Reason for revert:
Causing breakages on Mac build.
Original issue's description:
> Make nanobench and dm be usable from Chromium build
>
> Move the app logic for each app as follows:
>
> <app>.cpp -- the file which contains main(). Embedders that compile
> their own apps, such as ios shell, upcoming Chromium dm etc, do not use this.
>
> <app>_main.cpp -- the main logic of the Skia test application. This will be
> used by Skia -compiled apps as well as embedder -compiled apps.
>
> <app>_main.h -- the API for the main logic. This will be
> used by Skia -compiled apps as well as embedder -compiled apps.
>
> This way (the upcoming) Chromium dm can setup its Chromium-specific setup
> in custom main(), and then call dm_main(), without the need of any
> SK_BUILD_FOR_XXXX defines controlling whether the tool defines main or not.
>
> BUG=skia:2992
>
> Committed: https://skia.googlesource.com/skia/+/c092d3bdab5f723576cc0346cea3ee282a9cb444TBR=mtklein@chromium.org,mtklein@google.com,borenet@google.com,kkinnunen@nvidia.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2992
Review URL: https://codereview.chromium.org/724073002
The fixes include
- detect when finding the active top loops between two possible answers
- preflight chasing winding to ensure answer is consistent
- binary search more often when quadratic intersection fails
- add more failure paths when an intersect is missed
While this fixes the chrome bug, reenabling path ops in svg should be deferred until additional fixes are landed.
TBR=
BUG=421132
Committed: https://skia.googlesource.com/skia/+/6f726addf3178b01949bb389ef83cf14a1d7b6b2
Review URL: https://codereview.chromium.org/633393002
Move the app logic for each app as follows:
<app>.cpp -- the file which contains main(). Embedders that compile
their own apps, such as ios shell, upcoming Chromium dm etc, do not use this.
<app>_main.cpp -- the main logic of the Skia test application. This will be
used by Skia -compiled apps as well as embedder -compiled apps.
<app>_main.h -- the API for the main logic. This will be
used by Skia -compiled apps as well as embedder -compiled apps.
This way (the upcoming) Chromium dm can setup its Chromium-specific setup
in custom main(), and then call dm_main(), without the need of any
SK_BUILD_FOR_XXXX defines controlling whether the tool defines main or not.
BUG=skia:2992
Review URL: https://codereview.chromium.org/657373002
Like SkChunkAlloc, but
- does its allocation with better sympathy for malloc granularity;
- the fast path inlines entirely;
- smaller per-block overhead;
- smaller per-SkVarAlloc overhead;
- growth parameters are a little more tunable.
Its main downside is less flexibility; it supports fewer methods than SkChunkAlloc.
These current parameters bring the first allocation down from 4K to 1K,
without affecting recording time on my desktop. skiaperf.com will tell the
whole story.
BUG=skia:
Review URL: https://codereview.chromium.org/674263002
This will help with the ability to subclass, add to, etc. GrInvariantOutput. Also it was simply
getting a little too big to be a "supporting" subclass
BUG=skia:
Review URL: https://codereview.chromium.org/699943003
Most recently introduced here: https://codereview.chromium.org/304333002
It appears these are not currently needed (I just disabled it and
successfully built).
Since we appear to be out of the transitional period, I propose we
remove them so we can know if we deprecate something Android uses
(and fix the call site).
Review URL: https://codereview.chromium.org/696063006
work on tests
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu13.10-GCE-NoGPU-x86_64-Debug-ASAN-Trybot,Test-Ubuntu12-ShuttleA-GTX660-x86-Debug-Trybot,Test-Win7-ShuttleA-HD2000-x86_64-Debug-Trybot,Test-Win7-ShuttleA-HD2000-x86-Debug-Trybot
BUG=skia:
Review URL: https://codereview.chromium.org/704923003
We previously saw crashes decoding bad ICO files. Add tests for
known bad files.
While testing, I learned that one of them still crashes. Check for
large offset and size separately to fix the crash.
BUG=skia:2878
Review URL: https://codereview.chromium.org/712123002
Reason for revert:
Not compiling in ANGLE build
Original issue's description:
> Get gpudft support working in dm, gm, nanobench and bench_pictures
>
> Adds a new config to test distance field text.
> Clean up some flags and #defines to read "distance field text",
> not "distance field fonts" to be consistent with Chromium
>
> NOTREECHECKS=true
>
> Committed: https://skia.googlesource.com/skia/+/06ba179838ba4fe187cf290750aeeb4a02a2960bTBR=bsalomon@google.com,mtklein@google.com,reed@google.com
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/707723005
Adds a new config to test distance field text.
Clean up some flags and #defines to read "distance field text",
not "distance field fonts" to be consistent with Chromium
NOTREECHECKS=true
Review URL: https://codereview.chromium.org/699453005
Add JsonWriter, which handles Json output from DM, in preparation for
adding json output for tests. This change should not affect behavior.
BUG=skia:2454
Review URL: https://codereview.chromium.org/702513003
This change is here since previously color bitmap text was rendered using a
geometry processor in the coverage stage. The problem with this is that we
cannot correctly do xfer modes with this method. So I now make color bitmap text
draw using a color stage in the same was as a draw bitmap call.
One issue that arrises from this fix is that we end up adding this final color
processor after any previous color processors. Thus if we have a custom blend
implemented as a color processor it will be before this text one and we won't
blend correctly. This issue will get fixed once an xfer processor is fully
implemented. I have hacked a test locally to show that if we can add the text
color processor to the begining of the color stages we do blend correctly in all
cases (so the xfer processor will be a fix).
BUG=skia:
Review URL: https://codereview.chromium.org/689923004
public_headers.gypi was never needed by Skia proper, and was almost
always out of date. Its actual user no longer needs it, so stop
updating it with every other change to public headers.
BUG=skia:2350
Review URL: https://codereview.chromium.org/683123003
Adds DrawingMethods with some of the methods it defines. Context is now
an implementation of DrawingMethods.
The sample.js file now shows how the context is used.
Not much new code here, that's mostly in DrawingMethods::DrawPath, most everything else is a code move.
BUG=skia:
Review URL: https://codereview.chromium.org/676423002
Also:
- SkWindow now has createSurface, not createCanvas.
- Add the platform init code v8 now seems to require.
- Fix library linkage.
- Call isolate->Enter(); because it doesn't look
like v8 starts with a default isolate to begin with.
BUG=skia:
Review URL: https://codereview.chromium.org/673223002
The file is unused, but we cannot safely delete it until we remove
the reference in a chromium gyp file.
BUG=skia:2350
Review URL: https://codereview.chromium.org/663913003
all its commands interleaved in contiguous memory. GrTRecorder also
supports extra data associated with objects, so we can store arrays
inline without having to call malloc().
Review URL: https://codereview.chromium.org/628453002
Reason for revert:
Want to think about how to do this only to skialib and not to tools (gms, tests, etc.)
Original issue's description:
> No threadsafe statics.
>
> Chrome disables these for speed and code size, so we need
> to disable them to make sure our code is safe when used
> this way.
>
> int foo() {
> static int32_t atomic_thing;
> return sk_atomic_inc(&atomic_thing);
> }
>
> is not safe in Chrome. Making the static global is:
>
> static int32_t atomic_thing;
> int foo() {
> return sk_atomic_inc(&atomic_thing);
> }
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/cad5d3e264535c919b80e1e2a85407307961f221TBR=bungeman@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:
Review URL: https://codereview.chromium.org/649343003
Chrome disables these for speed and code size, so we need
to disable them to make sure our code is safe when used
this way.
int foo() {
static int32_t atomic_thing;
return sk_atomic_inc(&atomic_thing);
}
is not safe in Chrome. Making the static global is:
static int32_t atomic_thing;
int foo() {
return sk_atomic_inc(&atomic_thing);
}
BUG=skia:
Review URL: https://codereview.chromium.org/654663002
all its commands interleaved in contiguous memory. GrTBaseList also
supports extra data associated with objects, so we can store arrays
inline without having to call malloc().
Review URL: https://codereview.chromium.org/628453002
GCC doesn't understand -fasm-blocks or -mpascal-strings, but we don't care
about them.
While looking around in Gyp, I noticed a better way to disable warnings about
offsetof so that it doesn't tell us "disabling this warning makes no sense in C"
for every C source file we compile.
BUG=skia:
Review URL: https://codereview.chromium.org/650553002
Draw thick-stroked Beziers by computing the outset quadratic, measuring the error, and subdividing until the error is within a predetermined limit.
To try this CL out, change src/core/SkStroke.h:18 to
#define QUAD_STROKE_APPROXIMATION 1
or from the command line: CPPFLAGS="-D QUAD_STROKE_APPROXIMATION=1" ./gyp_skia
Here's what's in this CL:
bench/BezierBench.cpp : a microbench for examining where the time is going
gm/beziers.cpp : random Beziers with various thicknesses
gm/smallarc.cpp : a distillation of bug skia:2769
samplecode/SampleRotateCircles.cpp : controls added for error, limit, width
src/core/SkStroke.cpp : the new stroke implementation (disabled)
tests/StrokerTest.cpp : a stroke torture test that checks normal and extreme values
The new stroke algorithm has a tweakable parameter:
stroker.setError(1); (SkStrokeRec.cpp:112)
The stroke error is the allowable gap between the midpoint of the stroke quadratic and the center Bezier. As the projection from the quadratic approaches the endpoints, the error is decreased proportionally so that it is always inside the quadratic curve.
An overview of how this works:
- For a given T range of a Bezier, compute the perpendiculars and find the points outset and inset for some radius.
- Construct tangents for the quadratic stroke.
- If the tangent don't intersect between them (may happen with cubics), subdivide.
- If the quadratic stroke end points are close (again, may happen with cubics), draw a line between them.
- Compute the quadratic formed by the intersecting tangents.
- If the midpoint of the quadratic is close to the midpoint of the Bezier perpendicular, return the quadratic.
- If the end of the stroke at the Bezier midpoint doesn't intersect the quad's bounds, subdivide.
- Find where the Bezier midpoint ray intersects the quadratic.
- If the intersection is too close to the quad's endpoints, subdivide.
- If the error is large proportional to the intersection's distance to the quad's endpoints, subdivide.
BUG=skia:723,skia:2769
Review URL: https://codereview.chromium.org/558163005
Make the Sk GL context class, SkGLNativeContext, an abstract base class. Before,
it depended on ifdefs to implement the platform dependent polymorphism. Move
the logic to subclasses of the various platform implementations.
This a step to enable Skia embedders to compile dm and bench_pictures. The
concrete goal is to support running these test apps with Chromium command buffer.
With this change, Chromium can implement its own version of SkGLNativeContext
that uses command buffer, and host the implementation in its own repository.
Implements the above by renaming the SkGLContextHelper to SkGLContext and
removing the unneeded SkGLNativeContext. Also removes
SkGLNativeContext::AutoRestoreContext functionality, it appeared to be unused:
no use in Skia code, and no tests.
BUG=skia:2992
Committed: https://skia.googlesource.com/skia/+/a90ed4e83897b45d6331ee4c54e1edd4054de9a8
Review URL: https://codereview.chromium.org/630843002
Reason for revert:
nanobech failing on Android
Original issue's description:
> Make the Sk GL context class an abstract base class
>
> Make the Sk GL context class, SkGLNativeContext, an abstract base class. Before,
> it depended on ifdefs to implement the platform dependent polymorphism. Move
> the logic to subclasses of the various platform implementations.
>
> This a step to enable Skia embedders to compile dm and bench_pictures. The
> concrete goal is to support running these test apps with Chromium command buffer.
>
> With this change, Chromium can implement its own version of SkGLNativeContext
> that uses command buffer, and host the implementation in its own repository.
>
> Implements the above by renaming the SkGLContextHelper to SkGLContext and
> removing the unneeded SkGLNativeContext. Also removes
> SkGLNativeContext::AutoRestoreContext functionality, it appeared to be unused:
> no use in Skia code, and no tests.
>
> BUG=skia:2992
>
> Committed: https://skia.googlesource.com/skia/+/a90ed4e83897b45d6331ee4c54e1edd4054de9a8TBR=kkinnunen@nvidia.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2992
Review URL: https://codereview.chromium.org/639793002
Make the Sk GL context class, SkGLNativeContext, an abstract base class. Before,
it depended on ifdefs to implement the platform dependent polymorphism. Move
the logic to subclasses of the various platform implementations.
This a step to enable Skia embedders to compile dm and bench_pictures. The
concrete goal is to support running these test apps with Chromium command buffer.
With this change, Chromium can implement its own version of SkGLNativeContext
that uses command buffer, and host the implementation in its own repository.
Implements the above by renaming the SkGLContextHelper to SkGLContext and
removing the unneeded SkGLNativeContext. Also removes
SkGLNativeContext::AutoRestoreContext functionality, it appeared to be unused:
no use in Skia code, and no tests.
BUG=skia:2992
Review URL: https://codereview.chromium.org/630843002
this is a huge refactor and cleanup of the gl shader building system in
Skia. The entire shader building pipeline is now part of
GrGLProgramCreator, which takes a gp, and some fps, and creates a
program. I added some subclasses of GrGLProgram to handle the
eccentricities of Nvpr/Nvpres. Outside of the builders folder
and GrGLPrograms, this change is basically just a rename
solo gp
BUG=skia:
Committed: https://skia.googlesource.com/skia/+/fe1233c3f12f81bb675718516bbb32f72af726ec
Review URL: https://codereview.chromium.org/611653002
Reason for revert:
Seems to have messed up windows 7 gms
Original issue's description:
> Cleanup of shader building system
>
> this is a huge refactor and cleanup of the gl shader building system in
> Skia. The entire shader building pipeline is now part of
> GrGLProgramCreator, which takes a gp, and some fps, and creates a
> program. I added some subclasses of GrGLProgram to handle the
> eccentricities of Nvpr/Nvpres. Outside of the builders folder
> and GrGLPrograms, this change is basically just a rename
>
>
> solo gp
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/fe1233c3f12f81bb675718516bbb32f72af726ecTBR=bsalomon@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:
Review URL: https://codereview.chromium.org/635533005
this is a huge refactor and cleanup of the gl shader building system in
Skia. The entire shader building pipeline is now part of
GrGLProgramCreator, which takes a gp, and some fps, and creates a
program. I added some subclasses of GrGLProgram to handle the
eccentricities of Nvpr/Nvpres. Outside of the builders folder
and GrGLPrograms, this change is basically just a rename
solo gp
BUG=skia:
Review URL: https://codereview.chromium.org/611653002
We use this on Linux already, but for whatever reason wasn't a problem on iOS
until using it in SkPaint. Mac 10.7 and 10.8 are showing this warning too,
but seems -Werror is not enabled.
CQ_EXTRA_TRYBOTS=tryserver.skia:Build-Mac10.7-Clang-Arm7-Release-iOS-Trybot
BUG=skia:
Review URL: https://codereview.chromium.org/637593002
Now that the old backend's not using BBHs, we can specialize them for
SkRecord's needs. The only thing we really want to store is op index, which
should always be small enough to fit into an unsigned (unsigned also helps keep
it straight from other ints floating around).
This means we'll need half (32-bit) or a quarter (64-bit) the bytes in SkTileGrid,
because we don't have to store an extra int for ordering.
BUG=skia:2834
Review URL: https://codereview.chromium.org/617393004
Feature-wise, this removes:
1) BBH support;
2) peephole optimizations;
3) record-time text op specializations;
4) the guarantee that SkPaints are flattened.
This deletes the optimizations GM, which only exists to test the peepholes of
the old backend. SkRecord optimizations are unit tested, and if that ever fails we
can think about adding another GM like this, but they're different enough we'd
want to start from scratch anyway.
We need to keep the code that plays back the specialized text ops around for
a while for compatibility with existing .SKPs that have those ops recorded.
BUG=skia:
CQ_EXTRA_TRYBOTS=tryserver.skia:Canary-Chrome-Ubuntu13.10-Ninja-x86_64-ToT-Trybot
R=robertphillips@google.com, reed@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/617953002
typeface. Loads the paths using the driver's glyph loading routines.
Refactors GrPathRange to accept a PathGenerator class that it uses to
lazily initialize its paths. The client code is no longer expected to
initialize the paths in a GrPathRange; instead it must provide a
PathGenerator* instance to createPathRange().
Adds a new createGlyphs() method to GrPathRendering that creates a
range of glyph paths, indexed by glyph id. GrPathRendering implements
createGlyphs() with a PathGenerator that loads glyph paths using the
skia frameworks. GrGLPathRendering uses glMemoryGlyphIndexArrayNV()
instead, when possible, to load the glyph paths.
Removes all GlyphPathRange logic from GrStencilAndCoverTextContext.
It instead uses createGlyphs().
BUG=skia:2939
R=bsalomon@google.com, jvanverth@google.com
Author: cdalton@nvidia.com
Review URL: https://codereview.chromium.org/563283004
This is a bit like a limited SkData, geared to store really tiny byte strings.
This is not hooked up anywhere beyond the new unit test. I did experimentally
plumb it into SkRecord for drawPosTextH: just over 40% of drawPosTextH calls in
our repo can fit into ShortData.
BUG=skia:
R=reed@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/573323002
This makes it considerably cheaper to run SKP recording benchmarks, without
affecting their measurements and without really affecting SKP playback
benchmarks at all.
On my machine, running out/Release/nanobench --match skp --config nondrendering
drops in run time from 6.7s to 2.5s, and the peak RAM usage drops from 129M to 50M.
I'm strongly considering making this lazy decoding the default.
BUG=skia:
R=robertphillips@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/572933006
This adds SkResourceCache::Remove() which will remove a resource from
its cache. The resource is required to be unlocked at the time Remove()
is called.
Then SkBitmapCache::Find() makes use of this to Remove() bitmaps from
the cache whose pixels have been evicted. This allows the bitmap to be
re-added to the cache with pixels again.
After this change, background a tab (and discarding all the bitmaps'
contents) no longer disables image caching for those discarded images
once the tab is visible again.
BUG=skia:2926
NOTRY=true
R=reed@android.com, tomhudson@google.com, reed@google.com
Author: danakj@chromium.org
Review URL: https://codereview.chromium.org/561953002
Today we measure SkPicture playback speed, but not the time it takes to record
the SkPicture. This fixes that by reading SKPs from disk and re-recording them.
On the console, recording shows up first as the nonrendering skp benches,
followed later by the usual playback benches:
maxrss loops min median mean max stddev samples config bench
51M 2 165µs 168µs 169µs 178µs 3% ▆▄▃█▂▄▁▂▁▁ nonrendering tabl_slashdot.skp
57M 1 9.72ms 9.77ms 9.79ms 9.97ms 1% █▂▂▅▃▂▁▄▂▁ nonrendering desk_pokemonwiki.skp
57M 32 2.92µs 2.96µs 3.03µs 3.46µs 6% ▅▁▁▁▁▁▁█▂▁ nonrendering desk_yahoosports.skp
...
147M 1 3.86ms 3.87ms 3.97ms 4.81ms 7% █▁▁▁▁▁▁▁▁▁ 8888 tabl_slashdot.skp_1
147M 1 4.54ms 4.56ms 4.55ms 4.56ms 0% █▅▇▅█▅▂▁▅▁ 565 tabl_slashdot.skp_1
147M 2 3.08ms 3.24ms 4.17ms 8.18ms 50% █▁▁█▁▁▁▁▁▁ gpu tabl_slashdot.skp_1
147M 1 1.61ms 1.62ms 1.69ms 2.33ms 13% █▁▁▁▁▁▁▁▁▁ 8888 desk_pokemonwiki.skp_1
147M 1 1.44ms 1.44ms 1.45ms 1.47ms 1% ▅▂█▂▂▅▁▁▂▁ 565 desk_pokemonwiki.skp_1
...
On skiaperf.com, they'll also be separated out from playback benches by bench_type.
BUG=skia:
R=reed@google.com, mtklein@google.com, jcgregorio@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/559153002
This has the nice property of being able to double-check hashes after the fact.
mtklein@mtklein ~/skia (hash-png)> md5sum bad/8888/3x3bitmaprect.png
deede70ab2f34067d461fb4a93332d4c bad/8888/3x3bitmaprect.png
mtklein@mtklein ~/skia (hash-png)> grep 3x3bitmaprect_8888 bad/dm.json
"3x3bitmaprect_8888" : "deede70ab2f34067d461fb4a93332d4c",
I have checked that no two premultiplied colors map to the same unpremultiplied
color (math nerds: unpremultiplication is injective), so a change in
premultiplied SkBitmap will always imply a change in the encoded
unpremultiplied .png. This means, it's safe to hash .pngs; we won't miss
subtle changes.
BUG=skia:
R=jcgregorio@google.com, stephana@google.com, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/549203003
SkTaskGroup is like SkThreadPool except the threads stay in
one global pool. Each SkTaskGroup itself is tiny (4 bytes)
and its wait() method applies only to tasks add()ed to that
instance, not the whole thread pool.
This means we don't need to bring up new thread pools when
tests themselves want to use multithreading (e.g. pathops,
quilt). We just create a new SkTaskGroup and wait for that
to complete. This should be more efficient, and allow us
to expand where we use threads to really latency sensitive
places. E.g. we can probably now use these in nanobench
for CPU .skp rendering.
Now that all threads are sharing the same pool, I think we
can remove most of the custom mechanism pathops tests use
to control threading. They'll just ride on the global pool
with all other tests now.
This (temporarily?) removes the GPU multithreading feature
from DM, which we don't use.
On my desktop, DM runs a little faster (57s -> 55s) in
Debug, and a lot faster in Release (36s -> 24s). The bots
show speedups of similar proportions, cutting more than a
minute off the N4/Release and Win7/Debug runtimes.
BUG=skia:
Committed: https://skia.googlesource.com/skia/+/9c7207b5dc71dc5a96a2eb107d401133333d5b6fR=caryclark@google.com, bsalomon@google.com, bungeman@google.com, mtklein@google.com, reed@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/531653002
Reason for revert:
Leaks, leaks, leaks.
Original issue's description:
> SkThreadPool ~~> SkTaskGroup
>
> SkTaskGroup is like SkThreadPool except the threads stay in
> one global pool. Each SkTaskGroup itself is tiny (4 bytes)
> and its wait() method applies only to tasks add()ed to that
> instance, not the whole thread pool.
>
> This means we don't need to bring up new thread pools when
> tests themselves want to use multithreading (e.g. pathops,
> quilt). We just create a new SkTaskGroup and wait for that
> to complete. This should be more efficient, and allow us
> to expand where we use threads to really latency sensitive
> places. E.g. we can probably now use these in nanobench
> for CPU .skp rendering.
>
> Now that all threads are sharing the same pool, I think we
> can remove most of the custom mechanism pathops tests use
> to control threading. They'll just ride on the global pool
> with all other tests now.
>
> This (temporarily?) removes the GPU multithreading feature
> from DM, which we don't use.
>
> On my desktop, DM runs a little faster (57s -> 55s) in
> Debug, and a lot faster in Release (36s -> 24s). The bots
> show speedups of similar proportions, cutting more than a
> minute off the N4/Release and Win7/Debug runtimes.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/9c7207b5dc71dc5a96a2eb107d401133333d5b6fR=caryclark@google.com, bsalomon@google.com, bungeman@google.com, reed@google.com, mtklein@chromium.orgTBR=bsalomon@google.com, bungeman@google.com, caryclark@google.com, mtklein@chromium.org, reed@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:
Author: mtklein@google.com
Review URL: https://codereview.chromium.org/533393002
SkTaskGroup is like SkThreadPool except the threads stay in
one global pool. Each SkTaskGroup itself is tiny (4 bytes)
and its wait() method applies only to tasks add()ed to that
instance, not the whole thread pool.
This means we don't need to bring up new thread pools when
tests themselves want to use multithreading (e.g. pathops,
quilt). We just create a new SkTaskGroup and wait for that
to complete. This should be more efficient, and allow us
to expand where we use threads to really latency sensitive
places. E.g. we can probably now use these in nanobench
for CPU .skp rendering.
Now that all threads are sharing the same pool, I think we
can remove most of the custom mechanism pathops tests use
to control threading. They'll just ride on the global pool
with all other tests now.
This (temporarily?) removes the GPU multithreading feature
from DM, which we don't use.
On my desktop, DM runs a little faster (57s -> 55s) in
Debug, and a lot faster in Release (36s -> 24s). The bots
show speedups of similar proportions, cutting more than a
minute off the N4/Release and Win7/Debug runtimes.
BUG=skia:
R=caryclark@google.com, bsalomon@google.com, bungeman@google.com, mtklein@google.com, reed@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/531653002
