Blur.fx

namespace ShoterXX
{

	static const uint2 vertexID = uint2(2,1);

	#define fetchAt(COORDS) tex2Dlod(ReShade::BackBuffer, float4(COORDS, 0, 0))

	#define CreateLQTextureLOD(NAME, x, y, lod)\
	\
	texture2D NAME##Tex\
	{\
		Width = ##x;\
		Height = ##y;\
		Format = RGBA8;\
		MipLevels = lod;\
	};\
	\
	sampler2D NAME\
	{\
		Texture = NAME##Tex;\
	};

	#define DoBlurPassOdd(i) \
	pass \
	{ \
		VertexShader = ShoterXX::VS_PI_BLUR##i; \
		PixelShader = ShoterXX::PS_PI_BlurPush##i; \
		RenderTarget = ShoterXX::PI_Blur2Tex; \
	}

	#define DoBlurPassEven(i) \
	pass \
	{ \
		VertexShader = ShoterXX::VS_PI_BLUR##i; \
		PixelShader = ShoterXX::PS_PI_BlurPull##i; \
		RenderTarget = ShoterXX::PI_BlurTex; \
	}

	#define CreateBlurVertex(i)\
	\
	void VS_PI_BLUR##i(in uint id : SV_VertexID, out float4 position : SV_Position, out float2 xy : TEXCOORD, out float4x4 fetchMatrix : TEXCOORD1)\
	{\
		xy = (id == vertexID) ? 2.0 : 0.0;\
		position = float4(xy * float2(2.0, -2.0) + float2(-1.0, 1.0), 0.0, 1);\
		\
		float2 pixOffset = ReShade::PixelSize * (i*i + 0.5) * ppB.y;\
		\
		pixOffset.y *= ((ppB.x + i) % 2) ? -1 : 1;\
		\
		fetchMatrix._11_12_13_14 = float4(xy,											0, 0);\
		fetchMatrix._21_22_23_24 = float4(xy + float2( 0.00000000000, 1.0) * pixOffset, 0, 2);\
		fetchMatrix._31_32_33_34 = float4(xy + float2( 0.86602540378, 0.5) * pixOffset, 0, 2);\
		fetchMatrix._41_42_43_44 = float4(xy + float2(-0.86602540378, 0.5) * pixOffset, 0, 2);\
	}

	#define CreateBlurPassOdd(i)\
	\
	CreateBlurVertex(i)\
	\
	void PS_PI_BlurPush##i(in float4 vpos : SV_Position, in float2 xy : TEXCOORD, in float4x4 fetchMatrix : TEXCOORD1, out float4 put : SV_Target0)\
	{\
		DoBlur(i, PI_Blur, xy, put, fetchMatrix);\
	}

	#define CreateBlurPassEven(i)\
	\
	CreateBlurVertex(i)\
	\
	void PS_PI_BlurPull##i(in float4 vpos : SV_Position, in float2 xy : TEXCOORD, in float4x4 fetchMatrix : TEXCOORD1, out float4 put : SV_Target0)\
	{\
		DoBlur(i, PI_Blur2, xy, put, fetchMatrix);\
	}



	CreateLQTextureLOD(PI_Blur , BUFFER_WIDTH/1.999, BUFFER_HEIGHT/2.002, 3);
	CreateLQTextureLOD(PI_Blur2, BUFFER_WIDTH/2.001, BUFFER_HEIGHT/1.998, 3);



	uniform float2 ppB < source = "pingpong"; min = 0; max = 1; step = 100; >;

	void DoBlur(in int i, in sampler2D tex, in float2 xy, out float4 put, in float4x4 fetchMatrix)
	{
		int j;

		[unroll]
		for(j = 0; j<4; j++)
			fetchMatrix[j] = tex2Dlod(tex, fetchMatrix[j]);

		fetchMatrix._14 = 1 - dot(fetchMatrix._24_34_44 = saturate(1 - abs((put.w = fetchMatrix._14) - fetchMatrix._24_34_44) * 64)/3, 1);

		[unroll]
		for(j = 0; j<4; j++)
			fetchMatrix[j].rgb = pow(fetchMatrix[j].rgb, 8) * fetchMatrix[j].a;

		put.rgb = pow((fetchMatrix._11_12_13 + fetchMatrix._21_22_23) + (fetchMatrix._31_32_33 + fetchMatrix._41_42_43), rcp(8));
	}

	void DoBlurNP(in int i, in sampler2D tex, in float2 xy, out float4 put, in float4x4 fetchMatrix)
	{
		int j;

		[unroll]
		for(j = 0; j<4; j++)
			fetchMatrix[j] = tex2Dlod(tex, fetchMatrix[j]);

		fetchMatrix._14 = 1 - dot(fetchMatrix._24_34_44 = saturate(1 - abs((put.w = fetchMatrix._14) - fetchMatrix._24_34_44) * 64)/3, 1);

		[unroll]
		for(j = 0; j<4; j++)
			fetchMatrix[j].rgb = pow(fetchMatrix[j].rgb, 8) * fetchMatrix[j].a;

		put.rgb = (fetchMatrix._11_12_13 + fetchMatrix._21_22_23) + (fetchMatrix._31_32_33 + fetchMatrix._41_42_43);
	}

	void PS_PI_BlurGet(in float4 vpos : SV_Position, in float2 xy : TEXCOORD, in float4x4 fetchMatrix : TEXCOORD1, out float4 put : SV_Target0)
	{
		float4 curP;

		DoBlurNP(6, PI_Blur, xy, curP, fetchMatrix);

		float2 pixOffset = xy + ReShade::PixelSize * 0.5;

		put = fetchAt(pixOffset);

		put = pow(curP * 0.750 + put * put * 0.250, rcp(8));

		put.a = ReShade::GetLinearizedDepth(pixOffset);
	}

	CreateBlurPassOdd(0)
	CreateBlurPassEven(1)
	CreateBlurPassOdd(2)
	CreateBlurPassEven(3)
	CreateBlurPassOdd(4)
	CreateBlurPassEven(5)
	CreateBlurPassOdd(6)

}