qt: Delay physical device enumeration to settings open. (#2908)

src/qt_gui/main_window.cpp

@@ -24,7 +24,6 @@
 #include "main_window.h"
 #include "settings_dialog.h"
 
-#include "video_core/renderer_vulkan/vk_instance.h"
 #ifdef ENABLE_DISCORD_RPC
 #include "common/discord_rpc_handler.h"
 #endif
@@ -53,7 +52,6 @@ bool MainWindow::Init() {
     CreateConnects();
     SetLastUsedTheme();
     SetLastIconSizeBullet();
-    GetPhysicalDevices();
     // show ui
     setMinimumSize(720, 405);
     std::string window_title = "";
@@ -368,19 +366,6 @@ void MainWindow::CheckUpdateMain(bool checkSave) {
 }
 #endif
 
-void MainWindow::GetPhysicalDevices() {
-    Vulkan::Instance instance(false, false);
-    auto physical_devices = instance.GetPhysicalDevices();
-    for (const vk::PhysicalDevice physical_device : physical_devices) {
-        auto prop = physical_device.getProperties();
-        QString name = QString::fromUtf8(prop.deviceName, -1);
-        if (prop.apiVersion < Vulkan::TargetVulkanApiVersion) {
-            name += tr(" * Unsupported Vulkan Version");
-        }
-        m_physical_devices.push_back(name);
-    }
-}
-
 void MainWindow::CreateConnects() {
     connect(this, &MainWindow::WindowResized, this, &MainWindow::HandleResize);
     connect(ui->mw_searchbar, &QLineEdit::textChanged, this, &MainWindow::SearchGameTable);
@@ -421,7 +406,7 @@ void MainWindow::CreateConnects() {
             &MainWindow::StartGame);
 
     connect(ui->configureAct, &QAction::triggered, this, [this]() {
-        auto settingsDialog = new SettingsDialog(m_physical_devices, m_compat_info, this);
+        auto settingsDialog = new SettingsDialog(m_compat_info, this);
 
         connect(settingsDialog, &SettingsDialog::LanguageChanged, this,
                 &MainWindow::OnLanguageChanged);
@@ -454,7 +439,7 @@ void MainWindow::CreateConnects() {
     });
 
     connect(ui->settingsButton, &QPushButton::clicked, this, [this]() {
-        auto settingsDialog = new SettingsDialog(m_physical_devices, m_compat_info, this);
+        auto settingsDialog = new SettingsDialog(m_compat_info, this);
 
         connect(settingsDialog, &SettingsDialog::LanguageChanged, this,
                 &MainWindow::OnLanguageChanged);

src/qt_gui/main_window.h

@@ -60,7 +60,6 @@ private:
     void toggleFullscreen();
     void CreateRecentGameActions();
     void CreateDockWindows();
-    void GetPhysicalDevices();
     void LoadGameLists();
 
 #ifdef ENABLE_UPDATER
@@ -96,8 +95,6 @@ private:
     QScopedPointer<ElfViewer> m_elf_viewer;
     // Status Bar.
     QScopedPointer<QStatusBar> statusBar;
-    // Available GPU devices
-    std::vector<QString> m_physical_devices;
 
     PSF psf;
 

src/qt_gui/settings_dialog.cpp

@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <vector>
 #include <QCompleter>
 #include <QDirIterator>
 #include <QFileDialog>
@@ -25,6 +26,7 @@
 #include "common/logging/filter.h"
 #include "settings_dialog.h"
 #include "ui_settings_dialog.h"
+#include "video_core/renderer_vulkan/vk_instance.h"
 QStringList languageNames = {"Arabic",
                              "Czech",
                              "Danish",
@@ -67,8 +69,9 @@ QMap<QString, QString> chooseHomeTabMap;
 int backgroundImageOpacitySlider_backup;
 int bgm_volume_backup;
 
-SettingsDialog::SettingsDialog(std::span<const QString> physical_devices,
-                               std::shared_ptr<CompatibilityInfoClass> m_compat_info,
+static std::vector<QString> m_physical_devices;
+
+SettingsDialog::SettingsDialog(std::shared_ptr<CompatibilityInfoClass> m_compat_info,
                                QWidget* parent)
     : QDialog(parent), ui(new Ui::SettingsDialog) {
     ui->setupUi(this);
@@ -89,9 +92,23 @@ SettingsDialog::SettingsDialog(std::span<const QString> physical_devices,
                         {tr("Input"), "Input"},       {tr("Paths"), "Paths"},
                         {tr("Debug"), "Debug"}};
 
+    if (m_physical_devices.empty()) {
+        // Populate cache of physical devices.
+        Vulkan::Instance instance(false, false);
+        auto physical_devices = instance.GetPhysicalDevices();
+        for (const vk::PhysicalDevice physical_device : physical_devices) {
+            auto prop = physical_device.getProperties();
+            QString name = QString::fromUtf8(prop.deviceName, -1);
+            if (prop.apiVersion < Vulkan::TargetVulkanApiVersion) {
+                name += tr(" * Unsupported Vulkan Version");
+            }
+            m_physical_devices.push_back(name);
+        }
+    }
+
     // Add list of available GPUs
     ui->graphicsAdapterBox->addItem(tr("Auto Select")); // -1, auto selection
-    for (const auto& device : physical_devices) {
+    for (const auto& device : m_physical_devices) {
         ui->graphicsAdapterBox->addItem(device);
     }
 

src/qt_gui/settings_dialog.h

@@ -20,8 +20,7 @@ class SettingsDialog;
 class SettingsDialog : public QDialog {
     Q_OBJECT
 public:
-    explicit SettingsDialog(std::span<const QString> physical_devices,
-                            std::shared_ptr<CompatibilityInfoClass> m_compat_info,
+    explicit SettingsDialog(std::shared_ptr<CompatibilityInfoClass> m_compat_info,
                             QWidget* parent = nullptr);
     ~SettingsDialog();