| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_FIELDACCESS |
| #define SKSL_FIELDACCESS |
| |
| #include "src/sksl/SkSLUtil.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| |
| namespace SkSL { |
| |
| enum class FieldAccessOwnerKind : int8_t { |
| kDefault, |
| // this field access is to a field of an anonymous interface block (and thus, the field name |
| // is actually in global scope, so only the field name needs to be written in GLSL) |
| kAnonymousInterfaceBlock |
| }; |
| |
| /** |
| * An expression which extracts a field from a struct, as in 'foo.bar'. |
| */ |
| class FieldAccess final : public Expression { |
| public: |
| using OwnerKind = FieldAccessOwnerKind; |
| |
| static constexpr Kind kExpressionKind = Kind::kFieldAccess; |
| |
| FieldAccess(std::unique_ptr<Expression> base, int fieldIndex, |
| OwnerKind ownerKind = OwnerKind::kDefault) |
| : INHERITED(base->fOffset, kExpressionKind, base->type().fields()[fieldIndex].fType) |
| , fFieldIndex(fieldIndex) |
| , fOwnerKind(ownerKind) |
| , fBase(std::move(base)) {} |
| |
| // Returns a field-access expression; reports errors via the ErrorReporter. |
| static std::unique_ptr<Expression> Convert(const Context& context, |
| SymbolTable& symbolTable, |
| std::unique_ptr<Expression> base, |
| skstd::string_view field); |
| |
| // Returns a field-access expression; reports errors via ASSERT. |
| static std::unique_ptr<Expression> Make(const Context& context, |
| std::unique_ptr<Expression> base, |
| int fieldIndex, |
| OwnerKind ownerKind = OwnerKind::kDefault); |
| |
| std::unique_ptr<Expression>& base() { |
| return fBase; |
| } |
| |
| const std::unique_ptr<Expression>& base() const { |
| return fBase; |
| } |
| |
| int fieldIndex() const { |
| return fFieldIndex; |
| } |
| |
| OwnerKind ownerKind() const { |
| return fOwnerKind; |
| } |
| |
| bool hasProperty(Property property) const override { |
| return this->base()->hasProperty(property); |
| } |
| |
| std::unique_ptr<Expression> clone() const override { |
| return std::unique_ptr<Expression>(new FieldAccess(this->base()->clone(), |
| this->fieldIndex(), |
| this->ownerKind())); |
| } |
| |
| String description() const override { |
| return this->base()->description() + "." + |
| this->base()->type().fields()[this->fieldIndex()].fName; |
| } |
| |
| private: |
| int fFieldIndex; |
| FieldAccessOwnerKind fOwnerKind; |
| std::unique_ptr<Expression> fBase; |
| |
| using INHERITED = Expression; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |