single_channel_es.frag

#version 100

#ifdef GL_ES
# ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
# else
precision mediump float;
#endif
precision mediump int;
precision lowp sampler2D;
#endif

uniform vec4 color;

uniform sampler2D tex;
varying vec2 fragTexCoord;

void main()
{
    gl_FragColor = vec4(color.r, color.g, color.b, texture2D(tex, fragTexCoord).r*color.a);
}