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kc3-lang/ftgl/include/FTContour.h
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- include/FTContour.h
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/* * FTGL - OpenGL font library * * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz> * 2008 Éric Beets <ericbeets@free.fr> * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Alternatively, you can redistribute and/or modify this software under * the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, * or (at your option) any later version. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef __FTContour__ #define __FTContour__ #include "FTPoint.h" #include "FTVector.h" #include "FTGL.h" /** * FTContour class is a container of points that describe a vector font * outline. It is used as a container for the output of the bezier curve * evaluator in FTVectoriser. * * @see FTOutlineGlyph * @see FTPolyGlyph * @see FTPoint */ class FTGL_EXPORT FTContour { public: /** * Constructor * * @param contour * @param pointTags * @param numberOfPoints */ FTContour(FT_Vector* contour, char* pointTags, unsigned int numberOfPoints); /** * Destructor */ ~FTContour() { pointList.clear(); outsetPointList.clear(); frontPointList.clear(); backPointList.clear(); } /** * Return a point at index. * * @param index of the point in the curve. * @return const point reference */ const FTPoint& Point(unsigned int index) const { return pointList[index]; } /** * Return a point at index. * * @param index of the point in the outset curve. * @return const point reference */ const FTPoint& Outset(unsigned int index) const { return outsetPointList[index]; } /** * Return a point at index of the front outset contour. * * @param index of the point in the curve. * @return const point reference */ const FTPoint& FrontPoint(unsigned int index) const { if(frontPointList.size() == 0) return Point(index); return frontPointList[index]; } /** * Return a point at index of the back outset contour. * * @param index of the point in the curve. * @return const point reference */ const FTPoint& BackPoint(unsigned int index) const { if(backPointList.size() == 0) return Point(index); return backPointList[index]; } /** * How many points define this contour * * @return the number of points in this contour */ size_t PointCount() const { return pointList.size(); } /** * How many points define this outset contour * * @return the number of points in this contour */ size_t OutsetPointCount() const { return outsetPointList.size(); } size_t FrontPointCount() const { return frontPointList.size(); } size_t BackPointCount() const { return backPointList.size(); } /** * Create the front/back outset contour * * @param outset The outset distance */ void buildFrontOutset(float outset); void buildBackOutset(float outset); private: /** * Add a point to this contour. This function tests for duplicate * points. * * @param point The point to be added to the contour. */ inline void AddPoint(FTPoint point); /** * Add a point to this contour. This function tests for duplicate * points. * * @param point The point to be added to the contour. */ inline void AddOutsetPoint(FTPoint point); /* * Add a point to this outset contour. This function tests for duplicate * points. * * @param point The point to be added to the contour outset. */ inline void AddFrontPoint(FTPoint point); inline void AddBackPoint(FTPoint point); /** * De Casteljau (bezier) algorithm contributed by Jed Soane * Evaluates a quadratic or conic (second degree) curve */ inline void evaluateQuadraticCurve(FTPoint, FTPoint, FTPoint); /** * De Casteljau (bezier) algorithm contributed by Jed Soane * Evaluates a cubic (third degree) curve */ inline void evaluateCubicCurve(FTPoint, FTPoint, FTPoint, FTPoint); /** * Create the list point of the outset contour. */ inline void outsetContour(); /** * Compute the vector norm */ inline FTGL_DOUBLE NormVector(const FTPoint &v); /** * Compute a rotation matrix from a vector */ inline void RotationMatrix(const FTPoint &a, const FTPoint &b, FTGL_DOUBLE *matRot, FTGL_DOUBLE *invRot); /** * Matrix and vector multiplication */ inline void MultMatrixVect(FTGL_DOUBLE *mat, FTPoint &v); /** * Compute the vector bisecting from a vector 'v' and a distance 'd' */ inline void ComputeBisec(FTPoint &v); /** * Compute the outset point coordinates */ inline FTPoint ComputeOutsetPoint(FTPoint a, FTPoint b, FTPoint c); /** * The list of points in this contour */ typedef FTVector<FTPoint> PointVector; PointVector pointList; PointVector outsetPointList; PointVector frontPointList; PointVector backPointList; }; #endif // __FTContour__