client/res_xseven/shaders/darkness_shader.fsh

#ifdef GL_ES
precision lowp float;
#endif

varying vec4 v_fragmentColor;
varying vec2 v_texCoord;

void main()
{
	vec4 c = texture2D(CC_Texture0, v_texCoord);  
    float greyNum = 0.45;  
    vec4 final = c;  
    final.r = c.r * greyNum;  
    final.g = c.g * greyNum;  
    final.b = c.b * greyNum;        
    gl_FragColor = final;
}