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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>
71 lines
2.5 KiB
C++
71 lines
2.5 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_PACKED_VEC3_H_
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#define SRC_TINT_TRANSFORM_PACKED_VEC3_H_
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#include <string>
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#include "src/tint/ast/internal_attribute.h"
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#include "src/tint/transform/transform.h"
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namespace tint::transform {
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/// A transform to be used by the MSL backend which will:
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/// * Apply the `@internal('packed_vector')` attribute (PackedVec3::Attribute) to all host-sharable
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/// structure members that have a vec3<T> type.
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/// * Cast all direct (not sub-accessed) loads of these packed vectors to the 'unpacked' vec3<T>
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/// type before usage.
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///
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/// This transform papers over overload holes in the MSL standard library where an MSL
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/// `packed_vector` type cannot be interchangable used as a regular `vec` type.
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class PackedVec3 final : public Castable<PackedVec3, Transform> {
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public:
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/// Attribute is the attribute applied to padded vector structure members.
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class Attribute final : public Castable<Attribute, ast::InternalAttribute> {
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public:
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/// Constructor
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/// @param pid the identifier of the program that owns this node
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/// @param nid the unique node identifier
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Attribute(ProgramID pid, ast::NodeID nid);
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/// Destructor
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~Attribute() override;
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/// @returns "packed_vector".
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std::string InternalName() const override;
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/// Performs a deep clone of this object using the CloneContext `ctx`.
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/// @param ctx the clone context
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/// @return the newly cloned object
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const Attribute* Clone(CloneContext* ctx) const override;
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};
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/// Constructor
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PackedVec3();
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/// Destructor
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~PackedVec3() 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_PACKED_VEC3_H_
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