dolphin/Source/Core/UICommon/ResourcePack/ResourcePack.cpp

329 lines
7.4 KiB
C++

// Copyright 2018 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "UICommon/ResourcePack/ResourcePack.h"
#include <algorithm>
#include <minizip/unzip.h>
#include "Common/FileSearch.h"
#include "Common/FileUtil.h"
#include "Common/StringUtil.h"
#include "UICommon/ResourcePack/Manager.h"
#include "UICommon/ResourcePack/Manifest.h"
static const char* TEXTURE_PATH = "Load/Textures/";
namespace ResourcePack
{
// Since minzip doesn't provide a way to unzip a file of a length > 65535, we have to implement
// this ourselves
static bool ReadCurrentFileUnlimited(unzFile file, std::vector<char>& destination)
{
const uint32_t MAX_BUFFER_SIZE = 65535;
if (unzOpenCurrentFile(file) != UNZ_OK)
return false;
uint32_t bytes_to_go = static_cast<uint32_t>(destination.size());
while (bytes_to_go > 0)
{
int bytes_read = unzReadCurrentFile(file, &destination[destination.size() - bytes_to_go],
std::min(bytes_to_go, MAX_BUFFER_SIZE));
if (bytes_read < 0)
{
unzCloseCurrentFile(file);
return false;
}
bytes_to_go -= bytes_read;
}
unzCloseCurrentFile(file);
return true;
}
ResourcePack::ResourcePack(const std::string& path) : m_path(path)
{
auto file = unzOpen(path.c_str());
if (file == nullptr)
{
m_valid = false;
m_error = "Failed to open resource pack";
return;
}
if (unzLocateFile(file, "manifest.json", 0) == UNZ_END_OF_LIST_OF_FILE)
{
m_valid = false;
m_error = "Resource pack is missing a manifest.";
return;
}
unz_file_info manifest_info;
unzGetCurrentFileInfo(file, &manifest_info, nullptr, 0, nullptr, 0, nullptr, 0);
std::vector<char> manifest_contents;
manifest_contents.resize(manifest_info.uncompressed_size);
if (!ReadCurrentFileUnlimited(file, manifest_contents))
{
m_valid = false;
m_error = "Failed to read manifest.json";
return;
}
unzCloseCurrentFile(file);
m_manifest =
std::make_shared<Manifest>(std::string(manifest_contents.begin(), manifest_contents.end()));
if (!m_manifest->IsValid())
{
m_valid = false;
m_error = "Manifest error: " + m_manifest->GetError();
return;
}
if (unzLocateFile(file, "logo.png", 0) != UNZ_END_OF_LIST_OF_FILE)
{
unz_file_info logo_info;
unzGetCurrentFileInfo(file, &logo_info, nullptr, 0, nullptr, 0, nullptr, 0);
m_logo_data.resize(logo_info.uncompressed_size);
if (!ReadCurrentFileUnlimited(file, m_logo_data))
{
m_valid = false;
m_error = "Failed to read logo.png";
return;
}
}
unzGoToFirstFile(file);
do
{
std::string filename;
filename.resize(256);
unz_file_info texture_info;
unzGetCurrentFileInfo(file, &texture_info, &filename[0], static_cast<uint16_t>(filename.size()),
nullptr, 0, nullptr, 0);
if (filename.compare(0, 9, "textures/") != 0 || texture_info.uncompressed_size == 0)
continue;
// If a texture is compressed and the manifest doesn't state that, abort.
if (!m_manifest->IsCompressed() && texture_info.compression_method != 0)
{
m_valid = false;
m_error = "Texture " + filename + " is compressed!";
return;
}
m_textures.push_back(filename.substr(9));
} while (unzGoToNextFile(file) != UNZ_END_OF_LIST_OF_FILE);
unzClose(file);
}
bool ResourcePack::IsValid() const
{
return m_valid;
}
const std::vector<char>& ResourcePack::GetLogo() const
{
return m_logo_data;
}
const std::string& ResourcePack::GetPath() const
{
return m_path;
}
const std::string& ResourcePack::GetError() const
{
return m_error;
}
const Manifest* ResourcePack::GetManifest() const
{
return m_manifest.get();
}
const std::vector<std::string>& ResourcePack::GetTextures() const
{
return m_textures;
}
bool ResourcePack::Install(const std::string& path)
{
if (!IsValid())
{
m_error = "Invalid pack";
return false;
}
auto file = unzOpen(m_path.c_str());
for (const auto& texture : m_textures)
{
bool provided_by_other_pack = false;
// Check if a higher priority pack already provides a given texture, don't overwrite it
for (const auto& pack : GetHigherPriorityPacks(*this))
{
if (std::find(pack->GetTextures().begin(), pack->GetTextures().end(), texture) !=
pack->GetTextures().end())
{
provided_by_other_pack = true;
break;
}
}
if (provided_by_other_pack)
continue;
if (unzLocateFile(file, ("textures/" + texture).c_str(), 0) != UNZ_OK)
{
m_error = "Failed to locate texture " + texture;
return false;
}
std::string m_full_dir;
SplitPath(path + TEXTURE_PATH + texture, &m_full_dir, nullptr, nullptr);
if (!File::CreateFullPath(m_full_dir))
{
m_error = "Failed to create full path " + m_full_dir;
return false;
}
unz_file_info texture_info;
unzGetCurrentFileInfo(file, &texture_info, nullptr, 0, nullptr, 0, nullptr, 0);
std::vector<char> data;
data.resize(texture_info.uncompressed_size);
if (!ReadCurrentFileUnlimited(file, data))
{
m_error = "Failed to read texture " + texture;
return false;
}
std::ofstream out(path + TEXTURE_PATH + texture, std::ios::trunc | std::ios::binary);
if (!out.good())
{
m_error = "Failed to write " + texture;
return false;
}
out.write(data.data(), data.size());
out.flush();
}
unzClose(file);
SetInstalled(*this, true);
return true;
}
bool ResourcePack::Uninstall(const std::string& path)
{
if (!IsValid())
{
m_error = "Invalid pack";
return false;
}
auto lower = GetLowerPriorityPacks(*this);
SetInstalled(*this, false);
for (const auto& texture : m_textures)
{
bool provided_by_other_pack = false;
// Check if a higher priority pack already provides a given texture, don't delete it
for (const auto& pack : GetHigherPriorityPacks(*this))
{
if (::ResourcePack::IsInstalled(*pack) &&
std::find(pack->GetTextures().begin(), pack->GetTextures().end(), texture) !=
pack->GetTextures().end())
{
provided_by_other_pack = true;
break;
}
}
if (provided_by_other_pack)
continue;
// Check if a lower priority pack provides a given texture - if so, install it.
for (auto& pack : lower)
{
if (::ResourcePack::IsInstalled(*pack) &&
std::find(pack->GetTextures().rbegin(), pack->GetTextures().rend(), texture) !=
pack->GetTextures().rend())
{
pack->Install(path);
provided_by_other_pack = true;
break;
}
}
if (provided_by_other_pack)
continue;
if (File::Exists(path + TEXTURE_PATH + texture) && !File::Delete(path + TEXTURE_PATH + texture))
{
m_error = "Failed to delete texture " + texture;
return false;
}
// Recursively delete empty directories
std::string dir;
SplitPath(path + TEXTURE_PATH + texture, &dir, nullptr, nullptr);
while (dir.length() > (path + TEXTURE_PATH).length())
{
auto is_empty = Common::DoFileSearch({dir}).empty();
if (is_empty)
File::DeleteDir(dir);
SplitPath(dir.substr(0, dir.size() - 2), &dir, nullptr, nullptr);
}
}
return true;
}
bool ResourcePack::operator==(const ResourcePack& pack)
{
return pack.GetPath() == m_path;
}
} // namespace ResourcePack