use addUsageFlags instead of 2 liners

Author: Erfan-Ahmadi

examples_tests/35.GeometryCreator/main.cpp

@@ -393,16 +393,14 @@ class GeometryCreatorSampleApp : public ApplicationBase
 				auto buf = geometryObject.bindings[i].buffer.get();
 				if (buf)
 				{
-					const auto newUsageFlags = buf->getUsageFlags() | asset::IBuffer::EUF_VERTEX_BUFFER_BIT;
-					buf->setUsageFlags(newUsageFlags);
+					buf->addUsageFlags(asset::IBuffer::EUF_VERTEX_BUFFER_BIT);
 					cpubuffers.push_back(buf);
 				}
 			}
 			auto cpuindexbuffer = geometryObject.indexBuffer.buffer.get();
 			if (cpuindexbuffer)
 			{
-				const auto newUsageFlags = cpuindexbuffer->getUsageFlags() | asset::IBuffer::EUF_INDEX_BUFFER_BIT;
-				cpuindexbuffer->setUsageFlags(newUsageFlags);
+				cpuindexbuffer->addUsageFlags(asset::IBuffer::EUF_INDEX_BUFFER_BIT);
 				cpubuffers.push_back(cpuindexbuffer);
 			}
 

src/nbl/asset/utils/CGeometryCreator.cpp

@@ -40,8 +40,7 @@ CGeometryCreator::return_type CGeometryCreator::createCubeMesh(const core::vecto
 	{
 		retval.indexCount = 36u;
 		auto indices = core::make_smart_refctd_ptr<asset::ICPUBuffer>(sizeof(uint16_t)*retval.indexCount);
-		const auto newUsageFlags = indices->getUsageFlags() | asset::IBuffer::EUF_INDEX_BUFFER_BIT;
-		indices->setUsageFlags(newUsageFlags);
+		indices->addUsageFlags(asset::IBuffer::EUF_INDEX_BUFFER_BIT);
 		auto u = reinterpret_cast<uint16_t*>(indices->getPointer());
 		for (uint32_t i=0u; i<6u; ++i)
 		{
@@ -57,8 +56,7 @@ CGeometryCreator::return_type CGeometryCreator::createCubeMesh(const core::vecto
 
 	// Create vertices
 	auto vertices = core::make_smart_refctd_ptr<asset::ICPUBuffer>(24u*vertexSize);
-	const auto newUsageFlags = vertices->getUsageFlags() | asset::IBuffer::EUF_VERTEX_BUFFER_BIT;
-	vertices->setUsageFlags(newUsageFlags);
+	vertices->addUsageFlags(asset::IBuffer::EUF_VERTEX_BUFFER_BIT);
 	CubeVertex* ptr = (CubeVertex*)vertices->getPointer();
 
 	const core::vector3d<int8_t> normals[6] =