QVulkanFunctions 類提供跨平颱訪問實例級核心 Vulkan 1.0 API。 更多...
| 頭： | #include <QVulkanFunctions> |
| qmake: | QT += gui |
| Since: | Qt 5.10 |
該類在 Qt 5.10 引入。
默認情況下，Qt 和 Qt 應用程序未鏈接到任何 Vulkan 庫。相反，在運行時動態解析所有函數。每個 QVulkanInstance 提供 QVulkanFunctions 可檢索對象憑藉 QVulkanInstance::functions (). This does not contain device level functions in order to avoid the potential overhead of an internal dispatching. Instead, functions that rely on a device, or a dispatchable child object of a device, are exposed via QVulkanDeviceFunctions and QVulkanInstance::deviceFunctions ()。QVulkanFunctions 和 QVulkanDeviceFunctions together provides access to the full core Vulkan API, excluding any extensions.
注意： 不可以直接構造 QVulkanFunctions 實例。
典型用法如下：
void Window::render()
{
QVulkanInstance *inst = vulkanInstance();
QVulkanFunctions *f = inst->functions();
...
VkResult err = f->vkAllocateCommandBuffers(device, &cmdBufInfo, &cmdBuf);
...
}
注意： Windowing system interface (WSI) specifics and extensions are excluded. This class only covers core Vulkan commands, with the exception of instance creation, destruction, and function resolving, since such functionality is covered by QVulkanInstance 本身。
要訪問額外函數，應用程序可以使用 QVulkanInstance::getInstanceProcAddr () and vkGetDeviceProcAddr(). Applications can also decide to link to a Vulkan library directly, as platforms with an appropriate loader will typically export function symbols for the core commands. See vkGetInstanceProcAddr 手冊頁 瞭解更多信息。
另請參閱 QVulkanInstance , QVulkanDeviceFunctions , QWindow::setVulkanInstance ()，和 QWindow::setSurfaceType ().