Some changes to weaken MS-soft

Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>

include/vkcv/SwapChain.hpp

@@ -33,7 +33,7 @@ namespace vkcv {
          * @note The reference to our Swapchain variable is needed for the recreation step
          */
         [[nodiscard]]
-        vk::SwapchainKHR getSwapchain();
+        const vk::SwapchainKHR& getSwapchain() const;
 
         /**
          * gets the current surface object

src/vkcv/Core.cpp

@@ -343,7 +343,7 @@ namespace vkcv
 		m_Queues.graphicsQueue.submit(submitInfo);
 
 		vk::Result presentResult;
-		const vk::SwapchainKHR swapchain = m_swapchain.getSwapchain();
+		const vk::SwapchainKHR& swapchain = m_swapchain.getSwapchain();
 		const vk::PresentInfoKHR presentInfo(1, &m_SyncResources.renderFinished, 1, &swapchain, &swapchainImageIndex, &presentResult);
 		m_Queues.presentQueue.presentKHR(presentInfo);
 		if (presentResult != vk::Result::eSuccess) {

src/vkcv/SwapChain.cpp

@@ -6,7 +6,7 @@ namespace vkcv {
         : m_surface(surface), m_swapchain(swapchain), m_format( format), m_ImageCount(imageCount)
     {}
 
-    vk::SwapchainKHR SwapChain::getSwapchain() {
+    const vk::SwapchainKHR& SwapChain::getSwapchain() const {
         return m_swapchain;
     }