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
|
#pragma once
#include <mbgl/gl/shader.hpp>
#include <mbgl/gl/context.hpp>
#include <mbgl/gl/vertex_buffer.hpp>
#include <mbgl/util/optional.hpp>
#include <stdexcept>
namespace mbgl {
namespace gl {
class VertexArrayObject {
public:
template <typename Shader, typename T>
void bind(Shader& shader,
const VertexBuffer<T>& vertexBuffer,
int8_t* offset,
Context& context) {
bindVertexArrayObject(context);
if (bound_shader == 0) {
context.vertexBuffer = vertexBuffer.buffer;
context.bindAttributes(shader, vertexBuffer, offset);
if (vertexArray) {
storeBinding(shader, vertexBuffer.buffer, 0, offset);
}
} else {
verifyBinding(shader, vertexBuffer.buffer, 0, offset);
}
}
template <typename Shader, typename T, typename P>
void bind(Shader& shader,
const VertexBuffer<T>& vertexBuffer,
const IndexBuffer<P>& indexBuffer,
int8_t* offset,
Context& context) {
bindVertexArrayObject(context);
if (bound_shader == 0) {
context.vertexBuffer = vertexBuffer.buffer;
context.elementBuffer = indexBuffer.buffer;
context.bindAttributes(shader, vertexBuffer, offset);
if (vertexArray) {
storeBinding(shader, vertexBuffer.buffer, indexBuffer.buffer, offset);
}
} else {
verifyBinding(shader, vertexBuffer.buffer, indexBuffer.buffer, offset);
}
}
VertexArrayID getID() const {
return *vertexArray;
}
private:
void bindVertexArrayObject(Context&);
void storeBinding(Shader& shader,
BufferID vertexBuffer,
BufferID elementsBuffer,
int8_t* offset);
void verifyBinding(Shader& shader,
BufferID vertexBuffer,
BufferID elementsBuffer,
int8_t* offset);
optional<UniqueVertexArray> vertexArray;
// For debug reasons, we're storing the bind information so that we can
// detect errors and report
ProgramID bound_shader = 0;
const char* bound_shader_name = "";
BufferID bound_vertex_buffer = 0;
BufferID bound_elements_buffer = 0;
int8_t *bound_offset = nullptr;
};
} // namespace gl
} // namespace mbgl
|
