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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.
#ifndef SRC_TINT_INSPECTOR_ENTRY_POINT_H_
#define SRC_TINT_INSPECTOR_ENTRY_POINT_H_
#include <optional>
#include <string>
#include <tuple>
#include <vector>
#include "tint/override_id.h"
#include "src/tint/ast/interpolate_attribute.h"
#include "src/tint/ast/pipeline_stage.h"
namespace tint::inspector {
/// Base component type of a stage variable.
enum class ComponentType {
kUnknown = -1,
kF32,
kU32,
kI32,
kF16,
};
/// Composition of components of a stage variable.
enum class CompositionType {
kUnknown = -1,
kScalar,
kVec2,
kVec3,
kVec4,
};
/// Type of interpolation of a stage variable.
enum class InterpolationType { kUnknown = -1, kPerspective, kLinear, kFlat };
/// Type of interpolation sampling of a stage variable.
enum class InterpolationSampling { kUnknown = -1, kNone, kCenter, kCentroid, kSample };
/// Reflection data about an entry point input or output.
struct StageVariable {
/// Constructor
StageVariable();
/// Copy constructor
/// @param other the StageVariable to copy
StageVariable(const StageVariable& other);
/// Destructor
~StageVariable();
/// Name of the variable in the shader.
std::string name;
/// Is location attribute present
bool has_location_attribute = false;
/// Value of the location attribute, only valid if #has_location_attribute is
/// true.
uint32_t location_attribute;
/// Scalar type that the variable is composed of.
ComponentType component_type = ComponentType::kUnknown;
/// How the scalars are composed for the variable.
CompositionType composition_type = CompositionType::kUnknown;
/// Interpolation type of the variable.
InterpolationType interpolation_type = InterpolationType::kUnknown;
/// Interpolation sampling of the variable.
InterpolationSampling interpolation_sampling = InterpolationSampling::kUnknown;
};
/// Reflection data about an override variable referenced by an entry point
struct Override {
/// Name of the override
std::string name;
/// ID of the override
OverrideId id;
/// Type of the scalar
enum class Type {
kBool,
kFloat32,
kUint32,
kInt32,
kFloat16,
};
/// Type of the scalar
Type type;
/// Does this override have an initializer?
bool is_initialized = false;
/// Does this override have a numeric ID specified explicitly?
bool is_id_specified = false;
};
/// The pipeline stage
enum class PipelineStage { kVertex, kFragment, kCompute };
/// WorkgroupSize describes the dimensions of the workgroup grid for a compute shader.
struct WorkgroupSize {
/// The 'x' dimension of the workgroup grid
uint32_t x = 1;
/// The 'y' dimension of the workgroup grid
uint32_t y = 1;
/// The 'z' dimension of the workgroup grid
uint32_t z = 1;
};
/// Reflection data for an entry point in the shader.
struct EntryPoint {
/// Constructors
EntryPoint();
/// Copy Constructor
EntryPoint(EntryPoint&);
/// Move Constructor
EntryPoint(EntryPoint&&);
~EntryPoint();
/// The entry point name
std::string name;
/// Remapped entry point name in the backend
std::string remapped_name;
/// The entry point stage
PipelineStage stage;
/// The workgroup size. If PipelineStage is kCompute and this holds no value, then the workgroup
/// size is derived from an override-expression. In this situation you first need to run the
/// tint::ast::transform::SubstituteOverride transform before using the inspector.
std::optional<WorkgroupSize> workgroup_size;
/// List of the input variable accessed via this entry point.
std::vector<StageVariable> input_variables;
/// List of the output variable accessed via this entry point.
std::vector<StageVariable> output_variables;
/// List of the pipeline overridable constants accessed via this entry point.
std::vector<Override> overrides;
/// Does the entry point use the sample_mask builtin as an input builtin
/// variable.
bool input_sample_mask_used = false;
/// Does the entry point use the sample_mask builtin as an output builtin
/// variable.
bool output_sample_mask_used = false;
/// Does the entry point use the position builtin as an input builtin
/// variable.
bool input_position_used = false;
/// Does the entry point use the front_facing builtin
bool front_facing_used = false;
/// Does the entry point use the sample_index builtin
bool sample_index_used = false;
/// Does the entry point use the num_workgroups builtin
bool num_workgroups_used = false;
/// Does the entry point use the frag_depth builtin
bool frag_depth_used = false;
};
} // namespace tint::inspector
#endif // SRC_TINT_INSPECTOR_ENTRY_POINT_H_