void paint_pixel_white(struct Png *image, int x, int y, int width_pixel, int Red, int Green, int
Blue) {
    if (x < 0 || x >= image->width || y < 0 || y >= image->height)
        return;
    png_byte *row = image->row_pointers[y];
    png_byte *ptr = &(row[x * width_pixel]);
    if (!(ptr[0] == 255 && ptr[1] == 255 && ptr[2] == 255)) {
        ptr[0] = Red;
        ptr[1] = Green;
        ptr[2] = Blue;
    }
}

void white2(struct Png *image, int width_pixel, int thick, int r, int g, int b) {
    for (int y = 0; y < image->height; y++) {
        png_byte *row = image->row_pointers[y];
        for (int x = 0; x < image->width; x++) {
            png_byte *ptr = &(row[x * width_pixel]);
            if (ptr[0] == 255 && ptr[1] == 255 && ptr[2] == 255) {
                for (int y1 = y - thick; y1 < (1 + y + thick); y1++) {
                    for (int x1 = x - thick; x1 < (1 + x + thick); x1++) {
                        if ((x - x1) * (x - x1) + (y - y1) * (y - y1) <= (thick * thick)) {
                            paint_pixel_white(image, x1, y1, width_pixel, r, g, b);
                        }
                    }
                }
            }

        }
    }
}