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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_AST_SAMPLER_H_
#define SRC_AST_SAMPLER_H_
#include <string>
#include "src/ast/type.h"
namespace tint {
namespace ast {
/// The different kinds of samplers
enum class SamplerKind {
/// A regular sampler
kSampler,
/// A comparison sampler
kComparisonSampler
};
/// @param out the std::ostream to write to
/// @param kind the SamplerKind
/// @return the std::ostream so calls can be chained
std::ostream& operator<<(std::ostream& out, SamplerKind kind);
/// A sampler type.
class Sampler : public Castable<Sampler, Type> {
public:
/// Constructor
/// @param program_id the identifier of the program that owns this node
/// @param source the source of this node
/// @param kind the kind of sampler
Sampler(ProgramID program_id, const Source& source, SamplerKind kind);
/// Move constructor
Sampler(Sampler&&);
~Sampler() override;
/// @returns the sampler type
SamplerKind kind() const { return kind_; }
/// @returns true if this is a comparison sampler
bool IsComparison() const { return kind_ == SamplerKind::kComparisonSampler; }
/// @returns the name for this type
std::string type_name() const override;
/// @param symbols the program's symbol table
/// @returns the name for this type that closely resembles how it would be
/// declared in WGSL.
std::string FriendlyName(const SymbolTable& symbols) const override;
/// Clones this type and all transitive types using the `CloneContext` `ctx`.
/// @param ctx the clone context
/// @return the newly cloned type
Sampler* Clone(CloneContext* ctx) const override;
private:
SamplerKind const kind_;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_SAMPLER_H_