201c7d91b7
Adds GRALLOC_USAGE_FOREIGN_BUFFERS, which a consumer may set as a usage flag if it intends to attach buffers that it has not detached from the BufferQueue. It provides a hint to the producer (who may query the consumer usage bits) that it may receive a buffer from another BufferQueue, so that it can exit during initialization, hopefully with a meaningful error message, if such buffers are not supported. Also adds GRALLOC_USAGE_ALLOC_MASK, which is applied to usage bits before calling alloc on the gralloc module, and prevents the module from seeing GRALLOC_USAGE_FOREIGN_BUFFERS, since that usage flag is of no use while allocating buffers. Bug: 19801661 Change-Id: I17b927de94245f4df7cfd3f4483b544da3e9cd35