Change BindlessPrototype to use an unbounded array

Gems/Atom/RPI/Assets/ShaderLib/Atom/RPI/ShaderResourceGroups/BindlessPrototypeSrg.azsli

@@ -31,10 +31,6 @@ ShaderResourceGroupSemantic FloatBufferSemanticId
 
 ShaderResourceGroup ImageSrg : FrequencyPerScene
 {
-    // Array of textures
-    // NOTE: The size of the texture array has to match the number of textures in the example
-    Texture2D m_textureArray[8];
-
     Sampler m_sampler
     {
         MaxAnisotropy = 16;
@@ -42,6 +38,9 @@ ShaderResourceGroup ImageSrg : FrequencyPerScene
         AddressV = Wrap;
         AddressW = Wrap;
     };
+
+    // Array of textures
+    Texture2D m_textureArray[];
 }
 
 ShaderResourceGroup FloatBufferSrg : FloatBufferSemanticId

Gems/Atom/RPI/Code/Include/Atom/RPI.Public/Shader/ShaderResourceGroup.h

@@ -75,6 +75,9 @@ namespace AZ
             RHI::ShaderInputSamplerIndex   FindShaderInputSamplerIndex(const Name& name) const;
             RHI::ShaderInputConstantIndex  FindShaderInputConstantIndex(const Name& name) const;
 
+            RHI::ShaderInputBufferUnboundedArrayIndex FindShaderInputBufferUnboundedArrayIndex(const Name& name) const;
+            RHI::ShaderInputImageUnboundedArrayIndex  FindShaderInputImageUnboundedArrayIndex(const Name& name) const;
+
             /// Returns the parent shader resource group asset.
             const Data::Asset<ShaderResourceGroupAsset>& GetAsset() const;
 

Gems/Atom/RPI/Code/Source/RPI.Public/Shader/ShaderResourceGroup.cpp

@@ -118,6 +118,16 @@ namespace AZ
             return m_layout->FindShaderInputConstantIndex(name);
         }
 
+        RHI::ShaderInputBufferUnboundedArrayIndex ShaderResourceGroup::FindShaderInputBufferUnboundedArrayIndex(const Name& name) const
+        {
+            return m_layout->FindShaderInputBufferUnboundedArrayIndex(name);
+        }
+
+        RHI::ShaderInputImageUnboundedArrayIndex  ShaderResourceGroup::FindShaderInputImageUnboundedArrayIndex(const Name& name) const
+        {
+            return m_layout->FindShaderInputImageUnboundedArrayIndex(name);
+        }
+
         const Data::Asset<ShaderResourceGroupAsset>& ShaderResourceGroup::GetAsset() const
         {
             return m_asset;