Separate vulkan code into gpu module

gpu.c

@@ -0,0 +1,629 @@
+#include "gpu.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#define QUEUE_FAMILY_PROP_BUFFER_SIZE 16
+#define EXT_PROP_BUFFER_SIZE 256
+#define SURFACE_FMT_BUFFER_SIZE 64
+#define PRESENT_MODE_BUFFER_SIZE 8
+#define SWAPCHAIN_IMG_BUFFER_SIZE 4
+
+#define NELEMS(arr) (sizeof(arr) / sizeof(arr[0]))
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define CLAMP(x, min, max) MAX((min), MIN(x, (max)))
+
+static const char *layers[] = { "VK_LAYER_KHRONOS_validation" };
+static const char *extensions[] = {
+	VK_KHR_SWAPCHAIN_EXTENSION_NAME,
+};
+
+static constexpr size_t extension_count = NELEMS(extensions);
+
+static const char vert_shader[] = {
+#embed VERT_SHADER_SPV
+};
+
+static const char frag_shader[] = {
+#embed FRAG_SHADER_SPV
+};
+
+static VkShaderModule
+load_shader_module(VkDevice dev, const char *code, size_t code_size)
+{
+	const VkShaderModuleCreateInfo create_info = {
+		.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
+		.codeSize = code_size,
+		.pCode = (uint32_t *)code,
+	};
+	VkShaderModule mod;
+	const VkResult result
+	    = vkCreateShaderModule(dev, &create_info, nullptr, &mod);
+	assert(result == VK_SUCCESS);
+
+	return mod;
+}
+
+void gpu_init(gpu_ctx_t *ctx, const gpu_config_t *config)
+{
+	// Initialise Vulkan instance.
+	const VkApplicationInfo app_info = {
+		.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO,
+		.pApplicationName = config->application_name,
+		.applicationVersion = VK_MAKE_VERSION(1, 0, 0),
+		.pEngineName = "No Engine",
+		.engineVersion = VK_MAKE_VERSION(1, 0, 0),
+		.apiVersion = VK_API_VERSION_1_0,
+	};
+	uint32_t glfw_ext_count = 0;
+	const char **glfw_ext_names
+	    = glfwGetRequiredInstanceExtensions(&glfw_ext_count);
+	const VkInstanceCreateInfo inst_create_info = {
+		.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
+		.pApplicationInfo = &app_info,
+		.enabledExtensionCount = glfw_ext_count,
+		.ppEnabledExtensionNames = glfw_ext_names,
+		.enabledLayerCount = sizeof(layers) / sizeof(layers[0]),
+		.ppEnabledLayerNames = layers,
+	};
+	VkResult result
+	    = vkCreateInstance(&inst_create_info, nullptr, &ctx->inst);
+	assert(result == VK_SUCCESS);
+
+	// Create surface
+	result = glfwCreateWindowSurface(
+	    ctx->inst, config->window, nullptr, &ctx->surface);
+	assert(result == VK_SUCCESS);
+
+	// Select a physical device
+	uint32_t dev_count = 1;
+	result = vkEnumeratePhysicalDevices(
+	    ctx->inst, &dev_count, &ctx->physical_dev);
+	assert(result == VK_SUCCESS || result == VK_INCOMPLETE);
+
+	// Select queue family
+	uint32_t queue_family_count = QUEUE_FAMILY_PROP_BUFFER_SIZE;
+	VkQueueFamilyProperties
+	    queue_family_props[QUEUE_FAMILY_PROP_BUFFER_SIZE];
+	vkGetPhysicalDeviceQueueFamilyProperties(
+	    ctx->physical_dev, &queue_family_count, queue_family_props);
+	uint32_t queue_family;
+	bool found_queue_family = false;
+	for (unsigned i = 0; i < queue_family_count; ++i) {
+		if (queue_family_props[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) {
+			VkBool32 surface_support = false;
+			vkGetPhysicalDeviceSurfaceSupportKHR(
+			    ctx->physical_dev, i, ctx->surface, &surface_support);
+			if (surface_support) {
+				found_queue_family = true;
+				queue_family = i;
+				break;
+			}
+		}
+	}
+	assert(found_queue_family);
+
+	// Check that the physical device supports all extensions
+	uint32_t ext_count = EXT_PROP_BUFFER_SIZE;
+	VkExtensionProperties ext_props[EXT_PROP_BUFFER_SIZE];
+	result = vkEnumerateDeviceExtensionProperties(
+	    ctx->physical_dev, nullptr, &ext_count, ext_props);
+	assert(result == VK_SUCCESS);
+	bool supported[extension_count] = {};
+	for (unsigned i = 0; i < ext_count; ++i) {
+		for (unsigned j = 0; j < extension_count; ++j) {
+			if (strcmp(extensions[j], ext_props[i].extensionName) == 0) {
+				supported[j] = true;
+				break;
+			}
+		}
+	}
+	for (unsigned j = 0; j < extension_count; ++j) {
+		if (!supported[j]) {
+			fprintf(stderr, "Unsupported: %s\n", extensions[j]);
+			assert(false);
+		}
+	}
+
+	// Create the logical device and get the queue handle.
+	float queue_priority = 1.0;
+	const VkDeviceQueueCreateInfo queue_create_info = {
+		.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO,
+		.queueFamilyIndex = queue_family,
+		.queueCount = 1,
+		.pQueuePriorities = &queue_priority,
+	};
+	const VkDeviceCreateInfo dev_create_info = {
+		.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
+		.pQueueCreateInfos = &queue_create_info,
+		.queueCreateInfoCount = 1,
+		.enabledExtensionCount = extension_count,
+		.ppEnabledExtensionNames = extensions,
+	};
+	result = vkCreateDevice(
+	    ctx->physical_dev, &dev_create_info, nullptr, &ctx->dev);
+	assert(result == VK_SUCCESS);
+	vkGetDeviceQueue(ctx->dev, queue_family, 0, &ctx->queue);
+
+	// Select a surface format, preferring R8G8B8A8_SRGB with
+	// SRGB_NONLINEAR colour space.
+	uint32_t surface_fmt_count = SURFACE_FMT_BUFFER_SIZE;
+	VkSurfaceFormatKHR surface_fmts[SURFACE_FMT_BUFFER_SIZE];
+	result = vkGetPhysicalDeviceSurfaceFormatsKHR(
+	    ctx->physical_dev, ctx->surface, &surface_fmt_count, surface_fmts);
+	assert(result == VK_SUCCESS);
+	assert(surface_fmt_count > 0);
+	VkSurfaceFormatKHR surface_fmt = surface_fmts[0];
+	for (unsigned i = 0; i < surface_fmt_count; ++i) {
+		if (surface_fmts[i].format == VK_FORMAT_R8G8B8A8_SRGB
+		    && surface_fmts[i].colorSpace
+		        == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR) {
+			surface_fmt = surface_fmts[i];
+		}
+	}
+
+	// Query surface capabilities
+	VkSurfaceCapabilitiesKHR surface_caps;
+	result = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(
+	    ctx->physical_dev, ctx->surface, &surface_caps);
+	assert(result == VK_SUCCESS);
+
+	// Select swap chain extent
+	if (surface_caps.currentExtent.width == UINT32_MAX) {
+		int width, height;
+		glfwGetFramebufferSize(config->window, &width, &height);
+		ctx->swapchain_extent.width = CLAMP(
+		    (uint32_t)width, surface_caps.minImageExtent.width,
+		    surface_caps.maxImageExtent.width);
+		ctx->swapchain_extent.height = CLAMP(
+		    (uint32_t)height, surface_caps.minImageExtent.height,
+		    surface_caps.maxImageExtent.height);
+	} else {
+		ctx->swapchain_extent = surface_caps.currentExtent;
+	}
+
+	// Select image count
+	uint32_t swapchain_img_count = surface_caps.minImageCount + 1;
+	assert(swapchain_img_count <= SWAPCHAIN_IMG_BUFFER_SIZE);
+	assert(
+	    surface_caps.maxImageCount == 0
+	    || swapchain_img_count <= surface_caps.maxImageCount);
+
+	// Create the swap chain
+	const VkSwapchainCreateInfoKHR swapchain_create_info = {
+		.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR,
+		.surface = ctx->surface,
+		.minImageCount = swapchain_img_count,
+		.imageFormat = surface_fmt.format,
+		.imageColorSpace = surface_fmt.colorSpace,
+		.imageExtent = ctx->swapchain_extent,
+		.imageArrayLayers = 1,
+		.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+		.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE,
+		.preTransform = surface_caps.currentTransform,
+		.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR,
+		.presentMode = VK_PRESENT_MODE_FIFO_KHR,
+		.clipped = VK_TRUE,
+		.oldSwapchain = VK_NULL_HANDLE,
+	};
+	result = vkCreateSwapchainKHR(
+	    ctx->dev, &swapchain_create_info, nullptr, &ctx->swapchain);
+	assert(result == VK_SUCCESS);
+
+	// Retreive swapchain images
+	VkImage swapchain_imgs[SWAPCHAIN_IMG_BUFFER_SIZE];
+	ctx->swapchain_img_count = SWAPCHAIN_IMG_BUFFER_SIZE;
+	result = vkGetSwapchainImagesKHR(
+	    ctx->dev, ctx->swapchain, &swapchain_img_count, swapchain_imgs);
+	assert(result == VK_SUCCESS);
+
+	// Create swapchain image views
+	VkImageViewCreateInfo img_view_create_info = {
+		.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
+		.viewType = VK_IMAGE_VIEW_TYPE_2D,
+		.format = surface_fmt.format,
+		.components = {
+			.r = VK_COMPONENT_SWIZZLE_IDENTITY,
+			.g = VK_COMPONENT_SWIZZLE_IDENTITY,
+			.b = VK_COMPONENT_SWIZZLE_IDENTITY,
+			.a = VK_COMPONENT_SWIZZLE_IDENTITY,
+		},
+		.subresourceRange = {
+			.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
+			.baseMipLevel = 0,
+			.levelCount = 1,
+			.baseArrayLayer = 0,
+			.layerCount = 1,
+		},
+	};
+	for (unsigned i = 0; i < swapchain_img_count; ++i) {
+		img_view_create_info.image = swapchain_imgs[i];
+		result = vkCreateImageView(
+		    ctx->dev, &img_view_create_info, nullptr,
+		    ctx->swapchain_img_views + i);
+		assert(result == VK_SUCCESS);
+	}
+
+	// Load vertex and fragment shader modules
+	ctx->vert_shader
+	    = load_shader_module(ctx->dev, vert_shader, sizeof(vert_shader));
+	ctx->frag_shader
+	    = load_shader_module(ctx->dev, frag_shader, sizeof(frag_shader));
+	const VkPipelineShaderStageCreateInfo shader_stages[] = {
+		{
+		    .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+		    .stage = VK_SHADER_STAGE_VERTEX_BIT,
+		    .module = ctx->vert_shader,
+		    .pName = "main",
+		},
+		{
+		    .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+		    .stage = VK_SHADER_STAGE_FRAGMENT_BIT,
+		    .module = ctx->frag_shader,
+		    .pName = "main",
+		},
+	};
+
+	// Set up input configuration
+	const VkVertexInputBindingDescription input_binding_descs[] = {
+		{
+		    .binding = 0,
+		    .stride = sizeof(vertex_t),
+		    .inputRate = VK_VERTEX_INPUT_RATE_VERTEX,
+		},
+	};
+	const VkVertexInputAttributeDescription input_attribute_descs[] = {
+		{
+		    .binding = 0,
+		    .location = 0,
+		    .format = VK_FORMAT_R32G32_SFLOAT,
+		    .offset = offsetof(vertex_t, position),
+		},
+		{
+		    .binding = 0,
+		    .location = 1,
+		    .format = VK_FORMAT_R32G32B32_SFLOAT,
+		    .offset = offsetof(vertex_t, colour),
+		},
+	};
+	const VkPipelineVertexInputStateCreateInfo vertex_input_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
+		.vertexBindingDescriptionCount = NELEMS(input_binding_descs),
+		.pVertexBindingDescriptions = input_binding_descs,
+		.vertexAttributeDescriptionCount = NELEMS(input_attribute_descs),
+		.pVertexAttributeDescriptions = input_attribute_descs,
+	};
+	const VkPipelineInputAssemblyStateCreateInfo input_assembly_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
+		.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP,
+	};
+
+	// Set up viewport configuration
+	const VkViewport viewport = {
+		.width = (float)ctx->swapchain_extent.width,
+		.height = (float)ctx->swapchain_extent.height,
+	};
+	const VkRect2D scissor = { .extent = ctx->swapchain_extent };
+	VkPipelineViewportStateCreateInfo viewport_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
+		.viewportCount = 1,
+		.pViewports = &viewport,
+		.scissorCount = 1,
+		.pScissors = &scissor,
+	};
+
+	// Populate rasterizer configuration
+	const VkPipelineRasterizationStateCreateInfo rasterizer_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
+		.depthClampEnable = VK_FALSE,
+		.rasterizerDiscardEnable = VK_FALSE,
+		.polygonMode = VK_POLYGON_MODE_FILL,
+		.lineWidth = 1.0f,
+		.cullMode = VK_CULL_MODE_NONE,
+	};
+
+	// Populate multisampling configuration
+	const VkPipelineMultisampleStateCreateInfo multisampling_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO,
+		.sampleShadingEnable = VK_FALSE,
+		.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT,
+	};
+
+	// Set up colour blending configuration
+	const VkPipelineColorBlendAttachmentState colour_blend_attatchment = {
+		.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT
+		    | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT,
+		.blendEnable = VK_FALSE,
+	};
+	const VkPipelineColorBlendStateCreateInfo colour_blend_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,
+		.logicOpEnable = VK_FALSE,
+		.attachmentCount = 1,
+		.pAttachments = &colour_blend_attatchment,
+	};
+
+	// Create pipeline layout
+	const VkPipelineLayoutCreateInfo pipeline_layout_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
+		.pushConstantRangeCount = 0,
+	};
+	result = vkCreatePipelineLayout(
+	    ctx->dev, &pipeline_layout_config, nullptr, &ctx->pipeline_layout);
+	assert(result == VK_SUCCESS);
+
+	// Set up colour attachment
+	const VkAttachmentDescription colour_attachment = {
+		.format = surface_fmt.format,
+		.samples = VK_SAMPLE_COUNT_1_BIT,
+		.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR,
+		.storeOp = VK_ATTACHMENT_STORE_OP_STORE,
+		.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+		.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE,
+		.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED,
+		.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
+	};
+	const VkAttachmentReference colour_attachment_ref = {
+		.attachment = 0,
+		.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+	};
+	const VkSubpassDescription subpass = {
+		.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS,
+		.colorAttachmentCount = 1,
+		.pColorAttachments = &colour_attachment_ref,
+	};
+
+	// Create render pass
+	const VkSubpassDependency dependency = {
+		.srcSubpass = VK_SUBPASS_EXTERNAL,
+		.dstSubpass = 0,
+		.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
+		.srcAccessMask = 0,
+		.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
+		.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
+	};
+	const VkRenderPassCreateInfo render_pass_config = {
+		.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO,
+		.attachmentCount = 1,
+		.pAttachments = &colour_attachment,
+		.subpassCount = 1,
+		.pSubpasses = &subpass,
+		.dependencyCount = 1,
+		.pDependencies = &dependency,
+	};
+	result = vkCreateRenderPass(
+	    ctx->dev, &render_pass_config, nullptr, &ctx->render_pass);
+	assert(result == VK_SUCCESS);
+
+	// Create pipeline
+	const VkGraphicsPipelineCreateInfo pipeline_config = {
+		.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
+		.stageCount = 2,
+		.pStages = shader_stages,
+		.pVertexInputState = &vertex_input_config,
+		.pInputAssemblyState = &input_assembly_config,
+		.pViewportState = &viewport_config,
+		.pRasterizationState = &rasterizer_config,
+		.pMultisampleState = &multisampling_config,
+		.pColorBlendState = &colour_blend_config,
+		.layout = ctx->pipeline_layout,
+		.renderPass = ctx->render_pass,
+		.subpass = 0,
+	};
+	result = vkCreateGraphicsPipelines(
+	    ctx->dev, VK_NULL_HANDLE, 1, &pipeline_config, nullptr,
+	    &ctx->pipeline);
+	assert(result == VK_SUCCESS);
+
+	// Create framebuffers
+	for (unsigned i = 0; i < swapchain_img_count; ++i) {
+		const VkFramebufferCreateInfo framebuffer_config = {
+			.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,
+			.renderPass = ctx->render_pass,
+			.attachmentCount = 1,
+			.pAttachments = ctx->swapchain_img_views + i,
+			.width = ctx->swapchain_extent.width,
+			.height = ctx->swapchain_extent.height,
+			.layers = 1,
+		};
+		result = vkCreateFramebuffer(
+		    ctx->dev, &framebuffer_config, nullptr, ctx->framebuffers + i);
+		assert(result == VK_SUCCESS);
+	}
+
+	// Create vertex buffer
+	ctx->vertex_data_size = config->vertex_data_size;
+	const VkBufferCreateInfo vertex_buf_config = {
+		.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
+		.size = ctx->vertex_data_size,
+		.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
+		.sharingMode = VK_SHARING_MODE_EXCLUSIVE,
+	};
+	result = vkCreateBuffer(
+	    ctx->dev, &vertex_buf_config, nullptr, &ctx->vertex_buf);
+	assert(result == VK_SUCCESS);
+
+	// Allocate memory to vertex buffer
+	const VkMemoryPropertyFlags mem_flags
+	    = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
+	    | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
+	VkMemoryRequirements mem_requirements;
+	vkGetBufferMemoryRequirements(
+	    ctx->dev, ctx->vertex_buf, &mem_requirements);
+	VkPhysicalDeviceMemoryProperties mem_props;
+	vkGetPhysicalDeviceMemoryProperties(ctx->physical_dev, &mem_props);
+	uint32_t mem_type = UINT32_MAX;
+	for (unsigned i = 0; i < mem_props.memoryTypeCount; ++i) {
+		const bool valid_type
+		    = (mem_requirements.memoryTypeBits & (1 << i)) != 0;
+		const bool has_flags
+		    = (mem_props.memoryTypes[i].propertyFlags & mem_flags)
+		    == mem_flags;
+		if (valid_type && has_flags) {
+			mem_type = i;
+			break;
+		}
+	}
+	assert(mem_type != UINT32_MAX);
+	VkMemoryAllocateInfo allocate_config = {
+		.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
+		.allocationSize = mem_requirements.size,
+		.memoryTypeIndex = mem_type,
+	};
+	result = vkAllocateMemory(
+	    ctx->dev, &allocate_config, nullptr, &ctx->vertex_buf_mem);
+	assert(result == VK_SUCCESS);
+	vkBindBufferMemory(ctx->dev, ctx->vertex_buf, ctx->vertex_buf_mem, 0);
+
+	// Copy vertex data into vertex buffer
+	void *vertex_buf_ptr;
+	vkMapMemory(
+	    ctx->dev, ctx->vertex_buf_mem, 0, ctx->vertex_data_size, 0,
+	    &vertex_buf_ptr);
+	memcpy(vertex_buf_ptr, config->vertex_data, ctx->vertex_data_size);
+	vkUnmapMemory(ctx->dev, ctx->vertex_buf_mem);
+
+	// Create command pool
+	const VkCommandPoolCreateInfo cmd_pool_config = {
+		.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
+		.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
+		.queueFamilyIndex = queue_family,
+	};
+	result = vkCreateCommandPool(
+	    ctx->dev, &cmd_pool_config, nullptr, &ctx->cmd_pool);
+	assert(result == VK_SUCCESS);
+
+	// Allocate command buffer
+	const VkCommandBufferAllocateInfo cmd_buf_config = {
+		.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
+		.commandPool = ctx->cmd_pool,
+		.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
+		.commandBufferCount = 1,
+	};
+	result
+	    = vkAllocateCommandBuffers(ctx->dev, &cmd_buf_config, &ctx->cmd_buf);
+	assert(result == VK_SUCCESS);
+
+	// Create syncronisation primitives
+	VkSemaphoreCreateInfo semaphore_config = {
+		.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO,
+	};
+	result = vkCreateSemaphore(
+	    ctx->dev, &semaphore_config, nullptr, &ctx->img_avail);
+	assert(result == VK_SUCCESS);
+	result = vkCreateSemaphore(
+	    ctx->dev, &semaphore_config, nullptr, &ctx->render_fin);
+	assert(result == VK_SUCCESS);
+	VkFenceCreateInfo fence_config = {
+		.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO,
+		.flags = VK_FENCE_CREATE_SIGNALED_BIT,
+	};
+	result
+	    = vkCreateFence(ctx->dev, &fence_config, nullptr, &ctx->in_flight);
+	assert(result == VK_SUCCESS);
+}
+
+void gpu_cleanup(const gpu_ctx_t *ctx)
+{
+	vkDeviceWaitIdle(ctx->dev);
+
+	vkDestroySemaphore(ctx->dev, ctx->img_avail, nullptr);
+	vkDestroySemaphore(ctx->dev, ctx->render_fin, nullptr);
+	vkDestroyFence(ctx->dev, ctx->in_flight, nullptr);
+	vkDestroyCommandPool(ctx->dev, ctx->cmd_pool, nullptr);
+	vkDestroyPipeline(ctx->dev, ctx->pipeline, nullptr);
+	vkDestroyRenderPass(ctx->dev, ctx->render_pass, nullptr);
+	vkDestroyPipelineLayout(ctx->dev, ctx->pipeline_layout, nullptr);
+	vkDestroyShaderModule(ctx->dev, ctx->vert_shader, nullptr);
+	vkDestroyShaderModule(ctx->dev, ctx->frag_shader, nullptr);
+	for (unsigned i = 0; i < ctx->swapchain_img_count; ++i) {
+		vkDestroyFramebuffer(ctx->dev, ctx->framebuffers[i], nullptr);
+		vkDestroyImageView(ctx->dev, ctx->swapchain_img_views[i], nullptr);
+	}
+	vkDestroySwapchainKHR(ctx->dev, ctx->swapchain, nullptr);
+	vkDestroyBuffer(ctx->dev, ctx->vertex_buf, nullptr);
+	vkFreeMemory(ctx->dev, ctx->vertex_buf_mem, nullptr);
+	vkDestroyDevice(ctx->dev, nullptr);
+	vkDestroySurfaceKHR(ctx->inst, ctx->surface, nullptr);
+	vkDestroyInstance(ctx->inst, nullptr);
+}
+
+void gpu_render(const gpu_ctx_t *ctx)
+{
+	VkResult result;
+
+	// Wait for previous frame to finish
+	vkWaitForFences(ctx->dev, 1, &ctx->in_flight, VK_TRUE, UINT64_MAX);
+	vkResetFences(ctx->dev, 1, &ctx->in_flight);
+
+	// Aquire image from swapchain
+	uint32_t img_index;
+	result = vkAcquireNextImageKHR(
+	    ctx->dev, ctx->swapchain, UINT64_MAX, ctx->img_avail, VK_NULL_HANDLE,
+	    &img_index);
+	assert(result == VK_SUCCESS);
+
+	// Reset command buffer, then begin writing
+	vkResetCommandBuffer(ctx->cmd_buf, 0);
+	const VkCommandBufferBeginInfo cmd_begin = {
+		.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
+	};
+	result = vkBeginCommandBuffer(ctx->cmd_buf, &cmd_begin);
+	assert(result == VK_SUCCESS);
+
+	// Start render pass
+	VkClearValue clear_value = { { { 0.0, 0.0, 0.0, 1.0 } } };
+	VkRenderPassBeginInfo render_pass_begin = {
+		.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
+		.renderPass = ctx->render_pass,
+		.framebuffer = ctx->framebuffers[img_index],
+		.renderArea.extent = ctx->swapchain_extent,
+		.clearValueCount = 1,
+		.pClearValues = &clear_value,
+	};
+	vkCmdBeginRenderPass(
+	    ctx->cmd_buf, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
+
+	// Bind graphics pipeline and vertex buffer, then draw
+	vkCmdBindPipeline(
+	    ctx->cmd_buf, VK_PIPELINE_BIND_POINT_GRAPHICS, ctx->pipeline);
+	vkCmdBindVertexBuffers(
+	    ctx->cmd_buf, 0, 1, &ctx->vertex_buf, &(VkDeviceSize) { 0 });
+	vkCmdDraw(
+	    ctx->cmd_buf, ctx->vertex_data_size / sizeof(vertex_t), 1, 0, 0);
+
+	// Finish render pass and end writing to command buffer
+	vkCmdEndRenderPass(ctx->cmd_buf);
+	result = vkEndCommandBuffer(ctx->cmd_buf);
+	assert(result == VK_SUCCESS);
+
+	// Submit command buffer
+	VkPipelineStageFlags wait_stage
+	    = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+	const VkSubmitInfo submit = {
+		.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO,
+		.waitSemaphoreCount = 1,
+		.pWaitSemaphores = &ctx->img_avail,
+		.pWaitDstStageMask = &wait_stage,
+		.commandBufferCount = 1,
+		.pCommandBuffers = &ctx->cmd_buf,
+		.signalSemaphoreCount = 1,
+		.pSignalSemaphores = &ctx->render_fin,
+	};
+	result = vkQueueSubmit(ctx->queue, 1, &submit, ctx->in_flight);
+	assert(result == VK_SUCCESS);
+
+	// Present frame
+	const VkPresentInfoKHR present_info = {
+		.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR,
+		.waitSemaphoreCount = 1,
+		.pWaitSemaphores = &ctx->render_fin,
+		.swapchainCount = 1,
+		.pSwapchains = &ctx->swapchain,
+		.pImageIndices = &img_index,
+	};
+	result = vkQueuePresentKHR(ctx->queue, &present_info);
+	assert(result == VK_SUCCESS);
+}