Adjust input attachment index when indexing into array of input descriptors

src/Pipeline/SpirvShader.cpp

@@ -714,7 +714,7 @@ namespace sw
 					if (opcode == spv::OpAccessChain || opcode == spv::OpInBoundsAccessChain)
 					{
 						Decorations dd{};
-						ApplyDecorationsForAccessChain(&dd, pointerId, insn.wordCount() - 4, insn.wordPointer(4));
+						ApplyDecorationsForAccessChain(&dd, &descriptorDecorations[resultId], pointerId, insn.wordCount() - 4, insn.wordPointer(4));
 						// Note: offset is the one thing that does *not* propagate, as the access chain accounts for it.
 						dd.HasOffset = false;
 						decorations[resultId].Apply(dd);
@@ -1343,7 +1343,7 @@ namespace sw
 		}
 	}
 
-	void SpirvShader::ApplyDecorationsForAccessChain(Decorations *d, Object::ID baseId, uint32_t numIndexes, uint32_t const *indexIds) const
+	void SpirvShader::ApplyDecorationsForAccessChain(Decorations *d, DescriptorDecorations *dd, Object::ID baseId, uint32_t numIndexes, uint32_t const *indexIds) const
 	{
 		ApplyDecorationsForId(d, baseId);
 		auto &baseObject = getObject(baseId);
@@ -1365,6 +1365,12 @@ namespace sw
 			}
 			case spv::OpTypeArray:
 			case spv::OpTypeRuntimeArray:
+				if (dd->InputAttachmentIndex >= 0)
+				{
+					dd->InputAttachmentIndex += GetConstantInt(indexIds[i]);
+				}
+				typeId = type.element;
+				break;
 			case spv::OpTypeVector:
 				typeId = type.element;
 				break;

src/Pipeline/SpirvShader.hpp

@@ -656,7 +656,7 @@ namespace sw
 		uint32_t ComputeTypeSize(InsnIterator insn);
 		void ApplyDecorationsForId(Decorations *d, TypeOrObjectID id) const;
 		void ApplyDecorationsForIdMember(Decorations *d, Type::ID id, uint32_t member) const;
-		void ApplyDecorationsForAccessChain(Decorations *d, Object::ID baseId, uint32_t numIndexes, uint32_t const *indexIds) const;
+		void ApplyDecorationsForAccessChain(Decorations *d, DescriptorDecorations *dd, Object::ID baseId, uint32_t numIndexes, uint32_t const *indexIds) const;
 
 		// Creates an Object for the instruction's result in 'defs'.
 		void DefineResult(const InsnIterator &insn);