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
|
#include <math.h>
#include "FTExtrdGlyph.h"
#include "FTVectoriser.h"
FTExtrdGlyph::FTExtrdGlyph( FT_GlyphSlot glyph, float d)
: FTGlyph( glyph),
glList(0),
depth(d)
{
bBox.SetDepth( -depth);
if( ft_glyph_format_outline != glyph->format)
{
err = 0x14; // Invalid_Outline
return;
}
FTVectoriser vectoriser( glyph);
if ( ( vectoriser.ContourCount() < 1) || ( vectoriser.PointCount() < 3))
{
return;
}
unsigned int tesselationIndex;
glList = glGenLists(1);
glNewList( glList, GL_COMPILE);
vectoriser.MakeMesh( 1.0);
glNormal3d(0.0, 0.0, 1.0);
const FTMesh* mesh = vectoriser.GetMesh();
for( tesselationIndex = 0; tesselationIndex < mesh->TesselationCount(); ++tesselationIndex)
{
const FTTesselation* subMesh = mesh->Tesselation( tesselationIndex);
unsigned int polyonType = subMesh->PolygonType();
glBegin( polyonType);
for( unsigned int pointIndex = 0; pointIndex < subMesh->PointCount(); ++pointIndex)
{
glVertex3f( subMesh->Point( pointIndex).x / 64.0f,
subMesh->Point( pointIndex).y / 64.0f,
0.0f);
}
glEnd();
}
vectoriser.MakeMesh( -1.0);
glNormal3d(0.0, 0.0, -1.0);
mesh = vectoriser.GetMesh();
for( tesselationIndex = 0; tesselationIndex < mesh->TesselationCount(); ++tesselationIndex)
{
const FTTesselation* subMesh = mesh->Tesselation( tesselationIndex);
unsigned int polyonType = subMesh->PolygonType();
glBegin( polyonType);
for( unsigned int pointIndex = 0; pointIndex < subMesh->PointCount(); ++pointIndex)
{
glVertex3f( subMesh->Point( pointIndex).x / 64.0f,
subMesh->Point( pointIndex).y / 64.0f,
-depth);
}
glEnd();
}
int contourFlag = vectoriser.ContourFlag();
for( size_t c = 0; c < vectoriser.ContourCount(); ++c)
{
const FTContour* contour = vectoriser.Contour(c);
unsigned int numberOfPoints = contour->PointCount();
glBegin( GL_QUAD_STRIP);
for( unsigned int j = 0; j <= numberOfPoints; ++j)
{
unsigned int index = ( j == numberOfPoints) ? 0 : j;
unsigned int nextIndex = ( index == numberOfPoints - 1) ? 0 : index + 1;
FTPoint normal = GetNormal( contour->Point(index), contour->Point(nextIndex));
glNormal3f( normal.x, normal.y, 0.0f);
if( contourFlag & ft_outline_reverse_fill)
{
glVertex3f( contour->Point(index).x / 64.0f, contour->Point(index).y / 64.0f, 0.0f);
glVertex3f( contour->Point(index).x / 64.0f, contour->Point(index).y / 64.0f, -depth);
}
else
{
glVertex3f( contour->Point(index).x / 64.0f, contour->Point(index).y / 64.0f, -depth);
glVertex3f( contour->Point(index).x / 64.0f, contour->Point(index).y / 64.0f, 0.0f);
}
}
glEnd();
}
glEndList();
}
FTExtrdGlyph::~FTExtrdGlyph()
{
glDeleteLists( glList, 1);
}
float FTExtrdGlyph::Render( const FTPoint& pen)
{
if( glList)
{
glTranslatef( pen.x, pen.y, 0);
glCallList( glList);
glTranslatef( -pen.x, -pen.y, 0);
}
return advance;
}
FTPoint FTExtrdGlyph::GetNormal( const FTPoint &a, const FTPoint &b)
{
float vectorX = a.x - b.x;
float vectorY = a.y - b.y;
float length = sqrt( vectorX * vectorX + vectorY * vectorY );
if( length > 0.0f)
{
length = 1 / length;
}
else
{
length = 0.0f;
}
return FTPoint( -vectorY * length,
vectorX * length,
0.0f);
}
|
