#version 110

uniform sampler2D in_Texture;
uniform bool in_TextureEnabled;

varying vec4 var_Color;
varying vec2 var_TexCoord;

void main() {
  if (in_TextureEnabled)
    gl_FragColor = texture2D(in_Texture, var_TexCoord) * var_Color;
  else
    gl_FragColor = var_Color;

  float gray = dot(gl_FragColor.xyz, vec3(0.299, 0.587, 0.114));
  gl_FragColor = vec4(gray, gray, gray, 1.0);
}