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Renderer/ShaderBuilder: Add builder for builtins

This commit is contained in:
Lynix 2017-01-05 14:04:29 +01:00
parent e82fb7fef4
commit 386c3b1132
1 changed files with 21 additions and 0 deletions
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21
include/Nazara/Renderer/ShaderBuilder.hpp
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@ -44,6 +44,26 @@ namespace Nz { namespace ShaderBuilder
}
};
class BuiltinBuilder
{
public:
std::shared_ptr<Nz::ShaderAst::Variable> operator()(Nz::ShaderAst::Builtin builtin) const
{
ShaderAst::ExpressionType exprType = ShaderAst::ExpressionType::None;
switch (builtin)
{
case ShaderAst::Builtin::VertexPosition:
exprType = ShaderAst::ExpressionType::Float4;
break;
}
NazaraAssert(exprType != ShaderAst::ExpressionType::None, "Unhandled builtin");
return std::make_shared<Nz::ShaderAst::BuiltinVariable>(builtin, exprType);
}
};
template<Nz::ShaderAst::VariableType type>
class VarBuilder
{
@ -57,6 +77,7 @@ namespace Nz { namespace ShaderBuilder
constexpr BinOpBuilder<Nz::ShaderAst::BinaryType::Add> Add;
constexpr AssignOpBuilder<Nz::ShaderAst::AssignType::Simple> Assign;
constexpr BuiltinBuilder Builtin;
constexpr BinOpBuilder<Nz::ShaderAst::BinaryType::Equality> Equal;
constexpr GenBuilder<Nz::ShaderAst::StatementBlock> Block;
constexpr GenBuilder<Nz::ShaderAst::Branch> Branch;