When the Android runtime starts, the system preloads a series of assets
in the Zygote process. These assets are shared across all processes.
Unfortunately, each one of these assets is later uploaded in its own
OpenGL texture, once per process. This wastes memory and generates
unnecessary OpenGL state changes.
This CL introduces an asset server that provides an atlas to all processes.
Note: bitmaps used by skia shaders are *not* sampled from the atlas.
It's an uncommon use case and would require extra texture transforms
in the GL shaders.
WHAT IS THE ASSETS ATLAS
The "assets atlas" is a single, shareable graphic buffer that contains
all the system's preloaded bitmap drawables (this includes 9-patches.)
The atlas is made of two distinct objects: the graphic buffer that
contains the actual pixels and the map which indicates where each
preloaded bitmap can be found in the atlas (essentially a pair of
x and y coordinates.)
HOW IS THE ASSETS ATLAS GENERATED
Because we need to support a wide variety of devices and because it
is easy to change the list of preloaded drawables, the atlas is
generated at runtime, during the startup phase of the system process.
There are several steps that lead to the atlas generation:
1. If the device is booting for the first time, or if the device was
updated, we need to find the best atlas configuration. To do so,
the atlas service tries a number of width, height and algorithm
variations that allows us to pack as many assets as possible while
using as little memory as possible. Once a best configuration is found,
it gets written to disk in /data/system/framework_atlas
2. Given a best configuration (algorithm variant, dimensions and
number of bitmaps that can be packed in the atlas), the atlas service
packs all the preloaded bitmaps into a single graphic buffer object.
3. The packing is done using Skia in a temporary native bitmap. The
Skia bitmap is then copied into the graphic buffer using OpenGL ES
to benefit from texture swizzling.
HOW PROCESSES USE THE ATLAS
Whenever a process' hardware renderer initializes its EGL context,
it queries the atlas service for the graphic buffer and the map.
It is important to remember that both the context and the map will
be valid for the lifetime of the hardware renderer (if the system
process goes down, all apps get killed as well.)
Every time the hardware renderer needs to render a bitmap, it first
checks whether the bitmap can be found in the assets atlas. When
the bitmap is part of the atlas, texture coordinates are remapped
appropriately before rendering.
Change-Id: I8eaecf53e7f6a33d90da3d0047c5ceec89ea3af0
This change required fixing some bugs in how AAPT handles
qualified symbols such as "android:layout_height"
when generating JavaDoc links. The links were being
generated using the package name of the generated R file
rather than the package name of the referenced symbol.
These broken links caused the JavaDoc build to fail.
Bug: 8175766
Change-Id: I52fbef27825a25abca960cb44b59c2132267e9d6
By adding these stubs, they will be automatically added to framework.aidl
in sdk builds.
This makes it easier for unbundled apps to pass these objects across
AIDL calls.
ContentValues & CursorWindow are already public Parcelables. It is an
oversight that they were not already in framework.aidl.
There are a lot of other public Parcelables that are missing from
framework.aidl. This just fixes two commonly requested ones.
Change-Id: If61e19b1206da1680413d9ea03de87a90b6d233e
b/8631678
1.GeofenceRequest object created.
2.MonitorState moved to a new callback
3.getTypeAndStatus separated to 2 calls.
4.Binder death implemented
5.geofenceChange callback name changed.
6.Parameters rearranged in some calls.
Change-Id: I8fe9621186aeb49efeb0eef1821a2556afe03cfc
This is the best and only way for apps to listen for
notifications: create a NotificationListenerService, wait
for the NoMan to bind to you (as a result of the user
checking a box somewhere in Settings and agreeing to a
scary dialog box), and you'll start receiving notification
posted and dismissed callbacks. Your service, while enabled,
will also be able to clear one or all notifications.
Use this power wisely.
This change moves StatusBarNotification out of
com.android.internal into android.service.notification.
[Internal customers, including System UI and early users of
the system-only listener binder API, will need to be
updated.]
Bug: 8199624
Change-Id: I1be46f823d4b3ddc901109ec1e085cd6deb740c2
The input method manager service now supplies an input channel for
communication while creating an IME session on behalf of the
application.
This change significanly reduces the overhead of IME event dispatch
by using a standard input channel to send input events rather than
using binder. This results in fewer thread context switches
and fewer object allocations.
What's more, the IME may perform additional batching of the motion
events that it receives which may help it catch up if it is
getting behind while processing them.
Bug: 7984576
Bug: 8473020
Change-Id: Ibe26311edd0060cdcae80194f1753482e635786f
OBB backup/ restore is no longer handled within the target app
process. This is done to avoid having to require that OBB-using
apps have full read/write permission for external storage.
The new OBB backup service is a new component running in the
same app as the already-existing shared storage backup agent.
The backup infrastructure delegates backup/restore of apps'
OBB contents to this component (because the system process
may not itself read/write external storage).
From the command line, OBB backup is enabled by using new
-obb / -noobb flags with adb backup. The default is noobb.
Finally, a couple of nit fixes:
- buffer-size mismatch between the writer and reader of chunked
file data has been corrected; now the reading side won't be
issuing an extra pipe read per chunk.
- bu now explicitly closes the transport socket fd after
adopting it. This was benign but triggered a logged
warning about leaked fds.
(Cherrypicked)
Change-Id: I471f6348abcccb7bf1e1710b7beda9f23de53e14
OBB backup/ restore is no longer handled within the target app
process. This is done to avoid having to require that OBB-using
apps have full read/write permission for external storage.
The new OBB backup service is a new component running in the
same app as the already-existing shared storage backup agent.
The backup infrastructure delegates backup/restore of apps'
OBB contents to this component (because the system process
may not itself read/write external storage).
From the command line, OBB backup is enabled by using new
-obb / -noobb flags with adb backup. The default is noobb.
Finally, a couple of nit fixes:
- buffer-size mismatch between the writer and reader of chunked
file data has been corrected; now the reading side won't be
issuing an extra pipe read per chunk.
- bu now explicitly closes the transport socket fd after
adopting it. This was benign but triggered a logged
warning about leaked fds.
Bug: 6718844
Change-Id: Ie252494e2327e9ab97cf9ed87c298410a8618492
This is a class representing a window and providing limited
interaction with it, which can be handed across processes.
Change-Id: I22885f2064a9cc8c68d690a5858c2e28bbb6a0f3
- remove userActivity() from KeyguardService interface and call it
on PowerManager directly
- Split IKeyguardResult into two parts: IKeyguardShowCallback and
IKeyguardExitCallback.
- Misc other changes from the review.
Change-Id: I3f679cfa5d3f8bc742f2b2259ac354045e89a87b
This is in preparation to moving keyguard into its own process.
Moved keyguard source and resources into new .apk.
Got basic test app working. Still need to implement MockPatternUtils
and means to pass it into KeyguardService with local binder interface.
Added new ACCESS_KEYGUARD_SECURE_STORAGE permission.
Temporarily disabled USER_PRESENT broadcast.
Remove unintentional whitespace changes in PhoneWindowManager, etc.
Checkpoint basic working version.
Move to systemui process.
Synchronize with TOT.
Sync with recent user API changes.
Fix bug with returing interface instead of stub for IKeyguardResult. Create KeyguardServiceDelegate to allow
for runtime-selectable local or remote interface.
More keyguard crash robustness.
Keyguard crash recovery working. Currently fails safe (locked).
Fix selector view which was still using frameworks resources.
Remove more references to internal framework variables. Use aliases for those we should move but
currently have dependencies.
Allow runtime switching between service and local mode.
Fix layout issue on tablets where orientation was reading the incorrect constant
from the framework. Remove more framework dependencies.
Fix PIN keyboard input.
Remove unnecessary copy of orientation attrs.
Remove unused user selector widget and attempt to get multi user working again.
Fix multi-user avatar icon by grabbing it from UserManager rather than directly since
keyguard can no longer read it.
Merge with AppWidget userId changes in master.
Change-Id: I254d6fc6423ae40f6d7fef50aead4caa701e5ad2
