48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
// Copyright 2020 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_EMIT_VERTEX_POINT_SIZE_H_
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#define SRC_TRANSFORM_EMIT_VERTEX_POINT_SIZE_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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/// EmitVertexPointSize is a Transform that adds a PointSize builtin global
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/// output variable to the module which is assigned 1.0 as the new first
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/// statement for all vertex stage entry points.
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/// If the module does not contain a vertex pipeline stage entry point then then
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/// this transform is a no-op.
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class EmitVertexPointSize : public Transform {
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public:
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/// Constructor
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EmitVertexPointSize();
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/// Destructor
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~EmitVertexPointSize() override;
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/// Runs the transform on `module`, returning the transformation result.
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/// @note Users of Tint should register the transform with transform manager
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/// and invoke its Run(), instead of directly calling the transform's Run().
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/// Calling Run() directly does not perform module state cleanup operations.
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/// @param module the source module to transform
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/// @returns the transformation result
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Output Run(ast::Module* module) override;
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};
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} // namespace transform
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} // namespace tint
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#endif // SRC_TRANSFORM_EMIT_VERTEX_POINT_SIZE_H_
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