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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
#pragma once
#include <mbgl/gfx/program.hpp>
#include <mbgl/gl/types.hpp>
#include <mbgl/gl/object.hpp>
#include <mbgl/gl/context.hpp>
#include <mbgl/gl/draw_scope_resource.hpp>
#include <mbgl/gfx/vertex_buffer.hpp>
#include <mbgl/gfx/index_buffer.hpp>
#include <mbgl/gfx/uniform.hpp>
#include <mbgl/gl/vertex_array.hpp>
#include <mbgl/gl/attribute.hpp>
#include <mbgl/gl/uniform.hpp>
#include <mbgl/gl/texture.hpp>
#include <mbgl/gl/features.hpp>
#include <mbgl/gl/binary_program.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/programs/program_parameters.hpp>
#include <mbgl/programs/gl/shader_source.hpp>
#include <mbgl/programs/gl/shaders.hpp>
#include <string>
namespace mbgl {
namespace gl {
template <class Name>
class Program final : public gfx::Program<Name> {
public:
using AttributeList = typename Name::AttributeList;
using UniformList = typename Name::UniformList;
using TextureList = typename Name::TextureList;
Program(ProgramParameters programParameters_)
: programParameters(std::move(programParameters_)) {
}
const ProgramParameters programParameters;
static constexpr const auto vertexOffset = programs::gl::ShaderSource<Name>::vertexOffset;
static constexpr const auto fragmentOffset = programs::gl::ShaderSource<Name>::fragmentOffset;
class Instance {
public:
Instance(Context& context,
const std::initializer_list<const char*>& vertexSource,
const std::initializer_list<const char*>& fragmentSource)
: program(context.createProgram(
context.createShader(ShaderType::Vertex, vertexSource),
context.createShader(ShaderType::Fragment, fragmentSource))),
attributeLocations(context, program) {
// Re-link program after manually binding only active attributes in Attributes::queryLocations
context.linkProgram(program);
// We have to re-initialize the uniforms state from the bindings as the uniform locations
// get shifted on some implementations
uniformStates.queryLocations(program);
// Texture units are specified via uniforms as well, so we need query their locations
textureStates.queryLocations(program);
}
template <class BinaryProgram>
Instance(Context& context, const BinaryProgram& binaryProgram)
: program(context.createProgram(binaryProgram.format(), binaryProgram.code())),
attributeLocations(binaryProgram) {
uniformStates.loadNamedLocations(binaryProgram);
textureStates.loadNamedLocations(binaryProgram);
}
static std::unique_ptr<Instance>
createInstance(gl::Context& context,
const ProgramParameters& programParameters,
const std::string& additionalDefines) {
#if MBGL_HAS_BINARY_PROGRAMS
optional<std::string> cachePath =
programParameters.cachePath(programs::gl::ShaderSource<Name>::name);
std::string programIdentifier;
if (cachePath && context.supportsProgramBinaries()) {
programIdentifier = programs::gl::programIdentifier(
programParameters.getDefines(), additionalDefines, programs::gl::preludeHash,
programs::gl::ShaderSource<Name>::hash);
try {
if (auto cachedBinaryProgram = util::readFile(*cachePath)) {
const BinaryProgram binaryProgram(std::move(*cachedBinaryProgram));
if (binaryProgram.identifier() == programIdentifier) {
return std::make_unique<Instance>(context, binaryProgram);
} else {
Log::Warning(Event::OpenGL,
"Cached program %s changed. Recompilation required.",
programs::gl::ShaderSource<Name>::name);
}
}
} catch (std::runtime_error& error) {
Log::Warning(Event::OpenGL, "Could not load cached program: %s",
error.what());
}
}
#endif
// Compile the shader
const std::initializer_list<const char*> vertexSource = {
programParameters.getDefines().c_str(),
additionalDefines.c_str(),
(programs::gl::shaderSource() + programs::gl::vertexPreludeOffset),
(programs::gl::shaderSource() + vertexOffset)
};
const std::initializer_list<const char*> fragmentSource = {
programParameters.getDefines().c_str(),
additionalDefines.c_str(),
(programs::gl::shaderSource() + programs::gl::fragmentPreludeOffset),
(programs::gl::shaderSource() + fragmentOffset)
};
auto result = std::make_unique<Instance>(context, vertexSource, fragmentSource);
#if MBGL_HAS_BINARY_PROGRAMS
if (cachePath && context.supportsProgramBinaries()) {
try {
if (const auto binaryProgram =
result->template get<BinaryProgram>(context, programIdentifier)) {
util::write_file(*cachePath, binaryProgram->serialize());
Log::Warning(Event::OpenGL, "Caching program in: %s", (*cachePath).c_str());
}
} catch (std::runtime_error& error) {
Log::Warning(Event::OpenGL, "Failed to cache program: %s", error.what());
}
}
#endif
return std::move(result);
}
template <class BinaryProgram>
optional<BinaryProgram> get(Context& context, const std::string& identifier) const {
if (auto binaryProgram = context.getBinaryProgram(program)) {
return BinaryProgram{ binaryProgram->first,
std::move(binaryProgram->second),
identifier,
attributeLocations.getNamedLocations(),
uniformStates.getNamedLocations(),
textureStates.getNamedLocations() };
}
return {};
}
UniqueProgram program;
gl::AttributeLocations<AttributeList> attributeLocations;
gl::UniformStates<UniformList> uniformStates;
gl::TextureStates<TextureList> textureStates;
};
void draw(gfx::Context& genericContext,
const gfx::DrawMode& drawMode,
const gfx::DepthMode& depthMode,
const gfx::StencilMode& stencilMode,
const gfx::ColorMode& colorMode,
const gfx::CullFaceMode& cullFaceMode,
const gfx::UniformValues<UniformList>& uniformValues,
gfx::DrawScope& drawScope,
const gfx::AttributeBindings<AttributeList>& attributeBindings,
const gfx::TextureBindings<TextureList>& textureBindings,
const gfx::IndexBuffer& indexBuffer,
std::size_t indexOffset,
std::size_t indexLength) override {
auto& context = reinterpret_cast<gl::Context&>(genericContext);
context.setDepthMode(depthMode);
context.setStencilMode(stencilMode);
context.setColorMode(colorMode);
context.setCullFaceMode(cullFaceMode);
const uint32_t key = gl::AttributeKey<AttributeList>::compute(attributeBindings);
auto it = instances.find(key);
if (it == instances.end()) {
it = instances
.emplace(key,
Instance::createInstance(
context,
programParameters,
gl::AttributeKey<AttributeList>::defines(attributeBindings)))
.first;
}
auto& instance = *it->second;
context.program = instance.program;
instance.uniformStates.bind(uniformValues);
instance.textureStates.bind(context, textureBindings);
auto& vertexArray = reinterpret_cast<gl::DrawScopeResource&>(*drawScope.resource).vertexArray;
vertexArray.bind(context,
indexBuffer,
instance.attributeLocations.toBindingArray(attributeBindings));
context.draw(drawMode,
indexOffset,
indexLength);
}
private:
std::map<uint32_t, std::unique_ptr<Instance>> instances;
};
} // namespace gl
} // namespace mbgl
|
