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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qeglfsemulatorintegration.h"
#include "qeglfsemulatorscreen.h"
#include "private/qeglfsintegration_p.h"
#include <private/qguiapplication_p.h>
#include <QtGui/private/qeglconvenience_p.h>
#include <QtGui/private/qeglplatformcontext_p.h>
#include <qpa/qwindowsysteminterface.h>
#include <QtCore/QJsonDocument>
#include <QtCore/QJsonArray>
#include <QtCore/QJsonParseError>
QT_BEGIN_NAMESPACE
QEglFSEmulatorIntegration::QEglFSEmulatorIntegration()
{
// The Qt Emulator provides the ability to render to multiple displays
// In addition to the usual EGL and OpenGLESv2 API's, there are also a
// few additional API's that enable the client (this plugin) to query
// the available screens and their properties, as well as the ability
// to select which screen is the active render target (as this is
// usually handled in a platform specific way and not by EGL itself).
getDisplays = reinterpret_cast<PFNQGSGETDISPLAYSPROC>(eglGetProcAddress("qgsGetDisplays"));
setDisplay = reinterpret_cast<PFNQGSSETDISPLAYPROC>(eglGetProcAddress("qgsSetDisplay"));
}
void QEglFSEmulatorIntegration::platformInit()
{
}
void QEglFSEmulatorIntegration::platformDestroy()
{
}
bool QEglFSEmulatorIntegration::usesDefaultScreen()
{
// This makes it possible to remotely query and then register our own set of screens
return false;
}
void QEglFSEmulatorIntegration::screenInit()
{
// Use qgsGetDisplays() call to retrieve the available screens from the Emulator
if (getDisplays) {
QByteArray displaysInfo = getDisplays();
QJsonParseError error;
QJsonDocument displaysDocument = QJsonDocument::fromJson(displaysInfo, &error);
if (error.error == QJsonParseError::NoError) {
// Document should be an array of screen objects
if (displaysDocument.isArray()){
QJsonArray screenArray = displaysDocument.array();
for (auto screenValue : screenArray) {
if (screenValue.isObject())
QWindowSystemInterface::handleScreenAdded(new QEglFSEmulatorScreen(screenValue.toObject()));
}
}
} else {
qWarning() << "eglfs_emu: Failed to parse display info JSON with error: " << error.errorString()
<< " at offset " << error.offset << " : " << displaysInfo;
}
} else {
qFatal("EGL library doesn't support Emulator extensions");
}
}
bool QEglFSEmulatorIntegration::hasCapability(QPlatformIntegration::Capability cap) const
{
switch (cap) {
case QPlatformIntegration::ThreadedPixmaps:
case QPlatformIntegration::OpenGL:
case QPlatformIntegration::ThreadedOpenGL:
return true;
default:
return false;
}
}
EGLNativeWindowType QEglFSEmulatorIntegration::createNativeWindow(QPlatformWindow *platformWindow,
const QSize &size,
const QSurfaceFormat &format)
{
Q_UNUSED(size);
Q_UNUSED(format);
QEglFSEmulatorScreen *screen = static_cast<QEglFSEmulatorScreen *>(platformWindow->screen());
if (screen && setDisplay) {
// Let the emulator know which screen the window surface is attached to
setDisplay(screen->id());
}
Q_CONSTINIT static QBasicAtomicInt uniqueWindowId = Q_BASIC_ATOMIC_INITIALIZER(0);
return EGLNativeWindowType(qintptr(1 + uniqueWindowId.fetchAndAddRelaxed(1)));
}
QT_END_NAMESPACE
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