[Mesa-dev] [PATCH 1/2] gbm: Introduce a new API gbm_bo_create_from_name.

[zhigang gong]

On Thu, Dec 15, 2011 at 11:57 PM, Eric Anholt <eric at anholt.net> wrote:
> On Thu, 15 Dec 2011 17:58:45 +0800, zhigang.gong at linux.intel.com wrote:
>> From: Zhigang Gong <zhigang.gong at linux.intel.com>
>>
>> Glamor need a function to create a texture from a
>> BO allocated by using libdrm directly in DDX layer.
>> EGL image extension API eglCreateImageKHR does support
>> this function, but that extension only support one
>> colore format - ARGB32 which is not sufficent for
>> us. I discussed this in the mail list and KRH suggest
>> me to extent GBM to support more color formats should
>> be better. I took his advice and decide to use gbm
>> bo to create image. Now before extent the color formats,
>> I have to add a new API to the create a gbo from a
>> name. This commit is for that purpose.
>
> If the DDX is going to be doing the memory management, then the DRI
> driver needs to be using the same bufmgr struct and DRI fd as the DDX so
> you can share the handle (and thus the mapping and userland caching)
> instead of the name.
Looks better than just create an image from the name as the DDX and DRI
are really running in the same process in this case. But I don't know how to
share the DDX's bufmgr with DRI driver, and how to make a texture from
a handle directly by using the EGL/GBM interfaces. Can you give me more hints
about how to achieve that?  Thanks.

>
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