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97668c8c37
Add `transform::DecomposeStridedMatrix`, which replaces matrix members of storage or uniform buffer structures, that have a [[stride]] decoration, into an array of N column vectors. This is required to correctly handle `mat2x2` matrices in UBOs, as std140 rules will expect a default stride of 16 bytes, when in WGSL the default structure layout expects a stride of 8 bytes. Bug: tint:1047 Change-Id: If5ca3c6ec087bbc1ac31a8d9a657b99bf34042a4 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/59840 Reviewed-by: David Neto <dneto@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
// Copyright 2021 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_TRANSFORM_DECOMPOSE_STRIDED_MATRIX_H_
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#define SRC_TRANSFORM_DECOMPOSE_STRIDED_MATRIX_H_
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#include "src/transform/transform.h"
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namespace tint {
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namespace transform {
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/// DecomposeStridedMatrix transforms replaces matrix members of storage or
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/// uniform buffer structures, that have a [[stride]] decoration, into an array
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/// of N column vectors.
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/// This transform is used by the SPIR-V reader to handle the SPIR-V
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/// MatrixStride decoration.
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class DecomposeStridedMatrix
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: public Castable<DecomposeStridedMatrix, Transform> {
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public:
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/// Constructor
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DecomposeStridedMatrix();
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/// Destructor
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~DecomposeStridedMatrix() override;
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/// @param program the program to inspect
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/// @returns true if this transform should be run for the given program
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static bool ShouldRun(const Program* program);
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protected:
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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) override;
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};
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} // namespace transform
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} // namespace tint
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#endif // SRC_TRANSFORM_DECOMPOSE_STRIDED_MATRIX_H_
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