| /* |
| * 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_SETTING |
| #define SKSL_SETTING |
| |
| #include "include/private/SkSLIRNode.h" |
| #include "include/sksl/SkSLPosition.h" |
| #include "src/sksl/SkSLUtil.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| |
| #include <cstdint> |
| #include <memory> |
| #include <string> |
| #include <string_view> |
| |
| |
| namespace SkSL { |
| |
| class Context; |
| class Type; |
| enum class OperatorPrecedence : uint8_t; |
| |
| /** |
| * Represents a compile-time constant setting, such as sk_Caps.integerSupport. These IRNodes are |
| * used when assembling a module. These nodes are replaced with the value of the setting during |
| * compilation when ShaderCaps are available. |
| */ |
| class Setting final : public Expression { |
| public: |
| inline static constexpr Kind kIRNodeKind = Kind::kSetting; |
| |
| using CapsPtr = const bool ShaderCaps::*; |
| |
| Setting(Position pos, CapsPtr capsPtr, const Type* type) |
| : INHERITED(pos, kIRNodeKind, type) |
| , fCapsPtr(capsPtr) {} |
| |
| // Creates the current value of the associated caps bit as a Literal if ShaderCaps are |
| // available, or a Setting IRNode when ShaderCaps are not known. Reports errors via the |
| // ErrorReporter. |
| static std::unique_ptr<Expression> Convert(const Context& context, |
| Position pos, |
| const std::string_view& name); |
| |
| // Creates the current value of the passed-in caps bit as a Literal if ShaderCaps are |
| // available, or a Setting IRNode when ShaderCaps are not known. |
| static std::unique_ptr<Expression> Make(const Context& context, Position pos, CapsPtr capsPtr); |
| |
| // Converts a Setting expression to its actual ShaderCaps value (boolean true/false). |
| std::unique_ptr<Expression> toLiteral(const Context& context) const; |
| |
| std::unique_ptr<Expression> clone(Position pos) const override { |
| return std::make_unique<Setting>(pos, fCapsPtr, &this->type()); |
| } |
| |
| std::string_view name() const; |
| |
| std::string description(OperatorPrecedence) const override { |
| return "sk_Caps." + std::string(this->name()); |
| } |
| |
| private: |
| CapsPtr fCapsPtr; |
| |
| using INHERITED = Expression; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |