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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/component_updater/swiftshader_component_installer.h"
#include "base/base_paths.h"
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/cpu.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "base/values.h"
#include "chrome/browser/component_updater/component_updater_service.h"
#include "chrome/common/chrome_paths.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/gpu_data_manager.h"
#include "content/public/browser/gpu_data_manager_observer.h"
#include "gpu/config/gpu_feature_type.h"
using content::BrowserThread;
using content::GpuDataManager;
namespace {
// CRX hash. The extension id is: nhfgdggnnopgbfdlpeoalgcjdgfafocg.
const uint8 kSha2Hash[] = {0xd7, 0x56, 0x36, 0x6d, 0xde, 0xf6, 0x15, 0x3b,
0xf4, 0xe0, 0xb6, 0x29, 0x36, 0x50, 0x5e, 0x26,
0xbd, 0x77, 0x8b, 0x8e, 0x35, 0xc2, 0x7e, 0x43,
0x52, 0x47, 0x62, 0xed, 0x12, 0xca, 0xcc, 0x6a};
// File name of the internal SwiftShader plugin on different platforms.
const base::FilePath::CharType kSwiftShaderEglName[] =
FILE_PATH_LITERAL("libegl.dll");
const base::FilePath::CharType kSwiftShaderGlesName[] =
FILE_PATH_LITERAL("libglesv2.dll");
const char kSwiftShaderManifestName[] = "SwiftShader";
const base::FilePath::CharType kSwiftShaderBaseDirectory[] =
FILE_PATH_LITERAL("SwiftShader");
// If we don't have a SwiftShader component, this is the version we claim.
const char kNullVersion[] = "0.0.0.0";
// The base directory on windows looks like:
// <profile>\AppData\Local\Google\Chrome\User Data\SwiftShader\.
base::FilePath GetSwiftShaderBaseDirectory() {
base::FilePath result;
PathService::Get(chrome::DIR_USER_DATA, &result);
return result.Append(kSwiftShaderBaseDirectory);
}
// SwiftShader has version encoded in the path itself
// so we need to enumerate the directories to find the full path.
// On success it returns something like:
// <profile>\AppData\Local\Google\Chrome\User Data\SwiftShader\10.3.44.555\.
bool GetLatestSwiftShaderDirectory(base::FilePath* result,
Version* latest,
std::vector<base::FilePath>* older_dirs) {
base::FilePath base_dir = GetSwiftShaderBaseDirectory();
bool found = false;
file_util::FileEnumerator
file_enumerator(base_dir, false, file_util::FileEnumerator::DIRECTORIES);
for (base::FilePath path = file_enumerator.Next(); !path.value().empty();
path = file_enumerator.Next()) {
Version version(path.BaseName().MaybeAsASCII());
if (!version.IsValid())
continue;
if (version.CompareTo(*latest) > 0 &&
file_util::PathExists(path.Append(kSwiftShaderEglName)) &&
file_util::PathExists(path.Append(kSwiftShaderGlesName))) {
if (found && older_dirs)
older_dirs->push_back(*result);
*latest = version;
*result = path;
found = true;
} else {
if (older_dirs)
older_dirs->push_back(path);
}
}
return found;
}
void RegisterSwiftShaderWithChrome(const base::FilePath& path) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
GpuDataManager::GetInstance()->RegisterSwiftShaderPath(path);
}
} // namespace
class SwiftShaderComponentInstaller : public ComponentInstaller {
public:
explicit SwiftShaderComponentInstaller(const Version& version);
virtual ~SwiftShaderComponentInstaller() {}
virtual void OnUpdateError(int error) OVERRIDE;
virtual bool Install(const base::DictionaryValue& manifest,
const base::FilePath& unpack_path) OVERRIDE;
private:
Version current_version_;
};
SwiftShaderComponentInstaller::SwiftShaderComponentInstaller(
const Version& version) : current_version_(version) {
DCHECK(version.IsValid());
}
void SwiftShaderComponentInstaller::OnUpdateError(int error) {
NOTREACHED() << "SwiftShader update error: " << error;
}
bool SwiftShaderComponentInstaller::Install(
const base::DictionaryValue& manifest,
const base::FilePath& unpack_path) {
std::string name;
manifest.GetStringASCII("name", &name);
if (name != kSwiftShaderManifestName)
return false;
std::string proposed_version;
manifest.GetStringASCII("version", &proposed_version);
Version version(proposed_version.c_str());
if (!version.IsValid())
return false;
if (current_version_.CompareTo(version) >= 0)
return false;
if (!file_util::PathExists(unpack_path.Append(kSwiftShaderEglName)) ||
!file_util::PathExists(unpack_path.Append(kSwiftShaderGlesName)))
return false;
// Passed the basic tests. Time to install it.
base::FilePath path =
GetSwiftShaderBaseDirectory().AppendASCII(version.GetString());
if (file_util::PathExists(path))
return false;
if (!file_util::Move(unpack_path, path))
return false;
// Installation is done. Now tell the rest of chrome.
current_version_ = version;
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&RegisterSwiftShaderWithChrome, path));
return true;
}
void FinishSwiftShaderUpdateRegistration(ComponentUpdateService* cus,
const Version& version) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
CrxComponent swiftshader;
swiftshader.name = "Swift Shader";
swiftshader.installer = new SwiftShaderComponentInstaller(version);
swiftshader.version = version;
swiftshader.pk_hash.assign(kSha2Hash, &kSha2Hash[sizeof(kSha2Hash)]);
if (cus->RegisterComponent(swiftshader) != ComponentUpdateService::kOk) {
NOTREACHED() << "SwiftShader component registration fail";
}
}
class UpdateChecker : public content::GpuDataManagerObserver {
public:
explicit UpdateChecker(ComponentUpdateService* cus);
virtual void OnGpuInfoUpdate() OVERRIDE;
private:
ComponentUpdateService* cus_;
};
UpdateChecker::UpdateChecker(ComponentUpdateService* cus)
: cus_(cus) {
}
void UpdateChecker::OnGpuInfoUpdate() {
GpuDataManager *gpu_data_manager = GpuDataManager::GetInstance();
if (!gpu_data_manager->GpuAccessAllowed(NULL) ||
gpu_data_manager->IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_WEBGL) ||
gpu_data_manager->ShouldUseSwiftShader()) {
gpu_data_manager->RemoveObserver(this);
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::FilePath path = GetSwiftShaderBaseDirectory();
Version version(kNullVersion);
GetLatestSwiftShaderDirectory(&path, &version, NULL);
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&FinishSwiftShaderUpdateRegistration, cus_, version));
}
}
// Check if there already is a version of swiftshader installed,
// and if so register it.
void RegisterSwiftShaderPath(ComponentUpdateService* cus) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::FilePath path = GetSwiftShaderBaseDirectory();
if (!file_util::PathExists(path)) {
if (!file_util::CreateDirectory(path)) {
NOTREACHED() << "Could not create SwiftShader directory.";
return;
}
}
Version version(kNullVersion);
std::vector<base::FilePath> older_dirs;
if (GetLatestSwiftShaderDirectory(&path, &version, &older_dirs))
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&RegisterSwiftShaderWithChrome, path));
UpdateChecker *update_checker = new UpdateChecker(cus);
GpuDataManager::GetInstance()->AddObserver(update_checker);
update_checker->OnGpuInfoUpdate();
// We leak update_checker here, because it has to stick around for the life
// of the GpuDataManager.
// Remove older versions of SwiftShader.
for (std::vector<base::FilePath>::iterator iter = older_dirs.begin();
iter != older_dirs.end(); ++iter) {
file_util::Delete(*iter, true);
}
}
void RegisterSwiftShaderComponent(ComponentUpdateService* cus) {
#if defined(ENABLE_SWIFTSHADER)
base::CPU cpu;
if (!cpu.has_sse2())
return;
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&RegisterSwiftShaderPath, cus));
#endif
}
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