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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
namespace varray
{
#ifndef VARRAY_INTERNAL
enum
{
ATTRIB_VERTEX = 1<<0,
ATTRIB_COLOR = 1<<1,
ATTRIB_NORMAL = 1<<2,
ATTRIB_TEXCOORD0 = 1<<3,
ATTRIB_TEXCOORD1 = 1<<4,
MAXATTRIBS = 5
};
extern vector<uchar> data;
extern void enable();
extern void begin(GLenum mode);
extern void defattrib(int type, int size, GLenum format);
template<class T>
static inline void attrib(T x)
{
T *buf = (T *)data.pad(sizeof(T));
buf[0] = x;
}
template<class T>
static inline void attrib(T x, T y)
{
T *buf = (T *)data.pad(2*sizeof(T));
buf[0] = x;
buf[1] = y;
}
template<class T>
static inline void attrib(T x, T y, T z)
{
T *buf = (T *)data.pad(3*sizeof(T));
buf[0] = x;
buf[1] = y;
buf[2] = z;
}
template<class T>
static inline void attrib(T x, T y, T z, T w)
{
T *buf = (T *)data.pad(4*sizeof(T));
buf[0] = x;
buf[1] = y;
buf[2] = z;
buf[3] = w;
}
template<size_t N, class T>
static inline void attribv(const T *v)
{
data.put((const uchar *)v, N*sizeof(T));
}
extern int end();
extern void disable();
#else
struct attribinfo
{
int type, size, formatsize, offset;
GLenum format;
attribinfo() : type(0), size(0), formatsize(0), offset(0), format(GL_FALSE) {}
bool operator==(const attribinfo &a) const
{
return type == a.type && size == a.size && format == a.format && offset == a.offset;
}
bool operator!=(const attribinfo &a) const
{
return type != a.type || size != a.size || format != a.format || offset != a.offset;
}
};
vector<uchar> data;
static attribinfo attribs[MAXATTRIBS], lastattribs[MAXATTRIBS];
static int enabled = 0, numattribs = 0, attribmask = 0, numlastattribs = 0, lastattribmask = 0, vertexsize = 0, lastvertexsize = 0;
static GLenum primtype = GL_TRIANGLES;
static uchar *lastbuf = NULL;
static bool changedattribs = false;
void enable()
{
enabled = 0;
numlastattribs = lastattribmask = lastvertexsize = 0;
lastbuf = NULL;
}
void begin(GLenum mode)
{
primtype = mode;
}
void defattrib(int type, int size, GLenum format)
{
if(type == ATTRIB_VERTEX)
{
numattribs = attribmask = 0;
vertexsize = 0;
}
changedattribs = true;
attribmask |= type;
attribinfo &a = attribs[numattribs++];
a.type = type;
a.size = size;
a.format = format;
switch(format)
{
case GL_UNSIGNED_BYTE: a.formatsize = 1; break;
case GL_BYTE: a.formatsize = 1; break;
case GL_UNSIGNED_SHORT: a.formatsize = 2; break;
case GL_SHORT: a.formatsize = 2; break;
case GL_UNSIGNED_INT: a.formatsize = 4; break;
case GL_INT: a.formatsize = 4; break;
case GL_FLOAT: a.formatsize = 4; break;
case GL_DOUBLE: a.formatsize = 8; break;
default: a.formatsize = 0; break;
}
a.formatsize *= size;
a.offset = vertexsize;
vertexsize += a.formatsize;
}
static inline void setattrib(const attribinfo &a, uchar *buf)
{
switch(a.type)
{
case ATTRIB_VERTEX:
if(!(enabled&a.type)) glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(a.size, a.format, vertexsize, buf);
break;
case ATTRIB_COLOR:
if(!(enabled&a.type)) glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(a.size, a.format, vertexsize, buf);
break;
case ATTRIB_NORMAL:
if(!(enabled&a.type)) glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(a.format, vertexsize, buf);
break;
case ATTRIB_TEXCOORD0:
if(!(enabled&a.type)) glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(a.size, a.format, vertexsize, buf);
break;
case ATTRIB_TEXCOORD1:
glClientActiveTexture_(GL_TEXTURE1_ARB);
if(!(enabled&a.type)) glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(a.size, a.format, vertexsize, buf);
glClientActiveTexture_(GL_TEXTURE0_ARB);
break;
}
enabled |= a.type;
}
static inline void unsetattrib(const attribinfo &a)
{
switch(a.type)
{
case ATTRIB_VERTEX:
glDisableClientState(GL_VERTEX_ARRAY);
break;
case ATTRIB_COLOR:
glDisableClientState(GL_COLOR_ARRAY);
break;
case ATTRIB_NORMAL:
glDisableClientState(GL_NORMAL_ARRAY);
break;
case ATTRIB_TEXCOORD0:
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
break;
case ATTRIB_TEXCOORD1:
glClientActiveTexture_(GL_TEXTURE1_ARB);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTexture_(GL_TEXTURE0_ARB);
break;
}
enabled &= ~a.type;
}
int end()
{
if(data.empty()) return 0;
uchar *buf = data.getbuf();
bool forceattribs = numattribs != numlastattribs || vertexsize != lastvertexsize || buf != lastbuf;
if(forceattribs || changedattribs)
{
int diffmask = enabled & lastattribmask & ~attribmask;
if(diffmask) loopi(numlastattribs)
{
const attribinfo &a = lastattribs[i];
if(diffmask & a.type) unsetattrib(a);
}
uchar *src = buf;
loopi(numattribs)
{
const attribinfo &a = attribs[i];
if(forceattribs || a != lastattribs[i])
{
setattrib(a, src);
lastattribs[i] = a;
}
src += a.formatsize;
}
lastbuf = buf;
numlastattribs = numattribs;
lastattribmask = attribmask;
lastvertexsize = vertexsize;
changedattribs = false;
}
int numvertexes = data.length()/vertexsize;
glDrawArrays(primtype, 0, numvertexes);
data.setsize(0);
return numvertexes;
}
void disable()
{
if(!enabled) return;
if(enabled&ATTRIB_VERTEX) glDisableClientState(GL_VERTEX_ARRAY);
if(enabled&ATTRIB_COLOR) glDisableClientState(GL_COLOR_ARRAY);
if(enabled&ATTRIB_NORMAL) glDisableClientState(GL_NORMAL_ARRAY);
if(enabled&ATTRIB_TEXCOORD0) glDisableClientState(GL_TEXTURE_COORD_ARRAY);
if(enabled&ATTRIB_TEXCOORD1)
{
glClientActiveTexture_(GL_TEXTURE1_ARB);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glClientActiveTexture_(GL_TEXTURE0_ARB);
}
enabled = 0;
}
#endif
}
|
