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gfxPrefs.cpp
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gfxPrefs.cpp
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gfxPrefs.h"
#include "MainThreadUtils.h"
#include "nsXULAppAPI.h"
#include "mozilla/Preferences.h"
#include "mozilla/Unused.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/gfx/GPUChild.h"
#include "mozilla/gfx/GPUProcessManager.h"
#include "VRProcessManager.h"
#include "VRChild.h"
using namespace mozilla;
nsTArray<gfxPrefs::Pref*>* gfxPrefs::sGfxPrefList = nullptr;
gfxPrefs* gfxPrefs::sInstance = nullptr;
bool gfxPrefs::sInstanceHasBeenDestroyed = false;
gfxPrefs& gfxPrefs::CreateAndInitializeSingleton() {
MOZ_ASSERT(!sInstanceHasBeenDestroyed,
"Should never recreate a gfxPrefs instance!");
sGfxPrefList = new nsTArray<Pref*>();
sInstance = new gfxPrefs;
sInstance->Init();
MOZ_ASSERT(SingletonExists());
return *sInstance;
}
void gfxPrefs::DestroySingleton() {
if (sInstance) {
delete sInstance;
sInstance = nullptr;
sInstanceHasBeenDestroyed = true;
}
MOZ_ASSERT(!SingletonExists());
}
bool gfxPrefs::SingletonExists() { return sInstance != nullptr; }
gfxPrefs::gfxPrefs() {
// UI, content, and plugin processes use XPCOM and should have prefs
// ready by the time we initialize gfxPrefs.
MOZ_ASSERT_IF(XRE_IsContentProcess() || XRE_IsParentProcess() ||
XRE_GetProcessType() == GeckoProcessType_Plugin,
Preferences::IsServiceAvailable());
gfxPrefs::AssertMainThread();
}
void gfxPrefs::Init() {
// Set up Moz2D prefs.
SetGfxLoggingLevelChangeCallback([](const GfxPrefValue& aValue) -> void {
mozilla::gfx::LoggingPrefs::sGfxLogLevel = aValue.get_int32_t();
});
}
gfxPrefs::~gfxPrefs() {
gfxPrefs::AssertMainThread();
SetGfxLoggingLevelChangeCallback(nullptr);
delete sGfxPrefList;
sGfxPrefList = nullptr;
}
void gfxPrefs::AssertMainThread() {
MOZ_ASSERT(NS_IsMainThread(), "this code must be run on the main thread");
}
void gfxPrefs::Pref::OnChange() {
if (auto gpm = gfx::GPUProcessManager::Get()) {
if (gfx::GPUChild* gpu = gpm->GetGPUChild()) {
GfxPrefValue value;
GetLiveValue(&value);
Unused << gpu->SendUpdatePref(gfx::GfxPrefSetting(mIndex, value));
}
}
if (auto vpm = gfx::VRProcessManager::Get()) {
if (gfx::VRChild* vr = vpm->GetVRChild()) {
GfxPrefValue value;
GetLiveValue(&value);
Unused << vr->SendUpdatePref(gfx::GfxPrefSetting(mIndex, value));
}
}
FireChangeCallback();
}
void gfxPrefs::Pref::FireChangeCallback() {
if (mChangeCallback) {
GfxPrefValue value;
GetLiveValue(&value);
mChangeCallback(value);
}
}
void gfxPrefs::Pref::SetChangeCallback(ChangeCallback aCallback) {
mChangeCallback = aCallback;
if (!IsParentProcess() && IsPrefsServiceAvailable()) {
// If we're in the parent process, we watch prefs by default so we can
// send changes over to the GPU process. Otherwise, we need to add or
// remove a watch for the pref now.
if (aCallback) {
WatchChanges(Name(), this);
} else {
UnwatchChanges(Name(), this);
}
}
// Fire the callback once to make initialization easier for the caller.
FireChangeCallback();
}
// On lightweight processes such as for GMP and GPU, XPCOM is not initialized,
// and therefore we don't have access to Preferences. When XPCOM is not
// available we rely on manual synchronization of gfxPrefs values over IPC.
/* static */ bool gfxPrefs::IsPrefsServiceAvailable() {
return Preferences::IsServiceAvailable();
}
/* static */ bool gfxPrefs::IsParentProcess() { return XRE_IsParentProcess(); }
void gfxPrefs::PrefAddVarCache(bool* aVariable, const nsACString& aPref,
bool aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddBoolVarCache(aVariable, aPref, aDefault);
}
void gfxPrefs::PrefAddVarCache(int32_t* aVariable, const nsACString& aPref,
int32_t aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddIntVarCache(aVariable, aPref, aDefault);
}
void gfxPrefs::PrefAddVarCache(uint32_t* aVariable, const nsACString& aPref,
uint32_t aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddUintVarCache(aVariable, aPref, aDefault);
}
void gfxPrefs::PrefAddVarCache(float* aVariable, const nsACString& aPref,
float aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddFloatVarCache(aVariable, aPref, aDefault);
}
void gfxPrefs::PrefAddVarCache(std::string* aVariable, const nsCString& aPref,
std::string aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::SetCString(aPref.get(), aVariable->c_str());
}
void gfxPrefs::PrefAddVarCache(AtomicBool* aVariable, const nsACString& aPref,
bool aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddAtomicBoolVarCache(aVariable, aPref, aDefault);
}
void gfxPrefs::PrefAddVarCache(AtomicInt32* aVariable, const nsACString& aPref,
int32_t aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddAtomicIntVarCache(aVariable, aPref, aDefault);
}
void gfxPrefs::PrefAddVarCache(AtomicUint32* aVariable, const nsACString& aPref,
uint32_t aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::AddAtomicUintVarCache(aVariable, aPref, aDefault);
}
bool gfxPrefs::PrefGet(const char* aPref, bool aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
return Preferences::GetBool(aPref, aDefault);
}
int32_t gfxPrefs::PrefGet(const char* aPref, int32_t aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
return Preferences::GetInt(aPref, aDefault);
}
uint32_t gfxPrefs::PrefGet(const char* aPref, uint32_t aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
return Preferences::GetUint(aPref, aDefault);
}
float gfxPrefs::PrefGet(const char* aPref, float aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
return Preferences::GetFloat(aPref, aDefault);
}
std::string gfxPrefs::PrefGet(const char* aPref, std::string aDefault) {
MOZ_ASSERT(IsPrefsServiceAvailable());
nsAutoCString result;
Preferences::GetCString(aPref, result);
if (result.IsEmpty()) {
return aDefault;
}
return result.get();
}
void gfxPrefs::PrefSet(const char* aPref, bool aValue) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::SetBool(aPref, aValue);
}
void gfxPrefs::PrefSet(const char* aPref, int32_t aValue) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::SetInt(aPref, aValue);
}
void gfxPrefs::PrefSet(const char* aPref, uint32_t aValue) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::SetUint(aPref, aValue);
}
void gfxPrefs::PrefSet(const char* aPref, float aValue) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::SetFloat(aPref, aValue);
}
void gfxPrefs::PrefSet(const char* aPref, std::string aValue) {
MOZ_ASSERT(IsPrefsServiceAvailable());
Preferences::SetCString(aPref, aValue.c_str());
}
static void OnGfxPrefChanged(const char* aPrefname, gfxPrefs::Pref* aPref) {
aPref->OnChange();
}
void gfxPrefs::WatchChanges(const char* aPrefname, Pref* aPref) {
MOZ_ASSERT(IsPrefsServiceAvailable());
nsCString name;
name.AssignLiteral(aPrefname, strlen(aPrefname));
Preferences::RegisterCallback(OnGfxPrefChanged, name, aPref);
}
void gfxPrefs::UnwatchChanges(const char* aPrefname, Pref* aPref) {
// The Preferences service can go offline before gfxPrefs is destroyed.
if (IsPrefsServiceAvailable()) {
Preferences::UnregisterCallback(OnGfxPrefChanged,
nsDependentCString(aPrefname), aPref);
}
}
void gfxPrefs::CopyPrefValue(const bool* aValue, GfxPrefValue* aOutValue) {
*aOutValue = *aValue;
}
void gfxPrefs::CopyPrefValue(const int32_t* aValue, GfxPrefValue* aOutValue) {
*aOutValue = *aValue;
}
void gfxPrefs::CopyPrefValue(const uint32_t* aValue, GfxPrefValue* aOutValue) {
*aOutValue = *aValue;
}
void gfxPrefs::CopyPrefValue(const float* aValue, GfxPrefValue* aOutValue) {
*aOutValue = *aValue;
}
void gfxPrefs::CopyPrefValue(const std::string* aValue,
GfxPrefValue* aOutValue) {
*aOutValue = nsCString(aValue->c_str());
}
void gfxPrefs::CopyPrefValue(const GfxPrefValue* aValue, bool* aOutValue) {
*aOutValue = aValue->get_bool();
}
void gfxPrefs::CopyPrefValue(const GfxPrefValue* aValue, int32_t* aOutValue) {
*aOutValue = aValue->get_int32_t();
}
void gfxPrefs::CopyPrefValue(const GfxPrefValue* aValue, uint32_t* aOutValue) {
*aOutValue = aValue->get_uint32_t();
}
void gfxPrefs::CopyPrefValue(const GfxPrefValue* aValue, float* aOutValue) {
*aOutValue = aValue->get_float();
}
void gfxPrefs::CopyPrefValue(const GfxPrefValue* aValue,
std::string* aOutValue) {
*aOutValue = aValue->get_nsCString().get();
}
bool gfxPrefs::OverrideBase_WebRender() { return gfx::gfxVars::UseWebRender(); }