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Nuklear/demo/sdl_vulkan/main.c

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demo/backend: add vulkan SDL backend and demo Based on other SDL demos and GLFW Vulkan demo.
2024-10-05 16:39:00 +03:00
/* nuklear - 1.32.0 - public domain */
#include <limits.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_vulkan.h>
#include <vulkan/vulkan.h>
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_STANDARD_IO
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
#define NK_INCLUDE_FONT_BAKING
#define NK_INCLUDE_DEFAULT_FONT
#define NK_IMPLEMENTATION
#define NK_SDL_VULKAN_IMPLEMENTATION
#define NK_KEYSTATE_BASED_INPUT
#include "../../nuklear.h"
#include "nuklear_sdl_vulkan.h"
#define WINDOW_WIDTH 1200
#define WINDOW_HEIGHT 800
#define MAX_VERTEX_BUFFER 512 * 1024
#define MAX_ELEMENT_BUFFER 128 * 1024
/* ===============================================================
*
* EXAMPLE
*
* ===============================================================*/
/* This are some code examples to provide a small overview of what can be
* done with this library. To try out an example uncomment the defines */
/* #define INCLUDE_ALL */
/* #define INCLUDE_STYLE */
/* #define INCLUDE_CALCULATOR */
/* #define INCLUDE_CANVAS */
/* #define INCLUDE_OVERVIEW */
/* #define INCLUDE_NODE_EDITOR */
#ifdef INCLUDE_ALL
#define INCLUDE_STYLE
#define INCLUDE_CALCULATOR
#define INCLUDE_CANVAS
#define INCLUDE_OVERVIEW
#define INCLUDE_NODE_EDITOR
#endif
#ifdef INCLUDE_STYLE
#include "../../demo/common/style.c"
#endif
#ifdef INCLUDE_CALCULATOR
#include "../../demo/common/calculator.c"
#endif
#ifdef INCLUDE_CANVAS
#include "../../demo/common/canvas.c"
#endif
#ifdef INCLUDE_OVERVIEW
#include "../../demo/common/overview.c"
#endif
#ifdef INCLUDE_NODE_EDITOR
#include "../../demo/common/node_editor.c"
#endif
/* ===============================================================
*
* DEMO
*
* ===============================================================*/
static const char *validation_layer_name = "VK_LAYER_KHRONOS_validation";
struct queue_family_indices {
int graphics;
int present;
};
struct swap_chain_support_details {
VkSurfaceCapabilitiesKHR capabilities;
VkSurfaceFormatKHR *formats;
uint32_t formats_len;
VkPresentModeKHR *present_modes;
uint32_t present_modes_len;
};
void swap_chain_support_details_free(
struct swap_chain_support_details *swap_chain_support) {
if (swap_chain_support->formats_len > 0) {
free(swap_chain_support->formats);
swap_chain_support->formats = NULL;
}
if (swap_chain_support->present_modes_len > 0) {
free(swap_chain_support->present_modes);
swap_chain_support->present_modes = NULL;
}
}
struct vulkan_demo {
SDL_Window *win;
VkInstance instance;
VkDebugUtilsMessengerEXT debug_messenger;
VkSurfaceKHR surface;
VkPhysicalDevice physical_device;
struct queue_family_indices indices;
VkDevice device;
VkQueue graphics_queue;
VkQueue present_queue;
VkSampler sampler;
VkSwapchainKHR swap_chain;
VkImage *swap_chain_images;
uint32_t swap_chain_images_len;
VkImageView *swap_chain_image_views;
VkFormat swap_chain_image_format;
VkExtent2D swap_chain_image_extent;
VkImage *overlay_images;
VkImageView *overlay_image_views;
VkDeviceMemory *overlay_image_memories;
VkRenderPass render_pass;
VkFramebuffer *framebuffers;
VkDescriptorSetLayout descriptor_set_layout;
VkDescriptorPool descriptor_pool;
VkDescriptorSet *descriptor_sets;
VkPipelineLayout pipeline_layout;
VkPipeline pipeline;
VkCommandPool command_pool;
VkCommandBuffer *command_buffers;
VkSemaphore image_available;
VkSemaphore render_finished;
VkImage demo_texture_image;
VkImageView demo_texture_image_view;
VkDeviceMemory demo_texture_memory;
VkFence render_fence;
};
VKAPI_ATTR VkBool32 VKAPI_CALL
vulkan_debug_callback(VkDebugUtilsMessageSeverityFlagBitsEXT message_severity,
VkDebugUtilsMessageTypeFlagsEXT message_type,
const VkDebugUtilsMessengerCallbackDataEXT *callback_data,
void *user_data) {
(void)message_severity;
(void)message_type;
(void)user_data;
fprintf(stderr, "validation layer: %s\n", callback_data->pMessage);
return VK_FALSE;
}
bool check_validation_layer_support() {
uint32_t layer_count;
bool ret = false;
VkResult result;
uint32_t i;
VkLayerProperties *available_layers = NULL;
result = vkEnumerateInstanceLayerProperties(&layer_count, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumerateInstanceLayerProperties failed: %d\n",
result);
return ret;
}
available_layers = malloc(layer_count * sizeof(VkLayerProperties));
result = vkEnumerateInstanceLayerProperties(&layer_count, available_layers);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumerateInstanceLayerProperties failed: %d\n",
result);
goto cleanup;
}
printf("Available vulkan layers:\n");
for (i = 0; i < layer_count; i++) {
printf(" %s\n", available_layers[i].layerName);
if (strcmp(validation_layer_name, available_layers[i].layerName) == 0) {
ret = true;
break;
}
}
cleanup:
free(available_layers);
return ret;
}
VkResult create_debug_utils_messenger_ext(
VkInstance instance, const VkDebugUtilsMessengerCreateInfoEXT *pCreateInfo,
const VkAllocationCallbacks *pAllocator,
VkDebugUtilsMessengerEXT *pDebugMessenger) {
PFN_vkCreateDebugUtilsMessengerEXT func =
(PFN_vkCreateDebugUtilsMessengerEXT)vkGetInstanceProcAddr(
instance, "vkCreateDebugUtilsMessengerEXT");
if (func != NULL) {
return func(instance, pCreateInfo, pAllocator, pDebugMessenger);
} else {
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
}
bool create_debug_callback(struct vulkan_demo *demo) {
VkResult result;
VkDebugUtilsMessengerCreateInfoEXT create_info;
memset(&create_info, 0, sizeof(VkDebugUtilsMessengerCreateInfoEXT));
create_info.sType = VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT;
create_info.messageSeverity =
VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT |
VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT;
create_info.messageType = VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT |
VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT |
VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT;
create_info.pfnUserCallback = vulkan_debug_callback;
result = create_debug_utils_messenger_ext(demo->instance, &create_info,
NULL, &demo->debug_messenger);
if (result != VK_SUCCESS) {
fprintf(stderr, "create_debug_utils_messenger_ext failed %d\n", result);
return false;
}
return true;
}
bool create_instance(struct vulkan_demo *demo) {
uint32_t i;
uint32_t available_instance_extension_count;
VkResult result;
VkExtensionProperties *available_instance_extensions = NULL;
bool ret = false;
VkApplicationInfo app_info;
VkInstanceCreateInfo create_info;
uint32_t sdl_extension_count;
uint32_t enabled_extension_count;
const char **enabled_extensions = NULL;
bool validation_layers_installed;
validation_layers_installed = check_validation_layer_support();
if (!validation_layers_installed) {
fprintf(stdout,
"Couldn't find validation layer %s. Continuing without "
"validation layers.\n",
validation_layer_name);
}
result = vkEnumerateInstanceExtensionProperties(
NULL, &available_instance_extension_count, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumerateInstanceExtensionProperties failed %d\n",
result);
return ret;
}
available_instance_extensions = malloc(available_instance_extension_count *
sizeof(VkExtensionProperties));
result = vkEnumerateInstanceExtensionProperties(
NULL, &available_instance_extension_count,
available_instance_extensions);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumerateInstanceExtensionProperties failed %d\n",
result);
goto cleanup;
}
printf("available instance extensions:\n");
for (i = 0; i < available_instance_extension_count; i++) {
printf(" %s\n", available_instance_extensions[i].extensionName);
}
if (SDL_Vulkan_GetInstanceExtensions(demo->win, &sdl_extension_count,
NULL) != SDL_TRUE) {
fprintf(stderr, "SDL_Vulkan_GetInstanceExtensions failed: %s\n",
SDL_GetError());
goto cleanup;
}
enabled_extension_count =
sdl_extension_count + (validation_layers_installed ? 1 : 0);
enabled_extensions = malloc(enabled_extension_count * sizeof(char *));
if (SDL_Vulkan_GetInstanceExtensions(demo->win, &sdl_extension_count,
enabled_extensions) != SDL_TRUE) {
fprintf(stderr, "SDL_Vulkan_GetInstanceExtensions failed: %s\n",
SDL_GetError());
goto cleanup;
}
if (validation_layers_installed) {
enabled_extensions[sdl_extension_count] =
VK_EXT_DEBUG_UTILS_EXTENSION_NAME;
}
printf("Trying to enable the following instance extensions: ");
for (i = 0; i < enabled_extension_count; i++) {
if (i > 0) {
printf(", ");
}
printf("%s\n", enabled_extensions[i]);
}
printf("\n");
for (i = 0; i < enabled_extension_count; i++) {
int extension_missing = 1;
uint32_t j;
for (j = 0; j < available_instance_extension_count; j++) {
if (strcmp(enabled_extensions[i],
available_instance_extensions[j].extensionName) == 0) {
extension_missing = 0;
break;
}
}
if (extension_missing) {
fprintf(stderr, "Extension %s is missing\n", enabled_extensions[i]);
return ret;
}
}
memset(&app_info, 0, sizeof(VkApplicationInfo));
app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
app_info.pApplicationName = "Demo";
app_info.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
app_info.pEngineName = "No Engine";
app_info.engineVersion = VK_MAKE_VERSION(1, 0, 0);
app_info.apiVersion = VK_API_VERSION_1_0;
memset(&create_info, 0, sizeof(VkInstanceCreateInfo));
create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
create_info.pApplicationInfo = &app_info;
create_info.enabledExtensionCount = enabled_extension_count;
create_info.ppEnabledExtensionNames = enabled_extensions;
if (validation_layers_installed) {
create_info.enabledLayerCount = 1;
create_info.ppEnabledLayerNames = &validation_layer_name;
}
result = vkCreateInstance(&create_info, NULL, &demo->instance);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateInstance result %d\n", result);
return ret;
}
if (validation_layers_installed) {
ret = create_debug_callback(demo);
} else {
ret = true;
}
cleanup:
if (available_instance_extensions) {
free(available_instance_extensions);
}
if (enabled_extensions) {
free(enabled_extensions);
}
return ret;
}
bool create_surface(struct vulkan_demo *demo) {
SDL_bool result;
result =
SDL_Vulkan_CreateSurface(demo->win, demo->instance, &demo->surface);
if (result != SDL_TRUE) {
fprintf(stderr, "creating vulkan surface failed: %s\n", SDL_GetError());
return false;
}
return true;
}
bool find_queue_families(VkPhysicalDevice physical_device, VkSurfaceKHR surface,
struct queue_family_indices *indices) {
VkResult result;
uint32_t queue_family_count = 0;
uint32_t i = 0;
bool ret = false;
VkQueueFamilyProperties *queue_family_properties;
VkBool32 present_support;
vkGetPhysicalDeviceQueueFamilyProperties(physical_device,
&queue_family_count, NULL);
queue_family_properties =
malloc(queue_family_count * sizeof(VkQueueFamilyProperties));
vkGetPhysicalDeviceQueueFamilyProperties(
physical_device, &queue_family_count, queue_family_properties);
for (i = 0; i < queue_family_count; i++) {
if (queue_family_properties[i].queueCount == 0) {
continue;
}
if (queue_family_properties[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) {
indices->graphics = i;
}
result = vkGetPhysicalDeviceSurfaceSupportKHR(
physical_device, i, surface, &present_support);
if (result != VK_SUCCESS) {
fprintf(stderr,
"vkGetPhysicalDeviceSurfaceSupportKHR failed with %d\n",
result);
goto cleanup;
}
if (present_support == VK_TRUE) {
indices->present = i;
}
if (indices->graphics >= 0 && indices->present >= 0) {
break;
}
}
ret = true;
cleanup:
free(queue_family_properties);
return ret;
}
bool query_swap_chain_support(
VkPhysicalDevice device, VkSurfaceKHR surface,
struct swap_chain_support_details *swap_chain_support) {
VkResult result;
result = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(
device, surface, &swap_chain_support->capabilities);
if (result != VK_SUCCESS) {
fprintf(stderr,
"vkGetPhysicalDeviceSurfaceCapabilitiesKHR failed: %d\n",
result);
return false;
}
result = vkGetPhysicalDeviceSurfaceFormatsKHR(
device, surface, &swap_chain_support->formats_len, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkGetPhysicalDeviceSurfaceFormatsKHR failed: %d\n",
result);
return false;
}
if (swap_chain_support->formats_len != 0) {
swap_chain_support->formats = malloc(swap_chain_support->formats_len *
sizeof(VkSurfaceFormatKHR));
result = vkGetPhysicalDeviceSurfaceFormatsKHR(
device, surface, &swap_chain_support->formats_len,
swap_chain_support->formats);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkGetPhysicalDeviceSurfaceFormatsKHR failed: %d\n",
result);
return false;
}
}
result = vkGetPhysicalDeviceSurfacePresentModesKHR(
device, surface, &swap_chain_support->present_modes_len, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr,
"vkGetPhysicalDeviceSurfacePresentModesKHR failed: %d\n",
result);
return false;
}
if (swap_chain_support->present_modes_len != 0) {
swap_chain_support->present_modes = malloc(
swap_chain_support->present_modes_len * sizeof(VkPresentModeKHR));
result = vkGetPhysicalDeviceSurfacePresentModesKHR(
device, surface, &swap_chain_support->present_modes_len,
swap_chain_support->present_modes);
if (result != VK_SUCCESS) {
fprintf(stderr,
"vkGetPhysicalDeviceSurfacePresentModesKHR failed: %d\n",
result);
return false;
}
}
return true;
}
bool is_suitable_physical_device(VkPhysicalDevice physical_device,
VkSurfaceKHR surface,
struct queue_family_indices *indices) {
VkResult result;
uint32_t device_extension_count;
uint32_t i;
VkExtensionProperties *device_extensions;
bool ret = false;
struct swap_chain_support_details swap_chain_support;
int found_khr_surface = 0;
VkPhysicalDeviceProperties device_properties;
vkGetPhysicalDeviceProperties(physical_device, &device_properties);
printf("Probing physical device %s\n", device_properties.deviceName);
result = vkEnumerateDeviceExtensionProperties(
physical_device, NULL, &device_extension_count, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumerateDeviceExtensionProperties failed: %d\n",
result);
return false;
}
device_extensions =
malloc(device_extension_count * sizeof(VkExtensionProperties));
result = vkEnumerateDeviceExtensionProperties(
physical_device, NULL, &device_extension_count, device_extensions);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumerateDeviceExtensionProperties failed: %d\n",
result);
goto cleanup;
}
printf(" Supported device extensions:\n");
for (i = 0; i < device_extension_count; i++) {
printf(" %s\n", device_extensions[i].extensionName);
if (strcmp(VK_KHR_SWAPCHAIN_EXTENSION_NAME,
device_extensions[i].extensionName) == 0) {
found_khr_surface = 1;
break;
}
}
if (!found_khr_surface) {
printf(" Device doesnt support %s\n", VK_KHR_SWAPCHAIN_EXTENSION_NAME);
goto cleanup;
}
if (!find_queue_families(physical_device, surface, indices)) {
goto cleanup;
}
if (indices->graphics < 0 || indices->present < 0) {
printf(" Device is missing graphics and/or present support. graphics: "
"%d, present: %d\n",
indices->graphics, indices->present);
goto cleanup;
}
if (!query_swap_chain_support(physical_device, surface,
&swap_chain_support)) {
goto cleanup;
}
if (swap_chain_support.formats_len == 0) {
printf(" Device doesn't support any swap chain formats\n");
goto cleanup;
}
if (swap_chain_support.present_modes_len == 0) {
printf(" Device doesn't support any swap chain present modes\n");
goto cleanup;
}
ret = true;
cleanup:
free(device_extensions);
swap_chain_support_details_free(&swap_chain_support);
return ret;
}
bool create_physical_device(struct vulkan_demo *demo) {
uint32_t device_count = 0;
VkPhysicalDevice *physical_devices;
VkResult result;
uint32_t i;
bool ret = false;
result = vkEnumeratePhysicalDevices(demo->instance, &device_count, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumeratePhysicalDevices failed: %d\n", result);
return ret;
}
if (device_count == 0) {
fprintf(stderr, "no vulkan capable GPU found!");
return ret;
}
physical_devices = malloc(device_count * sizeof(VkPhysicalDevice));
result = vkEnumeratePhysicalDevices(demo->instance, &device_count,
physical_devices);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEnumeratePhysicalDevices failed: %d\n", result);
goto cleanup;
}
for (i = 0; i < device_count; i++) {
struct queue_family_indices indices = {-1, -1};
if (is_suitable_physical_device(physical_devices[i], demo->surface,
&indices)) {
printf(" Selecting this device for rendering. Queue families: "
"graphics: %d, present: %d!\n",
indices.graphics, indices.present);
demo->physical_device = physical_devices[i];
demo->indices = indices;
break;
}
}
if (demo->physical_device == NULL) {
fprintf(stderr, "failed to find a suitable GPU!\n");
} else {
ret = true;
}
cleanup:
free(physical_devices);
return ret;
}
bool create_logical_device(struct vulkan_demo *demo) {
VkResult result;
bool ret = false;
float queuePriority = 1.0f;
uint32_t num_queues = 1;
VkDeviceQueueCreateInfo *queue_create_infos;
VkDeviceCreateInfo create_info;
const char *swap_chain_extension_name = VK_KHR_SWAPCHAIN_EXTENSION_NAME;
queue_create_infos = calloc(2, sizeof(VkDeviceQueueCreateInfo));
queue_create_infos[0].sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
queue_create_infos[0].queueFamilyIndex = demo->indices.graphics;
queue_create_infos[0].queueCount = 1;
queue_create_infos[0].pQueuePriorities = &queuePriority;
if (demo->indices.present != demo->indices.graphics) {
queue_create_infos[1].sType =
VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
queue_create_infos[1].queueFamilyIndex = demo->indices.present;
queue_create_infos[1].queueCount = 1;
queue_create_infos[1].pQueuePriorities = &queuePriority;
num_queues = 2;
}
memset(&create_info, 0, sizeof(VkDeviceCreateInfo));
create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
create_info.queueCreateInfoCount = num_queues;
create_info.pQueueCreateInfos = queue_create_infos;
create_info.enabledExtensionCount = 1;
create_info.ppEnabledExtensionNames = &swap_chain_extension_name;
result = vkCreateDevice(demo->physical_device, &create_info, NULL,
&demo->device);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateDevice failed: %d\n", result);
goto cleanup;
}
vkGetDeviceQueue(demo->device, demo->indices.graphics, 0,
&demo->graphics_queue);
vkGetDeviceQueue(demo->device, demo->indices.present, 0,
&demo->present_queue);
ret = true;
cleanup:
free(queue_create_infos);
return ret;
}
bool create_sampler(struct vulkan_demo *demo) {
VkResult result;
VkSamplerCreateInfo sampler_info;
memset(&sampler_info, 0, sizeof(VkSamplerCreateInfo));
sampler_info.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
sampler_info.pNext = NULL;
sampler_info.maxAnisotropy = 1.0;
sampler_info.magFilter = VK_FILTER_LINEAR;
sampler_info.minFilter = VK_FILTER_LINEAR;
sampler_info.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
sampler_info.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;
sampler_info.addressModeV = VK_SAMPLER_ADDRESS_MODE_REPEAT;
sampler_info.addressModeW = VK_SAMPLER_ADDRESS_MODE_REPEAT;
sampler_info.mipLodBias = 0.0f;
sampler_info.compareEnable = VK_FALSE;
sampler_info.compareOp = VK_COMPARE_OP_ALWAYS;
sampler_info.minLod = 0.0f;
sampler_info.maxLod = 0.0f;
sampler_info.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_BLACK;
result = vkCreateSampler(demo->device, &sampler_info, NULL, &demo->sampler);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateSampler failed: %d\n", result);
return false;
}
return true;
}
VkSurfaceFormatKHR
choose_swap_surface_format(VkSurfaceFormatKHR *available_formats,
uint32_t available_formats_len) {
VkSurfaceFormatKHR undefined_format = {VK_FORMAT_B8G8R8A8_UNORM,
VK_COLOR_SPACE_SRGB_NONLINEAR_KHR};
uint32_t i;
if (available_formats_len == 1 &&
available_formats[0].format == VK_FORMAT_UNDEFINED) {
return undefined_format;
}
for (i = 0; i < available_formats_len; i++) {
if (available_formats[i].format == VK_FORMAT_B8G8R8A8_UNORM &&
available_formats[i].colorSpace ==
VK_COLOR_SPACE_SRGB_NONLINEAR_KHR) {
return available_formats[i];
}
}
return available_formats[0];
}
VkPresentModeKHR
choose_swap_present_mode(VkPresentModeKHR *available_present_modes,
uint32_t available_present_modes_len) {
uint32_t i;
for (i = 0; i < available_present_modes_len; i++) {
/*
best mode to ensure good input latency while ensuring we are not
producing tearing
*/
if (available_present_modes[i] == VK_PRESENT_MODE_MAILBOX_KHR) {
return available_present_modes[i];
}
}
/* must be supported */
return VK_PRESENT_MODE_FIFO_KHR;
}
VkExtent2D choose_swap_extent(struct vulkan_demo *demo,
VkSurfaceCapabilitiesKHR *capabilities) {
int width, height;
VkExtent2D actual_extent;
if (capabilities->currentExtent.width != 0xFFFFFFFF) {
return capabilities->currentExtent;
} else {
/* not window size! */
SDL_Vulkan_GetDrawableSize(demo->win, &width, &height);
actual_extent.width = (uint32_t)width;
actual_extent.height = (uint32_t)height;
actual_extent.width = NK_MAX(
capabilities->minImageExtent.width,
NK_MIN(capabilities->maxImageExtent.width, actual_extent.width));
actual_extent.height = NK_MAX(
capabilities->minImageExtent.height,
NK_MIN(capabilities->maxImageExtent.height, actual_extent.height));
return actual_extent;
}
}
bool create_swap_chain(struct vulkan_demo *demo) {
struct swap_chain_support_details swap_chain_support;
VkSurfaceFormatKHR surface_format;
VkPresentModeKHR present_mode;
VkExtent2D extent;
VkResult result;
VkSwapchainCreateInfoKHR create_info;
uint32_t queue_family_indices[2];
bool ret = false;
queue_family_indices[0] = (uint32_t)demo->indices.graphics;
queue_family_indices[1] = (uint32_t)demo->indices.present;
if (!query_swap_chain_support(demo->physical_device, demo->surface,
&swap_chain_support)) {
goto cleanup;
}
surface_format = choose_swap_surface_format(swap_chain_support.formats,
swap_chain_support.formats_len);
present_mode = choose_swap_present_mode(
swap_chain_support.present_modes, swap_chain_support.present_modes_len);
extent = choose_swap_extent(demo, &swap_chain_support.capabilities);
demo->swap_chain_images_len =
swap_chain_support.capabilities.minImageCount + 1;
if (swap_chain_support.capabilities.maxImageCount > 0 &&
demo->swap_chain_images_len >
swap_chain_support.capabilities.maxImageCount) {
demo->swap_chain_images_len =
swap_chain_support.capabilities.maxImageCount;
}
memset(&create_info, 0, sizeof(VkSwapchainCreateInfoKHR));
create_info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
create_info.surface = demo->surface;
create_info.minImageCount = demo->swap_chain_images_len;
create_info.imageFormat = surface_format.format;
create_info.imageColorSpace = surface_format.colorSpace;
create_info.imageExtent = extent;
create_info.imageArrayLayers = 1;
create_info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
if (demo->indices.graphics != demo->indices.present) {
create_info.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
create_info.queueFamilyIndexCount = 2;
create_info.pQueueFamilyIndices = queue_family_indices;
} else {
create_info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
}
create_info.preTransform = swap_chain_support.capabilities.currentTransform;
create_info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
create_info.presentMode = present_mode;
create_info.clipped = VK_TRUE;
result = vkCreateSwapchainKHR(demo->device, &create_info, NULL,
&demo->swap_chain);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateSwapchainKHR failed: %d\n", result);
goto cleanup;
}
result = vkGetSwapchainImagesKHR(demo->device, demo->swap_chain,
&demo->swap_chain_images_len, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkGetSwapchainImagesKHR failed: %d\n", result);
goto cleanup;
}
if (demo->swap_chain_images == NULL) {
demo->swap_chain_images =
malloc(demo->swap_chain_images_len * sizeof(VkImage));
}
result = vkGetSwapchainImagesKHR(demo->device, demo->swap_chain,
&demo->swap_chain_images_len,
demo->swap_chain_images);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkGetSwapchainImagesKHR failed: %d\n", result);
return false;
}
demo->swap_chain_image_format = surface_format.format;
demo->swap_chain_image_extent = extent;
ret = true;
cleanup:
swap_chain_support_details_free(&swap_chain_support);
return ret;
}
bool create_swap_chain_image_views(struct vulkan_demo *demo) {
uint32_t i;
VkResult result;
VkImageViewCreateInfo create_info;
memset(&create_info, 0, sizeof(VkImageViewCreateInfo));
create_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
create_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
create_info.format = demo->swap_chain_image_format;
create_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
create_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
create_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
create_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
create_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
create_info.subresourceRange.baseMipLevel = 0;
create_info.subresourceRange.levelCount = 1;
create_info.subresourceRange.baseArrayLayer = 0;
create_info.subresourceRange.layerCount = 1;
if (!demo->swap_chain_image_views) {
demo->swap_chain_image_views =
malloc(demo->swap_chain_images_len * sizeof(VkImageView));
}
for (i = 0; i < demo->swap_chain_images_len; i++) {
create_info.image = demo->swap_chain_images[i];
result = vkCreateImageView(demo->device, &create_info, NULL,
&demo->swap_chain_image_views[i]);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateImageView failed: %d\n", result);
return false;
}
}
return true;
}
bool create_overlay_images(struct vulkan_demo *demo) {
uint32_t i, j;
VkResult result;
VkMemoryRequirements mem_requirements;
VkPhysicalDeviceMemoryProperties mem_properties;
int found;
VkImageCreateInfo image_info;
VkMemoryAllocateInfo alloc_info;
VkImageViewCreateInfo image_view_info;
memset(&image_info, 0, sizeof(VkImageCreateInfo));
image_info.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
image_info.imageType = VK_IMAGE_TYPE_2D;
image_info.extent.width = demo->swap_chain_image_extent.width;
image_info.extent.height = demo->swap_chain_image_extent.height;
image_info.extent.depth = 1;
image_info.mipLevels = 1;
image_info.arrayLayers = 1;
image_info.format = demo->swap_chain_image_format;
image_info.tiling = VK_IMAGE_TILING_OPTIMAL;
image_info.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
image_info.usage =
VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
image_info.samples = VK_SAMPLE_COUNT_1_BIT;
image_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
memset(&alloc_info, 0, sizeof(VkMemoryAllocateInfo));
alloc_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
memset(&image_view_info, 0, sizeof(VkImageViewCreateInfo));
image_view_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
image_view_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
image_view_info.format = demo->swap_chain_image_format;
image_view_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
image_view_info.subresourceRange.baseMipLevel = 0;
image_view_info.subresourceRange.levelCount = 1;
image_view_info.subresourceRange.baseArrayLayer = 0;
image_view_info.subresourceRange.layerCount = 1;
if (!demo->overlay_images) {
demo->overlay_images =
malloc(demo->swap_chain_images_len * sizeof(VkImage));
}
if (!demo->overlay_image_memories) {
demo->overlay_image_memories =
malloc(demo->swap_chain_images_len * sizeof(VkDeviceMemory));
}
if (!demo->overlay_image_views) {
demo->overlay_image_views =
malloc(demo->swap_chain_images_len * sizeof(VkImageView));
}
for (i = 0; i < demo->swap_chain_images_len; i++) {
result = vkCreateImage(demo->device, &image_info, NULL,
&demo->overlay_images[i]);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateImage failed for index %lu: %d\n",
(unsigned long)i, result);
return false;
}
vkGetImageMemoryRequirements(demo->device, demo->overlay_images[i],
&mem_requirements);
alloc_info.allocationSize = mem_requirements.size;
vkGetPhysicalDeviceMemoryProperties(demo->physical_device,
&mem_properties);
found = 0;
for (j = 0; j < mem_properties.memoryTypeCount; j++) {
if ((mem_requirements.memoryTypeBits & (1 << j)) &&
(mem_properties.memoryTypes[j].propertyFlags &
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) ==
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) {
found = 1;
break;
}
}
if (!found) {
fprintf(stderr,
"failed to find suitable memory type for index %lu!\n",
(unsigned long)i);
return false;
}
alloc_info.memoryTypeIndex = j;
result = vkAllocateMemory(demo->device, &alloc_info, NULL,
&demo->overlay_image_memories[i]);
if (result != VK_SUCCESS) {
fprintf(stderr,
"failed to allocate vulkan memory for index %lu: %d!\n",
(unsigned long)i, result);
return false;
}
result = vkBindImageMemory(demo->device, demo->overlay_images[i],
demo->overlay_image_memories[i], 0);
if (result != VK_SUCCESS) {
fprintf(stderr, "Couldn't bind image memory for index %lu: %d\n",
(unsigned long)i, result);
return false;
}
image_view_info.image = demo->overlay_images[i];
result = vkCreateImageView(demo->device, &image_view_info, NULL,
&demo->overlay_image_views[i]);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateImageView failed for index %lu: %d\n",
(unsigned long)i, result);
return false;
}
}
return true;
}
bool create_render_pass(struct vulkan_demo *demo) {
VkAttachmentDescription attachment;
VkAttachmentReference color_attachment_ref;
VkSubpassDescription subpass;
VkSubpassDependency dependency;
VkRenderPassCreateInfo render_pass_info;
VkResult result;
memset(&attachment, 0, sizeof(VkAttachmentDescription));
attachment.format = demo->swap_chain_image_format;
attachment.samples = VK_SAMPLE_COUNT_1_BIT;
attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
memset(&color_attachment_ref, 0, sizeof(VkAttachmentReference));
color_attachment_ref.attachment = 0;
color_attachment_ref.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
memset(&subpass, 0, sizeof(VkSubpassDescription));
subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass.colorAttachmentCount = 1;
subpass.pColorAttachments = &color_attachment_ref;
memset(&dependency, 0, sizeof(VkSubpassDependency));
dependency.srcSubpass = VK_SUBPASS_EXTERNAL;
dependency.dstSubpass = 0;
dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.srcAccessMask = 0;
dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT |
VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
memset(&render_pass_info, 0, sizeof(VkRenderPassCreateInfo));
render_pass_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
render_pass_info.attachmentCount = 1;
render_pass_info.pAttachments = &attachment;
render_pass_info.subpassCount = 1;
render_pass_info.pSubpasses = &subpass;
render_pass_info.dependencyCount = 1;
render_pass_info.pDependencies = &dependency;
result = vkCreateRenderPass(demo->device, &render_pass_info, NULL,
&demo->render_pass);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateRenderPass failed: %d\n", result);
return false;
}
return true;
}
bool create_framebuffers(struct vulkan_demo *demo) {
uint32_t i;
VkResult result;
VkFramebufferCreateInfo framebuffer_info;
if (!demo->framebuffers) {
demo->framebuffers =
malloc(demo->swap_chain_images_len * sizeof(VkFramebuffer));
}
memset(&framebuffer_info, 0, sizeof(VkFramebufferCreateInfo));
framebuffer_info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
framebuffer_info.renderPass = demo->render_pass;
framebuffer_info.attachmentCount = 1;
framebuffer_info.width = demo->swap_chain_image_extent.width;
framebuffer_info.height = demo->swap_chain_image_extent.height;
framebuffer_info.layers = 1;
for (i = 0; i < demo->swap_chain_images_len; i++) {
framebuffer_info.pAttachments = &demo->swap_chain_image_views[i];
result = vkCreateFramebuffer(demo->device, &framebuffer_info, NULL,
&demo->framebuffers[i]);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateFramebuffer failed from index %lu: %d\n",
(unsigned long)i, result);
return false;
}
}
return true;
}
bool create_descriptor_set_layout(struct vulkan_demo *demo) {
VkDescriptorSetLayoutBinding overlay_layout_binding;
VkDescriptorSetLayoutCreateInfo descriptor_set_layout_create_nfo;
VkResult result;
memset(&overlay_layout_binding, 0, sizeof(VkDescriptorSetLayoutBinding));
overlay_layout_binding.binding = 0;
overlay_layout_binding.descriptorCount = 1;
overlay_layout_binding.descriptorType =
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
overlay_layout_binding.pImmutableSamplers = NULL;
overlay_layout_binding.stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
memset(&descriptor_set_layout_create_nfo, 0,
sizeof(VkDescriptorSetLayoutCreateInfo));
descriptor_set_layout_create_nfo.sType =
VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
descriptor_set_layout_create_nfo.bindingCount = 1;
descriptor_set_layout_create_nfo.pBindings = &overlay_layout_binding;
result = vkCreateDescriptorSetLayout(demo->device,
&descriptor_set_layout_create_nfo,
NULL, &demo->descriptor_set_layout);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateDescriptorSetLayout failed: %d\n", result);
return false;
}
return true;
}
bool create_descriptor_pool(struct vulkan_demo *demo) {
VkDescriptorPoolSize pool_size;
VkDescriptorPoolCreateInfo pool_info;
VkResult result;
memset(&pool_size, 0, sizeof(VkDescriptorPoolSize));
pool_size.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
pool_size.descriptorCount = demo->swap_chain_images_len;
memset(&pool_info, 0, sizeof(VkDescriptorPoolCreateInfo));
pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
pool_info.poolSizeCount = 1;
pool_info.pPoolSizes = &pool_size;
pool_info.maxSets = demo->swap_chain_images_len;
result = vkCreateDescriptorPool(demo->device, &pool_info, NULL,
&demo->descriptor_pool);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateDescriptorPool failed: %d\n", result);
return false;
}
return true;
}
void update_descriptor_sets(struct vulkan_demo *demo) {
uint32_t i;
VkDescriptorImageInfo descriptor_image_info;
VkWriteDescriptorSet descriptor_write;
memset(&descriptor_image_info, 0, sizeof(VkDescriptorImageInfo));
descriptor_image_info.imageLayout =
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
descriptor_image_info.sampler = demo->sampler;
memset(&descriptor_write, 0, sizeof(VkWriteDescriptorSet));
descriptor_write.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
descriptor_write.dstBinding = 0;
descriptor_write.dstArrayElement = 0;
descriptor_write.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
descriptor_write.descriptorCount = 1;
descriptor_write.pImageInfo = &descriptor_image_info;
for (i = 0; i < demo->swap_chain_images_len; i++) {
descriptor_write.dstSet = demo->descriptor_sets[i];
descriptor_image_info.imageView = demo->overlay_image_views[i];
vkUpdateDescriptorSets(demo->device, 1, &descriptor_write, 0, NULL);
}
}
bool create_descriptor_sets(struct vulkan_demo *demo) {
bool ret = false;
VkDescriptorSetLayout *descriptor_set_layouts;
VkDescriptorSetAllocateInfo alloc_info;
uint32_t i;
VkResult result;
demo->descriptor_sets =
malloc(demo->swap_chain_images_len * sizeof(VkDescriptorSet));
descriptor_set_layouts =
malloc(demo->swap_chain_images_len * sizeof(VkDescriptorSetLayout));
for (i = 0; i < demo->swap_chain_images_len; i++) {
descriptor_set_layouts[i] = demo->descriptor_set_layout;
}
memset(&alloc_info, 0, sizeof(VkDescriptorSetAllocateInfo));
alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
alloc_info.descriptorPool = demo->descriptor_pool;
alloc_info.descriptorSetCount = demo->swap_chain_images_len;
alloc_info.pSetLayouts = descriptor_set_layouts;
result = vkAllocateDescriptorSets(demo->device, &alloc_info,
demo->descriptor_sets);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkAllocateDescriptorSets failed: %d\n", result);
goto cleanup;
}
update_descriptor_sets(demo);
ret = true;
cleanup:
free(descriptor_set_layouts);
return ret;
}
bool create_shader_module(VkDevice device, char *shader_buffer,
size_t shader_buffer_len,
VkShaderModule *shader_module) {
VkShaderModuleCreateInfo create_info;
VkResult result;
memset(&create_info, 0, sizeof(VkShaderModuleCreateInfo));
create_info.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
create_info.codeSize = shader_buffer_len;
create_info.pCode = (const uint32_t *)shader_buffer;
result = vkCreateShaderModule(device, &create_info, NULL, shader_module);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateShaderModule failed: %d\n", result);
return false;
}
return true;
}
bool create_graphics_pipeline(struct vulkan_demo *demo) {
bool ret = false;
char *vert_shader_code = NULL;
char *frag_shader_code = NULL;
VkShaderModule vert_shader_module = VK_NULL_HANDLE;
VkShaderModule frag_shader_module = VK_NULL_HANDLE;
FILE *fp;
size_t file_len;
VkPipelineShaderStageCreateInfo vert_shader_stage_info;
VkPipelineShaderStageCreateInfo frag_shader_stage_info;
VkPipelineShaderStageCreateInfo shader_stages[2];
VkPipelineVertexInputStateCreateInfo vertex_input_info;
VkPipelineInputAssemblyStateCreateInfo input_assembly;
VkViewport viewport;
VkRect2D scissor;
VkPipelineViewportStateCreateInfo viewport_state;
VkPipelineRasterizationStateCreateInfo rasterizer;
VkPipelineMultisampleStateCreateInfo multisampling;
VkPipelineColorBlendAttachmentState color_blend_attachment;
VkPipelineColorBlendStateCreateInfo color_blending;
VkPipelineLayoutCreateInfo pipeline_layout_info;
VkResult result;
VkGraphicsPipelineCreateInfo pipeline_info;
size_t read_result;
fp = fopen("shaders/demo.vert.spv", "r");
if (!fp) {
fprintf(stderr, "Couldn't open shaders/demo.vert.spv\n");
return false;
}
fseek(fp, 0, SEEK_END);
file_len = ftell(fp);
vert_shader_code = malloc(file_len);
fseek(fp, 0, 0);
read_result = fread(vert_shader_code, file_len, 1, fp);
fclose(fp);
if (read_result != 1) {
fprintf(stderr, "Could not read vertex shader\n");
goto cleanup;
}
if (!create_shader_module(demo->device, vert_shader_code, file_len,
&vert_shader_module)) {
goto cleanup;
}
fp = fopen("shaders/demo.frag.spv", "r");
if (!fp) {
fprintf(stderr, "Couldn't open shaders/demo.frag.spv\n");
return false;
}
fseek(fp, 0, SEEK_END);
file_len = ftell(fp);
frag_shader_code = malloc(file_len);
fseek(fp, 0, 0);
read_result = fread(frag_shader_code, file_len, 1, fp);
fclose(fp);
if (read_result != 1) {
fprintf(stderr, "Could not read fragment shader\n");
goto cleanup;
}
if (!create_shader_module(demo->device, frag_shader_code, file_len,
&frag_shader_module)) {
goto cleanup;
}
memset(&vert_shader_stage_info, 0, sizeof(VkPipelineShaderStageCreateInfo));
vert_shader_stage_info.sType =
VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
vert_shader_stage_info.stage = VK_SHADER_STAGE_VERTEX_BIT;
vert_shader_stage_info.module = vert_shader_module;
vert_shader_stage_info.pName = "main";
memset(&frag_shader_stage_info, 0, sizeof(VkPipelineShaderStageCreateInfo));
frag_shader_stage_info.sType =
VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
frag_shader_stage_info.stage = VK_SHADER_STAGE_FRAGMENT_BIT;
frag_shader_stage_info.module = frag_shader_module;
frag_shader_stage_info.pName = "main";
shader_stages[0] = vert_shader_stage_info;
shader_stages[1] = frag_shader_stage_info;
memset(&vertex_input_info, 0, sizeof(VkPipelineVertexInputStateCreateInfo));
vertex_input_info.sType =
VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
memset(&input_assembly, 0, sizeof(VkPipelineInputAssemblyStateCreateInfo));
input_assembly.sType =
VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
input_assembly.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
input_assembly.primitiveRestartEnable = VK_FALSE;
memset(&viewport, 0, sizeof(VkViewport));
viewport.x = 0.0f;
viewport.y = 0.0f;
viewport.width = (float)demo->swap_chain_image_extent.width;
viewport.height = (float)demo->swap_chain_image_extent.height;
viewport.minDepth = 0.0f;
viewport.maxDepth = 1.0f;
memset(&scissor, 0, sizeof(VkRect2D));
scissor.extent.width = demo->swap_chain_image_extent.width;
scissor.extent.height = demo->swap_chain_image_extent.height;
memset(&viewport_state, 0, sizeof(VkPipelineViewportStateCreateInfo));
viewport_state.sType =
VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
viewport_state.viewportCount = 1;
viewport_state.pViewports = &viewport;
viewport_state.scissorCount = 1;
viewport_state.pScissors = &scissor;
memset(&rasterizer, 0, sizeof(VkPipelineRasterizationStateCreateInfo));
rasterizer.sType =
VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
rasterizer.depthClampEnable = VK_FALSE;
rasterizer.rasterizerDiscardEnable = VK_FALSE;
rasterizer.polygonMode = VK_POLYGON_MODE_FILL;
rasterizer.lineWidth = 1.0f;
rasterizer.cullMode = VK_CULL_MODE_FRONT_BIT;
rasterizer.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE;
rasterizer.depthBiasEnable = VK_FALSE;
memset(&multisampling, 0, sizeof(VkPipelineMultisampleStateCreateInfo));
multisampling.sType =
VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
multisampling.sampleShadingEnable = VK_FALSE;
multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
memset(&color_blend_attachment, 0,
sizeof(VkPipelineColorBlendAttachmentState));
color_blend_attachment.colorWriteMask =
VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT |
VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
color_blend_attachment.blendEnable = VK_TRUE;
color_blend_attachment.srcColorBlendFactor = VK_BLEND_FACTOR_ONE;
color_blend_attachment.dstColorBlendFactor =
VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
color_blend_attachment.colorBlendOp = VK_BLEND_OP_ADD;
color_blend_attachment.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE;
color_blend_attachment.dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO;
color_blend_attachment.alphaBlendOp = VK_BLEND_OP_ADD;
memset(&color_blending, 0, sizeof(VkPipelineColorBlendStateCreateInfo));
color_blending.sType =
VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
color_blending.logicOpEnable = VK_FALSE;
color_blending.logicOp = VK_LOGIC_OP_COPY;
color_blending.attachmentCount = 1;
color_blending.pAttachments = &color_blend_attachment;
color_blending.blendConstants[0] = 1.0f;
color_blending.blendConstants[1] = 1.0f;
color_blending.blendConstants[2] = 1.0f;
color_blending.blendConstants[3] = 1.0f;
memset(&pipeline_layout_info, 0, sizeof(VkPipelineLayoutCreateInfo));
pipeline_layout_info.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
pipeline_layout_info.setLayoutCount = 0;
pipeline_layout_info.pushConstantRangeCount = 0;
pipeline_layout_info.setLayoutCount = 1;
pipeline_layout_info.pSetLayouts = &demo->descriptor_set_layout;
result = vkCreatePipelineLayout(demo->device, &pipeline_layout_info, NULL,
&demo->pipeline_layout);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreatePipelineLayout failed: %d\n", result);
goto cleanup;
}
memset(&pipeline_info, 0, sizeof(VkGraphicsPipelineCreateInfo));
pipeline_info.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
pipeline_info.stageCount = 2;
pipeline_info.pStages = shader_stages;
pipeline_info.pVertexInputState = &vertex_input_info;
pipeline_info.pInputAssemblyState = &input_assembly;
pipeline_info.pViewportState = &viewport_state;
pipeline_info.pRasterizationState = &rasterizer;
pipeline_info.pMultisampleState = &multisampling;
pipeline_info.pColorBlendState = &color_blending;
pipeline_info.layout = demo->pipeline_layout;
pipeline_info.renderPass = demo->render_pass;
pipeline_info.basePipelineHandle = NULL;
result = vkCreateGraphicsPipelines(demo->device, NULL, 1, &pipeline_info,
NULL, &demo->pipeline);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateGraphicsPipelines failed: %d\n", result);
goto cleanup;
}
ret = true;
cleanup:
if (frag_shader_module) {
vkDestroyShaderModule(demo->device, frag_shader_module, NULL);
}
if (frag_shader_code) {
free(frag_shader_code);
}
if (vert_shader_module) {
vkDestroyShaderModule(demo->device, vert_shader_module, NULL);
}
if (vert_shader_code) {
free(vert_shader_code);
}
return ret;
}
bool create_command_pool(struct vulkan_demo *demo) {
VkCommandPoolCreateInfo pool_info;
VkResult result;
memset(&pool_info, 0, sizeof(VkCommandPoolCreateInfo));
pool_info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
pool_info.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
pool_info.queueFamilyIndex = demo->indices.graphics;
result = vkCreateCommandPool(demo->device, &pool_info, NULL,
&demo->command_pool);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateCommandPool failed: %d\n", result);
return false;
}
return true;
}
bool create_command_buffers(struct vulkan_demo *demo) {
VkCommandBufferAllocateInfo alloc_info;
VkResult result;
demo->command_buffers =
malloc(demo->swap_chain_images_len * sizeof(VkCommandBuffer));
memset(&alloc_info, 0, sizeof(VkCommandBufferAllocateInfo));
alloc_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
alloc_info.commandPool = demo->command_pool;
alloc_info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
alloc_info.commandBufferCount = demo->swap_chain_images_len;
result = vkAllocateCommandBuffers(demo->device, &alloc_info,
demo->command_buffers);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkAllocateCommandBuffers failed: %d\n", result);
return false;
}
return true;
}
bool create_semaphores(struct vulkan_demo *demo) {
VkSemaphoreCreateInfo semaphore_info;
VkResult result;
memset(&semaphore_info, 0, sizeof(VkSemaphoreCreateInfo));
semaphore_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
result = vkCreateSemaphore(demo->device, &semaphore_info, NULL,
&demo->image_available);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateSemaphore failed: %d\n", result);
return false;
}
result = vkCreateSemaphore(demo->device, &semaphore_info, NULL,
&demo->render_finished);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateSemaphore failed: %d\n", result);
return false;
}
return true;
}
bool create_fence(struct vulkan_demo *demo) {
VkResult result;
VkFenceCreateInfo fence_create_info;
memset(&fence_create_info, 0, sizeof(VkFenceCreateInfo));
fence_create_info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
fence_create_info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
result = vkCreateFence(demo->device, &fence_create_info, NULL,
&demo->render_fence);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateFence failed: %d\n", result);
return false;
}
return true;
}
bool create_swap_chain_related_resources(struct vulkan_demo *demo) {
if (!create_swap_chain(demo)) {
return false;
}
if (!create_swap_chain_image_views(demo)) {
return false;
}
if (!create_overlay_images(demo)) {
return false;
}
if (!create_render_pass(demo)) {
return false;
}
if (!create_framebuffers(demo)) {
return false;
}
if (!create_graphics_pipeline(demo)) {
return false;
}
return true;
}
bool destroy_swap_chain_related_resources(struct vulkan_demo *demo) {
uint32_t i;
VkResult result;
result = vkQueueWaitIdle(demo->graphics_queue);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkQueueWaitIdle failed: %d\n", result);
return false;
}
for (i = 0; i < demo->swap_chain_images_len; i++) {
vkDestroyFramebuffer(demo->device, demo->framebuffers[i], NULL);
vkDestroyImageView(demo->device, demo->overlay_image_views[i], NULL);
vkDestroyImage(demo->device, demo->overlay_images[i], NULL);
vkFreeMemory(demo->device, demo->overlay_image_memories[i], NULL);
vkDestroyImageView(demo->device, demo->swap_chain_image_views[i], NULL);
}
vkDestroySwapchainKHR(demo->device, demo->swap_chain, NULL);
vkDestroyRenderPass(demo->device, demo->render_pass, NULL);
vkDestroyPipeline(demo->device, demo->pipeline, NULL);
vkDestroyPipelineLayout(demo->device, demo->pipeline_layout, NULL);
return true;
}
bool create_demo_texture(struct vulkan_demo *demo) {
VkResult result;
VkMemoryRequirements mem_requirements;
VkPhysicalDeviceMemoryProperties mem_properties;
int found;
uint32_t i;
VkImageCreateInfo image_info;
VkMemoryAllocateInfo alloc_info;
VkImageViewCreateInfo image_view_info;
VkBufferCreateInfo buffer_info;
struct {
VkDeviceMemory memory;
VkBuffer buffer;
} staging_buffer;
void *data;
VkCommandBuffer command_buffer;
VkCommandBufferBeginInfo begin_info;
VkImageMemoryBarrier image_transfer_dst_memory_barrier;
VkBufferImageCopy buffer_copy_region;
VkImageMemoryBarrier image_shader_memory_barrier;
VkFence fence;
VkFenceCreateInfo fence_create;
VkSubmitInfo submit_info;
memset(&image_info, 0, sizeof(VkImageCreateInfo));
image_info.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
image_info.imageType = VK_IMAGE_TYPE_2D;
image_info.extent.width = 2;
image_info.extent.height = 2;
image_info.extent.depth = 1;
image_info.mipLevels = 1;
image_info.arrayLayers = 1;
image_info.format = VK_FORMAT_R8_UNORM;
image_info.tiling = VK_IMAGE_TILING_LINEAR;
image_info.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
image_info.usage =
VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
image_info.samples = VK_SAMPLE_COUNT_1_BIT;
image_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
memset(&alloc_info, 0, sizeof(VkMemoryAllocateInfo));
alloc_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
memset(&image_view_info, 0, sizeof(VkImageViewCreateInfo));
image_view_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
image_view_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
image_view_info.format = VK_FORMAT_R8_UNORM;
image_view_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
image_view_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
image_view_info.subresourceRange.baseMipLevel = 0;
image_view_info.subresourceRange.levelCount = 1;
image_view_info.subresourceRange.baseArrayLayer = 0;
image_view_info.subresourceRange.layerCount = 1;
result = vkCreateImage(demo->device, &image_info, NULL,
&demo->demo_texture_image);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateImage failed: %d\n", result);
return false;
}
vkGetImageMemoryRequirements(demo->device, demo->demo_texture_image,
&mem_requirements);
alloc_info.allocationSize = mem_requirements.size;
vkGetPhysicalDeviceMemoryProperties(demo->physical_device, &mem_properties);
found = 0;
for (i = 0; i < mem_properties.memoryTypeCount; i++) {
if ((mem_requirements.memoryTypeBits & (1 << i)) &&
(mem_properties.memoryTypes[i].propertyFlags &
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) ==
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) {
found = 1;
break;
}
}
if (!found) {
fprintf(stderr, "failed to find suitable memory for demo texture!\n");
return false;
}
alloc_info.memoryTypeIndex = i;
result = vkAllocateMemory(demo->device, &alloc_info, NULL,
&demo->demo_texture_memory);
if (result != VK_SUCCESS) {
fprintf(stderr,
"failed to allocate vulkan memory for demo texture: %d!\n",
result);
return false;
}
result = vkBindImageMemory(demo->device, demo->demo_texture_image,
demo->demo_texture_memory, 0);
if (result != VK_SUCCESS) {
fprintf(stderr, "Couldn't bind image memory for demo texture: %d\n",
result);
return false;
}
image_view_info.image = demo->demo_texture_image;
result = vkCreateImageView(demo->device, &image_view_info, NULL,
&demo->demo_texture_image_view);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateImageView failed for demo texture: %d\n",
result);
return false;
}
memset(&buffer_info, 0, sizeof(VkBufferCreateInfo));
buffer_info.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
buffer_info.size = alloc_info.allocationSize;
buffer_info.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
buffer_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
result = vkCreateBuffer(demo->device, &buffer_info, NULL,
&staging_buffer.buffer);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateBuffer failed for demo texture: %d\n", result);
return false;
}
vkGetBufferMemoryRequirements(demo->device, staging_buffer.buffer,
&mem_requirements);
alloc_info.allocationSize = mem_requirements.size;
found = 0;
for (i = 0; i < mem_properties.memoryTypeCount; i++) {
if ((mem_requirements.memoryTypeBits & (1 << i)) &&
(mem_properties.memoryTypes[i].propertyFlags &
(VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
VK_MEMORY_PROPERTY_HOST_COHERENT_BIT)) ==
(VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
VK_MEMORY_PROPERTY_HOST_COHERENT_BIT)) {
found = 1;
break;
}
}
if (!found) {
fprintf(stderr, "failed to find suitable staging buffer memory for "
"demo texture!\n");
return false;
}
alloc_info.memoryTypeIndex = i;
result = vkAllocateMemory(demo->device, &alloc_info, NULL,
&staging_buffer.memory);
if (!found) {
fprintf(stderr, "vkAllocateMemory failed for demo texture: %d\n",
result);
return false;
}
result = vkBindBufferMemory(demo->device, staging_buffer.buffer,
staging_buffer.memory, 0);
if (!found) {
fprintf(stderr, "vkBindBufferMemory failed for demo texture: %d\n",
result);
return false;
}
result = vkMapMemory(demo->device, staging_buffer.memory, 0,
sizeof(uint32_t), 0, &data);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkMapMemory failed for demo texture: %d\n", result);
return false;
}
*((uint32_t *)data) = 0x00FFFF00;
vkUnmapMemory(demo->device, staging_buffer.memory);
memset(&begin_info, 0, sizeof(VkCommandBufferBeginInfo));
begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
command_buffer = demo->command_buffers[0];
result = vkBeginCommandBuffer(command_buffer, &begin_info);
memset(&image_transfer_dst_memory_barrier, 0, sizeof(VkImageMemoryBarrier));
image_transfer_dst_memory_barrier.sType =
VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
image_transfer_dst_memory_barrier.image = demo->demo_texture_image;
image_transfer_dst_memory_barrier.srcQueueFamilyIndex =
VK_QUEUE_FAMILY_IGNORED;
image_transfer_dst_memory_barrier.dstQueueFamilyIndex =
VK_QUEUE_FAMILY_IGNORED;
image_transfer_dst_memory_barrier.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
image_transfer_dst_memory_barrier.newLayout =
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
image_transfer_dst_memory_barrier.subresourceRange.aspectMask =
VK_IMAGE_ASPECT_COLOR_BIT;
image_transfer_dst_memory_barrier.subresourceRange.levelCount = 1;
image_transfer_dst_memory_barrier.subresourceRange.layerCount = 1;
image_transfer_dst_memory_barrier.dstAccessMask =
VK_ACCESS_TRANSFER_WRITE_BIT;
vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, NULL, 0, NULL, 1,
&image_transfer_dst_memory_barrier);
memset(&buffer_copy_region, 0, sizeof(VkBufferImageCopy));
buffer_copy_region.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
buffer_copy_region.imageSubresource.layerCount = 1;
buffer_copy_region.imageExtent.width = 2;
buffer_copy_region.imageExtent.height = 2;
buffer_copy_region.imageExtent.depth = 1;
vkCmdCopyBufferToImage(
command_buffer, staging_buffer.buffer, demo->demo_texture_image,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &buffer_copy_region);
memset(&image_shader_memory_barrier, 0, sizeof(VkImageMemoryBarrier));
image_shader_memory_barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
image_shader_memory_barrier.image = demo->demo_texture_image;
image_shader_memory_barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
image_shader_memory_barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
image_shader_memory_barrier.oldLayout =
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
image_shader_memory_barrier.newLayout =
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
image_shader_memory_barrier.subresourceRange.aspectMask =
VK_IMAGE_ASPECT_COLOR_BIT;
image_shader_memory_barrier.subresourceRange.levelCount = 1;
image_shader_memory_barrier.subresourceRange.layerCount = 1;
image_shader_memory_barrier.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT,
image_shader_memory_barrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, 0, 0, NULL, 0,
NULL, 1, &image_shader_memory_barrier);
result = vkEndCommandBuffer(command_buffer);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEndCommandBuffer failed for demo texture: %d\n",
result);
return false;
}
memset(&fence_create, 0, sizeof(VkFenceCreateInfo));
fence_create.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
result = vkCreateFence(demo->device, &fence_create, NULL, &fence);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkCreateFence failed for demo texture: %d\n", result);
return false;
}
memset(&submit_info, 0, sizeof(VkSubmitInfo));
submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
submit_info.commandBufferCount = 1;
submit_info.pCommandBuffers = &command_buffer;
result = vkQueueSubmit(demo->graphics_queue, 1, &submit_info, fence);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkQueueSubmit failed for demo texture: %d\n", result);
return false;
}
result = vkWaitForFences(demo->device, 1, &fence, VK_TRUE, UINT64_MAX);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkWaitForFences failed for demo texture: %d\n",
result);
return false;
}
vkDestroyBuffer(demo->device, staging_buffer.buffer, NULL);
vkFreeMemory(demo->device, staging_buffer.memory, NULL);
vkDestroyFence(demo->device, fence, NULL);
return true;
}
bool create_vulkan_demo(struct vulkan_demo *demo) {
if (!create_instance(demo)) {
return false;
}
if (!create_surface(demo)) {
return false;
}
if (!create_physical_device(demo)) {
return false;
}
if (!create_logical_device(demo)) {
return false;
}
if (!create_sampler(demo)) {
return false;
}
if (!create_descriptor_set_layout(demo)) {
return false;
}
if (!create_swap_chain_related_resources(demo)) {
return false;
}
if (!create_descriptor_pool(demo)) {
return false;
}
if (!create_descriptor_sets(demo)) {
return false;
}
if (!create_command_pool(demo)) {
return false;
}
if (!create_command_buffers(demo)) {
return false;
}
if (!create_semaphores(demo)) {
return false;
}
if (!create_fence(demo)) {
return false;
}
if (!create_demo_texture(demo)) {
return false;
}
return true;
}
bool recreate_swap_chain(struct vulkan_demo *demo) {
printf("recreating swapchain\n");
if (!destroy_swap_chain_related_resources(demo)) {
return false;
}
if (!create_swap_chain_related_resources(demo)) {
return false;
}
update_descriptor_sets(demo);
nk_sdl_resize(demo->swap_chain_image_extent.width,
demo->swap_chain_image_extent.height);
return true;
}
bool render(struct vulkan_demo *demo, struct nk_colorf *bg,
VkSemaphore wait_semaphore, uint32_t image_index) {
VkCommandBufferBeginInfo command_buffer_begin_info;
VkCommandBuffer command_buffer;
VkRenderPassBeginInfo render_pass_info;
VkSubmitInfo submit_info;
VkPipelineStageFlags wait_stage =
VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
VkResult result;
VkPresentInfoKHR present_info;
VkClearValue clear_color;
memcpy(&clear_color.color, bg, sizeof(VkClearColorValue));
memset(&command_buffer_begin_info, 0, sizeof(VkCommandBufferBeginInfo));
command_buffer_begin_info.sType =
VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
command_buffer = demo->command_buffers[image_index];
result = vkBeginCommandBuffer(command_buffer, &command_buffer_begin_info);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkBeginCommandBuffer failed: %d\n", result);
return false;
}
memset(&render_pass_info, 0, sizeof(VkRenderPassBeginInfo));
render_pass_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
render_pass_info.renderPass = demo->render_pass;
render_pass_info.framebuffer = demo->framebuffers[image_index];
render_pass_info.renderArea.offset.x = 0;
render_pass_info.renderArea.offset.y = 0;
render_pass_info.renderArea.extent = demo->swap_chain_image_extent;
render_pass_info.clearValueCount = 1;
render_pass_info.pClearValues = &clear_color;
vkCmdBeginRenderPass(command_buffer, &render_pass_info,
VK_SUBPASS_CONTENTS_INLINE);
vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
demo->pipeline);
vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
demo->pipeline_layout, 0, 1,
&demo->descriptor_sets[image_index], 0, NULL);
vkCmdDraw(command_buffer, 3, 1, 0, 0);
vkCmdEndRenderPass(command_buffer);
result = vkEndCommandBuffer(command_buffer);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkEndCommandBuffer failed: %d\n", result);
return false;
}
memset(&submit_info, 0, sizeof(VkSubmitInfo));
submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
submit_info.waitSemaphoreCount = 1;
submit_info.pWaitSemaphores = &wait_semaphore;
submit_info.pWaitDstStageMask = &wait_stage;
submit_info.commandBufferCount = 1;
submit_info.pCommandBuffers = &demo->command_buffers[image_index];
submit_info.signalSemaphoreCount = 1;
submit_info.pSignalSemaphores = &demo->render_finished;
result = vkQueueSubmit(demo->graphics_queue, 1, &submit_info,
demo->render_fence);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkQueueSubmit failed: %d\n", result);
return false;
}
memset(&present_info, 0, sizeof(VkPresentInfoKHR));
present_info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
present_info.waitSemaphoreCount = 1;
present_info.pWaitSemaphores = &demo->render_finished;
present_info.swapchainCount = 1;
present_info.pSwapchains = &demo->swap_chain;
present_info.pImageIndices = &image_index;
result = vkQueuePresentKHR(demo->present_queue, &present_info);
if (result == VK_ERROR_OUT_OF_DATE_KHR) {
if (!recreate_swap_chain(demo)) {
fprintf(stderr, "failed to recreate swap chain!\n");
}
} else if (result != VK_SUCCESS && result != VK_SUBOPTIMAL_KHR) {
fprintf(stderr, "vkQueuePresentKHR failed: %d\n", result);
return false;
}
return true;
}
VkResult
destroy_debug_utils_messenger_ext(VkInstance instance,
VkDebugUtilsMessengerEXT debugMessenger,
const VkAllocationCallbacks *pAllocator) {
PFN_vkDestroyDebugUtilsMessengerEXT func =
(PFN_vkDestroyDebugUtilsMessengerEXT)vkGetInstanceProcAddr(
instance, "vkDestroyDebugUtilsMessengerEXT");
if (func != NULL) {
func(instance, debugMessenger, pAllocator);
return VK_SUCCESS;
} else {
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
}
bool cleanup(struct vulkan_demo *demo) {
VkResult result;
printf("cleaning up\n");
result = vkDeviceWaitIdle(demo->device);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkDeviceWaitIdle failed: %d\n", result);
return false;
}
destroy_swap_chain_related_resources(demo);
vkFreeCommandBuffers(demo->device, demo->command_pool,
demo->swap_chain_images_len, demo->command_buffers);
vkDestroyCommandPool(demo->device, demo->command_pool, NULL);
vkDestroySampler(demo->device, demo->sampler, NULL);
vkDestroySemaphore(demo->device, demo->render_finished, NULL);
vkDestroySemaphore(demo->device, demo->image_available, NULL);
vkDestroyFence(demo->device, demo->render_fence, NULL);
vkDestroyImage(demo->device, demo->demo_texture_image, NULL);
vkDestroyImageView(demo->device, demo->demo_texture_image_view, NULL);
vkFreeMemory(demo->device, demo->demo_texture_memory, NULL);
vkDestroyDescriptorSetLayout(demo->device, demo->descriptor_set_layout,
NULL);
vkDestroyDescriptorPool(demo->device, demo->descriptor_pool, NULL);
vkDestroyDevice(demo->device, NULL);
vkDestroySurfaceKHR(demo->instance, demo->surface, NULL);
if (demo->debug_messenger) {
result = destroy_debug_utils_messenger_ext(demo->instance,
demo->debug_messenger, NULL);
if (result != VK_SUCCESS) {
fprintf(stderr, "Couldn't destroy debug messenger: %d\n", result);
return false;
}
}
vkDestroyInstance(demo->instance, NULL);
if (demo->swap_chain_images) {
free(demo->swap_chain_images);
}
if (demo->swap_chain_image_views) {
free(demo->swap_chain_image_views);
}
if (demo->overlay_images) {
free(demo->overlay_images);
}
if (demo->overlay_image_views) {
free(demo->overlay_image_views);
}
if (demo->overlay_image_memories) {
free(demo->overlay_image_memories);
}
if (demo->descriptor_sets) {
free(demo->descriptor_sets);
}
if (demo->framebuffers) {
free(demo->framebuffers);
}
if (demo->command_buffers) {
free(demo->command_buffers);
}
SDL_DestroyWindow(demo->win);
return true;
}
int main(void) {
struct vulkan_demo demo;
struct nk_context *ctx;
struct nk_colorf bg;
struct nk_image img;
uint32_t image_index;
VkResult result;
VkSemaphore nk_semaphore;
SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
fprintf(stderr, "[SDL] failed to init!\n");
exit(1);
}
memset(&demo, 0, sizeof(struct vulkan_demo));
demo.win = SDL_CreateWindow(
"Demo", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, WINDOW_WIDTH,
WINDOW_HEIGHT,
SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
if (!create_vulkan_demo(&demo)) {
fprintf(stderr, "failed to create vulkan demo!\n");
exit(1);
}
ctx = nk_sdl_init(demo.win, demo.device, demo.physical_device,
demo.indices.graphics, demo.overlay_image_views,
demo.swap_chain_images_len, demo.swap_chain_image_format,
0, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER);
/* Load Fonts: if none of these are loaded a default font will be used */
/* Load Cursor: if you uncomment cursor loading please hide the cursor */
{
struct nk_font_atlas *atlas;
nk_sdl_font_stash_begin(&atlas);
/*struct nk_font *droid = nk_font_atlas_add_from_file(atlas,
* "../../../extra_font/DroidSans.ttf", 14, 0);*/
/*struct nk_font *roboto = nk_font_atlas_add_from_file(atlas,
* "../../../extra_font/Roboto-Regular.ttf", 14, 0);*/
/*struct nk_font *future = nk_font_atlas_add_from_file(atlas,
* "../../../extra_font/kenvector_future_thin.ttf", 13, 0);*/
/*struct nk_font *clean = nk_font_atlas_add_from_file(atlas,
* "../../../extra_font/ProggyClean.ttf", 12, 0);*/
/*struct nk_font *tiny = nk_font_atlas_add_from_file(atlas,
* "../../../extra_font/ProggyTiny.ttf", 10, 0);*/
/*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas,
* "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/
nk_sdl_font_stash_end(demo.graphics_queue);
/*nk_style_load_all_cursors(ctx, atlas->cursors);*/
/*nk_style_set_font(ctx, &droid->handle);*/
}
img = nk_image_ptr(demo.demo_texture_image_view);
bg.r = 0.10f, bg.g = 0.18f, bg.b = 0.24f, bg.a = 1.0f;
while (true) {
SDL_Event evt;
nk_input_begin(ctx);
while (SDL_PollEvent(&evt)) {
if (evt.type == SDL_QUIT)
goto cleanup;
if (evt.type == SDL_WINDOWEVENT &&
evt.window.event == SDL_WINDOWEVENT_SIZE_CHANGED)
recreate_swap_chain(&demo);
nk_sdl_handle_event(&evt);
}
nk_sdl_handle_grab(); /* optional grabbing behavior */
nk_input_end(ctx);
/* GUI */
if (nk_begin(ctx, "Demo", nk_rect(50, 50, 230, 250),
NK_WINDOW_BORDER | NK_WINDOW_MOVABLE | NK_WINDOW_SCALABLE |
NK_WINDOW_MINIMIZABLE | NK_WINDOW_TITLE)) {
enum { EASY, HARD };
static int op = EASY;
static int property = 20;
nk_layout_row_static(ctx, 30, 80, 1);
if (nk_button_label(ctx, "button"))
fprintf(stdout, "button pressed\n");
nk_layout_row_dynamic(ctx, 30, 2);
if (nk_option_label(ctx, "easy", op == EASY))
op = EASY;
if (nk_option_label(ctx, "hard", op == HARD))
op = HARD;
nk_layout_row_dynamic(ctx, 25, 1);
nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
nk_layout_row_dynamic(ctx, 20, 1);
nk_label(ctx, "background:", NK_TEXT_LEFT);
nk_layout_row_dynamic(ctx, 25, 1);
if (nk_combo_begin_color(ctx, nk_rgb_cf(bg),
nk_vec2(nk_widget_width(ctx), 400))) {
nk_layout_row_dynamic(ctx, 120, 1);
bg = nk_color_picker(ctx, bg, NK_RGBA);
nk_layout_row_dynamic(ctx, 25, 1);
bg.r = nk_propertyf(ctx, "#R:", 0, bg.r, 1.0f, 0.01f, 0.005f);
bg.g = nk_propertyf(ctx, "#G:", 0, bg.g, 1.0f, 0.01f, 0.005f);
bg.b = nk_propertyf(ctx, "#B:", 0, bg.b, 1.0f, 0.01f, 0.005f);
bg.a = nk_propertyf(ctx, "#A:", 0, bg.a, 1.0f, 0.01f, 0.005f);
nk_combo_end(ctx);
}
}
nk_end(ctx);
/* Bindless Texture */
if (nk_begin(ctx, "Texture", nk_rect(500, 300, 200, 200),
NK_WINDOW_BORDER | NK_WINDOW_MOVABLE | NK_WINDOW_SCALABLE |
NK_WINDOW_MINIMIZABLE | NK_WINDOW_TITLE)) {
struct nk_command_buffer *canvas = nk_window_get_canvas(ctx);
struct nk_rect total_space = nk_window_get_content_region(ctx);
nk_draw_image(canvas, total_space, &img, nk_white);
}
nk_end(ctx);
/* -------------- EXAMPLES ---------------- */
#ifdef INCLUDE_CALCULATOR
calculator(ctx);
#endif
#ifdef INCLUDE_CANVAS
canvas(ctx);
#endif
#ifdef INCLUDE_OVERVIEW
overview(ctx);
#endif
#ifdef INCLUDE_NODE_EDITOR
node_editor(ctx);
#endif
/* ----------------------------------------- */
result = vkWaitForFences(demo.device, 1, &demo.render_fence, VK_TRUE,
UINT64_MAX);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkWaitForFences failed: %d\n", result);
return false;
}
result = vkResetFences(demo.device, 1, &demo.render_fence);
if (result != VK_SUCCESS) {
fprintf(stderr, "vkResetFences failed: %d\n", result);
return false;
}
result =
vkAcquireNextImageKHR(demo.device, demo.swap_chain, UINT64_MAX,
demo.image_available, NULL, &image_index);
if (result == VK_ERROR_OUT_OF_DATE_KHR) {
recreate_swap_chain(&demo);
/* If vkAcquireNextImageKHR does not successfully acquire an image,
* semaphore and fence are unaffected. */
continue;
}
if (result != VK_SUCCESS && result != VK_SUBOPTIMAL_KHR) {
fprintf(stderr, "vkAcquireNextImageKHR failed: %d\n", result);
return false;
}
/* Draw */
nk_semaphore = nk_sdl_render(demo.graphics_queue, image_index,
demo.image_available, NK_ANTI_ALIASING_ON);
if (!render(&demo, &bg, nk_semaphore, image_index)) {
fprintf(stderr, "render failed\n");
return false;
}
}
cleanup:
nk_sdl_shutdown();
cleanup(&demo);
SDL_Quit();
return 0;
}
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