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apt: load shared font from system archive

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This commit is contained in:
wwylele 2017-06-15 19:09:05 +03:00
parent 22994607cc
commit 9549eed0be
4 changed files with 262 additions and 22 deletions
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2
src/core/CMakeLists.txt
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@ -60,6 +60,7 @@ set(SRCS
hle/kernel/timer.cpp
hle/kernel/vm_manager.cpp
hle/kernel/wait_object.cpp
hle/romfs.cpp
hle/service/ac/ac.cpp
hle/service/ac/ac_i.cpp
hle/service/ac/ac_u.cpp
@ -257,6 +258,7 @@ set(HEADERS
hle/kernel/vm_manager.h
hle/kernel/wait_object.h
hle/result.h
hle/romfs.h
hle/service/ac/ac.h
hle/service/ac/ac_i.h
hle/service/ac/ac_u.h

102
src/core/hle/romfs.cpp Normal file
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@ -0,0 +1,102 @@
// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include "common/swap.h"
#include "core/hle/romfs.h"
namespace RomFS {
struct Header {
u32_le header_length;
u32_le dir_hash_table_offset;
u32_le dir_hash_table_length;
u32_le dir_table_offset;
u32_le dir_table_length;
u32_le file_hash_table_offset;
u32_le file_hash_table_length;
u32_le file_table_offset;
u32_le file_table_length;
u32_le data_offset;
};
static_assert(sizeof(Header) == 0x28, "Header has incorrect size");
struct DirectoryMetadata {
u32_le parent_dir_offset;
u32_le next_dir_offset;
u32_le first_child_dir_offset;
u32_le first_file_offset;
u32_le same_hash_next_dir_offset;
u32_le name_length; // in bytes
// followed by directory name
};
static_assert(sizeof(DirectoryMetadata) == 0x18, "DirectoryMetadata has incorrect size");
struct FileMetadata {
u32_le parent_dir_offset;
u32_le next_file_offset;
u64_le data_offset;
u64_le data_length;
u32_le same_hash_next_file_offset;
u32_le name_length; // in bytes
// followed by file name
};
static_assert(sizeof(FileMetadata) == 0x20, "FileMetadata has incorrect size");
static bool MatchName(const u8* buffer, u32 name_length, const std::u16string& name) {
std::vector<char16_t> name_buffer(name_length / sizeof(char16_t));
std::memcpy(name_buffer.data(), buffer, name_length);
return name == std::u16string(name_buffer.begin(), name_buffer.end());
}
const u8* GetFilePointer(const u8* romfs, const std::vector<std::u16string>& path) {
constexpr u32 INVALID_FIELD = 0xFFFFFFFF;
// Split path into directory names and file name
std::vector<std::u16string> dir_names = path;
dir_names.pop_back();
const std::u16string& file_name = path.back();
Header header;
std::memcpy(&header, romfs, sizeof(header));
// Find directories of each level
DirectoryMetadata dir;
const u8* current_dir = romfs + header.dir_table_offset;
std::memcpy(&dir, current_dir, sizeof(dir));
for (const std::u16string& dir_name : dir_names) {
u32 child_dir_offset;
child_dir_offset = dir.first_child_dir_offset;
while (true) {
if (child_dir_offset == INVALID_FIELD) {
return nullptr;
}
const u8* current_child_dir = romfs + header.dir_table_offset + child_dir_offset;
std::memcpy(&dir, current_child_dir, sizeof(dir));
if (MatchName(current_child_dir + sizeof(dir), dir.name_length, dir_name)) {
current_dir = current_child_dir;
break;
}
child_dir_offset = dir.next_dir_offset;
}
}
// Find the file
FileMetadata file;
u32 file_offset = dir.first_file_offset;
while (file_offset != INVALID_FIELD) {
const u8* current_file = romfs + header.file_table_offset + file_offset;
std::memcpy(&file, current_file, sizeof(file));
if (MatchName(current_file + sizeof(file), file.name_length, file_name)) {
return romfs + header.data_offset + file.data_offset;
}
file_offset = file.next_file_offset;
}
return nullptr;
}
} // namespace RomFS

22
src/core/hle/romfs.h Normal file
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@ -0,0 +1,22 @@
// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <string>
#include <vector>
#include "common/common_types.h"
namespace RomFS {
/**
* Gets the pointer to a file in a RomFS image.
* @param romfs The pointer to the RomFS image
* @param path A vector containing the directory names and file name of the path to the file
* @return the pointer to the file
* @todo reimplement this with a full RomFS manager
*/
const u8* GetFilePointer(const u8* romfs, const std::vector<std::u16string>& path);
} // namespace RomFS

158
src/core/hle/service/apt/apt.cpp
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@ -6,11 +6,13 @@
#include "common/file_util.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/file_sys/file_backend.h"
#include "core/hle/applets/applet.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/mutex.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/romfs.h"
#include "core/hle/service/apt/apt.h"
#include "core/hle/service/apt/apt_a.h"
#include "core/hle/service/apt/apt_s.h"
@ -27,6 +29,7 @@ namespace APT {
/// Handle to shared memory region designated to for shared system font
static Kernel::SharedPtr<Kernel::SharedMemory> shared_font_mem;
static bool shared_font_loaded = false;
static bool shared_font_relocated = false;
static Kernel::SharedPtr<Kernel::Mutex> lock;
@ -71,7 +74,7 @@ void Initialize(Service::Interface* self) {
void GetSharedFont(Service::Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x44, 0, 0); // 0x00440000
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
if (!shared_font_mem) {
if (!shared_font_loaded) {
LOG_ERROR(Service_APT, "shared font file missing - go dump it from your 3ds");
rb.Push<u32>(-1); // TODO: Find the right error code
rb.Skip(1 + 2, true);
@ -644,6 +647,125 @@ void CheckNew3DS(Service::Interface* self) {
LOG_WARNING(Service_APT, "(STUBBED) called");
}
static u32 DecompressLZ11(const u8* in, u8* out) {
u32_le decompressed_size;
memcpy(&decompressed_size, in, sizeof(u32));
in += 4;
u8 type = decompressed_size & 0xFF;
ASSERT(type == 0x11);
decompressed_size >>= 8;
u32 current_out_size = 0;
u8 flags = 0, mask = 1;
while (current_out_size < decompressed_size) {
if (mask == 1) {
flags = *(in++);
mask = 0x80;
} else {
mask >>= 1;
}
if (flags & mask) {
u8 byte1 = *(in++);
u32 length = byte1 >> 4;
u32 offset;
if (length == 0) {
u8 byte2 = *(in++);
u8 byte3 = *(in++);
length = (((byte1 & 0x0F) << 4) | (byte2 >> 4)) + 0x11;
offset = (((byte2 & 0x0F) << 8) | byte3) + 0x1;
} else if (length == 1) {
u8 byte2 = *(in++);
u8 byte3 = *(in++);
u8 byte4 = *(in++);
length = (((byte1 & 0x0F) << 12) | (byte2 << 4) | (byte3 >> 4)) + 0x111;
offset = (((byte3 & 0x0F) << 8) | byte4) + 0x1;
} else {
u8 byte2 = *(in++);
length = (byte1 >> 4) + 0x1;
offset = (((byte1 & 0x0F) << 8) | byte2) + 0x1;
}
for (u32 i = 0; i < length; i++) {
*out = *(out - offset);
++out;
}
current_out_size += length;
} else {
*(out++) = *(in++);
current_out_size++;
}
}
return decompressed_size;
}
static bool LoadSharedFont() {
// TODO (wwylele): load 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);
auto archive_result = Service::FS::OpenArchive(Service::FS::ArchiveIdCode::NCCH, archive_path);
if (archive_result.Failed())
return false;
std::vector<u8> romfs_path(20, 0); // 20-byte all zero path for opening RomFS
FileSys::Path file_path(romfs_path);
FileSys::Mode open_mode = {};
open_mode.read_flag.Assign(1);
auto file_result = Service::FS::OpenFileFromArchive(*archive_result, file_path, open_mode);
if (file_result.Failed())
return false;
auto romfs = std::move(file_result).Unwrap();
std::vector<u8> romfs_buffer(romfs->backend->GetSize());
romfs->backend->Read(0, romfs_buffer.size(), romfs_buffer.data());
romfs->backend->Close();
const u8* font_file = RomFS::GetFilePointer(romfs_buffer.data(), {u"cbf_std.bcfnt.lz"});
if (font_file == nullptr)
return false;
struct {
u32_le status;
u32_le region;
u32_le decompressed_size;
INSERT_PADDING_WORDS(0x1D);
} shared_font_header{};
static_assert(sizeof(shared_font_header) == 0x80, "shared_font_header has incorrect size");
shared_font_header.status = 2; // successfully loaded
shared_font_header.region = 1; // region JPN/EUR/USA
shared_font_header.decompressed_size =
DecompressLZ11(font_file, shared_font_mem->GetPointer(0x80));
std::memcpy(shared_font_mem->GetPointer(), &shared_font_header, sizeof(shared_font_header));
*shared_font_mem->GetPointer(0x83) = 'U'; // Change the magic from "CFNT" to "CFNU"
return true;
}
static bool LoadLegacySharedFont() {
// This is the legacy method to load shared font.
// The expected format is a decrypted, uncompressed BCFNT file with the 0x80 byte header
// generated by the APT:U service. The best way to get is by dumping it from RAM. We've provided
// a homebrew app to do this: https://github.com/citra-emu/3dsutils. Put the resulting file
// "shared_font.bin" in the Citra "sysdata" directory.
std::string filepath = FileUtil::GetUserPath(D_SYSDATA_IDX) + SHARED_FONT;
FileUtil::CreateFullPath(filepath); // Create path if not already created
FileUtil::IOFile file(filepath, "rb");
if (file.IsOpen()) {
file.ReadBytes(shared_font_mem->GetPointer(), file.GetSize());
return true;
}
return false;
}
void Init() {
AddService(new APT_A_Interface);
AddService(new APT_S_Interface);
@ -651,29 +773,20 @@ void Init() {
HLE::Applets::Init();
// Load the shared system font (if available).
// The expected format is a decrypted, uncompressed BCFNT file with the 0x80 byte header
// generated by the APT:U service. The best way to get is by dumping it from RAM. We've provided
// a homebrew app to do this: https://github.com/citra-emu/3dsutils. Put the resulting file
// "shared_font.bin" in the Citra "sysdata" directory.
using Kernel::MemoryPermission;
shared_font_mem =
Kernel::SharedMemory::Create(nullptr, 0x332000, // 3272 KB
MemoryPermission::ReadWrite, MemoryPermission::Read, 0,
Kernel::MemoryRegion::SYSTEM, "APT:SharedFont");
std::string filepath = FileUtil::GetUserPath(D_SYSDATA_IDX) + SHARED_FONT;
FileUtil::CreateFullPath(filepath); // Create path if not already created
FileUtil::IOFile file(filepath, "rb");
if (file.IsOpen()) {
// Create shared font memory object
using Kernel::MemoryPermission;
shared_font_mem =
Kernel::SharedMemory::Create(nullptr, 0x332000, // 3272 KB
MemoryPermission::ReadWrite, MemoryPermission::Read, 0,
Kernel::MemoryRegion::SYSTEM, "APT:SharedFont");
// Read shared font data
file.ReadBytes(shared_font_mem->GetPointer(), file.GetSize());
if (LoadSharedFont()) {
shared_font_loaded = true;
} else if (LoadLegacySharedFont()) {
LOG_WARNING(Service_APT, "Loaded shared font by legacy method");
shared_font_loaded = true;
} else {
LOG_WARNING(Service_APT, "Unable to load shared font: %s", filepath.c_str());
shared_font_mem = nullptr;
LOG_WARNING(Service_APT, "Unable to load shared font");
shared_font_loaded = false;
}
lock = Kernel::Mutex::Create(false, "APT_U:Lock");
@ -693,6 +806,7 @@ void Init() {
void Shutdown() {
shared_font_mem = nullptr;
shared_font_loaded = false;
shared_font_relocated = false;
lock = nullptr;
notification_event = nullptr;