feat: now setting up vulkan swapchain in RenderContext

src/render_context.c

@@ -4,22 +4,112 @@
 #include <vulkan/vulkan_core.h>
 #include "debug.h"
 #include "list.h"
+#include "mathext.h"
+
+static const List requiredVulkanExtensions = {
+    .data = (char*[]){
+        VK_KHR_SWAPCHAIN_EXTENSION_NAME
+    },
+    .cap = 1,
+    .len = 1,
+    .element_size = sizeof(char*)
+};
 
 // get the list of supported vulkan protocol extensions
 static List RenderContextGetExtensions(const RenderContext *self) {
     // get the number of available extensions
-    unsigned extCount = 0;
+    uint32_t count = 0;
-    SDL_Vulkan_GetInstanceExtensions(self->window, &extCount, 0);
+    SDL_Vulkan_GetInstanceExtensions(self->window, &count, 0);
-    List extensions = list_from_type_with_len(char*, extCount);
+    List extensions = list_from_type_with_len(char*, count);
-    if(!SDL_Vulkan_GetInstanceExtensions(self->window, &extCount, extensions.data)) {
+    if(!SDL_Vulkan_GetInstanceExtensions(self->window, &count, extensions.data)) {
         LOG_WARNING("Failed to fetch vulkan instance extensions '%s'", SDL_GetError());
     }
     return extensions;
 }
 
+static List GetDeviceExtensions(VkPhysicalDevice device) {
+    uint32_t count = 0;
+    vkEnumerateDeviceExtensionProperties(device, NULL, &count, NULL);
+    List extensions = list_with_len(sizeof(VkExtensionProperties), count);
+    if(extensions.len > 0)
+        vkEnumerateDeviceExtensionProperties(device, NULL, &count, extensions.data);
+    return extensions;
+}
+
+static VkSurfaceFormatKHR SelectSurfaceFormat(List availableFormats) {
+    list_foreach(VkSurfaceFormatKHR*, format, &availableFormats) {
+        if(format->colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR
+            && format->format == VK_FORMAT_B8G8R8A8_SRGB)
+            return *format;
+    }
+    return *list_at_as(VkSurfaceFormatKHR, &availableFormats, 0);
+}
+
+static VkPresentModeKHR SelectPresentMode(List availableModes) {
+    list_foreach(VkPresentModeKHR*, mode, &availableModes) {
+        if(*mode == VK_PRESENT_MODE_MAILBOX_KHR)
+            return *mode;
+    }
+    return VK_PRESENT_MODE_FIFO_KHR;
+}
+
+static VkExtent2D SelectSwapExtent(RenderContext *self, const VkSurfaceCapabilitiesKHR *capabilities) {
+    if(capabilities->currentExtent.width != UINT32_MAX) {
+        return capabilities->currentExtent;
+    }
+    int width, height;
+    SDL_Vulkan_GetDrawableSize(self->window, &width, &height);
+    return (VkExtent2D) {
+        .width = CLAMP((uint32_t)width, capabilities->minImageExtent.width, capabilities->maxImageExtent.width),
+        .height = CLAMP((uint32_t)height, capabilities->minImageExtent.height, capabilities->maxImageExtent.height)
+    };;
+}
+
+static int CheckExtensionSupport(VkPhysicalDevice device) {
+    List supported = GetDeviceExtensions(device);
+    int isValid = 1;
+    for(size_t i = 0; isValid && i < requiredVulkanExtensions.len; ++i) {
+        if(list_contains(&supported, ((VkExtensionProperties*)requiredVulkanExtensions.data) + i) == 0)
+            isValid = 0;
+    }
+    list_empty(&supported);
+    ASSERT_RETURN(isValid, 0, "Not all required vulkan extensions are supported");
+    return isValid;
+}
+
+static SwapChainSupportInfo RenderContextGetSwapChainSupport(RenderContext *self, VkPhysicalDevice device) {
+    SwapChainSupportInfo support = {0};
+    vkGetPhysicalDeviceSurfaceCapabilitiesKHR(device, self->windowSurface, &support.capabilities);
+    uint32_t count = 0;
+    vkGetPhysicalDeviceSurfaceFormatsKHR(device, self->windowSurface, &count, NULL);
+    if(count > 0) {
+        support.formats = list_with_len(sizeof(VkSurfaceFormatKHR), count);
+        vkGetPhysicalDeviceSurfaceFormatsKHR(device, self->windowSurface, &count, support.formats.data);
+    }
+    vkGetPhysicalDeviceSurfacePresentModesKHR(device, self->windowSurface, &count, NULL);
+    if(count > 0) {
+        support.presentModes = list_with_len(sizeof(VkPresentModeKHR), count);
+        vkGetPhysicalDeviceSurfaceFormatsKHR(device, self->windowSurface, &count, support.presentModes.data);
+    }
+    return support;
+}
+
+static void SwapChainSupportInfoClean(SwapChainSupportInfo *self) {
+    list_empty(&self->formats);
+    list_empty(&self->presentModes);
+}
+
+static int CheckSupportedSwapChain(RenderContext *self, VkPhysicalDevice device) {
+    SwapChainSupportInfo swapchain = RenderContextGetSwapChainSupport(self, device);
+    int validSwapChain = swapchain.formats.len > 0
+        && swapchain.presentModes.len > 0;
+    SwapChainSupportInfoClean(&swapchain);
+    return validSwapChain;
+}
+
 // returns 1 if the GPU reference by device is usable for this application
 // 0 otherwise
-static int GpuIsUsable(VkPhysicalDevice device) {
+static int GpuIsUsable(RenderContext* self, VkPhysicalDevice device) {
     // get properties and features
     VkPhysicalDeviceProperties properties;
     VkPhysicalDeviceFeatures features;
@@ -28,7 +118,9 @@ static int GpuIsUsable(VkPhysicalDevice device) {
     // integrated or discrete works
     return (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU || properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU)
         // needs geometry shader support
-        && (features.geometryShader);
+        && (features.geometryShader)
+        && CheckExtensionSupport(device)
+        && CheckSupportedSwapChain(self, device);
 }
 
 // initialize the SDL window for this application
@@ -70,7 +162,7 @@ static void RenderContextSelectPhysicalDevice(RenderContext *self) {
     vkEnumeratePhysicalDevices(self->vulkanInstance, &deviceCount, devices.data);
     // search through the available devices for one suitable to our usecase
     list_foreach(VkPhysicalDevice*, device, &devices) {
-        if(GpuIsUsable(*device)) {
+        if(GpuIsUsable(self, *device)) {
             self->physicalDevice = *device;
             break;
         }
@@ -148,15 +240,20 @@ static void RenderContextCreateLogicalDevice(RenderContext *self) {
     const float priorities = 1.f;
     list_foreach(VkDeviceQueueCreateInfo*, info, &queueCreateInfo)
         info->pQueuePriorities = &priorities;
+
+    List extensions = list_copy(&requiredVulkanExtensions);
     VkDeviceCreateInfo createInfo = {
         .sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
         .pQueueCreateInfos = queueCreateInfo.data,
         .queueCreateInfoCount = queueCreateInfo.len,
+        .enabledExtensionCount = (uint32_t)extensions.len,
+        .ppEnabledExtensionNames = extensions.data
     };
     VkPhysicalDeviceFeatures features = {0};
     if(vkCreateDevice(self->physicalDevice, &createInfo, NULL, &self->device) != VK_SUCCESS) {
         LOG_ERROR("Failed to create vulkan logical device");
     }
+    list_empty(&extensions);
     list_empty(&queueCreateInfo);
     vkGetDeviceQueue(self->device, queueFamilies.graphicsQueue, 0, &self->graphicsQueue);
     vkGetDeviceQueue(self->device, queueFamilies.presentQueue, 0, &self->presentQueue);
@@ -168,17 +265,71 @@ static void RenderContextCreateSurface(RenderContext *self) {
     }
 }
 
+static void RenderContextCreateSwapchain(RenderContext *self) {
+    // convert supported capabilities to prefered settings
+    SwapChainSupportInfo support = RenderContextGetSwapChainSupport(self, self->physicalDevice);
+    self->swapchainExtent = SelectSwapExtent(self, &support.capabilities);
+    VkSurfaceFormatKHR surfaceFormat = SelectSurfaceFormat(support.formats);
+    self->swapchainFormat = surfaceFormat.format;
+    VkPresentModeKHR presentMode = SelectPresentMode(support.presentModes);
+    uint32_t chainLength = support.capabilities.minImageCount;
+    if(support.capabilities.maxImageCount > 0)
+        chainLength = MAX(chainLength, support.capabilities.maxImageCount);
+    VkSwapchainCreateInfoKHR createInfo = {
+        .sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR,
+        .surface = self->windowSurface,
+        .minImageCount = chainLength,
+        .imageFormat = surfaceFormat.format,
+        .imageColorSpace = surfaceFormat.colorSpace,
+        .imageExtent = self->swapchainExtent,
+        .imageArrayLayers = 1,
+        .imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+        .imageSharingMode = VK_SHARING_MODE_EXCLUSIVE,
+        .preTransform = support.capabilities.currentTransform,
+        .compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR,
+        .presentMode = presentMode,
+        .clipped = VK_TRUE,
+        .oldSwapchain = VK_NULL_HANDLE,
+    };
+    // if the present and graphics queue are not the same, they need to work together
+    // allow this swapchain to be accessed by both
+    QueueFamilyIndexes families = RenderContextFindQueueFamilies(self);
+    if(families.graphicsQueue != families.presentQueue) {
+        createInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
+        createInfo.queueFamilyIndexCount = 2;
+        createInfo.pQueueFamilyIndices = families.as_array;
+    }
+    SwapChainSupportInfoClean(&support);
+    if(vkCreateSwapchainKHR(self->device, &createInfo, NULL, &self->swapchain) != VK_SUCCESS) {
+       LOG_ERROR("Failed to create vulkan swapchain"); 
+    }
+    vkGetSwapchainImagesKHR(self->device, self->swapchain, &chainLength, NULL);
+    self->swapchainImages = list_with_len(sizeof(VkImage), chainLength);
+    vkGetSwapchainImagesKHR(self->device, self->swapchain, &chainLength, self->swapchainImages.data);
+}
+
 RenderContext *RenderContextCreate(const VkApplicationInfo *appinfo) {
+    LOG_INFO("Creating render context");
     RenderContext* self = malloc(sizeof(RenderContext));
     memset(self, 0x0, sizeof(RenderContext));
+    LOG_INFO("Initializing SDL window");
     RenderContextInitSdlWindow(self, appinfo);
+    LOG_INFO("Initializing vulkan instance");
     RenderContextInitVulkanInstance(self, appinfo);
-    RenderContextSelectPhysicalDevice(self);
+    LOG_INFO("Creating window render surface");
     RenderContextCreateSurface(self);
+    LOG_INFO("Selecting physical device");
+    RenderContextSelectPhysicalDevice(self);
+    LOG_INFO("Creating logical device");
+    RenderContextCreateLogicalDevice(self);
+    LOG_INFO("Set up swapchain");
+    RenderContextCreateSwapchain(self);
+    LOG_INFO("Finished setting up vulkan render context");
     return self;
 }
 
 void RenderContextDestroy(RenderContext *self) {
+    vkDestroySwapchainKHR(self->device, self->swapchain, NULL);
     vkDestroySurfaceKHR(self->vulkanInstance, self->windowSurface, NULL);
     vkDestroyDevice(self->device, NULL);
     vkDestroyInstance(self->vulkanInstance, NULL);

src/render_context.h

@@ -7,12 +7,18 @@
 #include <vulkan/vulkan.h>
 #include <vulkan/vulkan_core.h>
 
+#include "list.h"
+
 typedef struct RenderContext {
     SDL_Window *window;
     VkInstance vulkanInstance;
     VkPhysicalDevice physicalDevice;
     VkDevice device;
     VkSurfaceKHR windowSurface;
+    VkSwapchainKHR swapchain;
+    List swapchainImages; // <VkImage>
+    VkFormat swapchainFormat;
+    VkExtent2D swapchainExtent;
 
     VkQueue graphicsQueue;
     VkQueue presentQueue;
@@ -32,6 +38,12 @@ typedef struct QueueFamilyIndexes {
     };
 } QueueFamilyIndexes;
 
+typedef struct SwapChainSupportInfo {
+    VkSurfaceCapabilitiesKHR capabilities;
+    List formats;      // <VkSurfaceFormatKHR>
+    List presentModes; // <VkPresentModeKHR>
+} SwapChainSupportInfo;
+
 RenderContext *RenderContextCreate(const VkApplicationInfo *appinfo);
 void RenderContextDestroy(RenderContext *self);