Constant buffer packing in MSVO

Author: Chman

PostProcessing/Runtime/Effects/MultiScaleVO.cs

@@ -467,8 +467,7 @@ void PushRenderCommands(PostProcessRenderContext context, CommandBuffer cmd, RTH
             cmd.SetComputeFloatParams(cs, "gInvThicknessTable", m_InvThicknessTable);
             cmd.SetComputeFloatParams(cs, "gSampleWeightTable", m_SampleWeightTable);
             cmd.SetComputeVectorParam(cs, "gInvSliceDimension", source.inverseDimensions);
-            cmd.SetComputeFloatParam(cs, "gRejectFadeoff", -1f / thicknessModifier);
-            cmd.SetComputeFloatParam(cs, "gIntensity", intensity);
+            cmd.SetComputeVectorParam(cs, "AdditionalParams", new Vector2(-1f / thicknessModifier, intensity));
             cmd.SetComputeTextureParam(cs, kernel, "DepthTex", source.id);
             cmd.SetComputeTextureParam(cs, kernel, "Occlusion", dest.id);
 
@@ -503,10 +502,7 @@ RTHandle dest
 
             cmd.SetComputeVectorParam(cs, "InvLowResolution", lowResDepth.inverseDimensions);
             cmd.SetComputeVectorParam(cs, "InvHighResolution", highResDepth.inverseDimensions);
-            cmd.SetComputeFloatParam(cs, "NoiseFilterStrength", noiseFilterWeight);
-            cmd.SetComputeFloatParam(cs, "StepSize", stepSize);
-            cmd.SetComputeFloatParam(cs, "kBlurTolerance", bTolerance);
-            cmd.SetComputeFloatParam(cs, "kUpsampleTolerance", uTolerance);
+            cmd.SetComputeVectorParam(cs, "AdditionalParams", new Vector4(noiseFilterWeight, stepSize, bTolerance, uTolerance));
 
             cmd.SetComputeTextureParam(cs, kernel, "LoResDB", lowResDepth.id);
             cmd.SetComputeTextureParam(cs, kernel, "HiResDB", highResDepth.id);

PostProcessing/Shaders/Builtins/MultiScaleVORender.compute

@@ -40,10 +40,12 @@ CBUFFER_START(CB1)
     float4 gInvThicknessTable[3];
     float4 gSampleWeightTable[3];
     float4 gInvSliceDimension;
-    float  gRejectFadeoff;
-    float  gIntensity;
+    float2 AdditionalParams;
 CBUFFER_END
 
+#define gRejectFadeoff AdditionalParams.x
+#define gIntensity AdditionalParams.y
+
 #if WIDE_SAMPLING
 // 32x32 cache size:  the 16x16 in the center forms the area of focus with the 8-pixel perimeter used for wide gathering.
 #define TILE_DIM 32

PostProcessing/Shaders/Builtins/MultiScaleVOUpsample.compute

@@ -41,12 +41,14 @@ RWTexture2D<float> AoResult;
 CBUFFER_START(CB1)
     float4 InvLowResolution;
     float4 InvHighResolution;
-    float NoiseFilterStrength;
-    float StepSize;
-    float kBlurTolerance;
-    float kUpsampleTolerance;
+    float4 AdditionalParams;
 CBUFFER_END
 
+#define NoiseFilterStrength AdditionalParams.x
+#define StepSize AdditionalParams.y
+#define kBlurTolerance AdditionalParams.z
+#define kUpsampleTolerance AdditionalParams.w
+
 groupshared float DepthCache[256];
 groupshared float AOCache1[256];
 groupshared float AOCache2[256];