1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*
* FTGL - OpenGL font library
*
* Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
* Copyright (c) 2008 Éric Beets <ericbeets@free.fr>
* Copyright (c) 2008 Sam Hocevar <sam@zoy.org>
*
* 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.
*/
#ifndef __FTContour__
#define __FTContour__
#include "FTGL/ftgl.h"
#include "FTVector.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 FTPolygonGlyph
* @see FTPoint
*/
class 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(size_t 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(size_t 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(size_t 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(size_t 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(); }
/**
* Make sure the glyph has the proper parity and create the front/back
* outset contour.
*
* @param parity The contour's parity within the glyph.
*/
void SetParity(int parity);
// FIXME: this should probably go away.
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);
/**
* 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;
/**
* Is this contour clockwise or anti-clockwise?
*/
bool clockwise;
};
#endif // __FTContour__
|
