Minor optimization: use half float types wherever the original GLSL code uses mediump floats.

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/2_pass_cs/sgsr2_convert.compute

@@ -12,7 +12,7 @@
 TEXTURE2D_X(InputColor)                             : register(t0);
 TYPED_TEXTURE2D_X(float, InputDepth)                : register(t1);
 TYPED_TEXTURE2D_X(float2, InputVelocity)            : register(t2);
-RW_TEXTURE2D_X(float4, MotionDepthClipAlphaBuffer)  : register(u0);
+RW_TEXTURE2D_X(half4, MotionDepthClipAlphaBuffer)   : register(u0);
 RW_TEXTURE2D_X(uint, YCoCgColor)                    : register(u1);
 
 CBUFFER_START(Params)
@@ -36,7 +36,7 @@ void CS(uint3 gl_GlobalInvocationID : SV_DispatchThreadID)
 {
     UNITY_XR_ASSIGN_VIEW_INDEX(gl_GlobalInvocationID.z);
     
-    float Exposure_co_rcp = preExposure;
+    half Exposure_co_rcp = preExposure;
     float2 ViewportSizeInverse = displaySizeRcp.xy;
     uint2 InputPos = gl_GlobalInvocationID.xy;
 
@@ -102,7 +102,7 @@ void CS(uint3 gl_GlobalInvocationID : SV_DispatchThreadID)
     }
 
     ////////////compute luma
-    float3 Colorrgb = LOAD_TEXTURE2D_X(InputColor, InputPos).xyz;
+    half3 Colorrgb = LOAD_TEXTURE2D_X(InputColor, InputPos).xyz;
 
     ///simple tonemap
     float ColorMax = max(max(Colorrgb.x, Colorrgb.y), Colorrgb.z) + Exposure_co_rcp;
@@ -120,6 +120,6 @@ void CS(uint3 gl_GlobalInvocationID : SV_DispatchThreadID)
 
     YCoCgColor[COORD_TEXTURE2D_X(InputPos)] = ((x11 << 21u) | (y11 << 10u)) | z10;
 
-    float4 v29 = float4(motion, depthclip, ColorMax);
+    half4 v29 = half4(motion, depthclip, ColorMax);
     MotionDepthClipAlphaBuffer[COORD_TEXTURE2D_X(InputPos)] = v29;
 }

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/2_pass_cs/sgsr2_upscale.compute

@@ -33,8 +33,8 @@ float3 DecodeColor(uint sample32)
 TEXTURE2D_X(PrevHistoryOutput)              : register(t0);
 TEXTURE2D_X(MotionDepthClipAlphaBuffer)     : register(t1);
 TYPED_TEXTURE2D_X(uint, YCoCgColor)         : register(t2);
-RW_TEXTURE2D_X(float4, SceneColorOutput)    : register(u0);
-RW_TEXTURE2D_X(float4, HistoryOutput)       : register(u1);
+RW_TEXTURE2D_X(half4, SceneColorOutput)     : register(u0);
+RW_TEXTURE2D_X(half4, HistoryOutput)        : register(u1);
 
 CBUFFER_START(Params)
     uint2                renderSize;

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/3_pass_cs/sgsr2_activate.compute

@@ -29,9 +29,9 @@ float2 unpackHalf2x16(uint x)
 }
 
 TYPED_TEXTURE2D_X(uint, PrevLumaHistory)            : register(t0);
-TEXTURE2D_X(MotionDepthAlphaBuffer)                 : register(t1);
+TYPED_TEXTURE2D_X(half4, MotionDepthAlphaBuffer)    : register(t1);
 TYPED_TEXTURE2D_X(uint, YCoCgColor)                 : register(t2);
-RW_TEXTURE2D_X(float4, MotionDepthClipAlphaBuffer)  : register(u0);
+RW_TEXTURE2D_X(half4, MotionDepthClipAlphaBuffer)   : register(u0);
 RW_TEXTURE2D_X(uint, LumaHistory)                   : register(u1);
 
 CBUFFER_START(Params)

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/3_pass_cs/sgsr2_convert.compute

@@ -13,7 +13,7 @@ TEXTURE2D_X(InputOpaqueColor)                   : register(t0);
 TEXTURE2D_X(InputColor)                         : register(t1);
 TYPED_TEXTURE2D_X(float, InputDepth)            : register(t2);
 TYPED_TEXTURE2D_X(float2, InputVelocity)        : register(t3);
-RW_TEXTURE2D_X(float4, MotionDepthAlphaBuffer)  : register(u0);
+RW_TEXTURE2D_X(half4, MotionDepthAlphaBuffer)   : register(u0);
 RW_TEXTURE2D_X(uint, YCoCgColor)                : register(u1);
 
 CBUFFER_START(Params)
@@ -91,7 +91,7 @@ void CS(uint3 gl_GlobalInvocationID : SV_DispatchThreadID)
     }
 
     ////////////compute luma
-    float3 Colorrgb = LOAD_TEXTURE2D_X(InputColor, InputPos).xyz;
+    half3 Colorrgb = LOAD_TEXTURE2D_X(InputColor, InputPos).xyz;
 
     ///simple tonemap
     Colorrgb /= max(max(Colorrgb.x, Colorrgb.y), Colorrgb.z) + h0;
@@ -106,14 +106,14 @@ void CS(uint3 gl_GlobalInvocationID : SV_DispatchThreadID)
     uint y11 = uint(Colorycocg.y * 2047.5);
     uint z10 = uint(Colorycocg.z * 1023.5);
 
-    float3 Colorprergb = LOAD_TEXTURE2D_X(InputOpaqueColor, InputPos).xyz;
+    half3 Colorprergb = LOAD_TEXTURE2D_X(InputOpaqueColor, InputPos).xyz;
 
     ///simple tonemap
     Colorprergb /= max(max(Colorprergb.x, Colorprergb.y), Colorprergb.z) + h0;
-    float3 delta = abs(Colorrgb - Colorprergb);
-    float alpha_mask = max(delta.x, max(delta.y, delta.z));
+    half3 delta = abs(Colorrgb - Colorprergb);
+    half alpha_mask = max(delta.x, max(delta.y, delta.z));
     alpha_mask = (0.35f * 1000.0f) * alpha_mask;
 
     YCoCgColor[COORD_TEXTURE2D_X(InputPos)] = ((x11 << 21u) | (y11 << 10u)) | z10;
-    MotionDepthAlphaBuffer[COORD_TEXTURE2D_X(InputPos)] = float4(motion, NearestZ, alpha_mask);
+    MotionDepthAlphaBuffer[COORD_TEXTURE2D_X(InputPos)] = half4(motion, NearestZ, alpha_mask);
 }

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/3_pass_cs/sgsr2_upscale.compute

@@ -33,8 +33,8 @@ float3 DecodeColor(uint sample32)
 TEXTURE2D_X(PrevHistoryOutput)              : register(t0);
 TEXTURE2D_X(MotionDepthClipAlphaBuffer)     : register(t1);
 TYPED_TEXTURE2D_X(uint, YCoCgColor)         : register(t2);
-RW_TEXTURE2D_X(float4, SceneColorOutput)    : register(u0);
-RW_TEXTURE2D_X(float4, HistoryOutput)       : register(u1);
+RW_TEXTURE2D_X(half4, SceneColorOutput)     : register(u0);
+RW_TEXTURE2D_X(half4, HistoryOutput)        : register(u1);
 
 CBUFFER_START(Params)
     uint2                renderSize;