Marty McFly Tonemaps ported to v3.x

/**
 * Haarm-Peter Duiker (HPD) Tonemap
 * Original by Marty McFly
 * Ported by XIIICaesar
 */

#include "ReShade.fxh"

float3 HaarmPeterDuikerPass(float4 position : SV_Position, float2 texcoord : TexCoord) : SV_Target
{
	float3 x = tex2D(ReShade::BackBuffer, texcoord).rgb;
	x = max((float3)0.0f, x - 0.004f);
    	return pow(abs((x * (6.2f * x + 0.5f)) / (x * (6.2f * x + 1.7f) + 0.06)), 2.2f);
}

technique HPD
{
	pass
	{
		VertexShader = PostProcessVS;
		PixelShader = HaarmPeterDuikerPass;
	}
}

/**
 * Filmic Curve (Unchartered 2) Tonemap
 * Original by Marty McFly
 * Ported by XIIICaesar
 */

#include "ReShade.fxh"

float3 FilmicCurvePass(float4 position : SV_Position, float2 texcoord : TexCoord) : SV_Target
{
	float3 color = tex2D(ReShade::BackBuffer, texcoord).rgb;
	
	float3 x = color.rgb;
	//float x = color;
	
	const float A = 0.665f;
	const float B = 0.09f;
	const float C = 0.004f;
	const float D = 0.445f;
	const float E = 0.26f;
	const float F = 0.025f;
	const float G = 0.16f;//0.145f;
	const float H = 1.1844f;//1.15f;

    // gamma space or not?
	return (((x*(A*x+B)+C)/(x*(D*x+E)+F))-G) / H;
	
	return color;
}

technique FilmicCurve
{
	pass
	{
		VertexShader = PostProcessVS;
		PixelShader = FilmicCurvePass;
	}
}