Support external display rendering in vr flinger
Add support for external displays to vr flinger, hidden behind a system
property until we're ready to use it. To turn it on for testing:
$ adb shell setprop persist.vr.use_external_display 1
With external display support turned on and an external display
connected, all output is redirected to the external display, and we
switch to the external display's vsync.
Bug: 75047963
Test: Most of the testing was done on a Polaris, which now supports
external display hotplugging.
- Tested external display connect/disconnect while the device was
donned.
- Tested external display connect/disconnect while doffed.
- Verified booting with the external display connected doesn't cause the
device to crash, although we don't seem to get a hotplug event for the
external display until the cable is disconnected and reconnected, so
we output to the primary display at first.
- Did some basic testing on a Walleye to confirm vr behavior there is
unchanged.
- Verified the external display is ignored when the sysprop is unset.
Change-Id: I3d3f40e276d354551fc1c577b9392709398ad96e
diff --git a/libs/vr/libvrflinger/Android.bp b/libs/vr/libvrflinger/Android.bp
index 3e4a42c..4dc669b 100644
--- a/libs/vr/libvrflinger/Android.bp
+++ b/libs/vr/libvrflinger/Android.bp
@@ -72,6 +72,7 @@
srcs: sourceFiles,
export_include_dirs: includeFiles,
+ clang: true,
cflags: [
"-DLOG_TAG=\"vr_flinger\"",
"-DTRACE=0",
@@ -83,6 +84,9 @@
"-Wno-error=sign-compare", // to fix later
"-Wno-unused-variable",
],
+ cppflags: [
+ "-std=c++1z"
+ ],
shared_libs: sharedLibraries,
whole_static_libs: staticLibraries,
header_libs: headerLibraries,