extensions.hpp

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#ifndef EGLPLUS_EGL_API_EXTENSIONS_HPP
#define EGLPLUS_EGL_API_EXTENSIONS_HPP
 
#include "objects.hpp"
 
namespace eagine::eglp {
 
template <typename ApiTraits>
class basic_egl_operations;
 
template <typename ApiTraits, typename...>
class basic_egl_extension {
public:
    constexpr basic_egl_extension(
      string_view name,
      ApiTraits&,
      const basic_egl_operations<ApiTraits>& api) noexcept
      : _api{api}
      , _name{name} {}
 
    explicit operator bool() const noexcept {
        return _api.has_extension(_name);
    }
 
    auto operator()() const noexcept -> bool {
        return _api.has_extension(_name);
    }
 
private:
    const basic_egl_operations<ApiTraits>& _api;
    string_view _name;
};
 
template <typename ApiTraits>
class basic_egl_extension<ApiTraits, display_handle> {
public:
    constexpr basic_egl_extension(
      string_view name,
      ApiTraits&,
      const basic_egl_operations<ApiTraits>& api) noexcept
      : _api{api}
      , _name{name} {}
 
    auto operator()(display_handle disp) const noexcept -> bool {
        return _api.has_extension(disp, _name);
    }
 
private:
    const basic_egl_operations<ApiTraits>& _api;
    string_view _name;
};
 
template <typename ApiTraits>
class basic_egl_extension<ApiTraits, device_handle> {
public:
    constexpr basic_egl_extension(
      string_view name,
      ApiTraits&,
      const basic_egl_operations<ApiTraits>& api) noexcept
      : _api{api}
      , _name{name} {}
 
    auto operator()(device_handle dev) const noexcept -> bool {
        return _api.has_extension(dev, _name);
    }
 
private:
    const basic_egl_operations<ApiTraits>& _api;
    string_view _name;
};
 
} // namespace eagine::eglp
 
#endif // EGLPLUS_EGL_API_EXTENSIONS_HPP