In MultiTiledContentClient we can create a DrawTargetTiled with a
different origin than the layer we are painting. We must therefore
ensure when edge-padding that we provide the valid region in the draw
target's device-space rather than layer-space. Not doing so was
causing us to pad out in incorrect directions, causing visible seams.
Differential Revision: https://phabricator.services.mozilla.com/D3993
--HG--
extra : moz-landing-system : lando
This patch was generated using a simple sed script:
sed -i 's/ToUnknownRegion().GetBounds()/GetBounds().ToUnknownRect()/g' gfx/**/*.cpp gfx/**/*.h
Differential Revision: https://phabricator.services.mozilla.com/D3875
--HG--
extra : rebase_source : 4e9e7c9f2fb4ca60122712dd06632147cdec7195
When the namespace changes (e.g. due to a tab move between windows), we
may get stale transaction requests that we need to ignore. In
WebRenderBridgeParent::RecvSetDisplayList, we would automatically send
any unsent transaction data when exiting the method, but this did not
take into account the staleness. This patch ensures we only flush the
data if we actually want it.
The transaction in question that was observed and causing crashes was
UpdateImageBuffer.
Also speed up compositing videos as there's no longer need to check every single frames twice to determine if they were composited or not.
Differential Revision: https://phabricator.services.mozilla.com/D2178
We report the number of frames dropped by the compositor because they were too late through:
ImageComposite -> ImageHost -> CompositableTransactionParent -> ImageBridgeParent -> IPDL -> ImageBridgeChild -> ImageContainerListener -> ImageContainer -> VideoSink
Differential Revision: https://phabricator.services.mozilla.com/D2177
We can't rely on the FrameID continuity to determine if a frame has been dropped due to timing or not.
The reason being that the VideoSink will not send to the compositor frames it knows as being late already (causing a discontinuity in the frames IDs), and count them as being dropped.
If we were to look at discontinuity on the compositor we would account for those frames twice.
FramesID will also increase non-linearly if a frame isn't painted because it's not visible (either out of the visible tree or in a hidden tab).
What we can measure however, is when a frame should have been painted but didn't because it was too late by looking at the value returned by ImageComposite::ChooseImageIndex() or when a new set of images is being received by the ImageComposite.
Any images found in the earlier array but never returned must have been dropped due to timing.
Looking at the index continuity greatly simplify the logic as we no longer need to worry if a video is hidden or not, or be part of a layer that is itself hidden as neither SetImages will be called then, nor ChooseImage
For now, we only account for those frames dropped, and do not report them yet.
Differential Revision: https://phabricator.services.mozilla.com/D2176
We will use the characteristic of which TimedImage is returned to keep track on how many frames were dropped because they were too old. As such, we must make sure the retrieval of the current image is serialised.
This allows to reduce duplicated code between WebRenderImageHost and ImageHost classes.
Additionally, make RenderInfo::img member const as really, we never want to modify that one.
A future change will enforce that RenderInfo.img never survives longer than the ChooseImage()'s caller to clarify the lifetime of the TimedImage.
Differential Revision: https://phabricator.services.mozilla.com/D2175
In bug 1482415 a special check was added for the case where we fail to allocate
a buffer and started an async task. This papered over one crash for another
as ClientPaintedLayer also assumes that if there is an async task there is
a capture. It'd be best to just null out mAsyncTask and keep those checks
as is.
Differential Revision: https://phabricator.services.mozilla.com/D3520
--HG--
extra : rebase_source : 8cb2458f0a98795a6ece90b38a9c194c863bbd84
This function uses a nsAutoString internally, and its caller stores its
returned value in a nsAutoString. So it's silly for us to have it return a
different type (nsString). With this change, the compiler should be able to
perform return value optimization and avoid the need for any
copying/reallocation of this function's return value.
Differential Revision: https://phabricator.services.mozilla.com/D3926
--HG--
extra : moz-landing-system : lando
This results in fixed position elements being attached to the layout viewport
when being async-scrolled by APZ (when the layout viewport is larger than the
visual viewport).
MozReview-Commit-ID: 2YYIDnTWgVn
--HG--
extra : rebase_source : 58b77b2e9c8ed35bdc2d24dd8ca9494e8d23a391
Includes a new RAII class: AutoApplyAsyncTestAttributes, which, for the
duration of its lifetime, applies mTestAsyncScrollOffset and mTestAsyncZoom to
the APZC's FrameMetrics. We need this to ensure that the
AsyncPanZoomController::GetCurrentAsync* methods consider test scroll and zoom
attributes when doing their respective computations.
MozReview-Commit-ID: 9owJcdIegNH
--HG--
extra : rebase_source : 35273faf10b8db13e3b5485278262f93d4adc579
These method names and ordering have gotten out of sync because of
the recent churn.
Differential Revision: https://phabricator.services.mozilla.com/D3288
--HG--
extra : rebase_source : 42bceaeb66a0df4808981b8c9cb0ed70b23f5a30
extra : histedit_source : 228024efe8de4e149f7e7ca66a2bb078bba820ce
This may have been needed at some point, but all the important code for
EndLayerTransaction is in CompositorBridgeChild behind a lock, so this
should be safe.
--HG--
extra : rebase_source : bda4080bc04afa95954732050df7bd25c8177752
extra : histedit_source : 9386583dd923bf0ae44ff783d3ef1c6692944c77
There should only ever be at most four TextureClients here, so
allocated a vector seems wasteful.
--HG--
extra : rebase_source : 6b0f9f7749461eb39cd3c6c6bf7917152ffc9aab
extra : histedit_source : b5539d02c294596a5147dc55b417ef7970f8c0cd
This was needed when there were multiple types of CapturedPaintStates but
is not anymore.
--HG--
extra : rebase_source : 3648edccca7c73e3e3aa7a5c3e0d48d12d6324c5
extra : histedit_source : 021814c10b6578970c3a6d234c1e6641ad26b095
Correctness improvements:
* UTF errors are handled safely per spec instead of dangerously truncating
strings.
* There are fewer converter implementations.
Performance improvements:
* The old code did exact buffer length math, which meant doing UTF math twice
on each input string (once for length calculation and another time for
conversion). Exact length math is more complicated when handling errors
properly, which the old code didn't do. The new code does UTF math on the
string content only once (when converting) but risks allocating more than
once. There are heuristics in place to lower the probability of
reallocation in cases where the double math avoidance isn't enough of a
saving to absorb an allocation and memcpy.
* Previously, in UTF-16 <-> UTF-8 conversions, an ASCII prefix was optimized
but a single non-ASCII code point pessimized the rest of the string. The
new code tries to get back on the fast ASCII path.
* UTF-16 to Latin1 conversion guarantees less about handling of out-of-range
input to eliminate an operation from the inner loop on x86/x86_64.
* When assigning to a pre-existing string, the new code tries to reuse the
old buffer instead of first releasing the old buffer and then allocating a
new one.
* When reallocating from the new code, the memcpy covers only the data that
is part of the logical length of the old string instead of memcpying the
whole capacity. (For old callers old excess memcpy behavior is preserved
due to bogus callers. See bug 1472113.)
* UTF-8 strings in XPConnect that are in the Latin1 range are passed to
SpiderMonkey as Latin1.
New features:
* Conversion between UTF-8 and Latin1 is added in order to enable faster
future interop between Rust code (or otherwise UTF-8-using code) and text
node and SpiderMonkey code that uses Latin1.
MozReview-Commit-ID: JaJuExfILM9
Multiple tabs in the same process could be viewing the same image. If it
is an image we are taking some time to download from the network, it may
not be displayed all at once. As a result, it could generate several
dirty rects for the newly decoded lines each time we paint. Since we
only apply the dirty rect to the active tab, and forget it afterwards,
then when one returns to the other tab(s), it may not reupload all of
the modified image data. Now we save the dirty rect and accumulate it
for the handles which weren't able to be updated immediately.
This replaces WebRender's use of DrawTargetTiled which was just trying to
apply offset.
Differential Revision: https://phabricator.services.mozilla.com/D2906
--HG--
extra : moz-landing-system : lando
This lets us avoid filtering the entire source image when we only need a small portion of it.
This makes a big performance difference with tiled blob images with WebRender.
MozReview-Commit-ID: EbMZ7ZJEeCe
--HG--
extra : rebase_source : 3f507ca5776e4ad63ac2ea71f20376519953274c
This adds a DrawTargetOffset which is basically a simplified
DrawTargetTiled that only supports one tile. It useful for situations
where Cairo's device offset was used previously.
This also replaces WebRender's use of DrawTargetTiled which was just trying to
apply offset.
MozReview-Commit-ID: I33PB6CnHh0
--HG--
extra : rebase_source : 9fa51a0180343231cfca41daa0e3fa53f1b7befe
This patch was written entirely by the following script:
#!/bin/bash
if [ ! -d "./.hg" ]
then
echo "Not in a source tree." 1>&2
exit 1
fi
find . -regex '.*\(ref\|crash\)test.*\.list' | while read FILENAME
do
echo "Processing ${FILENAME}."
# The following has four substitutions:
# * The first one replaces the *first* argument to fuzzy() when it doesn't
# have a - in it, by replacing it with an explicit 0-N range.
# * The second one does the same for the *second* argument to fuzzy().
# * The third does the same for the *second* argument to fuzzy-if().
# * The fourth does the same for the *third* argument to fuzzy-if().
#
# Note that this is using perl rather than sed because perl doesn't
# support non-greedy matching, which is needed for the first argument to
# fuzzy-if.
perl -pi -e 's/(fuzzy\()([^ ,()-]*)(,[^ ,()]*\))/${1}0-${2}${3}/g;s/(fuzzy\([^ ,()]*,)([^ ,()-]*)(\))/${1}0-${2}${3}/g;s/(fuzzy-if\([^ ]*?,)([^ ,()-]*)(,[^ ,()]*\))/${1}0-${2}${3}/g;s/(fuzzy-if\([^ ]*?,[^ ,()]*,)([^ ,()-]*)(\))/${1}0-${2}${3}/g' "${FILENAME}"
done
Differential Revision: https://phabricator.services.mozilla.com/D2974
--HG--
extra : moz-landing-system : lando
We need to use the same visual for X drawable and glxContext,
otherwise we get BadMatch when we try to make the glxContext current.
The correct glx visual is already configured at nsWindow::Create()
so just use it if it also matches the frame buffer config.
MozReview-Commit-ID: 78IIfiwOnsf
--HG--
extra : rebase_source : 5ddfc0f94abafc7a1441eea095e546568bc31596
This commit exposes a method on DrawTargetCapture to see if it has
captured any drawing commands. This allows us to not dispatch
paint tasks if they will do nothing.
Ideally these tasks would execute instantly on the PaintThread, and
we would never delay sending the layer transaction or block on the
next paint, but with thread starvation and context switches it's
best to just not send them.
MozReview-Commit-ID: 7ywkEDBw6EX
--HG--
extra : rebase_source : c8f628180a3d908c8851e5c576296f903b9b255d
This commit adds the ability to create a different kind of DrawTargetCapture which
has a limit on the size of which its CaptureCommandList can grow before it is
synchronously flushed to its destination DrawTarget.
Special care is taken to not do a sync flush until we would need to resize
the backing store of the CaptureCommandList. This allows us to not waste
memory we've already allocated.
The async painting content clients are updated to use it, and get a default
value from a new preference.
MozReview-Commit-ID: CJL7ffvaRzR
--HG--
extra : rebase_source : 546d9838808320c51d9ceef0ed0ffcbb88a16269
This commit moves ContentClient from creating a CapturedBufferState for
buffer operations, to performing all of those operations on the
DrawTarget(Capture). Creating a DrawTargetCapture is now performed
by the RotatedBuffer when we BeginPaint, all operations are performed
on this capture, and then it's returned to the ClientPaintedLayer
as a PaintTask.
This commit is an involved refactoring of ContentClient and RotatedBuffer
to get this all to work. Here are the major parts:
1. RotatedBuffer is refactored to always perform operations on a single
DrawTarget, which may be a single DT, dual DT, or capture.
2. RotatedBuffer adds BeginCapture and EndCapture methods to switch
which DT is used in operations
3. ContentClient uses the RB capture methods when we are async painting
4. CC::BeginPaint is refactored to only perform capturing on a single
RotatedBuffer. This is because we can't have the output of one
PaintTask be the input of a different PaintTask due to the design
of the Snapshot API.
a. This can occur, today, by doing a FinalizeFrame only to later
fail to Unrotate the buffer, causing a new RB to be created
and painted into
b. The previous PaintThread code worked because it used the
buffer operations which didn't use Snapshot's
c. This is fixed by not doing FinalizeFrame on a buffer if we
realize we cannot unrotate it, and switching to initializing
a buffer using the front buffer which should be up to date.
d. I don't like touching this code, but it passes reftests,
might be a performance improvement, and I've tested it on
known regressions from the last time I messed up this code.
5. CC::PrepareForPaint is inlined into BeginPaint because dual draw
targets can be cleared correctly from a previous commit
6. The code paths in ClientPaintedLayer are unified because we no
longer need to special case this beyond setting the correct
ContentClient flag.
7. CapturedPaintState and CapturedBufferState are removed in favor
of PaintTask. Additionally EndLayer is no longer needed as all
quadrants of a rotated buffer are in the same capture, so we
don't need special case flushing code.
MozReview-Commit-ID: 9UI40dwran
--HG--
extra : rebase_source : 2f63464c1f8ca03992700b33838c4aa56608f872
This commit adds a buffer unrotate operation to DrawTarget. It's
initially implemented with LockBits in DrawTarget. DrawTargetDual
overrides the implementation to pass on the operation to it's
DrawTargets.
No override is given for DrawTargetCapture as we intentionally
avoid this code path when async painting as it can fail.
This is needed so that RotatedBuffer can expose a single DrawTarget,
which can be a DrawTarget (for normal alpha), DrawTargetDual (for
component alpha), or DrawTargetCapture (when async painting).
MozReview-Commit-ID: csjjZ733hl
--HG--
rename : gfx/layers/BufferUnrotate.cpp => gfx/2d/BufferUnrotate.cpp
rename : gfx/layers/BufferUnrotate.h => gfx/2d/BufferUnrotate.h
extra : rebase_source : efc838a3a4b196f78eda79ff3304c15d386bdc63
This commit adds the ability to create a SourceSurfaceDual directly,
instead of only from a DrawTargetDual. This allows SourceRotatedBuffer
to expose itself as a single SourceSurface for a later commit.
MozReview-Commit-ID: K21K42cGDy1
--HG--
extra : rebase_source : 33a523e45f7102343ebd5b3aa1faf2ff1f3d6f87
This commit renames CapturedTiledPaintState to PaintTask as in a future
commit I will fold CapturedPaintState into it.
MozReview-Commit-ID: 8py7SrK4s29
--HG--
extra : rebase_source : 1b5259cca6520761ae99e64157d047441b90b563
This commit refactors TiledContentClient to not create PaintThread
buffer operations, but to instead perform all of these operations
on the DrawTarget(Capture). This simplifies the code dramatically
and allows us to add flushing behavior to DrawTargetCapture in a
future commit.
With this change, CapturedTiledPaintState is simply a container
for a DrawTarget, DrawTargetCapture, and keep-alive TextureClients.
Part of this commit is moving the logic of locking the texture
clients, constructing a dual draw target, and constructing a capture
into TiledContentClient so it can be shared.
MozReview-Commit-ID: 2rwz9aDI737
--HG--
extra : rebase_source : 16a4b87263f28b32f5bcb5fd6d9756548f137e11
This commit adds a RAII class for the common operation of attempting
to lock one or two TextureClients and then maybe constructing a
DrawTargetDual from them.
MozReview-Commit-ID: ECQkDSgpyuL
--HG--
extra : rebase_source : abad14bfee32ea2fd1626069f8229487d1f05015
This commit changes the behavior of DrawTargetDual::Clear to be aware that
it has on-white and on-black buffers, and perform clearing appropriately.
This is slightly against what the DrawTarget documentation says the method
should do, but it allows us to move another paint thread operation into
DrawTargetCapture and simplify our ContentClient implementations.
I haven't seen any obvious breakage with this, and reftests are green.
An alternative would be to add a separate Clear method with documented
difference here.
MozReview-Commit-ID: 65CzcxlRqv7
--HG--
extra : rebase_source : 47403847e56521be90190eb6b70ec333f6daf5c0
This commit adds an operation to perform 'edge padding' on a draw
target. By default this is performed using LockBits, but it's
overriden in DrawTargetTiled and DrawTargetCapture to propagate
the call so it functions correctly.
This helps TiledContentClient move from applying this operation
on a per texture client basis, to being able to do it on the
DrawTargetTiled after painting. This in turn helps move all
paint thread operations into DrawTargetCapture.
MozReview-Commit-ID: 2ncOTxGXQfk
--HG--
rename : gfx/layers/BufferEdgePad.cpp => gfx/2d/BufferEdgePad.cpp
rename : gfx/layers/BufferEdgePad.h => gfx/2d/BufferEdgePad.h
extra : rebase_source : ab850358a763853d50d1f374f28e67a197740443
This introduces the machinery needed to generate crash annotations from a YAML
file. The relevant C++ functions are updated to take a typed enum. JavaScript
calls are unaffected but they will throw if the string argument does not
correspond to one of the known entries in the C++ enum. The existing whitelists
and blacklists of annotations are also generated from the YAML file and all
duplicate code related to them has been consolidated. Once written out to the
.extra file the annotations are converted in string form and are no different
than the existing ones.
All existing annotations have been included in the list (and some obsolete ones
have been removed) and all call sites have been updated including tests where
appropriate.
--HG--
extra : source : 4f6c43f2830701ec5552e08e3f1b06fe6d045860
This commit exposes a method on DrawTargetCapture to see if it has
captured any drawing commands. This allows us to not dispatch
paint tasks if they will do nothing.
Ideally these tasks would execute instantly on the PaintThread, and
we would never delay sending the layer transaction or block on the
next paint, but with thread starvation and context switches it's
best to just not send them.
MozReview-Commit-ID: 7ywkEDBw6EX
--HG--
extra : rebase_source : c60c1c25d551e4a7c14c529137f8e0babc888466
extra : source : 7ae4c893867a5f7df81e0757d4b4a6a21cbc6986
This commit adds the ability to create a different kind of DrawTargetCapture which
has a limit on the size of which its CaptureCommandList can grow before it is
synchronously flushed to its destination DrawTarget.
Special care is taken to not do a sync flush until we would need to resize
the backing store of the CaptureCommandList. This allows us to not waste
memory we've already allocated.
The async painting content clients are updated to use it, and get a default
value from a new preference.
MozReview-Commit-ID: CJL7ffvaRzR
--HG--
extra : rebase_source : f646862dcef7a480b21dfb7ddb1fa165338ba506
extra : source : b865a866fe5a3257615cb54b7e5e790cc9331988
This commit moves ContentClient from creating a CapturedBufferState for
buffer operations, to performing all of those operations on the
DrawTarget(Capture). Creating a DrawTargetCapture is now performed
by the RotatedBuffer when we BeginPaint, all operations are performed
on this capture, and then it's returned to the ClientPaintedLayer
as a PaintTask.
This commit is an involved refactoring of ContentClient and RotatedBuffer
to get this all to work. Here are the major parts:
1. RotatedBuffer is refactored to always perform operations on a single
DrawTarget, which may be a single DT, dual DT, or capture.
2. RotatedBuffer adds BeginCapture and EndCapture methods to switch
which DT is used in operations
3. ContentClient uses the RB capture methods when we are async painting
4. CC::BeginPaint is refactored to only perform capturing on a single
RotatedBuffer. This is because we can't have the output of one
PaintTask be the input of a different PaintTask due to the design
of the Snapshot API.
a. This can occur, today, by doing a FinalizeFrame only to later
fail to Unrotate the buffer, causing a new RB to be created
and painted into
b. The previous PaintThread code worked because it used the
buffer operations which didn't use Snapshot's
c. This is fixed by not doing FinalizeFrame on a buffer if we
realize we cannot unrotate it, and switching to initializing
a buffer using the front buffer which should be up to date.
d. I don't like touching this code, but it passes reftests,
might be a performance improvement, and I've tested it on
known regressions from the last time I messed up this code.
5. CC::PrepareForPaint is inlined into BeginPaint because dual draw
targets can be cleared correctly from a previous commit
6. The code paths in ClientPaintedLayer are unified because we no
longer need to special case this beyond setting the correct
ContentClient flag.
7. CapturedPaintState and CapturedBufferState are removed in favor
of PaintTask. Additionally EndLayer is no longer needed as all
quadrants of a rotated buffer are in the same capture, so we
don't need special case flushing code.
MozReview-Commit-ID: 9UI40dwran
--HG--
extra : rebase_source : 809d9816970648468de972c30b0c230c2f21e27b
extra : source : 405ad351821813333c0e989b93e2aeb49ba8552c
This commit adds a buffer unrotate operation to DrawTarget. It's
initially implemented with LockBits in DrawTarget. DrawTargetDual
overrides the implementation to pass on the operation to it's
DrawTargets.
No override is given for DrawTargetCapture as we intentionally
avoid this code path when async painting as it can fail.
This is needed so that RotatedBuffer can expose a single DrawTarget,
which can be a DrawTarget (for normal alpha), DrawTargetDual (for
component alpha), or DrawTargetCapture (when async painting).
MozReview-Commit-ID: csjjZ733hl
--HG--
rename : gfx/layers/BufferUnrotate.cpp => gfx/2d/BufferUnrotate.cpp
rename : gfx/layers/BufferUnrotate.h => gfx/2d/BufferUnrotate.h
extra : rebase_source : 5d96e2a5d36a01f2f9992adb37830e56436c7c35
extra : source : 64cb50b227e0ae604653f03ce2e892493126392e
This commit adds the ability to create a SourceSurfaceDual directly,
instead of only from a DrawTargetDual. This allows SourceRotatedBuffer
to expose itself as a single SourceSurface for a later commit.
MozReview-Commit-ID: K21K42cGDy1
--HG--
extra : rebase_source : d3fe48ac711f9cd28799bfd8d36b74750cb15554
extra : source : 392a724d5acd25854e871fa47335c4b938fe9ae1
This commit renames CapturedTiledPaintState to PaintTask as in a future
commit I will fold CapturedPaintState into it.
MozReview-Commit-ID: 8py7SrK4s29
--HG--
extra : rebase_source : 7abdf127351cdc82ee4c40112dce7150bdb67243
extra : source : 01110727f2e9e0846fc06997653e04860efb23dc
This commit refactors TiledContentClient to not create PaintThread
buffer operations, but to instead perform all of these operations
on the DrawTarget(Capture). This simplifies the code dramatically
and allows us to add flushing behavior to DrawTargetCapture in a
future commit.
With this change, CapturedTiledPaintState is simply a container
for a DrawTarget, DrawTargetCapture, and keep-alive TextureClients.
Part of this commit is moving the logic of locking the texture
clients, constructing a dual draw target, and constructing a capture
into TiledContentClient so it can be shared.
MozReview-Commit-ID: 2rwz9aDI737
--HG--
extra : rebase_source : 4ac317f632c0a2c21480bc88e6246f4dc0daf0be
extra : source : 56d967e03ee225e032034ffd193b6f42b343226b
This commit adds a RAII class for the common operation of attempting
to lock one or two TextureClients and then maybe constructing a
DrawTargetDual from them.
MozReview-Commit-ID: ECQkDSgpyuL
--HG--
extra : rebase_source : 6debecb9d4ca33895daa78de3a52a1ed575706e1
extra : source : 082638a5c6432e0ca6ce377986d84ed130b32ad3
This commit changes the behavior of DrawTargetDual::Clear to be aware that
it has on-white and on-black buffers, and perform clearing appropriately.
This is slightly against what the DrawTarget documentation says the method
should do, but it allows us to move another paint thread operation into
DrawTargetCapture and simplify our ContentClient implementations.
I haven't seen any obvious breakage with this, and reftests are green.
An alternative would be to add a separate Clear method with documented
difference here.
MozReview-Commit-ID: 65CzcxlRqv7
--HG--
extra : rebase_source : 299adbb02e79f66f7d6860c5fe86784bad8332f8
extra : source : 3dc47f17fa446bb7f2b5876753f8271a93c0e0c8
This commit adds an operation to perform 'edge padding' on a draw
target. By default this is performed using LockBits, but it's
overriden in DrawTargetTiled and DrawTargetCapture to propagate
the call so it functions correctly.
This helps TiledContentClient move from applying this operation
on a per texture client basis, to being able to do it on the
DrawTargetTiled after painting. This in turn helps move all
paint thread operations into DrawTargetCapture.
MozReview-Commit-ID: 2ncOTxGXQfk
--HG--
rename : gfx/layers/BufferEdgePad.cpp => gfx/2d/BufferEdgePad.cpp
rename : gfx/layers/BufferEdgePad.h => gfx/2d/BufferEdgePad.h
extra : rebase_source : a3315644fe31f2a432935dcbfdb9969c58b691e1
extra : source : 699c954992f87db7fc792f5562090de42a8162cb
system-info is a stub on Tier3 platforms while physical vs. logical
difference only matters for hyper-threading. As hyper-threading
is usually available on CPUs with more than 2 physical cores this
change has no impact there as the default is clamped to [1, 4].
However, on Intel i3-* CPUs with 2 physical and 4 logical cores this
bumps the default from 1 to 3.
MozReview-Commit-ID: 1Yh8rJL2JcN
--HG--
extra : rebase_source : 5c563ec8e388a3fd05a0650e8d4c330d48675332
Multiple tabs in the same process could be viewing the same image. If it
is an image we are taking some time to download from the network, it may
not be displayed all at once. As a result, it could generate several
dirty rects for the newly decoded lines each time we paint. Since we
only apply the dirty rect to the active tab, and forget it afterwards,
then when one returns to the other tab(s), it may not reupload all of
the modified image data. Now we save the dirty rect and accumulate it
for the handles which weren't able to be updated immediately.
Jeff Muizelaar
Lee Salzman
Ryan Hunt
Gurzau Raul
Tom Ritter
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