The change contains a number of incremental improvements with the main goal of:
- allocating exactly as many tile as required by the app
- respecting the picture caching option
Differential Revision: https://phabricator.services.mozilla.com/D24740
--HG--
extra : moz-landing-system : lando
Add an experimental code path that makes use of the pixel local
storage extension available on many mobile GPUs.
This code path is currently disabled by default, as the support
is not complete for all primitives and blend modes. The initial
aim is to get feature parity with the existing renderer.
Once that's complete, we can take advantage of the (minimum)
12 bytes per pixel of high speed on-tile memory to store custom
data.
Clip masks are a good use case for this, since they map 1:1 with
the position of the fragment they are clipping. Using this for
clip masks allows us to handle clipping on mobile GPUs in a much
more efficient way - we can skip (a) separate render targets,
(b) target resolve (c) sample the mask texture during rendering.
Depends on D24123
Differential Revision: https://phabricator.services.mozilla.com/D24124
--HG--
extra : moz-landing-system : lando
Most rounded rect clips in real content are (a) axis aligned and
(b) have uniform radii.
When these conditions are met, we can run a fast path for clip
mask generation that uses significantly fewer ALU shader ops.
This is not typically a bottleneck on desktop GPUs, but can have
a large performance impact on mobile GPUs (and perhaps low end
integrated GPUs).
The Mali shader analyzer reports the slow path for the rounded
rect clip shader to be 94 cycles per fragment, while the fast
path is 10 cycles.
Differential Revision: https://phabricator.services.mozilla.com/D23817
--HG--
extra : moz-landing-system : lando
Most rounded rect clips in real content are (a) axis aligned and
(b) have uniform radii.
When these conditions are met, we can run a fast path for clip
mask generation that uses significantly fewer ALU shader ops.
This is not typically a bottleneck on desktop GPUs, but can have
a large performance impact on mobile GPUs (and perhaps low end
integrated GPUs).
The Mali shader analyzer reports the slow path for the rounded
rect clip shader to be 94 cycles per fragment, while the fast
path is 10 cycles.
Differential Revision: https://phabricator.services.mozilla.com/D23817
--HG--
extra : moz-landing-system : lando
The cleans up our WR use statements further, easying the merge conflicts.
Note: this PR is subject to instant rot, it is preferred to land quickly.
Differential Revision: https://phabricator.services.mozilla.com/D23373
--HG--
extra : moz-landing-system : lando
The cleans up our WR use statements further, easying the merge conflicts.
Note: this PR is subject to instant rot, it is preferred to land quickly.
Differential Revision: https://phabricator.services.mozilla.com/D23373
--HG--
extra : moz-landing-system : lando
Env logger is useful for:
1. seeing error! generated by the code (by default). Sometimes it can give us hints on what is wrong with the capture, or a test right away.
2. seeing processed shader compile/link errors, which is very useful when changing them
Given that wrench is the main debugging tool at the moment, enabling the logging output by default should increase our productivity, at the cost of slightly longer build times.
Differential Revision: https://phabricator.services.mozilla.com/D23000
--HG--
extra : moz-landing-system : lando
This is the SDK version we use to build other Android stuff in
mozilla-central. It's simpler if we build Wrench using the same
target since we can reuse the toolchains.
Depends on D22376
Differential Revision: https://phabricator.services.mozilla.com/D22377
--HG--
extra : moz-landing-system : lando
The existing linear gradient shader is quite slow, especially
on very large gradients on integrated GPUs.
The vast majority of gradients in real content are very simple
(typically < 4 stops, no angle, no repeat). For these, we can
run a fast path to persist a small gradient in the texture cache
and draw the gradient via the image shader.
This is _much_ faster than the catch-all gradient shader, and also
results in better batching while drawing the main scene.
In future, we can expand the fast path to handle more cases, such
as angled gradients. For now, it takes a conservative approach,
but still seems to hit the fast path on most real content.
Differential Revision: https://phabricator.services.mozilla.com/D22445
--HG--
extra : moz-landing-system : lando
The goal of this change was to simplify the semantics of our document placement and split the logical elements inside (display list) from the actual screen rectangle occupied by a document.
To achieve that, we introduce the framebuffer space for things Y-flipped on screen.
We fix the frame outputs, so that they get produced on the first frame without loopback from the frame building to scene building.
Differential Revision: https://phabricator.services.mozilla.com/D21641
--HG--
extra : moz-landing-system : lando
The goal of this change was to simplify the semantics of our document placement and split the logical elements inside (display list) from the actual screen rectangle occupied by a document.
To achieve that, we introduce the framebuffer space for things Y-flipped on screen.
We fix the frame outputs, so that they get produced on the first frame without loopback from the frame building to scene building.
Differential Revision: https://phabricator.services.mozilla.com/D21641
--HG--
extra : moz-landing-system : lando
Change the external scroll offset to be a vector, rather than a
point. This can also be updated gecko-side in future, but for
now is converted to a vector at the API boundary.
Also plumb through the external scroll offset so that it is stored
inside the ScrollFrameInfo in a spatial node. This will allow
modifying the transforms that the clip-scroll tree creates to
take into account the external scroll offset in future.
Differential Revision: https://phabricator.services.mozilla.com/D21319
--HG--
extra : moz-landing-system : lando
A number of small tweaks to enable the picture caching invalidation
tests. With this in place, we can start adding more test coverage
for various invalidation scenarios.
- Make the reference image render after the test images, so that dirty
region tracking is more intuitive.
- Instead of replaying the same frame in wrench to ensure frames are
caching, try to cache tiles every frame when testing mode is enabled.
- Add a basic invalidation test for a rectangle with color that changes
each frame.
- Make the dirty region index implicit and rename dirty_region to dirty
in reftest format.
- Fix an underflow error when moving to next frame in wrench.
Differential Revision: https://phabricator.services.mozilla.com/D20963
--HG--
extra : moz-landing-system : lando
This is a new implementation of mix-blend compositing that is meant to be more idiomatic to WR and efficient.
Previously, mix-blend mode was composed in the following way:
1. parent stacking context was forced to isolate
2. source picture is also isolated
3. when rendering the isolated context, the framebuffer is read upon reaching the source. Both the readback and the source are placed in the RT cache.
4. a mix-blend draw call is issued to read from those cache segments and blend on top of the backdrop
The new implementation works by using the picture cutting (intruduced for preserve-3D contexts earlier) and some bits of magic:
1. backdrop stacking context is isolated with a special composition mode that prevents it from actually rendeing unless the suorce stacking context is invisible.
2. source stacking context is isolated with mix-blend composition mode that has a pointer to the backdrop picture
3. the instance of the backdrop picture is placed as a peer of the source picture (not a child)
4. if the backdrop is invisible, the source is drawn as a simple blit
5. otherwise, it's a draw call that reads from the isolated backdrop and source textures
Note the differences:
- parent stacking context is not isolated, but backdrop is
- no framebuffer readback is involved
- the source and backdrop pictures are rendered in parallel in a pass, improving the batching
- we don't blend onto the backdrop while reading from the backdrop copy at the same time
- the depth of the render pass tree is reduced: previously the parent and the source were isolated, now the source and the backdrop, which are siblings
Differential Revision: https://phabricator.services.mozilla.com/D20608
--HG--
rename : gfx/wr/wrench/reftests/blend/multiply-2-ref.yaml => gfx/wr/wrench/reftests/blend/multiply-3-ref.yaml
rename : gfx/wr/wrench/reftests/blend/multiply-3.yaml => gfx/wr/wrench/reftests/blend/multiply-4.yaml
extra : moz-landing-system : lando
This is a new implementation of mix-blend compositing that is meant to be more idiomatic to WR and efficient.
Previously, mix-blend mode was composed in the following way:
1. parent stacking context was forced to isolate
2. source picture is also isolated
3. when rendering the isolated context, the framebuffer is read upon reaching the source. Both the readback and the source are placed in the RT cache.
4. a mix-blend draw call is issued to read from those cache segments and blend on top of the backdrop
The new implementation works by using the picture cutting (intruduced for preserve-3D contexts earlier) and some bits of magic:
1. backdrop stacking context is isolated with a special composition mode that prevents it from actually rendeing unless the suorce stacking context is invisible.
2. source stacking context is isolated with mix-blend composition mode that has a pointer to the backdrop picture
3. the instance of the backdrop picture is placed as a peer of the source picture (not a child)
4. if the backdrop is invisible, the source is drawn as a simple blit
5. otherwise, it's a draw call that reads from the isolated backdrop and source textures
Note the differences:
- parent stacking context is not isolated, but backdrop is
- no framebuffer readback is involved
- the source and backdrop pictures are rendered in parallel in a pass, improving the batching
- we don't blend onto the backdrop while reading from the backdrop copy at the same time
- the depth of the render pass tree is reduced: previously the parent and the source were isolated, now the source and the backdrop, which are siblings
Differential Revision: https://phabricator.services.mozilla.com/D20608
--HG--
rename : gfx/wr/wrench/reftests/blend/multiply-2-ref.yaml => gfx/wr/wrench/reftests/blend/multiply-3-ref.yaml
rename : gfx/wr/wrench/reftests/blend/multiply-3.yaml => gfx/wr/wrench/reftests/blend/multiply-4.yaml
extra : moz-landing-system : lando
Without this patch any enclosing scale transform between a blurred
picture and the nearest raster root was being ignored entirely for the
purposes of blur.
Also includes a couple of reftests to exercise this code.
Differential Revision: https://phabricator.services.mozilla.com/D20908
--HG--
extra : moz-landing-system : lando
This is a new implementation of mix-blend compositing that is meant to be more idiomatic to WR and efficient.
Previously, mix-blend mode was composed in the following way:
1. parent stacking context was forced to isolate
2. source picture is also isolated
3. when rendering the isolated context, the framebuffer is read upon reaching the source. Both the readback and the source are placed in the RT cache.
4. a mix-blend draw call is issued to read from those cache segments and blend on top of the backdrop
The new implementation works by using the picture cutting (intruduced for preserve-3D contexts earlier) and some bits of magic:
1. backdrop stacking context is isolated with a special composition mode that prevents it from actually rendeing unless the suorce stacking context is invisible.
2. source stacking context is isolated with mix-blend composition mode that has a pointer to the backdrop picture
3. the instance of the backdrop picture is placed as a peer of the source picture (not a child)
4. if the backdrop is invisible, the source is drawn as a simple blit
5. otherwise, it's a draw call that reads from the isolated backdrop and source textures
Note the differences:
- parent stacking context is not isolated, but backdrop is
- no framebuffer readback is involved
- the source and backdrop pictures are rendered in parallel in a pass, improving the batching
- we don't blend onto the backdrop while reading from the backdrop copy at the same time
- the depth of the render pass tree is reduced: previously the parent and the source were isolated, now the source and the backdrop, which are siblings
Differential Revision: https://phabricator.services.mozilla.com/D20608
--HG--
rename : gfx/wr/wrench/reftests/blend/multiply-2-ref.yaml => gfx/wr/wrench/reftests/blend/multiply-3-ref.yaml
rename : gfx/wr/wrench/reftests/blend/multiply-3.yaml => gfx/wr/wrench/reftests/blend/multiply-4.yaml
extra : moz-landing-system : lando
On integrated GPUs, we are typically completely bound by memory
bandwidth and the number of pixels that get written / blended.
On real world pages, it's often the case that we end up with
clip tasks that are long in one dimension but not the other, due
to box-shadow edges, clip mask segments etc. When this occurs,
the logic that tries to get a small 'used_rect' to clear targets
to fails, since the union of those ends up being a very large
rect that covers (most of) the surface. This can cost a lot of
GPU time on some integrated chipsets.
Instead, it appears to be much faster to issue multiple clears,
one for each clip mask region, which is typically < 10% of the
surface we were clearing previously.
However, we can also restore an old optimization we used to have
which means we can skip clears altogether in the common case. The
first mask in a clip task will write to all the pixels in the mask,
so we can draw that with blending disabled (also a significant win
on integrated GPUs) and skip the clear in these cases. With this
functionality in place, the multiplicative blend mode is only
enabled for any clips other than the first in a mask (this is
quite a rare case - most clip tasks end up with a single mask).
On low end GPUs driving a 4k screen, I've measured GPU wins of up
to 5 ms/frame on some real world pages with this change.
Differential Revision: https://phabricator.services.mozilla.com/D19893
--HG--
extra : moz-landing-system : lando
For some reason running these via cross-compiled wrench in Mozilla
automation produces a few pixels difference.
Differential Revision: https://phabricator.services.mozilla.com/D19368
--HG--
extra : source : f06721b552a819e4d2456f1c31d62c782d9a42cb
This introduces some env vars to allow running cross-compiled
binaries instead of running things on the builder. Additionally
the `cargo test --features "ipc"` check is modified to be `check`
instead since there are no actual tests being run by that command.
The only thing we lose is a rustdoc example check but we are
checking that on Linux anyway so doing it for Mac is redundant.
Differential Revision: https://phabricator.services.mozilla.com/D19367
--HG--
extra : source : ee403c79877e028c58fa9091dd360fe50a80af37
Dzmitry Malyshau
Glenn Watson
Bogdan Tara
Alexis Beingessner
Gurzau Raul
Nicolas Silva
Kartikaya Gupta
Ciure Andrei
Lee Salzman
Csoregi Natalia
Timothy Nikkel
Noemi Erli
Razvan Maries
Dorel Luca