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The Castable class is used by utils/. This Cl moves the implementation into the utils/ folder. The `Is` and `As` methods are added into the `tint` namespace to make usage shorter. Change-Id: I0decedb92ebed01b6aa12d2e3efa7190742e9a33 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/127402 Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
// Copyright 2022 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TINT_TRANSFORM_PRESERVE_PADDING_H_
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#define SRC_TINT_TRANSFORM_PRESERVE_PADDING_H_
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#include "src/tint/transform/transform.h"
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namespace tint::transform {
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/// Decompose assignments of whole structure and array types to preserve padding bytes.
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///
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/// WGSL states that memory operations on structures and arrays will not access padding bytes. To
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/// avoid overwriting padding bytes when writing to buffers, this transform decomposes those
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/// assignments into element-wise assignments via helper functions.
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///
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/// @note Assumes that the DirectVariableTransform will be run afterwards for backends that need it.
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class PreservePadding final : public utils::Castable<PreservePadding, Transform> {
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public:
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/// Constructor
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PreservePadding();
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/// Destructor
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~PreservePadding() override;
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/// @copydoc Transform::Apply
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ApplyResult Apply(const Program* program,
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const DataMap& inputs,
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DataMap& outputs) const override;
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private:
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struct State;
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};
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} // namespace tint::transform
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#endif // SRC_TINT_TRANSFORM_PRESERVE_PADDING_H_
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