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// Copyright 2021 The Dawn 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 DAWNNATIVE_CHAIN_UTILS_H_
#define DAWNNATIVE_CHAIN_UTILS_H_
#include "dawn_native/dawn_platform.h"
#include "dawn_native/Error.h"
namespace dawn_native {
{% for value in types["s type"].values %}
{% if value.valid %}
void FindInChain(const ChainedStruct* chain, const {{as_cppEnum(value.name)}}** out);
{% endif %}
{% endfor %}
// Verifies that |chain| only contains ChainedStructs of types enumerated in
// |oneOfConstraints| and contains no duplicate sTypes. Each vector in
// |oneOfConstraints| defines a set of sTypes that cannot coexist in the same chain.
// For example:
// ValidateSTypes(chain, { { ShaderModuleSPIRVDescriptor, ShaderModuleWGSLDescriptor } }))
// ValidateSTypes(chain, { { Extension1 }, { Extension2 } })
MaybeError ValidateSTypes(const ChainedStruct* chain,
std::vector<std::vector<wgpu::SType>> oneOfConstraints);
template <typename T>
MaybeError ValidateSingleSTypeInner(const ChainedStruct* chain, T sType) {
if (chain->sType != sType) {
return DAWN_VALIDATION_ERROR("Unsupported sType");
}
return {};
}
template <typename T, typename... Args>
MaybeError ValidateSingleSTypeInner(const ChainedStruct* chain, T sType, Args... sTypes) {
if (chain->sType == sType) {
return {};
}
return ValidateSingleSTypeInner(chain, sTypes...);
}
// Verifies that |chain| contains a single ChainedStruct of type |sType| or no ChainedStructs
// at all.
template <typename T>
MaybeError ValidateSingleSType(const ChainedStruct* chain, T sType) {
if (chain == nullptr) {
return {};
}
if (chain->nextInChain != nullptr) {
return DAWN_VALIDATION_ERROR("Chain can only contain a single chained struct");
}
return ValidateSingleSTypeInner(chain, sType);
}
// Verifies that |chain| contains a single ChainedStruct with a type enumerated in the
// parameter pack or no ChainedStructs at all.
template <typename T, typename... Args>
MaybeError ValidateSingleSType(const ChainedStruct* chain, T sType, Args... sTypes) {
if (chain == nullptr) {
return {};
}
if (chain->nextInChain != nullptr) {
return DAWN_VALIDATION_ERROR("Chain can only contain a single chained struct");
}
return ValidateSingleSTypeInner(chain, sType, sTypes...);
}
} // namespace dawn_native
#endif // DAWNNATIVE_CHAIN_UTILS_H_