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90b29e500a
Fixed tint:1673 Fixed tint:1674 Change-Id: Ifa5d2a69131cc1e4679d4d43143f857c7ba46dbd Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/102640 Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: David Neto <dneto@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
57 lines
2.3 KiB
C++
57 lines
2.3 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 storage class 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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/// @param program the program to inspect
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/// @param data optional extra transform-specific input data
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/// @returns true if this transform should be run for the given program
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bool ShouldRun(const Program* program, const DataMap& data = {}) const override;
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private:
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struct State;
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/// Runs the transform using the CloneContext built for transforming a
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/// program. Run() is responsible for calling Clone() on the CloneContext.
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/// @param ctx the CloneContext primed with the input program and
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/// ProgramBuilder
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/// @param inputs optional extra transform-specific input data
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/// @param outputs optional extra transform-specific output data
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void Run(CloneContext& ctx, const DataMap& inputs, DataMap& outputs) const override;
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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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