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A gralloc extra HAL to retrive buffer detail information.
WHAT IT DOES?
=============
libgralloc_extra.so provide a convenience API for retriving the buffer_t
information, such as width, height, real format, raw buffer handle and more
extra share space for MTK's HWC, Video, and Camera.
HOW IT WAS BUILT?
==================
It needs the following library from AOSP:
1. libhardware
2. libcutils
3. libutils
HOW TO USE IT?
==============
See the usage of gralloc_extra_* at ./tests/
gralloc_test.cpp
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