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// Copyright 2021 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_TRANSFORM_BINDING_REMAPPER_H_
#define SRC_TRANSFORM_BINDING_REMAPPER_H_
#include <unordered_map>
#include "src/ast/access.h"
#include "src/sem/binding_point.h"
#include "src/transform/transform.h"
namespace tint {
namespace transform {
/// BindingPoint is an alias to sem::BindingPoint
using BindingPoint = sem::BindingPoint;
/// BindingRemapper is a transform used to remap resource binding points and
/// access controls.
class BindingRemapper : public Castable<BindingRemapper, Transform> {
public:
/// BindingPoints is a map of old binding point to new binding point
using BindingPoints = std::unordered_map<BindingPoint, BindingPoint>;
/// AccessControls is a map of old binding point to new access control
using AccessControls = std::unordered_map<BindingPoint, ast::Access>;
/// Remappings is consumed by the BindingRemapper transform.
/// Data holds information about shader usage and constant buffer offsets.
struct Remappings : public Castable<Data, transform::Data> {
/// Constructor
/// @param bp a map of new binding points
/// @param ac a map of new access controls
/// @param may_collide If true, then validation will be disabled for
/// binding point collisions generated by this transform
Remappings(BindingPoints bp, AccessControls ac, bool may_collide = true);
/// Copy constructor
Remappings(const Remappings&);
/// Destructor
~Remappings() override;
/// A map of old binding point to new binding point
const BindingPoints binding_points;
/// A map of old binding point to new access controls
const AccessControls access_controls;
/// If true, then validation will be disabled for binding point collisions
/// generated by this transform
const bool allow_collisions;
};
/// Constructor
BindingRemapper();
~BindingRemapper() override;
/// @param program the program to inspect
/// @param data optional extra transform-specific input data
/// @returns true if this transform should be run for the given program
bool ShouldRun(const Program* program,
const DataMap& data = {}) const override;
protected:
/// Runs the transform using the CloneContext built for transforming a
/// program. Run() is responsible for calling Clone() on the CloneContext.
/// @param ctx the CloneContext primed with the input program and
/// ProgramBuilder
/// @param inputs optional extra transform-specific input data
/// @param outputs optional extra transform-specific output data
void Run(CloneContext& ctx,
const DataMap& inputs,
DataMap& outputs) const override;
};
} // namespace transform
} // namespace tint
#endif // SRC_TRANSFORM_BINDING_REMAPPER_H_