image.hpp

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/*--------------------------------------------------------------*
  Copyright (C) 2021 Rudy Castan
 
  This file is distributed WITHOUT ANY WARRANTY. See the file
  `License.md' for details.
*--------------------------------------------------------------*/
#pragma once
 
#include <filesystem>
#include <memory>
 
namespace doodle
{
    struct Color;
 
    class [[nodiscard]] Image
    {
    public:
        static int MaxImageSize() noexcept;
 
    public:
        Image(int width, int height, bool smooth_it = false);
 
        explicit Image(const std::filesystem::path& file_path, bool smooth_it = false);
 
        Image();
 
        enum class FileType
        {
            PNG,
            BMP,
            TGA
        };
        void SaveToFile(const std::filesystem::path& file_path, FileType file_type = FileType::PNG) const;
        int GetWidth() const noexcept;
        int GetHeight() const noexcept;
        int GetNumberOfColors() const noexcept;
        bool IsSmooth() const noexcept;
 
        Color operator[](int index) const;
        Color& operator[](int index);
 
        Color operator()(int column, int row) const;
        Color& operator()(int column, int row);
 
        Color* begin();
        Color* end();
 
        const Color* begin() const;
        const Color* end() const;
 
    private:
        class ImageImpl;
        std::shared_ptr<ImageImpl> impl{};
 
    private:
        explicit Image(const std::shared_ptr<ImageImpl>& impl);
 
    private:
        friend void  draw_image(const Image& image, double x, double y) noexcept;
        friend void  draw_image(const Image& image, double x, double y, double width, double height) noexcept;
        friend void  draw_image(const Image& image, double x, double y, double width, double height) noexcept;
        friend void  draw_image(const Image& image, double x, double y, double width, double height, int texel_x,
                                int texel_y) noexcept;
        friend void  draw_image(const Image& image, double x, double y, double width, double height, int texel_x,
                                int texel_y, int texel_width, int texel_height) noexcept;
        friend Image end_drawing_to_image(bool smooth_texture);
    };
}