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
|
#pragma once
#include <mbgl/gfx/uniform.hpp>
#include <mbgl/gl/types.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/util/literal.hpp>
#include <mbgl/util/ignore.hpp>
#include <mbgl/util/indexed_tuple.hpp>
#include <array>
#include <vector>
#include <map>
#include <functional>
namespace mbgl {
namespace gl {
template <class T>
void bindUniform(UniformLocation, const T&);
class ActiveUniform {
public:
std::size_t size;
UniformDataType type;
};
#ifndef NDEBUG
template <class T>
bool verifyUniform(const ActiveUniform&);
using ActiveUniforms = std::map<std::string, ActiveUniform>;
ActiveUniforms activeUniforms(ProgramID);
#endif
template <class Value>
class UniformState {
public:
UniformState(UniformLocation location_ = -1) : location(std::move(location_)) {
}
void operator=(const Value& value) {
if (location >= 0 && (!current || *current != value)) {
current = value;
bindUniform(location, value);
}
}
UniformLocation location;
optional<Value> current = {};
};
UniformLocation uniformLocation(ProgramID, const char* name);
using NamedUniformLocations = std::vector<std::pair<const std::string, UniformLocation>>;
template <class>
class UniformStates;
template <class... Us>
class UniformStates<TypeList<Us...>> final {
private:
using State = IndexedTuple<TypeList<Us...>, TypeList<UniformState<typename Us::Value>...>>;
State state;
public:
void queryLocations(const ProgramID& id) {
#ifndef NDEBUG
// Verify active uniform types match the enum
const auto active = gl::activeUniforms(id);
util::ignore(
{ // Some shader programs have uniforms declared, but not used, so they're not active.
// Therefore, we'll only verify them when they are indeed active.
(active.find(concat_literals<&string_literal<'u', '_'>::value, &Us::name>::value()) != active.end()
? verifyUniform<typename Us::Value>(active.at(concat_literals<&string_literal<'u', '_'>::value, &Us::name>::value()))
: false)... });
#endif
state = State{ gl::uniformLocation(id, concat_literals<&string_literal<'u', '_'>::value, &Us::name>::value())... };
}
template <class BinaryProgram>
void loadNamedLocations(const BinaryProgram& program) {
state = State{ UniformState<typename Us::Value>(program.uniformLocation(concat_literals<&string_literal<'u', '_'>::value, &Us::name>::value()))... };
}
NamedUniformLocations getNamedLocations() const {
return NamedUniformLocations{ { concat_literals<&string_literal<'u', '_'>::value, &Us::name>::value(), state.template get<Us>().location }... };
}
void bind(const gfx::UniformValues<TypeList<Us...>>& values) {
util::ignore({ (state.template get<Us>() = values.template get<Us>(), 0)... });
}
};
} // namespace gl
} // namespace mbgl
|
