#ifdef GL_ES
precision mediump int;
precision mediump float;
#endif

#define USE_OGRE_FROM_FUTURE
#include <OgreUnifiedShader.h>

SAMPLER2D(RT, 0);

MAIN_PARAMETERS
IN(vec2 oUv0, TEXCOORD0)
MAIN_DECLARATION
{
  float nColors = 8.0;
	float gamma = 0.6;

	vec4 texCol = texture2D(RT, oUv0);
	vec3 tc = texCol.xyz;
	tc = pow(tc, vec3_splat(gamma));
	tc = tc * vec3_splat(nColors);
	tc = floor(tc);
	tc = tc / vec3_splat(nColors);
	tc = pow(tc, vec3_splat(1.0/gamma));
	gl_FragColor = vec4(tc, texCol.w);
}