X-Git-Url: http://git.mutantstargoat.com?a=blobdiff_plain;f=src%2Fvulkan%2Fvk.cc;h=f5829ab13c53e95de8179357f3e2a5358cb973c4;hb=8fb0cca684e078cd2537070c53ad970ebbc2e9a7;hp=105cabae25dd07f5fd287114dda061288f158e3f;hpb=0c5fa3525b2c8151bf83a215eee992c257d6fa28;p=demo

diff --git a/src/vulkan/vk.cc b/src/vulkan/vk.cc
index 105caba..f5829ab 100644
--- a/src/vulkan/vk.cc
+++ b/src/vulkan/vk.cc
@@ -2,38 +2,58 @@
 #include <GLFW/glfw3.h>
 
 #include <alloca.h>
+#include <assert.h>
 #include <stdio.h>
 #include <string.h>
-
 #include <string>
 #include <vector>
 
+#include <gmath/gmath.h>
+
+#include "allocator.h"
 #include "gfxapi.h"
+#include "image.h"
+#include "vkutil.h"
+#include "vk.h"
 
 /* global variables */
 extern GLFWwindow *win;
 extern int win_w;
 extern int win_h;
 
+static VkCommandBuffer cmd_buf; // command buffer used at zbuffer creation
+//depth buffer
+static VkImage dimg;
+static VkImageView dview;
+//swapchain
+static VkImage *images;
+static VkImageView *iviews;
+static uint32_t num_images;
+
 /* 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();
+static VkDeviceMemory gpu_mem; // to be replaced when I fix the allocator
+// zbuffer image, view:
+
+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();
+static bool begin_command_buffer();
+static bool create_swapchain_image_views(VkFormat format);
+static bool create_zbuffer();
+
+static bool create_swapchain_cmd_bufs(VkCommandPool vk_pool);
+static bool record_cmd_clear(float r, float g, float b);
 
 bool init_vulkan()
 {
@@ -47,12 +67,16 @@ bool init_vulkan()
 		return false;
 	}
 
-	if(!create_instance()) {
-		fprintf(stderr, "Failed to enable validation.\n");
+	//TODO: remove later
+	glfwSetErrorCallback(error_callback);
+
+	/* create device and command pool! */
+	if(!vku_create_device()) {
+		fprintf(stderr, "Failed to initialize vulkan.\n");
 		return false;
 	}
 
-	if(!glfwGetPhysicalDevicePresentationSupport(inst, pdev, qfamily_idx)) {
+	if(!glfwGetPhysicalDevicePresentationSupport(vkinst, vk_physical, vkqfamily)) {
 		fprintf(stderr, "Presentation support not found.\n");
 		return false;
 	}
@@ -63,341 +87,501 @@ 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));
+	VkResult res = glfwCreateWindowSurface(vkinst, win, 0, &vk_surface);
+	if(res != VK_SUCCESS) {
+		fprintf(stderr, "Failed to create KHR surface: %s\n", vku_get_vulkan_error_str(res));
 		return false;
 	}
 
-	return true;
-}
+	if(!create_swapchain()) {
+		fprintf(stderr, "Failed to create swapchain.\n");
+		return false;
+	}
 
-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
+	cmd_buf = VK_NULL_HANDLE;
+	if(!begin_command_buffer()) {
+		fprintf(stderr, "Failed to start VK_NULL_HANDLE command buffer.\n");
+		return false;
+	}
 
-	vkDestroySurfaceKHR(inst, surface, 0);
+	if(!create_zbuffer()) {
+		fprintf(stderr, "Failed to create depth buffer.\n");
+		return false;
+	}
+
+	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(!vku_create_semaphores())
+		return false;
+
+	if(!(vk_swapchain = vku_create_swapchain(vk_surface, win_w, win_h, 2,
+	                                        VK_PRESENT_MODE_IMMEDIATE_KHR, 0))) {
+		fprintf(stderr, "Failed to create swapchain.\n");
+		return false;
+	}
 
-	if(vkDeviceWaitIdle(device) == VK_SUCCESS) {
-		vkDestroyDevice(device, 0);
-		vkDestroyInstance(inst, 0);
+	vkswapchain_images = vku_get_swapchain_images(vk_swapchain, &vknum_swapchain_images);
+	if(!vkswapchain_images) {
+		fprintf(stderr, "Failed to get swapchain images.\n");
+		return false;
 	}
+
+//		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;
+//		}
+
+	if(!create_swapchain_cmd_bufs(vk_pool)) {
+		return false;
+	}
+
+	if(!record_cmd_clear(1.0, 0.1, 0.1))
+		return false;
+	*/
+
+	return true;
 }
 
-static bool create_instance()
+static bool create_swapchain()
 {
-	/* enable layers */
-	uint32_t layer_count = 0;
-	std::vector<const char *> enabled_layers;
+	/* surface capabilities */
+	VkSurfaceCapabilitiesKHR scap;
+	if(vkGetPhysicalDeviceSurfaceCapabilitiesKHR(vk_physical, vk_surface, &scap) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get physical device surface capabilities\n");
+		return false;
+	}
 
-	if(vkEnumerateInstanceLayerProperties(&layer_count, 0) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to query layer properties.\n");
+	/* presentation modes */
+	uint32_t prmode_cnt;
+	if(vkGetPhysicalDeviceSurfacePresentModesKHR(vk_physical, vk_surface, &prmode_cnt, 0) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get physical device surface presentation modes count.\n");
 		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(prmode_cnt == 0) {
+		fprintf(stderr, "Presentation modes not found.\n");
+		return false;
 	}
 
-	/* enable extensions */
-	uint32_t extensions_count = 0;
-	std::vector<const char *> enabled_extensions;
+	VkPresentModeKHR scmode = VK_PRESENT_MODE_FIFO_KHR;
+	VkPresentModeKHR *modes = new VkPresentModeKHR[prmode_cnt];
 
-	if(vkEnumerateInstanceExtensionProperties(0, &extensions_count, 0) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to enumerate instance extension properties\n");
+	if(vkGetPhysicalDeviceSurfacePresentModesKHR(vk_physical, vk_surface, &prmode_cnt, modes) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get physical device presentation modes.\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));
+	for(uint32_t i=0; i<prmode_cnt; i++) {
+		if(modes[i] == VK_PRESENT_MODE_MAILBOX_KHR) {
+			scmode = VK_PRESENT_MODE_MAILBOX_KHR;
+			break;
+		}
+		if((scmode != VK_PRESENT_MODE_MAILBOX_KHR) && (modes[i] == VK_PRESENT_MODE_IMMEDIATE_KHR)) {
+				//fallback
+				scmode = VK_PRESENT_MODE_IMMEDIATE_KHR;
 		}
 	}
 
-	/* 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();
+	/* swapchain extents */
+	VkExtent2D scextent;
+	if(scap.currentExtent.width == 0xffffffff || scap.currentExtent.height == 0xffffffff) {
+		scextent.width = win_w;
+		scextent.height = win_h;
 	}
-
-	if(!enabled_extensions.empty()) {
-		create_info.enabledExtensionCount = enabled_extensions.size();
-		create_info.ppEnabledExtensionNames = enabled_extensions.data();
+	else {
+		scextent = scap.currentExtent;
+		win_w = scextent.width;
+		win_h = scextent.height;
 	}
 
-	if(vkCreateInstance(&create_info, 0, &inst) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to create instance.\n");
+	/* number of swapchain images (on intel that's 3: maybe should hardcode it to 2?) */
+	num_images = scap.minImageCount; //+ 1;
+	/* intel doesn't set the maxImageCount */
+	if(scap.maxImageCount > 0 && num_images > scap.maxImageCount)
+		num_images = scap.maxImageCount;
+
+	printf("num_images : %u\n", num_images);
+	assert(num_images > 0);
+
+	/* transform flags */
+	VkSurfaceTransformFlagBitsKHR pre_transf = scap.currentTransform;
+	if(scap.supportedTransforms & VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR)
+		pre_transf = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
+
+	/* find suitable colorspace, format */
+	uint32_t fcount;
+	if(vkGetPhysicalDeviceSurfaceFormatsKHR(vk_physical, vk_surface, &fcount, 0) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get format count for physical device.\n");
+		return false;
+	}
+	if(fcount == 0) {
+		fprintf(stderr, "No color formats were found.\n");
 		return false;
 	}
 
-	if(!create_device())
+	VkFormat format;
+	VkColorSpaceKHR colorspace;
+
+	VkSurfaceFormatKHR *formats = new VkSurfaceFormatKHR[fcount];
+	if(vkGetPhysicalDeviceSurfaceFormatsKHR(vk_physical, vk_surface, &fcount, formats) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get surface formats.\n");
+		return false;
+	}
+	if((fcount == 1) && (formats[0].format == VK_FORMAT_UNDEFINED)) {
+		format = VK_FORMAT_B8G8R8_UNORM;
+	} else {
+		format = formats[0].format;
+	}
+	colorspace = formats[0].colorSpace;
+
+	/* creating the swapchain */
+	VkSwapchainCreateInfoKHR sinfo;
+	memset(&sinfo, 0, sizeof sinfo);
+
+	sinfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
+	sinfo.surface = vk_surface;
+	sinfo.minImageCount = num_images;
+	sinfo.imageFormat = format;
+	sinfo.imageColorSpace = colorspace;
+	sinfo.imageExtent = scextent;
+	sinfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+	sinfo.preTransform = pre_transf;
+	sinfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
+	sinfo.imageArrayLayers = 1;
+	sinfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
+	sinfo.presentMode = scmode;
+	sinfo.oldSwapchain = VK_NULL_HANDLE; //TODO
+	sinfo.clipped = VK_TRUE; //TODO
+
+	if(vkCreateSwapchainKHR(vk_device, &sinfo, 0, &vk_swapchain) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to create swapchain.\n");
 		return false;
+	}
 
-	return true;
-}
+	if(vkGetSwapchainImagesKHR(vk_device, vk_swapchain, &num_images, 0) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get the number of the swapchain images.\n");
+		return false;
+	}
 
-static bool create_device()
-{
-	int qfam_idx = -1;
-	int pdev_idx = -1;
+	images = new VkImage[num_images];
+	if(vkGetSwapchainImagesKHR(vk_device, vk_swapchain, &num_images, images) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to get the swapchain images.\n");
+		return false;
+	}
+	assert(images);
 
-	uint32_t dev_count;
-	if(vkEnumeratePhysicalDevices(inst, &dev_count, 0) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to enumerate physical devices.\n");
+	if(!create_swapchain_image_views(format)) {
+		fprintf(stderr, "Failed to create image views for the swapchain images.\n");
 		return false;
 	}
-	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;
+	// create renderpass
 
-	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));
+	return true;
+}
+
+static bool create_swapchain_image_views(VkFormat format)
+{
+	VkImageViewCreateInfo ivinf;
+	memset(&ivinf, 0, sizeof ivinf);
+
+	ivinf.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+	ivinf.format = format;
+	ivinf.components = {
+		VK_COMPONENT_SWIZZLE_R,
+		VK_COMPONENT_SWIZZLE_G,
+		VK_COMPONENT_SWIZZLE_B,
+		VK_COMPONENT_SWIZZLE_A
+	};
+	ivinf.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+	ivinf.subresourceRange.levelCount = 1;
+	ivinf.subresourceRange.layerCount = 1;
+	ivinf.viewType = VK_IMAGE_VIEW_TYPE_2D;
+
+	iviews = new VkImageView[num_images];
+	for(uint32_t i=0; i<num_images; i++) {
+		ivinf.image = images[i];
+		if(vkCreateImageView(vk_device, &ivinf, 0, &iviews[i]) != VK_SUCCESS) {
+			fprintf(stderr, "Failed to create view for the swapchain image: %d.\n", i);
+			return false;
 		}
+	}
+	return true;
+}
 
-		//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;
-			}
+static bool begin_command_buffer()
+{
+	if(cmd_buf == VK_NULL_HANDLE) {
+		cmd_buf = vku_alloc_cmdbuf(vk_pool, VK_COMMAND_BUFFER_LEVEL_PRIMARY);
+
+		VkCommandBufferInheritanceInfo ciinf;
+		memset(&ciinf, 0, sizeof ciinf);
+		ciinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO;
+		ciinf.renderPass = VK_NULL_HANDLE;
+		ciinf.framebuffer = VK_NULL_HANDLE;
+		ciinf.occlusionQueryEnable = VK_FALSE;
+
+		VkCommandBufferBeginInfo cbinf;
+		memset(&cbinf, 0, sizeof cbinf);
+		cbinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+		cbinf.pInheritanceInfo = &ciinf;
+
+		if(vkBeginCommandBuffer(cmd_buf, &cbinf) != VK_SUCCESS) {
+			fprintf(stderr, "Failed to begin command buffer.\n");
+			return false;
 		}
-		delete [] qfam_props;
 	}
+	return true;
+}
 
-	if(pdev_idx == -1) {
-		fprintf(stderr, "No suitable devices found.\n");
+static bool create_zbuffer()
+{
+	VkFormat dformat = VK_FORMAT_D32_SFLOAT_S8_UINT;
+
+	VkImageCreateInfo dinfo;
+	memset(&dinfo, 0, sizeof dinfo);
+
+	dinfo.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
+	dinfo.imageType = VK_IMAGE_TYPE_2D;
+	dinfo.format = dformat;
+	dinfo.extent = {win_w, win_h, 1};
+	dinfo.mipLevels = 1;
+	dinfo.arrayLayers = 1;
+	dinfo.samples = VK_SAMPLE_COUNT_1_BIT;
+	dinfo.tiling = VK_IMAGE_TILING_OPTIMAL;
+	dinfo.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+
+	if(vkCreateImage(vk_device, &dinfo, 0, &dimg) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to create depth buffer image.\n");
 		return false;
 	}
 
-	pdev = *(phys_dev + pdev_idx);
-	qfamily_idx = qfam_idx;
+	VkMemoryRequirements dmem_reqs;
+	vkGetImageMemoryRequirements(vk_device, dimg, &dmem_reqs);
 
-	/*	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;
+	gpu_mem = vk_allocate(dmem_reqs.size);
 
-	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;
+	if(!gpu_mem)
+		return false;
 
-	dev_info.queueCreateInfoCount = 1;
-	dev_info.pQueueCreateInfos = &dev_qinfo;
+	vkBindImageMemory(vk_device, dimg, gpu_mem, 0);
 
-	if(vkCreateDevice(pdev, &dev_info, 0, &device) != VK_SUCCESS) {
-		fprintf(stderr, "Failed to create logical device.\n");
+	// XXX set image layout
+	if(!vk_image_set_layout(cmd_buf, dimg, VK_IMAGE_ASPECT_DEPTH_BIT,
+			VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
+			(VkAccessFlagBits)0)) {
+		fprintf(stderr, "Failed to set depth buffer layout.\n");
 		return false;
 	}
 
-	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;
-		}
+	VkImageViewCreateInfo div_inf;
+	memset(&div_inf, 0, sizeof div_inf);
+
+	div_inf.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+	div_inf.image = dimg;
+	div_inf.format = dformat;
+	div_inf.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
+	div_inf.subresourceRange.levelCount = 1;
+	div_inf.subresourceRange.layerCount = 1;
+	div_inf.viewType = VK_IMAGE_VIEW_TYPE_2D;
+
+	if(vkCreateImageView(vk_device, &div_inf, 0, &dview) != VK_SUCCESS) {
+		fprintf(stderr, "Failed to create image view for depth buffer.\n");
 	}
 
 	return true;
 }
 
-static const char *print_vulkan_error(VkResult error)
+void cleanup_vulkan()
 {
-	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();
+	vkFreeCommandBuffers(vk_device, vk_pool, vknum_swapchain_images, swapchain_cmd_bufs);
+	if(win) {
+		glfwDestroyWindow(win);
+	}
+	glfwTerminate();
+
+	//TODOs according to the book:
+	// 1- make sure all threads have been terminated (when I add threads)
+	vku_cleanup();
 }
 
-static const char *dev_type_str(VkPhysicalDeviceType type)
+static void error_callback(int error, const char *description)
 {
-	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";
+	fprintf(stderr, "GLFW error %d: %s.\n", error, description);
 }
 
-static const char *heap_flags_str(VkMemoryHeapFlags flags)
+static void reshape(int width, int height)
 {
-	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();
+	VkSwapchainKHR sc;
+	if(!(sc = vku_create_swapchain(vk_surface, width, height, 2, VK_PRESENT_MODE_FIFO_KHR,
+	                               vk_swapchain))) {
+		fprintf(stderr, "Failed to create %dx%d double-buffered swapchain\n", width, height);
+		return;
+	}
+	vk_swapchain = sc;
+
+	delete [] vkswapchain_images;
+	vkswapchain_images = vku_get_swapchain_images(sc, 0);
+	vk_curr_swapchain_image = vku_get_next_image(vk_swapchain);
 }
 
-static const char *memtype_flags_str(VkMemoryPropertyFlags flags)
+static void clear(float r, float g, float b)
 {
-	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(flags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) {
-		str += "host-coherent ";
-	}
-	if(flags & VK_MEMORY_PROPERTY_HOST_CACHED_BIT) {
-		str += "host-cached ";
-	}
-	if(flags & VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT) {
-		str += "lazily-allocated ";
-	}
-	if(!str.empty())
-		str.pop_back();
-	return str.c_str();
 }
 
-static const char *queue_flags_str(VkQueueFlags flags)
+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 swapbuffers()
+{
+}
+
+static void begin_drawing()
+{
+	// if((vk_curr_swapchain_image = vku_get_next_image(vk_swapchain)) == -1) {
+	// 	fprintf(stderr, "Failed to get swapchain image. Exiting.\n");
+	// 	exit(1);
+	// }
+}
+
+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(vk_queue, 1, &sinf, VK_NULL_HANDLE) != VK_SUCCESS) {
+	// 	fprintf(stderr, "Failed to submit drawing command buffer\n");
+	// 	exit(1);
+	// }
+
+	// /* 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 = &vk_swapchain;
+	// pinf.pImageIndices = (uint32_t *)&vk_curr_swapchain_image;
+
+	// if(vkQueuePresentKHR(vk_queue, &pinf) != VK_SUCCESS) {
+	// 	fprintf(stderr, "Failed to submit presentation command buffer.\n");
+	// 	exit(1);
+	// }
+}
+
+static bool record_cmd_clear(float r, float g, float b)
 {
-	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
+// 	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;
+// 		}
+// 	}
+// 	return true;
+// }
+
+// static bool create_swapchain_cmd_bufs(VkCommandPool cpool)
+// {
+// 	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(vk_device, &ainf, swapchain_cmd_bufs) != VK_SUCCESS) {
+// 		fprintf(stderr, "Failed to allocate the swapchain command buffers.\n");
+// 		return false;
+// 	}
+
+	return true;
+}