Bitmap.hpp

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#pragma once

#include <Gosu/Color.hpp>
#include <Gosu/IO.hpp>
#include <string>
#include <vector>

namespace Gosu
{
    class Bitmap
    {
        int m_width = 0, m_height = 0;
        std::vector<Color> m_pixels;

    public:
        Bitmap() = default;

        Bitmap(int width, int height, Color c = Color::NONE);

        int width() const
        {
            return m_width;
        }

        int height() const
        {
            return m_height;
        }

        void swap(Bitmap& other);

        void resize(int width, int height, Color c = Color::NONE);

        Color get_pixel(int x, int y) const
        {
            return m_pixels[y * m_width + x];
        }

        void set_pixel(int x, int y, Color c)
        {
            m_pixels[y * m_width + x] = c;
        }

        void blend_pixel(int x, int y, Color c);

        void insert(int x, int y, const Bitmap& source);

        void insert(int x, int y, const Bitmap& source,
                    int src_x, int src_y, int src_width, int src_height);

        const Color* data() const
        {
            return &m_pixels[0];
        }

        Color* data()
        {
            return &m_pixels[0];
        }

        #ifdef FRIEND_TEST
        FRIEND_TEST(BitmapTests, MemoryManagement);
        #endif
    };

    Bitmap load_image_file(const std::string& filename);
    Bitmap load_image_file(Reader input);

    void save_image_file(const Bitmap& bitmap, const std::string& filename);
    void save_image_file(const Bitmap& bitmap, Writer writer,
                         const std::string_view& format_hint = "png");

    void apply_color_key(Bitmap& bitmap, Color key);

    Bitmap apply_border_flags(unsigned image_flags, const Bitmap& source,
                              int src_x, int src_y, int src_width, int src_height);
}