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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_READER_SPIRV_ENTRY_POINT_INFO_H_
#define SRC_TINT_READER_SPIRV_ENTRY_POINT_INFO_H_
#include <cstdint>
#include <string>
#include <vector>
#include "src/tint/ast/pipeline_stage.h"
namespace tint::reader::spirv {
/// The size of an integer-coordinate grid, in the x, y, and z dimensions.
struct GridSize {
/// x value
uint32_t x = 0;
/// y value
uint32_t y = 0;
/// z value
uint32_t z = 0;
};
/// Entry point information for a function
struct EntryPointInfo {
/// Constructor.
/// @param the_name the name of the entry point
/// @param the_stage the pipeline stage
/// @param the_owns_inner_implementation if true, this entry point is
/// responsible for generating the inner implementation function.
/// @param the_inner_name the name of the inner implementation function of the
/// entry point
/// @param the_inputs list of IDs for Input variables used by the shader
/// @param the_outputs list of IDs for Output variables used by the shader
/// @param the_wg_size the workgroup_size, for a compute shader
EntryPointInfo(std::string the_name,
ast::PipelineStage the_stage,
bool the_owns_inner_implementation,
std::string the_inner_name,
std::vector<uint32_t>&& the_inputs,
std::vector<uint32_t>&& the_outputs,
GridSize the_wg_size);
/// Copy constructor
/// @param other the other entry point info to be built from
EntryPointInfo(const EntryPointInfo& other);
/// Destructor
~EntryPointInfo();
/// The entry point name.
/// In the WGSL output, this function will have pipeline inputs and outputs
/// as parameters. This function will store them into Private variables,
/// and then call the "inner" function, named by the next memeber.
/// Then outputs are copied from the private variables to the return value.
std::string name;
/// The entry point stage
ast::PipelineStage stage = ast::PipelineStage::kNone;
/// True when this entry point is responsible for generating the
/// inner implementation function. False when this is the second entry
/// point encountered for the same function in SPIR-V. It's unusual, but
/// possible for the same function to be the implementation for multiple
/// entry points.
bool owns_inner_implementation;
/// The name of the inner implementation function of the entry point.
std::string inner_name;
/// IDs of pipeline input variables, sorted and without duplicates.
std::vector<uint32_t> inputs;
/// IDs of pipeline output variables, sorted and without duplicates.
std::vector<uint32_t> outputs;
/// If this is a compute shader, this is the workgroup size in the x, y,
/// and z dimensions set via LocalSize, or via the composite value
/// decorated as the WorkgroupSize BuiltIn. The WorkgroupSize builtin
/// takes priority.
GridSize workgroup_size;
};
} // namespace tint::reader::spirv
#endif // SRC_TINT_READER_SPIRV_ENTRY_POINT_INFO_H_
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