OpenGLDevice: Support both XCB and Xlib

Required for NVIDIA+XWayland.

CMakeModules/DuckStationDependencies.cmake

@@ -28,8 +28,8 @@ endif()
 
 if(ENABLE_X11)
   find_package(X11 REQUIRED)
-  if (NOT X11_Xrandr_FOUND)
+  if (NOT X11_xcb_FOUND OR NOT X11_xcb_randr_FOUND OR NOT X11_X11_xcb_FOUND)
-    message(FATAL_ERROR "XRandR extension is required")
+    message(FATAL_ERROR "XCB, XCB-randr and X11-xcb are required")
   endif()
 endif()
 

src/duckstation-qt/displaywidget.cpp

@@ -58,9 +58,9 @@ int DisplayWidget::scaledWindowHeight() const
     static_cast<int>(std::ceil(static_cast<qreal>(height()) * QtUtils::GetDevicePixelRatioForWidget(this))), 1);
 }
 
-std::optional<WindowInfo> DisplayWidget::getWindowInfo(Error* error)
+std::optional<WindowInfo> DisplayWidget::getWindowInfo(RenderAPI render_api, Error* error)
 {
-  std::optional<WindowInfo> ret(QtUtils::GetWindowInfoForWidget(this, error));
+  std::optional<WindowInfo> ret = QtUtils::GetWindowInfoForWidget(this, render_api, error);
   if (ret.has_value())
   {
     m_last_window_width = ret->surface_width;

src/duckstation-qt/displaywidget.h

@@ -13,6 +13,8 @@
 
 class Error;
 
+enum class RenderAPI : u8;
+
 class QCloseEvent;
 
 class DisplayWidget final : public QWidget
@@ -28,7 +30,7 @@ public:
   int scaledWindowWidth() const;
   int scaledWindowHeight() const;
 
-  std::optional<WindowInfo> getWindowInfo(Error* error);
+  std::optional<WindowInfo> getWindowInfo(RenderAPI render_api, Error* error);
 
   void updateRelativeMode(bool enabled);
   void updateCursor(bool hidden);

src/duckstation-qt/mainwindow.cpp

@@ -221,8 +221,8 @@ bool MainWindow::nativeEvent(const QByteArray& eventType, void* message, qintptr
 
 #endif
 
-std::optional<WindowInfo> MainWindow::acquireRenderWindow(bool fullscreen, bool render_to_main, bool surfaceless,
+std::optional<WindowInfo> MainWindow::acquireRenderWindow(RenderAPI render_api, bool fullscreen, bool render_to_main,
-                                                          bool use_main_window_pos, Error* error)
+                                                          bool surfaceless, bool use_main_window_pos, Error* error)
 {
   DEV_LOG("acquireRenderWindow() fullscreen={} render_to_main={} surfaceless={} use_main_window_pos={}",
           fullscreen ? "true" : "false", render_to_main ? "true" : "false", surfaceless ? "true" : "false",
@@ -265,7 +265,7 @@ std::optional<WindowInfo> MainWindow::acquireRenderWindow(bool fullscreen, bool
     updateWindowState();
 
     QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
-    return m_display_widget->getWindowInfo(error);
+    return m_display_widget->getWindowInfo(render_api, error);
   }
 
   destroyDisplayWidget(surfaceless);
@@ -277,7 +277,7 @@ std::optional<WindowInfo> MainWindow::acquireRenderWindow(bool fullscreen, bool
 
   createDisplayWidget(fullscreen, render_to_main, use_main_window_pos);
 
-  std::optional<WindowInfo> wi = m_display_widget->getWindowInfo(error);
+  std::optional<WindowInfo> wi = m_display_widget->getWindowInfo(render_api, error);
   if (!wi.has_value())
   {
     QMessageBox::critical(this, tr("Error"), tr("Failed to get window info from widget"));
@@ -2483,9 +2483,9 @@ void MainWindow::checkForSettingChanges()
 std::optional<WindowInfo> MainWindow::getWindowInfo()
 {
   if (!m_display_widget || isRenderingToMain())
-    return QtUtils::GetWindowInfoForWidget(this);
+    return QtUtils::GetWindowInfoForWidget(this, RenderAPI::None);
   else if (QWidget* widget = getDisplayContainer())
-    return QtUtils::GetWindowInfoForWidget(widget);
+    return QtUtils::GetWindowInfoForWidget(widget, RenderAPI::None);
   else
     return std::nullopt;
 }
@@ -2565,7 +2565,7 @@ void MainWindow::onAchievementsChallengeModeChanged(bool enabled)
   updateEmulationActions(false, System::IsValid(), enabled);
 }
 
-bool MainWindow::onCreateAuxiliaryRenderWindow(qint32 x, qint32 y, quint32 width, quint32 height, const QString& title,
+bool MainWindow::onCreateAuxiliaryRenderWindow(RenderAPI render_api, qint32 x, qint32 y, quint32 width, quint32 height, const QString& title,
                                                const QString& icon_name, Host::AuxiliaryRenderWindowUserData userdata,
                                                Host::AuxiliaryRenderWindowHandle* handle, WindowInfo* wi, Error* error)
 {
@@ -2573,7 +2573,7 @@ bool MainWindow::onCreateAuxiliaryRenderWindow(qint32 x, qint32 y, quint32 width
   if (!widget)
     return false;
 
-  const std::optional<WindowInfo> owi = QtUtils::GetWindowInfoForWidget(widget, error);
+  const std::optional<WindowInfo> owi = QtUtils::GetWindowInfoForWidget(widget, render_api, error);
   if (!owi.has_value())
   {
     widget->destroy();

src/duckstation-qt/mainwindow.h

@@ -35,6 +35,7 @@ class MemoryScannerWindow;
 
 struct SystemBootParameters;
 
+enum class RenderAPI : u8;
 class GPUDevice;
 namespace Achievements {
 enum class LoginRequestReason;
@@ -127,8 +128,8 @@ private Q_SLOTS:
   bool confirmMessage(const QString& title, const QString& message);
   void onStatusMessage(const QString& message);
 
-  std::optional<WindowInfo> acquireRenderWindow(bool fullscreen, bool render_to_main, bool surfaceless,
+  std::optional<WindowInfo> acquireRenderWindow(RenderAPI render_api, bool fullscreen, bool render_to_main,
-                                                bool use_main_window_pos, Error* error);
+                                                bool surfaceless, bool use_main_window_pos, Error* error);
   void displayResizeRequested(qint32 width, qint32 height);
   void releaseRenderWindow();
   void focusDisplayWidget();
@@ -145,8 +146,9 @@ private Q_SLOTS:
   void onMediaCaptureStopped();
   void onAchievementsLoginRequested(Achievements::LoginRequestReason reason);
   void onAchievementsChallengeModeChanged(bool enabled);
-  bool onCreateAuxiliaryRenderWindow(qint32 x, qint32 y, quint32 width, quint32 height, const QString& title,
+  bool onCreateAuxiliaryRenderWindow(RenderAPI render_api, qint32 x, qint32 y, quint32 width, quint32 height,
-                                     const QString& icon_name, Host::AuxiliaryRenderWindowUserData userdata,
+                                     const QString& title, const QString& icon_name,
+                                     Host::AuxiliaryRenderWindowUserData userdata,
                                      Host::AuxiliaryRenderWindowHandle* handle, WindowInfo* wi, Error* error);
   void onDestroyAuxiliaryRenderWindow(Host::AuxiliaryRenderWindowHandle handle, QPoint* pos, QSize* size);
 

src/duckstation-qt/qthost.cpp

@@ -133,6 +133,7 @@ void QtHost::RegisterTypes()
   qRegisterMetaType<std::function<void()>>("std::function<void()>");
   qRegisterMetaType<std::shared_ptr<SystemBootParameters>>();
   qRegisterMetaType<const GameList::Entry*>();
+  qRegisterMetaType<RenderAPI>("RenderAPI");
   qRegisterMetaType<GPURenderer>("GPURenderer");
   qRegisterMetaType<InputBindingKey>("InputBindingKey");
   qRegisterMetaType<std::string>("std::string");
@@ -954,7 +955,8 @@ void EmuThread::requestDisplaySize(float scale)
   System::RequestDisplaySize(scale);
 }
 
-std::optional<WindowInfo> EmuThread::acquireRenderWindow(bool fullscreen, bool exclusive_fullscreen, Error* error)
+std::optional<WindowInfo> EmuThread::acquireRenderWindow(RenderAPI render_api, bool fullscreen,
+                                                         bool exclusive_fullscreen, Error* error)
 {
   DebugAssert(g_gpu_device);
 
@@ -964,8 +966,8 @@ std::optional<WindowInfo> EmuThread::acquireRenderWindow(bool fullscreen, bool e
   const bool render_to_main = !fullscreen && m_is_rendering_to_main;
   const bool use_main_window_pos = shouldRenderToMain();
 
-  return emit onAcquireRenderWindowRequested(window_fullscreen, render_to_main, m_is_surfaceless, use_main_window_pos,
+  return emit onAcquireRenderWindowRequested(render_api, window_fullscreen, render_to_main, m_is_surfaceless,
-                                             error);
+                                             use_main_window_pos, error);
 }
 
 void EmuThread::releaseRenderWindow()
@@ -1655,9 +1657,9 @@ bool Host::CreateAuxiliaryRenderWindow(s32 x, s32 y, u32 width, u32 height, std:
                                        std::string_view icon_name, AuxiliaryRenderWindowUserData userdata,
                                        AuxiliaryRenderWindowHandle* handle, WindowInfo* wi, Error* error)
 {
-  return emit g_emu_thread->onCreateAuxiliaryRenderWindow(x, y, width, height, QtUtils::StringViewToQString(title),
+  return emit g_emu_thread->onCreateAuxiliaryRenderWindow(
-                                                          QtUtils::StringViewToQString(icon_name), userdata, handle, wi,
+    g_gpu_device->GetRenderAPI(), x, y, width, height, QtUtils::StringViewToQString(title),
-                                                          error);
+    QtUtils::StringViewToQString(icon_name), userdata, handle, wi, error);
 }
 
 void Host::DestroyAuxiliaryRenderWindow(AuxiliaryRenderWindowHandle handle, s32* pos_x, s32* pos_y, u32* width,
@@ -2002,7 +2004,7 @@ void Host::CommitBaseSettingChanges()
 std::optional<WindowInfo> Host::AcquireRenderWindow(RenderAPI render_api, bool fullscreen, bool exclusive_fullscreen,
                                                     Error* error)
 {
-  return g_emu_thread->acquireRenderWindow(fullscreen, exclusive_fullscreen, error);
+  return g_emu_thread->acquireRenderWindow(render_api, fullscreen, exclusive_fullscreen, error);
 }
 
 void Host::ReleaseRenderWindow()

src/duckstation-qt/qthost.h

@@ -41,6 +41,7 @@ class QTranslator;
 
 class INISettingsInterface;
 
+enum class RenderAPI : u8;
 class GPUDevice;
 
 class MainWindow;
@@ -94,7 +95,8 @@ public:
   ALWAYS_INLINE bool isSurfaceless() const { return m_is_surfaceless; }
   ALWAYS_INLINE bool isRunningFullscreenUI() const { return m_run_fullscreen_ui; }
 
-  std::optional<WindowInfo> acquireRenderWindow(bool fullscreen, bool exclusive_fullscreen, Error* error);
+  std::optional<WindowInfo> acquireRenderWindow(RenderAPI render_api, bool fullscreen, bool exclusive_fullscreen,
+                                                Error* error);
   void connectDisplaySignals(DisplayWidget* widget);
   void releaseRenderWindow();
 
@@ -137,8 +139,8 @@ Q_SIGNALS:
   void systemPaused();
   void systemResumed();
   void gameListRefreshed();
-  std::optional<WindowInfo> onAcquireRenderWindowRequested(bool fullscreen, bool render_to_main, bool surfaceless,
+  std::optional<WindowInfo> onAcquireRenderWindowRequested(RenderAPI render_api, bool fullscreen, bool render_to_main,
-                                                           bool use_main_window_pos, Error* error);
+                                                           bool surfaceless, bool use_main_window_pos, Error* error);
   void onResizeRenderWindowRequested(qint32 width, qint32 height);
   void onReleaseRenderWindowRequested();
   void focusDisplayWidgetRequested();
@@ -153,8 +155,9 @@ Q_SIGNALS:
   void mediaCaptureStarted();
   void mediaCaptureStopped();
 
-  bool onCreateAuxiliaryRenderWindow(qint32 x, qint32 y, quint32 width, quint32 height, const QString& title,
+  bool onCreateAuxiliaryRenderWindow(RenderAPI render_api, qint32 x, qint32 y, quint32 width, quint32 height,
-                                     const QString& icon_name, Host::AuxiliaryRenderWindowUserData userdata,
+                                     const QString& title, const QString& icon_name,
+                                     Host::AuxiliaryRenderWindowUserData userdata,
                                      Host::AuxiliaryRenderWindowHandle* handle, WindowInfo* wi, Error* error);
   void onDestroyAuxiliaryRenderWindow(Host::AuxiliaryRenderWindowHandle handle, QPoint* pos, QSize* size);
 

src/duckstation-qt/qtutils.cpp

@@ -7,6 +7,8 @@
 #include "core/game_list.h"
 #include "core/system.h"
 
+#include "util/gpu_device.h"
+
 #include "common/error.h"
 #include "common/log.h"
 
@@ -30,6 +32,8 @@
 #include <QtWidgets/QTreeView>
 #include <algorithm>
 #include <array>
+#include <cstdlib>
+#include <cstring>
 #include <map>
 
 #if !defined(_WIN32) && !defined(APPLE)
@@ -317,7 +321,7 @@ qreal QtUtils::GetDevicePixelRatioForWidget(const QWidget* widget)
   return screen_for_ratio ? screen_for_ratio->devicePixelRatio() : static_cast<qreal>(1);
 }
 
-std::optional<WindowInfo> QtUtils::GetWindowInfoForWidget(QWidget* widget, Error* error)
+std::optional<WindowInfo> QtUtils::GetWindowInfoForWidget(QWidget* widget, RenderAPI render_api, Error* error)
 {
   WindowInfo wi;
 
@@ -333,8 +337,20 @@ std::optional<WindowInfo> QtUtils::GetWindowInfoForWidget(QWidget* widget, Error
   const QString platform_name = QGuiApplication::platformName();
   if (platform_name == QStringLiteral("xcb"))
   {
-    wi.type = WindowInfo::Type::X11;
+    // This is fucking ridiculous. NVIDIA+XWayland doesn't support Xlib, and NVIDIA+Xorg doesn't support XCB.
+    // Use Xlib if we're not running under Wayland, or we're not requesting OpenGL. Vulkan+XCB seems fine.
+    const char* xdg_session_type = std::getenv("XDG_SESSION_TYPE");
+    const bool is_running_on_xwayland = (xdg_session_type && std::strstr(xdg_session_type, "wayland"));
+    if (is_running_on_xwayland || render_api == RenderAPI::Vulkan)
+    {
+      wi.type = WindowInfo::Type::XCB;
+      wi.display_connection = pni->nativeResourceForWindow("connection", widget->windowHandle());
+    }
+    else
+    {
+      wi.type = WindowInfo::Type::Xlib;
       wi.display_connection = pni->nativeResourceForWindow("display", widget->windowHandle());
+    }
     wi.window_handle = reinterpret_cast<void*>(widget->winId());
   }
   else if (platform_name == QStringLiteral("wayland"))
@@ -356,9 +372,12 @@ std::optional<WindowInfo> QtUtils::GetWindowInfoForWidget(QWidget* widget, Error
   wi.surface_scale = static_cast<float>(dpr);
 
   // Query refresh rate, we need it for sync.
-  std::optional<float> surface_refresh_rate = WindowInfo::QueryRefreshRateForWindow(wi);
+  Error refresh_rate_error;
+  std::optional<float> surface_refresh_rate = WindowInfo::QueryRefreshRateForWindow(wi, &refresh_rate_error);
   if (!surface_refresh_rate.has_value())
   {
+    WARNING_LOG("Failed to get refresh rate for window, falling back to Qt: {}", refresh_rate_error.GetDescription());
+
     // Fallback to using the screen, getting the rate for Wayland is an utter mess otherwise.
     const QScreen* widget_screen = widget->screen();
     if (!widget_screen)

src/duckstation-qt/qtutils.h

@@ -32,6 +32,8 @@ class QVariant;
 class QWidget;
 class QUrl;
 
+enum class RenderAPI : u8;
+
 enum class ConsoleRegion : u8;
 enum class DiscRegion : u8;
 namespace GameDatabase {
@@ -116,7 +118,7 @@ QIcon GetIconForCompatibility(GameDatabase::CompatibilityRating rating);
 qreal GetDevicePixelRatioForWidget(const QWidget* widget);
 
 /// Returns the common window info structure for a Qt widget.
-std::optional<WindowInfo> GetWindowInfoForWidget(QWidget* widget, Error* error = nullptr);
+std::optional<WindowInfo> GetWindowInfoForWidget(QWidget* widget, RenderAPI render_api, Error* error = nullptr);
 
 /// Saves a window's geometry to configuration. Returns false if the configuration was changed.
 bool SaveWindowGeometry(std::string_view window_name, QWidget* widget, bool auto_commit_changes = true);

src/util/CMakeLists.txt

@@ -80,8 +80,12 @@ target_link_libraries(util PUBLIC common simpleini imgui)
 target_link_libraries(util PRIVATE libchdr lzma JPEG::JPEG PNG::PNG WebP::libwebp lunasvg::lunasvg ZLIB::ZLIB SoundTouch::SoundTouchDLL xxhash Zstd::Zstd reshadefx)
 
 if(ENABLE_X11)
+  target_sources(util PRIVATE
+    x11_tools.cpp
+    x11_tools.h
+  )
   target_compile_definitions(util PRIVATE "-DENABLE_X11=1")
-  target_link_libraries(util PRIVATE X11::X11 X11::Xrandr)
+  target_link_libraries(util PRIVATE X11::xcb X11::xcb_randr X11::X11_xcb)
 endif()
 
 if(ENABLE_WAYLAND)
@@ -121,8 +125,10 @@ if(ENABLE_OPENGL)
 
     if(ENABLE_X11)
       target_sources(util PRIVATE
-        opengl_context_egl_x11.cpp
+        opengl_context_egl_xcb.cpp
-        opengl_context_egl_x11.h
+        opengl_context_egl_xcb.h
+        opengl_context_egl_xlib.cpp
+        opengl_context_egl_xlib.h
       )
     endif()
     if(ENABLE_WAYLAND)

src/util/opengl_context.cpp

@@ -27,7 +27,8 @@
 #include "opengl_context_egl_wayland.h"
 #endif
 #ifdef ENABLE_X11
-#include "opengl_context_egl_x11.h"
+#include "opengl_context_egl_xcb.h"
+#include "opengl_context_egl_xlib.h"
 #endif
 #endif
 #endif
@@ -154,8 +155,10 @@ std::unique_ptr<OpenGLContext> OpenGLContext::Create(WindowInfo& wi, SurfaceHand
   context = OpenGLContextEGLAndroid::Create(wi, surface, versions_to_try, error);
 #else
 #if defined(ENABLE_X11)
-  if (wi.type == WindowInfo::Type::X11)
+  if (wi.type == WindowInfo::Type::Xlib)
-    context = OpenGLContextEGLX11::Create(wi, surface, versions_to_try, error);
+    context = OpenGLContextEGLXlib::Create(wi, surface, versions_to_try, error);
+  else if (wi.type == WindowInfo::Type::XCB)
+    context = OpenGLContextEGLXCB::Create(wi, surface, versions_to_try, error);
 #endif
 #if defined(ENABLE_WAYLAND)
   if (wi.type == WindowInfo::Type::Wayland)

src/util/opengl_context_egl_xcb.cpp

@@ -0,0 +1,105 @@
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: CC-BY-NC-ND-4.0
+
+#include "opengl_context_egl_xcb.h"
+
+#include "common/error.h"
+#include "common/log.h"
+
+LOG_CHANNEL(GPUDevice);
+
+OpenGLContextEGLXCB::OpenGLContextEGLXCB() = default;
+
+OpenGLContextEGLXCB::~OpenGLContextEGLXCB() = default;
+
+std::unique_ptr<OpenGLContext> OpenGLContextEGLXCB::Create(WindowInfo& wi, SurfaceHandle* surface,
+                                                           std::span<const Version> versions_to_try, Error* error)
+{
+  std::unique_ptr<OpenGLContextEGLXCB> context = std::make_unique<OpenGLContextEGLXCB>();
+  if (!context->Initialize(wi, surface, versions_to_try, error))
+    return nullptr;
+
+  return context;
+}
+
+std::unique_ptr<OpenGLContext> OpenGLContextEGLXCB::CreateSharedContext(WindowInfo& wi, SurfaceHandle* surface,
+                                                                        Error* error)
+{
+  std::unique_ptr<OpenGLContextEGLXCB> context = std::make_unique<OpenGLContextEGLXCB>();
+  context->m_display = m_display;
+
+  if (!context->CreateContextAndSurface(wi, surface, m_version, m_context, false, error))
+    return nullptr;
+
+  return context;
+}
+
+EGLDisplay OpenGLContextEGLXCB::GetPlatformDisplay(const WindowInfo& wi, Error* error)
+{
+  EGLDisplay dpy = TryGetPlatformDisplay(wi.display_connection, EGL_PLATFORM_XCB_EXT, "EGL_EXT_platform_xcb");
+  m_using_platform_display = (dpy != EGL_NO_DISPLAY);
+  if (!m_using_platform_display)
+    dpy = GetFallbackDisplay(wi.display_connection, error);
+
+  return dpy;
+}
+
+EGLSurface OpenGLContextEGLXCB::CreatePlatformSurface(EGLConfig config, const WindowInfo& wi, Error* error)
+{
+  // Try YOLO'ing it, if the depth/visual is compatible we don't need to create a subwindow.
+  // Seems to be the case with Mesa, but not on NVIDIA.
+  xcb_window_t xcb_window = static_cast<xcb_window_t>(reinterpret_cast<uintptr_t>(wi.window_handle));
+  EGLSurface surface = m_using_platform_display ? TryCreatePlatformSurface(config, &xcb_window, error) :
+                                                  CreateFallbackSurface(config, wi.window_handle, error);
+  if (surface != EGL_NO_SURFACE)
+  {
+    // Yay, no subwindow.
+    return surface;
+  }
+
+  // Why do we need this shit? XWayland on NVIDIA....
+  EGLint native_visual_id = 0;
+  if (!eglGetConfigAttrib(m_display, m_config, EGL_NATIVE_VISUAL_ID, &native_visual_id))
+  {
+    Error::SetStringView(error, "Failed to get XCB visual ID");
+    return EGL_NO_SURFACE;
+  }
+
+  X11Window subwindow;
+  if (!subwindow.Create(static_cast<xcb_connection_t*>(wi.display_connection), xcb_window,
+                        static_cast<xcb_visualid_t>(native_visual_id), error))
+  {
+    Error::AddPrefix(error, "Failed to create subwindow");
+    return EGL_NO_SURFACE;
+  }
+
+  // This is hideous.. the EXT version requires a pointer to the window, whereas the base
+  // version requires the window itself, casted to void*...
+  surface = TryCreatePlatformSurface(config, subwindow.GetWindowPtr(), error);
+  if (surface == EGL_NO_SURFACE)
+    surface = CreateFallbackSurface(config, wi.window_handle, error);
+
+  if (surface != EGL_NO_SURFACE)
+  {
+    DEV_LOG("Created {}x{} subwindow with visual ID {}", subwindow.GetWidth(), subwindow.GetHeight(), native_visual_id);
+    m_x11_windows.emplace(surface, std::move(subwindow));
+  }
+
+  return surface;
+}
+
+void OpenGLContextEGLXCB::DestroyPlatformSurface(EGLSurface surface)
+{
+  OpenGLContextEGL::DestroyPlatformSurface(surface);
+
+  auto it = m_x11_windows.find((EGLSurface)surface);
+  if (it != m_x11_windows.end())
+    m_x11_windows.erase(it);
+}
+
+void OpenGLContextEGLXCB::ResizeSurface(WindowInfo& wi, SurfaceHandle handle)
+{
+  const auto it = m_x11_windows.find((EGLSurface)handle);
+  if (it != m_x11_windows.end())
+    it->second.Resize(wi.surface_width, wi.surface_height);
+}

src/util/opengl_context_egl_xcb.h

@@ -0,0 +1,34 @@
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: CC-BY-NC-ND-4.0
+
+#pragma once
+
+#include "opengl_context_egl.h"
+#include "x11_tools.h"
+
+#include <unordered_map>
+
+class OpenGLContextEGLXCB final : public OpenGLContextEGL
+{
+public:
+  OpenGLContextEGLXCB();
+  ~OpenGLContextEGLXCB() override;
+
+  static std::unique_ptr<OpenGLContext> Create(WindowInfo& wi, SurfaceHandle* surface,
+                                               std::span<const Version> versions_to_try, Error* error);
+
+  std::unique_ptr<OpenGLContext> CreateSharedContext(WindowInfo& wi, SurfaceHandle* surface, Error* error) override;
+
+  void ResizeSurface(WindowInfo& wi, SurfaceHandle handle) override;
+
+protected:
+  EGLDisplay GetPlatformDisplay(const WindowInfo& wi, Error* error) override;
+  EGLSurface CreatePlatformSurface(EGLConfig config, const WindowInfo& wi, Error* error) override;
+  void DestroyPlatformSurface(EGLSurface surface) override;
+
+private:
+  using X11WindowMap = std::unordered_map<EGLSurface, X11Window>;
+
+  X11WindowMap m_x11_windows;
+  bool m_using_platform_display = false;
+};

src/util/opengl_context_egl_xlib.cpp

@@ -1,28 +1,28 @@
 // SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
 // SPDX-License-Identifier: CC-BY-NC-ND-4.0
 
-#include "opengl_context_egl_x11.h"
+#include "opengl_context_egl_xlib.h"
 
 #include "common/error.h"
 
-OpenGLContextEGLX11::OpenGLContextEGLX11() = default;
+OpenGLContextEGLXlib::OpenGLContextEGLXlib() = default;
 
-OpenGLContextEGLX11::~OpenGLContextEGLX11() = default;
+OpenGLContextEGLXlib::~OpenGLContextEGLXlib() = default;
 
-std::unique_ptr<OpenGLContext> OpenGLContextEGLX11::Create(WindowInfo& wi, SurfaceHandle* surface,
+std::unique_ptr<OpenGLContext> OpenGLContextEGLXlib::Create(WindowInfo& wi, SurfaceHandle* surface,
                                                             std::span<const Version> versions_to_try, Error* error)
 {
-  std::unique_ptr<OpenGLContextEGLX11> context = std::make_unique<OpenGLContextEGLX11>();
+  std::unique_ptr<OpenGLContextEGLXlib> context = std::make_unique<OpenGLContextEGLXlib>();
   if (!context->Initialize(wi, surface, versions_to_try, error))
     return nullptr;
 
   return context;
 }
 
-std::unique_ptr<OpenGLContext> OpenGLContextEGLX11::CreateSharedContext(WindowInfo& wi, SurfaceHandle* surface,
+std::unique_ptr<OpenGLContext> OpenGLContextEGLXlib::CreateSharedContext(WindowInfo& wi, SurfaceHandle* surface,
                                                                          Error* error)
 {
-  std::unique_ptr<OpenGLContextEGLX11> context = std::make_unique<OpenGLContextEGLX11>();
+  std::unique_ptr<OpenGLContextEGLXlib> context = std::make_unique<OpenGLContextEGLXlib>();
   context->m_display = m_display;
 
   if (!context->CreateContextAndSurface(wi, surface, m_version, m_context, false, error))
@@ -31,7 +31,7 @@ std::unique_ptr<OpenGLContext> OpenGLContextEGLX11::CreateSharedContext(WindowIn
   return context;
 }
 
-EGLDisplay OpenGLContextEGLX11::GetPlatformDisplay(const WindowInfo& wi, Error* error)
+EGLDisplay OpenGLContextEGLXlib::GetPlatformDisplay(const WindowInfo& wi, Error* error)
 {
   EGLDisplay dpy = TryGetPlatformDisplay(wi.display_connection, EGL_PLATFORM_X11_KHR, "EGL_EXT_platform_x11");
   if (dpy == EGL_NO_DISPLAY)
@@ -40,7 +40,7 @@ EGLDisplay OpenGLContextEGLX11::GetPlatformDisplay(const WindowInfo& wi, Error*
   return dpy;
 }
 
-EGLSurface OpenGLContextEGLX11::CreatePlatformSurface(EGLConfig config, const WindowInfo& wi, Error* error)
+EGLSurface OpenGLContextEGLXlib::CreatePlatformSurface(EGLConfig config, const WindowInfo& wi, Error* error)
 {
   // This is hideous.. the EXT version requires a pointer to the window, whereas the base
   // version requires the window itself, casted to void*...

src/util/opengl_context_egl_xlib.h

@@ -5,11 +5,11 @@
 
 #include "opengl_context_egl.h"
 
-class OpenGLContextEGLX11 final : public OpenGLContextEGL
+class OpenGLContextEGLXlib final : public OpenGLContextEGL
 {
 public:
-  OpenGLContextEGLX11();
+  OpenGLContextEGLXlib();
-  ~OpenGLContextEGLX11() override;
+  ~OpenGLContextEGLXlib() override;
 
   static std::unique_ptr<OpenGLContext> Create(WindowInfo& wi, SurfaceHandle* surface,
                                                std::span<const Version> versions_to_try, Error* error);

src/util/platform_misc.h

@@ -25,5 +25,5 @@ std::optional<WindowInfo> GetTopLevelWindowInfo();
 // TODO: Move all the other Cocoa stuff in here.
 namespace CocoaTools {
 /// Returns the refresh rate of the display the window is placed on.
-std::optional<float> GetViewRefreshRate(const WindowInfo& wi);
+std::optional<float> GetViewRefreshRate(const WindowInfo& wi, Error* error);
-}
+} // namespace CocoaTools

src/util/platform_misc_mac.mm

@@ -129,12 +129,12 @@ void CocoaTools::DestroyMetalLayer(const WindowInfo& wi, void* layer)
   [clayer release];
 }
 
-std::optional<float> CocoaTools::GetViewRefreshRate(const WindowInfo& wi)
+std::optional<float> CocoaTools::GetViewRefreshRate(const WindowInfo& wi, Error* error)
 {
   if (![NSThread isMainThread])
   {
     std::optional<float> ret;
-    dispatch_sync(dispatch_get_main_queue(), [&ret, wi] { ret = GetViewRefreshRate(wi); });
+    dispatch_sync(dispatch_get_main_queue(), [&ret, wi, error] { ret = GetViewRefreshRate(wi, error); });
     return ret;
   }
 
@@ -146,6 +146,10 @@ std::optional<float> CocoaTools::GetViewRefreshRate(const WindowInfo& wi)
     ret = CGDisplayModeGetRefreshRate(mode);
     CGDisplayModeRelease(mode);
   }
+  else
+  {
+    Error::SetStringView(error, "CGDisplayCopyDisplayMode() failed");
+  }
 
   return ret;
 }

src/util/util.vcxproj

@@ -57,7 +57,10 @@
     <ClInclude Include="opengl_context_egl_wayland.h">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClInclude>
-    <ClInclude Include="opengl_context_egl_x11.h">
+    <ClInclude Include="opengl_context_egl_xcb.h">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClInclude>
+    <ClInclude Include="opengl_context_egl_xlib.h">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClInclude>
     <ClInclude Include="opengl_context_wgl.h">
@@ -101,6 +104,9 @@
     <ClInclude Include="wav_reader_writer.h" />
     <ClInclude Include="win32_raw_input_source.h" />
     <ClInclude Include="window_info.h" />
+    <ClInclude Include="x11_tools.h">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClInclude>
     <ClInclude Include="xinput_source.h" />
   </ItemGroup>
   <ItemGroup>
@@ -159,7 +165,10 @@
     <ClCompile Include="opengl_context_egl_wayland.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
-    <ClCompile Include="opengl_context_egl_x11.cpp">
+    <ClCompile Include="opengl_context_egl_xcb.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="opengl_context_egl_xlib.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="opengl_context_wgl.cpp">
@@ -202,6 +211,9 @@
     <ClCompile Include="wav_reader_writer.cpp" />
     <ClCompile Include="win32_raw_input_source.cpp" />
     <ClCompile Include="window_info.cpp" />
+    <ClCompile Include="x11_tools.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="xinput_source.cpp" />
   </ItemGroup>
   <ItemGroup>

src/util/util.vcxproj.filters

@@ -66,13 +66,15 @@
     <ClInclude Include="opengl_context_agl.h" />
     <ClInclude Include="opengl_context_egl.h" />
     <ClInclude Include="opengl_context_egl_wayland.h" />
-    <ClInclude Include="opengl_context_egl_x11.h" />
+    <ClInclude Include="opengl_context_egl_xcb.h" />
     <ClInclude Include="opengl_context_wgl.h" />
     <ClInclude Include="image.h" />
     <ClInclude Include="sockets.h" />
     <ClInclude Include="media_capture.h" />
     <ClInclude Include="compress_helpers.h" />
     <ClInclude Include="elf_file.h" />
+    <ClInclude Include="x11_tools.h" />
+    <ClInclude Include="opengl_context_egl_xlib.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="state_wrapper.cpp" />
@@ -146,7 +148,7 @@
     <ClCompile Include="opengl_context.cpp" />
     <ClCompile Include="opengl_context_egl.cpp" />
     <ClCompile Include="opengl_context_egl_wayland.cpp" />
-    <ClCompile Include="opengl_context_egl_x11.cpp" />
+    <ClCompile Include="opengl_context_egl_xcb.cpp" />
     <ClCompile Include="opengl_context_wgl.cpp" />
     <ClCompile Include="image.cpp" />
     <ClCompile Include="sdl_audio_stream.cpp" />
@@ -154,6 +156,8 @@
     <ClCompile Include="media_capture.cpp" />
     <ClCompile Include="compress_helpers.cpp" />
     <ClCompile Include="elf_file.cpp" />
+    <ClCompile Include="x11_tools.cpp" />
+    <ClCompile Include="opengl_context_egl_xlib.cpp" />
   </ItemGroup>
   <ItemGroup>
     <None Include="metal_shaders.metal" />

src/util/vulkan_device.cpp

@@ -248,8 +248,8 @@ bool VulkanDevice::SelectInstanceExtensions(ExtensionList* extension_list, const
   if (wi.type == WindowInfo::Type::Win32 && !SupportsExtension(VK_KHR_WIN32_SURFACE_EXTENSION_NAME, true))
     return false;
 #endif
-#if defined(VK_USE_PLATFORM_XLIB_KHR)
+#if defined(VK_USE_PLATFORM_XCB_KHR)
-  if (wi.type == WindowInfo::Type::X11 && !SupportsExtension(VK_KHR_XLIB_SURFACE_EXTENSION_NAME, true))
+  if (wi.type == WindowInfo::Type::XCB && !SupportsExtension(VK_KHR_XCB_SURFACE_EXTENSION_NAME, true))
     return false;
 #endif
 #if defined(VK_USE_PLATFORM_WAYLAND_KHR)

src/util/vulkan_entry_points.inl

@@ -40,12 +40,10 @@ VULKAN_INSTANCE_ENTRY_POINT(vkGetPhysicalDeviceSurfacePresentModesKHR, false)
 
 #if defined(VK_USE_PLATFORM_WIN32_KHR)
 VULKAN_INSTANCE_ENTRY_POINT(vkCreateWin32SurfaceKHR, false)
-VULKAN_INSTANCE_ENTRY_POINT(vkGetPhysicalDeviceWin32PresentationSupportKHR, false)
 #endif
 
-#if defined(VK_USE_PLATFORM_XLIB_KHR)
+#if defined(VK_USE_PLATFORM_XCB_KHR)
-VULKAN_INSTANCE_ENTRY_POINT(vkCreateXlibSurfaceKHR, false)
+VULKAN_INSTANCE_ENTRY_POINT(vkCreateXcbSurfaceKHR, false)
-VULKAN_INSTANCE_ENTRY_POINT(vkGetPhysicalDeviceXlibPresentationSupportKHR, false)
 #endif
 
 #if defined(VK_USE_PLATFORM_WAYLAND_KHR)

src/util/vulkan_loader.h

@@ -18,7 +18,7 @@ class Error;
 #define VK_USE_PLATFORM_ANDROID_KHR
 #else
 #ifdef ENABLE_X11
-#define VK_USE_PLATFORM_XLIB_KHR
+#define VK_USE_PLATFORM_XCB_KHR
 #endif
 
 #ifdef ENABLE_WAYLAND
@@ -28,48 +28,6 @@ class Error;
 
 #include "vulkan/vulkan.h"
 
-#if defined(ENABLE_X11)
-
-// This breaks a bunch of our code. They shouldn't be #defines in the first place.
-#ifdef None
-#undef None
-#endif
-#ifdef Always
-#undef Always
-#endif
-#ifdef Status
-#undef Status
-#endif
-#ifdef CursorShape
-#undef CursorShape
-#endif
-#ifdef KeyPress
-#undef KeyPress
-#endif
-#ifdef KeyRelease
-#undef KeyRelease
-#endif
-#ifdef FocusIn
-#undef FocusIn
-#endif
-#ifdef FocusOut
-#undef FocusOut
-#endif
-#ifdef FontChange
-#undef FontChange
-#endif
-#ifdef Expose
-#undef Expose
-#endif
-#ifdef Unsorted
-#undef Unsorted
-#endif
-#ifdef Bool
-#undef Bool
-#endif
-
-#endif
-
 #include "vulkan_entry_points.h"
 
 // We include vk_mem_alloc globally, so we don't accidentally include it before the vulkan header somewhere.

src/util/vulkan_swap_chain.cpp

@@ -138,17 +138,17 @@ bool VulkanSwapChain::CreateSurface(VkInstance instance, VkPhysicalDevice physic
   }
 #endif
 
-#if defined(VK_USE_PLATFORM_XLIB_KHR)
+#if defined(VK_USE_PLATFORM_XCB_KHR)
-  if (m_window_info.type == WindowInfo::Type::X11)
+  if (m_window_info.type == WindowInfo::Type::XCB)
   {
-    const VkXlibSurfaceCreateInfoKHR surface_create_info = {
+    const VkXcbSurfaceCreateInfoKHR surface_create_info = {
-      .sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR,
+      .sType = VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR,
-      .dpy = static_cast<Display*>(m_window_info.display_connection),
+      .connection = static_cast<xcb_connection_t*>(m_window_info.display_connection),
-      .window = reinterpret_cast<Window>(m_window_info.window_handle)};
+      .window = static_cast<xcb_window_t>(reinterpret_cast<uintptr_t>(m_window_info.window_handle))};
-    const VkResult res = vkCreateXlibSurfaceKHR(instance, &surface_create_info, nullptr, &m_surface);
+    const VkResult res = vkCreateXcbSurfaceKHR(instance, &surface_create_info, nullptr, &m_surface);
     if (res != VK_SUCCESS)
     {
-      Vulkan::SetErrorObject(error, "vkCreateXlibSurfaceKHR failed: ", res);
+      Vulkan::SetErrorObject(error, "vkCreateXcbSurfaceKHR failed: ", res);
       return false;
     }
 

src/util/window_info.cpp

@@ -16,13 +16,13 @@ LOG_CHANNEL(WindowInfo);
 #include "common/windows_headers.h"
 #include <dwmapi.h>
 
-static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd)
+static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd, Error* error)
 {
   // Partially based on Chromium ui/display/win/display_config_helper.cc.
   const HMONITOR monitor = MonitorFromWindow(hwnd, 0);
   if (!monitor) [[unlikely]]
   {
-    ERROR_LOG("{}() failed: {}", "MonitorFromWindow", Error::CreateWin32(GetLastError()).GetDescription());
+    Error::SetWin32(error, "MonitorFromWindow() failed: ", GetLastError());
     return std::nullopt;
   }
 
@@ -30,7 +30,7 @@ static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd)
   mi.cbSize = sizeof(mi);
   if (!GetMonitorInfoW(monitor, &mi))
   {
-    ERROR_LOG("{}() failed: {}", "GetMonitorInfoW", Error::CreateWin32(GetLastError()).GetDescription());
+    Error::SetWin32(error, "GetMonitorInfoW() failed: ", GetLastError());
     return std::nullopt;
   }
 
@@ -44,7 +44,7 @@ static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd)
     LONG res = GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &path_size, &mode_size);
     if (res != ERROR_SUCCESS)
     {
-      ERROR_LOG("{}() failed: {}", "GetDisplayConfigBufferSizes", Error::CreateWin32(res).GetDescription());
+      Error::SetWin32(error, "GetDisplayConfigBufferSizes() failed: ", res);
       return std::nullopt;
     }
 
@@ -56,7 +56,7 @@ static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd)
       break;
     if (res != ERROR_INSUFFICIENT_BUFFER)
     {
-      ERROR_LOG("{}() failed: {}", "QueryDisplayConfig", Error::CreateWin32(res).GetDescription());
+      Error::SetWin32(error, "QueryDisplayConfig() failed: ", res);
       return std::nullopt;
     }
   }
@@ -70,7 +70,7 @@ static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd)
     LONG res = DisplayConfigGetDeviceInfo(&sdn.header);
     if (res != ERROR_SUCCESS)
     {
-      ERROR_LOG("{}() failed: {}", "DisplayConfigGetDeviceInfo", Error::CreateWin32(res).GetDescription());
+      Error::SetWin32(error, "DisplayConfigGetDeviceInfo() failed: ", res);
       continue;
     }
 
@@ -85,15 +85,19 @@ static std::optional<float> GetRefreshRateFromDisplayConfig(HWND hwnd)
   return std::nullopt;
 }
 
-static std::optional<float> GetRefreshRateFromDWM(HWND hwnd)
+static std::optional<float> GetRefreshRateFromDWM(HWND hwnd, Error* error)
 {
   BOOL composition_enabled;
-  if (FAILED(DwmIsCompositionEnabled(&composition_enabled)))
+  HRESULT hr = DwmIsCompositionEnabled(&composition_enabled);
+  if (FAILED(hr))
+  {
+    Error::SetHResult(error, "DwmIsCompositionEnabled() failed: ", hr);
     return std::nullopt;
+  }
 
   DWM_TIMING_INFO ti = {};
   ti.cbSize = sizeof(ti);
-  HRESULT hr = DwmGetCompositionTimingInfo(nullptr, &ti);
+  hr = DwmGetCompositionTimingInfo(nullptr, &ti);
   if (SUCCEEDED(hr))
   {
     if (ti.rateRefresh.uiNumerator == 0 || ti.rateRefresh.uiDenominator == 0)
@@ -101,15 +105,21 @@ static std::optional<float> GetRefreshRateFromDWM(HWND hwnd)
 
     return static_cast<float>(ti.rateRefresh.uiNumerator) / static_cast<float>(ti.rateRefresh.uiDenominator);
   }
-
+  else
+  {
+    Error::SetHResult(error, "DwmGetCompositionTimingInfo() failed: ", hr);
     return std::nullopt;
   }
+}
 
-static std::optional<float> GetRefreshRateFromMonitor(HWND hwnd)
+static std::optional<float> GetRefreshRateFromMonitor(HWND hwnd, Error* error)
 {
   HMONITOR mon = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
   if (!mon)
+  {
+    Error::SetWin32(error, "MonitorFromWindow() failed: ", GetLastError());
     return std::nullopt;
+  }
 
   MONITORINFOEXW mi = {};
   mi.cbSize = sizeof(mi);
@@ -120,26 +130,46 @@ static std::optional<float> GetRefreshRateFromMonitor(HWND hwnd)
 
     // 0/1 are reserved for "defaults".
     if (EnumDisplaySettingsW(mi.szDevice, ENUM_CURRENT_SETTINGS, &dm) && dm.dmDisplayFrequency > 1)
+    {
       return static_cast<float>(dm.dmDisplayFrequency);
     }
-
+    else
+    {
+      Error::SetWin32(error, "EnumDisplaySettingsW() failed: ", GetLastError());
       return std::nullopt;
     }
+  }
+  else
+  {
+    Error::SetWin32(error, "GetMonitorInfoW() failed: ", GetLastError());
+    return std::nullopt;
+  }
+}
 
-std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi)
+std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi, Error* error)
 {
   std::optional<float> ret;
   if (wi.type != Type::Win32 || !wi.window_handle)
+  {
+    Error::SetStringView(error, "Invalid window type.");
     return ret;
+  }
 
   // Try DWM first, then fall back to integer values.
   const HWND hwnd = static_cast<HWND>(wi.window_handle);
-  ret = GetRefreshRateFromDisplayConfig(hwnd);
+  Error local_error;
+  ret = GetRefreshRateFromDisplayConfig(hwnd, &local_error);
   if (!ret.has_value())
   {
-    ret = GetRefreshRateFromDWM(hwnd);
+    WARNING_LOG("GetRefreshRateFromDisplayConfig() failed: {}", local_error.GetDescription());
+
+    ret = GetRefreshRateFromDWM(hwnd, &local_error);
     if (!ret.has_value())
-      ret = GetRefreshRateFromMonitor(hwnd);
+    {
+      WARNING_LOG("GetRefreshRateFromDWM() failed: {}", local_error.GetDescription());
+
+      ret = GetRefreshRateFromMonitor(hwnd, error);
+    }
   }
 
   return ret;
@@ -149,157 +179,29 @@ std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi)
 
 #include "util/platform_misc.h"
 
-std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi)
+std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi, Error* error)
 {
   if (wi.type == WindowInfo::Type::MacOS)
-    return CocoaTools::GetViewRefreshRate(wi);
+    return CocoaTools::GetViewRefreshRate(wi, error);
 
+  Error::SetStringView(error, "Invalid window type.");
   return std::nullopt;
 }
 
 #else
 
 #ifdef ENABLE_X11
+#include "x11_tools.h"
+#endif
 
-#include <X11/Xlib.h>
+std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi, Error* error)
-#include <X11/Xutil.h>
-#include <X11/extensions/Xrandr.h>
-
-// Helper class for managing X errors
-namespace {
-class X11InhibitErrors;
-
-static X11InhibitErrors* s_current_error_inhibiter;
-
-class X11InhibitErrors
-{
-public:
-  X11InhibitErrors()
-  {
-    Assert(!s_current_error_inhibiter);
-    m_old_handler = XSetErrorHandler(ErrorHandler);
-    s_current_error_inhibiter = this;
-  }
-
-  ~X11InhibitErrors()
-  {
-    Assert(s_current_error_inhibiter == this);
-    s_current_error_inhibiter = nullptr;
-    XSetErrorHandler(m_old_handler);
-  }
-
-  ALWAYS_INLINE bool HadError() const { return m_had_error; }
-
-private:
-  static int ErrorHandler(Display* display, XErrorEvent* ee)
-  {
-    char error_string[256] = {};
-    XGetErrorText(display, ee->error_code, error_string, sizeof(error_string));
-    WARNING_LOG("X11 Error: {} (Error {} Minor {} Request {})", error_string, ee->error_code, ee->minor_code,
-                ee->request_code);
-
-    s_current_error_inhibiter->m_had_error = true;
-    return 0;
-  }
-
-  XErrorHandler m_old_handler = {};
-  bool m_had_error = false;
-};
-} // namespace
-
-static std::optional<float> GetRefreshRateFromXRandR(const WindowInfo& wi)
-{
-  Display* display = static_cast<Display*>(wi.display_connection);
-  Window window = static_cast<Window>(reinterpret_cast<uintptr_t>(wi.window_handle));
-  if (!display || !window)
-    return std::nullopt;
-
-  X11InhibitErrors inhibiter;
-
-  XRRScreenResources* res = XRRGetScreenResources(display, window);
-  if (!res)
-  {
-    ERROR_LOG("XRRGetScreenResources() failed");
-    return std::nullopt;
-  }
-
-  ScopedGuard res_guard([res]() { XRRFreeScreenResources(res); });
-
-  int num_monitors;
-  XRRMonitorInfo* mi = XRRGetMonitors(display, window, True, &num_monitors);
-  if (num_monitors < 0)
-  {
-    ERROR_LOG("XRRGetMonitors() failed");
-    return std::nullopt;
-  }
-  else if (num_monitors > 1)
-  {
-    WARNING_LOG("XRRGetMonitors() returned {} monitors, using first", num_monitors);
-  }
-
-  ScopedGuard mi_guard([mi]() { XRRFreeMonitors(mi); });
-  if (mi->noutput <= 0)
-  {
-    ERROR_LOG("Monitor has no outputs");
-    return std::nullopt;
-  }
-  else if (mi->noutput > 1)
-  {
-    WARNING_LOG("Monitor has {} outputs, using first", mi->noutput);
-  }
-
-  XRROutputInfo* oi = XRRGetOutputInfo(display, res, mi->outputs[0]);
-  if (!oi)
-  {
-    ERROR_LOG("XRRGetOutputInfo() failed");
-    return std::nullopt;
-  }
-
-  ScopedGuard oi_guard([oi]() { XRRFreeOutputInfo(oi); });
-
-  XRRCrtcInfo* ci = XRRGetCrtcInfo(display, res, oi->crtc);
-  if (!ci)
-  {
-    ERROR_LOG("XRRGetCrtcInfo() failed");
-    return std::nullopt;
-  }
-
-  ScopedGuard ci_guard([ci]() { XRRFreeCrtcInfo(ci); });
-
-  XRRModeInfo* mode = nullptr;
-  for (int i = 0; i < res->nmode; i++)
-  {
-    if (res->modes[i].id == ci->mode)
-    {
-      mode = &res->modes[i];
-      break;
-    }
-  }
-  if (!mode)
-  {
-    ERROR_LOG("Failed to look up mode {} (of {})", static_cast<int>(ci->mode), res->nmode);
-    return std::nullopt;
-  }
-
-  if (mode->dotClock == 0 || mode->hTotal == 0 || mode->vTotal == 0)
-  {
-    ERROR_LOG("Modeline is invalid: {}/{}/{}", mode->dotClock, mode->hTotal, mode->vTotal);
-    return std::nullopt;
-  }
-
-  return static_cast<float>(static_cast<double>(mode->dotClock) /
-                            (static_cast<double>(mode->hTotal) * static_cast<double>(mode->vTotal)));
-}
-
-#endif // ENABLE_X11
-
-std::optional<float> WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi)
 {
 #if defined(ENABLE_X11)
-  if (wi.type == WindowInfo::Type::X11)
+  if (wi.type == WindowInfo::Type::Xlib || wi.type == WindowInfo::Type::XCB)
-    return GetRefreshRateFromXRandR(wi);
+    return GetRefreshRateFromXRandR(wi, error);
 #endif
 
+  Error::SetStringView(error, "Invalid window type.");
   return std::nullopt;
 }
 

src/util/window_info.h

@@ -8,6 +8,8 @@
 
 #include <optional>
 
+class Error;
+
 // Contains the information required to create a graphics context in a window.
 struct WindowInfo
 {
@@ -15,7 +17,8 @@ struct WindowInfo
   {
     Surfaceless,
     Win32,
-    X11,
+    Xlib,
+    XCB,
     Wayland,
     MacOS,
     Android,
@@ -32,5 +35,5 @@ struct WindowInfo
 
   ALWAYS_INLINE bool IsSurfaceless() const { return type == Type::Surfaceless; }
 
-  static std::optional<float> QueryRefreshRateForWindow(const WindowInfo& wi);
+  static std::optional<float> QueryRefreshRateForWindow(const WindowInfo& wi, Error* error = nullptr);
 };

src/util/x11_tools.cpp

@@ -0,0 +1,325 @@
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: CC-BY-NC-ND-4.0
+
+#include "x11_tools.h"
+#include "window_info.h"
+
+#include "common/assert.h"
+#include "common/error.h"
+#include "common/log.h"
+#include "common/scoped_guard.h"
+
+#include <X11/Xlib-xcb.h>
+#include <xcb/randr.h>
+#include <xcb/xcb.h>
+
+#include <memory>
+
+LOG_CHANNEL(WindowInfo);
+
+namespace {
+template<typename T>
+struct XCBPointerDeleter
+{
+  void operator()(T* ptr) { free(ptr); }
+};
+
+template<typename T>
+using XCBPointer = std::unique_ptr<T, XCBPointerDeleter<T>>;
+} // namespace
+
+X11Window::X11Window() = default;
+
+X11Window::X11Window(X11Window&& move)
+{
+  m_connection = move.m_connection;
+  m_parent_window = move.m_parent_window;
+  m_window = move.m_window;
+  m_colormap = move.m_colormap;
+  m_width = move.m_width;
+  m_height = move.m_height;
+
+  move.m_connection = nullptr;
+  move.m_parent_window = {};
+  move.m_window = {};
+  move.m_colormap = {};
+  move.m_width = 0;
+  move.m_height = 0;
+}
+
+X11Window::~X11Window()
+{
+  Destroy();
+}
+
+X11Window& X11Window::operator=(X11Window&& move)
+{
+  m_connection = move.m_connection;
+  m_parent_window = move.m_parent_window;
+  m_window = move.m_window;
+  m_colormap = move.m_colormap;
+  m_width = move.m_width;
+  m_height = move.m_height;
+
+  move.m_connection = nullptr;
+  move.m_parent_window = {};
+  move.m_window = {};
+  move.m_colormap = {};
+  move.m_width = 0;
+  move.m_height = 0;
+
+  return *this;
+}
+
+static void SetErrorObject(Error* error, const char* prefix, const xcb_generic_error_t* xerror)
+{
+  Error::SetStringFmt(error, "{} failed: EC={} Major={} Minor={} Resource={:X}", xerror->error_code,
+                      xerror->response_type, xerror->major_code, xerror->minor_code, xerror->resource_id);
+}
+
+bool X11Window::Create(xcb_connection_t* connection, xcb_window_t parent_window, xcb_visualid_t vi, Error* error)
+{
+  xcb_generic_error_t* xerror;
+
+  m_connection = connection;
+  m_parent_window = parent_window;
+
+  XCBPointer<xcb_get_geometry_reply_t> gwa(
+    xcb_get_geometry_reply(connection, xcb_get_geometry(connection, parent_window), &xerror));
+  if (!gwa)
+  {
+    SetErrorObject(error, "xcb_get_geometry_reply() failed: ", xerror);
+    return false;
+  }
+
+  m_width = gwa->width;
+  m_height = gwa->height;
+
+  // Need to find the root window to get an appropriate depth. Needed for NVIDIA+XWayland.
+  int visual_depth = XCB_COPY_FROM_PARENT;
+  for (xcb_screen_iterator_t it = xcb_setup_roots_iterator(xcb_get_setup(connection)); it.rem != 0;
+       xcb_screen_next(&it))
+  {
+    if (it.data->root == gwa->root)
+    {
+      for (xcb_depth_iterator_t dit = xcb_screen_allowed_depths_iterator(it.data); dit.rem != 0; xcb_depth_next(&dit))
+      {
+        const int len = xcb_depth_visuals_length(dit.data);
+        const xcb_visualtype_t* visuals = xcb_depth_visuals(dit.data);
+        int idx = 0;
+        for (; idx < len; idx++)
+        {
+          if (vi == visuals[idx].visual_id)
+          {
+            visual_depth = dit.data->depth;
+            break;
+          }
+        }
+      }
+
+      break;
+    }
+  }
+  if (visual_depth == XCB_COPY_FROM_PARENT)
+    WARNING_LOG("Could not find visual's depth.");
+
+  // ID isn't "used" until the call succeeds.
+  m_colormap = xcb_generate_id(connection);
+  if ((xerror = xcb_request_check(
+         connection, xcb_create_colormap_checked(connection, XCB_COLORMAP_ALLOC_NONE, m_colormap, parent_window, vi))))
+  {
+    SetErrorObject(error, "xcb_create_colormap_checked() failed: ", xerror);
+    m_colormap = {};
+    return false;
+  }
+
+  m_window = xcb_generate_id(connection);
+
+  const u32 window_values[] = {XCB_PIXMAP_NONE, 0u, m_colormap};
+  xerror = xcb_request_check(
+    connection, xcb_create_window_checked(connection, visual_depth, m_window, parent_window, 0, 0, m_width, m_height, 0,
+                                          XCB_WINDOW_CLASS_INPUT_OUTPUT, vi,
+                                          XCB_CW_BACK_PIXMAP | XCB_CW_BORDER_PIXEL | XCB_CW_COLORMAP, window_values));
+  if (xerror)
+  {
+    SetErrorObject(error, "xcb_create_window_checked() failed: ", xerror);
+    m_window = {};
+    return false;
+  }
+
+  xerror = xcb_request_check(connection, xcb_map_window_checked(connection, m_window));
+  if (xerror)
+  {
+    SetErrorObject(error, "xcb_map_window_checked() failed: ", xerror);
+    return false;
+  }
+
+  return true;
+}
+
+void X11Window::Destroy()
+{
+  xcb_generic_error_t* xerror;
+  Error error;
+
+  if (m_window)
+  {
+    if ((xerror = xcb_request_check(m_connection, xcb_unmap_window_checked(m_connection, m_window))))
+    {
+      SetErrorObject(&error, "xcb_unmap_window_checked() failed: ", xerror);
+      ERROR_LOG(error.GetDescription());
+    }
+
+    if ((xerror = xcb_request_check(m_connection, xcb_destroy_window_checked(m_connection, m_window))))
+    {
+      SetErrorObject(&error, "xcb_destroy_window_checked() failed: ", xerror);
+      ERROR_LOG(error.GetDescription());
+    }
+
+    m_window = {};
+    m_parent_window = {};
+  }
+
+  if (m_colormap)
+  {
+    if ((xerror = xcb_request_check(m_connection, xcb_free_colormap_checked(m_connection, m_colormap))))
+    {
+      SetErrorObject(&error, "xcb_free_colormap_checked() failed: ", xerror);
+      ERROR_LOG(error.GetDescription());
+    }
+
+    m_colormap = {};
+  }
+}
+
+void X11Window::Resize(u16 width, u16 height)
+{
+  xcb_generic_error_t* xerror;
+  Error error;
+
+  if (width != 0 && height != 0)
+  {
+    m_width = width;
+    m_height = height;
+  }
+  else
+  {
+    XCBPointer<xcb_get_geometry_reply_t> gwa(
+      xcb_get_geometry_reply(m_connection, xcb_get_geometry(m_connection, m_parent_window), &xerror));
+    if (!gwa)
+    {
+      SetErrorObject(&error, "xcb_get_geometry() failed: ", xerror);
+      ERROR_LOG(error.GetDescription());
+      return;
+    }
+
+    m_width = gwa->width;
+    m_height = gwa->height;
+  }
+
+  u32 values[] = {width, height};
+  if ((xerror = xcb_request_check(
+         m_connection, xcb_configure_window_checked(m_connection, m_window,
+                                                    XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, values))))
+  {
+    SetErrorObject(&error, "xcb_configure_window_checked() failed: ", xerror);
+    ERROR_LOG(error.GetDescription());
+  }
+}
+
+std::optional<float> GetRefreshRateFromXRandR(const WindowInfo& wi, Error* error)
+{
+  xcb_connection_t* connection = nullptr;
+  if (wi.type == WindowInfo::Type::Xlib)
+  {
+    connection = XGetXCBConnection(static_cast<Display*>(wi.display_connection));
+  }
+  else if (wi.type == WindowInfo::Type::XCB)
+  {
+    connection = static_cast<xcb_connection_t*>(wi.display_connection);
+  }
+
+  xcb_window_t window = static_cast<xcb_window_t>(reinterpret_cast<uintptr_t>(wi.window_handle));
+  if (wi.type != WindowInfo::Type::XCB || !connection || window == XCB_NONE)
+  {
+    Error::SetStringView(error, "Invalid window handle.");
+    return std::nullopt;
+  }
+
+  xcb_generic_error_t* xerror;
+  XCBPointer<xcb_randr_get_screen_resources_reply_t> gsr(
+    xcb_randr_get_screen_resources_reply(connection, xcb_randr_get_screen_resources(connection, window), &xerror));
+  if (xerror)
+  {
+    SetErrorObject(error, "xcb_randr_get_screen_resources() failed: ", xerror);
+    return std::nullopt;
+  }
+
+  XCBPointer<xcb_randr_get_monitors_reply_t> gm(
+    xcb_randr_get_monitors_reply(connection, xcb_randr_get_monitors(connection, window, true), &xerror));
+  if (xerror || gm->nMonitors < 0)
+  {
+    SetErrorObject(error, "xcb_randr_get_screen_resources() failed: ", xerror);
+    return std::nullopt;
+  }
+
+  if (gm->nMonitors > 1)
+    WARNING_LOG("xcb_randr_get_monitors() returned {} monitors, using first", gm->nMonitors);
+
+  if (gm->nOutputs <= 0)
+  {
+    Error::SetStringView(error, "Monitor has no outputs");
+    return std::nullopt;
+  }
+  else if (gm->nOutputs > 1)
+  {
+    WARNING_LOG("Monitor has {} outputs, using first", gm->nOutputs);
+  }
+
+  xcb_randr_monitor_info_t* monitor_info = xcb_randr_get_monitors_monitors_iterator(gm.get()).data;
+  DebugAssert(monitor_info);
+
+  xcb_randr_output_t* monitor_outputs = xcb_randr_monitor_info_outputs(monitor_info);
+  DebugAssert(monitor_outputs);
+
+  XCBPointer<xcb_randr_get_output_info_reply_t> goi(
+    xcb_randr_get_output_info_reply(connection, xcb_randr_get_output_info(connection, monitor_outputs[0], 0), &xerror));
+  if (xerror)
+  {
+    SetErrorObject(error, "xcb_randr_get_output_info() failed: ", xerror);
+    return std::nullopt;
+  }
+
+  XCBPointer<xcb_randr_get_crtc_info_reply_t> gci(
+    xcb_randr_get_crtc_info_reply(connection, xcb_randr_get_crtc_info(connection, goi->crtc, 0), &xerror));
+  if (xerror)
+  {
+    SetErrorObject(error, "xcb_randr_get_crtc_info_reply() failed: ", xerror);
+    return std::nullopt;
+  }
+
+  xcb_randr_mode_info_t* mode = nullptr;
+  for (xcb_randr_mode_info_iterator_t it = xcb_randr_get_screen_resources_modes_iterator(gsr.get()); it.rem != 0;
+       xcb_randr_mode_info_next(&it))
+  {
+    if (it.data->id == gci->mode)
+    {
+      mode = it.data;
+      break;
+    }
+  }
+  if (!mode)
+  {
+    Error::SetStringFmt(error, "Failed to look up mode ID {}", static_cast<int>(gci->mode));
+    return std::nullopt;
+  }
+
+  if (mode->dot_clock == 0 || mode->htotal == 0 || mode->vtotal == 0)
+  {
+    ERROR_LOG("Modeline is invalid: {}/{}/{}", mode->dot_clock, mode->htotal, mode->vtotal);
+    return std::nullopt;
+  }
+
+  return static_cast<float>(static_cast<double>(mode->dot_clock) /
+                            (static_cast<double>(mode->htotal) * static_cast<double>(mode->vtotal)));
+}

src/util/x11_tools.h

@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: CC-BY-NC-ND-4.0
+
+#pragma once
+
+#include "common/types.h"
+
+#include <xcb/xcb.h>
+#include <xcb/xproto.h>
+
+class Error;
+struct WindowInfo;
+
+class X11Window
+{
+public:
+  X11Window();
+  X11Window(const X11Window&) = delete;
+  X11Window(X11Window&& move);
+  ~X11Window();
+
+  X11Window& operator=(const X11Window&) = delete;
+  X11Window& operator=(X11Window&& move);
+
+  ALWAYS_INLINE xcb_window_t GetWindow() const { return m_window; }
+  ALWAYS_INLINE xcb_window_t* GetWindowPtr() { return &m_window; }
+  ALWAYS_INLINE u32 GetWidth() const { return m_width; }
+  ALWAYS_INLINE u32 GetHeight() const { return m_height; }
+
+  bool Create(xcb_connection_t* connection, xcb_window_t parent_window, xcb_visualid_t vi, Error* error = nullptr);
+  void Destroy();
+
+  // Setting a width/height of 0 will use parent dimensions.
+  void Resize(u16 width = 0, u16 height = 0);
+
+private:
+  xcb_connection_t* m_connection = nullptr;
+  xcb_window_t m_parent_window = {};
+  xcb_window_t m_window = {};
+  xcb_colormap_t m_colormap = {};
+  u16 m_width = 0;
+  u16 m_height = 0;
+};
+
+std::optional<float> GetRefreshRateFromXRandR(const WindowInfo& wi, Error* error);