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// Copyright (C) 2016 The Qt Company Ltd.
// Copyright (C) 2016 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include "qeglfskmsegldeviceintegration.h"
#include "qeglfskmsegldevice.h"
#include "qeglfskmsegldevicescreen.h"
#include <QtGui/private/qeglconvenience_p.h>
#include "private/qeglfswindow_p.h"
#include "private/qeglfscursor_p.h"
#include <QLoggingCategory>
#include <private/qmath_p.h>
QT_BEGIN_NAMESPACE
QEglFSKmsEglDeviceIntegration::QEglFSKmsEglDeviceIntegration()
: m_egl_device(EGL_NO_DEVICE_EXT)
, m_funcs(nullptr)
{
qCDebug(qLcEglfsKmsDebug, "New DRM/KMS on EGLDevice integration created");
}
QSurfaceFormat QEglFSKmsEglDeviceIntegration::surfaceFormatFor(const QSurfaceFormat &inputFormat) const
{
QSurfaceFormat format = QEglFSKmsIntegration::surfaceFormatFor(inputFormat);
format.setAlphaBufferSize(8);
return format;
}
EGLint QEglFSKmsEglDeviceIntegration::surfaceType() const
{
return EGL_STREAM_BIT_KHR;
}
EGLDisplay QEglFSKmsEglDeviceIntegration::createDisplay(EGLNativeDisplayType nativeDisplay)
{
qCDebug(qLcEglfsKmsDebug, "Creating display");
EGLDisplay display;
EGLint egldevice_fd = device()->fd();
const EGLint attribs[] = { EGL_DRM_MASTER_FD_EXT, egldevice_fd, EGL_NONE };
if (m_funcs->has_egl_platform_device) {
display = m_funcs->get_platform_display(EGL_PLATFORM_DEVICE_EXT, nativeDisplay, attribs);
} else {
qWarning("EGL_EXT_platform_device not available, falling back to legacy path!");
display = eglGetDisplay(nativeDisplay);
}
if (Q_UNLIKELY(display == EGL_NO_DISPLAY))
qFatal("Could not get EGL display");
EGLint major, minor;
if (Q_UNLIKELY(!eglInitialize(display, &major, &minor)))
qFatal("Could not initialize egl display");
if (Q_UNLIKELY(!eglBindAPI(EGL_OPENGL_ES_API)))
qFatal("Failed to bind EGL_OPENGL_ES_API\n");
return display;
}
bool QEglFSKmsEglDeviceIntegration::supportsSurfacelessContexts() const
{
// Returning false disables the usage of EGL_KHR_surfaceless_context even when the
// extension is available. This is just what we need since, at least with NVIDIA
// 352.00 making a null surface current with a context breaks.
return false;
}
bool QEglFSKmsEglDeviceIntegration::supportsPBuffers() const
{
return true;
}
class QEglFSKmsEglDeviceWindow : public QEglFSWindow
{
public:
QEglFSKmsEglDeviceWindow(QWindow *w, const QEglFSKmsEglDeviceIntegration *integration)
: QEglFSWindow(w)
, m_integration(integration)
, m_egl_stream(EGL_NO_STREAM_KHR)
{ }
~QEglFSKmsEglDeviceWindow() { destroy(); }
void invalidateSurface() override;
void resetSurface() override;
const QEglFSKmsEglDeviceIntegration *m_integration;
EGLStreamKHR m_egl_stream;
EGLint m_latency;
};
void QEglFSKmsEglDeviceWindow::invalidateSurface()
{
QEglFSWindow::invalidateSurface();
m_integration->m_funcs->destroy_stream(screen()->display(), m_egl_stream);
}
void QEglFSKmsEglDeviceWindow::resetSurface()
{
qCDebug(qLcEglfsKmsDebug, "Creating stream");
EGLDisplay display = screen()->display();
EGLint streamAttribs[3];
int streamAttribCount = 0;
int fifoLength = qEnvironmentVariableIntValue("QT_QPA_EGLFS_STREAM_FIFO_LENGTH");
if (fifoLength > 0) {
streamAttribs[streamAttribCount++] = EGL_STREAM_FIFO_LENGTH_KHR;
streamAttribs[streamAttribCount++] = fifoLength;
}
streamAttribs[streamAttribCount++] = EGL_NONE;
m_egl_stream = m_integration->m_funcs->create_stream(display, streamAttribs);
if (m_egl_stream == EGL_NO_STREAM_KHR) {
qWarning("resetSurface: Couldn't create EGLStream for native window");
return;
}
qCDebug(qLcEglfsKmsDebug, "Created stream %p on display %p", m_egl_stream, display);
EGLint count;
if (m_integration->m_funcs->query_stream(display, m_egl_stream, EGL_STREAM_FIFO_LENGTH_KHR, &count)) {
if (count > 0)
qCDebug(qLcEglfsKmsDebug, "Using EGLStream FIFO mode with %d frames", count);
else
qCDebug(qLcEglfsKmsDebug, "Using EGLStream mailbox mode");
} else {
qCDebug(qLcEglfsKmsDebug, "Could not query number of EGLStream FIFO frames");
}
if (!m_integration->m_funcs->get_output_layers(display, nullptr, nullptr, 0, &count) || count == 0) {
qWarning("No output layers found");
return;
}
qCDebug(qLcEglfsKmsDebug, "Output has %d layers", count);
QList<EGLOutputLayerEXT> layers;
layers.resize(count);
EGLint actualCount;
if (!m_integration->m_funcs->get_output_layers(display, nullptr, layers.data(), count, &actualCount)) {
qWarning("Failed to get layers");
return;
}
QEglFSKmsEglDeviceScreen *cur_screen = static_cast<QEglFSKmsEglDeviceScreen *>(screen());
Q_ASSERT(cur_screen);
QKmsOutput &output(cur_screen->output());
const uint32_t wantedId = !output.wants_forced_plane ? output.crtc_id : output.forced_plane_id;
qCDebug(qLcEglfsKmsDebug, "Searching for id: %d", wantedId);
EGLOutputLayerEXT layer = EGL_NO_OUTPUT_LAYER_EXT;
for (int i = 0; i < actualCount; ++i) {
EGLAttrib id;
if (m_integration->m_funcs->query_output_layer_attrib(display, layers[i], EGL_DRM_CRTC_EXT, &id)) {
qCDebug(qLcEglfsKmsDebug, " [%d] layer %p - crtc %d", i, layers[i], (int) id);
if (id == EGLAttrib(wantedId))
layer = layers[i];
} else if (m_integration->m_funcs->query_output_layer_attrib(display, layers[i], EGL_DRM_PLANE_EXT, &id)) {
qCDebug(qLcEglfsKmsDebug, " [%d] layer %p - plane %d", i, layers[i], (int) id);
if (id == EGLAttrib(wantedId))
layer = layers[i];
} else {
qCDebug(qLcEglfsKmsDebug, " [%d] layer %p - unknown", i, layers[i]);
}
}
QByteArray reqLayerIndex = qgetenv("QT_QPA_EGLFS_LAYER_INDEX");
if (!reqLayerIndex.isEmpty()) {
int idx = reqLayerIndex.toInt();
if (idx >= 0 && idx < layers.size()) {
qCDebug(qLcEglfsKmsDebug, "EGLOutput layer index override = %d", idx);
layer = layers[idx];
}
}
if (layer == EGL_NO_OUTPUT_LAYER_EXT) {
qWarning("resetSurface: Couldn't get EGLOutputLayer for native window");
return;
}
qCDebug(qLcEglfsKmsDebug, "Using layer %p", layer);
if (!m_integration->m_funcs->stream_consumer_output(display, m_egl_stream, layer))
qWarning("resetSurface: Unable to connect stream");
m_config = QEglFSDeviceIntegration::chooseConfig(display, m_integration->surfaceFormatFor(window()->requestedFormat()));
m_format = q_glFormatFromConfig(display, m_config);
qCDebug(qLcEglfsKmsDebug) << "Stream producer format is" << m_format;
const int w = cur_screen->rawGeometry().width();
const int h = cur_screen->rawGeometry().height();
qCDebug(qLcEglfsKmsDebug, "Creating stream producer surface of size %dx%d", w, h);
const EGLint stream_producer_attribs[] = {
EGL_WIDTH, w,
EGL_HEIGHT, h,
EGL_NONE
};
m_surface = m_integration->m_funcs->create_stream_producer_surface(display, m_config, m_egl_stream, stream_producer_attribs);
if (m_surface == EGL_NO_SURFACE)
return;
qCDebug(qLcEglfsKmsDebug, "Created stream producer surface %p", m_surface);
}
QEglFSWindow *QEglFSKmsEglDeviceIntegration::createWindow(QWindow *window) const
{
QEglFSKmsEglDeviceWindow *eglWindow = new QEglFSKmsEglDeviceWindow(window, this);
m_funcs->initialize(eglWindow->screen()->display());
if (Q_UNLIKELY(!(m_funcs->has_egl_output_base && m_funcs->has_egl_output_drm
&& m_funcs->has_egl_stream && m_funcs->has_egl_stream_producer_eglsurface
&& m_funcs->has_egl_stream_consumer_egloutput))) {
qCDebug(qLcEglfsKmsDebug, "EGL_EXTENSIONS %s",
eglQueryString(eglWindow->screen()->display(), EGL_EXTENSIONS));
qFatal("Required extensions missing!");
}
return eglWindow;
}
QKmsDevice *QEglFSKmsEglDeviceIntegration::createDevice()
{
if (Q_UNLIKELY(!query_egl_device()))
qFatal("Could not set up EGL device!");
QString path = screenConfig()->devicePath();
if (!path.isEmpty()) {
qCDebug(qLcEglfsKmsDebug) << "EGLDevice: Using DRM device" << path
<< "specified in config file";
} else {
path = QLatin1StringView(
m_funcs->query_device_string(m_egl_device, EGL_DRM_DEVICE_FILE_EXT));
if (Q_UNLIKELY(path.isEmpty()))
qFatal("Failed to query device name from EGLDevice");
}
return new QEglFSKmsEglDevice(this, screenConfig(), path);
}
bool QEglFSKmsEglDeviceIntegration::query_egl_device()
{
m_funcs = new QEGLStreamConvenience;
if (Q_UNLIKELY(!m_funcs->has_egl_device_base))
qFatal("EGL_EXT_device_base missing");
EGLint num_devices = 0;
if (m_funcs->query_devices(1, &m_egl_device, &num_devices) != EGL_TRUE) {
qWarning("eglQueryDevicesEXT failed: eglError: %x", eglGetError());
return false;
}
qCDebug(qLcEglfsKmsDebug, "Found %d EGL devices", num_devices);
if (num_devices < 1 || m_egl_device == EGL_NO_DEVICE_EXT) {
qWarning("eglQueryDevicesEXT could not find any EGL devices");
return false;
}
return true;
}
QPlatformCursor *QEglFSKmsEglDeviceIntegration::createCursor(QPlatformScreen *screen) const
{
#if QT_CONFIG(opengl)
if (screenConfig()->separateScreens())
return new QEglFSCursor(screen);
#else
Q_UNUSED(screen);
#endif
return nullptr;
}
QT_END_NAMESPACE