create shared font if it is missing

src/core/CMakeLists.txt

@@ -386,8 +386,11 @@ set(HEADERS
             telemetry_session.h
             )
 
-create_directory_groups(${SRCS} ${HEADERS})
+set(SYSTEM_ARCHIVES
-add_library(core STATIC ${SRCS} ${HEADERS})
+            ../../dist/shared_font.app.romfs.h
+            )
+create_directory_groups(${SRCS} ${HEADERS} ${SYSTEM_ARCHIVES})
+add_library(core STATIC ${SRCS} ${HEADERS} ${SYSTEM_ARCHIVES})
 target_link_libraries(core PUBLIC common PRIVATE audio_core network video_core)
 target_link_libraries(core PUBLIC Boost::boost PRIVATE cryptopp dynarmic fmt)
 if (ENABLE_WEB_SERVICE)

src/core/file_sys/archive_ncch.cpp

@@ -15,6 +15,8 @@
 #include "core/file_sys/ivfc_archive.h"
 #include "core/hle/service/fs/archive.h"
 
+#include "../../dist/shared_font.app.romfs.h"
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
@@ -82,6 +84,36 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_NCCH::Open(const Path&
 
 ResultCode ArchiveFactory_NCCH::Format(const Path& path,
                                        const FileSys::ArchiveFormatInfo& format_info) {
+    // TODO(B3N30): Take care of the format_info
+    auto vec = path.AsBinary();
+    const u32* data = reinterpret_cast<u32*>(vec.data());
+    u32 high = data[1];
+    u32 low = data[0];
+    std::string file_path = GetNCCHPath(mount_point, high, low);
+
+    // High Title ID of the archive: The category (https://3dbrew.org/wiki/Title_list).
+    constexpr u32 shared_data_archive = 0x0004009B;
+
+    // Low Title IDs.
+    constexpr u32 shared_font_archive = 0x00014002;
+
+    if (high == shared_data_archive) {
+        if (low == shared_font_archive) {
+            auto file = std::make_shared<FileUtil::IOFile>(file_path, "w+b");
+            if (!file->IsOpen()) {
+                LOG_ERROR(Service_FS, "Could not create shared font file.");
+                // TODO: Verify error code
+                return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS,
+                                  ErrorSummary::NotSupported, ErrorLevel::Permanent);
+            }
+            file->WriteBytes(SHARED_FONT_DATA, SHARED_FONT_DATA_len);
+            file->Close();
+            file.reset();
+            LOG_DEBUG(Service_FS, "Created shared font file.");
+            return RESULT_SUCCESS;
+        }
+    }
+
     LOG_ERROR(Service_FS, "Attempted to format a NCCH archive.");
     // TODO: Verify error code
     return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS, ErrorSummary::NotSupported,

src/core/hle/service/apt/apt.cpp

@@ -982,6 +982,18 @@ static bool LoadLegacySharedFont() {
     return false;
 }
 
+static bool FormatSharedFont() {
+    // TODO (B3N30): create different font archive for region CHN/KOR/TWN
+    const u64_le shared_font_archive_id_low = 0x0004009b00014002;
+    const u64_le shared_font_archive_id_high = 0x00000001ffffff00;
+    std::vector<u8> shared_font_archive_id(16);
+    std::memcpy(&shared_font_archive_id[0], &shared_font_archive_id_low, sizeof(u64));
+    std::memcpy(&shared_font_archive_id[8], &shared_font_archive_id_high, sizeof(u64));
+    FileSys::Path archive_path(shared_font_archive_id);
+    return Service::FS::FormatArchive(Service::FS::ArchiveIdCode::NCCH,
+                                      FileSys::ArchiveFormatInfo{}, archive_path) == RESULT_SUCCESS;
+}
+
 void Init() {
     AddService(new APT_A_Interface);
     AddService(new APT_S_Interface);
@@ -1000,6 +1012,8 @@ void Init() {
     } else if (LoadLegacySharedFont()) {
         LOG_WARNING(Service_APT, "Loaded shared font by legacy method");
         shared_font_loaded = true;
+    } else if (FormatSharedFont() && LoadSharedFont()) {
+        shared_font_loaded = true;
     } else {
         LOG_WARNING(Service_APT, "Unable to load shared font");
         shared_font_loaded = false;