Add hw.gpu.enabled hardware property

This patch adds a new hardware property to enable GPU emulation
(named hw.gpu.enabled). It is currently disabled by default.

It also modifies the UI code to display the GL output properly
inside the UI window. And sets the kernel parameter qemu.gles
to either 0 or 1 to indicate to the guest system's GLES libraries
whether to use GPU emulation or fallback to the software renderer.

A future patch will also add auto-detection of desktop GL capabilities.
For example, if the emulator is started on a headless server without
an X11/GL display, hw.gpu.enabled will be forced to 'no', forcing the
guest to use the software renderer.

Another patch will allow to change the property from the command-line
for debugging purpose.

NOTE: If you want to test GPU emulation, change the default value of
      the property in android/avd/hardware-properties.ini from 'no'
      to 'yes'. You will need to run a ToT master AOSP tree with
      the following pending patches applied:

      https://review.source.android.com/25797
      https://review.source.android.com/25154
      https://review.source.android.com/25759

Change-Id: I1fa3512be24395244fd5068f2bf59ad54db5c7d5

1 files changed, 8 insertions, 0 deletions

diff --git a/android/avd/hardware-properties.ini b/android/avd/hardware-properties.ini
index 0e650bb..e7eb445 100644
--- a/android/avd/hardware-properties.ini
+++ b/android/avd/hardware-properties.ini
@@ -224,6 +224,14 @@ default     = yes
 abstract    = LCD backlight
 description = Enable/Disable LCD backlight simulation,yes-enabled,no-disabled.
 
+# Hardware OpenGLES emulation support
+#
+name        = hw.gpu.enabled
+type        = boolean
+default     = no
+abstract    = GPU emulation
+description = Enable/Disable emulated OpenGLES GPU
+
 # Maximum VM heap size
 # Higher values are required for high-dpi devices
 # Default will depend on RAM size.