Rework semaphores for presentation to be created per swap chain image to fix validation error.

drivers/vulkan/rendering_device_driver_vulkan.cpp

@@ -2683,8 +2683,10 @@ Error RenderingDeviceDriverVulkan::command_queue_execute_and_present(CommandQueu
 
 	if (p_cmd_buffers.size() > 0) {
 		thread_local LocalVector<VkCommandBuffer> command_buffers;
+		thread_local LocalVector<VkSemaphore> present_semaphores;
 		thread_local LocalVector<VkSemaphore> signal_semaphores;
 		command_buffers.clear();
+		present_semaphores.clear();
 		signal_semaphores.clear();
 
 		for (uint32_t i = 0; i < p_cmd_buffers.size(); i++) {
@@ -2696,27 +2698,11 @@ Error RenderingDeviceDriverVulkan::command_queue_execute_and_present(CommandQueu
 			signal_semaphores.push_back(VkSemaphore(p_cmd_semaphores[i].id));
 		}
 
-		VkSemaphore present_semaphore = VK_NULL_HANDLE;
+		for (uint32_t i = 0; i < p_swap_chains.size(); i++) {
-		if (p_swap_chains.size() > 0) {
+			const SwapChain *swap_chain = (const SwapChain *)(p_swap_chains[i].id);
-			if (command_queue->present_semaphores.is_empty()) {
+			VkSemaphore semaphore = swap_chain->present_semaphores[swap_chain->image_index];
-				// Create the semaphores used for presentation if they haven't been created yet.
+			present_semaphores.push_back(semaphore);
-				VkSemaphore semaphore = VK_NULL_HANDLE;
+			signal_semaphores.push_back(semaphore);
-				VkSemaphoreCreateInfo create_info = {};
-				create_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
-
-				for (uint32_t i = 0; i < frame_count; i++) {
-					err = vkCreateSemaphore(vk_device, &create_info, VKC::get_allocation_callbacks(VK_OBJECT_TYPE_SEMAPHORE), &semaphore);
-					ERR_FAIL_COND_V(err != VK_SUCCESS, FAILED);
-					command_queue->present_semaphores.push_back(semaphore);
-				}
-			}
-
-			// If a presentation semaphore is required, cycle across the ones available on the queue. It is technically possible
-			// and valid to reuse the same semaphore for this particular operation, but we create multiple ones anyway in case
-			// some hardware expects multiple semaphores to be used.
-			present_semaphore = command_queue->present_semaphores[command_queue->present_semaphore_index];
-			signal_semaphores.push_back(present_semaphore);
-			command_queue->present_semaphore_index = (command_queue->present_semaphore_index + 1) % command_queue->present_semaphores.size();
 		}
 
 		VkSubmitInfo submit_info = {};
@@ -2750,10 +2736,9 @@ Error RenderingDeviceDriverVulkan::command_queue_execute_and_present(CommandQueu
 			command_queue->pending_semaphores_for_fence.clear();
 		}
 
-		if (present_semaphore != VK_NULL_HANDLE) {
+		if (!present_semaphores.is_empty()) {
 			// If command buffers were executed, swap chains must wait on the present semaphore used by the command queue.
-			wait_semaphores.clear();
+			wait_semaphores = present_semaphores;
-			wait_semaphores.push_back(present_semaphore);
 		}
 	}
 
@@ -2838,11 +2823,6 @@ void RenderingDeviceDriverVulkan::command_queue_free(CommandQueueID p_cmd_queue)
 
 	CommandQueue *command_queue = (CommandQueue *)(p_cmd_queue.id);
 
-	// Erase all the semaphores used for presentation.
-	for (VkSemaphore semaphore : command_queue->present_semaphores) {
-		vkDestroySemaphore(vk_device, semaphore, VKC::get_allocation_callbacks(VK_OBJECT_TYPE_SEMAPHORE));
-	}
-
 	// Erase all the semaphores used for image acquisition.
 	for (VkSemaphore semaphore : command_queue->image_semaphores) {
 		vkDestroySemaphore(vk_device, semaphore, VKC::get_allocation_callbacks(VK_OBJECT_TYPE_SEMAPHORE));
@@ -3024,6 +3004,12 @@ void RenderingDeviceDriverVulkan::_swap_chain_release(SwapChain *swap_chain) {
 
 	swap_chain->command_queues_acquired.clear();
 	swap_chain->command_queues_acquired_semaphores.clear();
+
+	for (VkSemaphore semaphore : swap_chain->present_semaphores) {
+		vkDestroySemaphore(vk_device, semaphore, VKC::get_allocation_callbacks(VK_OBJECT_TYPE_SEMAPHORE));
+	}
+
+	swap_chain->present_semaphores.clear();
 }
 
 RenderingDeviceDriver::SwapChainID RenderingDeviceDriverVulkan::swap_chain_create(RenderingContextDriver::SurfaceID p_surface) {
@@ -3360,6 +3346,17 @@ Error RenderingDeviceDriverVulkan::swap_chain_resize(CommandQueueID p_cmd_queue,
 		swap_chain->framebuffers.push_back(RDD::FramebufferID(framebuffer));
 	}
 
+	VkSemaphore vk_semaphore = VK_NULL_HANDLE;
+	for (uint32_t i = 0; i < image_count; i++) {
+		VkSemaphoreCreateInfo create_info = {};
+		create_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+
+		err = vkCreateSemaphore(vk_device, &create_info, VKC::get_allocation_callbacks(VK_OBJECT_TYPE_SEMAPHORE), &vk_semaphore);
+		ERR_FAIL_COND_V(err != VK_SUCCESS, FAILED);
+
+		swap_chain->present_semaphores.push_back(vk_semaphore);
+	}
+
 	// Once everything's been created correctly, indicate the surface no longer needs to be resized.
 	context_driver->surface_set_needs_resize(swap_chain->surface, false);
 

drivers/vulkan/rendering_device_driver_vulkan.h

@@ -302,7 +302,6 @@ public:
 	// ----- QUEUE -----
 private:
 	struct CommandQueue {
-		LocalVector<VkSemaphore> present_semaphores;
 		LocalVector<VkSemaphore> image_semaphores;
 		LocalVector<SwapChain *> image_semaphores_swap_chains;
 		LocalVector<uint32_t> pending_semaphores_for_execute;
@@ -311,7 +310,6 @@ private:
 		LocalVector<Pair<Fence *, uint32_t>> image_semaphores_for_fences;
 		uint32_t queue_family = 0;
 		uint32_t queue_index = 0;
-		uint32_t present_semaphore_index = 0;
 	};
 
 public:
@@ -361,6 +359,7 @@ private:
 		VkColorSpaceKHR color_space = VK_COLOR_SPACE_SRGB_NONLINEAR_KHR;
 		TightLocalVector<VkImage> images;
 		TightLocalVector<VkImageView> image_views;
+		TightLocalVector<VkSemaphore> present_semaphores;
 		TightLocalVector<FramebufferID> framebuffers;
 		LocalVector<CommandQueue *> command_queues_acquired;
 		LocalVector<uint32_t> command_queues_acquired_semaphores;