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https://github.com/moonlight-stream/moonlight-qt.git
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6f4ced5ed6
This can be overriden with GL_IS_SLOW=0 at runtime for systems with a fast GPU, though it doesn't make much difference either way for non-KMSDRM cases. For slower GPUs, this enables important scaling and rendering optimizations that can substantially improve performance (especially on fillrate-limited GPUs common in SBCs).
263 lines
7.6 KiB
C++
263 lines
7.6 KiB
C++
#include <QtGlobal>
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#include <QDir>
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#include "utils.h"
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#include "SDL_compat.h"
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#ifdef HAS_X11
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#include <X11/Xlib.h>
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#endif
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#ifdef HAS_WAYLAND
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#include <wayland-client.h>
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#endif
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#ifdef HAVE_DRM
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#endif
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#ifdef HAVE_EGL
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#include <EGL/egl.h>
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#ifndef EGL_PLATFORM_X11_KHR
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#define EGL_PLATFORM_X11_KHR 0x31D5
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#endif
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#ifndef EGL_PLATFORM_GBM_KHR
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#define EGL_PLATFORM_GBM_KHR 0x31D7
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#endif
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#endif
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#define VALUE_SET 0x01
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#define VALUE_TRUE 0x02
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bool WMUtils::isRunningX11()
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{
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#ifdef HAS_X11
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static SDL_atomic_t isRunningOnX11;
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// If the value is not set yet, populate it now.
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int val = SDL_AtomicGet(&isRunningOnX11);
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if (!(val & VALUE_SET)) {
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Display* display = XOpenDisplay(nullptr);
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if (display != nullptr) {
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XCloseDisplay(display);
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}
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// Populate the value to return and have for next time.
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// This can race with another thread populating the same data,
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// but that's no big deal.
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val = VALUE_SET | ((display != nullptr) ? VALUE_TRUE : 0);
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SDL_AtomicSet(&isRunningOnX11, val);
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}
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return !!(val & VALUE_TRUE);
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#else
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return false;
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#endif
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}
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bool WMUtils::isRunningNvidiaProprietaryDriverX11()
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{
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#ifdef HAVE_EGL
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static SDL_atomic_t isRunningOnNvidiaDriver;
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// If the value is not set yet, populate it now.
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int val = SDL_AtomicGet(&isRunningOnNvidiaDriver);
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if (!(val & VALUE_SET)) {
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bool nvidiaDriver = false;
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// Open the default X11 display. This is critical for accurate detection of the
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// Nvidia driver under XWayland because eglGetDisplay(EGL_DEFAULT_DISPLAY) will
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// return the Wayland display but Qt will use the X11 display.
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EGLDisplay display = eglGetPlatformDisplay(EGL_PLATFORM_X11_KHR, EGL_DEFAULT_DISPLAY, nullptr);
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if (display != EGL_NO_DISPLAY && eglInitialize(display, nullptr, nullptr)) {
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const char* vendorString = eglQueryString(display, EGL_VENDOR);
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nvidiaDriver = vendorString && strstr(vendorString, "NVIDIA") != NULL;
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eglTerminate(display);
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}
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// Populate the value to return and have for next time.
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// This can race with another thread populating the same data,
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// but that's no big deal.
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val = VALUE_SET | (nvidiaDriver ? VALUE_TRUE : 0);
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SDL_AtomicSet(&isRunningOnNvidiaDriver, val);
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}
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return !!(val & VALUE_TRUE);
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#else
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return false;
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#endif
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}
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bool WMUtils::supportsDesktopGLWithEGL()
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{
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#ifdef HAVE_EGL
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static SDL_atomic_t supportsDesktopGL;
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// If the value is not set yet, populate it now.
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int val = SDL_AtomicGet(&supportsDesktopGL);
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if (!(val & VALUE_SET)) {
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// Assume it does if we can't confirm
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bool desktopGL = true;
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// Prefer GBM as some drivers (pvr) use swrast/llvmpipe for X11/XWayland,
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// so we'll get a different (and incorrect) result if we query X11.
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EGLDisplay display = eglGetPlatformDisplay(EGL_PLATFORM_GBM_KHR, EGL_DEFAULT_DISPLAY, nullptr);
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if (display == EGL_NO_DISPLAY) {
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display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
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}
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if (display != EGL_NO_DISPLAY && eglInitialize(display, nullptr, nullptr)) {
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EGLint matchingConfigs = 0;
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EGLint const attribs[] =
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{
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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EGL_NONE
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};
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desktopGL = eglChooseConfig(display, attribs, nullptr, 0, &matchingConfigs) == EGL_TRUE &&
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matchingConfigs > 0;
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eglTerminate(display);
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}
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// Populate the value to return and have for next time.
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// This can race with another thread populating the same data,
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// but that's no big deal.
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val = VALUE_SET | (desktopGL ? VALUE_TRUE : 0);
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SDL_AtomicSet(&supportsDesktopGL, val);
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}
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return !!(val & VALUE_TRUE);
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#else
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// Assume it does if we can't check ourselves
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return true;
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#endif
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}
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bool WMUtils::isRunningWayland()
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{
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#ifdef HAS_WAYLAND
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static SDL_atomic_t isRunningOnWayland;
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// If the value is not set yet, populate it now.
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int val = SDL_AtomicGet(&isRunningOnWayland);
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if (!(val & VALUE_SET)) {
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struct wl_display* display = nullptr;
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// We need to avoid the default fallback to wayland-0 that wl_display_connect()
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// will try for cases where we might be running from a TTY with a Wayland
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// compositor running in another VT that happens to use the wayland-0 name.
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if (!qEnvironmentVariableIsEmpty("WAYLAND_DISPLAY") ||
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!qEnvironmentVariableIsEmpty("WAYLAND_SOCKET") ||
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qgetenv("XDG_SESSION_TYPE") == "wayland") {
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// This looks like it might be a Wayland environment, so give it a shot
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display = wl_display_connect(nullptr);
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if (display != nullptr) {
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wl_display_disconnect(display);
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}
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}
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// Populate the value to return and have for next time.
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// This can race with another thread populating the same data,
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// but that's no big deal.
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val = VALUE_SET | ((display != nullptr) ? VALUE_TRUE : 0);
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SDL_AtomicSet(&isRunningOnWayland, val);
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}
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return !!(val & VALUE_TRUE);
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#else
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return false;
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#endif
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}
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bool WMUtils::isRunningWindowManager()
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{
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#if defined(Q_OS_WIN) || defined(Q_OS_DARWIN)
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// Windows and macOS are always running a window manager
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return true;
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#else
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// On Unix OSes, look for Wayland or X
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return WMUtils::isRunningWayland() || WMUtils::isRunningX11();
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#endif
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}
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bool WMUtils::isRunningDesktopEnvironment()
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{
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bool value;
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if (Utils::getEnvironmentVariableOverride("HAS_DESKTOP_ENVIRONMENT", &value)) {
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return value;
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}
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#if defined(Q_OS_WIN) || defined(Q_OS_DARWIN)
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// Windows and macOS are always running a desktop environment
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return true;
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#elif defined(EMBEDDED_BUILD)
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// Embedded systems don't run desktop environments
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return false;
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#else
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// On non-embedded systems, assume we have a desktop environment
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// if we have a WM running.
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return isRunningWindowManager();
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#endif
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}
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bool WMUtils::isGpuSlow()
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{
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bool ret;
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if (!Utils::getEnvironmentVariableOverride("GL_IS_SLOW", &ret)) {
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#if defined(GL_IS_SLOW) || !defined(Q_PROCESSOR_X86)
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// We currently assume GPUs on non-x86 hardware are slow by default
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ret = true;
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#else
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ret = false;
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#endif
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}
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return ret;
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}
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QString WMUtils::getDrmCardOverride()
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{
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#ifdef HAVE_DRM
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QDir dir("/dev/dri");
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QStringList cardList = dir.entryList(QStringList("card*"), QDir::Files | QDir::System);
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if (cardList.length() == 0) {
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return QString();
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}
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bool needsOverride = false;
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for (const QString& card : cardList) {
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QFile cardFd(dir.filePath(card));
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if (!cardFd.open(QFile::ReadOnly)) {
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continue;
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}
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auto resources = drmModeGetResources(cardFd.handle());
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if (resources == nullptr) {
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// If we find a card that doesn't have a display before a card that
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// has one, we'll need to override Qt's EGLFS config because they
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// don't properly handle cards without displays.
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needsOverride = true;
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}
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else {
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// We found a card with a display
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drmModeFreeResources(resources);
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if (needsOverride) {
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// Override the default card with this one
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return dir.filePath(card);
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}
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else {
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return QString();
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}
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}
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}
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#endif
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return QString();
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}
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