| Flutter Impeller |

Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | List of all members
impeller::RuntimeStage Class Reference

`#include <runtime_stage.h>`

## Public Types
using | Map = std::map< RuntimeStageBackend, std::shared_ptr< RuntimeStage > >

## Public Member Functions
| ~RuntimeStage ()
| RuntimeStage (RuntimeStage &&)
RuntimeStage & | operator= (RuntimeStage &&)
RuntimeShaderStage | GetShaderStage () const
const std::vector< RuntimeUniformDescription > & | GetUniforms () const
const std::vector< DescriptorSetLayout > & | GetDescriptorSetLayouts () const
const std::string & | GetEntrypoint () const
const RuntimeUniformDescription * | GetUniform (const std::string &name) const
const std::shared_ptr< fml::Mapping > & | GetCodeMapping () const
bool | IsDirty () const
void | SetClean ()

## Static Public Member Functions
static absl::StatusOr< Map > | DecodeRuntimeStages (const std::shared_ptr< fml::Mapping > &payload)
static absl::StatusOr< RuntimeStage > | Create (const fb::RuntimeStage *runtime_stage, const std::shared_ptr< fml::Mapping > &payload)

## Static Public Attributes
static const char * | kVulkanUBOName

## Detailed Description

Definition at line 21 of file runtime_stage.h.

## Member Typedef Documentation

## ◆ Map

using impeller::RuntimeStage::Map = std::map<RuntimeStageBackend, std::shared_ptr<RuntimeStage> >

Definition at line 25 of file runtime_stage.h.

## Constructor & Destructor Documentation

## ◆ ~RuntimeStage()

impeller::RuntimeStage::~RuntimeStage | ( |  | ) |
| default

## ◆ RuntimeStage()

impeller::RuntimeStage::RuntimeStage | ( | RuntimeStage && |  | ) |
| default

## Member Function Documentation

## ◆ Create()

absl::StatusOr< RuntimeStage > impeller::RuntimeStage::Create | ( | const fb::RuntimeStage * | runtime_stage,
|  | const std::shared_ptr< fml::Mapping > & | payload
| ) |  |
| static

Definition at line 51 of file runtime_stage.cc.

53 {
54 if (!runtime_stage) {
55 return absl::InvalidArgumentError("Runtime stage is null.");
56 }
57
58 RuntimeStage stage(payload);
59 stage.stage_ = ToShaderStage(runtime_stage->stage());
60 stage.entrypoint_ = runtime_stage->entrypoint()->str();
61
62 auto* uniforms = runtime_stage->uniforms();
63
64 // Note: image bindings are screwy and will always have the same offset.
65 // track the binding of the UBO to determine where the image bindings go.
66 // This is only guaranteed to give us the correct bindings if there is a
67 // single sampler2D.
68 std::optional<size_t> ubo_id;
69 if (uniforms) {
70 for (auto i = uniforms->begin(), end = uniforms->end(); i != end; i++) {
71 RuntimeUniformDescription desc;
72 desc.name = i->name()->str();
73 desc.location = i->location();
74 desc.binding = i->binding();
75 desc.type = ToType(i->type());
76 if (desc.type == kStruct) {
77 ubo_id = desc.location;
78 desc.binding = desc.location;
79 }
80 desc.dimensions = RuntimeUniformDimensions{
81 static_cast<size_t>(i->rows()), static_cast<size_t>(i->columns())};
82 desc.bit_width = i->bit_width();
83 desc.array_elements = i->array_elements();
84 if (i->struct_layout()) {
85 for (const auto& byte_type : *i->struct_layout()) {
86 desc.struct_layout.push_back(static_cast<uint8_t>(byte_type));
87 }
88 }
89 desc.struct_float_count = i->struct_float_count();
90 stage.uniforms_.push_back(std::move(desc));
91 }
92 }
93
94 stage.code_mapping_ = std::make_shared<fml::NonOwnedMapping>(
95 runtime_stage->shader()->data(), //
96 runtime_stage->shader()->size(), //
97 [payload = stage.payload_](auto, auto) {} //
98 );
99
100 size_t binding = 64;
101 if (ubo_id.has_value() && ubo_id.value() == binding) {
102 binding++;
103 }
104 for (auto& uniform : stage.uniforms_) {
105 if (uniform.type == kSampledImage) {
106 uniform.binding = binding;
107 binding++;
108 if (ubo_id.has_value() && ubo_id.value() == binding) {
109 binding++;
110 }
111 }
112 }
113
114 for (const auto& uniform : stage.GetUniforms()) {
115 if (uniform.type == kStruct) {
116 stage.descriptor_set_layouts_.push_back(DescriptorSetLayout{
117 static_cast<uint32_t>(uniform.location),
118 DescriptorType::kUniformBuffer,
119 ShaderStage::kFragment,
120 });
121 } else if (uniform.type == kSampledImage) {
122 stage.descriptor_set_layouts_.push_back(DescriptorSetLayout{
123 static_cast<uint32_t>(uniform.binding),
124 DescriptorType::kSampledImage,
125 ShaderStage::kFragment,
126 });
127 }
128 }
129
130 return stage;
131 }
impeller::RuntimeStage::RuntimeStage
RuntimeStage(RuntimeStage &&)
impeller::ToShaderStage
constexpr ShaderStage ToShaderStage(RuntimeShaderStage stage)
Definition: shader_types.h:29
impeller::ShaderStage::kFragment
@ kFragment
impeller::ToType
static RuntimeUniformType ToType(fb::UniformDataType type)
Definition: runtime_stage.cc:20
impeller::DescriptorType::kUniformBuffer
@ kUniformBuffer
impeller::DescriptorType::kSampledImage
@ kSampledImage
impeller::kSampledImage
@ kSampledImage
Definition: runtime_types.h:26
impeller::kStruct
@ kStruct
Definition: runtime_types.h:27
end
const size_t end
Definition: tessellator_libtess.cc:63

References impeller::RuntimeUniformDescription::array_elements, impeller::RuntimeUniformDescription::binding, impeller::RuntimeUniformDescription::bit_width, impeller::RuntimeUniformDescription::dimensions, end, GetUniforms(), impeller::kFragment, impeller::kSampledImage, impeller::kStruct, impeller::kUniformBuffer, impeller::RuntimeUniformDescription::location, impeller::RuntimeUniformDescription::name, impeller::RuntimeUniformDescription::struct_float_count, impeller::RuntimeUniformDescription::struct_layout, impeller::ToShaderStage(), impeller::ToType(), and impeller::RuntimeUniformDescription::type.

## ◆ DecodeRuntimeStages()

absl::StatusOr< RuntimeStage::Map > impeller::RuntimeStage::DecodeRuntimeStages | ( | const std::shared_ptr< fml::Mapping > & | payload | ) |
| static

Definition at line 143 of file runtime_stage.cc.

144 {
145 if (payload == nullptr || !payload->GetMapping()) {
146 return absl::InvalidArgumentError("Payload is null or empty.");
147 }
148 if (!fb::RuntimeStagesBufferHasIdentifier(payload->GetMapping())) {
149 return absl::InvalidArgumentError(
150 "Payload does not have valid identifier.");
151 }
152
153 auto raw_stages = fb::GetRuntimeStages(payload->GetMapping());
154 if (!raw_stages) {
155 return absl::InvalidArgumentError("Failed to get runtime stages.");
156 }
157
158 const uint32_t version = raw_stages->format_version();
159 const auto expected =
160 static_cast<uint32_t>(fb::RuntimeStagesFormatVersion::kVersion);
161 if (version != expected) {
162 std::stringstream stream;
163 stream << "Unsupported runtime stages format version. Expected " << expected
164 << ", got " << version << ".";
165 return absl::InvalidArgumentError(stream.str());
166 }
167
168 return Map{
169 {RuntimeStageBackend::kSkSL,
170 RuntimeStageIfPresent(raw_stages->sksl(), payload)},
171 {RuntimeStageBackend::kMetal,
172 RuntimeStageIfPresent(raw_stages->metal(), payload)},
173 {RuntimeStageBackend::kOpenGLES,
174 RuntimeStageIfPresent(raw_stages->opengles(), payload)},
175 {RuntimeStageBackend::kOpenGLES3,
176 RuntimeStageIfPresent(raw_stages->opengles3(), payload)},
177 {RuntimeStageBackend::kVulkan,
178 RuntimeStageIfPresent(raw_stages->vulkan(), payload)},
179 };
180 }
impeller::RuntimeStage::Map
std::map< RuntimeStageBackend, std::shared_ptr< RuntimeStage > > Map
Definition: runtime_stage.h:25
impeller::RuntimeStageBackend::kOpenGLES
@ kOpenGLES
impeller::RuntimeStageBackend::kMetal
@ kMetal
impeller::RuntimeStageBackend::kVulkan
@ kVulkan
impeller::RuntimeStageBackend::kSkSL
@ kSkSL
impeller::RuntimeStageBackend::kOpenGLES3
@ kOpenGLES3

References impeller::kMetal, impeller::kOpenGLES, impeller::kOpenGLES3, impeller::kSkSL, and impeller::kVulkan.

Referenced by impeller::interop::FragmentProgram::FragmentProgram(), impeller::GoldenPlaygroundTest::OpenAssetAsRuntimeStage(), impeller::PlaygroundTest::OpenAssetAsRuntimeStage(), and impeller::testing::TEST_P().

## ◆ GetCodeMapping()

const std::shared_ptr< fml::Mapping > & impeller::RuntimeStage::GetCodeMapping | ( |  | ) | const

Definition at line 189 of file runtime_stage.cc.

189 {
190 return code_mapping_;
191 }

Referenced by impeller::RuntimeStagePlayground::RegisterStage().

## ◆ GetDescriptorSetLayouts()

const std::vector< DescriptorSetLayout > & impeller::RuntimeStage::GetDescriptorSetLayouts | ( |  | ) | const

Definition at line 224 of file runtime_stage.cc.

225 {
226 return descriptor_set_layouts_;
227 }

## ◆ GetEntrypoint()

const std::string & impeller::RuntimeStage::GetEntrypoint | ( |  | ) | const

Definition at line 208 of file runtime_stage.cc.

208 {
209 return entrypoint_;
210 }

Referenced by impeller::RuntimeStagePlayground::RegisterStage().

## ◆ GetShaderStage()

RuntimeShaderStage impeller::RuntimeStage::GetShaderStage | ( |  | ) | const

Definition at line 212 of file runtime_stage.cc.

212 {
213 return stage_;
214 }

Referenced by impeller::RuntimeStagePlayground::RegisterStage().

## ◆ GetUniform()

const RuntimeUniformDescription * impeller::RuntimeStage::GetUniform | ( | const std::string & | name | ) | const

Definition at line 198 of file runtime_stage.cc.

199 {
200 for (const auto& uniform : uniforms_) {
201 if (uniform.name == name) {
202 return &uniform;
203 }
204 }
205 return nullptr;
206 }

## ◆ GetUniforms()

const std::vector< RuntimeUniformDescription > & impeller::RuntimeStage::GetUniforms | ( |  | ) | const

Definition at line 193 of file runtime_stage.cc.

194 {
195 return uniforms_;
196 }

Referenced by Create().

## ◆ IsDirty()

bool impeller::RuntimeStage::IsDirty | ( |  | ) | const

Definition at line 216 of file runtime_stage.cc.

216 {
217 return is_dirty_;
218 }

## ◆ operator=()

RuntimeStage & impeller::RuntimeStage::operator= | ( | RuntimeStage && |  | ) |
| default

## ◆ SetClean()

void impeller::RuntimeStage::SetClean | ( |  | ) |

Definition at line 220 of file runtime_stage.cc.

220 {
221 is_dirty_ = false;
222 }

## Member Data Documentation

## ◆ kVulkanUBOName

const char * impeller::RuntimeStage::kVulkanUBOName
| static

Initial value:
=
"_RESERVED_IDENTIFIER_FIXUP_gl_DefaultUniformBlock"

The generated name from GLSLang/shaderc for the UBO containing non-opaque uniforms specified in the user-written runtime effect shader.

Vulkan does not allow non-opaque uniforms outside of a UBO.

Definition at line 23 of file runtime_stage.h.

Referenced by impeller::testing::TEST_P().

The documentation for this class was generated from the following files:

- impeller/runtime_stage/runtime_stage.h
- impeller/runtime_stage/runtime_stage.cc