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
|
#pragma once
#include <mbgl/gl/object.hpp>
#include <mbgl/gl/state.hpp>
#include <mbgl/gl/value.hpp>
#include <mbgl/gl/texture.hpp>
#include <mbgl/gl/vertex_buffer.hpp>
#include <mbgl/gl/index_buffer.hpp>
#include <mbgl/gl/attribute.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <memory>
#include <vector>
#include <array>
namespace mbgl {
namespace gl {
constexpr size_t TextureMax = 64;
class Context : private util::noncopyable {
public:
~Context();
UniqueProgram createProgram();
UniqueShader createVertexShader();
UniqueShader createFragmentShader();
UniqueTexture createTexture();
UniqueVertexArray createVertexArray();
UniqueFramebuffer createFramebuffer();
template <class V>
VertexBuffer<V> createVertexBuffer(std::vector<V>&& v) {
return VertexBuffer<V> {
v.size(),
createVertexBuffer(v.data(), v.size() * sizeof(V))
};
}
template <class P>
IndexBuffer<P> createIndexBuffer(std::vector<P>&& v) {
return IndexBuffer<P> {
createIndexBuffer(v.data(), v.size() * sizeof(P))
};
}
// Create a texture from an image with data.
template <typename Image>
Texture createTexture(const Image& image, TextureUnit unit = 0) {
return { {{ image.width, image.height }},
createTexture(image.width, image.height, image.data.get(), unit) };
}
// Creates an empty texture with the specified dimensions.
Texture createTexture(const std::array<uint16_t, 2>& size, TextureUnit unit = 0) {
return { size, createTexture(size[0], size[1], nullptr, unit) };
}
void bindTexture(Texture&,
TextureUnit = 0,
TextureFilter = TextureFilter::Nearest,
TextureMipMap = TextureMipMap::No);
template <class Shader, class Vertex>
void bindAttributes(const Shader& shader, const VertexBuffer<Vertex>&, const int8_t* offset) {
static_assert(std::is_same<typename Shader::VertexType, Vertex>::value, "vertex type mismatch");
for (const auto& binding : AttributeBindings<Shader, Vertex>()(shader)) {
bindAttribute(binding, sizeof(Vertex), offset);
}
}
// Actually remove the objects we marked as abandoned with the above methods.
// Only call this while the OpenGL context is exclusive to this thread.
void performCleanup();
// Drain pools and remove abandoned objects, in preparation for destroying the store.
// Only call this while the OpenGL context is exclusive to this thread.
void reset();
bool empty() const {
return pooledTextures.empty()
&& abandonedPrograms.empty()
&& abandonedShaders.empty()
&& abandonedBuffers.empty()
&& abandonedTextures.empty()
&& abandonedVertexArrays.empty()
&& abandonedFramebuffers.empty();
}
void resetState();
void setDirtyState();
State<value::StencilFunc> stencilFunc;
State<value::StencilMask> stencilMask;
State<value::StencilTest> stencilTest;
State<value::StencilOp> stencilOp;
State<value::DepthRange> depthRange;
State<value::DepthMask> depthMask;
State<value::DepthTest> depthTest;
State<value::DepthFunc> depthFunc;
State<value::Blend> blend;
State<value::BlendFunc> blendFunc;
State<value::BlendColor> blendColor;
State<value::ColorMask> colorMask;
State<value::ClearDepth> clearDepth;
State<value::ClearColor> clearColor;
State<value::ClearStencil> clearStencil;
State<value::Program> program;
State<value::LineWidth> lineWidth;
State<value::ActiveTexture> activeTexture;
State<value::BindFramebuffer> bindFramebuffer;
State<value::Viewport> viewport;
#if not MBGL_USE_GLES2
State<value::PixelZoom> pixelZoom;
State<value::RasterPos> rasterPos;
#endif // MBGL_USE_GLES2
std::array<State<value::BindTexture>, 2> texture;
State<value::BindVertexBuffer> vertexBuffer;
State<value::BindElementBuffer> elementBuffer;
State<value::BindVertexArray> vertexArrayObject;
private:
UniqueBuffer createVertexBuffer(const void* data, std::size_t size);
UniqueBuffer createIndexBuffer(const void* data, std::size_t size);
UniqueTexture createTexture(uint16_t width, uint16_t height, const void* data, TextureUnit);
void bindAttribute(const AttributeBinding&, std::size_t stride, const int8_t* offset);
friend detail::ProgramDeleter;
friend detail::ShaderDeleter;
friend detail::BufferDeleter;
friend detail::TextureDeleter;
friend detail::VertexArrayDeleter;
friend detail::FramebufferDeleter;
std::vector<TextureID> pooledTextures;
std::vector<ProgramID> abandonedPrograms;
std::vector<ShaderID> abandonedShaders;
std::vector<BufferID> abandonedBuffers;
std::vector<TextureID> abandonedTextures;
std::vector<VertexArrayID> abandonedVertexArrays;
std::vector<FramebufferID> abandonedFramebuffers;
};
} // namespace gl
} // namespace mbgl
|
