Explicitly ignore return values from Vulkan functions in RenderFrame

Because these functions can return statuses that aren't strictly an
error (and thus don't raise an exception), but might have to be handled,
they return a `vk::Result` that's `[[nodiscard]]`. Ideally some of the
result statuses would be handled here, but to get it to compile, cast
the result to void.

Author: vmedea

code/graphics/vulkan/RenderFrame.cpp

@@ -20,7 +20,9 @@ void RenderFrame::waitForFinish()
 		return;
 	}
 
-	m_device.waitForFences(m_frameInFlightFence.get(), true, std::numeric_limits<uint64_t>::max());
+	// waitForFences can theoretically return a timeout, but as this passes the maximum uint64_t value in microseconds,
+	// this won't happen in practice, and the result can be ignored.
+	(void)m_device.waitForFences(m_frameInFlightFence.get(), true, std::numeric_limits<uint64_t>::max());
 	m_device.resetFences(m_frameInFlightFence.get());
 
 	// That frame is now definitely not in flight anymore so we can call the functions that depend on that
@@ -41,11 +43,14 @@ uint32_t RenderFrame::acquireSwapchainImage()
 	Assertion(!m_inFlight, "Cannot acquire swapchain image when frame is still in flight.");
 
 	uint32_t imageIndex;
-	m_device.acquireNextImageKHR(m_swapChain,
+	vk::Result res = m_device.acquireNextImageKHR(m_swapChain,
 		std::numeric_limits<uint64_t>::max(),
 		m_imageAvailableSemaphore.get(),
 		nullptr,
 		&imageIndex);
+	// TODO: This should handle at least VK_SUBOPTIMAL_KHR, which means that the swap chain is no longer
+	// optimal and should be recreated.
+	(void)res;
 
 	m_swapChainIdx = imageIndex;
 
@@ -85,7 +90,10 @@ void RenderFrame::submitAndPresent(const std::vector<vk::CommandBuffer>& cmdBuff
 	presentInfo.pImageIndices = &m_swapChainIdx;
 	presentInfo.pResults = nullptr;
 
-	m_presentQueue.presentKHR(presentInfo);
+	vk::Result res = m_presentQueue.presentKHR(presentInfo);
+	// TODO: This should handle at least VK_SUBOPTIMAL_KHR, which means that the swap chain is no longer
+	// optimal and should be recreated.
+	(void)res;
 }
 
 } // namespace vulkan