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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/inspector/inspector.h"
#include <limits>
#include <utility>
#include "src/tint/ast/bool_literal_expression.h"
#include "src/tint/ast/call_expression.h"
#include "src/tint/ast/float_literal_expression.h"
#include "src/tint/ast/id_attribute.h"
#include "src/tint/ast/identifier.h"
#include "src/tint/ast/int_literal_expression.h"
#include "src/tint/ast/interpolate_attribute.h"
#include "src/tint/ast/location_attribute.h"
#include "src/tint/ast/module.h"
#include "src/tint/ast/override.h"
#include "src/tint/ast/var.h"
#include "src/tint/builtin/builtin_value.h"
#include "src/tint/builtin/extension.h"
#include "src/tint/builtin/interpolation_sampling.h"
#include "src/tint/builtin/interpolation_type.h"
#include "src/tint/sem/builtin_enum_expression.h"
#include "src/tint/sem/call.h"
#include "src/tint/sem/function.h"
#include "src/tint/sem/module.h"
#include "src/tint/sem/statement.h"
#include "src/tint/sem/struct.h"
#include "src/tint/sem/variable.h"
#include "src/tint/switch.h"
#include "src/tint/type/array.h"
#include "src/tint/type/bool.h"
#include "src/tint/type/depth_multisampled_texture.h"
#include "src/tint/type/depth_texture.h"
#include "src/tint/type/external_texture.h"
#include "src/tint/type/f16.h"
#include "src/tint/type/f32.h"
#include "src/tint/type/i32.h"
#include "src/tint/type/matrix.h"
#include "src/tint/type/multisampled_texture.h"
#include "src/tint/type/sampled_texture.h"
#include "src/tint/type/storage_texture.h"
#include "src/tint/type/u32.h"
#include "src/tint/type/vector.h"
#include "src/tint/type/void.h"
#include "src/tint/utils/math.h"
#include "src/tint/utils/string.h"
#include "src/tint/utils/unique_vector.h"
namespace tint::inspector {
namespace {
void AppendResourceBindings(std::vector<ResourceBinding>* dest,
const std::vector<ResourceBinding>& orig) {
TINT_ASSERT(Inspector, dest);
if (!dest) {
return;
}
dest->reserve(dest->size() + orig.size());
dest->insert(dest->end(), orig.begin(), orig.end());
}
std::tuple<ComponentType, CompositionType> CalculateComponentAndComposition(
const type::Type* type) {
// entry point in/out variables must of numeric scalar or vector types.
TINT_ASSERT(Inspector, type->is_numeric_scalar_or_vector());
ComponentType componentType = Switch(
type::Type::DeepestElementOf(type), //
[&](const type::F32*) { return ComponentType::kF32; },
[&](const type::F16*) { return ComponentType::kF16; },
[&](const type::I32*) { return ComponentType::kI32; },
[&](const type::U32*) { return ComponentType::kU32; },
[&](Default) {
tint::diag::List diagnostics;
TINT_UNREACHABLE(Inspector, diagnostics) << "unhandled component type";
return ComponentType::kUnknown;
});
CompositionType compositionType;
if (auto* vec = type->As<type::Vector>()) {
switch (vec->Width()) {
case 2: {
compositionType = CompositionType::kVec2;
break;
}
case 3: {
compositionType = CompositionType::kVec3;
break;
}
case 4: {
compositionType = CompositionType::kVec4;
break;
}
default: {
tint::diag::List diagnostics;
TINT_UNREACHABLE(Inspector, diagnostics) << "unhandled composition type";
compositionType = CompositionType::kUnknown;
break;
}
}
} else {
compositionType = CompositionType::kScalar;
}
return {componentType, compositionType};
}
} // namespace
Inspector::Inspector(const Program* program) : program_(program) {}
Inspector::~Inspector() = default;
EntryPoint Inspector::GetEntryPoint(const tint::ast::Function* func) {
EntryPoint entry_point;
TINT_ASSERT(Inspector, func != nullptr);
TINT_ASSERT(Inspector, func->IsEntryPoint());
auto* sem = program_->Sem().Get(func);
entry_point.name = program_->Symbols().NameFor(func->name->symbol);
entry_point.remapped_name = program_->Symbols().NameFor(func->name->symbol);
switch (func->PipelineStage()) {
case ast::PipelineStage::kCompute: {
entry_point.stage = PipelineStage::kCompute;
auto wgsize = sem->WorkgroupSize();
if (wgsize[0].has_value() && wgsize[1].has_value() && wgsize[2].has_value()) {
entry_point.workgroup_size = {wgsize[0].value(), wgsize[1].value(),
wgsize[2].value()};
}
break;
}
case ast::PipelineStage::kFragment: {
entry_point.stage = PipelineStage::kFragment;
break;
}
case ast::PipelineStage::kVertex: {
entry_point.stage = PipelineStage::kVertex;
break;
}
default: {
TINT_UNREACHABLE(Inspector, diagnostics_)
<< "invalid pipeline stage for entry point '" << entry_point.name << "'";
break;
}
}
for (auto* param : sem->Parameters()) {
AddEntryPointInOutVariables(program_->Symbols().NameFor(param->Declaration()->name->symbol),
param->Type(), param->Declaration()->attributes,
param->Location(), entry_point.input_variables);
entry_point.input_position_used |= ContainsBuiltin(
builtin::BuiltinValue::kPosition, param->Type(), param->Declaration()->attributes);
entry_point.front_facing_used |= ContainsBuiltin(
builtin::BuiltinValue::kFrontFacing, param->Type(), param->Declaration()->attributes);
entry_point.sample_index_used |= ContainsBuiltin(
builtin::BuiltinValue::kSampleIndex, param->Type(), param->Declaration()->attributes);
entry_point.input_sample_mask_used |= ContainsBuiltin(
builtin::BuiltinValue::kSampleMask, param->Type(), param->Declaration()->attributes);
entry_point.num_workgroups_used |= ContainsBuiltin(
builtin::BuiltinValue::kNumWorkgroups, param->Type(), param->Declaration()->attributes);
}
if (!sem->ReturnType()->Is<type::Void>()) {
AddEntryPointInOutVariables("<retval>", sem->ReturnType(), func->return_type_attributes,
sem->ReturnLocation(), entry_point.output_variables);
entry_point.output_sample_mask_used = ContainsBuiltin(
builtin::BuiltinValue::kSampleMask, sem->ReturnType(), func->return_type_attributes);
entry_point.frag_depth_used = ContainsBuiltin(
builtin::BuiltinValue::kFragDepth, sem->ReturnType(), func->return_type_attributes);
}
for (auto* var : sem->TransitivelyReferencedGlobals()) {
auto* decl = var->Declaration();
auto name = program_->Symbols().NameFor(decl->name->symbol);
auto* global = var->As<sem::GlobalVariable>();
if (global && global->Declaration()->Is<ast::Override>()) {
Override override;
override.name = name;
override.id = global->OverrideId();
auto* type = var->Type();
TINT_ASSERT(Inspector, type->is_scalar());
if (type->is_bool_scalar_or_vector()) {
override.type = Override::Type::kBool;
} else if (type->is_float_scalar()) {
if (type->Is<type::F16>()) {
override.type = Override::Type::kFloat16;
} else {
override.type = Override::Type::kFloat32;
}
} else if (type->is_signed_integer_scalar()) {
override.type = Override::Type::kInt32;
} else if (type->is_unsigned_integer_scalar()) {
override.type = Override::Type::kUint32;
} else {
TINT_UNREACHABLE(Inspector, diagnostics_);
}
override.is_initialized = global->Declaration()->initializer;
override.is_id_specified =
ast::HasAttribute<ast::IdAttribute>(global->Declaration()->attributes);
entry_point.overrides.push_back(override);
}
}
return entry_point;
}
EntryPoint Inspector::GetEntryPoint(const std::string& entry_point_name) {
auto* func = FindEntryPointByName(entry_point_name);
if (!func) {
return EntryPoint();
}
return GetEntryPoint(func);
}
std::vector<EntryPoint> Inspector::GetEntryPoints() {
std::vector<EntryPoint> result;
for (auto* func : program_->AST().Functions()) {
if (!func->IsEntryPoint()) {
continue;
}
result.push_back(GetEntryPoint(func));
}
return result;
}
std::map<OverrideId, Scalar> Inspector::GetOverrideDefaultValues() {
std::map<OverrideId, Scalar> result;
for (auto* var : program_->AST().GlobalVariables()) {
auto* global = program_->Sem().Get<sem::GlobalVariable>(var);
if (!global || !global->Declaration()->Is<ast::Override>()) {
continue;
}
// If there are conflicting defintions for an override id, that is invalid
// WGSL, so the resolver should catch it. Thus here the inspector just
// assumes all definitions of the override id are the same, so only needs
// to find the first reference to override id.
OverrideId override_id = global->OverrideId();
if (result.find(override_id) != result.end()) {
continue;
}
if (global->Initializer()) {
if (auto* value = global->Initializer()->ConstantValue()) {
result[override_id] = Switch(
value->Type(), //
[&](const type::I32*) { return Scalar(value->ValueAs<i32>()); },
[&](const type::U32*) { return Scalar(value->ValueAs<u32>()); },
[&](const type::F32*) { return Scalar(value->ValueAs<f32>()); },
[&](const type::F16*) {
// Default value of f16 override is also stored as float scalar.
return Scalar(static_cast<float>(value->ValueAs<f16>()));
},
[&](const type::Bool*) { return Scalar(value->ValueAs<bool>()); });
continue;
}
}
// No const-expression initializer for the override
result[override_id] = Scalar();
}
return result;
}
std::map<std::string, OverrideId> Inspector::GetNamedOverrideIds() {
std::map<std::string, OverrideId> result;
for (auto* var : program_->AST().GlobalVariables()) {
auto* global = program_->Sem().Get<sem::GlobalVariable>(var);
if (global && global->Declaration()->Is<ast::Override>()) {
auto name = program_->Symbols().NameFor(var->name->symbol);
result[name] = global->OverrideId();
}
}
return result;
}
uint32_t Inspector::GetStorageSize(const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return 0;
}
size_t size = 0;
auto* func_sem = program_->Sem().Get(func);
for (auto& ruv : func_sem->TransitivelyReferencedUniformVariables()) {
size += ruv.first->Type()->UnwrapRef()->Size();
}
for (auto& rsv : func_sem->TransitivelyReferencedStorageBufferVariables()) {
size += rsv.first->Type()->UnwrapRef()->Size();
}
if (static_cast<uint64_t>(size) > static_cast<uint64_t>(std::numeric_limits<uint32_t>::max())) {
return std::numeric_limits<uint32_t>::max();
}
return static_cast<uint32_t>(size);
}
std::vector<ResourceBinding> Inspector::GetResourceBindings(const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
std::vector<ResourceBinding> result;
for (auto fn : {
&Inspector::GetUniformBufferResourceBindings,
&Inspector::GetStorageBufferResourceBindings,
&Inspector::GetReadOnlyStorageBufferResourceBindings,
&Inspector::GetSamplerResourceBindings,
&Inspector::GetComparisonSamplerResourceBindings,
&Inspector::GetSampledTextureResourceBindings,
&Inspector::GetMultisampledTextureResourceBindings,
&Inspector::GetWriteOnlyStorageTextureResourceBindings,
&Inspector::GetDepthTextureResourceBindings,
&Inspector::GetDepthMultisampledTextureResourceBindings,
&Inspector::GetExternalTextureResourceBindings,
}) {
AppendResourceBindings(&result, (this->*fn)(entry_point));
}
return result;
}
std::vector<ResourceBinding> Inspector::GetUniformBufferResourceBindings(
const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
std::vector<ResourceBinding> result;
auto* func_sem = program_->Sem().Get(func);
for (auto& ruv : func_sem->TransitivelyReferencedUniformVariables()) {
auto* var = ruv.first;
auto binding_info = ruv.second;
auto* unwrapped_type = var->Type()->UnwrapRef();
ResourceBinding entry;
entry.resource_type = ResourceBinding::ResourceType::kUniformBuffer;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
entry.size = unwrapped_type->Size();
entry.size_no_padding = entry.size;
if (auto* str = unwrapped_type->As<sem::Struct>()) {
entry.size_no_padding = str->SizeNoPadding();
} else {
entry.size_no_padding = entry.size;
}
result.push_back(entry);
}
return result;
}
std::vector<ResourceBinding> Inspector::GetStorageBufferResourceBindings(
const std::string& entry_point) {
return GetStorageBufferResourceBindingsImpl(entry_point, false);
}
std::vector<ResourceBinding> Inspector::GetReadOnlyStorageBufferResourceBindings(
const std::string& entry_point) {
return GetStorageBufferResourceBindingsImpl(entry_point, true);
}
std::vector<ResourceBinding> Inspector::GetSamplerResourceBindings(const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
std::vector<ResourceBinding> result;
auto* func_sem = program_->Sem().Get(func);
for (auto& rs : func_sem->TransitivelyReferencedSamplerVariables()) {
auto binding_info = rs.second;
ResourceBinding entry;
entry.resource_type = ResourceBinding::ResourceType::kSampler;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
result.push_back(entry);
}
return result;
}
std::vector<ResourceBinding> Inspector::GetComparisonSamplerResourceBindings(
const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
std::vector<ResourceBinding> result;
auto* func_sem = program_->Sem().Get(func);
for (auto& rcs : func_sem->TransitivelyReferencedComparisonSamplerVariables()) {
auto binding_info = rcs.second;
ResourceBinding entry;
entry.resource_type = ResourceBinding::ResourceType::kComparisonSampler;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
result.push_back(entry);
}
return result;
}
std::vector<ResourceBinding> Inspector::GetSampledTextureResourceBindings(
const std::string& entry_point) {
return GetSampledTextureResourceBindingsImpl(entry_point, false);
}
std::vector<ResourceBinding> Inspector::GetMultisampledTextureResourceBindings(
const std::string& entry_point) {
return GetSampledTextureResourceBindingsImpl(entry_point, true);
}
std::vector<ResourceBinding> Inspector::GetWriteOnlyStorageTextureResourceBindings(
const std::string& entry_point) {
return GetStorageTextureResourceBindingsImpl(entry_point);
}
std::vector<ResourceBinding> Inspector::GetTextureResourceBindings(
const std::string& entry_point,
const tint::TypeInfo* texture_type,
ResourceBinding::ResourceType resource_type) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
std::vector<ResourceBinding> result;
auto* func_sem = program_->Sem().Get(func);
for (auto& ref : func_sem->TransitivelyReferencedVariablesOfType(texture_type)) {
auto* var = ref.first;
auto binding_info = ref.second;
ResourceBinding entry;
entry.resource_type = resource_type;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
auto* tex = var->Type()->UnwrapRef()->As<type::Texture>();
entry.dim = TypeTextureDimensionToResourceBindingTextureDimension(tex->dim());
result.push_back(entry);
}
return result;
}
std::vector<ResourceBinding> Inspector::GetDepthTextureResourceBindings(
const std::string& entry_point) {
return GetTextureResourceBindings(entry_point, &TypeInfo::Of<type::DepthTexture>(),
ResourceBinding::ResourceType::kDepthTexture);
}
std::vector<ResourceBinding> Inspector::GetDepthMultisampledTextureResourceBindings(
const std::string& entry_point) {
return GetTextureResourceBindings(entry_point, &TypeInfo::Of<type::DepthMultisampledTexture>(),
ResourceBinding::ResourceType::kDepthMultisampledTexture);
}
std::vector<ResourceBinding> Inspector::GetExternalTextureResourceBindings(
const std::string& entry_point) {
return GetTextureResourceBindings(entry_point, &TypeInfo::Of<type::ExternalTexture>(),
ResourceBinding::ResourceType::kExternalTexture);
}
utils::VectorRef<SamplerTexturePair> Inspector::GetSamplerTextureUses(
const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
GenerateSamplerTargets();
auto it = sampler_targets_->find(entry_point);
if (it == sampler_targets_->end()) {
return {};
}
return it->second;
}
std::vector<SamplerTexturePair> Inspector::GetSamplerTextureUses(
const std::string& entry_point,
const sem::BindingPoint& placeholder) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
auto* func_sem = program_->Sem().Get(func);
std::vector<SamplerTexturePair> new_pairs;
for (auto pair : func_sem->TextureSamplerPairs()) {
auto* texture = pair.first->As<sem::GlobalVariable>();
auto* sampler = pair.second ? pair.second->As<sem::GlobalVariable>() : nullptr;
SamplerTexturePair new_pair;
new_pair.sampler_binding_point = sampler ? sampler->BindingPoint() : placeholder;
new_pair.texture_binding_point = texture->BindingPoint();
new_pairs.push_back(new_pair);
}
return new_pairs;
}
uint32_t Inspector::GetWorkgroupStorageSize(const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return 0;
}
uint32_t total_size = 0;
auto* func_sem = program_->Sem().Get(func);
for (const sem::Variable* var : func_sem->TransitivelyReferencedGlobals()) {
if (var->AddressSpace() == builtin::AddressSpace::kWorkgroup) {
auto* ty = var->Type()->UnwrapRef();
uint32_t align = ty->Align();
uint32_t size = ty->Size();
// This essentially matches std430 layout rules from GLSL, which are in
// turn specified as an upper bound for Vulkan layout sizing. Since D3D
// and Metal are even less specific, we assume Vulkan behavior as a
// good-enough approximation everywhere.
total_size += utils::RoundUp(align, size);
}
}
return total_size;
}
std::vector<std::string> Inspector::GetUsedExtensionNames() {
auto& extensions = program_->Sem().Module()->Extensions();
std::vector<std::string> out;
out.reserve(extensions.Length());
for (auto ext : extensions) {
out.push_back(utils::ToString(ext));
}
return out;
}
std::vector<std::pair<std::string, Source>> Inspector::GetEnableDirectives() {
std::vector<std::pair<std::string, Source>> result;
// Ast nodes for enable directive are stored within global declarations list
auto global_decls = program_->AST().GlobalDeclarations();
for (auto* node : global_decls) {
if (auto* enable = node->As<ast::Enable>()) {
for (auto* ext : enable->extensions) {
result.push_back({utils::ToString(ext->name), ext->source});
}
}
}
return result;
}
const ast::Function* Inspector::FindEntryPointByName(const std::string& name) {
auto* func = program_->AST().Functions().Find(program_->Symbols().Get(name));
if (!func) {
diagnostics_.add_error(diag::System::Inspector, name + " was not found!");
return nullptr;
}
if (!func->IsEntryPoint()) {
diagnostics_.add_error(diag::System::Inspector, name + " is not an entry point!");
return nullptr;
}
return func;
}
void Inspector::AddEntryPointInOutVariables(std::string name,
const type::Type* type,
utils::VectorRef<const ast::Attribute*> attributes,
std::optional<uint32_t> location,
std::vector<StageVariable>& variables) const {
// Skip builtins.
if (ast::HasAttribute<ast::BuiltinAttribute>(attributes)) {
return;
}
auto* unwrapped_type = type->UnwrapRef();
if (auto* struct_ty = unwrapped_type->As<sem::Struct>()) {
// Recurse into members.
for (auto* member : struct_ty->Members()) {
AddEntryPointInOutVariables(name + "." + program_->Symbols().NameFor(member->Name()),
member->Type(), member->Declaration()->attributes,
member->Location(), variables);
}
return;
}
// Base case: add the variable.
StageVariable stage_variable;
stage_variable.name = name;
std::tie(stage_variable.component_type, stage_variable.composition_type) =
CalculateComponentAndComposition(type);
TINT_ASSERT(Inspector, location.has_value());
stage_variable.has_location_attribute = true;
stage_variable.location_attribute = location.value();
std::tie(stage_variable.interpolation_type, stage_variable.interpolation_sampling) =
CalculateInterpolationData(type, attributes);
variables.push_back(stage_variable);
}
bool Inspector::ContainsBuiltin(builtin::BuiltinValue builtin,
const type::Type* type,
utils::VectorRef<const ast::Attribute*> attributes) const {
auto* unwrapped_type = type->UnwrapRef();
if (auto* struct_ty = unwrapped_type->As<sem::Struct>()) {
// Recurse into members.
for (auto* member : struct_ty->Members()) {
if (ContainsBuiltin(builtin, member->Type(), member->Declaration()->attributes)) {
return true;
}
}
return false;
}
// Base case: check for builtin
auto* builtin_declaration = ast::GetAttribute<ast::BuiltinAttribute>(attributes);
if (!builtin_declaration) {
return false;
}
return program_->Sem().Get(builtin_declaration)->Value() == builtin;
}
std::vector<ResourceBinding> Inspector::GetStorageBufferResourceBindingsImpl(
const std::string& entry_point,
bool read_only) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
auto* func_sem = program_->Sem().Get(func);
std::vector<ResourceBinding> result;
for (auto& rsv : func_sem->TransitivelyReferencedStorageBufferVariables()) {
auto* var = rsv.first;
auto binding_info = rsv.second;
if (read_only != (var->Access() == builtin::Access::kRead)) {
continue;
}
auto* unwrapped_type = var->Type()->UnwrapRef();
ResourceBinding entry;
entry.resource_type = read_only ? ResourceBinding::ResourceType::kReadOnlyStorageBuffer
: ResourceBinding::ResourceType::kStorageBuffer;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
entry.size = unwrapped_type->Size();
if (auto* str = unwrapped_type->As<sem::Struct>()) {
entry.size_no_padding = str->SizeNoPadding();
} else {
entry.size_no_padding = entry.size;
}
result.push_back(entry);
}
return result;
}
std::vector<ResourceBinding> Inspector::GetSampledTextureResourceBindingsImpl(
const std::string& entry_point,
bool multisampled_only) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
std::vector<ResourceBinding> result;
auto* func_sem = program_->Sem().Get(func);
auto referenced_variables = multisampled_only
? func_sem->TransitivelyReferencedMultisampledTextureVariables()
: func_sem->TransitivelyReferencedSampledTextureVariables();
for (auto& ref : referenced_variables) {
auto* var = ref.first;
auto binding_info = ref.second;
ResourceBinding entry;
entry.resource_type = multisampled_only
? ResourceBinding::ResourceType::kMultisampledTexture
: ResourceBinding::ResourceType::kSampledTexture;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
auto* texture_type = var->Type()->UnwrapRef()->As<type::Texture>();
entry.dim = TypeTextureDimensionToResourceBindingTextureDimension(texture_type->dim());
const type::Type* base_type = nullptr;
if (multisampled_only) {
base_type = texture_type->As<type::MultisampledTexture>()->type();
} else {
base_type = texture_type->As<type::SampledTexture>()->type();
}
entry.sampled_kind = BaseTypeToSampledKind(base_type);
result.push_back(entry);
}
return result;
}
std::vector<ResourceBinding> Inspector::GetStorageTextureResourceBindingsImpl(
const std::string& entry_point) {
auto* func = FindEntryPointByName(entry_point);
if (!func) {
return {};
}
auto* func_sem = program_->Sem().Get(func);
std::vector<ResourceBinding> result;
for (auto& ref : func_sem->TransitivelyReferencedVariablesOfType<type::StorageTexture>()) {
auto* var = ref.first;
auto binding_info = ref.second;
auto* texture_type = var->Type()->UnwrapRef()->As<type::StorageTexture>();
ResourceBinding entry;
entry.resource_type = ResourceBinding::ResourceType::kWriteOnlyStorageTexture;
entry.bind_group = binding_info.group;
entry.binding = binding_info.binding;
entry.dim = TypeTextureDimensionToResourceBindingTextureDimension(texture_type->dim());
auto* base_type = texture_type->type();
entry.sampled_kind = BaseTypeToSampledKind(base_type);
entry.image_format =
TypeTexelFormatToResourceBindingTexelFormat(texture_type->texel_format());
result.push_back(entry);
}
return result;
}
void Inspector::GenerateSamplerTargets() {
// Do not re-generate, since |program_| should not change during the lifetime
// of the inspector.
if (sampler_targets_ != nullptr) {
return;
}
sampler_targets_ = std::make_unique<
std::unordered_map<std::string, utils::UniqueVector<SamplerTexturePair, 4>>>();
auto& sem = program_->Sem();
for (auto* node : program_->ASTNodes().Objects()) {
auto* c = node->As<ast::CallExpression>();
if (!c) {
continue;
}
auto* call = sem.Get(c)->UnwrapMaterialize()->As<sem::Call>();
if (!call) {
continue;
}
auto* i = call->Target()->As<sem::Builtin>();
if (!i) {
continue;
}
const auto& signature = i->Signature();
int sampler_index = signature.IndexOf(sem::ParameterUsage::kSampler);
if (sampler_index == -1) {
continue;
}
int texture_index = signature.IndexOf(sem::ParameterUsage::kTexture);
if (texture_index == -1) {
continue;
}
auto* call_func = call->Stmt()->Function();
std::vector<const sem::Function*> entry_points;
if (call_func->Declaration()->IsEntryPoint()) {
entry_points = {call_func};
} else {
entry_points = call_func->AncestorEntryPoints();
}
if (entry_points.empty()) {
continue;
}
auto* t = c->args[static_cast<size_t>(texture_index)];
auto* s = c->args[static_cast<size_t>(sampler_index)];
GetOriginatingResources(std::array<const ast::Expression*, 2>{t, s},
[&](std::array<const sem::GlobalVariable*, 2> globals) {
auto texture_binding_point = globals[0]->BindingPoint();
auto sampler_binding_point = globals[1]->BindingPoint();
for (auto* entry_point : entry_points) {
const auto& ep_name = program_->Symbols().NameFor(
entry_point->Declaration()->name->symbol);
(*sampler_targets_)[ep_name].Add(
{sampler_binding_point, texture_binding_point});
}
});
}
}
std::tuple<InterpolationType, InterpolationSampling> Inspector::CalculateInterpolationData(
const type::Type* type,
utils::VectorRef<const ast::Attribute*> attributes) const {
auto* interpolation_attribute = ast::GetAttribute<ast::InterpolateAttribute>(attributes);
if (type->is_integer_scalar_or_vector()) {
return {InterpolationType::kFlat, InterpolationSampling::kNone};
}
if (!interpolation_attribute) {
return {InterpolationType::kPerspective, InterpolationSampling::kCenter};
}
auto& sem = program_->Sem();
auto ast_interpolation_type = sem.Get<sem::BuiltinEnumExpression<builtin::InterpolationType>>(
interpolation_attribute->type)
->Value();
auto ast_sampling_type = builtin::InterpolationSampling::kUndefined;
if (interpolation_attribute->sampling) {
ast_sampling_type = sem.Get<sem::BuiltinEnumExpression<builtin::InterpolationSampling>>(
interpolation_attribute->sampling)
->Value();
}
if (ast_interpolation_type != builtin::InterpolationType::kFlat &&
ast_sampling_type == builtin::InterpolationSampling::kUndefined) {
ast_sampling_type = builtin::InterpolationSampling::kCenter;
}
auto interpolation_type = InterpolationType::kUnknown;
switch (ast_interpolation_type) {
case builtin::InterpolationType::kPerspective:
interpolation_type = InterpolationType::kPerspective;
break;
case builtin::InterpolationType::kLinear:
interpolation_type = InterpolationType::kLinear;
break;
case builtin::InterpolationType::kFlat:
interpolation_type = InterpolationType::kFlat;
break;
case builtin::InterpolationType::kUndefined:
break;
}
auto sampling_type = InterpolationSampling::kUnknown;
switch (ast_sampling_type) {
case builtin::InterpolationSampling::kUndefined:
sampling_type = InterpolationSampling::kNone;
break;
case builtin::InterpolationSampling::kCenter:
sampling_type = InterpolationSampling::kCenter;
break;
case builtin::InterpolationSampling::kCentroid:
sampling_type = InterpolationSampling::kCentroid;
break;
case builtin::InterpolationSampling::kSample:
sampling_type = InterpolationSampling::kSample;
break;
}
return {interpolation_type, sampling_type};
}
template <size_t N, typename F>
void Inspector::GetOriginatingResources(std::array<const ast::Expression*, N> exprs, F&& callback) {
if (TINT_UNLIKELY(!program_->IsValid())) {
TINT_ICE(Inspector, diagnostics_)
<< "attempting to get originating resources in invalid program";
return;
}
auto& sem = program_->Sem();
std::array<const sem::GlobalVariable*, N> globals{};
std::array<const sem::Parameter*, N> parameters{};
utils::UniqueVector<const ast::CallExpression*, 8> callsites;
for (size_t i = 0; i < N; i++) {
const sem::Variable* root_ident = sem.GetVal(exprs[i])->RootIdentifier();
if (auto* global = root_ident->As<sem::GlobalVariable>()) {
globals[i] = global;
} else if (auto* param = root_ident->As<sem::Parameter>()) {
auto* func = tint::As<sem::Function>(param->Owner());
if (func->CallSites().empty()) {
// One or more of the expressions is a parameter, but this function
// is not called. Ignore.
return;
}
for (auto* call : func->CallSites()) {
callsites.Add(call->Declaration());
}
parameters[i] = param;
} else {
TINT_ICE(Inspector, diagnostics_)
<< "cannot resolve originating resource with expression type "
<< exprs[i]->TypeInfo().name;
return;
}
}
if (callsites.Length()) {
for (auto* call_expr : callsites) {
// Make a copy of the expressions for this callsite
std::array<const ast::Expression*, N> call_exprs = exprs;
// Patch all the parameter expressions with their argument
for (size_t i = 0; i < N; i++) {
if (auto* param = parameters[i]) {
call_exprs[i] = call_expr->args[param->Index()];
}
}
// Now call GetOriginatingResources() with from the callsite
GetOriginatingResources(call_exprs, callback);
}
} else {
// All the expressions resolved to globals
callback(globals);
}
}
} // namespace tint::inspector