blob: aaa92bb76db8528c36499a31d99d9652e8161f8e [file] [log] [blame]
* Copyright 2021 Google LLC
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "src/sksl/SkSLContext.h"
#include "src/sksl/ir/SkSLConstructor.h"
#include "src/sksl/ir/SkSLExpression.h"
#include <memory>
namespace SkSL {
* Represents the construction of a vector splat, such as `half3(n)`.
* These always contain exactly 1 scalar.
class ConstructorSplat final : public SingleArgumentConstructor {
inline static constexpr Kind kExpressionKind = Kind::kConstructorSplat;
ConstructorSplat(int line, const Type& type, std::unique_ptr<Expression> arg)
: INHERITED(line, kExpressionKind, &type, std::move(arg)) {}
ConstructorSplat(const Expression& scalar, const Type& type)
: ConstructorSplat(scalar.fLine, type, scalar.clone()) {
SkASSERT(type.componentType() == scalar.type());
// The input argument must be scalar. A "splat" to a scalar type will be optimized into a no-op.
static std::unique_ptr<Expression> Make(const Context& context,
int line,
const Type& type,
std::unique_ptr<Expression> arg);
std::unique_ptr<Expression> clone() const override {
return std::make_unique<ConstructorSplat>(fLine, this->type(), argument()->clone());
bool allowsConstantSubexpressions() const override {
return true;
const Expression* getConstantSubexpression(int n) const override {
SkASSERT(n >= 0 && n < this->type().columns());
return this->argument()->getConstantSubexpression(0);
using INHERITED = SingleArgumentConstructor;
} // namespace SkSL