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# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from argparse import ArgumentParser, RawDescriptionHelpFormatter
import sys
from PySide6.QtCore import QCoreApplication
from PySide6.QtGui import QGuiApplication, QRhi, QSurfaceFormat
from rhiwindow import HelloWindow
import rc_rhiwindow # noqa: F401
if __name__ == "__main__":
app = QGuiApplication(sys.argv)
# Use platform-specific defaults when no command-line arguments given.
graphicsApi = QRhi.OpenGLES2
if sys.platform == "win32":
graphicsApi = QRhi.D3D11
elif sys.platform == "darwin":
graphicsApi = QRhi.Metal
parser = ArgumentParser(formatter_class=RawDescriptionHelpFormatter,
description="QRhi render example")
parser.add_argument("--null", "-n", action="store_true", help="Null")
parser.add_argument("--opengl", "-g", action="store_true", help="OpenGL")
parser.add_argument("--d3d11", "-d", action="store_true",
help="Direct3D 11")
parser.add_argument("--d3d12", "-D", action="store_true",
help="Direct3D 12")
parser.add_argument("--metal", "-m", action="store_true",
help="Metal")
args = parser.parse_args()
if args.null:
graphicsApi = QRhi.Null
elif args.opengl:
graphicsApi = QRhi.OpenGLES2
elif args.d3d11:
graphicsApi = QRhi.D3D11
elif args.d3d12:
graphicsApi = QRhi.D3D12
elif args.metal:
graphicsApi = QRhi.Metal
# graphicsApi = QRhi.Vulkan? detect? needs QVulkanInstance
# For OpenGL, to ensure there is a depth/stencil buffer for the window.
# With other APIs this is under the application's control
# (QRhiRenderBuffer etc.) and so no special setup is needed for those.
fmt = QSurfaceFormat()
fmt.setDepthBufferSize(24)
fmt.setStencilBufferSize(8)
# Special case macOS to allow using OpenGL there.
# (the default Metal is the recommended approach, though)
# gl_VertexID is a GLSL 130 feature, and so the default OpenGL 2.1 context
# we get on macOS is not sufficient.
if sys.platform == "darwin":
fmt.setVersion(4, 1)
fmt.setProfile(QSurfaceFormat.CoreProfile)
QSurfaceFormat.setDefaultFormat(fmt)
window = HelloWindow(graphicsApi)
window.resize(1280, 720)
title = QCoreApplication.applicationName() + " - " + window.graphicsApiName()
window.setTitle(title)
window.show()
ret = app.exec()
# RhiWindow::event() will not get invoked when the
# PlatformSurfaceAboutToBeDestroyed event is sent during the QWindow
# destruction. That happens only when exiting via app::quit() instead of
# the more common QWindow::close(). Take care of it: if the QPlatformWindow
# is still around (there was no close() yet), get rid of the swapchain
# while it's not too late.
if window.isVisible():
window.releaseSwapChain()
sys.exit(ret)
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