cpp.html#a2">ftglCombine</a>( <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> coords[3], <span class="keywordtype">void</span>* vertex_data[4], GLfloat weight[4], <span class="keywordtype">void</span>** outData, <a class="code" href="classFTMesh.html">FTMesh</a>* mesh)
00033 {
00034     <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a>* vertex = static_cast&lt;FTGL_DOUBLE*&gt;(coords);
00035     *outData = mesh-&gt;<a class="code" href="classFTMesh.html#a3">Combine</a>( vertex[0], vertex[1], vertex[2]);
00036 }
00037         
00038 
<a name="l00039"></a><a class="code" href="FTVectoriser_8cpp.html#a3">00039</a> <span class="keywordtype">void</span> CALLBACK <a class="code" href="FTVectoriser_8cpp.html#a3">ftglBegin</a>( GLenum type, <a class="code" href="classFTMesh.html">FTMesh</a>* mesh)
00040 {
00041     mesh-&gt;<a class="code" href="classFTMesh.html#a4">Begin</a>( type);
00042 }
00043 
00044 
<a name="l00045"></a><a class="code" href="FTVectoriser_8cpp.html#a4">00045</a> <span class="keywordtype">void</span> CALLBACK <a class="code" href="FTVectoriser_8cpp.html#a4">ftglEnd</a>( <a class="code" href="classFTMesh.html">FTMesh</a>* mesh)
00046 {
00047     mesh-&gt;<a class="code" href="classFTMesh.html#a5">End</a>();
00048 }
00049 
00050 
<a name="l00051"></a><a class="code" href="classFTMesh.html#a0">00051</a> <a class="code" href="classFTMesh.html#a0">FTMesh::FTMesh</a>()
00052 :   currentTesselation(0),
00053     err(0)
00054 {
00055     tesselationList.<a class="code" href="classFTVector.html#a13">reserve</a>( 16);
00056 }
00057 
00058 
<a name="l00059"></a><a class="code" href="classFTMesh.html#a1">00059</a> <a class="code" href="classFTMesh.html#a1">FTMesh::~FTMesh</a>()
00060 {
00061     <span class="keywordflow">for</span>( size_t t = 0; t &lt; tesselationList.<a class="code" href="classFTVector.html#a3">size</a>(); ++t)
00062     {
00063         <span class="keyword">delete</span> tesselationList[t];
00064     }
00065     
00066     tesselationList.<a class="code" href="classFTVector.html#a12">clear</a>();
00067 }
00068 
00069 
<a name="l00070"></a><a class="code" href="classFTMesh.html#a2">00070</a> <span class="keywordtype">void</span> <a class="code" href="classFTMesh.html#a2">FTMesh::AddPoint</a>( <span class="keyword">const</span> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> x, <span class="keyword">const</span> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> y, <span class="keyword">const</span> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> z)
00071 {
00072     currentTesselation-&gt;<a class="code" href="classFTTesselation.html#a2">AddPoint</a>( x, y, z);
00073 }
00074 
00075 
<a name="l00076"></a><a class="code" href="classFTMesh.html#a3">00076</a> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a>* <a class="code" href="classFTMesh.html#a3">FTMesh::Combine</a>( <span class="keyword">const</span> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> x, <span class="keyword">const</span> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> y, <span class="keyword">const</span> <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> z)
00077 {
00078     tempPointList.<a class="code" href="classFTList.html#a3">push_back</a>( <a class="code" href="classFTPoint.html">FTPoint</a>( x, y,z));
00079     <span class="keywordflow">return</span> static_cast&lt;FTGL_DOUBLE*&gt;(tempPointList.<a class="code" href="classFTList.html#a5">back</a>());
00080 }
00081 
00082 
<a name="l00083"></a><a class="code" href="classFTMesh.html#a4">00083</a> <span class="keywordtype">void</span> <a class="code" href="classFTMesh.html#a4">FTMesh::Begin</a>( GLenum meshType)
00084 {
00085     currentTesselation = <span class="keyword">new</span> <a class="code" href="classFTTesselation.html">FTTesselation</a>( meshType);
00086 }
00087 
00088 
<a name="l00089"></a><a class="code" href="classFTMesh.html#a5">00089</a> <span class="keywordtype">void</span> <a class="code" href="classFTMesh.html#a5">FTMesh::End</a>()
00090 {
00091     tesselationList.<a class="code" href="classFTVector.html#a14">push_back</a>( currentTesselation);
00092 }
00093 
00094 
<a name="l00095"></a><a class="code" href="classFTMesh.html#a8">00095</a> <span class="keyword">const</span> <a class="code" href="classFTTesselation.html">FTTesselation</a>* <span class="keyword">const</span> <a class="code" href="classFTMesh.html#a8">FTMesh::Tesselation</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> index)<span class="keyword"> const</span>
00096 <span class="keyword"></span>{
00097     <span class="keywordflow">return</span> ( index &lt; tesselationList.<a class="code" href="classFTVector.html#a3">size</a>()) ? tesselationList[index] : NULL;
00098 }
00099 
00100 
<a name="l00101"></a><a class="code" href="classFTVectoriser.html#a0">00101</a> <a class="code" href="classFTVectoriser.html#a0">FTVectoriser::FTVectoriser</a>( <span class="keyword">const</span> FT_GlyphSlot glyph)
00102 :   contourList(0),
00103     mesh(0),
00104     ftContourCount(0),
00105     contourFlag(0)
00106 {
00107     <span class="keywordflow">if</span>( glyph)
00108     {
00109         outline = glyph-&gt;outline;
00110         
00111         ftContourCount = outline.n_contours;
00112         contourList = 0;
00113         contourFlag = outline.flags;
00114         
00115         ProcessContours();
00116     }
00117 }
00118 
00119 
<a name="l00120"></a><a class="code" href="classFTVectoriser.html#a1">00120</a> <a class="code" href="classFTVectoriser.html#a1">FTVectoriser::~FTVectoriser</a>()
00121 {
00122     <span class="keywordflow">for</span>( size_t c = 0; c &lt; <a class="code" href="classFTVectoriser.html#a5">ContourCount</a>(); ++c)
00123     {
00124         <span class="keyword">delete</span> contourList[c];
00125     }
00126 
00127     <span class="keyword">delete</span> [] contourList;
00128     <span class="keyword">delete</span> mesh;
00129 }
00130 
00131 
00132 <span class="keywordtype">void</span> FTVectoriser::ProcessContours()
00133 {
00134     <span class="keywordtype">short</span> contourLength = 0;
00135     <span class="keywordtype">short</span> startIndex = 0;
00136     <span class="keywordtype">short</span> endIndex = 0;
00137     
00138     contourList = <span class="keyword">new</span> <a class="code" href="classFTContour.html">FTContour</a>*[ftContourCount];
00139     
00140     <span class="keywordflow">for</span>( <span class="keywordtype">short</span> contourIndex = 0; contourIndex &lt; ftContourCount; ++contourIndex)
00141     {
00142         FT_Vector* pointList = &amp;outline.points[startIndex];
00143         <span class="keywordtype">char</span>* tagList = &amp;outline.tags[startIndex];
00144         
00145         endIndex = outline.contours[contourIndex];
00146         contourLength =  ( endIndex - startIndex) + 1;
00147 
00148         FTContour* contour = <span class="keyword">new</span> FTContour( pointList, tagList, contourLength);
00149         
00150         contourList[contourIndex] = contour;
00151         
00152         startIndex = endIndex + 1;
00153     }
00154 }
00155 
00156 
<a name="l00157"></a><a class="code" href="classFTVectoriser.html#a4">00157</a> size_t <a class="code" href="classFTVectoriser.html#a4">FTVectoriser::PointCount</a>()
00158 {
00159     size_t s = 0;
00160     <span class="keywordflow">for</span>( size_t c = 0; c &lt; <a class="code" href="classFTVectoriser.html#a5">ContourCount</a>(); ++c)
00161     {
00162         s += contourList[c]-&gt;<a class="code" href="classFTContour.html#a3">PointCount</a>();
00163     }
00164     
00165     <span class="keywordflow">return</span> s;
00166 }
00167 
00168 
<a name="l00169"></a><a class="code" href="classFTVectoriser.html#a6">00169</a> <span class="keyword">const</span> <a class="code" href="classFTContour.html">FTContour</a>* <span class="keyword">const</span> <a class="code" href="classFTVectoriser.html#a6">FTVectoriser::Contour</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> index)<span class="keyword"> const</span>
00170 <span class="keyword"></span>{
00171     <span class="keywordflow">return</span> ( index &lt; <a class="code" href="classFTVectoriser.html#a5">ContourCount</a>()) ? contourList[index] : NULL;
00172 }
00173 
00174 
<a name="l00175"></a><a class="code" href="classFTVectoriser.html#a2">00175</a> <span class="keywordtype">void</span> <a class="code" href="classFTVectoriser.html#a2">FTVectoriser::MakeMesh</a>( <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a> zNormal)
00176 {
00177     <span class="keywordflow">if</span>( mesh)
00178     {
00179         <span class="keyword">delete</span> mesh;
00180     }
00181         
00182     mesh = <span class="keyword">new</span> <a class="code" href="classFTMesh.html">FTMesh</a>;
00183     
00184     GLUtesselator* tobj = gluNewTess();
00185 
00186     gluTessCallback( tobj, GLU_TESS_BEGIN_DATA,     (GLUTesselatorFunction)<a class="code" href="FTVectoriser_8cpp.html#a3">ftglBegin</a>);
00187     gluTessCallback( tobj, GLU_TESS_VERTEX_DATA,    (GLUTesselatorFunction)<a class="code" href="FTVectoriser_8cpp.html#a1">ftglVertex</a>);
00188     gluTessCallback( tobj, GLU_TESS_COMBINE_DATA,   (GLUTesselatorFunction)<a class="code" href="FTVectoriser_8cpp.html#a2">ftglCombine</a>);
00189     gluTessCallback( tobj, GLU_TESS_END_DATA,       (GLUTesselatorFunction)<a class="code" href="FTVectoriser_8cpp.html#a4">ftglEnd</a>);
00190     gluTessCallback( tobj, GLU_TESS_ERROR_DATA,     (GLUTesselatorFunction)<a class="code" href="FTVectoriser_8cpp.html#a0">ftglError</a>);
00191     
00192     <span class="keywordflow">if</span>( contourFlag &amp; ft_outline_even_odd_fill) <span class="comment">// ft_outline_reverse_fill</span>
00193     {
00194         gluTessProperty( tobj, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_ODD);
00195     }
00196     <span class="keywordflow">else</span>
00197     {
00198         gluTessProperty( tobj, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_NONZERO);
00199     }
00200     
00201     
00202     gluTessProperty( tobj, GLU_TESS_TOLERANCE, 0);
00203     gluTessNormal( tobj, 0.0f, 0.0f, zNormal);
00204     gluTessBeginPolygon( tobj, mesh);
00205     
00206         <span class="keywordflow">for</span>( size_t c = 0; c &lt; <a class="code" href="classFTVectoriser.html#a5">ContourCount</a>(); ++c)
00207         {
00208             <span class="keyword">const</span> <a class="code" href="classFTContour.html">FTContour</a>* contour = contourList[c];
00209 
00210             gluTessBeginContour( tobj);
00211             
00212                 <span class="keywordflow">for</span>( size_t p = 0; p &lt; contour-&gt;<a class="code" href="classFTContour.html#a3">PointCount</a>(); ++p)
00213                 {
00214                     <a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a>* d = (<a class="code" href="FTGL_8h.html#a4">FTGL_DOUBLE</a>*)(contour-&gt;<a class="code" href="classFTContour.html#a2">Point</a>(p)); <span class="comment">// FIXME use c++ cast</span>
00215                     gluTessVertex( tobj, d, d);
00216                 }
00217 
00218             gluTessEndContour( tobj);
00219         }
00220         
00221     gluTessEndPolygon( tobj);
00222 
00223     gluDeleteTess( tobj);
00224 }
00225 
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