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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "window.h"
#include <QPlatformSurfaceEvent>
#if QT_CONFIG(vulkan)
extern QVulkanInstance *instance;
#endif
Window::Window(const QString &title, GraphicsApi api)
{
switch (api) {
case OpenGL:
setSurfaceType(OpenGLSurface);
break;
case Vulkan:
setSurfaceType(VulkanSurface);
#if QT_CONFIG(vulkan)
setVulkanInstance(instance);
#endif
break;
case D3D11:
case D3D12:
setSurfaceType(Direct3DSurface);
break;
case Metal:
setSurfaceType(MetalSurface);
break;
default:
break;
}
resize(800, 600);
setTitle(title);
}
Window::~Window()
{
}
void Window::exposeEvent(QExposeEvent *)
{
if (isExposed()) {
if (!m_running) {
// initialize and start rendering when the window becomes usable for graphics purposes
m_running = true;
m_notExposed = false;
emit initRequested();
emit renderRequested(true);
} else {
// continue when exposed again
if (m_notExposed) {
m_notExposed = false;
emit renderRequested(true);
} else {
// resize generates exposes - this is very important here (unlike in a single-threaded renderer)
emit syncSurfaceSizeRequested();
}
}
} else {
// stop pushing frames when not exposed (on some platforms this is essential, optional on others)
if (m_running)
m_notExposed = true;
}
}
bool Window::event(QEvent *e)
{
switch (e->type()) {
case QEvent::UpdateRequest:
if (!m_notExposed)
emit renderRequested(false);
break;
case QEvent::PlatformSurface:
// this is the proper time to tear down the swapchain (while the native window and surface are still around)
if (static_cast<QPlatformSurfaceEvent *>(e)->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed)
emit surfaceGoingAway();
break;
default:
break;
}
return QWindow::event(e);
}
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