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IntroductionToVulkan/Project/Common/VulkanCommon.cpp

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// Copyright 2016 Intel Corporation All Rights Reserved
//
// Intel makes no representations about the suitability of this software for any purpose.
// THIS SOFTWARE IS PROVIDED ""AS IS."" INTEL SPECIFICALLY DISCLAIMS ALL WARRANTIES,
// EXPRESS OR IMPLIED, AND ALL LIABILITY, INCLUDING CONSEQUENTIAL AND OTHER INDIRECT DAMAGES,
// FOR THE USE OF THIS SOFTWARE, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY
// RIGHTS, AND INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
// Intel does not assume any responsibility for any errors which may appear in this software
// nor any responsibility to update it.
#include <cstring>
#include "VulkanCommon.h"
#include "VulkanFunctions.h"
namespace Tutorial {
VulkanCommon::VulkanCommon() :
VulkanLibrary(),
Window(),
Vulkan() {
}
bool VulkanCommon::PrepareVulkan( OS::WindowParameters parameters ) {
Window = parameters;
if( !LoadVulkanLibrary() ) {
return false;
}
if( !LoadExportedEntryPoints() ) {
return false;
}
if( !LoadGlobalLevelEntryPoints() ) {
return false;
}
if( !CreateInstance() ) {
return false;
}
if( !LoadInstanceLevelEntryPoints() ) {
return false;
}
if( !CreatePresentationSurface() ) {
return false;
}
if( !CreateDevice() ) {
return false;
}
if( !LoadDeviceLevelEntryPoints() ) {
return false;
}
if( !GetDeviceQueue() ) {
return false;
}
if( !CreateSwapChain() ) {
return false;
}
if( !CreateSemaphores() ) {
return false;
}
return true;
}
bool VulkanCommon::OnWindowSizeChanged() {
ChildClear();
if( !CreateSwapChain() ) {
return false;
}
return ChildOnWindowSizeChanged();
}
VkPhysicalDevice VulkanCommon::GetPhysicalDevice() const {
return Vulkan.PhysicalDevice;
}
VkDevice VulkanCommon::GetDevice() const {
return Vulkan.Device;
}
const QueueParameters VulkanCommon::GetGraphicsQueue() const {
return Vulkan.GraphicsQueue;
}
const QueueParameters VulkanCommon::GetPresentQueue() const {
return Vulkan.PresentQueue;
}
const SwapChainParameters VulkanCommon::GetSwapChain() const {
return Vulkan.SwapChain;
}
const VkSemaphore VulkanCommon::GetImageAvailableSemaphore() const {
return Vulkan.ImageAvailableSemaphore;
}
const VkSemaphore VulkanCommon::GetRenderingFinishedSemaphore() const {
return Vulkan.RenderingFinishedSemaphore;
}
bool VulkanCommon::LoadVulkanLibrary() {
#if defined(VK_USE_PLATFORM_WIN32_KHR)
VulkanLibrary = LoadLibrary( "vulkan-1.dll" );
#elif defined(VK_USE_PLATFORM_XCB_KHR) || defined(VK_USE_PLATFORM_XLIB_KHR)
VulkanLibrary = dlopen( "libvulkan.so", RTLD_NOW );
#endif
if( VulkanLibrary == nullptr ) {
printf( "Could not load Vulkan library!\n" );
return false;
}
return true;
}
bool VulkanCommon::LoadExportedEntryPoints() {
#if defined(VK_USE_PLATFORM_WIN32_KHR)
#define LoadProcAddress GetProcAddress
#elif defined(VK_USE_PLATFORM_XCB_KHR) || defined(VK_USE_PLATFORM_XLIB_KHR)
#define LoadProcAddress dlsym
#endif
#define VK_EXPORTED_FUNCTION( fun ) \
if( !(fun = (PFN_##fun)LoadProcAddress( VulkanLibrary, #fun )) ) { \
printf( "Could not load exported function: " #fun "!\n" ); \
return false; \
}
#include "ListOfFunctions.inl"
return true;
}
bool VulkanCommon::LoadGlobalLevelEntryPoints() {
#define VK_GLOBAL_LEVEL_FUNCTION( fun ) \
if( !(fun = (PFN_##fun)vkGetInstanceProcAddr( nullptr, #fun )) ) { \
printf( "Could not load global level function: " #fun "!\n" ); \
return false; \
}
#include "ListOfFunctions.inl"
return true;
}
bool VulkanCommon::CreateInstance() {
uint32_t extensions_count = 0;
if( (vkEnumerateInstanceExtensionProperties( nullptr, &extensions_count, nullptr ) != VK_SUCCESS) ||
(extensions_count == 0) ) {
printf( "Error occurred during instance extensions enumeration!\n" );
return false;
}
std::vector<VkExtensionProperties> available_extensions( extensions_count );
if( vkEnumerateInstanceExtensionProperties( nullptr, &extensions_count, &available_extensions[0] ) != VK_SUCCESS ) {
printf( "Error occurred during instance extensions enumeration!\n" );
return false;
}
std::vector<const char*> extensions = {
VK_KHR_SURFACE_EXTENSION_NAME,
#if defined(VK_USE_PLATFORM_WIN32_KHR)
VK_KHR_WIN32_SURFACE_EXTENSION_NAME
#elif defined(VK_USE_PLATFORM_XCB_KHR)
VK_KHR_XCB_SURFACE_EXTENSION_NAME
#elif defined(VK_USE_PLATFORM_XLIB_KHR)
VK_KHR_XLIB_SURFACE_EXTENSION_NAME
#endif
};
for( size_t i = 0; i < extensions.size(); ++i ) {
if( !CheckExtensionAvailability( extensions[i], available_extensions ) ) {
printf( "Could not find instance extension named \"%s\"!\n", extensions[i] );
return false;
}
}
VkApplicationInfo application_info = {
VK_STRUCTURE_TYPE_APPLICATION_INFO, // VkStructureType sType
nullptr, // const void *pNext
"API without Secrets: Introduction to Vulkan", // const char *pApplicationName
VK_MAKE_VERSION( 1, 0, 0 ), // uint32_t applicationVersion
"Vulkan Tutorial by Intel", // const char *pEngineName
VK_MAKE_VERSION( 1, 0, 0 ), // uint32_t engineVersion
VK_API_VERSION // uint32_t apiVersion
};
VkInstanceCreateInfo instance_create_info = {
VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO, // VkStructureType sType
nullptr, // const void *pNext
0, // VkInstanceCreateFlags flags
&application_info, // const VkApplicationInfo *pApplicationInfo
0, // uint32_t enabledLayerCount
nullptr, // const char * const *ppEnabledLayerNames
static_cast<uint32_t>(extensions.size()), // uint32_t enabledExtensionCount
&extensions[0] // const char * const *ppEnabledExtensionNames
};
if( vkCreateInstance( &instance_create_info, nullptr, &Vulkan.Instance ) != VK_SUCCESS ) {
printf( "Could not create Vulkan instance!\n" );
return false;
}
return true;
}
bool VulkanCommon::LoadInstanceLevelEntryPoints() {
#define VK_INSTANCE_LEVEL_FUNCTION( fun ) \
if( !(fun = (PFN_##fun)vkGetInstanceProcAddr( Vulkan.Instance, #fun )) ) { \
printf( "Could not load instance level function: " #fun "\n" ); \
return false; \
}
#include "ListOfFunctions.inl"
return true;
}
bool VulkanCommon::CreatePresentationSurface() {
#if defined(VK_USE_PLATFORM_WIN32_KHR)
VkWin32SurfaceCreateInfoKHR surface_create_info = {
VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR, // VkStructureType sType
nullptr, // const void *pNext
0, // VkWin32SurfaceCreateFlagsKHR flags
Window.Instance, // HINSTANCE hinstance
Window.Handle // HWND hwnd
};
if( vkCreateWin32SurfaceKHR( Vulkan.Instance, &surface_create_info, nullptr, &Vulkan.PresentationSurface ) == VK_SUCCESS ) {
return true;
}
#elif defined(VK_USE_PLATFORM_XCB_KHR)
VkXcbSurfaceCreateInfoKHR surface_create_info = {
VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR, // VkStructureType sType
nullptr, // const void *pNext
0, // VkXcbSurfaceCreateFlagsKHR flags
Window.Connection, // xcb_connection_t* connection
Window.Handle // xcb_window_t window
};
if( vkCreateXcbSurfaceKHR( Vulkan.Instance, &surface_create_info, nullptr, &Vulkan.PresentationSurface ) == VK_SUCCESS ) {
return true;
}
#elif defined(VK_USE_PLATFORM_XLIB_KHR)
VkXlibSurfaceCreateInfoKHR surface_create_info = {
VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR, // VkStructureType sType
nullptr, // const void *pNext
0, // VkXlibSurfaceCreateFlagsKHR flags
Window.DisplayPtr, // Display *dpy
Window.Handle // Window window
};
if( vkCreateXlibSurfaceKHR( Vulkan.Instance, &surface_create_info, nullptr, &Vulkan.PresentationSurface ) == VK_SUCCESS ) {
return true;
}
#endif
printf( "Could not create presentation surface!\n" );
return false;
}
bool VulkanCommon::CreateDevice() {
uint32_t num_devices = 0;
if( (vkEnumeratePhysicalDevices( Vulkan.Instance, &num_devices, nullptr ) != VK_SUCCESS) ||
(num_devices == 0) ) {
printf( "Error occurred during physical devices enumeration!\n" );
return false;
}
std::vector<VkPhysicalDevice> physical_devices( num_devices );
if( vkEnumeratePhysicalDevices( Vulkan.Instance, &num_devices, &physical_devices[0] ) != VK_SUCCESS ) {
printf( "Error occurred during physical devices enumeration!\n" );
return false;
}
uint32_t selected_graphics_queue_family_index = UINT32_MAX;
uint32_t selected_present_queue_family_index = UINT32_MAX;
for( uint32_t i = 0; i < num_devices; ++i ) {
if( CheckPhysicalDeviceProperties( physical_devices[i], selected_graphics_queue_family_index, selected_present_queue_family_index ) ) {
Vulkan.PhysicalDevice = physical_devices[i];
}
}
if( Vulkan.PhysicalDevice == VK_NULL_HANDLE ) {
printf( "Could not select physical device based on the chosen properties!\n" );
return false;
}
std::vector<VkDeviceQueueCreateInfo> queue_create_infos;
std::vector<float> queue_priorities = { 1.0f };
queue_create_infos.push_back( {
VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, // VkStructureType sType
nullptr, // const void *pNext
0, // VkDeviceQueueCreateFlags flags
selected_graphics_queue_family_index, // uint32_t queueFamilyIndex
static_cast<uint32_t>(queue_priorities.size()), // uint32_t queueCount
&queue_priorities[0] // const float *pQueuePriorities
} );
if( selected_graphics_queue_family_index != selected_present_queue_family_index ) {
queue_create_infos.push_back( {
VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, // VkStructureType sType
nullptr, // const void *pNext
0, // VkDeviceQueueCreateFlags flags
selected_present_queue_family_index, // uint32_t queueFamilyIndex
static_cast<uint32_t>(queue_priorities.size()), // uint32_t queueCount
&queue_priorities[0] // const float *pQueuePriorities
} );
}
std::vector<const char*> extensions = {
VK_KHR_SWAPCHAIN_EXTENSION_NAME
};
VkDeviceCreateInfo device_create_info = {
VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO, // VkStructureType sType
nullptr, // const void *pNext
0, // VkDeviceCreateFlags flags
static_cast<uint32_t>(queue_create_infos.size()), // uint32_t queueCreateInfoCount
&queue_create_infos[0], // const VkDeviceQueueCreateInfo *pQueueCreateInfos
0, // uint32_t enabledLayerCount
nullptr, // const char * const *ppEnabledLayerNames
static_cast<uint32_t>(extensions.size()), // uint32_t enabledExtensionCount
&extensions[0], // const char * const *ppEnabledExtensionNames
nullptr // const VkPhysicalDeviceFeatures *pEnabledFeatures
};
if( vkCreateDevice( Vulkan.PhysicalDevice, &device_create_info, nullptr, &Vulkan.Device ) != VK_SUCCESS ) {
printf( "Could not create Vulkan device!\n" );
return false;
}
Vulkan.GraphicsQueue.FamilyIndex = selected_graphics_queue_family_index;
Vulkan.PresentQueue.FamilyIndex = selected_present_queue_family_index;
return true;
}
bool VulkanCommon::CheckPhysicalDeviceProperties( VkPhysicalDevice physical_device, uint32_t &selected_graphics_queue_family_index, uint32_t &selected_present_queue_family_index ) {
uint32_t extensions_count = 0;
if( (vkEnumerateDeviceExtensionProperties( physical_device, nullptr, &extensions_count, nullptr ) != VK_SUCCESS) ||
(extensions_count == 0) ) {
printf( "Error occurred during physical device %p extensions enumeration!\n", physical_device );
return false;
}
std::vector<VkExtensionProperties> available_extensions( extensions_count );
if( vkEnumerateDeviceExtensionProperties( physical_device, nullptr, &extensions_count, &available_extensions[0] ) != VK_SUCCESS ) {
printf( "Error occurred during physical device %p extensions enumeration!\n", physical_device );
return false;
}
std::vector<const char*> device_extensions = {
VK_KHR_SWAPCHAIN_EXTENSION_NAME
};
for( size_t i = 0; i < device_extensions.size(); ++i ) {
if( !CheckExtensionAvailability( device_extensions[i], available_extensions ) ) {
printf( "Physical device %p doesn't support extension named \"%s\"!\n", physical_device, device_extensions[i] );
return false;
}
}
VkPhysicalDeviceProperties device_properties;
VkPhysicalDeviceFeatures device_features;
vkGetPhysicalDeviceProperties( physical_device, &device_properties );
vkGetPhysicalDeviceFeatures( physical_device, &device_features );
uint32_t major_version = VK_VERSION_MAJOR( device_properties.apiVersion );
if( (major_version < 1) &&
(device_properties.limits.maxImageDimension2D < 4096) ) {
printf( "Physical device %p doesn't support required parameters!\n", physical_device );
return false;
}
uint32_t queue_families_count = 0;
vkGetPhysicalDeviceQueueFamilyProperties( physical_device, &queue_families_count, nullptr );
if( queue_families_count == 0 ) {
printf( "Physical device %p doesn't have any queue families!\n", physical_device );
return false;
}
std::vector<VkQueueFamilyProperties> queue_family_properties( queue_families_count );
std::vector<VkBool32> queue_present_support( queue_families_count );
vkGetPhysicalDeviceQueueFamilyProperties( physical_device, &queue_families_count, &queue_family_properties[0] );
uint32_t graphics_queue_family_index = UINT32_MAX;
uint32_t present_queue_family_index = UINT32_MAX;
for( uint32_t i = 0; i < queue_families_count; ++i ) {
vkGetPhysicalDeviceSurfaceSupportKHR( physical_device, i, Vulkan.PresentationSurface, &queue_present_support[i] );
if( (queue_family_properties[i].queueCount > 0) &&
(queue_family_properties[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) ) {
// Select first queue that supports graphics
if( graphics_queue_family_index == UINT32_MAX ) {
graphics_queue_family_index = i;
}
// If there is queue that supports both graphics and present - prefer it
if( queue_present_support[i] ) {
selected_graphics_queue_family_index = i;
selected_present_queue_family_index = i;
return true;
}
}
}
// We don't have queue that supports both graphics and present so we have to use separate queues
for( uint32_t i = 0; i < queue_families_count; ++i ) {
if( queue_present_support[i] ) {
present_queue_family_index = i;
break;
}
}
// If this device doesn't support queues with graphics and present capabilities don't use it
if( (graphics_queue_family_index == UINT32_MAX) ||
(present_queue_family_index == UINT32_MAX) ) {
printf( "Could not find queue families with required properties on physical device %p!\n", physical_device );
return false;
}
selected_graphics_queue_family_index = graphics_queue_family_index;
selected_present_queue_family_index = present_queue_family_index;
return true;
}
bool VulkanCommon::LoadDeviceLevelEntryPoints() {
#define VK_DEVICE_LEVEL_FUNCTION( fun ) \
if( !(fun = (PFN_##fun)vkGetDeviceProcAddr( Vulkan.Device, #fun )) ) { \
printf( "Could not load device level function: " #fun "!\n" ); \
return false; \
}
#include "ListOfFunctions.inl"
return true;
}
bool VulkanCommon::GetDeviceQueue() {
vkGetDeviceQueue( Vulkan.Device, Vulkan.GraphicsQueue.FamilyIndex, 0, &Vulkan.GraphicsQueue.Handle );
vkGetDeviceQueue( Vulkan.Device, Vulkan.PresentQueue.FamilyIndex, 0, &Vulkan.PresentQueue.Handle );
return true;
}
bool VulkanCommon::CreateSwapChain() {
if( Vulkan.Device != VK_NULL_HANDLE ) {
vkDeviceWaitIdle( Vulkan.Device );
}
VkSurfaceCapabilitiesKHR surface_capabilities;
if( vkGetPhysicalDeviceSurfaceCapabilitiesKHR( Vulkan.PhysicalDevice, Vulkan.PresentationSurface, &surface_capabilities ) != VK_SUCCESS ) {
printf( "Could not check presentation surface capabilities!\n" );
return false;
}
uint32_t formats_count;
if( (vkGetPhysicalDeviceSurfaceFormatsKHR( Vulkan.PhysicalDevice, Vulkan.PresentationSurface, &formats_count, nullptr ) != VK_SUCCESS) ||
(formats_count == 0) ) {
printf( "Error occurred during presentation surface formats enumeration!\n" );
return false;
}
std::vector<VkSurfaceFormatKHR> surface_formats( formats_count );
if( vkGetPhysicalDeviceSurfaceFormatsKHR( Vulkan.PhysicalDevice, Vulkan.PresentationSurface, &formats_count, &surface_formats[0] ) != VK_SUCCESS ) {
printf( "Error occurred during presentation surface formats enumeration!\n" );
return false;
}
uint32_t present_modes_count;
if( (vkGetPhysicalDeviceSurfacePresentModesKHR( Vulkan.PhysicalDevice, Vulkan.PresentationSurface, &present_modes_count, nullptr ) != VK_SUCCESS) ||
(present_modes_count == 0) ) {
printf( "Error occurred during presentation surface present modes enumeration!\n" );
return false;
}
std::vector<VkPresentModeKHR> present_modes( present_modes_count );
if( vkGetPhysicalDeviceSurfacePresentModesKHR( Vulkan.PhysicalDevice, Vulkan.PresentationSurface, &present_modes_count, &present_modes[0] ) != VK_SUCCESS ) {
printf( "Error occurred during presentation surface present modes enumeration!\n" );
return false;
}
uint32_t desired_number_of_images = GetSwapChainNumImages( surface_capabilities );
VkSurfaceFormatKHR desired_format = GetSwapChainFormat( surface_formats );
VkExtent2D desired_extent = GetSwapChainExtent( surface_capabilities );
VkImageUsageFlags desired_usage = GetSwapChainUsageFlags( surface_capabilities );
VkSurfaceTransformFlagBitsKHR desired_transform = GetSwapChainTransform( surface_capabilities );
VkPresentModeKHR desired_present_mode = GetSwapChainPresentMode( present_modes );
VkSwapchainKHR old_swap_chain = Vulkan.SwapChain.Handle;
if( static_cast<int>(desired_usage) == 0 ) {
printf( "TRANSFER_DST image usage is not supported by the swap chain!" );
return false;
}
VkSwapchainCreateInfoKHR swap_chain_create_info = {
VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR, // VkStructureType sType
nullptr, // const void *pNext
0, // VkSwapchainCreateFlagsKHR flags
Vulkan.PresentationSurface, // VkSurfaceKHR surface
desired_number_of_images, // uint32_t minImageCount
desired_format.format, // VkFormat imageFormat
desired_format.colorSpace, // VkColorSpaceKHR imageColorSpace
desired_extent, // VkExtent2D imageExtent
1, // uint32_t imageArrayLayers
desired_usage, // VkImageUsageFlags imageUsage
VK_SHARING_MODE_EXCLUSIVE, // VkSharingMode imageSharingMode
0, // uint32_t queueFamilyIndexCount
nullptr, // const uint32_t *pQueueFamilyIndices
desired_transform, // VkSurfaceTransformFlagBitsKHR preTransform
VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR, // VkCompositeAlphaFlagBitsKHR compositeAlpha
desired_present_mode, // VkPresentModeKHR presentMode
VK_TRUE, // VkBool32 clipped
old_swap_chain // VkSwapchainKHR oldSwapchain
};
if( vkCreateSwapchainKHR( Vulkan.Device, &swap_chain_create_info, nullptr, &Vulkan.SwapChain.Handle ) != VK_SUCCESS ) {
printf( "Could not create swap chain!\n" );
return false;
}
if( old_swap_chain != VK_NULL_HANDLE ) {
vkDestroySwapchainKHR( Vulkan.Device, old_swap_chain, nullptr );
}
Vulkan.SwapChain.Format = desired_format.format;
uint32_t image_count = 0;
if( (vkGetSwapchainImagesKHR( Vulkan.Device, Vulkan.SwapChain.Handle, &image_count, nullptr ) != VK_SUCCESS) ||
(image_count == 0) ) {
printf( "Could not get swap chain images!\n" );
return false;
}
Vulkan.SwapChain.Images.resize( image_count );
if( vkGetSwapchainImagesKHR( Vulkan.Device, Vulkan.SwapChain.Handle, &image_count, &Vulkan.SwapChain.Images[0] ) != VK_SUCCESS ) {
printf( "Could not get swap chain images!\n" );
return false;
}
return true;
}
bool VulkanCommon::CreateSemaphores( ) {
VkSemaphoreCreateInfo semaphore_create_info = {
VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO, // VkStructureType sType
nullptr, // const void* pNext
0 // VkSemaphoreCreateFlags flags
};
if( (vkCreateSemaphore( Vulkan.Device, &semaphore_create_info, nullptr, &Vulkan.ImageAvailableSemaphore ) != VK_SUCCESS) ||
(vkCreateSemaphore( Vulkan.Device, &semaphore_create_info, nullptr, &Vulkan.RenderingFinishedSemaphore ) != VK_SUCCESS) ) {
printf( "Could not create semaphores!\n" );
return false;
}
return true;
}
bool VulkanCommon::CheckExtensionAvailability( const char *extension_name, const std::vector<VkExtensionProperties> &available_extensions ) {
for( size_t i = 0; i < available_extensions.size(); ++i ) {
if( strcmp( available_extensions[i].extensionName, extension_name ) == 0 ) {
return true;
}
}
return false;
}
uint32_t VulkanCommon::GetSwapChainNumImages( VkSurfaceCapabilitiesKHR &surface_capabilities ) {
// Set of images defined in a swap chain may not always be available for application to render to:
// One may be displayed and one may wait in a queue to be presented
// If application wants to use more images at the same time it must ask for more images
uint32_t image_count = surface_capabilities.minImageCount + 1;
if( (surface_capabilities.maxImageCount > 0) &&
(image_count > surface_capabilities.maxImageCount) ) {
image_count = surface_capabilities.maxImageCount;
}
return image_count;
}
VkSurfaceFormatKHR VulkanCommon::GetSwapChainFormat( std::vector<VkSurfaceFormatKHR> &surface_formats ) {
// If the list contains only one entry with undefined format
// it mean that there are no preferred surface formats and any can be choosen
if( (surface_formats.size() == 1) &&
(surface_formats[0].format == VK_FORMAT_UNDEFINED) ) {
return{ VK_FORMAT_R8G8B8A8_UNORM, VK_COLORSPACE_SRGB_NONLINEAR_KHR };
}
// Check if list contains most widely used R8 G8 B8 A8 format
// with nonlinear color space
for( VkSurfaceFormatKHR &surface_format : surface_formats ) {
if( surface_format.format == VK_FORMAT_R8G8B8A8_UNORM ) {
return surface_format;
}
}
// Return the first format from the list
return surface_formats[0];
}
VkExtent2D VulkanCommon::GetSwapChainExtent( VkSurfaceCapabilitiesKHR &surface_capabilities ) {
// Special value of surface extent is width == height == -1
// If this is so we define the size by ourselves but it must fit within defined confines
if( surface_capabilities.currentExtent.width == -1 ) {
VkExtent2D swap_chain_extent = { 640, 480 };
if( swap_chain_extent.width < surface_capabilities.minImageExtent.width ) {
swap_chain_extent.width = surface_capabilities.minImageExtent.width;
}
if( swap_chain_extent.height < surface_capabilities.minImageExtent.height ) {
swap_chain_extent.height = surface_capabilities.minImageExtent.height;
}
if( swap_chain_extent.width > surface_capabilities.maxImageExtent.width ) {
swap_chain_extent.width = surface_capabilities.maxImageExtent.width;
}
if( swap_chain_extent.height > surface_capabilities.maxImageExtent.height ) {
swap_chain_extent.height = surface_capabilities.maxImageExtent.height;
}
return swap_chain_extent;
}
// Most of the cases we define size of the swap_chain images equal to current window's size
return surface_capabilities.currentExtent;
}
VkImageUsageFlags VulkanCommon::GetSwapChainUsageFlags( VkSurfaceCapabilitiesKHR &surface_capabilities ) {
// Color attachment flag must always be supported
// We can define other usage flags but we always need to check if they are supported
if( surface_capabilities.supportedUsageFlags & VK_IMAGE_USAGE_TRANSFER_DST_BIT ) {
return VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
}
return 0;
}
VkSurfaceTransformFlagBitsKHR VulkanCommon::GetSwapChainTransform( VkSurfaceCapabilitiesKHR &surface_capabilities ) {
// Sometimes images must be transformed before they are presented (i.e. due to device's orienation
// being other than default orientation)
// If the specified transform is other than current transform, presentation engine will transform image
// during presentation operation; this operation may hit performance on some platforms
// Here we don't want any transformations to occur so if no transform is supported use it
// otherwise just use the same transform as current transform
if( surface_capabilities.supportedTransforms & VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR ) {
return VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
} else {
return surface_capabilities.currentTransform;
}
}
VkPresentModeKHR VulkanCommon::GetSwapChainPresentMode( std::vector<VkPresentModeKHR> &present_modes ) {
// FIFO present mode is always available
// MAILBOX is the lowest latency V-Sync enabled mode (something like triple-buffering) so use it if available
for( VkPresentModeKHR &present_mode : present_modes ) {
if( present_mode == VK_PRESENT_MODE_MAILBOX_KHR ) {
return present_mode;
}
}
return VK_PRESENT_MODE_FIFO_KHR;
}
VulkanCommon::~VulkanCommon() {
if( Vulkan.Device != VK_NULL_HANDLE ) {
vkDeviceWaitIdle( Vulkan.Device );
if( Vulkan.ImageAvailableSemaphore != VK_NULL_HANDLE ) {
vkDestroySemaphore( Vulkan.Device, Vulkan.ImageAvailableSemaphore, nullptr );
}
if( Vulkan.RenderingFinishedSemaphore != VK_NULL_HANDLE ) {
vkDestroySemaphore( Vulkan.Device, Vulkan.RenderingFinishedSemaphore, nullptr );
}
if( Vulkan.SwapChain.Handle != VK_NULL_HANDLE ) {
vkDestroySwapchainKHR( Vulkan.Device, Vulkan.SwapChain.Handle, nullptr );
}
vkDestroyDevice( Vulkan.Device, nullptr );
}
if( Vulkan.PresentationSurface != VK_NULL_HANDLE ) {
vkDestroySurfaceKHR( Vulkan.Instance, Vulkan.PresentationSurface, nullptr );
}
if( Vulkan.Instance != VK_NULL_HANDLE ) {
vkDestroyInstance( Vulkan.Instance, nullptr );
}
if( VulkanLibrary ) {
#if defined(VK_USE_PLATFORM_WIN32_KHR)
FreeLibrary( VulkanLibrary );
#elif defined(VK_USE_PLATFORM_XCB_KHR) || defined(VK_USE_PLATFORM_XLIB_KHR)
dlclose( VulkanLibrary );
#endif
}
}
} // namespace Tutorial
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