texture_images.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * All rights reserved.                                                      *
 *                                                                           *
 * 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.                                       *
 *                                                                           *
 * 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_TEXTURE_IMAGES_H
#define VCL_MESH_COMPONENTS_TEXTURE_IMAGES_H
 
#include "base/component.h"
#include "concepts/textures.h"
 
#include <vclib/space/core.h>
#include <vclib/base.h>
 
#include <string>
#include <vector>
 
namespace vcl::comp {
 
namespace detail {
 
struct TData
{
    std::vector<Texture> textures;
    std::string          meshPath;
 
    auto paths()
    {
        return textures | std::views::transform([](Texture& t) -> std::string& {
                   return t.path();
               });
    }
 
    auto paths() const
    {
        return textures | std::views::transform(
                              [](const Texture& t) -> const std::string& {
                                  return t.path();
                              });
    }
 
    auto pathBegin() { return std::begin(paths()); }
 
    auto pathBegin() const { return std::begin(paths()); }
 
    auto pathEnd() { return std::end(paths()); }
 
    auto pathEnd() const { return std::end(paths()); }
};
 
} // namespace detail
 
class TextureImages :
        public Component<
            TextureImages,
            CompId::TEXTURE_IMAGES,
            detail::TData,
            void,
            false,
            false>
{
    using Base = Component<
        TextureImages,
        CompId::TEXTURE_IMAGES,
        detail::TData,
        void,
        false,
        false>;
 
public:
    using TextureType = Texture;
 
    // iterators
    using TextureIterator      = std::vector<Texture>::iterator;
    using ConstTextureIterator = std::vector<Texture>::const_iterator;
 
    using TexFileNamesIterator =
        decltype(std::declval<detail::TData>().pathBegin());
    using ConstTexFileNamesIterator =
        decltype(std::declval<const detail::TData>().pathBegin());
 
    /* Constructors */
 
    TextureImages() = default;
 
    /* Member functions */
 
    uint textureNumber() const { return texs().size(); }
 
    const Texture& texture(uint i) const { return texs()[i]; }
 
    Texture& texture(uint i) { return texs()[i]; }
 
    const std::string& texturePath(uint i) const { return texs()[i].path(); }
 
    std::string& texturePath(uint i) { return texs()[i].path(); }
 
    const std::string& meshBasePath() const { return Base::data().meshPath; }
 
    std::string& meshBasePath() { return Base::data().meshPath; }
 
    uint indexOfTexturePath(const std::string& path) const
    {
        auto it =
            std::find(Base::data().pathBegin(), Base::data().pathEnd(), path);
        if (it != Base::data().pathEnd()) {
            return static_cast<uint>(
                std::distance(Base::data().pathBegin(), it));
        }
        return UINT_NULL;
    }
 
    void clearTextures() { texs().clear(); }
 
    void clearTexturePaths() { clearTextures(); }
 
    void pushTexture(const Texture& texture) { texs().push_back(texture); }
 
    void pushTexturePath(const std::string& textPath)
    {
        texs().push_back(Texture());
        texs().back().path() = textPath;
    }
 
    TextureIterator textureBegin() { return texs().begin(); }
 
    TextureIterator textureEnd() { return texs().end(); }
 
    ConstTextureIterator textureBegin() const { return texs().begin(); }
 
    ConstTextureIterator textureEnd() const { return texs().end(); }
 
    TexFileNamesIterator texturePathBegin() { return Base::data().pathBegin(); }
 
    TexFileNamesIterator texturePathEnd() { return Base::data().pathEnd(); }
 
    ConstTexFileNamesIterator texturePathBegin() const
    {
        return Base::data().pathBegin();
    }
 
    ConstTexFileNamesIterator texturePathEnd() const
    {
        return Base::data().pathEnd();
    }
 
    View<TextureIterator> textures()
    {
        return View(textureBegin(), textureEnd());
    }
 
    View<ConstTextureIterator> textures() const
    {
        return View(textureBegin(), textureEnd());
    }
 
    auto texturePaths() { return Base::data().paths(); }
 
    auto texturePaths() const { return Base::data().paths(); }
 
protected:
    // Component interface functions
    template<typename Element>
    void importFrom(const Element& e, bool = true)
    {
        if constexpr (HasTextureImages<Element>) {
            texs()         = e.texs();
            meshBasePath() = e.meshBasePath();
        }
        else if constexpr (HasTexturePaths<Element>) {
            texs().clear();
            for (const auto& tpath : e.texturePaths()) {
                pushTexture(tpath);
            }
            meshBasePath() = e.meshBasePath();
        }
    }
 
    void serialize(std::ostream& os) const
    {
        vcl::serialize(os, texs());
        vcl::serialize(os, meshBasePath());
    }
 
    void deserialize(std::istream& is)
    {
        vcl::deserialize(is, texs());
        vcl::deserialize(is, meshBasePath());
    }
 
private:
    // members that allow to access the data
    std::vector<Texture>& texs() { return Base::data().textures; }
 
    const std::vector<Texture>& texs() const { return Base::data().textures; }
};
 
} // namespace vcl::comp
 
#endif // VCL_MESH_COMPONENTS_TEXTURE_IMAGES_H