The PNG decoder lacks fast implementations for swizzling/unpacking
inside the library, and both PNG and WebP may need to perform
premultiplication due to the alpha channel. This patch adds a new filter
allowing us to take advantage of our accelerated implementations to
perform these transformations on their behalf.
Differential Revision: https://phabricator.services.mozilla.com/D46449
--HG--
extra : moz-landing-system : lando
Some filters can do the copy of the given data into the working buffer
as part of the filter operation. For those that cannot, we will just
copy the data first, and then advance the row.
Differential Revision: https://phabricator.services.mozilla.com/D46448
--HG--
extra : moz-landing-system : lando
The PNG decoder lacks fast implementations for swizzling/unpacking
inside the library, and both PNG and WebP may need to perform
premultiplication due to the alpha channel. This patch adds a new filter
allowing us to take advantage of our accelerated implementations to
perform these transformations on their behalf.
Differential Revision: https://phabricator.services.mozilla.com/D46449
--HG--
extra : moz-landing-system : lando
Some filters can do the copy of the given data into the working buffer
as part of the filter operation. For those that cannot, we will just
copy the data first, and then advance the row.
Differential Revision: https://phabricator.services.mozilla.com/D46448
--HG--
extra : moz-landing-system : lando
The PNG decoder lacks fast implementations for swizzling/unpacking
inside the library, and both PNG and WebP may need to perform
premultiplication due to the alpha channel. This patch adds a new filter
allowing us to take advantage of our accelerated implementations to
perform these transformations on their behalf.
Differential Revision: https://phabricator.services.mozilla.com/D46449
--HG--
extra : moz-landing-system : lando
Some filters can do the copy of the given data into the working buffer
as part of the filter operation. For those that cannot, we will just
copy the data first, and then advance the row.
Differential Revision: https://phabricator.services.mozilla.com/D46448
--HG--
extra : moz-landing-system : lando
The PNG decoder lacks fast implementations for swizzling/unpacking
inside the library, and both PNG and WebP may need to perform
premultiplication due to the alpha channel. This patch adds a new filter
allowing us to take advantage of our accelerated implementations to
perform these transformations on their behalf.
Differential Revision: https://phabricator.services.mozilla.com/D46449
--HG--
extra : moz-landing-system : lando
Some filters can do the copy of the given data into the working buffer
as part of the filter operation. For those that cannot, we will just
copy the data first, and then advance the row.
Differential Revision: https://phabricator.services.mozilla.com/D46448
--HG--
extra : moz-landing-system : lando
The clear rect and the recycle rect can overlap, and depending on the
size of the clear rect, it could be a significant amount of data that
needs to be copied from the restore frame. This patch minimizes the
copying for a row which contains both the recycle rect and the clear
rect.
Differential Revision: https://phabricator.services.mozilla.com/D7508
Given an invalidation rect, called the recycle rect, which represents
the area which may have changed between the current frame and the frame
we are recycling, we can not only reuse the buffer itself to avoid an
allocation and free, we can also avoid copying pixel data from the
restore frame which is already set.
Differential Revision: https://phabricator.services.mozilla.com/D7507
This new SurfaceFilter can be added to a SurfacePipe to perform the
blending of a previous frame with the current partial frame, for an
animated image. This functionality is currently provided by
FrameAnimator and must be performed each time we want to advance the
displayed frame, all on the main thread. Moving this to SurfacePipe
allows us to do the same operation once per frame decode, and on a
decoder thread.
This should reduce the cost of a refresh tick since advancing animated
images is reduced to merely checking if the frame is available. Also, if
the image is below the discard frames threshold (to save memory), then
we will also save CPU due to only blending once at decode.
This new SurfaceFilter can be added to a SurfacePipe to perform the
blending of a previous frame with the current partial frame, for an
animated image. This functionality is currently provided by
FrameAnimator and must be performed each time we want to advance the
displayed frame, all on the main thread. Moving this to SurfacePipe
allows us to do the same operation once per frame decode, and on a
decoder thread.
This should reduce the cost of a refresh tick since advancing animated
images is reduced to merely checking if the frame is available. Also, if
the image is below the discard frames threshold (to save memory), then
we will also save CPU due to only blending once at decode.
Andrew Osmond
Cosmin Sabou
Oana Pop Rus
championshuttler
Timothy Nikkel
Brindusan Cristian
Sylvestre Ledru
Coroiu Cristina
Milan Sreckovic
Seth Fowler
Seth Fowler