Restore untrusted glStencilMask value on resume after functor

Fixes an issue where the stencil buffer is corrupted
(used in overdraw debugging, path clipping) when used in
conjunction with a HW accelerated WebView.

bug:15023700
bug:16465551

Change-Id: If201b503931380f7107a34e9a9a2f877a50f72b1
Optimize drawBitmapMesh using TRIANGLE_STRIP

Draw BitmapMesh using STRIP instead of TRIANGLES.
Depending on where the bottleneck is located in the pipeline,
there is a potential for saving two-thirds of the time spent rendering.
The speedup is due to avoiding redundant operations,
i.e., mapping each vertex four times to texture and color attribute,
sending each vertex twice to the GPU, vertex processing of GPU ...

In this patch:
1. Refactoring mesh using Strip.
2. Batch triangles by adding degenerate triangles.
3. Optimize computing positions of texture and color attribute.

Benchmark: Drawing Bitmap(1152x768 px) with 200x200 meshes
Performance is doubled (from 26.4 fps to 53 fps, Nexus10).
Memory footprint: only 17% of original method.
(from 240000 to 40401 vertices with xy, uv, rgba data.)

Change-Id: I08c5c20d981d88528ce7b02012feefae468d6ec4
Signed-off-by: kui.zheng <kui.zheng@arm.com>
Keyguard: update correctly track title and info if screen turns on

AOSP issue - Force update both if screen turns on.

Change-Id: I3d3198534c3ccdaa0ad2f40a967cc092a7dc0a0c
Fix problem where PhoneWindowManager waits for keyguard to draw

This fixes a problem where PhoneWindowManager times out waiting
for keyguard to draw when it's disabled.  Instead, we pass a null
token back which allows PhoneWindowManager to continue.

Fixes bug 11190932

Change-Id: I041ea1d88dca681476d9477a3aab54559976b312
Keyguard: We need to ensure that keyguard is showing as well to set the token

Google fix

https://github.com/SlimRoms/frameworks_base/commit/021806ec33f5f59567f3bb3af135b2a1d88c0951

fixes what it is meant to fix.

But still we need to ensure if the keyguard eg is disabled by 3rd party
apps or the keyguard is not showing due of other reasons to inform PhoneWindowManager over the token
not to wait to draw for the Keyguard and go ahead.

Fix:
Just check for isShowing in addition to the check if KeyGuard is disabled

Change-Id: I5f017a6ccebf12dc717fb6d44802a1c1fee15abc
Solve three memory leaks related to PatchCache

A Patch can be fairly large, holding bitmap data, but
is also frequently leaked which adds to the severity.
The feature is used in many important processes such
as Home, SystemUI and Chrome.

The following leaks are solved:

1. The Patch itself was not always freed.
PatchCache::removeDeferred() can mark patches to be
cared for by PatchCache::clearGarbage(). But
mCache.remove() would only destroy the container
and the pointer, not the Patch object itself.

2. The vertices stored in the Patch at Patch::createMesh()
would always leak. The empty/default destructor in Patch
would not properly destroy "vertices" since it's just a
pointer.

3. A BufferBlock that's added to the mFreeBlocks
in PatchCache could leak. The leak happened when a
patch later needed the entire free block, because the
object was removed from the list but never deleted
in PatchCache::setupMesh().

Change-Id: I41e60824479230b67426fc546d3dbff294c8891f
Signed-off-by: houst0nn <houstonn@gmail.com>
libhwui: Fix a native crash with patch caching

This commit makes the system silently deal with requests to remove
patches that have already been tagged for removal instead of dumping.
The garbage collector method (PatchCache::clearGarbage) should deal
with getting rid of this patch at a later date regardless since it
has already been added to the garbage array.

Fixes AOSPA-835.

Change-Id: I9bd801926bc5de5cdb0324c9ddeb91bd8bbfe155