#version 100

##

precision mediump float;

@@

varying vec2 vTexCoord;

%%

attribute vec2 aVertCoord;
attribute vec2 aTexCoord;

void main(void) {
	vTexCoord = aTexCoord;
	gl_Position = vec4(aVertCoord * vec2(1.0 / 256.0), 0.0, 1.0);
}

##

uniform sampler2D uTex;

void main(void) {
	if (texture2D(uTex, vTexCoord).r < 0.5) {
		discard;
	}
	gl_FragColor = vec4(1.0);
}