#extension GL_OES_EGL_image_external : require

precision mediump float;

uniform samplerExternalOES sTexture;
varying vec2 vTextureCoord;

void main(){
	gl_FragColor = texture2D(sTexture, vTextureCoord);
	float color = gl_FragColor.r*0.3 + gl_FragColor.g*0.59 + gl_FragColor.b*0.11;
	gl_FragColor = vec4(color,color,color,color);
}