/*
  ISHDRTonemapBlendCinematic
*/

#include "ReShade.fxh"

namespace Skyrim
{
	texture TextureAdaptationTex : HDR_DOWNSAMPLE4;
	texture myTextureColorTex : t1;
	texture TextureBloomTex : HDR_BLOOM;

	sampler TextureAdaptation { Texture = TextureAdaptationTex; };
	sampler myTextureColor { Texture = myTextureColorTex; };
	sampler TextureBloom { Texture = TextureBloomTex; };

	texture myTextureColorTexout : o0;
	//sampler TextureOut { Texture = myTextureColorTexout; };

uniform float4 Params01[6] < source = "Params01"; >;

}

#define LUM_709	float3(0.212500006,0.715399981,0.0720999986)
#define DELTA 9.99999975e-06

void PS_ISHDRTonemapBlendCinematic(in float4 position : SV_Position, in float2 texcoord : TEXCOORD, out float3 outcolor : SV_Target)
{
	float4 color = tex2D(Skyrim::myTextureColor, texcoord).rgba;
	// float3 bloom = tex2D(Skyrim::TextureBloom, texcoord).rgba;
	// float2 middlegray = tex2D(Skyrim::TextureAdaptation, texcoord).xy;

	// bool useFilmic = (0.5 < Skyrim::Params01[2].z);
	// float WhiteFactor = Skyrim::Params01[2].y;

	// float original_lum = max(dot(LUM_709, color.rgb), DELTA);
	// float lum_scaled = original_lum ;
	// float lum_filmic = max(lum_scaled - 0.004, 0.0);
	// lum_filmic = lum_filmic * (lum_filmic * 6.2 + 0.5) / (lum_filmic * (lum_filmic * 6.2 + 1.7) + 0.06);
	// lum_filmic = pow(lum_filmic, 2.2);     // de-gamma-correction for gamma-corrected tonemapper
	// lum_filmic = lum_filmic * WhiteFactor; // linear scale
	// float lum_reinhard = lum_scaled * (lum_scaled * WhiteFactor + 1.0) / (lum_scaled + 1.0);
	// float lum_mapped = useFilmic ? lum_filmic : lum_reinhard;
	// color.rgb = color.rgb * lum_mapped / original_lum;

	// //float bloomfactor = Skyrim::Params01[2].x;
	// //color.rgb = color.rgb + bloom.rgb * saturate(bloomfactor - lum_mapped);

	// float   saturation = Skyrim::Params01[3].x;    // 0 == gray scale
	// float   contrast = Skyrim::Params01[3].z;    // 0 == no contrast
	// float   brightness = Skyrim::Params01[3].w;    // intensity
	// float3  tint_color = Skyrim::Params01[4].rgb;  // tint color
	// float   tint_weight = Skyrim::Params01[4].w;    // 0 == no tint
	// color.a = dot(color.rgb, LUM_709);
	// color.rgb = lerp(color.a, color.rgb, saturation);
	// color.rgb = lerp(color.rgb, tint_color * color.a, tint_weight);
	// //color.rgb = lerp(middlegray.x, color.rgb * brightness, contrast);
	// color.rgb = saturate(color.rgb);
	// float3  fade = Skyrim::Params01[4].xyz;  // fade current scene to specified color, mostly used in special effects
	// float   fade_weight = Skyrim::Params01[4].w;    // 0 == no fade
	// color.rgb = lerp(color.rgb, fade, fade_weight);
//	color = saturate(color);
	// color = log2(color);
	// color = color * 1.5;
	// color = exp2(color);
//	color = pow(color, 1 /2.2);
	outcolor = color.rgb;

}

technique ISHDRTonemapBlendCinematic <
	ui_tooltip = "ISHDRTonemapBlendCinematic";
>

{
	pass
	{
		VertexShader = PostProcessVS;
		PixelShader = PS_ISHDRTonemapBlendCinematic;
		RenderTarget0 = Skyrim::myTextureColorTexout;
	}
}