#ifdef GL_ES
precision mediump float;
#endif
uniform sampler2D tex, texuv;
varying vec2 tex_c, tex_cuv;
void main()
{
  float y,u,v,vmu,r,g,b;
  y=texture2D(tex,tex_c).r;
  u=texture2D(texuv,tex_cuv).g;
  v=texture2D(texuv,tex_cuv).a;

  u=u-0.5;
  v=v-0.5;
  vmu=v*0.813+u*0.391;
  u=u*2.018;
  v=v*1.596;
  y=(y-0.062)*1.164;

  r=y+v;
  g=y-vmu;
  b=y+u;

  gl_FragColor=vec4(r,g,b,1.0);
}