Same approach as the other bug, mostly replacing automatically by removing
'using mozilla::Forward;' and then:
s/mozilla::Forward/std::forward/
s/Forward</std::forward</
The only file that required manual fixup was TestTreeTraversal.cpp, which had
a class called TestNodeForward with template parameters :)
MozReview-Commit-ID: A88qFG5AccP
This was done automatically replacing:
s/mozilla::Move/std::move/
s/ Move(/ std::move(/
s/(Move(/(std::move(/
Removing the 'using mozilla::Move;' lines.
And then with a few manual fixups, see the bug for the split series..
MozReview-Commit-ID: Jxze3adipUh
We can easily use Maybe<DataSourceSurface::ScopedMap> instead of
allocated the map on the heap. This does require some minor changes to
ScopedMap to properly support moves, but should be much more efficient.
DrawableSurface only exposes DrawableFrameRef to its users. This is
sufficient for the drawing related code in general, but FrameAnimator
really needs RawAccessFrameRef to the underlying pixel data (which may
be paletted). While one can get a RawAccessFrameRef from a
DrawableFrameRef, it requires yet another lock of the imgFrame's mutex.
We can avoid this extra lock if we just allow the callers to get the
right data type in the first place.
Regardless of the size of an encoded image, SourceBuffer::Compact would
try to consolidate all of the chunks into a single chunk. If an image is
quite large, it can be actively harmful to do this, because we want a
very large contiguous chunk of memory for no real reason, and spend
extra time on the main thread doing the memcpy/consolidation.
Instead we now cap out the chunk size at 20MB. If we start allocating
chunks of this size, we will not perform compacting when we have
received all of the data. (Save for realloc'ing the last chunk since it
probably isn't full.)
On a related note, if we hit an out-of-memory condition in the middle of
appending data to the SourceBuffer, we would swallow the error. This is
because nsIInputStream::ReadSegments will succeed if any data was
written. This leaves the SourceBuffer out of sync. We now propogate this
error up properly to the higher levels.
fixup
Most cases where the pointer is stored into an already-declared variable can
trivially be changed to MakeNotNull<T*>, as the NotNull raw pointer will end
up in a smart pointer.
In RAII cases, the target type can be specified (e.g.:
`MakeNotNull<RefPtr<imgFrame>>)`), in which case the variable type may just be
`auto`, similar to the common use of MakeUnique.
Except when the target type is a base pointer, in which case it must be
specified in the declaration.
MozReview-Commit-ID: BYaSsvMhiDi
--HG--
extra : rebase_source : 8fe6f2aeaff5f515b7af2276c439004fa3a1f3ab
A default constructed SurfacePipe contains a NullSurfaceSink as its
filter in mHead. This filter does nothing and is merely a placeholder.
Since most SurfacePipe objects are constructed with the default
constructor, and NullSurfaceSink has no (modified) state, we use a
singleton to represent it. Normally the SurfacePipe owns its filter, so
it needs to do a special check for NullSurfaceSink to ensure it doesn't
free it explicitly.
A Decoder object contains a default constructed SurfacePipe until it
needs to create the first frame from an image. This is a very brief
window because it does not take very long or much data to get to this
stage of decoding.
The NullSurfaceSink singleton is freed upon shutdown, however some
ISurfaceProvider objects may be lingering after this. If their Decoder
has yet to create the first frame, that means the SurfacePipe actually
contains a dangling pointer to the already freed singleton. To make
things worse, it actually tried to free the filter because it didn't
match the singleton (it got freed!).
As such, this change removes NullSurfaceSink entirely. We never use the
SurfacePipe before initializing it with a proper filter, and it would be
considered a programming error to do so. Instead let SurfacePipe::mHead
be null, and assert that it is not null when any operations are
performed on the SurfacePipe.
Currently SourceBuffer::ExpectLength will allocate a buffer which is a
multiple of MIN_CHUNK_CAPACITY (4096) bytes, no matter what the expected
size is. While it is true that HTTP servers can lie, and that we need to
handle that for legacy purposes, it is more likely the HTTP servers are
telling the truth when it comes to the content length. Additionally
images sourced from other locations, such as the file system or data
URIs, are always going to have the correct size information (barring a
bug elsewhere in the file system or our code). We should be able to
trust the size given as a good first guess.
While overallocating in general is a waste of memory,
SourceBuffer::Compact causes a far worse problem. After we have written
all of the data, and there are no active readers, we attempt to shrink
the allocated buffer(s) into a single contiguous chunk of the exact
length that we need (e.g. N allocations to 1, or 1 oversized allocation
to 1 perfect). Since we almost always overallocate, that means we almost
always trigger the logic in SourceBuffer::Compact to reallocate the data
into a properly sized buffer. If we had simply trusted the expected size
in the first place, we could have avoided this situation for the
majority of images.
In the case that we really do get the wrong size, then we will allocate
additional chunks which are multiples of MIN_CHUNK_CAPACITY bytes to fit
the data. At most, this will increase the number of discrete allocations
by 1, and trigger SourceBuffer::Compact to consolidate at the end. Since
we are almost always doing that before, and now we rarely do, this is a
significant win.
Thus far gtests have only tested fairly simple images which already
render the same on all platforms (e.g. solid green 100x100 square).
If we want to test more complicated images consistently across
platforms, we need to ensure the color adjustments we perform are
also consistent. Using the pref gfx.color_management.force_srgb to
force an sRGB CMS profile makes us consistent with the reftests and
mochitests.
However an additional quirk of the gtests is that we own the main
thread and we never check our event queue to see if anything is
pending. Depending on the initialization order of our graphics
dependencies, it may or may not have created pending runnables to
process the pref change. As such, we need to change the pref,
initialize imagelib/gfx and then check for, and if present execute,
any necessary runnables. Only then can we be sure that our desired
CMS profile is applied.
Emilio Cobos Álvarez
Andrew Osmond
Miko Mynttinen
arthur.iakab
Cosmin Sabou
Milan Sreckovic
Sylvestre Ledru
Jonathan Watt
David Anderson
Gerald Squelart
Andrea Marchesini
Sebastian Hengst
Bill McCloskey
Carsten "Tomcat" Book