already_AddRefed<gfx::DrawTarget>
CompositorWidgetProxy::CreateBackBufferDrawTarget(gfx::DrawTarget* aScreenTarget,
const LayoutDeviceIntRect& aRect,
const LayoutDeviceIntRect& aClearRect)
{
MOZ_ASSERT(aScreenTarget);
gfx::SurfaceFormat format = gfx::SurfaceFormat::B8G8R8A8;
gfx::IntSize size = aRect.ToUnknownRect().Size();
gfx::IntSize clientSize(GetClientSize().ToUnknownSize());
RefPtr<gfx::DrawTarget> target;
// Re-use back buffer if possible
if (mLastBackBuffer &&
mLastBackBuffer->GetBackendType() == aScreenTarget->GetBackendType() &&
mLastBackBuffer->GetFormat() == format &&
size <= mLastBackBuffer->GetSize() &&
mLastBackBuffer->GetSize() <= clientSize) {
target = mLastBackBuffer;
target->SetTransform(gfx::Matrix());
if (!aClearRect.IsEmpty()) {
gfx::IntRect clearRect = aClearRect.ToUnknownRect() - aRect.ToUnknownRect().TopLeft();
target->ClearRect(gfx::Rect(clearRect.x, clearRect.y, clearRect.width, clearRect.height));
}
} else {
target = aScreenTarget->CreateSimilarDrawTarget(size, format);
mLastBackBuffer = target;
}
return target.forget();
}
void
ClientLayerManager::MakeSnapshotIfRequired()
{
if (!mShadowTarget) {
return;
}
if (mWidget) {
if (CompositorBridgeChild* remoteRenderer = GetRemoteRenderer()) {
// The compositor doesn't draw to a different sized surface
// when there's a rotation. Instead we rotate the result
// when drawing into dt
LayoutDeviceIntRect outerBounds;
mWidget->GetBounds(outerBounds);
IntRect bounds = ToOutsideIntRect(mShadowTarget->GetClipExtents());
if (mTargetRotation) {
bounds =
RotateRect(bounds, outerBounds.ToUnknownRect(), mTargetRotation);
}
SurfaceDescriptor inSnapshot;
if (!bounds.IsEmpty() &&
mForwarder->AllocSurfaceDescriptor(bounds.Size(),
gfxContentType::COLOR_ALPHA,
&inSnapshot)) {
// Make a copy of |inSnapshot| because the call to send it over IPC
// will call forget() on the Shmem inside, and zero it out.
SurfaceDescriptor outSnapshot = inSnapshot;
if (remoteRenderer->SendMakeSnapshot(inSnapshot, bounds)) {
RefPtr<DataSourceSurface> surf = GetSurfaceForDescriptor(outSnapshot);
DrawTarget* dt = mShadowTarget->GetDrawTarget();
Rect dstRect(bounds.x, bounds.y, bounds.width, bounds.height);
Rect srcRect(0, 0, bounds.width, bounds.height);
gfx::Matrix rotate =
ComputeTransformForUnRotation(outerBounds.ToUnknownRect(),
mTargetRotation);
gfx::Matrix oldMatrix = dt->GetTransform();
dt->SetTransform(rotate * oldMatrix);
dt->DrawSurface(surf, dstRect, srcRect,
DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_OVER));
dt->SetTransform(oldMatrix);
}
mForwarder->DestroySurfaceDescriptor(&outSnapshot);
}
}
}
mShadowTarget = nullptr;
}
nsresult
nsResizerFrame::HandleEvent(nsPresContext* aPresContext,
WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
NS_ENSURE_ARG_POINTER(aEventStatus);
if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
return NS_OK;
}
nsWeakFrame weakFrame(this);
bool doDefault = true;
switch (aEvent->mMessage) {
case eTouchStart:
case eMouseDown: {
if (aEvent->mClass == eTouchEventClass ||
(aEvent->mClass == eMouseEventClass &&
aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton)) {
nsCOMPtr<nsIBaseWindow> window;
nsIPresShell* presShell = aPresContext->GetPresShell();
nsIContent* contentToResize =
GetContentToResize(presShell, getter_AddRefs(window));
if (contentToResize) {
nsIFrame* frameToResize = contentToResize->GetPrimaryFrame();
if (!frameToResize)
break;
// cache the content rectangle for the frame to resize
// GetScreenRectInAppUnits returns the border box rectangle, so
// adjust to get the desired content rectangle.
nsRect rect = frameToResize->GetScreenRectInAppUnits();
switch (frameToResize->StylePosition()->mBoxSizing) {
case StyleBoxSizing::Content:
rect.Deflate(frameToResize->GetUsedPadding());
MOZ_FALLTHROUGH;
case StyleBoxSizing::Padding:
rect.Deflate(frameToResize->GetUsedBorder());
MOZ_FALLTHROUGH;
case StyleBoxSizing::Border:
// nothing
break;
}
mMouseDownRect =
LayoutDeviceIntRect::FromAppUnitsToNearest(rect, aPresContext->AppUnitsPerDevPixel());
doDefault = false;
}
else {
// If there is no window, then resizing isn't allowed.
if (!window)
break;
doDefault = false;
// ask the widget implementation to begin a resize drag if it can
Direction direction = GetDirection();
nsresult rv = aEvent->mWidget->BeginResizeDrag(aEvent,
direction.mHorizontal, direction.mVertical);
// for native drags, don't set the fields below
if (rv != NS_ERROR_NOT_IMPLEMENTED)
break;
// if there's no native resize support, we need to do window
// resizing ourselves
window->GetPositionAndSize(&mMouseDownRect.x, &mMouseDownRect.y,
&mMouseDownRect.width, &mMouseDownRect.height);
}
// remember current mouse coordinates
LayoutDeviceIntPoint refPoint;
if (!GetEventPoint(aEvent, refPoint))
return NS_OK;
mMouseDownPoint = refPoint + aEvent->mWidget->WidgetToScreenOffset();
// we're tracking
mTrackingMouseMove = true;
nsIPresShell::SetCapturingContent(GetContent(), CAPTURE_IGNOREALLOWED);
}
}
break;
case eTouchEnd:
case eMouseUp: {
if (aEvent->mClass == eTouchEventClass ||
(aEvent->mClass == eMouseEventClass &&
aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton)) {
// we're done tracking.
mTrackingMouseMove = false;
nsIPresShell::SetCapturingContent(nullptr, 0);
doDefault = false;
}
}
break;
case eTouchMove:
case eMouseMove: {
if (mTrackingMouseMove)
{
nsCOMPtr<nsIBaseWindow> window;
nsIPresShell* presShell = aPresContext->GetPresShell();
nsCOMPtr<nsIContent> contentToResize =
GetContentToResize(presShell, getter_AddRefs(window));
// check if the returned content really is a menupopup
nsMenuPopupFrame* menuPopupFrame = nullptr;
if (contentToResize) {
menuPopupFrame = do_QueryFrame(contentToResize->GetPrimaryFrame());
}
// both MouseMove and direction are negative when pointing to the
// top and left, and positive when pointing to the bottom and right
// retrieve the offset of the mousemove event relative to the mousedown.
// The difference is how much the resize needs to be
LayoutDeviceIntPoint refPoint;
if (!GetEventPoint(aEvent, refPoint))
return NS_OK;
LayoutDeviceIntPoint screenPoint =
refPoint + aEvent->mWidget->WidgetToScreenOffset();
LayoutDeviceIntPoint mouseMove(screenPoint - mMouseDownPoint);
// Determine which direction to resize by checking the dir attribute.
// For windows and menus, ensure that it can be resized in that direction.
Direction direction = GetDirection();
if (window || menuPopupFrame) {
if (menuPopupFrame) {
menuPopupFrame->CanAdjustEdges(
(direction.mHorizontal == -1) ? NS_SIDE_LEFT : NS_SIDE_RIGHT,
(direction.mVertical == -1) ? NS_SIDE_TOP : NS_SIDE_BOTTOM, mouseMove);
}
}
else if (!contentToResize) {
break; // don't do anything if there's nothing to resize
}
LayoutDeviceIntRect rect = mMouseDownRect;
// Check if there are any size constraints on this window.
widget::SizeConstraints sizeConstraints;
if (window) {
nsCOMPtr<nsIWidget> widget;
window->GetMainWidget(getter_AddRefs(widget));
sizeConstraints = widget->GetSizeConstraints();
}
AdjustDimensions(&rect.x, &rect.width, sizeConstraints.mMinSize.width,
sizeConstraints.mMaxSize.width, mouseMove.x, direction.mHorizontal);
AdjustDimensions(&rect.y, &rect.height, sizeConstraints.mMinSize.height,
sizeConstraints.mMaxSize.height, mouseMove.y, direction.mVertical);
// Don't allow resizing a window or a popup past the edge of the screen,
// so adjust the rectangle to fit within the available screen area.
if (window) {
nsCOMPtr<nsIScreen> screen;
nsCOMPtr<nsIScreenManager> sm(do_GetService("@mozilla.org/gfx/screenmanager;1"));
if (sm) {
nsIntRect frameRect = GetScreenRect();
// ScreenForRect requires display pixels, so scale from device pix
double scale;
window->GetUnscaledDevicePixelsPerCSSPixel(&scale);
sm->ScreenForRect(NSToIntRound(frameRect.x / scale),
NSToIntRound(frameRect.y / scale), 1, 1,
getter_AddRefs(screen));
if (screen) {
LayoutDeviceIntRect screenRect;
screen->GetRect(&screenRect.x, &screenRect.y,
&screenRect.width, &screenRect.height);
rect.IntersectRect(rect, screenRect);
}
}
}
else if (menuPopupFrame) {
nsRect frameRect = menuPopupFrame->GetScreenRectInAppUnits();
nsIFrame* rootFrame = aPresContext->PresShell()->FrameManager()->GetRootFrame();
nsRect rootScreenRect = rootFrame->GetScreenRectInAppUnits();
nsPopupLevel popupLevel = menuPopupFrame->PopupLevel();
int32_t appPerDev = aPresContext->AppUnitsPerDevPixel();
LayoutDeviceIntRect screenRect = menuPopupFrame->GetConstraintRect
(LayoutDeviceIntRect::FromAppUnitsToNearest(frameRect, appPerDev),
// round using ...ToInside as it's better to be a pixel too small
// than be too large. If the popup is too large it could get flipped
// to the opposite side of the anchor point while resizing.
LayoutDeviceIntRect::FromAppUnitsToInside(rootScreenRect, appPerDev),
popupLevel);
rect.IntersectRect(rect, screenRect);
}
if (contentToResize) {
// convert the rectangle into css pixels. When changing the size in a
// direction, don't allow the new size to be less that the resizer's
// size. This ensures that content isn't resized too small as to make
// the resizer invisible.
nsRect appUnitsRect = ToAppUnits(rect.ToUnknownRect(), aPresContext->AppUnitsPerDevPixel());
if (appUnitsRect.width < mRect.width && mouseMove.x)
appUnitsRect.width = mRect.width;
if (appUnitsRect.height < mRect.height && mouseMove.y)
appUnitsRect.height = mRect.height;
nsIntRect cssRect = appUnitsRect.ToInsidePixels(nsPresContext::AppUnitsPerCSSPixel());
LayoutDeviceIntRect oldRect;
nsWeakFrame weakFrame(menuPopupFrame);
if (menuPopupFrame) {
nsCOMPtr<nsIWidget> widget = menuPopupFrame->GetWidget();
if (widget)
widget->GetScreenBounds(oldRect);
// convert the new rectangle into outer window coordinates
LayoutDeviceIntPoint clientOffset = widget->GetClientOffset();
rect.x -= clientOffset.x;
rect.y -= clientOffset.y;
}
SizeInfo sizeInfo, originalSizeInfo;
sizeInfo.width.AppendInt(cssRect.width);
sizeInfo.height.AppendInt(cssRect.height);
ResizeContent(contentToResize, direction, sizeInfo, &originalSizeInfo);
MaybePersistOriginalSize(contentToResize, originalSizeInfo);
// Move the popup to the new location unless it is anchored, since
// the position shouldn't change. nsMenuPopupFrame::SetPopupPosition
// will instead ensure that the popup's position is anchored at the
// right place.
if (weakFrame.IsAlive() &&
(oldRect.x != rect.x || oldRect.y != rect.y) &&
(!menuPopupFrame->IsAnchored() ||
menuPopupFrame->PopupLevel() != ePopupLevelParent)) {
CSSPoint cssPos = rect.TopLeft() / aPresContext->CSSToDevPixelScale();
menuPopupFrame->MoveTo(RoundedToInt(cssPos), true);
}
}
else {
window->SetPositionAndSize(rect.x, rect.y, rect.width, rect.height, true); // do the repaint.
}
doDefault = false;
}
}
break;
case eMouseClick: {
WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
if (mouseEvent->IsLeftClickEvent()) {
MouseClicked(mouseEvent);
}
break;
}
case eMouseDoubleClick:
if (aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) {
nsCOMPtr<nsIBaseWindow> window;
nsIPresShell* presShell = aPresContext->GetPresShell();
nsIContent* contentToResize =
GetContentToResize(presShell, getter_AddRefs(window));
if (contentToResize) {
nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(contentToResize->GetPrimaryFrame());
if (menuPopupFrame)
break; // Don't restore original sizing for menupopup frames until
// we handle screen constraints here. (Bug 357725)
RestoreOriginalSize(contentToResize);
}
}
break;
default:
break;
}
if (!doDefault)
*aEventStatus = nsEventStatus_eConsumeNoDefault;
if (doDefault && weakFrame.IsAlive())
return nsTitleBarFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
return NS_OK;
}
void
ClientLayerManager::BeginTransactionWithTarget(gfxContext* aTarget)
{
mInTransaction = true;
mTransactionStart = TimeStamp::Now();
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG(("[----- BeginTransaction"));
Log();
#endif
NS_ASSERTION(!InTransaction(), "Nested transactions not allowed");
mPhase = PHASE_CONSTRUCTION;
MOZ_ASSERT(mKeepAlive.IsEmpty(), "uncommitted txn?");
RefPtr<gfxContext> targetContext = aTarget;
// If the last transaction was incomplete (a failed DoEmptyTransaction),
// don't signal a new transaction to ShadowLayerForwarder. Carry on adding
// to the previous transaction.
dom::ScreenOrientationInternal orientation;
if (dom::TabChild* window = mWidget->GetOwningTabChild()) {
orientation = window->GetOrientation();
} else {
hal::ScreenConfiguration currentConfig;
hal::GetCurrentScreenConfiguration(¤tConfig);
orientation = currentConfig.orientation();
}
LayoutDeviceIntRect targetBounds = mWidget->GetNaturalBounds();
targetBounds.x = targetBounds.y = 0;
mForwarder->BeginTransaction(targetBounds.ToUnknownRect(), mTargetRotation,
orientation);
// If we're drawing on behalf of a context with async pan/zoom
// enabled, then the entire buffer of painted layers might be
// composited (including resampling) asynchronously before we get
// a chance to repaint, so we have to ensure that it's all valid
// and not rotated.
//
// Desktop does not support async zoom yet, so we ignore this for those
// platforms.
#if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WIDGET_GONK) || defined(MOZ_WIDGET_UIKIT)
if (mWidget && mWidget->GetOwningTabChild()) {
mCompositorMightResample = AsyncPanZoomEnabled();
}
#endif
// If we have a non-default target, we need to let our shadow manager draw
// to it. This will happen at the end of the transaction.
if (aTarget && XRE_IsParentProcess()) {
mShadowTarget = aTarget;
} else {
NS_ASSERTION(!aTarget,
"Content-process ClientLayerManager::BeginTransactionWithTarget not supported");
}
// If this is a new paint, increment the paint sequence number.
if (!mIsRepeatTransaction) {
// Increment the paint sequence number even if test logging isn't
// enabled in this process; it may be enabled in the parent process,
// and the parent process expects unique sequence numbers.
++mPaintSequenceNumber;
if (gfxPrefs::APZTestLoggingEnabled()) {
mApzTestData.StartNewPaint(mPaintSequenceNumber);
}
}
}
bool
ClientLayerManager::BeginTransactionWithTarget(gfxContext* aTarget)
{
// Wait for any previous async paints to complete before starting to paint again.
GetCompositorBridgeChild()->FlushAsyncPaints();
MOZ_ASSERT(mForwarder, "ClientLayerManager::BeginTransaction without forwarder");
if (!mForwarder->IPCOpen()) {
gfxCriticalNote << "ClientLayerManager::BeginTransaction with IPC channel down. GPU process may have died.";
return false;
}
if (XRE_IsContentProcess() &&
mForwarder->DeviceCanReset() &&
mDeviceResetSequenceNumber != CompositorBridgeChild::Get()->DeviceResetSequenceNumber())
{
// The compositor has informed this process that a device reset occurred,
// but it has not finished informing each TabChild of its new
// TextureFactoryIdentifier. Until then, it's illegal to paint. Note that
// it is also illegal to request a new TIF synchronously, because we're
// not guaranteed the UI process has finished acquiring new compositors
// for each widget.
//
// Note that we only do this for accelerated backends, since we do not
// perform resets on basic compositors.
gfxCriticalNote << "Discarding a paint since a device reset has not yet been acknowledged.";
return false;
}
mInTransaction = true;
mTransactionStart = TimeStamp::Now();
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG(("[----- BeginTransaction"));
Log();
#endif
NS_ASSERTION(!InTransaction(), "Nested transactions not allowed");
mPhase = PHASE_CONSTRUCTION;
MOZ_ASSERT(mKeepAlive.IsEmpty(), "uncommitted txn?");
// If the last transaction was incomplete (a failed DoEmptyTransaction),
// don't signal a new transaction to ShadowLayerForwarder. Carry on adding
// to the previous transaction.
dom::ScreenOrientationInternal orientation;
if (dom::TabChild* window = mWidget->GetOwningTabChild()) {
orientation = window->GetOrientation();
} else {
hal::ScreenConfiguration currentConfig;
hal::GetCurrentScreenConfiguration(¤tConfig);
orientation = currentConfig.orientation();
}
LayoutDeviceIntRect targetBounds = mWidget->GetNaturalBounds();
targetBounds.x = targetBounds.y = 0;
mForwarder->BeginTransaction(targetBounds.ToUnknownRect(), mTargetRotation,
orientation);
// If we're drawing on behalf of a context with async pan/zoom
// enabled, then the entire buffer of painted layers might be
// composited (including resampling) asynchronously before we get
// a chance to repaint, so we have to ensure that it's all valid
// and not rotated.
//
// Desktop does not support async zoom yet, so we ignore this for those
// platforms.
#if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WIDGET_UIKIT)
if (mWidget && mWidget->GetOwningTabChild()) {
mCompositorMightResample = AsyncPanZoomEnabled();
}
#endif
// If we have a non-default target, we need to let our shadow manager draw
// to it. This will happen at the end of the transaction.
if (aTarget && XRE_IsParentProcess()) {
mShadowTarget = aTarget;
} else {
NS_ASSERTION(!aTarget,
"Content-process ClientLayerManager::BeginTransactionWithTarget not supported");
}
// If this is a new paint, increment the paint sequence number.
if (!mIsRepeatTransaction) {
// Increment the paint sequence number even if test logging isn't
// enabled in this process; it may be enabled in the parent process,
// and the parent process expects unique sequence numbers.
++mPaintSequenceNumber;
if (gfxPrefs::APZTestLoggingEnabled()) {
mApzTestData.StartNewPaint(mPaintSequenceNumber);
}
}
return true;
}
