Implement ICPUImage::valid()

Author: kevyuu

include/nbl/asset/ICPUImage.h

@@ -195,6 +195,16 @@ class NBL_API2 ICPUImage final : public IImage, public IPreHashed
 			return true;
 		}
 
+	  inline virtual bool valid() const override
+		{
+			if (!validateCreationParameters(m_creationParams)) return false;
+			if (info != m_creationParams.format) return false;
+			if (!buffer->valid()) return false;
+			for (const auto& region : regions)
+				if (!region.isValid()) return false;
+			return true;
+		}
+
     protected:
 		inline ICPUImage(const SCreationParams& _params) : IImage(_params) {}
 		virtual ~ICPUImage() = default;