$input v_color0, v_texcoord0 #include SAMPLER2D(s_textureSampler, 0); uniform float u_compose_alpha; uniform float u_compose_mult; void main() { gl_FragColor = texture2D(s_textureSampler, v_texcoord0.xy) * vec4(u_compose_mult, u_compose_mult, u_compose_mult, u_compose_alpha*u_compose_mult); }