Modifying the Shader Filters in FXAA Injector

[MShoap13]

I'd like to invert the Vignette Effect and then apply it to the presharpening pass without adding any color. Essentially leaving a blurred radius around the outer edges of the screen. Any tips on how I'd go about modifying the shaders to accomplish this?

 

I was figuring just adding the proper code to the start of the presharpening pass would be the simplest solution, however I'm a very novice scripter and I don't exactly know how I'd accomplish the inversion. Obviously I'd want to create my own variables regarding vignette sharpening, which I should be capable of.

 

In my setup I'm not even using the post sharpening as I find it's too strong and adds aliasing back into the final picture (I even toned it all the way down to 0.008). The presharpen is much more tunable and gives a much nicer final picture.

 

Here's the code for how the Vignette shader works:

 

float4 VignettePass( float4 colorInput, float2 tex )
{
float4 vignette = colorInput;
float2 tc = tex - VignetteCenter;
float v = length(tc) / VignetteRadius;
vignette += pow(v, 4) * VignetteAmount;

return vignette;
}

 

 

And the code for the Presharpen shader:

 

float4 SharpenPass( float2 tex ) 
{
// Recover the original pixels
float4 ori = tex2D(s0, tex);
// Gaussian filter
//   [ 1, 2 , 1 ]
//   [ 2, 4 , 2 ]
//   [ 1, 2 , 1 ]
float4 c1 = tex2D(s0, tex + float2(-dx,-dy));
float4 c2 = tex2D(s0, tex + float2(0,-dy));
float4 c3 = tex2D(s0, tex + float2(dx,-dy));
float4 c4 = tex2D(s0, tex + float2(-dx,0));
float4 c5 = tex2D(s0, tex + float2(dx,0));
float4 c6 = tex2D(s0, tex + float2(-dx,dy));
float4 c7 = tex2D(s0, tex + float2(0,dy));
float4 c8 = tex2D(s0, tex + float2(dx,dy));
//Normalize the values. Formula: 1 / (1+2+1+2+4+2+1+2+1) = 1 / 16 = .0625
float4 blur = (c1+c3+c6+c8 + 2*(c2+c4+c5+c7)+ 4*ori)*0.0625;
//Subtracting the blurred image from the original image
float4 cori = CoefOri*ori - CoefBlur*blur;
//For higher precision in the calculation of contour, requires slightly more processing power
//   [ c1, c2 , c3 ]
//   [ c4, ori , c5 ]
//   [ c6, c7 , c8 ]
if (highQualitySharpen == true)
{
	c1 = tex2D(s0, tex + float2(-px,-py));
	c2 = tex2D(s0, tex + float2(0,-py));
	c3 = tex2D(s0, tex + float2(px,-py));
	c4 = tex2D(s0, tex + float2(-px,0));
	c5 = tex2D(s0, tex + float2(px,0));
	c6 = tex2D(s0, tex + float2(-px,py));
	c7 = tex2D(s0, tex + float2(0,py));
	c8 = tex2D(s0, tex + float2(px,py));
}
else {}
// Horizontal gradient
//   [ -1, 0 ,1 ]
//   [ -2, 0, 2 ]
//   [ -1, 0 ,1 ]
float delta1 = (c3 + 2*c5 + c8)-(c1 + 2*c4 + c6);
// Vertical gradient
//   [ -1,- 2,-1 ]
//   [  0,  0, 0 ]
//   [  1,  2, 1 ]
float delta2 = (c6 + 2*c7 + c8)-(c1 + 2*c2 + c3);
// Calculate and sharpen the blurry edges
if (sqrt( mul(delta1,delta1) + mul(delta2,delta2)) > SharpenEdge) 
	{
		// Contour sharpening
		return ori*Sharpen_val0 - (c1 + c2 + c3 + c4 + c5 + c6 + c7 + c8 ) * Sharpen_val1;
	}
else 
	{
		// Return corrected image
		return cori;
	}
}

 

[MShoap13]

I played around with trying to accomplish this for a little bit last night, and I can say that this mod is very, very particular. However, I didn't even come close to achieving the effect I want. :wallbash:

[MShoap13]

meh...