FSR2Context.executeData

Description

The mutable execution parameters used by FSR2 for each frame.

Modify this data before invoking GraphicsDevice.ExecuteFSR2 to control frame-specific behavior such as jitter, motion vector scale, sharpness, and camera properties.

Additional resources: FSR2CommandExecutionData.

using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.HighDefinition;
using UnityEngine.Experimental.Rendering;
using UnityEngine.AMD;

// Example HDRP custom pass 
public class CustomFSRPass : CustomPass
{
    void InitializeAMDDevice()
    {
        // device initialization code
    }
    bool HasOutputResolutionChanged(CustomPassContext ctx) 
    { 
        // detect resolution change
    }
    bool HasInputResolutionChanged(CustomPassContext ctx) 
    { 
        // detect resolution change
    }

    protected override void Setup(ScriptableRenderContext renderContext, CommandBuffer cmd)
    {
        // setup code
    }

    protected override void Execute(CustomPassContext ctx)
    {
        bool initializeFsr2Context = fsr2Context == null || HasInputResolutionChanged(ctx) || HasOutputResolutionChanged(ctx);
        if (initializeFsr2Context)
        {
            // fsr2Context initialization code
        }

        Vector2Int mvSize = ctx.cameraMotionVectorsBuffer.GetScaledSize();
        m_InputTextureSize = ctx.cameraColorBuffer.GetScaledSize();

        fsr2Context.executeData.enableSharpening = m_EnableSharpening ? 1 : 0;
        fsr2Context.executeData.sharpness = m_Sharpness;
        fsr2Context.executeData.renderSizeWidth = (uint)m_InputTextureSize.x;
        fsr2Context.executeData.renderSizeHeight = (uint)m_InputTextureSize.y;
        fsr2Context.executeData.jitterOffsetX = -ctx.hdCamera.taaJitter.x;
        fsr2Context.executeData.jitterOffsetY = -ctx.hdCamera.taaJitter.y;
        fsr2Context.executeData.preExposure = 1.0f;
        fsr2Context.executeData.frameTimeDelta = Time.deltaTime * 1000.0f; // FSR2 expects time in milliseconds
        fsr2Context.executeData.cameraNear = ctx.hdCamera.camera.nearClipPlane;
        fsr2Context.executeData.cameraFar = ctx.hdCamera.camera.farClipPlane;
        fsr2Context.executeData.cameraFovAngleVertical = ctx.hdCamera.camera.fieldOfView * (Mathf.PI * 2.0f/360.0f); // FSR2 expects in radians

        // Unity computes motion vectors in NDC, FSR2 expects them in screen space and from current frame to previous frame.
        // Here we scale by the render target size to meet the FSR2 requirements,
        // and also invert them to satisfy the frame of reference requirement.
        fsr2Context.executeData.MVScaleX = -((float)mvSize.x); 
        fsr2Context.executeData.MVScaleY = -((float)mvSize.y); 

#if UNITY_EDITOR
        // The same camera is used to render both Scene and Play mode views within the editor.
        // In case both of these views are visible at the same time, we'll need to reset to avoid
        // rendering artifacts.
        fsr2Context.executeData.reset = 1;
#else
        fsr2Context.executeData.reset = (initializeFsr2Context || parameters.hdCamera.isFirstFrame) ? 1 : 0;
#endif


        FSR2TextureTable fsr2TextureTable = new FSR2TextureTable()
        {
             // setup texture table for FSR2 inputs/outputs
        };

        amdDevice.ExecuteFSR2(ctx.cmd, fsr2Context, fsr2TextureTable);
    }

    protected override void Cleanup()
    {
        // cleanup code
    }

    private GraphicsDevice amdDevice = null;
    private FSR2Context fsr2Context = null;

    [SerializeField] public float m_Sharpness = 0.92f;
    [SerializeField] public bool m_EnableSharpening = true;
    
    Vector2Int m_InputTextureSize = new Vector2Int(0,0);
}