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
|
#pragma once
#include <mbgl/gl/types.hpp>
#include <mbgl/gl/object.hpp>
#include <mbgl/gl/context.hpp>
#include <mbgl/gl/vertex_buffer.hpp>
#include <mbgl/gl/index_buffer.hpp>
#include <mbgl/gl/attribute.hpp>
#include <mbgl/gl/uniform.hpp>
#include <string>
namespace mbgl {
namespace gl {
template <class P, class As, class Us>
class Program {
public:
using Primitive = P;
using Attributes = As;
using Uniforms = Us;
using UniformValues = typename Uniforms::Values;
using AttributeBindings = typename Attributes::Bindings;
Program(Context& context, const std::string& vertexSource, const std::string& fragmentSource)
: vertexShader(context.createShader(ShaderType::Vertex, vertexSource)),
fragmentShader(context.createShader(ShaderType::Fragment, fragmentSource)),
program(context.createProgram(vertexShader, fragmentShader)),
attributeLocations(Attributes::locations(program)),
uniformsState((context.linkProgram(program), Uniforms::state(program))) {}
template <class DrawMode>
void draw(Context& context,
DrawMode drawMode,
DepthMode depthMode,
StencilMode stencilMode,
ColorMode colorMode,
UniformValues&& uniformValues,
AttributeBindings&& attributeBindings,
const IndexBuffer<DrawMode>& indexBuffer,
const SegmentVector<Attributes>& segments) {
static_assert(std::is_same<Primitive, typename DrawMode::Primitive>::value, "incompatible draw mode");
context.setDrawMode(drawMode);
context.setDepthMode(depthMode);
context.setStencilMode(stencilMode);
context.setColorMode(colorMode);
context.program = program;
Uniforms::bind(uniformsState, std::move(uniformValues));
for (const auto& segment : segments) {
segment.bind(context,
indexBuffer.buffer,
attributeLocations,
attributeBindings);
context.draw(drawMode.primitiveType,
segment.indexOffset,
segment.indexLength);
}
}
private:
UniqueShader vertexShader;
UniqueShader fragmentShader;
UniqueProgram program;
typename Attributes::Locations attributeLocations;
typename Uniforms::State uniformsState;
};
} // namespace gl
} // namespace mbgl
|
