Subpass inputs are considered read-only

renderdoc/driver/shaders/spirv/spirv_reflect.cpp

@@ -962,7 +962,7 @@ void Reflector::MakeReflection(const GraphicsAPI sourceAPI, const ShaderStage st
             res.resType = TextureType::Texture2D;
 
           res.isTexture = res.resType != TextureType::Buffer;
-          res.isReadOnly = imageType.sampled != 2;
+          res.isReadOnly = imageType.sampled != 2 || imageType.dim == rdcspv::Dim::SubpassData;
 
           res.variableType.descriptor.type = imageType.retType.Type();