#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif

varying vec2 v_texcoord;
uniform sampler2D tex;
uniform float alpha;
uniform mat4 color_matrix;

void main() {
	gl_FragColor = color_matrix * vec4(texture2D(tex, v_texcoord).rgb, 1.0) * alpha;
}