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c6b381495d
Replace the ShouldRun() method with Apply() which will do the transformation if it needs to be done, otherwise returns 'SkipTransform'. This reduces a bunch of duplicated scanning between the old ShouldRun() and Transform(). This change also adjusts code style to make the transforms more consistent. Change-Id: I9a6b10cb8b4ed62676b12ef30fb7764d363386c6 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107681 Reviewed-by: James Price <jrprice@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
49 lines
1.8 KiB
C++
49 lines
1.8 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_STD140_H_
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#define SRC_TINT_TRANSFORM_STD140_H_
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#include "src/tint/transform/transform.h"
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namespace tint::transform {
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/// Std140 is a transform that forks types used in the uniform address space that contain
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/// `matNx2<f32>` matrices into `N`x`vec2<f32>` column vectors. Types that transitively use these
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/// forked types are also forked. `var<uniform>` variables will use these forked types, and
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/// expressions loading from these variables will do appropriate conversions to the regular WGSL
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/// types. As `matNx2<f32>` matrices are the only type that violate std140-layout, this
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/// transformation is sufficient to have any WGSL structure be std140-layout conformant.
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///
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/// @note This transform requires the PromoteSideEffectsToDecl transform to have been run first.
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class Std140 final : public Castable<Std140, Transform> {
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public:
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/// Constructor
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Std140();
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/// Destructor
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~Std140() 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_STD140_H_
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