[transform] Add a simple transform manager.

This CL holds a simpler manager to hold and execute multiple transforms.

Bug: tint:206
Change-Id: I45f6b55134f871167704f3549c4e4c72ef806c3a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/29121
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
This commit is contained in:
dan sinclair 2020-09-29 23:54:03 +00:00 committed by Commit Bot service account
parent 58f2e9cf6a
commit 5bb9b75684
4 changed files with 96 additions and 0 deletions

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@ -375,6 +375,8 @@ source_set("libtint_core_src") {
"src/source.h",
"src/transform/bound_array_accessors_transform.cc",
"src/transform/bound_array_accessors_transform.h",
"src/transform/manager.cc",
"src/transform/manager.h",
"src/transform/transformer.cc",
"src/transform/transformer.h",
"src/transform/vertex_pulling_transform.cc",

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@ -196,6 +196,8 @@ set(TINT_LIB_SRCS
source.h
transform/bound_array_accessors_transform.cc
transform/bound_array_accessors_transform.h
transform/manager.cc
transform/manager.h
transform/transformer.cc
transform/transformer.h
transform/vertex_pulling_transform.cc

35
src/transform/manager.cc Normal file
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@ -0,0 +1,35 @@
// 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.
#include "src/transform/manager.h"
namespace tint {
namespace transform {
Manager::Manager() = default;
Manager::~Manager() = default;
bool Manager::Run() {
for (auto& transform : transforms_) {
if (!transform->Run()) {
error_ = transform->error();
return false;
}
}
return true;
}
} // namespace transform
} // namespace tint

57
src/transform/manager.h Normal file
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@ -0,0 +1,57 @@
// 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_TRANSFORM_MANAGER_H_
#define SRC_TRANSFORM_MANAGER_H_
#include <memory>
#include <string>
#include "src/transform/transformer.h"
namespace tint {
namespace transform {
/// Manager for the provided passes. The passes will be execute in the
/// appended order. If any pass fails the manager will return immediately and
/// the error can be retrieved with the |error| method.
class Manager {
public:
/// Constructor
Manager();
~Manager();
/// Add pass to the manager
/// @param transform the transform to append
void append(std::unique_ptr<Transformer> transform) {
transforms_.push_back(std::move(transform));
}
/// Runs the transforms
/// @returns true on success; false otherwise
bool Run();
/// @returns the error, or blank if none set
std::string error() const { return error_; }
private:
std::vector<std::unique_ptr<Transformer>> transforms_;
std::string error_;
};
} // namespace transform
} // namespace tint
#endif // SRC_TRANSFORM_MANAGER_H_