48 lines
1.8 KiB
C++
48 lines
1.8 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_WRITER_APPEND_VECTOR_H_
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#define SRC_WRITER_APPEND_VECTOR_H_
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#include "src/program_builder.h"
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namespace tint {
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namespace ast {
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class Expression;
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class TypeConstructorExpression;
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} // namespace ast
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namespace writer {
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/// A helper function used to append a vector with an additional scalar.
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/// AppendVector is used to generate texture intrinsic function calls for
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/// backends that expect the texture coordinates to be packed with an additional
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/// mip-level or array-index parameter.
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/// All types must have been assigned to the expressions and their child nodes
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/// before calling.
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/// @param builder the program builder.
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/// @param vector the vector to be appended. May be a scalar, `vec2` or `vec3`.
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/// @param scalar the scalar to append to the vector. Must be a scalar.
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/// @returns a vector expression containing the elements of `vector` followed by
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/// the single element of `scalar` cast to the `vector` element type.
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ast::TypeConstructorExpression* AppendVector(ProgramBuilder* builder,
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ast::Expression* vector,
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ast::Expression* scalar);
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} // namespace writer
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} // namespace tint
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#endif // SRC_WRITER_APPEND_VECTOR_H_
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