X-Git-Url: http://git.mutantstargoat.com?a=blobdiff_plain;f=src%2Fvulkan%2Fvk.cc;h=0e3725b32150a31678535480a9f9a5597a05974e;hb=32feb79dc3b9ddeeab84a0329d53b8aaff86bb80;hp=105cabae25dd07f5fd287114dda061288f158e3f;hpb=0c5fa3525b2c8151bf83a215eee992c257d6fa28;p=demo

diff --git a/src/vulkan/vk.cc b/src/vulkan/vk.cc
index 105caba..0e3725b 100644
--- a/src/vulkan/vk.cc
+++ b/src/vulkan/vk.cc
@@ -4,39 +4,46 @@
 #include <alloca.h>
 #include <stdio.h>
 #include <string.h>
-
 #include <string>
 #include <vector>
 
+#include <gmath/gmath.h>
+
 #include "gfxapi.h"
+#include "vkutil.h"
 
 /* global variables */
 extern GLFWwindow *win;
 extern int win_w;
 extern int win_h;
 
-/* static variables */
-static std::vector<std::string> enabled_extension_names;
-static VkInstance inst;
-static VkDevice device;
-static VkPhysicalDevice pdev;
-static VkSurfaceKHR surface;
-static uint32_t device_mem_idx;
-static uint32_t num_queues;
-static uint32_t qfamily_idx;
-
-static const char *print_vulkan_error(VkResult error);
-static const char *dev_type_str(VkPhysicalDeviceType type);
-static const char *heap_flags_str(VkMemoryHeapFlags flags);
-static const char *memtype_flags_str(VkMemoryPropertyFlags flags);
-static const char *queue_flags_str(VkQueueFlags flags);
-
-/* static fumctions */
-static bool create_instance();
-static bool create_device();
+VkCommandBuffer *swapchain_cmd_bufs;
+
+/* static functions */
+static void error_callback(int error, const char *descr);
+static void clear(float r, float g, float b);
+static void viewport(int x, int y, int width, int height);
+static void zbuffer(bool enable);
+static void cull_face(Gfx_cull_face cf);
+static void reshape(int width, int height);
+static void swapbuffers();
+static void begin_drawing();
+static void end_drawing();
+
+static bool create_swapchain_cmd_bufs(VkCommandPool vkcmdpool);
+static bool record_cmd_clear(float r, float g, float b);
 
 bool init_vulkan()
 {
+	gfx_clear = clear;
+	gfx_viewport = viewport;
+	gfx_zbuffer = zbuffer;
+	gfx_cull_face = cull_face;
+	gfx_reshape = reshape;
+	gfx_swapbuffers = swapbuffers;
+	gfx_begin_drawing = begin_drawing;
+	gfx_end_drawing = end_drawing;
+
 	if(!glfwInit()) {
 		fprintf(stderr, "Failed to initialize GLFW.\n");
 		return false;
@@ -47,12 +54,14 @@ bool init_vulkan()
 		return false;
 	}
 
-	if(!create_instance()) {
-		fprintf(stderr, "Failed to enable validation.\n");
+	glfwSetErrorCallback(error_callback);
+
+	if(!vku_create_device()) {
+		fprintf(stderr, "Failed to initialize vulkan.\n");
 		return false;
 	}
 
-	if(!glfwGetPhysicalDevicePresentationSupport(inst, pdev, qfamily_idx)) {
+	if(!glfwGetPhysicalDevicePresentationSupport(vkinst, vkpdev, vkqfamily)) {
 		fprintf(stderr, "Presentation support not found.\n");
 		return false;
 	}
@@ -63,341 +72,221 @@ bool init_vulkan()
 		return false;
 	}
 
-	if(VkResult err = glfwCreateWindowSurface(inst, win, 0, &surface)) {
-		fprintf(stderr, "Failed to create KHR surface: %s\n", print_vulkan_error(err));
+	if(VkResult err = glfwCreateWindowSurface(vkinst, win, 0, &vksurface)) {
+		fprintf(stderr, "Failed to create KHR surface: %s\n", vku_get_vulkan_error_str(err));
 		return false;
 	}
 
-	return true;
-}
-
-void cleanup_vulkan()
-{
-	//TODOs according to the book:
-	// 1- make sure all threads have been terminated (when I add threads)
-	// 2- destroy objects in *reverse* order
-
-	vkDestroySurfaceKHR(inst, surface, 0);
-
-	if(vkDeviceWaitIdle(device) == VK_SUCCESS) {
-		vkDestroyDevice(device, 0);
-		vkDestroyInstance(inst, 0);
-	}
-}
-
-static bool create_instance()
-{
-	/* enable layers */
-	uint32_t layer_count = 0;
-	std::vector<const char *> enabled_layers;
-
-	if(vkEnumerateInstanceLayerProperties(&layer_count, 0) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to query layer properties.\n");
+	if(!vku_create_semaphores())
 		return false;
-	}
 
-	if(layer_count > 0) {
-		VkLayerProperties *layers = (VkLayerProperties *)alloca(layer_count * sizeof *layers);
-		vkEnumerateInstanceLayerProperties(&layer_count, layers);
-		for(uint32_t i=0; i<layer_count; i++) {
-			if(strcmp(layers[i].layerName, "VK_LAYER_LUNARG_standard_validation")) {
-				enabled_layers.push_back(layers[i].layerName);
-			}
-		}
+	if(!(vkswapchain = vku_create_swapchain(vksurface, win_w, win_h, 2,
+	                                        VK_PRESENT_MODE_FIFO_KHR, 0))) {
+		fprintf(stderr, "Failed to create swapchain.\n");
+		return false;
 	}
 
-	/* enable extensions */
-	uint32_t extensions_count = 0;
-	std::vector<const char *> enabled_extensions;
-
-	if(vkEnumerateInstanceExtensionProperties(0, &extensions_count, 0) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to enumerate instance extension properties\n");
+	vkswapchain_images = vku_get_swapchain_images(vkswapchain, &vknum_swapchain_images);
+	if(!vkswapchain_images) {
+		fprintf(stderr, "Failed to get swapchain images.\n");
 		return false;
 	}
 
-	if(extensions_count > 0) {
-		VkExtensionProperties *extensions = (VkExtensionProperties *)alloca(extensions_count * sizeof *extensions);
-		vkEnumerateInstanceExtensionProperties(0, &extensions_count, extensions);
-
-		for(uint32_t i=0; i<extensions_count; i++) {
-			printf("Extension %u: %s %u.\n", i, extensions[i].extensionName, extensions[i].specVersion);
-			//enable all the available extensions
-			enabled_extensions.push_back(extensions[i].extensionName);
-			enabled_extension_names.push_back(std::string(extensions[i].extensionName));
+	/*	vkswapchain_views = vku_create_image_views(vkswapchain_images, vknum_swapchain_images);
+		if(!vkswapchain_views) {
+			fprintf(stderr, "Failed to create swapchain image views.\n");
+			delete [] vkswapchain_images;
+			return false;
 		}
-	}
-
-	/* create instance */
-	VkInstanceCreateInfo create_info;
-	memset(&create_info, 0, sizeof create_info);
-	create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
-
-	if(!enabled_layers.empty()) {
-		create_info.enabledLayerCount = enabled_layers.size();
-		create_info.ppEnabledLayerNames = enabled_layers.data();
-	}
-
-	if(!enabled_extensions.empty()) {
-		create_info.enabledExtensionCount = enabled_extensions.size();
-		create_info.ppEnabledExtensionNames = enabled_extensions.data();
-	}
-
-	if(vkCreateInstance(&create_info, 0, &inst) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to create instance.\n");
+	*/
+	if(!create_swapchain_cmd_bufs(vkcmdpool)) {
 		return false;
 	}
 
-	if(!create_device())
+	if(!record_cmd_clear(1.0, 0.1, 0.1))
 		return false;
 
 	return true;
 }
 
-static bool create_device()
+void cleanup_vulkan()
 {
-	int qfam_idx = -1;
-	int pdev_idx = -1;
-
-	uint32_t dev_count;
-	if(vkEnumeratePhysicalDevices(inst, &dev_count, 0) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to enumerate physical devices.\n");
-		return false;
+	vkFreeCommandBuffers(vkdev, vkcmdpool, vknum_swapchain_images, swapchain_cmd_bufs);
+	if(win) {
+		glfwDestroyWindow(win);
 	}
-	printf("%u devices found.\n", (unsigned int)dev_count);
-
-	VkPhysicalDevice *phys_dev = (VkPhysicalDevice *)alloca(dev_count * sizeof *phys_dev);
-	vkEnumeratePhysicalDevices(inst, &dev_count, phys_dev);
-	VkPhysicalDeviceMemoryProperties memprop;
-
-	for(uint32_t i=0; i<dev_count; i++) {
-		VkPhysicalDeviceProperties dev_props;
-		vkGetPhysicalDeviceProperties(phys_dev[i], &dev_props);
-
-		//memory heaps:
-		vkGetPhysicalDeviceMemoryProperties(phys_dev[i], &memprop);
-		printf("\tNumber of heaps: %u\n", memprop.memoryHeapCount);
-		for(uint32_t j=0; j<memprop.memoryHeapCount; j++) {
-			printf("\t\tHeap %u size: %lu\n", j, (unsigned long)memprop.memoryHeaps[j].size);
-			printf("\t\tHeap %u flags: %s\n", j, heap_flags_str(memprop.memoryHeaps[j].flags));
-		}
-		//memory types
-		printf("\tMemory types: %u\n", memprop.memoryTypeCount);
-		for(uint32_t j=0; j<memprop.memoryTypeCount; j++) {
-			printf("\t\tType %u heap index: %u\n", j, memprop.memoryTypes[j].heapIndex);
-			printf("\t\tType %u flags: %s\n", j, memtype_flags_str(memprop.memoryTypes[j].propertyFlags));
-		}
+	glfwTerminate();
 
-		//supported features
-		VkPhysicalDeviceFeatures features;
-		vkGetPhysicalDeviceFeatures(phys_dev[i], &features);
-
-		//queue families
-		uint32_t qfam_count;
-		vkGetPhysicalDeviceQueueFamilyProperties(phys_dev[i], &qfam_count, 0);
-		printf("\tQueue Families: %u\n", qfam_count);
-		VkQueueFamilyProperties *qfam_props = new VkQueueFamilyProperties[qfam_count];
-		vkGetPhysicalDeviceQueueFamilyProperties(phys_dev[i], &qfam_count, qfam_props);
-		for(uint32_t j=0; j<qfam_count; j++) {
-			printf("\t\tFamily %u flags: %s\n", j, queue_flags_str(qfam_props[j].queueFlags));
-			printf("\t\tFamily %u number of queues: %u\n", j, qfam_props[j].queueCount);
-
-			if((qfam_props[j].queueFlags & VK_QUEUE_GRAPHICS_BIT) && (pdev_idx == -1)) {
-				pdev_idx = i;
-				qfam_idx = j;
-				num_queues = qfam_props[j].queueCount;
-			}
-		}
-		delete [] qfam_props;
-	}
-
-	if(pdev_idx == -1) {
-		fprintf(stderr, "No suitable devices found.\n");
-		return false;
-	}
-
-	pdev = *(phys_dev + pdev_idx);
-	qfamily_idx = qfam_idx;
-
-	/*	uint32_t layer_count;
-		if(vkEnumerateDeviceLayerProperties(pdev, &layer_count, 0) != VK_SUCCESS) {
-			fprintf(stderr, "Failed to enumerate device layers.\n");
-			return false;
-		}
-		if(layer_count > 0) {
-			VkLayerProperties *layers = (VkLayerProperties*)alloca(layer_count * sizeof *layers);
-			vkEnumerateDeviceLayerProperties(pdev, &layer_count, layers);
-			printf("%u layers found.\n", layer_count);
-			for(uint32_t i=0; i<layer_count; i++) {
-				printf("Layer %u: %s (%u, %u)\n", i, layers[i].layerName,
-						layers[i].specVersion, layers[i].implementationVersion);
-				printf("\tDesc: %s\n", layers[i].description);
-			}
-		}
-	*/
-	VkDeviceCreateInfo dev_info;
-	memset(&dev_info, 0, sizeof dev_info);
-	dev_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
-
-	VkDeviceQueueCreateInfo dev_qinfo;
-	memset(&dev_qinfo, 0, sizeof dev_qinfo);
-	dev_qinfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
-	dev_qinfo.queueFamilyIndex = qfam_idx;
-	dev_qinfo.queueCount = 1;
+	//TODOs according to the book:
+	// 1- make sure all threads have been terminated (when I add threads)
+	vku_cleanup();
+}
 
-	dev_info.queueCreateInfoCount = 1;
-	dev_info.pQueueCreateInfos = &dev_qinfo;
+static void error_callback(int error, const char *description)
+{
+	fprintf(stderr, "GLFW error %d: %s.\n", error, description);
+}
 
-	if(vkCreateDevice(pdev, &dev_info, 0, &device) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to create logical device.\n");
-		return false;
+static void reshape(int width, int height)
+{
+	VkSwapchainKHR sc;
+	if(!(sc = vku_create_swapchain(vksurface, width, height, 2, VK_PRESENT_MODE_FIFO_KHR,
+	                               vkswapchain))) {
+		fprintf(stderr, "Failed to create %dx%d double-buffered swapchain\n", width, height);
+		return;
 	}
+	vkswapchain = sc;
 
-	vkGetPhysicalDeviceMemoryProperties(pdev, &memprop);
-	for(uint32_t j=0; j<memprop.memoryTypeCount; j++) {
-		if(memprop.memoryTypes[j].propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) {
-			device_mem_idx = j;
-			printf("Selected device memory index: %u\n", device_mem_idx);
-			break;
-		}
-	}
+	delete [] vkswapchain_images;
+	vkswapchain_images = vku_get_swapchain_images(sc, 0);
+	vk_curr_swapchain_image = vku_get_next_image(vkswapchain);
+}
 
-	return true;
+static void clear(float r, float g, float b)
+{
 }
 
-static const char *print_vulkan_error(VkResult error)
+static void viewport(int x, int y, int width, int height)
 {
-	std::string errmsg;
-	switch(error) {
-	case VK_SUCCESS:
-		errmsg = std::string("VK_SUCCESS");
-		break;
-	case VK_NOT_READY:
-		errmsg = std::string("VK_NOT_READY");
-		break;
-	case VK_TIMEOUT:
-		errmsg = std::string("VK_TIMEOUT");
-		break;
-	case VK_EVENT_SET:
-		errmsg = std::string("VK_EVENT_SET");
-		break;
-	case VK_EVENT_RESET:
-		errmsg = std::string("VK_EVENT_RESET");
-		break;
-	case VK_INCOMPLETE:
-		errmsg = std::string("VK_EVENT");
-		break;
-	case VK_ERROR_OUT_OF_HOST_MEMORY:
-		errmsg = std::string("VK_ERROR_OUT_OF_HOST_MEMORY");
-		break;
-	case VK_ERROR_OUT_OF_DEVICE_MEMORY:
-		errmsg = std::string("VK_ERROR_OUT_OF_DEVICE_MEMORY");
-		break;
-	case VK_ERROR_INITIALIZATION_FAILED:
-		errmsg = std::string("VK_ERROR_INITIALIZATION_FAILED");
-		break;
-	case VK_ERROR_DEVICE_LOST:
-		errmsg = std::string("VK_ERROR_DEVICE_LOST");
-		break;
-	case VK_ERROR_MEMORY_MAP_FAILED:
-		errmsg = std::string("VK_ERROR_MEMORY_MAP_FAILED");
-		break;
-	case VK_ERROR_LAYER_NOT_PRESENT:
-		errmsg = std::string("VK_ERROR_LAYER_NOT_PRESENT");
-		break;
-	case VK_ERROR_EXTENSION_NOT_PRESENT:
-		errmsg = std::string("VK_ERROR_EXTENSION_NOT_PRESENT");
-		break;
-	case VK_ERROR_FEATURE_NOT_PRESENT:
-		errmsg = std::string("VK_ERROR_FEATURE_NOT_PRESENT");
-		break;
-	case VK_ERROR_INCOMPATIBLE_DRIVER:
-		errmsg = std::string("VK_ERROR_INCOMPATIBLE_DRIVER");
-		break;
-	case VK_ERROR_TOO_MANY_OBJECTS:
-		errmsg = std::string("VK_ERROR_TOO_MANY_OBJECTS");
-		break;
-	case VK_ERROR_FORMAT_NOT_SUPPORTED:
-		errmsg = std::string("VK_ERROR_FORMAT_NOT_SUPPORTED");
-		break;
-	case VK_ERROR_FRAGMENTED_POOL:
-		errmsg = std::string("VK_ERROR_FRAGMENTED_POOL");
-		break;
-	default:
-		errmsg = std::string("UNKNOWN");
-		break;
-	}
+}
 
-	return errmsg.c_str();
+static void zbuffer(bool enable)
+{
 }
 
-static const char *dev_type_str(VkPhysicalDeviceType type)
+static void cull_face(Gfx_cull_face cf)
 {
-	switch(type) {
-	case VK_PHYSICAL_DEVICE_TYPE_OTHER:
-		return "other";
-	case VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU:
-		return "integrated GPU";
-	case VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU:
-		return "discrete GPU";
-	case VK_PHYSICAL_DEVICE_TYPE_VIRTUAL_GPU:
-		return "virtual GPU";
-	case VK_PHYSICAL_DEVICE_TYPE_CPU:
-		return "CPU";
-	default:
-		break;
-	}
-	return "unknown";
 }
 
-static const char *heap_flags_str(VkMemoryHeapFlags flags)
+static void swapbuffers()
 {
-	static std::string str;
-	str.clear();
-	if(flags & VK_MEMORY_HEAP_DEVICE_LOCAL_BIT) {
-		str += "device-local ";
-	}
-	if(!str.empty())
-		str.pop_back();
-	return str.c_str();
 }
 
-static const char *memtype_flags_str(VkMemoryPropertyFlags flags)
+static void begin_drawing()
 {
-	static std::string str;
-	str.clear();
-	if(flags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) {
-		str += "device-local ";
-	}
-	if(flags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) {
-		str += "host-visible ";
+	if((vk_curr_swapchain_image = vku_get_next_image(vkswapchain)) == -1) {
+		fprintf(stderr, "Failed to get swapchain image. Exiting.\n");
+		exit(1);
 	}
-	if(flags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) {
-		str += "host-coherent ";
+}
+
+static void end_drawing()
+{
+	/* submit queue */
+
+	VkSubmitInfo sinf;
+	memset(&sinf, 0, sizeof sinf);
+	sinf.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+	sinf.waitSemaphoreCount = 1;
+	sinf.pWaitSemaphores = &vk_img_avail_sema;
+	sinf.signalSemaphoreCount = 1;
+	sinf.pSignalSemaphores = &vk_rend_done_sema;
+
+	// the queue should wait on the semaphore
+
+	VkPipelineStageFlags wait_flags = VK_PIPELINE_STAGE_TRANSFER_BIT;
+	sinf.pWaitDstStageMask = &wait_flags;
+	sinf.commandBufferCount = 1;
+	sinf.pCommandBuffers = &swapchain_cmd_bufs[vk_curr_swapchain_image];
+
+	if(vkQueueSubmit(vkq, 1, &sinf, VK_NULL_HANDLE) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to submit drawing command buffer\n");
+		exit(1);
 	}
-	if(flags & VK_MEMORY_PROPERTY_HOST_CACHED_BIT) {
-		str += "host-cached ";
+
+	/* present drawn image */
+	VkPresentInfoKHR pinf;
+	memset(&pinf, 0, sizeof pinf);
+	pinf.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
+	pinf.waitSemaphoreCount = 1;
+	pinf.pWaitSemaphores = &vk_rend_done_sema;
+	pinf.swapchainCount = 1;
+	pinf.pSwapchains = &vkswapchain;
+	pinf.pImageIndices = (uint32_t *)&vk_curr_swapchain_image;
+
+	if(vkQueuePresentKHR(vkq, &pinf) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to submit presentation command buffer.\n");
+		exit(1);
 	}
-	if(flags & VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT) {
-		str += "lazily-allocated ";
+}
+
+static bool record_cmd_clear(float r, float g, float b)
+{
+	VkCommandBufferBeginInfo binf;
+	binf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+	binf.flags = VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT;
+
+	/* this function must be called outside a renderpass instance */
+	const VkClearColorValue pcolor[4] = {r, g, b, 1.0};
+
+	VkImageSubresourceRange range;
+	memset(&range, 0, sizeof range);
+	range.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+	range.baseMipLevel = 0;
+	range.baseArrayLayer = 0;
+	range.layerCount = 1;
+
+	for(int i=0; i<vknum_swapchain_images; i++) {
+		/* layout for clearing */
+		VkImageMemoryBarrier cb;
+		memset(&cb, 0, sizeof cb);
+		cb.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
+		cb.srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
+		cb.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
+		cb.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+		cb.newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
+		cb.srcQueueFamilyIndex = vkqfamily;
+		cb.dstQueueFamilyIndex = vkqfamily;
+		cb.image = vkswapchain_images[i];
+		cb.subresourceRange = range;
+
+		/* layout for presenting */
+		VkImageMemoryBarrier pb;
+		memset(&pb, 0, sizeof pb);
+		pb.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
+		pb.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
+		pb.dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
+		pb.oldLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
+		pb.newLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+		pb.srcQueueFamilyIndex = vkqfamily;
+		pb.dstQueueFamilyIndex = vkqfamily;
+		pb.image = vkswapchain_images[i];
+		pb.subresourceRange = range;
+
+		vkBeginCommandBuffer(swapchain_cmd_bufs[i], &binf);
+		vkCmdPipelineBarrier(swapchain_cmd_bufs[i], VK_PIPELINE_STAGE_TRANSFER_BIT,
+		                     VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, 0, 0, 0, 1, &pb);
+
+		vkCmdClearColorImage(swapchain_cmd_bufs[i], vkswapchain_images[vk_curr_swapchain_image], VK_IMAGE_LAYOUT_GENERAL,
+		                     pcolor, 1, &range);
+
+		vkCmdPipelineBarrier(swapchain_cmd_bufs[i], VK_PIPELINE_STAGE_TRANSFER_BIT,
+		                     VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, 0, 0, 0, 1, &cb);
+
+		if(vkEndCommandBuffer(swapchain_cmd_bufs[i]) != VK_SUCCESS) {
+			fprintf(stderr, "Failed to record command buffer.\n");
+			return false;
+		}
 	}
-	if(!str.empty())
-		str.pop_back();
-	return str.c_str();
+	return true;
 }
 
-static const char *queue_flags_str(VkQueueFlags flags)
+static bool create_swapchain_cmd_bufs(VkCommandPool cpool)
 {
-	static std::string str;
-	str.clear();
-	if(flags & VK_QUEUE_GRAPHICS_BIT)
-		str += "graphics ";
-	if(flags & VK_QUEUE_COMPUTE_BIT)
-		str += "compute ";
-	if(flags & VK_QUEUE_TRANSFER_BIT)
-		str += "transfer ";
-	if(flags & VK_QUEUE_SPARSE_BINDING_BIT)
-		str += "sparse-binding ";
-	if(!str.empty())
-		str.pop_back();
-	return str.c_str();
-}
\ No newline at end of file
+	swapchain_cmd_bufs = new VkCommandBuffer[vknum_swapchain_images];
+
+	VkCommandBufferAllocateInfo ainf;
+	memset(&ainf, 0, sizeof ainf);
+
+	ainf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
+	ainf.commandPool = cpool;
+	ainf.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
+	ainf.commandBufferCount = (uint32_t)vknum_swapchain_images;
+
+	if(vkAllocateCommandBuffers(vkdev, &ainf, swapchain_cmd_bufs) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to allocate the swapchain command buffers.\n");
+		return false;
+	}
+
+	return true;
+}