00001 #ifndef _TESSELATOR_H_
00002 #define _TESSELATOR_H_
00003
00004 #include <list>
00005 #include <utility>
00006
00007 #include <ft2build.h>
00008 #include FT_FREETYPE_H
00009
00010 #include SYS_GL_HEADER
00011 #include SYS_GLU_HEADER
00012 #include <vectorizer.h>
00013
00014 #if defined(__WIN32__) || defined(_WIN32)
00015 #define CALL_CONVENTION __stdcall
00016 #else
00017 #define CALL_CONVENTION
00018 #endif
00019
00020 #ifdef __APPLE_CC__
00021 typedef GLvoid (*GLUTesselatorFunction)(...);
00022 #elif defined( __mips ) || defined( __linux__ ) || defined( __FreeBSD__ ) || defined( __OpenBSD__ ) || defined( __sun ) || defined (__CYGWIN__)
00023 typedef GLvoid (*GLUTesselatorFunction)();
00024 #elif defined(__WIN32__) || defined(_WIN32)
00025 typedef GLvoid (CALL_CONVENTION *GLUTesselatorFunction)( );
00026 #else
00027 #error "Error - need to define type GLUTesselatorFunction for this platform/compiler"
00028 #endif
00029
00030 namespace glttf {
00031
00033
00039 class Tesselator
00040 {
00041 public:
00043
00052 Tesselator(Vectorizer &vectorizer, int windingRule);
00053
00055 ~Tesselator();
00056
00058
00064 void draw(float nx = 0.0f, float ny = 0.0f, float nz = 1.0f, float z = 0.0f) const;
00065
00066 private:
00067 typedef std::pair<float, float> Vertex;
00068 typedef std::list<Vertex> VertexList;
00069 typedef std::pair<GLenum, VertexList> Primitive;
00070 typedef std::list<Primitive> PrimitiveList;
00071
00072 PrimitiveList primitives;
00073 Primitive *currentPrimitive;
00074
00075 static void CALL_CONVENTION vertexCallback(void *data, Tesselator *tess);
00076 static void CALL_CONVENTION errorCallback(GLenum error, Tesselator *tess);
00077 static void CALL_CONVENTION beginCallback(GLenum primitive, Tesselator *tess);
00078 static void CALL_CONVENTION combineCallback(GLdouble coords[3], void *vertex_data[4], GLfloat weight[4], GLdouble **dataOut, Tesselator *tess);
00079 static void CALL_CONVENTION endCallback(Tesselator *tess);
00080
00081 void beginPrimitive(GLenum primitive);
00082 void addVertex(float x, float y);
00083 void endPrimitive();
00084
00085 std::list<GLdouble*> tempData;
00086 void addTempData(GLdouble *data);
00087 void freeTempData();
00088
00089 void tesselate(Vectorizer &vectorizer, GLUtesselator *tess, GLdouble *data);
00090 };
00091
00092 }
00093
00094 #endif
