82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
// Copyright 2019 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <memory>
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#include <variant>
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#include "video_core/shader/expr.h"
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namespace VideoCommon::Shader {
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namespace {
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bool ExprIsBoolean(const Expr& expr) {
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return std::holds_alternative<ExprBoolean>(*expr);
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}
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bool ExprBooleanGet(const Expr& expr) {
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return std::get_if<ExprBoolean>(expr.get())->value;
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}
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} // Anonymous namespace
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bool ExprAnd::operator==(const ExprAnd& b) const {
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return (*operand1 == *b.operand1) && (*operand2 == *b.operand2);
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}
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bool ExprOr::operator==(const ExprOr& b) const {
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return (*operand1 == *b.operand1) && (*operand2 == *b.operand2);
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}
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bool ExprNot::operator==(const ExprNot& b) const {
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return (*operand1 == *b.operand1);
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}
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Expr MakeExprNot(Expr first) {
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if (std::holds_alternative<ExprNot>(*first)) {
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return std::get_if<ExprNot>(first.get())->operand1;
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}
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return MakeExpr<ExprNot>(std::move(first));
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}
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Expr MakeExprAnd(Expr first, Expr second) {
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if (ExprIsBoolean(first)) {
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return ExprBooleanGet(first) ? second : first;
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}
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if (ExprIsBoolean(second)) {
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return ExprBooleanGet(second) ? first : second;
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}
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return MakeExpr<ExprAnd>(std::move(first), std::move(second));
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}
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Expr MakeExprOr(Expr first, Expr second) {
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if (ExprIsBoolean(first)) {
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return ExprBooleanGet(first) ? first : second;
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}
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if (ExprIsBoolean(second)) {
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return ExprBooleanGet(second) ? second : first;
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}
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return MakeExpr<ExprOr>(std::move(first), std::move(second));
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}
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bool ExprAreEqual(const Expr& first, const Expr& second) {
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return (*first) == (*second);
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}
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bool ExprAreOpposite(const Expr& first, const Expr& second) {
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if (std::holds_alternative<ExprNot>(*first)) {
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return ExprAreEqual(std::get_if<ExprNot>(first.get())->operand1, second);
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}
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if (std::holds_alternative<ExprNot>(*second)) {
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return ExprAreEqual(std::get_if<ExprNot>(second.get())->operand1, first);
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}
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return false;
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}
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bool ExprIsTrue(const Expr& first) {
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if (ExprIsBoolean(first)) {
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return ExprBooleanGet(first);
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}
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return false;
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}
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} // namespace VideoCommon::Shader
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