color.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * All rights reserved.                                                      *
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 * This program is free software; you can redistribute it and/or modify      *
 * it under the terms of the Mozilla Public License Version 2.0 as published *
 * by the Mozilla Foundation; either version 2 of the License, or            *
 * (at your option) any later version.                                       *
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 * This program is distributed in the hope that it will be useful,           *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_MESH_COMPONENTS_COLOR_H
#define VCL_MESH_COMPONENTS_COLOR_H
 
#include "base/component.h"
#include "base/predicates.h"
 
#include <vclib/space/core.h>
 
namespace vcl::comp {
 
template<typename ParentElemType = void, bool OPT = false>
class Color :
        public Component<
            Color<ParentElemType, OPT>,
            CompId::COLOR,
            vcl::Color,
            ParentElemType,
            !std::is_same_v<ParentElemType, void>,
            OPT>
{
    using Base = Component<
        Color<ParentElemType, OPT>,
        CompId::COLOR,
        vcl::Color,
        ParentElemType,
        !std::is_same_v<ParentElemType, void>,
        OPT>;
 
public:
    using ColorType = vcl::Color;
 
    /* Constructors */
 
    Color() = default;
 
    /* Member functions */
 
    const vcl::Color& color() const { return Base::data(); }
 
    vcl::Color& color() { return Base::data(); }
 
protected:
    // Component interface functions
    template<typename Element>
    void importFrom(const Element& e, bool = true);
 
    void serialize(std::ostream& os) const { color().serialize(os); }
 
    void deserialize(std::istream& is) { color().deserialize(is); }
};
 
/* concepts */
 
template<typename T>
concept HasColor = TB::IsDerivedFromSpecializationOfV<T, Color>;
 
template<typename T>
concept HasOptionalColor =
    HasColor<T> && IsOptionalComponent<typename RemoveRef<T>::Color>;
 
/* importFrom function */
 
template<typename ParentElemType, bool OPT>
template<typename Element>
void Color<ParentElemType, OPT>::importFrom(const Element& e, bool)
{
    if constexpr (HasColor<Element>) {
        if (isColorAvailableOn(e)) {
            color() = e.color();
        }
    }
}
 
/* Detector function to check if a class has Color available */
 
bool isColorAvailableOn(const auto& element)
{
    return isComponentAvailableOn<CompId::COLOR>(element);
}
 
} // namespace vcl::comp
 
#endif // VCL_MESH_COMPONENTS_COLOR_H