Access Previous Frame

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1 month 6 days ago - 1 month 6 days ago #1 by JohnnyFlash
Access Previous Frame was created by JohnnyFlash
I spent the day looking and only found a thread from 6 years ago.  Is the below still the best practice for accessing the previous frame?
texture2D currTex : COLOR;
texture2D prevTex { Width = BUFFER_WIDTH; Height = BUFFER_HEIGHT; };
sampler2D currColor { Texture = currTex; };
sampler2D prevColor { Texture = prevTex; };

float4 PS_PostProcess(float4 vpos : SV_Position, float2 texcoord : TEXCOORD) : SV_Target
{
	float4 curr = tex2D(currColor, texcoord);
	float4 prev = tex2D(prevColor, texcoord);
	
	....

	return curr;
}
float4 PS_CopyFrame(float4 vpos : SV_Position, float2 texcoord : TEXCOORD) : SV_Target
{
	return tex2D(currColor, texcoord);
}

technique MyTechnique
{
	pass DoPostProcessing
	{
		VertexShader = ...;
		PixelShader = PS_PostProcess;
	}
	pass DoCopyFrameForPrevAccess
	{
		VertexShader = ...;
		PixelShader = PS_CopyFrame;
		RenderTarget = prevTex;
	}
}
Last edit: 1 month 6 days ago by JohnnyFlash.

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