SAMPLER_BINDING(9) uniform sampler2D samp9;

out vec4 ocol0;
in vec2 uv0;

uniform vec4 resolution;

void main()
{

	//Changethis to increase the number of colors.
	int numColors =8;

	float4 to_gray = float4(0.3,0.59,0.11,0);
	float x1 = dot(to_gray, texture(samp9, uv0+vec2(1,1)*resolution.zw));
	float x0 = dot(to_gray, texture(samp9, uv0+vec2(-1,-1)*resolution.zw));
	float x3 = dot(to_gray, texture(samp9, uv0+vec2(1,-1)*resolution.zw));
	float x2 = dot(to_gray, texture(samp9, uv0+vec2(-1,1)*resolution.zw));
	float edge = (x1 - x0) * (x1 - x0) + (x3 - x2) * (x3 - x2);
	float4 color = texture(samp9, uv0).rgba;

	float4 c0 = color - float4(edge, edge, edge, edge) * 12.0;

	float red   = 0.0;
	float green = 0.0;
	float blue  = 0.0;
	bool rr = false;
	bool bb = false;
	bool gg = false;
	int count = 1;

	float colorN = 0.0;
	float colorB = 0.0;

	for (count = 1; count <= numColors; count++)
	{
		colorN = float(count / numColors);

		if ( c0.r <= colorN && c0.r >= colorB && rr == false )
		{
			if (count == 1)
			{
				if (colorN >= 0.1)
					red = 0.01;
				else
					red = colorN;
			}
			else if (count == numColors)
				red = 0.95;
			else
				red = colorN;

			 rr = true;
		}

		 if (c0.b <= colorN && c0.b >= colorB && bb == false)
		 {
			if (count == 1)
			{
				if (colorN >= 0.1)
					blue = 0.01;
				else
					blue = colorN;
			}
			else if (count == numColors)
				blue = 0.95;
			else
				blue = colorN ;
			
			bb = true;
		}

		if (c0.g <= colorN && c0.g >= colorB && gg == false)
		{
			if (count == 1)
			{
				if (colorN >= 0.1)
					green = 0.01;
				else
					green = colorN;
			}
			else if (count == numColors)
				green = 0.95;
			else
				green = colorN;
			gg = true;
		}

		colorB = float(count / numColors);

		if (rr == true && bb == true && gg == true)
			break;
	}

	ocol0 = float4(red, green, blue, c0.a);
}