// Gaussian Blur PixelShader 3.0
// By Torsten Simon - © 2010

// Accepts incomming:
// skill1 - strength (0 ... 10)
// mat_name.skill1=floatv(0...10);

#define USE_STATIC_VALUES true
// Remove/Comment this line to use material.Skill2...Skill5 for the values below
#define WIDTH 8
// WIDTH in Pixels to distribute the blur, lower values -> faster rendering
#define WIDTH_SKIP 2
// "Jump" Pixels when blurring, higher values -> faster rendering
#define RADIUS 7
// Radius when blurring, higher values -> faster rendering
#define GLOW 0
// Min: 0, Max: 100, Applying a glowing blur effect


// Please Read:
// This shader uses PS_3_0, but if you use the fast, simple blur-parameters
// you can also use PS_2_0. Therefore, change line 123 to
//	PixelShader = compile ps_2_0 postprocessing_gaussian(); 

/* Some Examples to try

// Default (Small, Smooth)
#define WIDTH 8
#define WIDTH_SKIP 2
#define RADIUS 7

// Fast, Simple Blur (Works with PS_2_0 as well!)
#define WIDTH 8
#define WIDTH_SKIP 4
#define RADIUS 45

// Wide Range
#define WIDTH 30
#define WIDTH_SKIP 8
#define RADIUS 10

// Medium Range
#define WIDTH 20
#define WIDTH_SKIP 8
#define RADIUS 15

*/


#include <define>

float4 vecSkill1;
// Min: 0, Max:10

float4 vecSkill5;

Texture TargetMap;
sampler2D g_samSrcColor = sampler_state { texture = <TargetMap>; MipFilter = Linear;	};

float4 vecViewPort;

#define RENDER vecSkill1.x>0

float4 postprocessing_gaussian(float2 Tex : TEXCOORD0) : COLOR0 
{   
	float4 ret=tex2D(g_samSrcColor, Tex.xy);
	#ifdef RENDER
	
	int width,width_skip,radius,glow;
	
	#ifdef USE_STATIC_VALUES
	width=WIDTH;
	width_skip=WIDTH_SKIP;
	radius=RADIUS;
	glow=GLOW;
	#else
	width=vecSkill1.y;
	width_skip=max(vecSkill1.z,1);
	if(width<width_skip) width=width_skip;
	else width+=width%width_skip;
	radius=max(vecSkill1.w,1);
	glow=vecSkill5.x;
	#endif
	
	// Real sample	
   float4 sampleM  = tex2D(g_samSrcColor, Tex.xy);
   
	// Brightness calculation script
	float fac=(vecSkill1.x)*float(float(((float)width_skip/(float)width)/float(360/radius))/10)*((glow+50)/50.f);
	
	float s=(10-vecSkill1.x)*.1+fac;

	ret=s*sampleM; // return variable
	int i=0;
	int dist=width_skip;

	while(dist<=width)
	{
	float4 pos1;
	float round=radians(i);
	pos1.x=Tex.x+sin(round)*vecViewPort.z*dist;
	pos1.y=Tex.y+cos(round)*vecViewPort.w*dist;
	pos1.z=0;
	pos1.w=0;
	float4 S1=tex2Dlod(g_samSrcColor,pos1);
	ret+=fac*(S1);
	i+=radius;
	if(i>=360) {
		dist+=width_skip;
		i=0;
	}
	}
	#endif
	return ret;
}

technique PostProcess 
{
	pass p1 
	{
		AlphaBlendEnable = false;	
		VertexShader = null;
		PixelShader = compile ps_3_0 postprocessing_gaussian();
	}
}