render_node.hpp

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#ifndef OGLPLUS_TEXGEN_RENDER_NODE_HPP
#define OGLPLUS_TEXGEN_RENDER_NODE_HPP
 
#include "../buffer.hpp"
#include "../program.hpp"
#include "../uniform.hpp"
#include "../vertex_array.hpp"
#include "base_node.hpp"
#include "fallback_input.hpp"
#include <eagine/valid_if/positive.hpp>
 
namespace eagine::oglp::texgen {
 
class render_node : public base_node {
private:
    input_with_const_default<float[4]> _input;
 
    owned<program_name> _prog;
    owned<buffer_name> _data;
    owned<vertex_array_name> _vao;
 
    uniform_location _voxel_size;
 
    void _init_screen();
    void _update_program();
 
    bool _needs_update{false};
 
    int _xdiv{1}, _ydiv{1}, _tile{0};
 
    unsigned _render_version{0};
    render_params _render_params{};
 
public:
    render_node();
    render_node(render_node&&) noexcept = default;
    render_node(const render_node&) = delete;
    render_node& operator=(render_node&&) = delete;
    render_node& operator=(const render_node&) = delete;
    ~render_node() override;
 
    std::ostream& make_fragment_shader_source(std::ostream&, compile_context&);
 
    void draw_screen();
 
    string_view type_name() override;
 
    span_size_t input_count() override;
 
    input_intf& input(span_size_t index) override;
 
    void update_needed() override;
 
    void update_if_needed();
 
    bool render(const render_params&) override;
 
    bool render();
 
    void set_divisions(
      const valid_if_positive<int>& xdiv,
      const valid_if_positive<int>& ydiv);
 
    void set_dimensions(
      const valid_if_positive<int>& width,
      const valid_if_positive<int>& height);
};
 
} // namespace eagine::oglp::texgen
 
#if !OGLPLUS_LINK_LIBRARY || defined(OGLPLUS_IMPLEMENTING_LIBRARY)
#include <oglplus/texgen/render_node.inl>
#endif
 
#endif // OGLPLUS_TEXGEN_RENDER_NODE_HPP