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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QGuiApplication>
#include <QVulkanFunctions>
#include <QVulkanInstance>
#include <QWindow>
namespace src_gui_vulkan_qvulkaninstance {
struct Window {
void setVulkanInstance(QVulkanInstance *instance) { Q_UNUSED(instance); }
void show();
};
Window *window = nullptr;
//! [0]
int main(int argc, char **argv)
{
QGuiApplication app(argc, argv);
QVulkanInstance inst;
if (!inst.create())
return 1;
// ...
window->setVulkanInstance(&inst);
window->show();
return app.exec();
}
//! [0]
void wrapper0() {
//! [1]
QVulkanInstance inst;
// Enable validation layer, if supported. Messages go to qDebug by default.
inst.setLayers({ "VK_LAYER_KHRONOS_validation" });
bool ok = inst.create();
if (!ok) {
// ... Vulkan not available
}
if (!inst.layers().contains("VK_LAYER_KHRONOS_validation")) {
// ... validation layer not available
}
//! [1]
}
void wrapper1() {
//! [2]
QVulkanInstance inst;
if (inst.supportedLayers().contains("VK_LAYER_KHRONOS_validation")) {
// ...
}
bool ok = inst.create();
// ...
//! [2]
Q_UNUSED(ok);
} // wrapper1
} // src_gui_vulkan_qvulkaninstance
namespace src_gui_vulkan_qvulkaninstance2 {
//! [3]
class VulkanWindow : public QWindow
{
public:
VulkanWindow() {
setSurfaceType(VulkanSurface);
}
void exposeEvent(QExposeEvent *) {
if (isExposed()) {
if (!m_initialized) {
m_initialized = true;
// initialize device, swapchain, etc.
QVulkanInstance *inst = vulkanInstance();
QVulkanFunctions *f = inst->functions();
uint32_t devCount = 0;
f->vkEnumeratePhysicalDevices(inst->vkInstance(), &devCount, nullptr);
// ...
// build the first frame
render();
}
}
}
bool event(QEvent *e) {
if (e->type() == QEvent::UpdateRequest)
render();
return QWindow::event(e);
}
void render() {
// ...
requestUpdate(); // render continuously
}
private:
bool m_initialized = false;
};
int main(int argc, char **argv)
{
QGuiApplication app(argc, argv);
QVulkanInstance inst;
if (!inst.create()) {
qWarning("Vulkan not available");
return 1;
}
VulkanWindow window;
window.showMaximized();
return app.exec();
}
//! [3]
} // src_gui_vulkan_qvulkaninstance2
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