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nsBaseWidget.cpp
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/* -*- Mode: C++; tab-width: 2; 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 "mozilla/ArrayUtils.h"
#include "mozilla/layers/CompositorChild.h"
#include "mozilla/layers/CompositorParent.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "nsBaseWidget.h"
#include "nsDeviceContext.h"
#include "nsCOMPtr.h"
#include "nsGfxCIID.h"
#include "nsWidgetsCID.h"
#include "nsServiceManagerUtils.h"
#include "nsIScreenManager.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsISimpleEnumerator.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIServiceManager.h"
#include "mozilla/Preferences.h"
#include "BasicLayers.h"
#include "ClientLayerManager.h"
#include "mozilla/layers/Compositor.h"
#include "nsIXULRuntime.h"
#include "nsIXULWindow.h"
#include "nsIBaseWindow.h"
#include "nsXULPopupManager.h"
#include "nsIWidgetListener.h"
#include "nsIGfxInfo.h"
#include "npapi.h"
#include "base/thread.h"
#include "prdtoa.h"
#include "prenv.h"
#include "mozilla/Attributes.h"
#include "mozilla/unused.h"
#include "nsContentUtils.h"
#include "gfxPrefs.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/MouseEvents.h"
#include "GLConsts.h"
#include "LayerScope.h"
#include "mozilla/unused.h"
#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif
#ifdef DEBUG
#include "nsIObserver.h"
static void debug_RegisterPrefCallbacks();
#endif
#ifdef NOISY_WIDGET_LEAKS
static int32_t gNumWidgets;
#endif
#ifdef XP_MACOSX
#include "nsCocoaFeatures.h"
#endif
nsIRollupListener* nsBaseWidget::gRollupListener = nullptr;
using namespace mozilla::layers;
using namespace mozilla::ipc;
using namespace mozilla;
using base::Thread;
nsIContent* nsBaseWidget::mLastRollup = nullptr;
// Global user preference for disabling native theme. Used
// in NativeWindowTheme.
bool gDisableNativeTheme = false;
// Async pump timer during injected long touch taps
#define TOUCH_INJECT_PUMP_TIMER_MSEC 50
#define TOUCH_INJECT_LONG_TAP_DEFAULT_MSEC 1500
int32_t nsIWidget::sPointerIdCounter = 0;
// nsBaseWidget
NS_IMPL_ISUPPORTS(nsBaseWidget, nsIWidget)
nsAutoRollup::nsAutoRollup()
{
// remember if mLastRollup was null, and only clear it upon destruction
// if so. This prevents recursive usage of nsAutoRollup from clearing
// mLastRollup when it shouldn't.
wasClear = !nsBaseWidget::mLastRollup;
}
nsAutoRollup::~nsAutoRollup()
{
if (nsBaseWidget::mLastRollup && wasClear) {
NS_RELEASE(nsBaseWidget::mLastRollup);
}
}
//-------------------------------------------------------------------------
//
// nsBaseWidget constructor
//
//-------------------------------------------------------------------------
nsBaseWidget::nsBaseWidget()
: mWidgetListener(nullptr)
, mAttachedWidgetListener(nullptr)
, mContext(nullptr)
, mCursor(eCursor_standard)
, mUpdateCursor(true)
, mBorderStyle(eBorderStyle_none)
, mUseLayersAcceleration(false)
, mForceLayersAcceleration(false)
, mTemporarilyUseBasicLayerManager(false)
, mUseAttachedEvents(false)
, mContextInitialized(false)
, mBounds(0,0,0,0)
, mOriginalBounds(nullptr)
, mClipRectCount(0)
, mSizeMode(nsSizeMode_Normal)
, mPopupLevel(ePopupLevelTop)
, mPopupType(ePopupTypeAny)
{
#ifdef NOISY_WIDGET_LEAKS
gNumWidgets++;
printf("WIDGETS+ = %d\n", gNumWidgets);
#endif
#ifdef DEBUG
debug_RegisterPrefCallbacks();
#endif
mShutdownObserver = new WidgetShutdownObserver(this);
nsContentUtils::RegisterShutdownObserver(mShutdownObserver);
}
NS_IMPL_ISUPPORTS(WidgetShutdownObserver, nsIObserver)
NS_IMETHODIMP
WidgetShutdownObserver::Observe(nsISupports *aSubject,
const char *aTopic,
const char16_t *aData)
{
if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0 &&
mWidget) {
mWidget->Shutdown();
nsContentUtils::UnregisterShutdownObserver(this);
}
return NS_OK;
}
void
nsBaseWidget::Shutdown()
{
DestroyCompositor();
mShutdownObserver = nullptr;
}
static void DeferredDestroyCompositor(CompositorParent* aCompositorParent,
CompositorChild* aCompositorChild)
{
// Bug 848949 needs to be fixed before
// we can close the channel properly
//aCompositorChild->Close();
aCompositorParent->Release();
aCompositorChild->Release();
}
void nsBaseWidget::DestroyCompositor()
{
LayerScope::DeInit();
if (mCompositorChild) {
mCompositorChild->SendWillStop();
mCompositorChild->Destroy();
// The call just made to SendWillStop can result in IPC from the
// CompositorParent to the CompositorChild (e.g. caused by the destruction
// of shared memory). We need to ensure this gets processed by the
// CompositorChild before it gets destroyed. It suffices to ensure that
// events already in the MessageLoop get processed before the
// CompositorChild is destroyed, so we add a task to the MessageLoop to
// handle compositor desctruction.
MessageLoop::current()->PostTask(FROM_HERE,
NewRunnableFunction(DeferredDestroyCompositor, mCompositorParent,
mCompositorChild));
// The DestroyCompositor task we just added to the MessageLoop will handle
// releasing mCompositorParent and mCompositorChild.
unused << mCompositorParent.forget();
unused << mCompositorChild.forget();
}
}
//-------------------------------------------------------------------------
//
// nsBaseWidget destructor
//
//-------------------------------------------------------------------------
nsBaseWidget::~nsBaseWidget()
{
if (mLayerManager &&
mLayerManager->GetBackendType() == LayersBackend::LAYERS_BASIC) {
static_cast<BasicLayerManager*>(mLayerManager.get())->ClearRetainerWidget();
}
if (mLayerManager) {
mLayerManager->Destroy();
mLayerManager = nullptr;
}
if (mShutdownObserver) {
// If the shutdown observer is currently processing observers,
// then UnregisterShutdownObserver won't stop our Observer
// function from being called. Make sure we don't try
// to reference the dead widget.
mShutdownObserver->mWidget = nullptr;
nsContentUtils::UnregisterShutdownObserver(mShutdownObserver);
}
DestroyCompositor();
#ifdef NOISY_WIDGET_LEAKS
gNumWidgets--;
printf("WIDGETS- = %d\n", gNumWidgets);
#endif
NS_IF_RELEASE(mContext);
delete mOriginalBounds;
}
//-------------------------------------------------------------------------
//
// Basic create.
//
//-------------------------------------------------------------------------
void nsBaseWidget::BaseCreate(nsIWidget *aParent,
const nsIntRect &aRect,
nsDeviceContext *aContext,
nsWidgetInitData *aInitData)
{
static bool gDisableNativeThemeCached = false;
if (!gDisableNativeThemeCached) {
Preferences::AddBoolVarCache(&gDisableNativeTheme,
"mozilla.widget.disable-native-theme",
gDisableNativeTheme);
gDisableNativeThemeCached = true;
}
// keep a reference to the device context
if (aContext) {
mContext = aContext;
NS_ADDREF(mContext);
}
else {
mContext = new nsDeviceContext();
NS_ADDREF(mContext);
mContext->Init(nullptr);
}
if (nullptr != aInitData) {
mWindowType = aInitData->mWindowType;
mBorderStyle = aInitData->mBorderStyle;
mPopupLevel = aInitData->mPopupLevel;
mPopupType = aInitData->mPopupHint;
mRequireOffMainThreadCompositing = aInitData->mRequireOffMainThreadCompositing;
}
if (aParent) {
aParent->AddChild(this);
}
}
NS_IMETHODIMP nsBaseWidget::CaptureMouse(bool aCapture)
{
return NS_OK;
}
//-------------------------------------------------------------------------
//
// Accessor functions to get/set the client data
//
//-------------------------------------------------------------------------
nsIWidgetListener* nsBaseWidget::GetWidgetListener()
{
return mWidgetListener;
}
void nsBaseWidget::SetWidgetListener(nsIWidgetListener* aWidgetListener)
{
mWidgetListener = aWidgetListener;
}
already_AddRefed<nsIWidget>
nsBaseWidget::CreateChild(const nsIntRect &aRect,
nsDeviceContext *aContext,
nsWidgetInitData *aInitData,
bool aForceUseIWidgetParent)
{
nsIWidget* parent = this;
nsNativeWidget nativeParent = nullptr;
if (!aForceUseIWidgetParent) {
// Use only either parent or nativeParent, not both, to match
// existing code. Eventually Create() should be divested of its
// nativeWidget parameter.
nativeParent = parent ? parent->GetNativeData(NS_NATIVE_WIDGET) : nullptr;
parent = nativeParent ? nullptr : parent;
NS_ABORT_IF_FALSE(!parent || !nativeParent, "messed up logic");
}
nsCOMPtr<nsIWidget> widget;
if (aInitData && aInitData->mWindowType == eWindowType_popup) {
widget = AllocateChildPopupWidget();
} else {
static NS_DEFINE_IID(kCChildCID, NS_CHILD_CID);
widget = do_CreateInstance(kCChildCID);
}
if (widget &&
NS_SUCCEEDED(widget->Create(parent, nativeParent, aRect,
aContext, aInitData))) {
return widget.forget();
}
return nullptr;
}
// Attach a view to our widget which we'll send events to.
NS_IMETHODIMP
nsBaseWidget::AttachViewToTopLevel(bool aUseAttachedEvents,
nsDeviceContext *aContext)
{
NS_ASSERTION((mWindowType == eWindowType_toplevel ||
mWindowType == eWindowType_dialog ||
mWindowType == eWindowType_invisible ||
mWindowType == eWindowType_child),
"Can't attach to window of that type");
mUseAttachedEvents = aUseAttachedEvents;
if (aContext) {
if (mContext) {
NS_IF_RELEASE(mContext);
}
mContext = aContext;
NS_ADDREF(mContext);
}
return NS_OK;
}
nsIWidgetListener* nsBaseWidget::GetAttachedWidgetListener()
{
return mAttachedWidgetListener;
}
void nsBaseWidget::SetAttachedWidgetListener(nsIWidgetListener* aListener)
{
mAttachedWidgetListener = aListener;
}
//-------------------------------------------------------------------------
//
// Close this nsBaseWidget
//
//-------------------------------------------------------------------------
NS_METHOD nsBaseWidget::Destroy()
{
// Just in case our parent is the only ref to us
nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
// disconnect from the parent
nsIWidget *parent = GetParent();
if (parent) {
parent->RemoveChild(this);
}
return NS_OK;
}
//-------------------------------------------------------------------------
//
// Set this nsBaseWidget's parent
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsBaseWidget::SetParent(nsIWidget* aNewParent)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
//-------------------------------------------------------------------------
//
// Get this nsBaseWidget parent
//
//-------------------------------------------------------------------------
nsIWidget* nsBaseWidget::GetParent(void)
{
return nullptr;
}
//-------------------------------------------------------------------------
//
// Get this nsBaseWidget top level widget
//
//-------------------------------------------------------------------------
nsIWidget* nsBaseWidget::GetTopLevelWidget()
{
nsIWidget *topLevelWidget = nullptr, *widget = this;
while (widget) {
topLevelWidget = widget;
widget = widget->GetParent();
}
return topLevelWidget;
}
//-------------------------------------------------------------------------
//
// Get this nsBaseWidget's top (non-sheet) parent (if it's a sheet)
//
//-------------------------------------------------------------------------
nsIWidget* nsBaseWidget::GetSheetWindowParent(void)
{
return nullptr;
}
float nsBaseWidget::GetDPI()
{
return 96.0f;
}
CSSToLayoutDeviceScale nsIWidget::GetDefaultScale()
{
double devPixelsPerCSSPixel = DefaultScaleOverride();
if (devPixelsPerCSSPixel <= 0.0) {
devPixelsPerCSSPixel = GetDefaultScaleInternal();
}
return CSSToLayoutDeviceScale(devPixelsPerCSSPixel);
}
/* static */
double nsIWidget::DefaultScaleOverride()
{
// The number of device pixels per CSS pixel. A value <= 0 means choose
// automatically based on the DPI. A positive value is used as-is. This effectively
// controls the size of a CSS "px".
double devPixelsPerCSSPixel = -1.0;
nsAdoptingCString prefString = Preferences::GetCString("layout.css.devPixelsPerPx");
if (!prefString.IsEmpty()) {
devPixelsPerCSSPixel = PR_strtod(prefString, nullptr);
}
return devPixelsPerCSSPixel;
}
//-------------------------------------------------------------------------
//
// Add a child to the list of children
//
//-------------------------------------------------------------------------
void nsBaseWidget::AddChild(nsIWidget* aChild)
{
NS_PRECONDITION(!aChild->GetNextSibling() && !aChild->GetPrevSibling(),
"aChild not properly removed from its old child list");
if (!mFirstChild) {
mFirstChild = mLastChild = aChild;
} else {
// append to the list
NS_ASSERTION(mLastChild, "Bogus state");
NS_ASSERTION(!mLastChild->GetNextSibling(), "Bogus state");
mLastChild->SetNextSibling(aChild);
aChild->SetPrevSibling(mLastChild);
mLastChild = aChild;
}
}
//-------------------------------------------------------------------------
//
// Remove a child from the list of children
//
//-------------------------------------------------------------------------
void nsBaseWidget::RemoveChild(nsIWidget* aChild)
{
#ifdef DEBUG
#ifdef XP_MACOSX
// nsCocoaWindow doesn't implement GetParent, so in that case parent will be
// null and we'll just have to do without this assertion.
nsIWidget* parent = aChild->GetParent();
NS_ASSERTION(!parent || parent == this, "Not one of our kids!");
#else
NS_ASSERTION(aChild->GetParent() == this, "Not one of our kids!");
#endif
#endif
if (mLastChild == aChild) {
mLastChild = mLastChild->GetPrevSibling();
}
if (mFirstChild == aChild) {
mFirstChild = mFirstChild->GetNextSibling();
}
// Now remove from the list. Make sure that we pass ownership of the tail
// of the list correctly before we have aChild let go of it.
nsIWidget* prev = aChild->GetPrevSibling();
nsIWidget* next = aChild->GetNextSibling();
if (prev) {
prev->SetNextSibling(next);
}
if (next) {
next->SetPrevSibling(prev);
}
aChild->SetNextSibling(nullptr);
aChild->SetPrevSibling(nullptr);
}
//-------------------------------------------------------------------------
//
// Sets widget's position within its parent's child list.
//
//-------------------------------------------------------------------------
void nsBaseWidget::SetZIndex(int32_t aZIndex)
{
// Hold a ref to ourselves just in case, since we're going to remove
// from our parent.
nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
mZIndex = aZIndex;
// reorder this child in its parent's list.
nsBaseWidget* parent = static_cast<nsBaseWidget*>(GetParent());
if (parent) {
parent->RemoveChild(this);
// Scope sib outside the for loop so we can check it afterward
nsIWidget* sib = parent->GetFirstChild();
for ( ; sib; sib = sib->GetNextSibling()) {
int32_t childZIndex = GetZIndex();
if (aZIndex < childZIndex) {
// Insert ourselves before sib
nsIWidget* prev = sib->GetPrevSibling();
mNextSibling = sib;
mPrevSibling = prev;
sib->SetPrevSibling(this);
if (prev) {
prev->SetNextSibling(this);
} else {
NS_ASSERTION(sib == parent->mFirstChild, "Broken child list");
// We've taken ownership of sib, so it's safe to have parent let
// go of it
parent->mFirstChild = this;
}
PlaceBehind(eZPlacementBelow, sib, false);
break;
}
}
// were we added to the list?
if (!sib) {
parent->AddChild(this);
}
}
}
//-------------------------------------------------------------------------
//
// Places widget behind the given widget (platforms must override)
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsBaseWidget::PlaceBehind(nsTopLevelWidgetZPlacement aPlacement,
nsIWidget *aWidget, bool aActivate)
{
return NS_OK;
}
//-------------------------------------------------------------------------
//
// Maximize, minimize or restore the window. The BaseWidget implementation
// merely stores the state.
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsBaseWidget::SetSizeMode(int32_t aMode)
{
if (aMode == nsSizeMode_Normal ||
aMode == nsSizeMode_Minimized ||
aMode == nsSizeMode_Maximized ||
aMode == nsSizeMode_Fullscreen) {
mSizeMode = (nsSizeMode) aMode;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
//-------------------------------------------------------------------------
//
// Get this component cursor
//
//-------------------------------------------------------------------------
nsCursor nsBaseWidget::GetCursor()
{
return mCursor;
}
NS_METHOD nsBaseWidget::SetCursor(nsCursor aCursor)
{
mCursor = aCursor;
return NS_OK;
}
NS_IMETHODIMP nsBaseWidget::SetCursor(imgIContainer* aCursor,
uint32_t aHotspotX, uint32_t aHotspotY)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
//-------------------------------------------------------------------------
//
// Window transparency methods
//
//-------------------------------------------------------------------------
void nsBaseWidget::SetTransparencyMode(nsTransparencyMode aMode) {
}
nsTransparencyMode nsBaseWidget::GetTransparencyMode() {
return eTransparencyOpaque;
}
bool
nsBaseWidget::StoreWindowClipRegion(const nsTArray<nsIntRect>& aRects)
{
if (mClipRects && mClipRectCount == aRects.Length() &&
memcmp(mClipRects, aRects.Elements(), sizeof(nsIntRect)*mClipRectCount) == 0)
return false;
mClipRectCount = aRects.Length();
mClipRects = new nsIntRect[mClipRectCount];
if (mClipRects) {
memcpy(mClipRects, aRects.Elements(), sizeof(nsIntRect)*mClipRectCount);
}
return true;
}
void
nsBaseWidget::GetWindowClipRegion(nsTArray<nsIntRect>* aRects)
{
if (mClipRects) {
aRects->AppendElements(mClipRects.get(), mClipRectCount);
} else {
aRects->AppendElement(nsIntRect(0, 0, mBounds.width, mBounds.height));
}
}
//-------------------------------------------------------------------------
//
// Set window shadow style
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsBaseWidget::SetWindowShadowStyle(int32_t aMode)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
//-------------------------------------------------------------------------
//
// Hide window borders/decorations for this widget
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsBaseWidget::HideWindowChrome(bool aShouldHide)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
//-------------------------------------------------------------------------
//
// Put the window into full-screen mode
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsBaseWidget::MakeFullScreen(bool aFullScreen)
{
HideWindowChrome(aFullScreen);
if (aFullScreen) {
if (!mOriginalBounds)
mOriginalBounds = new nsIntRect();
GetScreenBounds(*mOriginalBounds);
// convert dev pix to display pix for window manipulation
CSSToLayoutDeviceScale scale = GetDefaultScale();
mOriginalBounds->x = NSToIntRound(mOriginalBounds->x / scale.scale);
mOriginalBounds->y = NSToIntRound(mOriginalBounds->y / scale.scale);
mOriginalBounds->width = NSToIntRound(mOriginalBounds->width / scale.scale);
mOriginalBounds->height = NSToIntRound(mOriginalBounds->height / scale.scale);
// Move to top-left corner of screen and size to the screen dimensions
nsCOMPtr<nsIScreenManager> screenManager;
screenManager = do_GetService("@mozilla.org/gfx/screenmanager;1");
NS_ASSERTION(screenManager, "Unable to grab screenManager.");
if (screenManager) {
nsCOMPtr<nsIScreen> screen;
screenManager->ScreenForRect(mOriginalBounds->x,
mOriginalBounds->y,
mOriginalBounds->width,
mOriginalBounds->height,
getter_AddRefs(screen));
if (screen) {
int32_t left, top, width, height;
if (NS_SUCCEEDED(screen->GetRectDisplayPix(&left, &top, &width, &height))) {
Resize(left, top, width, height, true);
}
}
}
} else if (mOriginalBounds) {
Resize(mOriginalBounds->x, mOriginalBounds->y, mOriginalBounds->width,
mOriginalBounds->height, true);
}
return NS_OK;
}
nsBaseWidget::AutoLayerManagerSetup::AutoLayerManagerSetup(
nsBaseWidget* aWidget, gfxContext* aTarget,
BufferMode aDoubleBuffering, ScreenRotation aRotation)
: mWidget(aWidget)
{
mLayerManager = static_cast<BasicLayerManager*>(mWidget->GetLayerManager());
if (mLayerManager) {
NS_ASSERTION(mLayerManager->GetBackendType() == LayersBackend::LAYERS_BASIC,
"AutoLayerManagerSetup instantiated for non-basic layer backend!");
mLayerManager->SetDefaultTarget(aTarget);
mLayerManager->SetDefaultTargetConfiguration(aDoubleBuffering, aRotation);
}
}
nsBaseWidget::AutoLayerManagerSetup::~AutoLayerManagerSetup()
{
if (mLayerManager) {
NS_ASSERTION(mLayerManager->GetBackendType() == LayersBackend::LAYERS_BASIC,
"AutoLayerManagerSetup instantiated for non-basic layer backend!");
mLayerManager->SetDefaultTarget(nullptr);
mLayerManager->SetDefaultTargetConfiguration(mozilla::layers::BufferMode::BUFFER_NONE, ROTATION_0);
}
}
nsBaseWidget::AutoUseBasicLayerManager::AutoUseBasicLayerManager(nsBaseWidget* aWidget)
: mWidget(aWidget)
{
mPreviousTemporarilyUseBasicLayerManager =
mWidget->mTemporarilyUseBasicLayerManager;
mWidget->mTemporarilyUseBasicLayerManager = true;
}
nsBaseWidget::AutoUseBasicLayerManager::~AutoUseBasicLayerManager()
{
mWidget->mTemporarilyUseBasicLayerManager =
mPreviousTemporarilyUseBasicLayerManager;
}
bool
nsBaseWidget::ComputeShouldAccelerate(bool aDefault)
{
#if defined(XP_WIN) || defined(ANDROID) || \
defined(MOZ_GL_PROVIDER) || defined(XP_MACOSX) || defined(MOZ_WIDGET_QT)
bool accelerateByDefault = true;
#else
bool accelerateByDefault = false;
#endif
#ifdef XP_MACOSX
// 10.6.2 and lower have a bug involving textures and pixel buffer objects
// that caused bug 629016, so we don't allow OpenGL-accelerated layers on
// those versions of the OS.
// This will still let full-screen video be accelerated on OpenGL, because
// that XUL widget opts in to acceleration, but that's probably OK.
accelerateByDefault = nsCocoaFeatures::AccelerateByDefault();
#endif
// we should use AddBoolPrefVarCache
bool disableAcceleration = gfxPrefs::LayersAccelerationDisabled();
mForceLayersAcceleration = gfxPrefs::LayersAccelerationForceEnabled();
const char *acceleratedEnv = PR_GetEnv("MOZ_ACCELERATED");
accelerateByDefault = accelerateByDefault ||
(acceleratedEnv && (*acceleratedEnv != '0'));
nsCOMPtr<nsIXULRuntime> xr = do_GetService("@mozilla.org/xre/runtime;1");
bool safeMode = false;
if (xr)
xr->GetInSafeMode(&safeMode);
bool whitelisted = false;
nsCOMPtr<nsIGfxInfo> gfxInfo = do_GetService("@mozilla.org/gfx/info;1");
if (gfxInfo) {
// bug 655578: on X11 at least, we must always call GetData (even if we don't need that information)
// as that's what causes GfxInfo initialization which kills the zombie 'glxtest' process.
// initially we relied on the fact that GetFeatureStatus calls GetData for us, but bug 681026 showed
// that assumption to be unsafe.
gfxInfo->GetData();
int32_t status;
if (NS_SUCCEEDED(gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_OPENGL_LAYERS, &status))) {
if (status == nsIGfxInfo::FEATURE_STATUS_OK) {
whitelisted = true;
}
}
}
if (disableAcceleration || safeMode)
return false;
if (mForceLayersAcceleration)
return true;
if (!whitelisted) {
static int tell_me_once = 0;
if (!tell_me_once) {
NS_WARNING("OpenGL-accelerated layers are not supported on this system");
tell_me_once = 1;
}
#ifdef MOZ_WIDGET_ANDROID
NS_RUNTIMEABORT("OpenGL-accelerated layers are a hard requirement on this platform. "
"Cannot continue without support for them");
#endif
return false;
}
if (accelerateByDefault)
return true;
/* use the window acceleration flag */
return aDefault;
}
CompositorParent* nsBaseWidget::NewCompositorParent(int aSurfaceWidth,
int aSurfaceHeight)
{
return new CompositorParent(this, false, aSurfaceWidth, aSurfaceHeight);
}
void nsBaseWidget::CreateCompositor()
{
nsIntRect rect;
GetBounds(rect);
CreateCompositor(rect.width, rect.height);
}
void
nsBaseWidget::GetPreferredCompositorBackends(nsTArray<LayersBackend>& aHints)
{
if (mUseLayersAcceleration) {
aHints.AppendElement(LayersBackend::LAYERS_OPENGL);
}
aHints.AppendElement(LayersBackend::LAYERS_BASIC);
}
void nsBaseWidget::CreateCompositor(int aWidth, int aHeight)
{
// This makes sure that gfxPlatforms gets initialized if it hasn't by now.
gfxPlatform::GetPlatform();
MOZ_ASSERT(gfxPlatform::UsesOffMainThreadCompositing(),
"This function assumes OMTC");
// Recreating this is tricky, as we may still have an old and we need
// to make sure it's properly destroyed by calling DestroyCompositor!
// If we've already received a shutdown notification, don't try
// create a new compositor.
if (!mShutdownObserver) {
return;
}
// Initialize LayerScope on the main thread.
LayerScope::Init();
mCompositorParent = NewCompositorParent(aWidth, aHeight);
MessageChannel *parentChannel = mCompositorParent->GetIPCChannel();
nsRefPtr<ClientLayerManager> lm = new ClientLayerManager(this);
MessageLoop *childMessageLoop = CompositorParent::CompositorLoop();
mCompositorChild = new CompositorChild(lm);
mCompositorChild->Open(parentChannel, childMessageLoop, ipc::ChildSide);
TextureFactoryIdentifier textureFactoryIdentifier;
PLayerTransactionChild* shadowManager = nullptr;
nsTArray<LayersBackend> backendHints;
GetPreferredCompositorBackends(backendHints);
#if !defined(MOZ_X11) && !defined(XP_WIN)
if (!mRequireOffMainThreadCompositing &&
!Preferences::GetBool("layers.offmainthreadcomposition.force-basic", false)) {
for (size_t i = 0; i < backendHints.Length(); ++i) {
if (backendHints[i] == LayersBackend::LAYERS_BASIC) {
backendHints[i] = LayersBackend::LAYERS_NONE;
}
}
}
#endif
bool success = false;
if (!backendHints.IsEmpty()) {
shadowManager = mCompositorChild->SendPLayerTransactionConstructor(
backendHints, 0, &textureFactoryIdentifier, &success);
}
if (success) {
ShadowLayerForwarder* lf = lm->AsShadowForwarder();
if (!lf) {
lm = nullptr;
mCompositorChild = nullptr;
return;
}
lf->SetShadowManager(shadowManager);
lf->IdentifyTextureHost(textureFactoryIdentifier);
ImageBridgeChild::IdentifyCompositorTextureHost(textureFactoryIdentifier);
WindowUsesOMTC();
mLayerManager = lm.forget();
return;
}
NS_WARNING("Failed to create an OMT compositor.");
DestroyCompositor();
// Compositor child had the only reference to LayerManager and will have
// deallocated it when being freed.
}
bool nsBaseWidget::ShouldUseOffMainThreadCompositing()
{
return gfxPlatform::UsesOffMainThreadCompositing();
}
LayerManager* nsBaseWidget::GetLayerManager(PLayerTransactionChild* aShadowManager,
LayersBackend aBackendHint,
LayerManagerPersistence aPersistence,
bool* aAllowRetaining)
{
if (!mLayerManager) {
mUseLayersAcceleration = ComputeShouldAccelerate(mUseLayersAcceleration);
// Try to use an async compositor first, if possible
if (ShouldUseOffMainThreadCompositing()) {
// e10s uses the parameter to pass in the shadow manager from the TabChild
// so we don't expect to see it there since this doesn't support e10s.
NS_ASSERTION(aShadowManager == nullptr, "Async Compositor not supported with e10s");
CreateCompositor();
}
if (!mLayerManager) {
mLayerManager = CreateBasicLayerManager();
}
}
if (mTemporarilyUseBasicLayerManager && !mBasicLayerManager) {
mBasicLayerManager = CreateBasicLayerManager();
}
LayerManager* usedLayerManager = mTemporarilyUseBasicLayerManager ?
mBasicLayerManager : mLayerManager;
if (aAllowRetaining) {
*aAllowRetaining = (usedLayerManager == mLayerManager);
}
return usedLayerManager;
}
LayerManager* nsBaseWidget::CreateBasicLayerManager()
{
return new BasicLayerManager(this);
}
CompositorChild* nsBaseWidget::GetRemoteRenderer()
{
return mCompositorChild;
}
TemporaryRef<mozilla::gfx::DrawTarget> nsBaseWidget::StartRemoteDrawing()
{
return nullptr;
}
//-------------------------------------------------------------------------
//
// Return the used device context
//
//-------------------------------------------------------------------------
nsDeviceContext* nsBaseWidget::GetDeviceContext()
{
if (!mContextInitialized) {