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
|
#include <mbgl/shader/sdf_shader.hpp>
#include <mbgl/shader/shaders.hpp>
#include <mbgl/platform/gl.hpp>
#include <cstdio>
using namespace mbgl;
SDFShader::SDFShader()
: Shader(
"sdf",
shaders[SDF_SHADER].vertex,
shaders[SDF_SHADER].fragment
) {
if (!valid) {
fprintf(stderr, "invalid sdf shader\n");
return;
}
a_pos = glGetAttribLocation(program, "a_pos");
a_offset = glGetAttribLocation(program, "a_offset");
a_tex = glGetAttribLocation(program, "a_tex");
a_angle = glGetAttribLocation(program, "a_angle");
a_minzoom = glGetAttribLocation(program, "a_minzoom");
a_maxzoom = glGetAttribLocation(program, "a_maxzoom");
a_rangeend = glGetAttribLocation(program, "a_rangeend");
a_rangestart = glGetAttribLocation(program, "a_rangestart");
a_labelminzoom = glGetAttribLocation(program, "a_labelminzoom");
}
void SDFGlyphShader::bind(char *offset) {
const int stride = 16;
glEnableVertexAttribArray(a_pos);
glVertexAttribPointer(a_pos, 2, GL_SHORT, false, stride, offset + 0);
glEnableVertexAttribArray(a_offset);
glVertexAttribPointer(a_offset, 2, GL_SHORT, false, stride, offset + 4);
glEnableVertexAttribArray(a_labelminzoom);
glVertexAttribPointer(a_labelminzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 8);
glEnableVertexAttribArray(a_minzoom);
glVertexAttribPointer(a_minzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 9);
glEnableVertexAttribArray(a_maxzoom);
glVertexAttribPointer(a_maxzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 10);
glEnableVertexAttribArray(a_angle);
glVertexAttribPointer(a_angle, 1, GL_UNSIGNED_BYTE, false, stride, offset + 11);
glEnableVertexAttribArray(a_rangeend);
glVertexAttribPointer(a_rangeend, 1, GL_UNSIGNED_BYTE, false, stride, offset + 12);
glEnableVertexAttribArray(a_rangestart);
glVertexAttribPointer(a_rangestart, 1, GL_UNSIGNED_BYTE, false, stride, offset + 13);
glEnableVertexAttribArray(a_tex);
glVertexAttribPointer(a_tex, 2, GL_UNSIGNED_BYTE, false, stride, offset + 14);
}
void SDFIconShader::bind(char *offset) {
const int stride = 20;
glEnableVertexAttribArray(a_pos);
glVertexAttribPointer(a_pos, 2, GL_SHORT, false, stride, offset + 0);
glEnableVertexAttribArray(a_offset);
glVertexAttribPointer(a_offset, 2, GL_SHORT, false, stride, offset + 4);
glEnableVertexAttribArray(a_labelminzoom);
glVertexAttribPointer(a_labelminzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 8);
glEnableVertexAttribArray(a_minzoom);
glVertexAttribPointer(a_minzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 9);
glEnableVertexAttribArray(a_maxzoom);
glVertexAttribPointer(a_maxzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 10);
glEnableVertexAttribArray(a_angle);
glVertexAttribPointer(a_angle, 1, GL_UNSIGNED_BYTE, false, stride, offset + 11);
glEnableVertexAttribArray(a_rangeend);
glVertexAttribPointer(a_rangeend, 1, GL_UNSIGNED_BYTE, false, stride, offset + 12);
glEnableVertexAttribArray(a_rangestart);
glVertexAttribPointer(a_rangestart, 1, GL_UNSIGNED_BYTE, false, stride, offset + 13);
glEnableVertexAttribArray(a_tex);
glVertexAttribPointer(a_tex, 2, GL_SHORT, false, stride, offset + 16);
}
|
