Added multi-compile keywords for all fragment shaders, and added Metal workaround for texture atomics

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_common.cginc

@@ -2,3 +2,10 @@
 #pragma warning(disable: 3203)      // Signed/unsigned mismatch
 #pragma warning(disable: 3205)      // Conversion from larger type to smaller, possible loss of data
 #pragma warning(disable: 3556)      // Integer divides might be much slower, try using uints if possible
+
+// Work around the lack of texture atomics on Metal
+#if defined(SHADER_API_METAL)
+#define InterlockedAdd(dest, val, orig)     { (orig) = (dest); (dest) += (val); }
+#define InterlockedMin(dest, val)           { (dest) = min((dest), (val)); }
+#define InterlockedMax(dest, val)           { (dest) = max((dest), (val)); }
+#endif

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_fs.shader

@@ -13,6 +13,9 @@ Shader "TND/ASR/ffx_fsr2_fs"
             #pragma fragment main
             #pragma target 4.5
             //#pragma enable_d3d11_debug_symbols
+            
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
 
             #include "ffxm_fsr2_common.cginc"
             #include "shaders/ffxm_fsr2_vs.hlsl"
@@ -31,6 +34,13 @@ Shader "TND/ASR/ffx_fsr2_fs"
             #pragma target 4.5
             //#pragma enable_d3d11_debug_symbols
 
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ FFXM_FSR2_OPTION_HDR_COLOR_INPUT
+            #pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_INVERTED_DEPTH
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
             #include "ffxm_fsr2_common.cginc"
             #include "shaders/ffxm_fsr2_vs.hlsl"
             #include "shaders/ffxm_fsr2_reconstruct_previous_depth_pass_fs.hlsl"
@@ -48,6 +58,12 @@ Shader "TND/ASR/ffx_fsr2_fs"
             #pragma target 4.5
             //#pragma enable_d3d11_debug_symbols
 
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_INVERTED_DEPTH
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+            
             #include "ffxm_fsr2_common.cginc"
             #include "shaders/ffxm_fsr2_vs.hlsl"
             #include "shaders/ffxm_fsr2_depth_clip_pass_fs.hlsl"
@@ -65,6 +81,14 @@ Shader "TND/ASR/ffx_fsr2_fs"
             #pragma target 4.5
             //#pragma enable_d3d11_debug_symbols
 
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ FFXM_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE
+            #pragma multi_compile __ FFXM_FSR2_OPTION_HDR_COLOR_INPUT
+            #pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_APPLY_SHARPENING
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
             #include "ffxm_fsr2_common.cginc"
             #include "shaders/ffxm_fsr2_vs.hlsl"
             #include "shaders/ffxm_fsr2_accumulate_pass_fs.hlsl"
@@ -82,6 +106,8 @@ Shader "TND/ASR/ffx_fsr2_fs"
             #pragma target 4.5
             //#pragma enable_d3d11_debug_symbols
 
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
             #include "ffxm_fsr2_common.cginc"
             #include "shaders/ffxm_fsr2_vs.hlsl"
             #include "shaders/ffxm_fsr2_rcas_pass_fs.hlsl"