lime_qt: Add support for game desktop shortcuts

src/common/common_paths.h

@@ -52,6 +52,7 @@
 #define LOAD_DIR "load"
 #define SHADER_DIR "shaders"
 #define STATES_DIR "states"
+#define ICONS_DIR "icons"
 
 // Filenames
 // Files in the directory returned by GetUserPath(UserPath::LogDir)

src/common/file_util.cpp

@@ -826,6 +826,7 @@ void SetUserPath(const std::string& path) {
     g_paths.emplace(UserPath::DumpDir, user_path + DUMP_DIR DIR_SEP);
     g_paths.emplace(UserPath::LoadDir, user_path + LOAD_DIR DIR_SEP);
     g_paths.emplace(UserPath::StatesDir, user_path + STATES_DIR DIR_SEP);
+    g_paths.emplace(UserPath::IconsDir, user_path + ICONS_DIR DIR_SEP);
     g_default_paths = g_paths;
 }
 

src/common/file_util.h

@@ -40,6 +40,7 @@ enum class UserPath {
     StatesDir,
     SysDataDir,
     UserDir,
+    IconsDir,
 };
 
 // Replaces install-specific paths with standard placeholders, and back again

src/lime_qt/configuration/configure_per_game.cpp

@@ -131,18 +131,6 @@ void ConfigurePerGame::HandleApplyButtonClicked() {
     }
 }
 
-static QPixmap GetQPixmapFromSMDH(std::vector<u8>& smdh_data) {
-    Loader::SMDH smdh;
-    std::memcpy(&smdh, smdh_data.data(), sizeof(Loader::SMDH));
-
-    bool large = true;
-    std::vector<u16> icon_data = smdh.GetIcon(large);
-    const uchar* data = reinterpret_cast<const uchar*>(icon_data.data());
-    int size = large ? 48 : 24;
-    QImage icon(data, size, size, QImage::Format::Format_RGB16);
-    return QPixmap::fromImage(icon);
-}
-
 void ConfigurePerGame::LoadConfiguration() {
     if (filename.empty()) {
         return;

src/lime_qt/game_list.cpp

@@ -592,6 +592,14 @@ void GameList::AddGamePopup(QMenu& context_menu, const QString& path, const QStr
     QAction* uninstall_dlc = uninstall_menu->addAction(tr("DLC"));
 
     QAction* navigate_to_gamedb_entry = context_menu.addAction(tr("Navigate to GameDB entry"));
+
+#if !defined(__APPLE__)
+    QMenu* shortcut_menu = context_menu.addMenu(tr("Create Shortcut"));
+    QAction* create_desktop_shortcut = shortcut_menu->addAction(tr("Add to Desktop"));
+    QAction* create_applications_menu_shortcut =
+        shortcut_menu->addAction(tr("Add to Applications Menu"));
+#endif
+
     context_menu.addSeparator();
     QAction* properties = context_menu.addAction(tr("Properties"));
 
@@ -775,6 +783,15 @@ void GameList::AddGamePopup(QMenu& context_menu, const QString& path, const QStr
             main_window->UninstallTitles(titles);
         }
     });
+    // TODO: Implement shortcut creation for macOS
+#if !defined(__APPLE__)
+    connect(create_desktop_shortcut, &QAction::triggered, [this, program_id, path]() {
+        emit CreateShortcut(program_id, path.toStdString(), GameListShortcutTarget::Desktop);
+    });
+    connect(create_applications_menu_shortcut, &QAction::triggered, [this, program_id, path]() {
+        emit CreateShortcut(program_id, path.toStdString(), GameListShortcutTarget::Applications);
+    });
+#endif
 }
 
 void GameList::AddCustomDirPopup(QMenu& context_menu, QModelIndex selected) {

src/lime_qt/game_list.h

@@ -45,6 +45,11 @@ enum class GameListOpenTarget {
     SHADER_CACHE = 8
 };
 
+enum class GameListShortcutTarget {
+    Desktop,
+    Applications,
+};
+
 class GameList : public QWidget {
     Q_OBJECT
 
@@ -90,6 +95,8 @@ signals:
     void GameChosen(const QString& game_path);
     void ShouldCancelWorker();
     void OpenFolderRequested(u64 program_id, GameListOpenTarget target);
+    void CreateShortcut(u64 program_id, const std::string& game_path,
+                        GameListShortcutTarget target);
     void NavigateToGamedbEntryRequested(u64 program_id,
                                         const CompatibilityList& compatibility_list);
     void OpenPerGameGeneralRequested(const QString file);

src/lime_qt/loading_screen.cpp

@@ -14,10 +14,12 @@
 #include <QStyleOption>
 #include <QTime>
 #include <fmt/format.h>
+#include "citra_qt/util/util.h"
 #include "common/logging/log.h"
 #include "core/loader/loader.h"
 #include "core/loader/smdh.h"
 #include "lime_qt/loading_screen.h"
+#include "lime_qt/util/util.h"
 #include "ui_loading_screen.h"
 #include "video_core/rasterizer_interface.h"
 
@@ -79,18 +81,6 @@ const static std::unordered_map<VideoCore::LoadCallbackStage, const char*> progr
     {VideoCore::LoadCallbackStage::Complete, PROGRESSBAR_STYLE_COMPLETE},
 };
 
-static QPixmap GetQPixmapFromSMDH(std::vector<u8>& smdh_data) {
-    Loader::SMDH smdh;
-    std::memcpy(&smdh, smdh_data.data(), sizeof(Loader::SMDH));
-
-    bool large = true;
-    std::vector<u16> icon_data = smdh.GetIcon(large);
-    const uchar* data = reinterpret_cast<const uchar*>(icon_data.data());
-    int size = large ? 48 : 24;
-    QImage icon(data, size, size, QImage::Format::Format_RGB16);
-    return QPixmap::fromImage(icon);
-}
-
 LoadingScreen::LoadingScreen(QWidget* parent)
     : QWidget(parent), ui(std::make_unique<Ui::LoadingScreen>()),
       previous_stage(VideoCore::LoadCallbackStage::Complete) {

src/lime_qt/main.cpp

@@ -19,6 +19,7 @@
 #include <unistd.h> // for chdir
 #endif
 #ifdef _WIN32
+#include <shlobj.h>
 #include <windows.h>
 #endif
 #ifdef __unix__
@@ -75,6 +76,7 @@
 #include "lime_qt/updater/updater.h"
 #include "lime_qt/util/clickable_label.h"
 #include "lime_qt/util/graphics_device_info.h"
+#include "lime_qt/util/util.h"
 #if CITRA_ARCH(x86_64)
 #include "common/x64/cpu_detect.h"
 #endif
@@ -825,6 +827,7 @@ void GMainWindow::ConnectWidgetEvents() {
     connect(game_list, &GameList::OpenFolderRequested, this, &GMainWindow::OnGameListOpenFolder);
     connect(game_list, &GameList::NavigateToGamedbEntryRequested, this,
             &GMainWindow::OnGameListNavigateToGamedbEntry);
+    connect(game_list, &GameList::CreateShortcut, this, &GMainWindow::OnGameListCreateShortcut);
     connect(game_list, &GameList::DumpRomFSRequested, this, &GMainWindow::OnGameListDumpRomFS);
     connect(game_list, &GameList::AddDirectory, this, &GMainWindow::OnGameListAddDirectory);
     connect(game_list_placeholder, &GameListPlaceholder::AddDirectory, this,
@@ -1640,6 +1643,255 @@ void GMainWindow::OnGameListNavigateToGamedbEntry(u64 program_id,
     QDesktopServices::openUrl(QUrl(QStringLiteral("https://citra-emu.org/game/") + directory));
 }
 
+bool GMainWindow::CreateShortcutLink(const std::filesystem::path& shortcut_path,
+                                     const std::string& comment,
+                                     const std::filesystem::path& icon_path,
+                                     const std::filesystem::path& command,
+                                     const std::string& arguments, const std::string& categories,
+                                     const std::string& keywords, const std::string& name) try {
+#if defined(__linux__) || defined(__FreeBSD__) // Linux and FreeBSD
+    std::filesystem::path shortcut_path_full = shortcut_path / (name + ".desktop");
+    std::ofstream shortcut_stream(shortcut_path_full, std::ios::binary | std::ios::trunc);
+    if (!shortcut_stream.is_open()) {
+        LOG_ERROR(Frontend, "Failed to create shortcut");
+        return false;
+    }
+    // TODO: Migrate fmt::print to std::print in futures STD C++ 23.
+    fmt::print(shortcut_stream, "[Desktop Entry]\n");
+    fmt::print(shortcut_stream, "Type=Application\n");
+    fmt::print(shortcut_stream, "Version=1.0\n");
+    fmt::print(shortcut_stream, "Name={}\n", name);
+    if (!comment.empty()) {
+        fmt::print(shortcut_stream, "Comment={}\n", comment);
+    }
+    if (std::filesystem::is_regular_file(icon_path)) {
+        fmt::print(shortcut_stream, "Icon={}\n", icon_path.string());
+    }
+    fmt::print(shortcut_stream, "TryExec={}\n", command.string());
+    fmt::print(shortcut_stream, "Exec={} {}\n", command.string(), arguments);
+    if (!categories.empty()) {
+        fmt::print(shortcut_stream, "Categories={}\n", categories);
+    }
+    if (!keywords.empty()) {
+        fmt::print(shortcut_stream, "Keywords={}\n", keywords);
+    }
+    return true;
+#elif defined(_WIN32) // Windows
+    HRESULT hr = CoInitialize(nullptr);
+    if (FAILED(hr)) {
+        LOG_ERROR(Frontend, "CoInitialize failed");
+        return false;
+    }
+    SCOPE_EXIT({ CoUninitialize(); });
+    IShellLinkW* ps1 = nullptr;
+    IPersistFile* persist_file = nullptr;
+    SCOPE_EXIT({
+        if (persist_file != nullptr) {
+            persist_file->Release();
+        }
+        if (ps1 != nullptr) {
+            ps1->Release();
+        }
+    });
+    HRESULT hres = CoCreateInstance(CLSID_ShellLink, nullptr, CLSCTX_INPROC_SERVER, IID_IShellLinkW,
+                                    reinterpret_cast<void**>(&ps1));
+    if (FAILED(hres)) {
+        LOG_ERROR(Frontend, "Failed to create IShellLinkW instance");
+        return false;
+    }
+    hres = ps1->SetPath(command.c_str());
+    if (FAILED(hres)) {
+        LOG_ERROR(Frontend, "Failed to set path");
+        return false;
+    }
+    if (!arguments.empty()) {
+        hres = ps1->SetArguments(Common::UTF8ToUTF16W(arguments).data());
+        if (FAILED(hres)) {
+            LOG_ERROR(Frontend, "Failed to set arguments");
+            return false;
+        }
+    }
+    if (!comment.empty()) {
+        hres = ps1->SetDescription(Common::UTF8ToUTF16W(comment).data());
+        if (FAILED(hres)) {
+            LOG_ERROR(Frontend, "Failed to set description");
+            return false;
+        }
+    }
+    if (std::filesystem::is_regular_file(icon_path)) {
+        hres = ps1->SetIconLocation(icon_path.c_str(), 0);
+        if (FAILED(hres)) {
+            LOG_ERROR(Frontend, "Failed to set icon location");
+            return false;
+        }
+    }
+    hres = ps1->QueryInterface(IID_IPersistFile, reinterpret_cast<void**>(&persist_file));
+    if (FAILED(hres)) {
+        LOG_ERROR(Frontend, "Failed to get IPersistFile interface");
+        return false;
+    }
+    hres = persist_file->Save(std::filesystem::path{shortcut_path / (name + ".lnk")}.c_str(), TRUE);
+    if (FAILED(hres)) {
+        LOG_ERROR(Frontend, "Failed to save shortcut");
+        return false;
+    }
+    return true;
+#else                 // Unsupported platform
+    return false;
+#endif
+} catch (const std::exception& e) {
+    LOG_ERROR(Frontend, "Failed to create shortcut: {}", e.what());
+    return false;
+}
+
+// Messages in pre-defined message boxes for less code spaghetti
+bool GMainWindow::CreateShortcutMessagesGUI(QWidget* parent, int message,
+                                            const QString& game_title) {
+    int result = 0;
+    QMessageBox::StandardButtons buttons;
+    switch (message) {
+    case GMainWindow::CREATE_SHORTCUT_MSGBOX_FULLSCREEN_YES:
+        buttons = QMessageBox::Yes | QMessageBox::No;
+        result =
+            QMessageBox::information(parent, tr("Create Shortcut"),
+                                     tr("Do you want to launch the game in fullscreen?"), buttons);
+        return result == QMessageBox::Yes;
+    case GMainWindow::CREATE_SHORTCUT_MSGBOX_SUCCESS:
+        QMessageBox::information(parent, tr("Create Shortcut"),
+                                 tr("Successfully created a shortcut to %1").arg(game_title));
+        return false;
+    case GMainWindow::CREATE_SHORTCUT_MSGBOX_APPVOLATILE_WARNING:
+        buttons = QMessageBox::StandardButton::Ok | QMessageBox::StandardButton::Cancel;
+        result =
+            QMessageBox::warning(this, tr("Create Shortcut"),
+                                 tr("This will create a shortcut to the current AppImage. This may "
+                                    "not work well if you update. Continue?"),
+                                 buttons);
+        return result == QMessageBox::Ok;
+    default:
+        buttons = QMessageBox::Ok;
+        QMessageBox::critical(parent, tr("Create Shortcut"),
+                              tr("Failed to create a shortcut to %1").arg(game_title), buttons);
+        return false;
+    }
+}
+
+bool GMainWindow::MakeShortcutIcoPath(const u64 program_id, const std::string_view game_file_name,
+                                      std::filesystem::path& out_icon_path) {
+    // Get path to Citra icons directory & icon extension
+    std::string ico_extension = "png";
+#if defined(_WIN32)
+    out_icon_path = FileUtil::GetUserPath(FileUtil::UserPath::IconsDir);
+    ico_extension = "ico";
+#elif defined(__linux__) || defined(__FreeBSD__)
+    out_icon_path = FileUtil::GetDataDirectory("XDG_DATA_HOME") / "icons/hicolor/256x256";
+#endif
+    // Create icons directory if it doesn't exist
+    if (!FileUtil::CreateDir(out_icon_path.string())) {
+        QMessageBox::critical(
+            this, tr("Create Icon"),
+            tr("Cannot create icon file. Path \"%1\" does not exist and cannot be created.")
+                .arg(QString::fromStdString(out_icon_path.string())),
+            QMessageBox::StandardButton::Ok);
+        out_icon_path.clear();
+        return false;
+    }
+
+    // Create icon file path
+    out_icon_path /= (program_id == 0 ? fmt::format("citra-{}.{}", game_file_name, ico_extension)
+                                      : fmt::format("citra-{:016X}.{}", program_id, ico_extension));
+    return true;
+}
+
+void GMainWindow::OnGameListCreateShortcut(u64 program_id, const std::string& game_path,
+                                           GameListShortcutTarget target) {
+    // Get path to citra executable
+    const QStringList args = QApplication::arguments();
+    std::filesystem::path citra_command = args[0].toStdString();
+    // If relative path, make it an absolute path
+    if (citra_command.c_str()[0] == '.') {
+        citra_command = FileUtil::GetCurrentDir().value_or("") + DIR_SEP + citra_command.string();
+    }
+
+    // Shortcut path
+    std::filesystem::path shortcut_path{};
+    if (target == GameListShortcutTarget::Desktop) {
+        shortcut_path =
+            QStandardPaths::writableLocation(QStandardPaths::DesktopLocation).toStdString();
+    } else if (target == GameListShortcutTarget::Applications) {
+        shortcut_path =
+            QStandardPaths::writableLocation(QStandardPaths::ApplicationsLocation).toStdString();
+    }
+
+    // Icon path and title
+    if (!std::filesystem::exists(shortcut_path)) {
+        CreateShortcutMessagesGUI(this, CREATE_SHORTCUT_MSGBOX_ERROR, {});
+        LOG_ERROR(Frontend, "Invalid shortcut target");
+        return;
+    }
+
+    // Get title from game file
+    const auto loader = Loader::GetLoader(game_path);
+    std::string game_title = fmt::format("{:016X}", program_id);
+    if (loader->ReadTitle(game_title) != Loader::ResultStatus::Success) {
+        game_title = fmt::format("{:016x}", program_id);
+    }
+
+    // Delete illegal characters from title
+    const std::string illegal_chars = "<>:\"/\\|?*.";
+    for (auto it = game_title.rbegin(); it != game_title.rend(); ++it) {
+        if (illegal_chars.find(*it) != std::string::npos) {
+            game_title.erase(it.base() - 1);
+        }
+    }
+
+    // Get icon from game file
+    std::vector<u8> icon_image_file;
+    if (loader->ReadIcon(icon_image_file) != Loader::ResultStatus::Success) {
+        LOG_WARNING(Frontend, "Could not read icon from {:s}", game_path);
+    }
+
+    const QPixmap pixmap = GetQPixmapFromSMDH(icon_image_file);
+    const QImage icon_data = pixmap.toImage();
+    std::filesystem::path out_icon_path;
+    if (MakeShortcutIcoPath(program_id, game_title, out_icon_path)) {
+        if (!SaveIconToFile(out_icon_path, icon_data)) {
+            LOG_ERROR(Frontend, "Could not write icon to file");
+        }
+    }
+
+    const auto qt_game_title = QString::fromStdString(game_title);
+#if defined(__linux__)
+    // Special case for AppImages
+    // Warn once if we are making a shortcut to a volatile AppImage
+    const std::string appimage_ending =
+        std::string(Common::g_scm_rev).substr(0, 9).append(".AppImage");
+    if (citra_command.string().ends_with(appimage_ending) &&
+        !UISettings::values.shortcut_already_warned) {
+        if (CreateShortcutMessagesGUI(this, CREATE_SHORTCUT_MSGBOX_APPVOLATILE_WARNING,
+                                      qt_game_title)) {
+            return;
+        }
+        UISettings::values.shortcut_already_warned = true;
+    }
+#endif // __linux__
+    // Create shortcut
+    std::string arguments = fmt::format("-g \"{:s}\"", game_path);
+    if (CreateShortcutMessagesGUI(this, CREATE_SHORTCUT_MSGBOX_FULLSCREEN_YES, qt_game_title)) {
+        arguments = "-f " + arguments;
+    }
+    const std::string comment = fmt::format("Start {:s} with the Citra Emulator", game_title);
+    const std::string categories = "Game;Emulator;Qt;";
+    const std::string keywords = "3ds;Nintendo;";
+
+    if (CreateShortcutLink(shortcut_path, comment, out_icon_path, citra_command, arguments,
+                           categories, keywords, game_title)) {
+        CreateShortcutMessagesGUI(this, CREATE_SHORTCUT_MSGBOX_SUCCESS, qt_game_title);
+        return;
+    }
+    CreateShortcutMessagesGUI(this, CREATE_SHORTCUT_MSGBOX_ERROR, qt_game_title);
+}
+
 void GMainWindow::OnGameListDumpRomFS(QString game_path, u64 program_id) {
     auto* dialog = new QProgressDialog(tr("Dumping..."), tr("Cancel"), 0, 0, this);
     dialog->setWindowModality(Qt::WindowModal);

src/lime_qt/main.h

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <array>
+#include <filesystem>
 #include <memory>
 #include <vector>
 #include <QMainWindow>
@@ -28,6 +29,7 @@ class EmuThread;
 class GameList;
 enum class GameListOpenTarget;
 class GameListPlaceholder;
+enum class GameListShortcutTarget;
 class GImageInfo;
 class GPUCommandListWidget;
 class GPUCommandStreamWidget;
@@ -194,6 +196,22 @@ private:
     bool ConfirmChangeGame();
     void closeEvent(QCloseEvent* event) override;
 
+    enum {
+        CREATE_SHORTCUT_MSGBOX_FULLSCREEN_YES,
+        CREATE_SHORTCUT_MSGBOX_SUCCESS,
+        CREATE_SHORTCUT_MSGBOX_ERROR,
+        CREATE_SHORTCUT_MSGBOX_APPVOLATILE_WARNING,
+    };
+
+    bool CreateShortcutMessagesGUI(QWidget* parent, int message, const QString& game_title);
+    bool MakeShortcutIcoPath(const u64 program_id, const std::string_view game_file_name,
+                             std::filesystem::path& out_icon_path);
+    bool CreateShortcutLink(const std::filesystem::path& shortcut_path, const std::string& comment,
+                            const std::filesystem::path& icon_path,
+                            const std::filesystem::path& command, const std::string& arguments,
+                            const std::string& categories, const std::string& keywords,
+                            const std::string& name);
+
 private slots:
     void OnStartGame();
     void OnRestartGame();
@@ -208,6 +226,8 @@ private slots:
     void OnGameListOpenFolder(u64 program_id, GameListOpenTarget target);
     void OnGameListNavigateToGamedbEntry(u64 program_id,
                                          const CompatibilityList& compatibility_list);
+    void OnGameListCreateShortcut(u64 program_id, const std::string& game_path,
+                                  GameListShortcutTarget target);
     void OnGameListDumpRomFS(QString game_path, u64 program_id);
     void OnGameListOpenDirectory(const QString& directory);
     void OnGameListAddDirectory();

src/lime_qt/util/util.cpp

@@ -5,8 +5,14 @@
 #include <array>
 #include <cmath>
 #include <QPainter>
+#include "core/loader/smdh.h"
 #include "lime_qt/util/util.h"
 
+#ifdef _WIN32
+#include <windows.h>
+#include "common/file_util.h"
+#endif
+
 QFont GetMonospaceFont() {
     QFont font(QStringLiteral("monospace"));
     // Automatic fallback to a monospace font on on platforms without a font called "monospace"
@@ -36,3 +42,120 @@ QPixmap CreateCirclePixmapFromColor(const QColor& color) {
     painter.drawEllipse({circle_pixmap.width() / 2.0, circle_pixmap.height() / 2.0}, 7.0, 7.0);
     return circle_pixmap;
 }
+
+QPixmap GetQPixmapFromSMDH(std::vector<u8>& smdh_data) {
+    Loader::SMDH smdh;
+    std::memcpy(&smdh, smdh_data.data(), sizeof(Loader::SMDH));
+
+    bool large = true;
+    std::vector<u16> icon_data = smdh.GetIcon(large);
+    const uchar* data = reinterpret_cast<const uchar*>(icon_data.data());
+    int size = large ? 48 : 24;
+    QImage icon(data, size, size, QImage::Format::Format_RGB16);
+    return QPixmap::fromImage(icon);
+}
+
+bool SaveIconToFile(const std::filesystem::path& icon_path, const QImage& image) {
+#if defined(WIN32)
+#pragma pack(push, 2)
+    struct IconDir {
+        WORD id_reserved;
+        WORD id_type;
+        WORD id_count;
+    };
+
+    struct IconDirEntry {
+        BYTE width;
+        BYTE height;
+        BYTE color_count;
+        BYTE reserved;
+        WORD planes;
+        WORD bit_count;
+        DWORD bytes_in_res;
+        DWORD image_offset;
+    };
+#pragma pack(pop)
+
+    const QImage source_image = image.convertToFormat(QImage::Format_RGB32);
+    constexpr std::array<int, 7> scale_sizes{256, 128, 64, 48, 32, 24, 16};
+    constexpr int bytes_per_pixel = 4;
+
+    const IconDir icon_dir{
+        .id_reserved = 0,
+        .id_type = 1,
+        .id_count = static_cast<WORD>(scale_sizes.size()),
+    };
+
+    FileUtil::IOFile icon_file(icon_path.string(), "wb");
+    if (!icon_file.IsOpen()) {
+        return false;
+    }
+
+    if (!icon_file.WriteBytes(&icon_dir, sizeof(IconDir))) {
+        return false;
+    }
+
+    std::size_t image_offset = sizeof(IconDir) + (sizeof(IconDirEntry) * scale_sizes.size());
+    for (std::size_t i = 0; i < scale_sizes.size(); i++) {
+        const int image_size = scale_sizes[i] * scale_sizes[i] * bytes_per_pixel;
+        const IconDirEntry icon_entry{
+            .width = static_cast<BYTE>(scale_sizes[i]),
+            .height = static_cast<BYTE>(scale_sizes[i]),
+            .color_count = 0,
+            .reserved = 0,
+            .planes = 1,
+            .bit_count = bytes_per_pixel * 8,
+            .bytes_in_res = static_cast<DWORD>(sizeof(BITMAPINFOHEADER) + image_size),
+            .image_offset = static_cast<DWORD>(image_offset),
+        };
+        image_offset += icon_entry.bytes_in_res;
+        if (!icon_file.WriteBytes(&icon_entry, sizeof(icon_entry))) {
+            return false;
+        }
+    }
+
+    for (std::size_t i = 0; i < scale_sizes.size(); i++) {
+        const QImage scaled_image = source_image.scaled(
+            scale_sizes[i], scale_sizes[i], Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+        const BITMAPINFOHEADER info_header{
+            .biSize = sizeof(BITMAPINFOHEADER),
+            .biWidth = scaled_image.width(),
+            .biHeight = scaled_image.height() * 2,
+            .biPlanes = 1,
+            .biBitCount = bytes_per_pixel * 8,
+            .biCompression = BI_RGB,
+            .biSizeImage{},
+            .biXPelsPerMeter{},
+            .biYPelsPerMeter{},
+            .biClrUsed{},
+            .biClrImportant{},
+        };
+
+        if (!icon_file.WriteBytes(&info_header, sizeof(info_header))) {
+            return false;
+        }
+
+        for (int y = 0; y < scaled_image.height(); y++) {
+            const auto* line = scaled_image.scanLine(scaled_image.height() - 1 - y);
+            std::vector<u8> line_data(scaled_image.width() * bytes_per_pixel);
+            std::memcpy(line_data.data(), line, line_data.size());
+            if (!icon_file.WriteBytes(line_data.data(), line_data.size())) {
+                return false;
+            }
+        }
+    }
+    icon_file.Close();
+
+    return true;
+#elif defined(__linux__) || defined(__FreeBSD__)
+    // Convert and write the icon as a PNG
+    if (!image.save(QString::fromStdString(icon_path.string()))) {
+        LOG_ERROR(Frontend, "Could not write icon as PNG to file");
+    } else {
+        LOG_INFO(Frontend, "Wrote an icon to {}", icon_path.string());
+    }
+    return true;
+#else
+    return false;
+#endif
+}

src/lime_qt/util/util.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <filesystem>
 #include <QFont>
 #include <QString>
 
@@ -19,3 +20,18 @@ QString ReadableByteSize(qulonglong size);
  * @return QPixmap circle pixmap
  */
 QPixmap CreateCirclePixmapFromColor(const QColor& color);
+
+/**
+ * Gets the game icon from SMDH data.
+ * @param smdh_data SMDH data
+ * @return QPixmap game icon
+ */
+QPixmap GetQPixmapFromSMDH(std::vector<u8>& smdh_data);
+
+/**
+ * Saves a windows icon to a file
+ * @param path The icons path
+ * @param image The image to save
+ * @return bool If the operation succeeded
+ */
+[[nodiscard]] bool SaveIconToFile(const std::filesystem::path& icon_path, const QImage& image);