swizzle_node.hpp

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#ifndef OGLPLUS_TEXGEN_SWIZZLE_NODE_HPP
#define OGLPLUS_TEXGEN_SWIZZLE_NODE_HPP
 
#include "base_node.hpp"
#include "fallback_input.hpp"
#include <string>
 
namespace eagine::oglp::texgen {
 
bool is_valid_swizzle(string_view) noexcept;
 
class swizzle_output : public base_output {
public:
    std::string swizzle;
    input_with_const_default<float[4]> input;
 
    swizzle_output(node_intf& parent);
    swizzle_output(node_intf& parent, std::string swizzle);
 
    string_view type_name() override;
 
    slot_data_type value_type() override;
 
    std::ostream& definitions(std::ostream& out, compile_context& ctxt) override;
};
 
class swizzle_node
  : public unary_single_output_node<
      swizzle_output,
      decltype(swizzle_output::input),
      &swizzle_output::input> {
public:
    swizzle_node() = default;
 
    swizzle_node& set_swizzle(const std::string& swizzle) {
        if(is_valid_swizzle(string_view(swizzle))) {
            _output.swizzle = swizzle;
        }
        return *this;
    }
};
 
} // namespace eagine::oglp::texgen
 
#if !OGLPLUS_LINK_LIBRARY || defined(OGLPLUS_IMPLEMENTING_LIBRARY)
#include <oglplus/texgen/swizzle_node.inl>
#endif
 
#endif // OGLPLUS_TEXGEN_SWIZZLE_NODE_HPP