Viewports, Backends: Vulkan: Rebuild swapchain on VK_SUBOPTIMAL_KHR. (#3881)

backends/imgui_impl_vulkan.cpp

@@ -1619,7 +1619,7 @@ static void ImGui_ImplVulkan_SwapBuffers(ImGuiViewport* viewport, void*)
     info.pSwapchains = &wd->Swapchain;
     info.pImageIndices = &present_index;
     err = vkQueuePresentKHR(v->Queue, &info);
-    if (err == VK_ERROR_OUT_OF_DATE_KHR)
+    if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
         ImGui_ImplVulkanH_CreateOrResizeWindow(v->Instance, v->PhysicalDevice, v->Device, &data->Window, v->QueueFamily, v->Allocator, (int)viewport->Size.x, (int)viewport->Size.y, v->MinImageCount);
     else
         check_vk_result(err);