RGBA Image

[Mikez2015]

Hello. I try draw circle to RGBA Image:

        cimg_library::CImg<unsigned char> src(pixels, 4096, 4096, 1, 4, true);
    const unsigned char color_Green[] = { 0,255,0 };
    src.fill(75);
    src.draw_circle(2048, 2048, 4096/4, color_Green);