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// Copyright (C) 2023 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 "qgraphicsframecapturemetal_p_p.h"
#include <QtCore/qurl.h>
#include "Metal/Metal.h"
#include "qglobal.h"
#include <QtGui/rhi/qrhi.h>
#include <QtGui/rhi/qrhi_platform.h>
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(lcGraphicsFrameCapture, "qt.gui.graphicsframecapture")
#if __has_feature(objc_arc)
#error ARC not supported
#endif
uint QGraphicsFrameCaptureMetal::frameNumber = 0;
QGraphicsFrameCaptureMetal::QGraphicsFrameCaptureMetal()
{
qputenv("METAL_CAPTURE_ENABLED", QByteArrayLiteral("1"));
m_captureDescriptor = [MTLCaptureDescriptor new];
}
QGraphicsFrameCaptureMetal::~QGraphicsFrameCaptureMetal()
{
#if defined(Q_OS_MACOS) && QT_CONFIG(process)
if (m_process) {
m_process->terminate();
delete m_process;
}
#endif
[m_captureDescriptor release];
}
void QGraphicsFrameCaptureMetal::setRhi(QRhi *rhi)
{
if (!rhi)
return;
QRhi::Implementation backend = rhi->backend();
const QRhiNativeHandles *nh = rhi->nativeHandles();
switch (backend) {
case QRhi::Implementation::Metal: {
const QRhiMetalNativeHandles *mtlnh = static_cast<const QRhiMetalNativeHandles *>(nh);
if (mtlnh->cmdQueue) {
m_captureDescriptor.captureObject = mtlnh->cmdQueue;
} else if (mtlnh->dev) {
m_captureDescriptor.captureObject = mtlnh->dev;
} else {
qCWarning(lcGraphicsFrameCapture) << "No valid Metal Device or Metal Command Queue found";
m_initialized = false;
return;
}
break;
}
default: {
qCWarning(lcGraphicsFrameCapture) << "Invalid handles were provided. MTLCaptureManager works only with Metal API";
m_initialized = false;
return;
break;
}
}
if (!m_captureManager) {
m_captureManager = MTLCaptureManager.sharedCaptureManager;
bool supportDocs = [m_captureManager supportsDestination:MTLCaptureDestinationGPUTraceDocument];
if (supportDocs) {
m_captureDescriptor.destination = MTLCaptureDestinationGPUTraceDocument;
m_initialized = true;
}
}
}
void QGraphicsFrameCaptureMetal::startCaptureFrame()
{
if (!initialized()) {
qCWarning(lcGraphicsFrameCapture) << "Capturing on Metal was not initialized. Starting capturing can not be done.";
return;
}
if (isCapturing()) {
qCWarning(lcGraphicsFrameCapture) << "A frame capture is already in progress,"
"will not initiate another one until QGraphicsFrameCapture::endCaptureFrame is called.";
return;
}
updateCaptureFileName();
NSError *error;
if (![m_captureManager startCaptureWithDescriptor:m_captureDescriptor error:&error]) {
QString errorMsg = QString::fromNSString(error.localizedDescription);
qCWarning(lcGraphicsFrameCapture, "Failed to start capture : %s", qPrintable(errorMsg));
}
}
void QGraphicsFrameCaptureMetal::endCaptureFrame()
{
if (!initialized()) {
qCWarning(lcGraphicsFrameCapture) << "Capturing on Metal was not initialized. End capturing can not be done.";
return;
}
if (!isCapturing()) {
qCWarning(lcGraphicsFrameCapture) << "A call to QGraphicsFrameCapture::endCaptureFrame can not be done"
" without a call to QGraphicsFrameCapture::startCaptureFrame";
return;
}
[m_captureManager stopCapture];
m_capturedFilesNames.append(QString::fromNSString(m_traceURL.path));
frameNumber++;
}
bool QGraphicsFrameCaptureMetal::initialized() const
{
return m_initialized;
}
bool QGraphicsFrameCaptureMetal::isCapturing() const
{
if (!initialized()) {
qCWarning(lcGraphicsFrameCapture) << "Capturing on Metal was not initialized. Can not query if capturing is in progress or not.";
return false;
}
return [m_captureManager isCapturing];
}
void QGraphicsFrameCaptureMetal::openCapture()
{
#if defined(Q_OS_MACOS)
#if !QT_CONFIG(process)
qFatal("QGraphicsFrameCapture requires QProcess on macOS");
#else
if (!initialized()) {
qCWarning(lcGraphicsFrameCapture) << "Capturing on Metal was not initialized. Can not open XCode with a valid capture.";
return;
}
if (!m_process) {
m_process = new QProcess();
m_process->setProgram(QStringLiteral("xed"));
QStringList args;
args.append(QUrl::fromNSURL(m_traceURL).toLocalFile());
m_process->setArguments(args);
}
m_process->kill();
m_process->start();
#endif
#endif
}
void QGraphicsFrameCaptureMetal::updateCaptureFileName()
{
m_traceURL = QUrl::fromLocalFile(m_capturePath + "/" + m_capturePrefix + "_" + QString::number(frameNumber) + ".gputrace").toNSURL();
// We need to remove the trace file if it already existed else MTLCaptureManager
// will fail to.
if ([NSFileManager.defaultManager fileExistsAtPath:m_traceURL.path])
[NSFileManager.defaultManager removeItemAtURL:m_traceURL error:nil];
m_captureDescriptor.outputURL = m_traceURL;
}
QT_END_NAMESPACE
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