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<h1>FTContour.cpp</h1><a href="FTContour_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="preprocessor">#include "<a class="code" href="FTContour_8h.html">FTContour.h</a>"</span>
00002 
<a name="l00003"></a><a class="code" href="FTContour_8cpp.html#a0">00003</a> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">float</span> <a class="code" href="FTContour_8cpp.html#a0">BEZIER_STEP_SIZE</a> = 0.2f;
00004 
00005 
00006 <span class="keywordtype">void</span> FTContour::AddPoint( <a class="code" href="classFTPoint.html">FTPoint</a> point)
00007 {
00008     <span class="keywordflow">if</span>( pointList.<a class="code" href="classFTVector.html#a9">empty</a>() || point != pointList[pointList.<a class="code" href="classFTVector.html#a3">size</a>() - 1])
00009     {
00010         pointList.<a class="code" href="classFTVector.html#a14">push_back</a>( point);
00011     }
00012 }
00013 
00014 
00015 <span class="keywordtype">void</span> FTContour::AddPoint( <span class="keywordtype">float</span> x, <span class="keywordtype">float</span> y)
00016 {
00017     AddPoint( <a class="code" href="classFTPoint.html">FTPoint</a>( x, y, 0.0f));
00018 }
00019 
00020 
00021 <span class="keywordtype">void</span> FTContour::evaluateQuadraticCurve()
00022 {
00023     <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i &lt;= ( 1.0f / <a class="code" href="FTContour_8cpp.html#a0">BEZIER_STEP_SIZE</a>); i++)
00024     {
00025         <span class="keywordtype">float</span> bezierValues[2][2];
00026 
00027         <span class="keywordtype">float</span> t = static_cast&lt;float&gt;(i) * <a class="code" href="FTContour_8cpp.html#a0">BEZIER_STEP_SIZE</a>;
00028 
00029         bezierValues[0][0] = (1.0f - t) * controlPoints[0][0] + t * controlPoints[1][0];
00030         bezierValues[0][1] = (1.0f - t) * controlPoints[0][1] + t * controlPoints[1][1];
00031     
00032         bezierValues[1][0] = (1.0f - t) * controlPoints[1][0] + t * controlPoints[2][0];
00033         bezierValues[1][1] = (1.0f - t) * controlPoints[1][1] + t * controlPoints[2][1];
00034         
00035         bezierValues[0][0] = (1.0f - t) * bezierValues[0][0] + t * bezierValues[1][0];
00036         bezierValues[0][1] = (1.0f - t) * bezierValues[0][1] + t * bezierValues[1][1];
00037     
00038         AddPoint( bezierValues[0][0], bezierValues[0][1]);
00039     }
00040 }
00041 
00042 <span class="keywordtype">void</span> FTContour::evaluateCubicCurve()
00043 {
00044     <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i &lt;= ( 1.0f / <a class="code" href="FTContour_8cpp.html#a0">BEZIER_STEP_SIZE</a>); i++)
00045     {
00046         <span class="keywordtype">float</span> bezierValues[3][2];
00047 
00048         <span class="keywordtype">float</span> t = static_cast&lt;float&gt;(i) * <a class="code" href="FTContour_8cpp.html#a0">BEZIER_STEP_SIZE</a>;
00049 
00050         bezierValues[0][0] = (1.0f - t) * controlPoints[0][0] + t * controlPoints[1][0];
00051         bezierValues[0][1] = (1.0f - t) * controlPoints[0][1] + t * controlPoints[1][1];
00052     
00053         bezierValues[1][0] = (1.0f - t) * controlPoints[1][0] + t * controlPoints[2][0];
00054         bezierValues[1][1] = (1.0f - t) * controlPoints[1][1] + t * controlPoints[2][1];
00055         
00056         bezierValues[2][0] = (1.0f - t) * controlPoints[2][0] + t * controlPoints[3][0];
00057         bezierValues[2][1] = (1.0f - t) * controlPoints[2][1] + t * controlPoints[3][1];
00058         
00059         bezierValues[0][0] = (1.0f - t) * bezierValues[0][0] + t * bezierValues[1][0];
00060         bezierValues[0][1] = (1.0f - t) * bezierValues[0][1] + t * bezierValues[1][1];
00061     
00062         bezierValues[1][0] = (1.0f - t) * bezierValues[1][0] + t * bezierValues[2][0];
00063         bezierValues[1][1] = (1.0f - t) * bezierValues[1][1] + t * bezierValues[2][1];
00064         
00065         bezierValues[0][0] = (1.0f - t) * bezierValues[0][0] + t * bezierValues[1][0];
00066         bezierValues[0][1] = (1.0f - t) * bezierValues[0][1] + t * bezierValues[1][1];
00067     
00068         AddPoint( bezierValues[0][0], bezierValues[0][1]);
00069     }
00070 }
00071 
00072 
<a name="l00073"></a><a class="code" href="classFTContour.html#a0">00073</a> <a class="code" href="classFTContour.html#a0">FTContour::FTContour</a>( FT_Vector* contour, <span class="keywordtype">char</span>* pointTags, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> numberOfPoints)
00074 {
00075     <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> pointIndex = 0; pointIndex &lt; numberOfPoints; ++ pointIndex)
00076     {
00077         <span class="keywordtype">char</span> pointTag = pointTags[pointIndex];
00078         
00079         <span class="keywordflow">if</span>( pointTag == FT_Curve_Tag_On || numberOfPoints &lt; 2)
00080         {
00081             AddPoint( contour[pointIndex].x, contour[pointIndex].y);
00082             <span class="keywordflow">continue</span>;
00083         }
00084         
00085         <a class="code" href="classFTPoint.html">FTPoint</a> controlPoint( contour[pointIndex]);
00086         <a class="code" href="classFTPoint.html">FTPoint</a> previousPoint = ( 0 == pointIndex)
00087                                 ? <a class="code" href="classFTPoint.html">FTPoint</a>( contour[numberOfPoints - 1])
00088                                 : pointList[pointList.<a class="code" href="classFTVector.html#a3">size</a>() - 1];
00089 
00090         <a class="code" href="classFTPoint.html">FTPoint</a> nextPoint = ( pointIndex == numberOfPoints - 1)
00091                             ? pointList[0]
00092                             : <a class="code" href="classFTPoint.html">FTPoint</a>( contour[pointIndex + 1]);
00093 
00094         <span class="keywordflow">if</span>( pointTag == FT_Curve_Tag_Conic)
00095         {
00096             <span class="keywordtype">char</span> nextPointTag = ( pointIndex == numberOfPoints - 1)
00097                                 ? pointTags[0]
00098                                 : pointTags[pointIndex + 1];
00099             
00100             <span class="keywordflow">while</span>( nextPointTag == FT_Curve_Tag_Conic)
00101             {
00102                 nextPoint = ( controlPoint + nextPoint) * 0.5f;
00103 
00104                 controlPoints[0][0] = previousPoint.<a class="code" href="classFTPoint.html#a7">X</a>(); controlPoints[0][1] = previousPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00105                 controlPoints[1][0] = controlPoint.<a class="code" href="classFTPoint.html#a7">X</a>();  controlPoints[1][1] = controlPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00106                 controlPoints[2][0] = nextPoint.<a class="code" href="classFTPoint.html#a7">X</a>();     controlPoints[2][1] = nextPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00107                 
00108                 evaluateQuadraticCurve();
00109                 ++pointIndex;
00110                 
00111                 previousPoint = nextPoint;
00112                 controlPoint = <a class="code" href="classFTPoint.html">FTPoint</a>( contour[pointIndex]);
00113                 nextPoint = ( pointIndex == numberOfPoints - 1)
00114                             ? pointList[0]
00115                             : FTPoint( contour[pointIndex + 1]);
00116                 nextPointTag = ( pointIndex == numberOfPoints - 1)
00117                                ? pointTags[0]
00118                                : pointTags[pointIndex + 1];
00119             }
00120             
00121             controlPoints[0][0] = previousPoint.<a class="code" href="classFTPoint.html#a7">X</a>(); controlPoints[0][1] = previousPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00122             controlPoints[1][0] = controlPoint.<a class="code" href="classFTPoint.html#a7">X</a>();  controlPoints[1][1] = controlPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00123             controlPoints[2][0] = nextPoint.<a class="code" href="classFTPoint.html#a7">X</a>();     controlPoints[2][1] = nextPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00124             
00125             evaluateQuadraticCurve();
00126             <span class="keywordflow">continue</span>;
00127         }
00128 
00129         <span class="keywordflow">if</span>( pointTag == FT_Curve_Tag_Cubic)
00130         {
00131             <a class="code" href="classFTPoint.html">FTPoint</a> controlPoint2 = nextPoint;
00132             
00133             <a class="code" href="classFTPoint.html">FTPoint</a> nextPoint = ( pointIndex == numberOfPoints - 2)
00134                                 ? pointList[0]
00135                                 : <a class="code" href="classFTPoint.html">FTPoint</a>( contour[pointIndex + 2]);
00136             
00137             controlPoints[0][0] = previousPoint.<a class="code" href="classFTPoint.html#a7">X</a>(); controlPoints[0][1] = previousPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00138             controlPoints[1][0] = controlPoint.<a class="code" href="classFTPoint.html#a7">X</a>();  controlPoints[1][1] = controlPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00139             controlPoints[2][0] = controlPoint2.<a class="code" href="classFTPoint.html#a7">X</a>(); controlPoints[2][1] = controlPoint2.<a class="code" href="classFTPoint.html#a8">Y</a>();
00140             controlPoints[3][0] = nextPoint.<a class="code" href="classFTPoint.html#a7">X</a>();     controlPoints[3][1] = nextPoint.<a class="code" href="classFTPoint.html#a8">Y</a>();
00141         
00142             evaluateCubicCurve();
00143             ++pointIndex;
00144             <span class="keywordflow">continue</span>;
00145         }
00146     }
00147 }
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