{
        name: "shadow",
        new: true,
        vertex: "
            //boiler plate vertex shader. Probably doesn't need modification.
            //The fragment shader is where the fun is.
            uniform mat4 u_anura_mvp_matrix;
            attribute vec2 a_anura_vertex;
            attribute vec2 a_anura_texcoord;
            varying vec2 v_texcoord;
            varying vec2 v_vertex;
            void main()
            {
                v_vertex = a_anura_vertex;
                gl_Position = u_anura_mvp_matrix * vec4(a_anura_vertex, 0.0, 1.0);
                v_texcoord = a_anura_texcoord;
            }
        ",


        fragment: "
            #version 120
            uniform sampler2D u_anura_tex_map;
            uniform float u_shadow_opacity;
            uniform float u_shadow_red;
            uniform float u_shadow_green;
            uniform float u_shadow_blue;
            varying vec2 v_texcoord;
            varying vec2 v_vertex;

            void main() {
                vec4 fb_color = texture2D(u_anura_tex_map,v_texcoord); //Get a pixel of the active layer.
                gl_FragColor = fb_color;
            }
        ",
    }