| Flutter Impeller |

Namespaces | Classes | Typedefs | Enumerations | Functions | Variables
impeller::compiler Namespace Reference

## Namespaces
| testing

## Classes
class | Compiler
struct | CompilerBackend
struct | IncludeDir
struct | IncluderData
class | Includer
class | AutoLogger
struct | KnownType
struct | VertexType
struct | StructMember
class | Reflector
class | RuntimeStageData
class | ShaderBundleData
struct | SourceOptions
class | UniqueIncluder
| Wraps a shared includer so unique includers may be created to satisfy the shaderc API. This is a simple proxy object and does nothing. More...
struct | SPIRVCompilerSourceProfile
struct | SPIRVCompilerTargetEnv
struct | SPIRVCompilerOptions
class | SPIRVCompiler
class | CompilerSkSL
class | Switches
struct | UniformDescription
struct | InputDescription
struct | ShaderConfig
| A shader config parsed as part of a ShaderBundleConfig. More...

## Typedefs
using | ShaderBundleConfig = std::unordered_map< std::string, ShaderConfig >

## Enumerations
enum class | SourceType { kUnknown , kVertexShader , kFragmentShader , kComputeShader }
enum class | TargetPlatform { kUnknown , kMetalDesktop , kMetalIOS , kOpenGLES , kOpenGLDesktop , kVulkan , kRuntimeStageMetal , kRuntimeStageGLES , kRuntimeStageGLES3 , kRuntimeStageVulkan , kSkSL }
enum class | SourceLanguage { kUnknown , kGLSL , kHLSL }

## Functions
static uint32_t | ParseMSLVersion (const std::string &msl_version)
static CompilerBackend | CreateMSLCompiler (const spirv_cross::ParsedIR &ir, const SourceOptions &source_options, std::optional< uint32_t > msl_version_override={})
static CompilerBackend | CreateVulkanCompiler (const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
static CompilerBackend | CreateGLSLCompiler (const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
static CompilerBackend | CreateSkSLCompiler (const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
static bool | EntryPointMustBeNamedMain (TargetPlatform platform)
static CompilerBackend | CreateCompiler (const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
static std::string | JoinStrings (std::vector< std::string > items, const std::string &separator)
static Reflector::Options | CreateReflectorOptions (const SourceOptions &options, const Switches &switches)
static std::shared_ptr< RuntimeStageData::Shader > | CompileSkSL (std::shared_ptr< fml::Mapping > source_file_mapping, const Switches &switches)
static bool | OutputIPLR (const Switches &switches, const std::shared_ptr< fml::Mapping > &source_file_mapping)
static bool | OutputSLFile (const Compiler &compiler, const Switches &switches)
static bool | OutputReflectionData (const Compiler &compiler, const Switches &switches, const SourceOptions &options)
static bool | OutputDepfile (const Compiler &compiler, const Switches &switches)
bool | Main (const fml::CommandLine &command_line)
static std::string | ExecutionModelToString (spv::ExecutionModel model)
static std::string | StringToShaderStage (const std::string &str)
static std::optional< RuntimeStageBackend > | GetRuntimeStageBackend (TargetPlatform target_platform)
static std::string | ToString (CompilerBackend::Type type)
static std::string | TypeNameWithPaddingOfSize (size_t size)
static std::optional< KnownType > | ReadKnownScalarType (spirv_cross::SPIRType::BaseType type)
static size_t | GetReflectedStructSize (const std::vector< StructMember > &members)
| Get the reflected struct size. In the vast majority of the cases, this is the same as the declared struct size as given by the compiler. But, additional padding may need to be introduced after the end of the struct to keep in line with the alignment requirement of the individual struct members. This method figures out the actual size of the reflected struct that can be referenced in native code. More...
static VertexType | VertexTypeFromInputResource (const spirv_cross::Compiler &compiler, const spirv_cross::Resource *resource)
static std::optional< fb::Stage > | ToStage (spv::ExecutionModel stage)
static std::optional< fb::Stage > | ToJsonStage (spv::ExecutionModel stage)
static std::optional< fb::UniformDataType > | ToUniformType (spirv_cross::SPIRType::BaseType type)
static std::optional< fb::InputDataType > | ToInputType (spirv_cross::SPIRType::BaseType type)
static std::optional< uint32_t > | ToJsonType (spirv_cross::SPIRType::BaseType type)
static std::string | RuntimeStageBackendToString (RuntimeStageBackend backend)
std::optional< ShaderBundleConfig > | ParseShaderBundleConfig (const std::string &bundle_config_json, std::ostream &error_stream)
| Parse a shader bundle configuration from a given JSON string. More...
static std::unique_ptr< fb::shaderbundle::BackendShaderT > | GenerateShaderBackendFB (TargetPlatform target_platform, SourceOptions &options, const std::string &shader_name, const ShaderConfig &shader_config)
static std::unique_ptr< fb::shaderbundle::ShaderT > | GenerateShaderFB (SourceOptions options, const std::string &shader_name, const ShaderConfig &shader_config)
std::optional< fb::shaderbundle::ShaderBundleT > | GenerateShaderBundleFlatbuffer (const std::string &bundle_config_json, const SourceOptions &options)
| Parses the JSON shader bundle configuration and invokes the compiler multiple times to produce a shader bundle flatbuffer. More...
bool | GenerateShaderBundle (Switches &switches)
| Parses the JSON shader bundle configuration and invokes the compiler multiple times to produce a shader bundle flatbuffer, which is then output to the `sl` file. More...
static std::optional< fb::shaderbundle::ShaderStage > | ToStage (spv::ExecutionModel stage)
static std::optional< fb::shaderbundle::UniformDataType > | ToUniformType (spirv_cross::SPIRType::BaseType type)
static std::optional< fb::shaderbundle::InputDataType > | ToInputType (spirv_cross::SPIRType::BaseType type)
static void | SetDefaultLimitations (shaderc::CompileOptions &compiler_opts)
static void | SetBindingBaseOffset (shaderc::CompileOptions &options)
void | report_and_exit (const std::string &msg)
static TargetPlatform | TargetPlatformFromCommandLine (const fml::CommandLine &command_line)
static std::vector< TargetPlatform > | RuntimeStagesFromCommandLine (const fml::CommandLine &command_line)
static SourceType | SourceTypeFromCommandLine (const fml::CommandLine &command_line)
static bool | StringEndWith (const std::string &string, const std::string &suffix)
SourceType | SourceTypeFromFileName (const std::string &file_name)
SourceType | SourceTypeFromString (std::string name)
SourceLanguage | ToSourceLanguage (const std::string &source_language)
std::string | TargetPlatformToString (TargetPlatform platform)
std::string | SourceLanguageToString (SourceLanguage source_language)
std::string | EntryPointFunctionNameFromSourceName (const std::string &file_name, SourceType type, SourceLanguage source_language, const std::string &entry_point_name)
bool | TargetPlatformNeedsReflection (TargetPlatform platform)
std::string | ShaderCErrorToString (shaderc_compilation_status status)
shaderc_shader_kind | ToShaderCShaderKind (SourceType type)
spv::ExecutionModel | ToExecutionModel (SourceType type)
spirv_cross::CompilerMSL::Options::Platform | TargetPlatformToMSLPlatform (TargetPlatform platform)
std::string | SourceTypeToString (SourceType type)
std::string | TargetPlatformSLExtension (TargetPlatform platform)
bool | TargetPlatformIsOpenGL (TargetPlatform platform)
bool | TargetPlatformIsMetal (TargetPlatform platform)
bool | TargetPlatformIsVulkan (TargetPlatform platform)
bool | TargetPlatformBundlesSkSL (TargetPlatform platform)
bool | SetPermissiveAccess (const std::filesystem::path &p)
| Sets the file access mode of the file at path 'p' to 0644. More...
std::string | Utf8FromPath (const std::filesystem::path &path)
| Converts a native format path to a utf8 string. More...
std::string | InferShaderNameFromPath (std::string_view path)
std::string | ToCamelCase (std::string_view string)
std::string | ToLowerCase (std::string_view string)
std::string | ConvertToEntrypointName (std::string_view string)
| Ensure that the entrypoint name is a valid identifier in the target language. More...
bool | StringStartsWith (const std::string &target, const std::string &prefix)

## Variables
constexpr std::string_view | kReflectionHeaderTemplate
constexpr std::string_view | kReflectionCCTemplate
static const uint32_t | kMaxUniformBufferSize = 6208
constexpr char | kExternalTexturePrefix [] = "SAMPLER_EXTERNAL_OES_"
static const char * | kStageKey = "stage"
static const char * | kTargetPlatformKey = "target_platform"
static const char * | kEntrypointKey = "entrypoint"
static const char * | kUniformsKey = "uniforms"
static const char * | kShaderKey = "shader"
static const char * | kUniformNameKey = "name"
static const char * | kUniformLocationKey = "location"
static const char * | kUniformTypeKey = "type"
static const char * | kUniformRowsKey = "rows"
static const char * | kUniformColumnsKey = "columns"
static const char * | kUniformBitWidthKey = "bit_width"
static const char * | kUniformArrayElementsKey = "array_elements"
static const std::map< std::string, TargetPlatform > | kKnownPlatforms
static const std::map< std::string, TargetPlatform > | kKnownRuntimeStages
static const std::map< std::string, SourceType > | kKnownSourceTypes

## Typedef Documentation

## ◆ ShaderBundleConfig

using impeller::compiler::ShaderBundleConfig = typedef std::unordered_map<std::string, ShaderConfig>

Definition at line 82 of file types.h.

## Enumeration Type Documentation

## ◆ SourceLanguage

enum impeller::compiler::SourceLanguage
| strong

Enumerator
kUnknown |
kGLSL |
kHLSL |

Definition at line 42 of file types.h.

42 {
43 kUnknown,
44 kGLSL,
45 kHLSL,
46 };
impeller::compiler::SourceType::kUnknown
@ kUnknown
impeller::compiler::SourceLanguage::kGLSL
@ kGLSL
impeller::compiler::SourceLanguage::kHLSL
@ kHLSL

## ◆ SourceType

enum impeller::compiler::SourceType
| strong

Enumerator
kUnknown |
kVertexShader |
kFragmentShader |
kComputeShader |

Definition at line 21 of file types.h.

21 {
22 kUnknown,
23 kVertexShader,
24 kFragmentShader,
25 kComputeShader,
26 };
impeller::compiler::SourceType::kFragmentShader
@ kFragmentShader
impeller::compiler::SourceType::kVertexShader
@ kVertexShader
impeller::compiler::SourceType::kComputeShader
@ kComputeShader

## ◆ TargetPlatform

enum impeller::compiler::TargetPlatform
| strong

Enumerator
kUnknown |
kMetalDesktop |
kMetalIOS |
kOpenGLES |
kOpenGLDesktop |
kVulkan |
kRuntimeStageMetal |
kRuntimeStageGLES |
kRuntimeStageGLES3 |
kRuntimeStageVulkan |
kSkSL |

Definition at line 28 of file types.h.

28 {
29 kUnknown,
30 kMetalDesktop,
31 kMetalIOS,
32 kOpenGLES,
33 kOpenGLDesktop,
34 kVulkan,
35 kRuntimeStageMetal,
36 kRuntimeStageGLES,
37 kRuntimeStageGLES3,
38 kRuntimeStageVulkan,
39 kSkSL,
40 };
impeller::compiler::TargetPlatform::kRuntimeStageMetal
@ kRuntimeStageMetal
impeller::compiler::TargetPlatform::kOpenGLES
@ kOpenGLES
impeller::compiler::TargetPlatform::kRuntimeStageVulkan
@ kRuntimeStageVulkan
impeller::compiler::TargetPlatform::kRuntimeStageGLES3
@ kRuntimeStageGLES3
impeller::compiler::TargetPlatform::kVulkan
@ kVulkan
impeller::compiler::TargetPlatform::kMetalDesktop
@ kMetalDesktop
impeller::compiler::TargetPlatform::kMetalIOS
@ kMetalIOS
impeller::compiler::TargetPlatform::kSkSL
@ kSkSL
impeller::compiler::TargetPlatform::kOpenGLDesktop
@ kOpenGLDesktop
impeller::compiler::TargetPlatform::kRuntimeStageGLES
@ kRuntimeStageGLES

## Function Documentation

## ◆ CompileSkSL()

static std::shared_ptr<RuntimeStageData::Shader> impeller::compiler::CompileSkSL | ( | std::shared_ptr< fml::Mapping > | source_file_mapping,
|  | const Switches & | switches
| ) |  |
| static

Run the shader compiler to geneate SkSL reflection data. If there is an error, prints error text and returns `nullptr`.

Definition at line 37 of file impellerc_main.cc.

39 {
40 auto options = switches.CreateSourceOptions(TargetPlatform::kSkSL);
41
42 Reflector::Options sksl_reflector_options =
43 CreateReflectorOptions(options, switches);
44 sksl_reflector_options.target_platform = TargetPlatform::kSkSL;
45
46 Compiler sksl_compiler =
47 Compiler(std::move(source_file_mapping), options, sksl_reflector_options);
48 if (!sksl_compiler.IsValid()) {
49 std::cerr << "Compilation to SkSL failed." << std::endl;
50 std::cerr << sksl_compiler.GetErrorMessages() << std::endl;
51 return nullptr;
52 }
53 return sksl_compiler.GetReflector()->GetRuntimeStageShaderData();
54 }
impeller::compiler::CreateReflectorOptions
static Reflector::Options CreateReflectorOptions(const SourceOptions &options, const Switches &switches)
Definition: impellerc_main.cc:23

References CreateReflectorOptions(), impeller::compiler::Switches::CreateSourceOptions(), impeller::compiler::Compiler::GetErrorMessages(), impeller::compiler::Compiler::GetReflector(), impeller::compiler::Reflector::GetRuntimeStageShaderData(), impeller::compiler::Compiler::IsValid(), kSkSL, and impeller::compiler::Reflector::Options::target_platform.

Referenced by OutputIPLR().

## ◆ ConvertToEntrypointName()

std::string impeller::compiler::ConvertToEntrypointName | ( | std::string_view | string | ) |

Ensure that the entrypoint name is a valid identifier in the target language.

Definition at line 69 of file utilities.cc.

69 {
70 if (string.empty()) {
71 return "";
72 }
73 std::stringstream stream;
74 // Append a prefix if the first character is not a letter.
75 if (!std::isalpha(string.data()[0])) {
76 stream << "i_";
77 }
78 for (size_t i = 0, count = string.length(); i < count; i++) {
79 auto ch = string.data()[i];
80 if (std::isalnum(ch) || ch == '_') {
81 stream << ch;
82 }
83 }
84 return stream.str();
85 }
data
std::shared_ptr< const fml::Mapping > data
Definition: texture_gles.cc:67

References data.

Referenced by EntryPointFunctionNameFromSourceName(), and impeller::compiler::testing::TEST().

## ◆ CreateCompiler()

static CompilerBackend impeller::compiler::CreateCompiler | ( | const spirv_cross::ParsedIR & | ir,
|  | const SourceOptions & | source_options
| ) |  |
| static

Definition at line 230 of file compiler.cc.

231 {
232 CompilerBackend compiler;
233 switch (source_options.target_platform) {
234 case TargetPlatform::kMetalDesktop:
235 case TargetPlatform::kMetalIOS:
236 case TargetPlatform::kRuntimeStageMetal:
237 compiler = CreateMSLCompiler(ir, source_options);
238 break;
239 case TargetPlatform::kVulkan:
240 case TargetPlatform::kRuntimeStageVulkan:
241 compiler = CreateVulkanCompiler(ir, source_options);
242 break;
243 case TargetPlatform::kUnknown:
244 case TargetPlatform::kOpenGLES:
245 case TargetPlatform::kOpenGLDesktop:
246 case TargetPlatform::kRuntimeStageGLES:
247 case TargetPlatform::kRuntimeStageGLES3:
248 compiler = CreateGLSLCompiler(ir, source_options);
249 break;
250 case TargetPlatform::kSkSL:
251 compiler = CreateSkSLCompiler(ir, source_options);
252 }
253 if (!compiler) {
254 return {};
255 }
256 auto* backend = compiler.GetCompiler();
257 if (!EntryPointMustBeNamedMain(source_options.target_platform) &&
258 source_options.source_language == SourceLanguage::kGLSL) {
259 backend->rename_entry_point("main", source_options.entry_point_name,
260 ToExecutionModel(source_options.type));
261 }
262 return compiler;
263 }
impeller::compiler::CreateSkSLCompiler
static CompilerBackend CreateSkSLCompiler(const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
Definition: compiler.cc:204
impeller::compiler::CreateVulkanCompiler
static CompilerBackend CreateVulkanCompiler(const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
Definition: compiler.cc:134
impeller::compiler::EntryPointMustBeNamedMain
static bool EntryPointMustBeNamedMain(TargetPlatform platform)
Definition: compiler.cc:210
impeller::compiler::CreateMSLCompiler
static CompilerBackend CreateMSLCompiler(const spirv_cross::ParsedIR &ir, const SourceOptions &source_options, std::optional< uint32_t > msl_version_override={})
Definition: compiler.cc:63
impeller::compiler::CreateGLSLCompiler
static CompilerBackend CreateGLSLCompiler(const spirv_cross::ParsedIR &ir, const SourceOptions &source_options)
Definition: compiler.cc:146
impeller::compiler::ToExecutionModel
spv::ExecutionModel ToExecutionModel(SourceType type)
Definition: types.cc:201

References CreateGLSLCompiler(), CreateMSLCompiler(), CreateSkSLCompiler(), CreateVulkanCompiler(), impeller::compiler::SourceOptions::entry_point_name, EntryPointMustBeNamedMain(), impeller::compiler::CompilerBackend::GetCompiler(), kGLSL, kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, kVulkan, impeller::compiler::SourceOptions::source_language, impeller::compiler::SourceOptions::target_platform, ToExecutionModel(), and impeller::compiler::SourceOptions::type.

Referenced by impeller::compiler::Compiler::Compiler().

## ◆ CreateGLSLCompiler()

static CompilerBackend impeller::compiler::CreateGLSLCompiler | ( | const spirv_cross::ParsedIR & | ir,
|  | const SourceOptions & | source_options
| ) |  |
| static

Definition at line 146 of file compiler.cc.

147 {
148 auto gl_compiler = std::make_shared<spirv_cross::CompilerGLSL>(ir);
149
150 // Walk the variables and insert the external image extension if any of them
151 // begins with the external texture prefix. Unfortunately, we can't walk
152 // `gl_compiler->get_shader_resources().separate_samplers` until the compiler
153 // is further along.
154 //
155 // Unfortunately, we can't just let the shader author add this extension and
156 // use `samplerExternalOES` directly because compiling to spirv requires the
157 // source language profile to be at least 310 ES, but this extension is
158 // incompatible with ES 310+.
159 for (auto& id : ir.ids_for_constant_or_variable) {
160 if (StringStartsWith(ir.get_name(id), kExternalTexturePrefix)) {
161 if (source_options.gles_language_version >= 300) {
162 gl_compiler->require_extension(kEGLImageExternalExtension300);
163 } else {
164 gl_compiler->require_extension(kEGLImageExternalExtension);
165 }
166 break;
167 }
168 }
169
170 spirv_cross::CompilerGLSL::Options sl_options;
171 sl_options.force_zero_initialized_variables = true;
172 sl_options.vertex.fixup_clipspace = true;
173 if (source_options.target_platform == TargetPlatform::kOpenGLES ||
174 source_options.target_platform == TargetPlatform::kRuntimeStageGLES ||
175 source_options.target_platform == TargetPlatform::kRuntimeStageGLES3) {
176 sl_options.version = source_options.gles_language_version > 0
177 ? source_options.gles_language_version
178 : 100;
179 sl_options.es = true;
180 if (source_options.target_platform == TargetPlatform::kRuntimeStageGLES3) {
181 sl_options.version = 300;
182 }
183 if (source_options.require_framebuffer_fetch &&
184 source_options.type == SourceType::kFragmentShader) {
185 gl_compiler->remap_ext_framebuffer_fetch(0, 0, true);
186 }
187 gl_compiler->set_variable_type_remap_callback(
188 [&](const spirv_cross::SPIRType& type, const std::string& var_name,
189 std::string& name_of_type) {
190 if (StringStartsWith(var_name, kExternalTexturePrefix)) {
191 name_of_type = "samplerExternalOES";
192 }
193 });
194 } else {
195 sl_options.version = source_options.gles_language_version > 0
196 ? source_options.gles_language_version
197 : 120;
198 sl_options.es = false;
199 }
200 gl_compiler->set_common_options(sl_options);
201 return CompilerBackend(gl_compiler);
202 }
type
GLenum type
Definition: blit_command_gles.cc:151
impeller::compiler::kExternalTexturePrefix
constexpr char kExternalTexturePrefix[]
Definition: constants.h:11
impeller::compiler::StringStartsWith
bool StringStartsWith(const std::string &target, const std::string &prefix)
Definition: utilities.cc:87

References impeller::compiler::SourceOptions::gles_language_version, kExternalTexturePrefix, kFragmentShader, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, impeller::compiler::SourceOptions::require_framebuffer_fetch, StringStartsWith(), impeller::compiler::SourceOptions::target_platform, impeller::compiler::SourceOptions::type, and type.

Referenced by CreateCompiler().

## ◆ CreateMSLCompiler()

static CompilerBackend impeller::compiler::CreateMSLCompiler | ( | const spirv_cross::ParsedIR & | ir,
|  | const SourceOptions & | source_options,
|  | std::optional< uint32_t > | msl_version_override = `{}`
| ) |  |
| static

Definition at line 63 of file compiler.cc.

66 {}) {
67 auto sl_compiler = std::make_shared<spirv_cross::CompilerMSL>(ir);
68 spirv_cross::CompilerMSL::Options sl_options;
69 sl_options.platform =
70 TargetPlatformToMSLPlatform(source_options.target_platform);
71 sl_options.msl_version = msl_version_override.value_or(
72 ParseMSLVersion(source_options.metal_version));
73 sl_options.ios_use_simdgroup_functions =
74 sl_options.is_ios() &&
75 sl_options.msl_version >=
76 spirv_cross::CompilerMSL::Options::make_msl_version(2, 4, 0);
77 sl_options.use_framebuffer_fetch_subpasses = true;
78 sl_compiler->set_msl_options(sl_options);
79
80 // Sort the float and sampler uniforms according to their declared/decorated
81 // order. For user authored fragment shaders, the API for setting uniform
82 // values uses the index of the uniform in the declared order. By default, the
83 // metal backend of spirv-cross will order uniforms according to usage. To fix
84 // this, we use the sorted order and the add_msl_resource_binding API to force
85 // the ordering to match the declared order. Note that while this code runs
86 // for all compiled shaders, it will only affect vertex and fragment shaders
87 // due to the specified stage.
88 auto floats =
89 SortUniforms(&ir, sl_compiler.get(), spirv_cross::SPIRType::Float);
90 auto images =
91 SortUniforms(&ir, sl_compiler.get(), spirv_cross::SPIRType::SampledImage);
92
93 spv::ExecutionModel execution_model =
94 spv::ExecutionModel::ExecutionModelFragment;
95 if (source_options.type == SourceType::kVertexShader) {
96 execution_model = spv::ExecutionModel::ExecutionModelVertex;
97 }
98
99 uint32_t buffer_offset = 0;
100 uint32_t sampler_offset = 0;
101 for (auto& float_id : floats) {
102 sl_compiler->add_msl_resource_binding(
103 {.stage = execution_model,
104 .basetype = spirv_cross::SPIRType::BaseType::Float,
105 .desc_set = sl_compiler->get_decoration(float_id,
106 spv::DecorationDescriptorSet),
107 .binding =
108 sl_compiler->get_decoration(float_id, spv::DecorationBinding),
109 .count = 1u,
110 .msl_buffer = buffer_offset});
111 buffer_offset++;
112 }
113 for (auto& image_id : images) {
114 sl_compiler->add_msl_resource_binding({
115 .stage = execution_model,
116 .basetype = spirv_cross::SPIRType::BaseType::SampledImage,
117 .desc_set =
118 sl_compiler->get_decoration(image_id, spv::DecorationDescriptorSet),
119 .binding =
120 sl_compiler->get_decoration(image_id, spv::DecorationBinding),
121 .count = 1u,
122 // A sampled image is both an image and a sampler, so both
123 // offsets need to be set or depending on the partiular shader
124 // the bindings may be incorrect.
125 .msl_texture = sampler_offset,
126 .msl_sampler = sampler_offset,
127 });
128 sampler_offset++;
129 }
130
131 return CompilerBackend(sl_compiler);
132 }
impeller::compiler::TargetPlatformToMSLPlatform
spirv_cross::CompilerMSL::Options::Platform TargetPlatformToMSLPlatform(TargetPlatform platform)
Definition: types.cc:215
impeller::compiler::ParseMSLVersion
static uint32_t ParseMSLVersion(const std::string &msl_version)
Definition: compiler.cc:40
impeller::SortUniforms
std::vector< spirv_cross::ID > SortUniforms(const spirv_cross::ParsedIR *ir, const spirv_cross::Compiler *compiler, std::optional< spirv_cross::SPIRType::BaseType > type_filter, bool include)
Sorts uniform declarations in an IR according to decoration order.
Definition: uniform_sorter.cc:11

Referenced by CreateCompiler().

## ◆ CreateReflectorOptions()

static Reflector::Options impeller::compiler::CreateReflectorOptions | ( | const SourceOptions & | options,
|  | const Switches & | switches
| ) |  |
| static

Definition at line 23 of file impellerc_main.cc.

24 {
25 Reflector::Options reflector_options;
26 reflector_options.target_platform = options.target_platform;
27 reflector_options.entry_point_name = options.entry_point_name;
28 reflector_options.shader_name =
29 InferShaderNameFromPath(switches.source_file_name);
30 reflector_options.header_file_name = Utf8FromPath(
31 std::filesystem::path{switches.reflection_header_name}.filename());
32 return reflector_options;
33 }
impeller::compiler::Utf8FromPath
std::string Utf8FromPath(const std::filesystem::path &path)
Converts a native format path to a utf8 string.
Definition: utilities.cc:30
impeller::compiler::InferShaderNameFromPath
std::string InferShaderNameFromPath(std::string_view path)
Definition: utilities.cc:34

References impeller::compiler::Reflector::Options::entry_point_name, impeller::compiler::SourceOptions::entry_point_name, impeller::compiler::Reflector::Options::header_file_name, InferShaderNameFromPath(), impeller::compiler::Switches::reflection_header_name, impeller::compiler::Reflector::Options::shader_name, impeller::compiler::Switches::source_file_name, impeller::compiler::Reflector::Options::target_platform, impeller::compiler::SourceOptions::target_platform, and Utf8FromPath().

Referenced by CompileSkSL(), Main(), and OutputIPLR().

## ◆ CreateSkSLCompiler()

static CompilerBackend impeller::compiler::CreateSkSLCompiler | ( | const spirv_cross::ParsedIR & | ir,
|  | const SourceOptions & | source_options
| ) |  |
| static

Definition at line 204 of file compiler.cc.

205 {
206 auto sksl_compiler = std::make_shared<CompilerSkSL>(ir);
207 return CompilerBackend(sksl_compiler);
208 }

Referenced by CreateCompiler().

## ◆ CreateVulkanCompiler()

static CompilerBackend impeller::compiler::CreateVulkanCompiler | ( | const spirv_cross::ParsedIR & | ir,
|  | const SourceOptions & | source_options
| ) |  |
| static

Definition at line 134 of file compiler.cc.

136 {
137 auto gl_compiler = std::make_shared<spirv_cross::CompilerGLSL>(ir);
138 spirv_cross::CompilerGLSL::Options sl_options;
139 sl_options.force_zero_initialized_variables = true;
140 sl_options.vertex.fixup_clipspace = true;
141 sl_options.vulkan_semantics = true;
142 gl_compiler->set_common_options(sl_options);
143 return CompilerBackend(gl_compiler);
144 }

Referenced by CreateCompiler().

## ◆ EntryPointFunctionNameFromSourceName()

std::string impeller::compiler::EntryPointFunctionNameFromSourceName | ( | const std::string & | file_name,
|  | SourceType | type,
|  | SourceLanguage | source_language,
|  | const std::string & | entry_point_name
| ) |  |

Definition at line 113 of file types.cc.

117 {
118 if (source_language == SourceLanguage::kHLSL) {
119 return entry_point_name;
120 }
121
122 std::stringstream stream;
123 std::filesystem::path file_path(file_name);
124 stream << ConvertToEntrypointName(Utf8FromPath(file_path.stem())) << "_";
125 switch (type) {
126 case SourceType::kUnknown:
127 stream << "unknown";
128 break;
129 case SourceType::kVertexShader:
130 stream << "vertex";
131 break;
132 case SourceType::kFragmentShader:
133 stream << "fragment";
134 break;
135 case SourceType::kComputeShader:
136 stream << "compute";
137 break;
138 }
139 stream << "_main";
140 return stream.str();
141 }
impeller::compiler::ConvertToEntrypointName
std::string ConvertToEntrypointName(std::string_view string)
Ensure that the entrypoint name is a valid identifier in the target language.
Definition: utilities.cc:69

References ConvertToEntrypointName(), kComputeShader, kFragmentShader, kHLSL, kUnknown, kVertexShader, type, and Utf8FromPath().

Referenced by impeller::compiler::testing::CompilerTest::CanCompileAndReflect(), impeller::compiler::Switches::CreateSourceOptions(), and GenerateShaderBackendFB().

## ◆ EntryPointMustBeNamedMain()

static bool impeller::compiler::EntryPointMustBeNamedMain | ( | TargetPlatform | platform | ) |
| static

Definition at line 210 of file compiler.cc.

210 {
211 switch (platform) {
212 case TargetPlatform::kUnknown:
213 FML_UNREACHABLE();
214 case TargetPlatform::kMetalDesktop:
215 case TargetPlatform::kMetalIOS:
216 case TargetPlatform::kVulkan:
217 case TargetPlatform::kRuntimeStageMetal:
218 case TargetPlatform::kRuntimeStageVulkan:
219 return false;
220 case TargetPlatform::kSkSL:
221 case TargetPlatform::kOpenGLES:
222 case TargetPlatform::kOpenGLDesktop:
223 case TargetPlatform::kRuntimeStageGLES:
224 case TargetPlatform::kRuntimeStageGLES3:
225 return true;
226 }
227 FML_UNREACHABLE();
228 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

Referenced by CreateCompiler().

## ◆ ExecutionModelToString()

static std::string impeller::compiler::ExecutionModelToString | ( | spv::ExecutionModel | model | ) |
| static

Definition at line 33 of file reflector.cc.

33 {
34 switch (model) {
35 case spv::ExecutionModel::ExecutionModelVertex:
36 return "vertex";
37 case spv::ExecutionModel::ExecutionModelFragment:
38 return "fragment";
39 case spv::ExecutionModel::ExecutionModelGLCompute:
40 return "compute";
41 default:
42 return "unsupported";
43 }
44 }

## ◆ GenerateShaderBackendFB()

static std::unique_ptr<fb::shaderbundle::BackendShaderT> impeller::compiler::GenerateShaderBackendFB | ( | TargetPlatform | target_platform,
|  | SourceOptions & | options,
|  | const std::string & | shader_name,
|  | const ShaderConfig & | shader_config
| ) |  |
| static

Override options.

Definition at line 85 of file shader_bundle.cc.

88 {
89 auto result = std::make_unique<fb::shaderbundle::BackendShaderT>();
90
91 std::shared_ptr<fml::FileMapping> source_file_mapping =
92 fml::FileMapping::CreateReadOnly(shader_config.source_file_name);
93 if (!source_file_mapping) {
94 std::cerr << "Could not open file for bundled shader \"" << shader_name
95 << "\"." << std::endl;
96 return nullptr;
97 }
98
99 /// Override options.
100 options.target_platform = target_platform;
101 options.file_name = shader_name; // This is just used for error messages.
102 options.type = shader_config.type;
103 options.source_language = shader_config.language;
104 options.entry_point_name = EntryPointFunctionNameFromSourceName(
105 shader_config.source_file_name, options.type, options.source_language,
106 shader_config.entry_point);
107
108 Reflector::Options reflector_options;
109 reflector_options.target_platform = options.target_platform;
110 reflector_options.entry_point_name = options.entry_point_name;
111 reflector_options.shader_name = shader_name;
112
113 Compiler compiler(source_file_mapping, options, reflector_options);
114 if (!compiler.IsValid()) {
115 std::cerr << "Compilation failed for bundled shader \"" << shader_name
116 << "\"." << std::endl;
117 std::cerr << compiler.GetErrorMessages() << std::endl;
118 return nullptr;
119 }
120
121 auto reflector = compiler.GetReflector();
122 if (reflector == nullptr) {
123 std::cerr << "Could not create reflector for bundled shader \""
124 << shader_name << "\"." << std::endl;
125 return nullptr;
126 }
127
128 auto bundle_data = reflector->GetShaderBundleData();
129 if (!bundle_data) {
130 std::cerr << "Bundled shader information was nil for \"" << shader_name
131 << "\"." << std::endl;
132 return nullptr;
133 }
134
135 result = bundle_data->CreateFlatbuffer();
136 if (!result) {
137 std::cerr << "Failed to create flatbuffer for bundled shader \""
138 << shader_name << "\"." << std::endl;
139 return nullptr;
140 }
141
142 return result;
143 }
impeller::compiler::EntryPointFunctionNameFromSourceName
std::string EntryPointFunctionNameFromSourceName(const std::string &file_name, SourceType type, SourceLanguage source_language, const std::string &entry_point_name)
Definition: types.cc:113

References impeller::compiler::ShaderConfig::entry_point, impeller::compiler::Reflector::Options::entry_point_name, impeller::compiler::SourceOptions::entry_point_name, EntryPointFunctionNameFromSourceName(), impeller::compiler::SourceOptions::file_name, impeller::compiler::Compiler::GetErrorMessages(), impeller::compiler::Compiler::GetReflector(), impeller::compiler::Reflector::GetShaderBundleData(), impeller::compiler::Compiler::IsValid(), impeller::compiler::ShaderConfig::language, impeller::compiler::Reflector::Options::shader_name, impeller::compiler::ShaderConfig::source_file_name, impeller::compiler::SourceOptions::source_language, impeller::compiler::Reflector::Options::target_platform, impeller::compiler::SourceOptions::target_platform, impeller::compiler::SourceOptions::type, and impeller::compiler::ShaderConfig::type.

Referenced by GenerateShaderFB().

## ◆ GenerateShaderBundle()

bool impeller::compiler::GenerateShaderBundle | ( | Switches & | switches | ) |

Parses the JSON shader bundle configuration and invokes the compiler multiple times to produce a shader bundle flatbuffer, which is then output to the `sl` file.

1. Parse the shader bundle and generate the flatbuffer result.
2. Serialize the shader bundle and write to disk.

Definition at line 210 of file shader_bundle.cc.

210 {
211 // --------------------------------------------------------------------------
212 /// 1. Parse the shader bundle and generate the flatbuffer result.
213 ///
214
215 auto shader_bundle = GenerateShaderBundleFlatbuffer(
216 switches.shader_bundle, switches.CreateSourceOptions());
217 if (!shader_bundle.has_value()) {
218 // Specific error messages are already handled by
219 // GenerateShaderBundleFlatbuffer.
220 return false;
221 }
222
223 // --------------------------------------------------------------------------
224 /// 2. Serialize the shader bundle and write to disk.
225 ///
226
227 auto builder = std::make_shared<flatbuffers::FlatBufferBuilder>();
228 builder->Finish(fb::shaderbundle::ShaderBundle::Pack(*builder.get(),
229 &shader_bundle.value()),
230 fb::shaderbundle::ShaderBundleIdentifier());
231 auto mapping = std::make_shared<fml::NonOwnedMapping>(
232 builder->GetBufferPointer(), builder->GetSize(),
233 [builder](auto, auto) {});
234
235 auto sl_file_name = std::filesystem::absolute(
236 std::filesystem::current_path() / switches.sl_file_name);
237
238 if (!fml::WriteAtomically(*switches.working_directory, //
239 Utf8FromPath(sl_file_name).c_str(), //
240 *mapping //
241 )) {
242 std::cerr << "Could not write file to " << switches.sl_file_name
243 << std::endl;
244 return false;
245 }
246 // Tools that consume the runtime stage data expect the access mode to
247 // be 0644.
248 if (!SetPermissiveAccess(sl_file_name)) {
249 return false;
250 }
251
252 return true;
253 }
impeller::compiler::SetPermissiveAccess
bool SetPermissiveAccess(const std::filesystem::path &p)
Sets the file access mode of the file at path 'p' to 0644.
Definition: utilities.cc:16
impeller::compiler::GenerateShaderBundleFlatbuffer
std::optional< fb::shaderbundle::ShaderBundleT > GenerateShaderBundleFlatbuffer(const std::string &bundle_config_json, const SourceOptions &options)
Parses the JSON shader bundle configuration and invokes the compiler multiple times to produce a shad...
Definition: shader_bundle.cc:179

References impeller::compiler::Switches::CreateSourceOptions(), GenerateShaderBundleFlatbuffer(), SetPermissiveAccess(), impeller::compiler::Switches::shader_bundle, impeller::compiler::Switches::sl_file_name, Utf8FromPath(), and impeller::compiler::Switches::working_directory.

Referenced by Main().

## ◆ GenerateShaderBundleFlatbuffer()

std::optional< fb::shaderbundle::ShaderBundleT > impeller::compiler::GenerateShaderBundleFlatbuffer | ( | const std::string & | bundle_config_json,
|  | const SourceOptions & | options
| ) |  |

Parses the JSON shader bundle configuration and invokes the compiler multiple times to produce a shader bundle flatbuffer.

Note
  Exposed only for testing purposes. Use `GenerateShaderBundle` directly.

1. Parse the bundle configuration.
2. Build the deserialized shader bundle.

Definition at line 179 of file shader_bundle.cc.

181 {
182 // --------------------------------------------------------------------------
183 /// 1. Parse the bundle configuration.
184 ///
185
186 std::optional<ShaderBundleConfig> bundle_config =
187 ParseShaderBundleConfig(bundle_config_json, std::cerr);
188 if (!bundle_config) {
189 return std::nullopt;
190 }
191
192 // --------------------------------------------------------------------------
193 /// 2. Build the deserialized shader bundle.
194 ///
195
196 fb::shaderbundle::ShaderBundleT shader_bundle;
197
198 for (const auto& [shader_name, shader_config] : bundle_config.value()) {
199 std::unique_ptr<fb::shaderbundle::ShaderT> shader =
200 GenerateShaderFB(options, shader_name, shader_config);
201 if (!shader) {
202 return std::nullopt;
203 }
204 shader_bundle.shaders.push_back(std::move(shader));
205 }
206
207 return shader_bundle;
208 }
impeller::compiler::ParseShaderBundleConfig
std::optional< ShaderBundleConfig > ParseShaderBundleConfig(const std::string &bundle_config_json, std::ostream &error_stream)
Parse a shader bundle configuration from a given JSON string.
Definition: shader_bundle.cc:19
impeller::compiler::GenerateShaderFB
static std::unique_ptr< fb::shaderbundle::ShaderT > GenerateShaderFB(SourceOptions options, const std::string &shader_name, const ShaderConfig &shader_config)
Definition: shader_bundle.cc:145

References GenerateShaderFB(), and ParseShaderBundleConfig().

Referenced by GenerateShaderBundle(), and impeller::compiler::testing::TEST().

## ◆ GenerateShaderFB()

static std::unique_ptr<fb::shaderbundle::ShaderT> impeller::compiler::GenerateShaderFB | ( | SourceOptions | options,
|  | const std::string & | shader_name,
|  | const ShaderConfig & | shader_config
| ) |  |
| static

Definition at line 145 of file shader_bundle.cc.

148 {
149 auto result = std::make_unique<fb::shaderbundle::ShaderT>();
150 result->name = shader_name;
151 result->metal_ios = GenerateShaderBackendFB(
152 TargetPlatform::kMetalIOS, options, shader_name, shader_config);
153 if (!result->metal_ios) {
154 return nullptr;
155 }
156 result->metal_desktop = GenerateShaderBackendFB(
157 TargetPlatform::kMetalDesktop, options, shader_name, shader_config);
158 if (!result->metal_desktop) {
159 return nullptr;
160 }
161 result->opengl_es = GenerateShaderBackendFB(
162 TargetPlatform::kOpenGLES, options, shader_name, shader_config);
163 if (!result->opengl_es) {
164 return nullptr;
165 }
166 result->opengl_desktop = GenerateShaderBackendFB(
167 TargetPlatform::kOpenGLDesktop, options, shader_name, shader_config);
168 if (!result->opengl_desktop) {
169 return nullptr;
170 }
171 result->vulkan = GenerateShaderBackendFB(TargetPlatform::kVulkan, options,
172 shader_name, shader_config);
173 if (!result->vulkan) {
174 return nullptr;
175 }
176 return result;
177 }
impeller::compiler::GenerateShaderBackendFB
static std::unique_ptr< fb::shaderbundle::BackendShaderT > GenerateShaderBackendFB(TargetPlatform target_platform, SourceOptions &options, const std::string &shader_name, const ShaderConfig &shader_config)
Definition: shader_bundle.cc:85

References GenerateShaderBackendFB(), kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, and kVulkan.

Referenced by GenerateShaderBundleFlatbuffer().

## ◆ GetReflectedStructSize()

static size_t impeller::compiler::GetReflectedStructSize | ( | const std::vector< StructMember > & | members | ) |
| static

Get the reflected struct size. In the vast majority of the cases, this is the same as the declared struct size as given by the compiler. But, additional padding may need to be introduced after the end of the struct to keep in line with the alignment requirement of the individual struct members. This method figures out the actual size of the reflected struct that can be referenced in native code.

Parameters

  [in] | members | The members

Returns
  The reflected structure size.

Definition at line 801 of file reflector.cc.

801 {
802 auto struct_size = 0u;
803 for (const auto& member : members) {
804 struct_size += member.byte_length;
805 }
806 return struct_size;
807 }

## ◆ GetRuntimeStageBackend()

static std::optional<RuntimeStageBackend> impeller::compiler::GetRuntimeStageBackend | ( | TargetPlatform | target_platform | ) |
| static

Definition at line 301 of file reflector.cc.

302 {
303 switch (target_platform) {
304 case TargetPlatform::kUnknown:
305 case TargetPlatform::kMetalDesktop:
306 case TargetPlatform::kMetalIOS:
307 case TargetPlatform::kOpenGLES:
308 case TargetPlatform::kOpenGLDesktop:
309 case TargetPlatform::kVulkan:
310 return std::nullopt;
311 case TargetPlatform::kRuntimeStageMetal:
312 return RuntimeStageBackend::kMetal;
313 case TargetPlatform::kRuntimeStageGLES:
314 return RuntimeStageBackend::kOpenGLES;
315 case TargetPlatform::kRuntimeStageGLES3:
316 return RuntimeStageBackend::kOpenGLES3;
317 case TargetPlatform::kRuntimeStageVulkan:
318 return RuntimeStageBackend::kVulkan;
319 case TargetPlatform::kSkSL:
320 return RuntimeStageBackend::kSkSL;
321 }
322 FML_UNREACHABLE();
323 }

References impeller::kMetal, kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, impeller::kOpenGLES, impeller::kOpenGLES3, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, impeller::kSkSL, kUnknown, kVulkan, and impeller::kVulkan.

## ◆ InferShaderNameFromPath()

std::string impeller::compiler::InferShaderNameFromPath | ( | std::string_view | path | ) |

Definition at line 34 of file utilities.cc.

34 {
35 auto p = std::filesystem::path{path}.stem();
36 return Utf8FromPath(p);
37 }

References Utf8FromPath().

Referenced by CreateReflectorOptions().

## ◆ JoinStrings()

static std::string impeller::compiler::JoinStrings | ( | std::vector< std::string > | items,
|  | const std::string & | separator
| ) |  |
| static

Definition at line 507 of file compiler.cc.

508 {
509 std::stringstream stream;
510 for (size_t i = 0, count = items.size(); i < count; i++) {
511 const auto is_last = (i == count - 1);
512
513 stream << items[i];
514 if (!is_last) {
515 stream << separator;
516 }
517 }
518 return stream.str();
519 }

Referenced by impeller::compiler::Compiler::CreateDepfileContents().

## ◆ Main()

bool impeller::compiler::Main | ( | const fml::CommandLine & | command_line | ) |

Definition at line 234 of file impellerc_main.cc.

234 {
235 fml::InstallCrashHandler();
236 if (command_line.HasOption("help")) {
237 Switches::PrintHelp(std::cout);
238 return true;
239 }
240
241 Switches switches(command_line);
242 if (!switches.AreValid(std::cerr)) {
243 std::cerr << "Invalid flags specified." << std::endl;
244 Switches::PrintHelp(std::cerr);
245 return false;
246 }
247
248 if (!switches.shader_bundle.empty()) {
249 // Invoke the compiler multiple times to build a shader bundle with the
250 // given shader_bundle spec.
251 return GenerateShaderBundle(switches);
252 }
253
254 std::shared_ptr<fml::FileMapping> source_file_mapping =
255 fml::FileMapping::CreateReadOnly(switches.source_file_name);
256 if (!source_file_mapping) {
257 std::cerr << "Could not open input file." << std::endl;
258 return false;
259 }
260
261 if (switches.iplr && !OutputIPLR(switches, source_file_mapping)) {
262 return false;
263 }
264
265 // Create at least one compiler to output the SL file, reflection data, and a
266 // depfile.
267
268 SourceOptions options = switches.CreateSourceOptions();
269
270 // Invoke the compiler and generate reflection data for a single shader.
271
272 Reflector::Options reflector_options =
273 CreateReflectorOptions(options, switches);
274
275 Compiler compiler(source_file_mapping, options, reflector_options);
276 if (!compiler.IsValid()) {
277 std::cerr << "Compilation failed." << std::endl;
278 std::cerr << compiler.GetErrorMessages() << std::endl;
279 return false;
280 }
281
282 auto spriv_file_name = std::filesystem::absolute(
283 std::filesystem::current_path() / switches.spirv_file_name);
284 if (!fml::WriteAtomically(*switches.working_directory,
285 Utf8FromPath(spriv_file_name).c_str(),
286 *compiler.GetSPIRVAssembly())) {
287 std::cerr << "Could not write file to " << switches.spirv_file_name
288 << std::endl;
289 return false;
290 }
291
292 if (!switches.iplr && !OutputSLFile(compiler, switches)) {
293 return false;
294 }
295
296 if (!OutputReflectionData(compiler, switches, options)) {
297 return false;
298 }
299
300 if (!OutputDepfile(compiler, switches)) {
301 return false;
302 }
303
304 return true;
305 }
impeller::compiler::OutputDepfile
static bool OutputDepfile(const Compiler &compiler, const Switches &switches)
Definition: impellerc_main.cc:196
impeller::compiler::GenerateShaderBundle
bool GenerateShaderBundle(Switches &switches)
Parses the JSON shader bundle configuration and invokes the compiler multiple times to produce a shad...
Definition: shader_bundle.cc:210
impeller::compiler::OutputReflectionData
static bool OutputReflectionData(const Compiler &compiler, const Switches &switches, const SourceOptions &options)
Definition: impellerc_main.cc:144
impeller::compiler::OutputIPLR
static bool OutputIPLR(const Switches &switches, const std::shared_ptr< fml::Mapping > &source_file_mapping)
Definition: impellerc_main.cc:56
impeller::compiler::OutputSLFile
static bool OutputSLFile(const Compiler &compiler, const Switches &switches)
Definition: impellerc_main.cc:126

References impeller::compiler::Switches::AreValid(), CreateReflectorOptions(), impeller::compiler::Switches::CreateSourceOptions(), GenerateShaderBundle(), impeller::compiler::Compiler::GetErrorMessages(), impeller::compiler::Compiler::GetSPIRVAssembly(), impeller::compiler::Switches::iplr, impeller::compiler::Compiler::IsValid(), OutputDepfile(), OutputIPLR(), OutputReflectionData(), OutputSLFile(), impeller::compiler::Switches::PrintHelp(), impeller::compiler::Switches::shader_bundle, impeller::compiler::Switches::source_file_name, impeller::compiler::Switches::spirv_file_name, Utf8FromPath(), and impeller::compiler::Switches::working_directory.

Referenced by main().

## ◆ OutputDepfile()

static bool impeller::compiler::OutputDepfile | ( | const Compiler & | compiler,
|  | const Switches & | switches
| ) |  |
| static

1. Output a depfile.

Definition at line 196 of file impellerc_main.cc.

196 {
197 // --------------------------------------------------------------------------
198 /// 4. Output a depfile.
199 ///
200
201 if (!switches.depfile_path.empty()) {
202 std::string result_file;
203 switch (switches.SelectDefaultTargetPlatform()) {
204 case TargetPlatform::kMetalDesktop:
205 case TargetPlatform::kMetalIOS:
206 case TargetPlatform::kOpenGLES:
207 case TargetPlatform::kOpenGLDesktop:
208 case TargetPlatform::kRuntimeStageMetal:
209 case TargetPlatform::kRuntimeStageGLES:
210 case TargetPlatform::kRuntimeStageGLES3:
211 case TargetPlatform::kRuntimeStageVulkan:
212 case TargetPlatform::kSkSL:
213 case TargetPlatform::kVulkan:
214 result_file = switches.sl_file_name;
215 break;
216 case TargetPlatform::kUnknown:
217 result_file = switches.spirv_file_name;
218 break;
219 }
220 auto depfile_path = std::filesystem::absolute(
221 std::filesystem::current_path() / switches.depfile_path.c_str());
222 if (!fml::WriteAtomically(*switches.working_directory,
223 Utf8FromPath(depfile_path).c_str(),
224 *compiler.CreateDepfileContents({result_file}))) {
225 std::cerr << "Could not write depfile to " << switches.depfile_path
226 << std::endl;
227 return false;
228 }
229 }
230
231 return true;
232 }

References impeller::compiler::Compiler::CreateDepfileContents(), impeller::compiler::Switches::depfile_path, kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, kVulkan, impeller::compiler::Switches::SelectDefaultTargetPlatform(), impeller::compiler::Switches::sl_file_name, impeller::compiler::Switches::spirv_file_name, Utf8FromPath(), and impeller::compiler::Switches::working_directory.

Referenced by Main().

## ◆ OutputIPLR()

static bool impeller::compiler::OutputIPLR | ( | const Switches & | switches,
|  | const std::shared_ptr< fml::Mapping > & | source_file_mapping
| ) |  |
| static

Definition at line 56 of file impellerc_main.cc.

58 {
59 FML_DCHECK(switches.iplr);
60
61 RuntimeStageData stages;
62 std::shared_ptr<RuntimeStageData::Shader> sksl_shader;
63 if (TargetPlatformBundlesSkSL(switches.SelectDefaultTargetPlatform())) {
64 sksl_shader = CompileSkSL(source_file_mapping, switches);
65 if (!sksl_shader) {
66 return false;
67 }
68 stages.AddShader(sksl_shader);
69 }
70
71 for (const auto& platform : switches.PlatformsToCompile()) {
72 if (platform == TargetPlatform::kSkSL) {
73 // Already handled above.
74 continue;
75 }
76 SourceOptions options = switches.CreateSourceOptions(platform);
77
78 // Invoke the compiler and generate reflection data for a single shader.
79
80 Reflector::Options reflector_options =
81 CreateReflectorOptions(options, switches);
82 Compiler compiler(source_file_mapping, options, reflector_options);
83 if (!compiler.IsValid()) {
84 std::cerr << "Compilation failed." << std::endl;
85 std::cerr << compiler.GetErrorMessages() << std::endl;
86 return false;
87 }
88
89 auto reflector = compiler.GetReflector();
90 if (reflector == nullptr) {
91 std::cerr << "Could not create reflector." << std::endl;
92 return false;
93 }
94
95 auto stage_data = reflector->GetRuntimeStageShaderData();
96 if (!stage_data) {
97 std::cerr << "Runtime stage information was nil." << std::endl;
98 return false;
99 }
100
101 stages.AddShader(stage_data);
102 }
103
104 auto stage_data_mapping = switches.json_format ? stages.CreateJsonMapping()
105 : stages.CreateMapping();
106 if (!stage_data_mapping) {
107 std::cerr << "Runtime stage data could not be created." << std::endl;
108 return false;
109 }
110 if (!fml::WriteAtomically(*switches.working_directory, //
111 Utf8FromPath(switches.sl_file_name).c_str(), //
112 *stage_data_mapping //
113 )) {
114 std::cerr << "Could not write file to " << switches.sl_file_name
115 << std::endl;
116 return false;
117 }
118 // Tools that consume the runtime stage data expect the access mode to
119 // be 0644.
120 if (!SetPermissiveAccess(switches.sl_file_name)) {
121 return false;
122 }
123 return true;
124 }
impeller::compiler::TargetPlatformBundlesSkSL
bool TargetPlatformBundlesSkSL(TargetPlatform platform)
Definition: types.cc:328
impeller::compiler::CompileSkSL
static std::shared_ptr< RuntimeStageData::Shader > CompileSkSL(std::shared_ptr< fml::Mapping > source_file_mapping, const Switches &switches)
Definition: impellerc_main.cc:37

References impeller::compiler::RuntimeStageData::AddShader(), CompileSkSL(), impeller::compiler::RuntimeStageData::CreateJsonMapping(), impeller::compiler::RuntimeStageData::CreateMapping(), CreateReflectorOptions(), impeller::compiler::Switches::CreateSourceOptions(), impeller::compiler::Compiler::GetErrorMessages(), impeller::compiler::Compiler::GetReflector(), impeller::compiler::Reflector::GetRuntimeStageShaderData(), impeller::compiler::Switches::iplr, impeller::compiler::Compiler::IsValid(), impeller::compiler::Switches::json_format, kSkSL, impeller::compiler::Switches::PlatformsToCompile(), impeller::compiler::Switches::SelectDefaultTargetPlatform(), SetPermissiveAccess(), impeller::compiler::Switches::sl_file_name, TargetPlatformBundlesSkSL(), Utf8FromPath(), and impeller::compiler::Switches::working_directory.

Referenced by Main().

## ◆ OutputReflectionData()

static bool impeller::compiler::OutputReflectionData | ( | const Compiler & | compiler,
|  | const Switches & | switches,
|  | const SourceOptions & | options
| ) |  |
| static

1. Output shader reflection data. May include a JSON file, a C++ header, and/or a C++ TU.

Definition at line 144 of file impellerc_main.cc.

146 {
147 // --------------------------------------------------------------------------
148 /// 3. Output shader reflection data.
149 /// May include a JSON file, a C++ header, and/or a C++ TU.
150 ///
151
152 if (TargetPlatformNeedsReflection(options.target_platform)) {
153 if (!switches.reflection_json_name.empty()) {
154 auto reflection_json_name = std::filesystem::absolute(
155 std::filesystem::current_path() / switches.reflection_json_name);
156 if (!fml::WriteAtomically(
157 *switches.working_directory,
158 Utf8FromPath(reflection_json_name).c_str(),
159 *compiler.GetReflector()->GetReflectionJSON())) {
160 std::cerr << "Could not write reflection json to "
161 << switches.reflection_json_name << std::endl;
162 return false;
163 }
164 }
165
166 if (!switches.reflection_header_name.empty()) {
167 auto reflection_header_name =
168 std::filesystem::absolute(std::filesystem::current_path() /
169 switches.reflection_header_name.c_str());
170 if (!fml::WriteAtomically(
171 *switches.working_directory,
172 Utf8FromPath(reflection_header_name).c_str(),
173 *compiler.GetReflector()->GetReflectionHeader())) {
174 std::cerr << "Could not write reflection header to "
175 << switches.reflection_header_name << std::endl;
176 return false;
177 }
178 }
179
180 if (!switches.reflection_cc_name.empty()) {
181 auto reflection_cc_name =
182 std::filesystem::absolute(std::filesystem::current_path() /
183 switches.reflection_cc_name.c_str());
184 if (!fml::WriteAtomically(*switches.working_directory,
185 Utf8FromPath(reflection_cc_name).c_str(),
186 *compiler.GetReflector()->GetReflectionCC())) {
187 std::cerr << "Could not write reflection CC to "
188 << switches.reflection_cc_name << std::endl;
189 return false;
190 }
191 }
192 }
193 return true;
194 }
impeller::compiler::TargetPlatformNeedsReflection
bool TargetPlatformNeedsReflection(TargetPlatform platform)
Definition: types.cc:143

References impeller::compiler::Reflector::GetReflectionCC(), impeller::compiler::Reflector::GetReflectionHeader(), impeller::compiler::Reflector::GetReflectionJSON(), impeller::compiler::Compiler::GetReflector(), impeller::compiler::Switches::reflection_cc_name, impeller::compiler::Switches::reflection_header_name, impeller::compiler::Switches::reflection_json_name, impeller::compiler::SourceOptions::target_platform, TargetPlatformNeedsReflection(), Utf8FromPath(), and impeller::compiler::Switches::working_directory.

Referenced by Main().

## ◆ OutputSLFile()

static bool impeller::compiler::OutputSLFile | ( | const Compiler & | compiler,
|  | const Switches & | switches
| ) |  |
| static

1. Output the source file. When in IPLR/RuntimeStage mode, output the serialized IPLR flatbuffer.

Definition at line 126 of file impellerc_main.cc.

126 {
127 // --------------------------------------------------------------------------
128 /// 2. Output the source file. When in IPLR/RuntimeStage mode, output the
129 /// serialized IPLR flatbuffer.
130 ///
131
132 auto sl_file_name = std::filesystem::absolute(
133 std::filesystem::current_path() / switches.sl_file_name);
134 if (!fml::WriteAtomically(*switches.working_directory,
135 Utf8FromPath(sl_file_name).c_str(),
136 *compiler.GetSLShaderSource())) {
137 std::cerr << "Could not write file to " << switches.sl_file_name
138 << std::endl;
139 return false;
140 }
141 return true;
142 }

References impeller::compiler::Compiler::GetSLShaderSource(), impeller::compiler::Switches::sl_file_name, Utf8FromPath(), and impeller::compiler::Switches::working_directory.

Referenced by Main().

## ◆ ParseMSLVersion()

static uint32_t impeller::compiler::ParseMSLVersion | ( | const std::string & | msl_version | ) |
| static

Definition at line 40 of file compiler.cc.

40 {
41 std::stringstream sstream(msl_version);
42 std::string version_part;
43 uint32_t major = 1;
44 uint32_t minor = 2;
45 uint32_t patch = 0;
46 if (std::getline(sstream, version_part, '.')) {
47 major = std::stoi(version_part);
48 if (std::getline(sstream, version_part, '.')) {
49 minor = std::stoi(version_part);
50 if (std::getline(sstream, version_part, '.')) {
51 patch = std::stoi(version_part);
52 }
53 }
54 }
55 if (major < 1 || (major == 1 && minor < 2)) {
56 std::cerr << "--metal-version version must be at least 1.2. Have "
57 << msl_version << std::endl;
58 }
59 return spirv_cross::CompilerMSL::Options::make_msl_version(major, minor,
60 patch);
61 }

## ◆ ParseShaderBundleConfig()

std::optional< ShaderBundleConfig > impeller::compiler::ParseShaderBundleConfig | ( | const std::string & | bundle_config_json,
|  | std::ostream & | error_stream
| ) |  |

Parse a shader bundle configuration from a given JSON string.

Note
  Exposed only for testing purposes. Use `GenerateShaderBundle` directly.

Definition at line 19 of file shader_bundle.cc.

21 {
22 auto json = nlohmann::json::parse(bundle_config_json, nullptr, false);
23 if (json.is_discarded() || !json.is_object()) {
24 error_stream << "The shader bundle is not a valid JSON object."
25 << std::endl;
26 return std::nullopt;
27 }
28
29 ShaderBundleConfig bundle;
30 for (auto& [shader_name, shader_value] : json.items()) {
31 if (bundle.find(shader_name) != bundle.end()) {
32 error_stream << "Duplicate shader \"" << shader_name << "\"."
33 << std::endl;
34 return std::nullopt;
35 }
36 if (!shader_value.is_object()) {
37 error_stream << "Invalid shader entry \"" << shader_name
38 << "\": Entry is not a JSON object." << std::endl;
39 return std::nullopt;
40 }
41
42 ShaderConfig shader;
43
44 if (!shader_value.contains("file")) {
45 error_stream << "Invalid shader entry \"" << shader_name
46 << "\": Missing required \"file\" field." << std::endl;
47 return std::nullopt;
48 }
49 shader.source_file_name = shader_value["file"];
50
51 if (!shader_value.contains("type")) {
52 error_stream << "Invalid shader entry \"" << shader_name
53 << "\": Missing required \"type\" field." << std::endl;
54 return std::nullopt;
55 }
56 shader.type = SourceTypeFromString(shader_value["type"]);
57 if (shader.type == SourceType::kUnknown) {
58 error_stream << "Invalid shader entry \"" << shader_name
59 << "\": Shader type " << shader_value["type"]
60 << " is unknown." << std::endl;
61 return std::nullopt;
62 }
63
64 shader.language = shader_value.contains("language")
65 ? ToSourceLanguage(shader_value["language"])
66 : SourceLanguage::kGLSL;
67 if (shader.language == SourceLanguage::kUnknown) {
68 error_stream << "Invalid shader entry \"" << shader_name
69 << "\": Unknown language type " << shader_value["language"]
70 << "." << std::endl;
71 return std::nullopt;
72 }
73
74 shader.entry_point = shader_value.contains("entry_point")
75 ? shader_value["entry_point"]
76 : "main";
77
78 bundle[shader_name] = shader;
79 }
80
81 return bundle;
82 }
impeller::compiler::SourceLanguage
SourceLanguage
Definition: types.h:42
impeller::compiler::ShaderBundleConfig
std::unordered_map< std::string, ShaderConfig > ShaderBundleConfig
Definition: types.h:82
impeller::compiler::SourceTypeFromString
SourceType SourceTypeFromString(std::string name)
Definition: types.cc:46
impeller::compiler::ToSourceLanguage
SourceLanguage ToSourceLanguage(const std::string &source_language)
Definition: types.cc:64

References impeller::compiler::ShaderConfig::entry_point, kGLSL, kUnknown, impeller::compiler::ShaderConfig::language, impeller::compiler::ShaderConfig::source_file_name, SourceTypeFromString(), ToSourceLanguage(), and impeller::compiler::ShaderConfig::type.

Referenced by GenerateShaderBundleFlatbuffer(), and impeller::compiler::testing::TEST().

## ◆ ReadKnownScalarType()

static std::optional<KnownType> impeller::compiler::ReadKnownScalarType | ( | spirv_cross::SPIRType::BaseType | type | ) |
| static

Definition at line 754 of file reflector.cc.

755 {
756 switch (type) {
757 case spirv_cross::SPIRType::BaseType::Boolean:
758 return KnownType{
759 .name = "bool",
760 .byte_size = sizeof(bool),
761 };
762 case spirv_cross::SPIRType::BaseType::Float:
763 return KnownType{
764 .name = "Scalar",
765 .byte_size = sizeof(Scalar),
766 };
767 case spirv_cross::SPIRType::BaseType::Half:
768 return KnownType{
769 .name = "Half",
770 .byte_size = sizeof(Half),
771 };
772 case spirv_cross::SPIRType::BaseType::UInt:
773 return KnownType{
774 .name = "uint32_t",
775 .byte_size = sizeof(uint32_t),
776 };
777 case spirv_cross::SPIRType::BaseType::Int:
778 return KnownType{
779 .name = "int32_t",
780 .byte_size = sizeof(int32_t),
781 };
782 default:
783 break;
784 }
785 return std::nullopt;
786 }
impeller::Scalar
float Scalar
Definition: scalar.h:18

References impeller::compiler::KnownType::name, and type.

## ◆ report_and_exit()

void impeller::compiler::report_and_exit | ( | const std::string & | msg | ) |

Definition at line 16 of file spirv_sksl.cc.

16 {
17 fprintf(stderr, "There was a compiler error: %s\n", msg.c_str());
18 fflush(stderr);
19 exit(1);
20 }

## ◆ RuntimeStageBackendToString()

static std::string impeller::compiler::RuntimeStageBackendToString | ( | RuntimeStageBackend | backend | ) |
| static

Definition at line 197 of file runtime_stage_data.cc.

197 {
198 switch (backend) {
199 case RuntimeStageBackend::kSkSL:
200 return "sksl";
201 case RuntimeStageBackend::kMetal:
202 return "metal";
203 case RuntimeStageBackend::kOpenGLES:
204 return "opengles";
205 case RuntimeStageBackend::kVulkan:
206 return "vulkan";
207 case RuntimeStageBackend::kOpenGLES3:
208 return "opengles3";
209 }
210 }

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

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ RuntimeStagesFromCommandLine()

static std::vector<TargetPlatform> impeller::compiler::RuntimeStagesFromCommandLine | ( | const fml::CommandLine & | command_line | ) |
| static

Definition at line 138 of file switches.cc.

139 {
140 std::vector<TargetPlatform> stages;
141 for (const auto& platform : kKnownRuntimeStages) {
142 if (command_line.HasOption(platform.first)) {
143 stages.push_back(platform.second);
144 }
145 }
146 return stages;
147 }
impeller::compiler::kKnownRuntimeStages
static const std::map< std::string, TargetPlatform > kKnownRuntimeStages
Definition: switches.cc:28

References kKnownRuntimeStages.

## ◆ SetBindingBaseOffset()

static void impeller::compiler::SetBindingBaseOffset | ( | shaderc::CompileOptions & | options | ) |
| static

Definition at line 210 of file spirv_compiler.cc.

210 {
211 constexpr uint32_t kBindingBaseOffset = 64;
212 static const shaderc_uniform_kind kUniformKinds[] = {
213 shaderc_uniform_kind::shaderc_uniform_kind_sampler,
214 shaderc_uniform_kind::shaderc_uniform_kind_texture,
215 shaderc_uniform_kind::shaderc_uniform_kind_image,
216 shaderc_uniform_kind::shaderc_uniform_kind_buffer, // UBOs
217 shaderc_uniform_kind::shaderc_uniform_kind_storage_buffer, // SSBOs
218 };
219
220 for (size_t i = 0u; i < sizeof(kUniformKinds) / sizeof(shaderc_uniform_kind);
221 i++) {
222 options.SetBindingBaseForStage(
223 shaderc_shader_kind::shaderc_fragment_shader, //
224 kUniformKinds[i], //
225 kBindingBaseOffset //
226 );
227 }
228 }

Referenced by impeller::compiler::SPIRVCompilerOptions::BuildShadercOptions().

## ◆ SetDefaultLimitations()

static void impeller::compiler::SetDefaultLimitations | ( | shaderc::CompileOptions & | compiler_opts | ) |
| static

Definition at line 92 of file spirv_compiler.cc.

92 {
93 using Limit = std::pair<shaderc_limit, int>;
94 static constexpr std::array<Limit, 83> limits = {
95 Limit{shaderc_limit::shaderc_limit_max_lights, 8},
96 Limit{shaderc_limit::shaderc_limit_max_clip_planes, 6},
97 Limit{shaderc_limit::shaderc_limit_max_texture_units, 2},
98 Limit{shaderc_limit::shaderc_limit_max_texture_coords, 8},
99 Limit{shaderc_limit::shaderc_limit_max_vertex_attribs, 16},
100 Limit{shaderc_limit::shaderc_limit_max_vertex_uniform_components, 4096},
101 Limit{shaderc_limit::shaderc_limit_max_varying_floats, 60},
102 Limit{shaderc_limit::shaderc_limit_max_vertex_texture_image_units, 16},
103 Limit{shaderc_limit::shaderc_limit_max_combined_texture_image_units, 80},
104 Limit{shaderc_limit::shaderc_limit_max_texture_image_units, 16},
105 Limit{shaderc_limit::shaderc_limit_max_fragment_uniform_components, 1024},
106 Limit{shaderc_limit::shaderc_limit_max_draw_buffers, 8},
107 Limit{shaderc_limit::shaderc_limit_max_vertex_uniform_vectors, 256},
108 Limit{shaderc_limit::shaderc_limit_max_varying_vectors, 15},
109 Limit{shaderc_limit::shaderc_limit_max_fragment_uniform_vectors, 256},
110 Limit{shaderc_limit::shaderc_limit_max_vertex_output_vectors, 16},
111 Limit{shaderc_limit::shaderc_limit_max_fragment_input_vectors, 15},
112 Limit{shaderc_limit::shaderc_limit_min_program_texel_offset, -8},
113 Limit{shaderc_limit::shaderc_limit_max_program_texel_offset, 7},
114 Limit{shaderc_limit::shaderc_limit_max_clip_distances, 8},
115 Limit{shaderc_limit::shaderc_limit_max_compute_work_group_count_x, 65535},
116 Limit{shaderc_limit::shaderc_limit_max_compute_work_group_count_y, 65535},
117 Limit{shaderc_limit::shaderc_limit_max_compute_work_group_count_z, 65535},
118 Limit{shaderc_limit::shaderc_limit_max_compute_work_group_size_x, 1024},
119 Limit{shaderc_limit::shaderc_limit_max_compute_work_group_size_y, 1024},
120 Limit{shaderc_limit::shaderc_limit_max_compute_work_group_size_z, 64},
121 Limit{shaderc_limit::shaderc_limit_max_compute_uniform_components, 512},
122 Limit{shaderc_limit::shaderc_limit_max_compute_texture_image_units, 16},
123 Limit{shaderc_limit::shaderc_limit_max_compute_image_uniforms, 8},
124 Limit{shaderc_limit::shaderc_limit_max_compute_atomic_counters, 8},
125 Limit{shaderc_limit::shaderc_limit_max_compute_atomic_counter_buffers, 1},
126 Limit{shaderc_limit::shaderc_limit_max_varying_components, 60},
127 Limit{shaderc_limit::shaderc_limit_max_vertex_output_components, 64},
128 Limit{shaderc_limit::shaderc_limit_max_geometry_input_components, 64},
129 Limit{shaderc_limit::shaderc_limit_max_geometry_output_components, 128},
130 Limit{shaderc_limit::shaderc_limit_max_fragment_input_components, 128},
131 Limit{shaderc_limit::shaderc_limit_max_image_units, 8},
132 Limit{shaderc_limit::
133 shaderc_limit_max_combined_image_units_and_fragment_outputs,
134 8},
135 Limit{shaderc_limit::shaderc_limit_max_combined_shader_output_resources,
136 8},
137 Limit{shaderc_limit::shaderc_limit_max_image_samples, 0},
138 Limit{shaderc_limit::shaderc_limit_max_vertex_image_uniforms, 0},
139 Limit{shaderc_limit::shaderc_limit_max_tess_control_image_uniforms, 0},
140 Limit{shaderc_limit::shaderc_limit_max_tess_evaluation_image_uniforms, 0},
141 Limit{shaderc_limit::shaderc_limit_max_geometry_image_uniforms, 0},
142 Limit{shaderc_limit::shaderc_limit_max_fragment_image_uniforms, 8},
143 Limit{shaderc_limit::shaderc_limit_max_combined_image_uniforms, 8},
144 Limit{shaderc_limit::shaderc_limit_max_geometry_texture_image_units, 16},
145 Limit{shaderc_limit::shaderc_limit_max_geometry_output_vertices, 256},
146 Limit{shaderc_limit::shaderc_limit_max_geometry_total_output_components,
147 1024},
148 Limit{shaderc_limit::shaderc_limit_max_geometry_uniform_components, 512},
149 Limit{shaderc_limit::shaderc_limit_max_geometry_varying_components, 60},
150 Limit{shaderc_limit::shaderc_limit_max_tess_control_input_components,
151 128},
152 Limit{shaderc_limit::shaderc_limit_max_tess_control_output_components,
153 128},
154 Limit{shaderc_limit::shaderc_limit_max_tess_control_texture_image_units,
155 16},
156 Limit{shaderc_limit::shaderc_limit_max_tess_control_uniform_components,
157 1024},
158 Limit{
159 shaderc_limit::shaderc_limit_max_tess_control_total_output_components,
160 4096},
161 Limit{shaderc_limit::shaderc_limit_max_tess_evaluation_input_components,
162 128},
163 Limit{shaderc_limit::shaderc_limit_max_tess_evaluation_output_components,
164 128},
165 Limit{
166 shaderc_limit::shaderc_limit_max_tess_evaluation_texture_image_units,
167 16},
168 Limit{shaderc_limit::shaderc_limit_max_tess_evaluation_uniform_components,
169 1024},
170 Limit{shaderc_limit::shaderc_limit_max_tess_patch_components, 120},
171 Limit{shaderc_limit::shaderc_limit_max_patch_vertices, 32},
172 Limit{shaderc_limit::shaderc_limit_max_tess_gen_level, 64},
173 Limit{shaderc_limit::shaderc_limit_max_viewports, 16},
174 Limit{shaderc_limit::shaderc_limit_max_vertex_atomic_counters, 0},
175 Limit{shaderc_limit::shaderc_limit_max_tess_control_atomic_counters, 0},
176 Limit{shaderc_limit::shaderc_limit_max_tess_evaluation_atomic_counters,
177 0},
178 Limit{shaderc_limit::shaderc_limit_max_geometry_atomic_counters, 0},
179 Limit{shaderc_limit::shaderc_limit_max_fragment_atomic_counters, 8},
180 Limit{shaderc_limit::shaderc_limit_max_combined_atomic_counters, 8},
181 Limit{shaderc_limit::shaderc_limit_max_atomic_counter_bindings, 1},
182 Limit{shaderc_limit::shaderc_limit_max_vertex_atomic_counter_buffers, 0},
183 Limit{
184 shaderc_limit::shaderc_limit_max_tess_control_atomic_counter_buffers,
185 0},
186 Limit{shaderc_limit::
187 shaderc_limit_max_tess_evaluation_atomic_counter_buffers,
188 0},
189 Limit{shaderc_limit::shaderc_limit_max_geometry_atomic_counter_buffers,
190 0},
191 Limit{shaderc_limit::shaderc_limit_max_fragment_atomic_counter_buffers,
192 0},
193 Limit{shaderc_limit::shaderc_limit_max_combined_atomic_counter_buffers,
194 1},
195 Limit{shaderc_limit::shaderc_limit_max_atomic_counter_buffer_size, 32},
196 Limit{shaderc_limit::shaderc_limit_max_transform_feedback_buffers, 4},
197 Limit{shaderc_limit::
198 shaderc_limit_max_transform_feedback_interleaved_components,
199 64},
200 Limit{shaderc_limit::shaderc_limit_max_cull_distances, 8},
201 Limit{shaderc_limit::shaderc_limit_max_combined_clip_and_cull_distances,
202 8},
203 Limit{shaderc_limit::shaderc_limit_max_samples, 4},
204 };
205 for (auto& [limit, value] : limits) {
206 compiler_opts.SetLimit(limit, value);
207 }
208 }
value
int32_t value
Definition: dl_golden_unittests.cc:459

References value.

Referenced by impeller::compiler::SPIRVCompilerOptions::BuildShadercOptions().

## ◆ SetPermissiveAccess()

bool impeller::compiler::SetPermissiveAccess | ( | const std::filesystem::path & | p | ) |

Sets the file access mode of the file at path 'p' to 0644.

Definition at line 16 of file utilities.cc.

16 {
17 auto permissions =
18 std::filesystem::perms::owner_read | std::filesystem::perms::owner_write |
19 std::filesystem::perms::group_read | std::filesystem::perms::others_read;
20 std::error_code error;
21 std::filesystem::permissions(p, permissions, error);
22 if (error) {
23 std::cerr << "Failed to set access on file '" << p
24 << "': " << error.message() << std::endl;
25 return false;
26 }
27 return true;
28 }

Referenced by GenerateShaderBundle(), and OutputIPLR().

## ◆ ShaderCErrorToString()

std::string impeller::compiler::ShaderCErrorToString | ( | shaderc_compilation_status | status | ) |

Definition at line 162 of file types.cc.

162 {
163 using Status = shaderc_compilation_status;
164 switch (status) {
165 case Status::shaderc_compilation_status_success:
166 return "Success";
167 case Status::shaderc_compilation_status_invalid_stage:
168 return "Invalid shader stage specified";
169 case Status::shaderc_compilation_status_compilation_error:
170 return "Compilation error";
171 case Status::shaderc_compilation_status_internal_error:
172 return "Internal error";
173 case Status::shaderc_compilation_status_null_result_object:
174 return "Internal error. Null result object";
175 case Status::shaderc_compilation_status_invalid_assembly:
176 return "Invalid assembly";
177 case Status::shaderc_compilation_status_validation_error:
178 return "Validation error";
179 case Status::shaderc_compilation_status_transformation_error:
180 return "Transform error";
181 case Status::shaderc_compilation_status_configuration_error:
182 return "Configuration error";
183 }
184 return "Unknown internal error";
185 }

Referenced by impeller::compiler::SPIRVCompiler::CompileToSPV().

## ◆ SourceLanguageToString()

std::string impeller::compiler::SourceLanguageToString | ( | SourceLanguage | source_language | ) |

Definition at line 102 of file types.cc.

102 {
103 switch (source_language) {
104 case SourceLanguage::kUnknown:
105 return "Unknown";
106 case SourceLanguage::kGLSL:
107 return "GLSL";
108 case SourceLanguage::kHLSL:
109 return "HLSL";
110 }
111 }

References kGLSL, kHLSL, and kUnknown.

Referenced by impeller::compiler::SPIRVCompiler::CompileToSPV().

## ◆ SourceTypeFromCommandLine()

static SourceType impeller::compiler::SourceTypeFromCommandLine | ( | const fml::CommandLine & | command_line | ) |
| static

Definition at line 149 of file switches.cc.

150 {
151 auto source_type_option =
152 command_line.GetOptionValueWithDefault("input-type", "");
153 auto source_type_search = kKnownSourceTypes.find(source_type_option);
154 if (source_type_search == kKnownSourceTypes.end()) {
155 return SourceType::kUnknown;
156 }
157 return source_type_search->second;
158 }
impeller::compiler::kKnownSourceTypes
static const std::map< std::string, SourceType > kKnownSourceTypes
Definition: switches.cc:36

References kKnownSourceTypes, and kUnknown.

## ◆ SourceTypeFromFileName()

SourceType impeller::compiler::SourceTypeFromFileName | ( | const std::string & | file_name | ) |

Definition at line 30 of file types.cc.

30 {
31 if (StringEndWith(file_name, ".vert")) {
32 return SourceType::kVertexShader;
33 }
34
35 if (StringEndWith(file_name, ".frag")) {
36 return SourceType::kFragmentShader;
37 }
38
39 if (StringEndWith(file_name, ".comp")) {
40 return SourceType::kComputeShader;
41 }
42
43 return SourceType::kUnknown;
44 }
impeller::compiler::StringEndWith
static bool StringEndWith(const std::string &string, const std::string &suffix)
Definition: types.cc:17

References kComputeShader, kFragmentShader, kUnknown, kVertexShader, and StringEndWith().

Referenced by impeller::compiler::testing::CompilerTest::CanCompileAndReflect(), impeller::compiler::Switches::CreateSourceOptions(), and impeller::compiler::testing::TEST().

## ◆ SourceTypeFromString()

SourceType impeller::compiler::SourceTypeFromString | ( | std::string | name | ) |

Definition at line 46 of file types.cc.

46 {
47 name = ToLowerCase(name);
48
49 if (name == "vertex") {
50 return SourceType::kVertexShader;
51 }
52
53 if (name == "fragment") {
54 return SourceType::kFragmentShader;
55 }
56
57 if (name == "compute") {
58 return SourceType::kComputeShader;
59 }
60
61 return SourceType::kUnknown;
62 }
impeller::compiler::ToLowerCase
std::string ToLowerCase(std::string_view string)
Definition: utilities.cc:62

References kComputeShader, kFragmentShader, kUnknown, kVertexShader, and ToLowerCase().

Referenced by ParseShaderBundleConfig().

## ◆ SourceTypeToString()

std::string impeller::compiler::SourceTypeToString | ( | SourceType | type | ) |

Definition at line 236 of file types.cc.

236 {
237 switch (type) {
238 case SourceType::kUnknown:
239 return "unknown";
240 case SourceType::kVertexShader:
241 return "vert";
242 case SourceType::kFragmentShader:
243 return "frag";
244 case SourceType::kComputeShader:
245 return "comp";
246 }
247 FML_UNREACHABLE();
248 }

References kComputeShader, kFragmentShader, kUnknown, kVertexShader, and type.

## ◆ StringEndWith()

static bool impeller::compiler::StringEndWith | ( | const std::string & | string,
|  | const std::string & | suffix
| ) |  |
| static

Definition at line 17 of file types.cc.

18 {
19 if (suffix.size() > string.size()) {
20 return false;
21 }
22
23 if (suffix.empty() || suffix.empty()) {
24 return false;
25 }
26
27 return string.rfind(suffix) == (string.size() - suffix.size());
28 }

Referenced by SourceTypeFromFileName().

## ◆ StringStartsWith()

bool impeller::compiler::StringStartsWith | ( | const std::string & | target,
|  | const std::string & | prefix
| ) |  |

Definition at line 87 of file utilities.cc.

87 {
88 if (prefix.length() > target.length()) {
89 return false;
90 }
91 for (size_t i = 0; i < prefix.length(); i++) {
92 if (target[i] != prefix[i]) {
93 return false;
94 }
95 }
96 return true;
97 }

Referenced by CreateGLSLCompiler().

## ◆ StringToShaderStage()

static std::string impeller::compiler::StringToShaderStage | ( | const std::string & | str | ) |
| static

Definition at line 46 of file reflector.cc.

46 {
47 if (str == "vertex") {
48 return "ShaderStage::kVertex";
49 }
50
51 if (str == "fragment") {
52 return "ShaderStage::kFragment";
53 }
54
55 if (str == "compute") {
56 return "ShaderStage::kCompute";
57 }
58
59 return "ShaderStage::kUnknown";
60 }

## ◆ TargetPlatformBundlesSkSL()

bool impeller::compiler::TargetPlatformBundlesSkSL | ( | TargetPlatform | platform | ) |

Definition at line 328 of file types.cc.

328 {
329 switch (platform) {
330 case TargetPlatform::kSkSL:
331 case TargetPlatform::kRuntimeStageMetal:
332 case TargetPlatform::kRuntimeStageGLES:
333 case TargetPlatform::kRuntimeStageGLES3:
334 case TargetPlatform::kRuntimeStageVulkan:
335 return true;
336 case TargetPlatform::kMetalDesktop:
337 case TargetPlatform::kMetalIOS:
338 case TargetPlatform::kUnknown:
339 case TargetPlatform::kOpenGLES:
340 case TargetPlatform::kOpenGLDesktop:
341 case TargetPlatform::kVulkan:
342 return false;
343 }
344 FML_UNREACHABLE();
345 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

Referenced by OutputIPLR().

## ◆ TargetPlatformFromCommandLine()

static TargetPlatform impeller::compiler::TargetPlatformFromCommandLine | ( | const fml::CommandLine & | command_line | ) |
| static

Definition at line 120 of file switches.cc.

121 {
122 auto target = TargetPlatform::kUnknown;
123 for (const auto& platform : kKnownPlatforms) {
124 if (command_line.HasOption(platform.first)) {
125 // If the platform has already been determined, the caller may have
126 // specified multiple platforms. This is an error and only one must be
127 // selected.
128 if (target != TargetPlatform::kUnknown) {
129 return TargetPlatform::kUnknown;
130 }
131 target = platform.second;
132 // Keep going to detect duplicates.
133 }
134 }
135 return target;
136 }
impeller::compiler::kKnownPlatforms
static const std::map< std::string, TargetPlatform > kKnownPlatforms
Definition: switches.cc:20

References kKnownPlatforms, and kUnknown.

## ◆ TargetPlatformIsMetal()

bool impeller::compiler::TargetPlatformIsMetal | ( | TargetPlatform | platform | ) |

Definition at line 290 of file types.cc.

290 {
291 switch (platform) {
292 case TargetPlatform::kMetalDesktop:
293 case TargetPlatform::kMetalIOS:
294 case TargetPlatform::kRuntimeStageMetal:
295 return true;
296 case TargetPlatform::kUnknown:
297 case TargetPlatform::kSkSL:
298 case TargetPlatform::kOpenGLES:
299 case TargetPlatform::kOpenGLDesktop:
300 case TargetPlatform::kRuntimeStageGLES:
301 case TargetPlatform::kRuntimeStageGLES3:
302 case TargetPlatform::kRuntimeStageVulkan:
303 case TargetPlatform::kVulkan:
304 return false;
305 }
306 FML_UNREACHABLE();
307 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

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

## ◆ TargetPlatformIsOpenGL()

bool impeller::compiler::TargetPlatformIsOpenGL | ( | TargetPlatform | platform | ) |

Definition at line 271 of file types.cc.

271 {
272 switch (platform) {
273 case TargetPlatform::kOpenGLES:
274 case TargetPlatform::kOpenGLDesktop:
275 case TargetPlatform::kRuntimeStageGLES:
276 case TargetPlatform::kRuntimeStageGLES3:
277 return true;
278 case TargetPlatform::kMetalDesktop:
279 case TargetPlatform::kRuntimeStageMetal:
280 case TargetPlatform::kRuntimeStageVulkan:
281 case TargetPlatform::kMetalIOS:
282 case TargetPlatform::kUnknown:
283 case TargetPlatform::kSkSL:
284 case TargetPlatform::kVulkan:
285 return false;
286 }
287 FML_UNREACHABLE();
288 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

## ◆ TargetPlatformIsVulkan()

bool impeller::compiler::TargetPlatformIsVulkan | ( | TargetPlatform | platform | ) |

Definition at line 309 of file types.cc.

309 {
310 switch (platform) {
311 case TargetPlatform::kRuntimeStageVulkan:
312 case TargetPlatform::kVulkan:
313 return true;
314 case TargetPlatform::kMetalDesktop:
315 case TargetPlatform::kMetalIOS:
316 case TargetPlatform::kRuntimeStageMetal:
317 case TargetPlatform::kUnknown:
318 case TargetPlatform::kSkSL:
319 case TargetPlatform::kOpenGLES:
320 case TargetPlatform::kOpenGLDesktop:
321 case TargetPlatform::kRuntimeStageGLES:
322 case TargetPlatform::kRuntimeStageGLES3:
323 return false;
324 }
325 FML_UNREACHABLE();
326 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

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

## ◆ TargetPlatformNeedsReflection()

bool impeller::compiler::TargetPlatformNeedsReflection | ( | TargetPlatform | platform | ) |

Definition at line 143 of file types.cc.

143 {
144 switch (platform) {
145 case TargetPlatform::kMetalIOS:
146 case TargetPlatform::kMetalDesktop:
147 case TargetPlatform::kOpenGLES:
148 case TargetPlatform::kOpenGLDesktop:
149 case TargetPlatform::kRuntimeStageMetal:
150 case TargetPlatform::kRuntimeStageGLES:
151 case TargetPlatform::kRuntimeStageGLES3:
152 case TargetPlatform::kRuntimeStageVulkan:
153 case TargetPlatform::kVulkan:
154 return true;
155 case TargetPlatform::kUnknown:
156 case TargetPlatform::kSkSL:
157 return false;
158 }
159 FML_UNREACHABLE();
160 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

Referenced by impeller::compiler::testing::CompilerTest::CanCompileAndReflect(), and OutputReflectionData().

## ◆ TargetPlatformSLExtension()

std::string impeller::compiler::TargetPlatformSLExtension | ( | TargetPlatform | platform | ) |

Definition at line 250 of file types.cc.

250 {
251 switch (platform) {
252 case TargetPlatform::kUnknown:
253 return "unknown";
254 case TargetPlatform::kMetalDesktop:
255 case TargetPlatform::kMetalIOS:
256 case TargetPlatform::kRuntimeStageMetal:
257 return "metal";
258 case TargetPlatform::kSkSL:
259 case TargetPlatform::kOpenGLES:
260 case TargetPlatform::kOpenGLDesktop:
261 case TargetPlatform::kRuntimeStageGLES:
262 case TargetPlatform::kRuntimeStageGLES3:
263 return "glsl";
264 case TargetPlatform::kVulkan:
265 case TargetPlatform::kRuntimeStageVulkan:
266 return "vk.spirv";
267 }
268 FML_UNREACHABLE();
269 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

Referenced by impeller::compiler::testing::SLFileName().

## ◆ TargetPlatformToMSLPlatform()

spirv_cross::CompilerMSL::Options::Platform impeller::compiler::TargetPlatformToMSLPlatform | ( | TargetPlatform | platform | ) |

Definition at line 215 of file types.cc.

216 {
217 switch (platform) {
218 case TargetPlatform::kMetalIOS:
219 case TargetPlatform::kRuntimeStageMetal:
220 return spirv_cross::CompilerMSL::Options::Platform::iOS;
221 case TargetPlatform::kMetalDesktop:
222 return spirv_cross::CompilerMSL::Options::Platform::macOS;
223 case TargetPlatform::kSkSL:
224 case TargetPlatform::kOpenGLES:
225 case TargetPlatform::kOpenGLDesktop:
226 case TargetPlatform::kRuntimeStageGLES:
227 case TargetPlatform::kRuntimeStageGLES3:
228 case TargetPlatform::kRuntimeStageVulkan:
229 case TargetPlatform::kVulkan:
230 case TargetPlatform::kUnknown:
231 return spirv_cross::CompilerMSL::Options::Platform::macOS;
232 }
233 FML_UNREACHABLE();
234 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

## ◆ TargetPlatformToString()

std::string impeller::compiler::TargetPlatformToString | ( | TargetPlatform | platform | ) |

Definition at line 74 of file types.cc.

74 {
75 switch (platform) {
76 case TargetPlatform::kUnknown:
77 return "Unknown";
78 case TargetPlatform::kMetalDesktop:
79 return "MetalDesktop";
80 case TargetPlatform::kMetalIOS:
81 return "MetaliOS";
82 case TargetPlatform::kOpenGLES:
83 return "OpenGLES";
84 case TargetPlatform::kOpenGLDesktop:
85 return "OpenGLDesktop";
86 case TargetPlatform::kVulkan:
87 return "Vulkan";
88 case TargetPlatform::kRuntimeStageMetal:
89 return "RuntimeStageMetal";
90 case TargetPlatform::kRuntimeStageGLES:
91 return "RuntimeStageGLES";
92 case TargetPlatform::kRuntimeStageGLES3:
93 return "RuntimeStageGLES3";
94 case TargetPlatform::kRuntimeStageVulkan:
95 return "RuntimeStageVulkan";
96 case TargetPlatform::kSkSL:
97 return "SkSL";
98 }
99 FML_UNREACHABLE();
100 }

References kMetalDesktop, kMetalIOS, kOpenGLDesktop, kOpenGLES, kRuntimeStageGLES, kRuntimeStageGLES3, kRuntimeStageMetal, kRuntimeStageVulkan, kSkSL, kUnknown, and kVulkan.

## ◆ ToCamelCase()

std::string impeller::compiler::ToCamelCase | ( | std::string_view | string | ) |

Definition at line 39 of file utilities.cc.

39 {
40 if (string.empty()) {
41 return "";
42 }
43
44 std::stringstream stream;
45 bool next_upper = true;
46 for (size_t i = 0, count = string.length(); i < count; i++) {
47 auto ch = string.data()[i];
48 if (next_upper) {
49 next_upper = false;
50 stream << static_cast<char>(std::toupper(ch));
51 continue;
52 }
53 if (ch == '_') {
54 next_upper = true;
55 continue;
56 }
57 stream << ch;
58 }
59 return stream.str();
60 }

## ◆ ToExecutionModel()

spv::ExecutionModel impeller::compiler::ToExecutionModel | ( | SourceType | type | ) |

Definition at line 201 of file types.cc.

201 {
202 switch (type) {
203 case SourceType::kVertexShader:
204 return spv::ExecutionModel::ExecutionModelVertex;
205 case SourceType::kFragmentShader:
206 return spv::ExecutionModel::ExecutionModelFragment;
207 case SourceType::kComputeShader:
208 return spv::ExecutionModel::ExecutionModelGLCompute;
209 case SourceType::kUnknown:
210 break;
211 }
212 return spv::ExecutionModel::ExecutionModelMax;
213 }

References kComputeShader, kFragmentShader, kUnknown, kVertexShader, and type.

Referenced by CreateCompiler().

## ◆ ToInputType() [1/2]

static std::optional<fb::InputDataType> impeller::compiler::ToInputType | ( | spirv_cross::SPIRType::BaseType | type | ) |
| static

Definition at line 95 of file runtime_stage_data.cc.

96 {
97 switch (type) {
98 case spirv_cross::SPIRType::Boolean:
99 return fb::InputDataType::kBoolean;
100 case spirv_cross::SPIRType::SByte:
101 return fb::InputDataType::kSignedByte;
102 case spirv_cross::SPIRType::UByte:
103 return fb::InputDataType::kUnsignedByte;
104 case spirv_cross::SPIRType::Short:
105 return fb::InputDataType::kSignedShort;
106 case spirv_cross::SPIRType::UShort:
107 return fb::InputDataType::kUnsignedShort;
108 case spirv_cross::SPIRType::Int:
109 return fb::InputDataType::kSignedInt;
110 case spirv_cross::SPIRType::UInt:
111 return fb::InputDataType::kUnsignedInt;
112 case spirv_cross::SPIRType::Int64:
113 return fb::InputDataType::kSignedInt64;
114 case spirv_cross::SPIRType::UInt64:
115 return fb::InputDataType::kUnsignedInt64;
116 case spirv_cross::SPIRType::Float:
117 return fb::InputDataType::kFloat;
118 case spirv_cross::SPIRType::Double:
119 return fb::InputDataType::kDouble;
120 case spirv_cross::SPIRType::Unknown:
121 case spirv_cross::SPIRType::Void:
122 case spirv_cross::SPIRType::Half:
123 case spirv_cross::SPIRType::AtomicCounter:
124 case spirv_cross::SPIRType::Struct:
125 case spirv_cross::SPIRType::Image:
126 case spirv_cross::SPIRType::SampledImage:
127 case spirv_cross::SPIRType::Sampler:
128 case spirv_cross::SPIRType::AccelerationStructure:
129 case spirv_cross::SPIRType::RayQuery:
130 case spirv_cross::SPIRType::ControlPointArray:
131 case spirv_cross::SPIRType::Interpolant:
132 case spirv_cross::SPIRType::Char:
133 return std::nullopt;
134 }
135 FML_UNREACHABLE();
136 }
impeller::kFloat
@ kFloat
Definition: runtime_types.h:25

References impeller::kFloat, and type.

Referenced by impeller::compiler::ShaderBundleData::CreateFlatbuffer(), and impeller::compiler::RuntimeStageData::CreateStageFlatbuffer().

## ◆ ToInputType() [2/2]

static std::optional<fb::shaderbundle::InputDataType> impeller::compiler::ToInputType | ( | spirv_cross::SPIRType::BaseType | type | ) |
| static

Definition at line 100 of file shader_bundle_data.cc.

101 {
102 switch (type) {
103 case spirv_cross::SPIRType::Boolean:
104 return fb::shaderbundle::InputDataType::kBoolean;
105 case spirv_cross::SPIRType::SByte:
106 return fb::shaderbundle::InputDataType::kSignedByte;
107 case spirv_cross::SPIRType::UByte:
108 return fb::shaderbundle::InputDataType::kUnsignedByte;
109 case spirv_cross::SPIRType::Short:
110 return fb::shaderbundle::InputDataType::kSignedShort;
111 case spirv_cross::SPIRType::UShort:
112 return fb::shaderbundle::InputDataType::kUnsignedShort;
113 case spirv_cross::SPIRType::Int:
114 return fb::shaderbundle::InputDataType::kSignedInt;
115 case spirv_cross::SPIRType::UInt:
116 return fb::shaderbundle::InputDataType::kUnsignedInt;
117 case spirv_cross::SPIRType::Int64:
118 return fb::shaderbundle::InputDataType::kSignedInt64;
119 case spirv_cross::SPIRType::UInt64:
120 return fb::shaderbundle::InputDataType::kUnsignedInt64;
121 case spirv_cross::SPIRType::Float:
122 return fb::shaderbundle::InputDataType::kFloat;
123 case spirv_cross::SPIRType::Double:
124 return fb::shaderbundle::InputDataType::kDouble;
125 case spirv_cross::SPIRType::Unknown:
126 case spirv_cross::SPIRType::Void:
127 case spirv_cross::SPIRType::Half:
128 case spirv_cross::SPIRType::AtomicCounter:
129 case spirv_cross::SPIRType::Struct:
130 case spirv_cross::SPIRType::Image:
131 case spirv_cross::SPIRType::SampledImage:
132 case spirv_cross::SPIRType::Sampler:
133 case spirv_cross::SPIRType::AccelerationStructure:
134 case spirv_cross::SPIRType::RayQuery:
135 case spirv_cross::SPIRType::ControlPointArray:
136 case spirv_cross::SPIRType::Interpolant:
137 case spirv_cross::SPIRType::Char:
138 return std::nullopt;
139 }
140 FML_UNREACHABLE();
141 }

References impeller::kFloat, and type.

## ◆ ToJsonStage()

static std::optional<fb::Stage> impeller::compiler::ToJsonStage | ( | spv::ExecutionModel | stage | ) |
| static

Definition at line 47 of file runtime_stage_data.cc.

47 {
48 switch (stage) {
49 case spv::ExecutionModel::ExecutionModelVertex:
50 return fb::Stage::kVertex;
51 case spv::ExecutionModel::ExecutionModelFragment:
52 return fb::Stage::kFragment;
53 case spv::ExecutionModel::ExecutionModelGLCompute:
54 return fb::Stage::kCompute;
55 default:
56 return std::nullopt;
57 }
58 FML_UNREACHABLE();
59 }

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ ToJsonType()

static std::optional<uint32_t> impeller::compiler::ToJsonType | ( | spirv_cross::SPIRType::BaseType | type | ) |
| static

Definition at line 138 of file runtime_stage_data.cc.

139 {
140 switch (type) {
141 case spirv_cross::SPIRType::Boolean:
142 return 0; // fb::UniformDataType::kBoolean;
143 case spirv_cross::SPIRType::SByte:
144 return 1; // fb::UniformDataType::kSignedByte;
145 case spirv_cross::SPIRType::UByte:
146 return 2; // fb::UniformDataType::kUnsignedByte;
147 case spirv_cross::SPIRType::Short:
148 return 3; // fb::UniformDataType::kSignedShort;
149 case spirv_cross::SPIRType::UShort:
150 return 4; // fb::UniformDataType::kUnsignedShort;
151 case spirv_cross::SPIRType::Int:
152 return 5; // fb::UniformDataType::kSignedInt;
153 case spirv_cross::SPIRType::UInt:
154 return 6; // fb::UniformDataType::kUnsignedInt;
155 case spirv_cross::SPIRType::Int64:
156 return 7; // fb::UniformDataType::kSignedInt64;
157 case spirv_cross::SPIRType::UInt64:
158 return 8; // fb::UniformDataType::kUnsignedInt64;
159 case spirv_cross::SPIRType::Half:
160 return 9; // b::UniformDataType::kHalfFloat;
161 case spirv_cross::SPIRType::Float:
162 return 10; // fb::UniformDataType::kFloat;
163 case spirv_cross::SPIRType::Double:
164 return 11; // fb::UniformDataType::kDouble;
165 case spirv_cross::SPIRType::SampledImage:
166 return 12; // fb::UniformDataType::kSampledImage;
167 case spirv_cross::SPIRType::Struct:
168 return 13;
169 case spirv_cross::SPIRType::AccelerationStructure:
170 case spirv_cross::SPIRType::AtomicCounter:
171 case spirv_cross::SPIRType::Char:
172 case spirv_cross::SPIRType::ControlPointArray:
173 case spirv_cross::SPIRType::Image:
174 case spirv_cross::SPIRType::Interpolant:
175 case spirv_cross::SPIRType::RayQuery:
176 case spirv_cross::SPIRType::Sampler:
177 case spirv_cross::SPIRType::Unknown:
178 case spirv_cross::SPIRType::Void:
179 return std::nullopt;
180 }
181 FML_UNREACHABLE();
182 }

References type.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ ToLowerCase()

std::string impeller::compiler::ToLowerCase | ( | std::string_view | string | ) |

Definition at line 62 of file utilities.cc.

62 {
63 std::string result = std::string(string);
64 std::transform(result.begin(), result.end(), result.begin(),
65 [](char x) { return std::tolower(x); });
66 return result;
67 }
x
int32_t x
Definition: dl_golden_unittests.cc:458
transform
Matrix transform
Definition: gaussian_blur_filter_contents.cc:214

References transform, and x.

Referenced by SourceTypeFromString(), and impeller::compiler::Switches::Switches().

## ◆ ToShaderCShaderKind()

shaderc_shader_kind impeller::compiler::ToShaderCShaderKind | ( | SourceType | type | ) |

Definition at line 187 of file types.cc.

187 {
188 switch (type) {
189 case SourceType::kVertexShader:
190 return shaderc_shader_kind::shaderc_vertex_shader;
191 case SourceType::kFragmentShader:
192 return shaderc_shader_kind::shaderc_fragment_shader;
193 case SourceType::kComputeShader:
194 return shaderc_shader_kind::shaderc_compute_shader;
195 case SourceType::kUnknown:
196 break;
197 }
198 return shaderc_shader_kind::shaderc_glsl_infer_from_source;
199 }

References kComputeShader, kFragmentShader, kUnknown, kVertexShader, and type.

Referenced by impeller::compiler::SPIRVCompiler::CompileToSPV().

## ◆ ToSourceLanguage()

SourceLanguage impeller::compiler::ToSourceLanguage | ( | const std::string & | source_language | ) |

Definition at line 64 of file types.cc.

64 {
65 if (source_language == "glsl") {
66 return SourceLanguage::kGLSL;
67 }
68 if (source_language == "hlsl") {
69 return SourceLanguage::kHLSL;
70 }
71 return SourceLanguage::kUnknown;
72 }

References kGLSL, kHLSL, and kUnknown.

Referenced by ParseShaderBundleConfig(), and impeller::compiler::Switches::Switches().

## ◆ ToStage() [1/2]

static std::optional<fb::Stage> impeller::compiler::ToStage | ( | spv::ExecutionModel | stage | ) |
| static

Definition at line 33 of file runtime_stage_data.cc.

33 {
34 switch (stage) {
35 case spv::ExecutionModel::ExecutionModelVertex:
36 return fb::Stage::kVertex;
37 case spv::ExecutionModel::ExecutionModelFragment:
38 return fb::Stage::kFragment;
39 case spv::ExecutionModel::ExecutionModelGLCompute:
40 return fb::Stage::kCompute;
41 default:
42 return std::nullopt;
43 }
44 FML_UNREACHABLE();
45 }

Referenced by impeller::compiler::ShaderBundleData::CreateFlatbuffer(), and impeller::compiler::RuntimeStageData::CreateStageFlatbuffer().

## ◆ ToStage() [2/2]

static std::optional<fb::shaderbundle::ShaderStage> impeller::compiler::ToStage | ( | spv::ExecutionModel | stage | ) |
| static

Definition at line 41 of file shader_bundle_data.cc.

42 {
43 switch (stage) {
44 case spv::ExecutionModel::ExecutionModelVertex:
45 return fb::shaderbundle::ShaderStage::kVertex;
46 case spv::ExecutionModel::ExecutionModelFragment:
47 return fb::shaderbundle::ShaderStage::kFragment;
48 case spv::ExecutionModel::ExecutionModelGLCompute:
49 return fb::shaderbundle::ShaderStage::kCompute;
50 default:
51 return std::nullopt;
52 }
53 FML_UNREACHABLE();
54 }

## ◆ ToString()

static std::string impeller::compiler::ToString | ( | CompilerBackend::Type | type | ) |
| static

Definition at line 575 of file reflector.cc.

575 {
576 switch (type) {
577 case CompilerBackend::Type::kMSL:
578 return "Metal Shading Language";
579 case CompilerBackend::Type::kGLSL:
580 return "OpenGL Shading Language";
581 case CompilerBackend::Type::kGLSLVulkan:
582 return "OpenGL Shading Language (Relaxed Vulkan Semantics)";
583 case CompilerBackend::Type::kSkSL:
584 return "SkSL Shading Language";
585 }
586 FML_UNREACHABLE();
587 }

References impeller::compiler::CompilerBackend::kGLSL, impeller::compiler::CompilerBackend::kGLSLVulkan, impeller::compiler::CompilerBackend::kMSL, impeller::compiler::CompilerBackend::kSkSL, and type.

## ◆ ToUniformType() [1/2]

static std::optional<fb::UniformDataType> impeller::compiler::ToUniformType | ( | spirv_cross::SPIRType::BaseType | type | ) |
| static

Definition at line 61 of file runtime_stage_data.cc.

62 {
63 switch (type) {
64 case spirv_cross::SPIRType::Float:
65 return fb::UniformDataType::kFloat;
66 case spirv_cross::SPIRType::SampledImage:
67 return fb::UniformDataType::kSampledImage;
68 case spirv_cross::SPIRType::Struct:
69 return fb::UniformDataType::kStruct;
70 case spirv_cross::SPIRType::Boolean:
71 case spirv_cross::SPIRType::SByte:
72 case spirv_cross::SPIRType::UByte:
73 case spirv_cross::SPIRType::Short:
74 case spirv_cross::SPIRType::UShort:
75 case spirv_cross::SPIRType::Int:
76 case spirv_cross::SPIRType::UInt:
77 case spirv_cross::SPIRType::Int64:
78 case spirv_cross::SPIRType::UInt64:
79 case spirv_cross::SPIRType::Half:
80 case spirv_cross::SPIRType::Double:
81 case spirv_cross::SPIRType::AccelerationStructure:
82 case spirv_cross::SPIRType::AtomicCounter:
83 case spirv_cross::SPIRType::Char:
84 case spirv_cross::SPIRType::ControlPointArray:
85 case spirv_cross::SPIRType::Image:
86 case spirv_cross::SPIRType::Interpolant:
87 case spirv_cross::SPIRType::RayQuery:
88 case spirv_cross::SPIRType::Sampler:
89 case spirv_cross::SPIRType::Unknown:
90 case spirv_cross::SPIRType::Void:
91 return std::nullopt;
92 }
93 FML_UNREACHABLE();
94 }
impeller::kSampledImage
@ kSampledImage
Definition: runtime_types.h:26
impeller::kStruct
@ kStruct
Definition: runtime_types.h:27

References impeller::kFloat, impeller::kSampledImage, impeller::kStruct, and type.

Referenced by impeller::compiler::ShaderBundleData::CreateFlatbuffer(), and impeller::compiler::RuntimeStageData::CreateStageFlatbuffer().

## ◆ ToUniformType() [2/2]

static std::optional<fb::shaderbundle::UniformDataType> impeller::compiler::ToUniformType | ( | spirv_cross::SPIRType::BaseType | type | ) |
| static

Definition at line 56 of file shader_bundle_data.cc.

57 {
58 switch (type) {
59 case spirv_cross::SPIRType::Boolean:
60 return fb::shaderbundle::UniformDataType::kBoolean;
61 case spirv_cross::SPIRType::SByte:
62 return fb::shaderbundle::UniformDataType::kSignedByte;
63 case spirv_cross::SPIRType::UByte:
64 return fb::shaderbundle::UniformDataType::kUnsignedByte;
65 case spirv_cross::SPIRType::Short:
66 return fb::shaderbundle::UniformDataType::kSignedShort;
67 case spirv_cross::SPIRType::UShort:
68 return fb::shaderbundle::UniformDataType::kUnsignedShort;
69 case spirv_cross::SPIRType::Int:
70 return fb::shaderbundle::UniformDataType::kSignedInt;
71 case spirv_cross::SPIRType::UInt:
72 return fb::shaderbundle::UniformDataType::kUnsignedInt;
73 case spirv_cross::SPIRType::Int64:
74 return fb::shaderbundle::UniformDataType::kSignedInt64;
75 case spirv_cross::SPIRType::UInt64:
76 return fb::shaderbundle::UniformDataType::kUnsignedInt64;
77 case spirv_cross::SPIRType::Half:
78 return fb::shaderbundle::UniformDataType::kHalfFloat;
79 case spirv_cross::SPIRType::Float:
80 return fb::shaderbundle::UniformDataType::kFloat;
81 case spirv_cross::SPIRType::Double:
82 return fb::shaderbundle::UniformDataType::kDouble;
83 case spirv_cross::SPIRType::SampledImage:
84 return fb::shaderbundle::UniformDataType::kSampledImage;
85 case spirv_cross::SPIRType::AccelerationStructure:
86 case spirv_cross::SPIRType::AtomicCounter:
87 case spirv_cross::SPIRType::Char:
88 case spirv_cross::SPIRType::ControlPointArray:
89 case spirv_cross::SPIRType::Image:
90 case spirv_cross::SPIRType::Interpolant:
91 case spirv_cross::SPIRType::RayQuery:
92 case spirv_cross::SPIRType::Sampler:
93 case spirv_cross::SPIRType::Struct:
94 case spirv_cross::SPIRType::Unknown:
95 case spirv_cross::SPIRType::Void:
96 return std::nullopt;
97 }
98 FML_UNREACHABLE();
99 }

References impeller::kFloat, impeller::kSampledImage, and type.

## ◆ TypeNameWithPaddingOfSize()

static std::string impeller::compiler::TypeNameWithPaddingOfSize | ( | size_t | size | ) |
| static

Definition at line 743 of file reflector.cc.

743 {
744 std::stringstream stream;
745 stream << "Padding<" << size << ">";
746 return stream.str();
747 }

Referenced by VertexTypeFromInputResource().

## ◆ Utf8FromPath()

std::string impeller::compiler::Utf8FromPath | ( | const std::filesystem::path & | path | ) |

Converts a native format path to a utf8 string.

        This utility uses `path::u8string()` to convert native paths to
        utf8. If the given path doesn't match the underlying native path
        format, and the native path format isn't utf8 (i.e. Windows, which
        has utf16 paths), the path will get mangled.

Definition at line 30 of file utilities.cc.

30 {
31 return reinterpret_cast<const char*>(path.u8string().c_str());
32 }

Referenced by impeller::compiler::Switches::AreValid(), CreateReflectorOptions(), EntryPointFunctionNameFromSourceName(), GenerateShaderBundle(), InferShaderNameFromPath(), Main(), OutputDepfile(), OutputIPLR(), OutputReflectionData(), OutputSLFile(), and impeller::compiler::Switches::Switches().

## ◆ VertexTypeFromInputResource()

static VertexType impeller::compiler::VertexTypeFromInputResource | ( | const spirv_cross::Compiler & | compiler,
|  | const spirv_cross::Resource * | resource
| ) |  |
| static

Definition at line 1202 of file reflector.cc.

1204 {
1205 VertexType result;
1206 result.variable_name = resource->name;
1207 const auto& type = compiler.get_type(resource->type_id);
1208 result.base_type = type.basetype;
1209 const auto total_size = type.columns * type.vecsize * type.width / 8u;
1210 result.byte_length = total_size;
1211
1212 if (type.basetype == spirv_cross::SPIRType::BaseType::Float &&
1213 type.columns == 1u && type.vecsize == 2u &&
1214 type.width == sizeof(float) * 8u) {
1215 result.type_name = "Point";
1216 } else if (type.basetype == spirv_cross::SPIRType::BaseType::Float &&
1217 type.columns == 1u && type.vecsize == 4u &&
1218 type.width == sizeof(float) * 8u) {
1219 result.type_name = "Vector4";
1220 } else if (type.basetype == spirv_cross::SPIRType::BaseType::Float &&
1221 type.columns == 1u && type.vecsize == 3u &&
1222 type.width == sizeof(float) * 8u) {
1223 result.type_name = "Vector3";
1224 } else if (type.basetype == spirv_cross::SPIRType::BaseType::Float &&
1225 type.columns == 1u && type.vecsize == 1u &&
1226 type.width == sizeof(float) * 8u) {
1227 result.type_name = "Scalar";
1228 } else if (type.basetype == spirv_cross::SPIRType::BaseType::Int &&
1229 type.columns == 1u && type.vecsize == 1u &&
1230 type.width == sizeof(int32_t) * 8u) {
1231 result.type_name = "int32_t";
1232 } else {
1233 // Catch all unknown padding.
1234 result.type_name = TypeNameWithPaddingOfSize(total_size);
1235 }
1236
1237 return result;
1238 }
impeller::compiler::TypeNameWithPaddingOfSize
static std::string TypeNameWithPaddingOfSize(size_t size)
Definition: reflector.cc:743

References impeller::compiler::VertexType::base_type, impeller::compiler::VertexType::byte_length, type, impeller::compiler::VertexType::type_name, TypeNameWithPaddingOfSize(), and impeller::compiler::VertexType::variable_name.

## Variable Documentation

## ◆ kEntrypointKey

const char* impeller::compiler::kEntrypointKey = "entrypoint"
| static

Definition at line 186 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kExternalTexturePrefix

constexpr char impeller::compiler::kExternalTexturePrefix[] = "SAMPLER_EXTERNAL_OES_"
| constexpr

Definition at line 11 of file constants.h.

Referenced by CreateGLSLCompiler().

## ◆ kKnownPlatforms

const std::map<std::string, TargetPlatform> impeller::compiler::kKnownPlatforms
| static

Initial value:
= {
{"metal-desktop", TargetPlatform::kMetalDesktop},
{"metal-ios", TargetPlatform::kMetalIOS},
{"vulkan", TargetPlatform::kVulkan},
{"opengl-es", TargetPlatform::kOpenGLES},
{"opengl-desktop", TargetPlatform::kOpenGLDesktop},
}

Definition at line 20 of file switches.cc.

Referenced by impeller::compiler::Switches::PrintHelp(), and TargetPlatformFromCommandLine().

## ◆ kKnownRuntimeStages

const std::map<std::string, TargetPlatform> impeller::compiler::kKnownRuntimeStages
| static

Initial value:
= {
{"sksl", TargetPlatform::kSkSL},
{"runtime-stage-metal", TargetPlatform::kRuntimeStageMetal},
{"runtime-stage-gles", TargetPlatform::kRuntimeStageGLES},
{"runtime-stage-gles3", TargetPlatform::kRuntimeStageGLES3},
{"runtime-stage-vulkan", TargetPlatform::kRuntimeStageVulkan},
}

Definition at line 28 of file switches.cc.

Referenced by impeller::compiler::Switches::PrintHelp(), and RuntimeStagesFromCommandLine().

## ◆ kKnownSourceTypes

const std::map<std::string, SourceType> impeller::compiler::kKnownSourceTypes
| static

Initial value:
= {
{"vert", SourceType::kVertexShader},
{"frag", SourceType::kFragmentShader},
{"comp", SourceType::kComputeShader},
}

Definition at line 36 of file switches.cc.

Referenced by impeller::compiler::Switches::PrintHelp(), and SourceTypeFromCommandLine().

## ◆ kMaxUniformBufferSize

const uint32_t impeller::compiler::kMaxUniformBufferSize = 6208
| static

Definition at line 38 of file compiler.cc.

Referenced by impeller::compiler::Compiler::Compiler().

## ◆ kReflectionCCTemplate

constexpr std::string_view impeller::compiler::kReflectionCCTemplate
| constexpr

Definition at line 202 of file code_gen_template.h.

## ◆ kReflectionHeaderTemplate

constexpr std::string_view impeller::compiler::kReflectionHeaderTemplate
| constexpr

Definition at line 10 of file code_gen_template.h.

## ◆ kShaderKey

const char* impeller::compiler::kShaderKey = "shader"
| static

Definition at line 188 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kStageKey

const char* impeller::compiler::kStageKey = "stage"
| static

Definition at line 184 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kTargetPlatformKey

const char* impeller::compiler::kTargetPlatformKey = "target_platform"
| static

Definition at line 185 of file runtime_stage_data.cc.

## ◆ kUniformArrayElementsKey

const char* impeller::compiler::kUniformArrayElementsKey = "array_elements"
| static

Definition at line 195 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformBitWidthKey

const char* impeller::compiler::kUniformBitWidthKey = "bit_width"
| static

Definition at line 194 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformColumnsKey

const char* impeller::compiler::kUniformColumnsKey = "columns"
| static

Definition at line 193 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformLocationKey

const char* impeller::compiler::kUniformLocationKey = "location"
| static

Definition at line 190 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformNameKey

const char* impeller::compiler::kUniformNameKey = "name"
| static

Definition at line 189 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformRowsKey

const char* impeller::compiler::kUniformRowsKey = "rows"
| static

Definition at line 192 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformsKey

const char* impeller::compiler::kUniformsKey = "uniforms"
| static

Definition at line 187 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().

## ◆ kUniformTypeKey

const char* impeller::compiler::kUniformTypeKey = "type"
| static

Definition at line 191 of file runtime_stage_data.cc.

Referenced by impeller::compiler::RuntimeStageData::CreateJsonMapping().