Nice tip Thomas!!!
Thanks
2014-10-08 14:27 GMT-03:00 Thomas Rognon <tcrog...@gmail.com>:
> Another way is to get it from the ConOut device path. There's a UEFI
> variable called "ConOut" (refer to UEFI spec) that holds a device path.
> Doing a LocateDevicePath() with gEfiGraphicsOutputProtocolGuid and this
> device path gives you the handle to GOP that ConOut is using. Just
> OpenProtocol() with this handle to get the GOP instance.
>
> On Wed, Oct 8, 2014 at 11:17 AM, Rafael Machado <
> rafaelrodrigues.mach...@gmail.com> wrote:
>
>> Hi J. E.
>>
>> Just one question.
>> Are you sure that this GOP you are using is handled by the current active
>> graphic device ?
>>
>> I'm asking this because some time ago I had one problem like this, and
>> the situation was that my system had two gop handles, but the first one
>> that was detected was not related to the active device.
>>
>> To check this I used the Edid protocol.
>>
>> Thanks and Regards
>> Rafael R. Machado
>>
>>
>> 2014-10-03 3:15 GMT-03:00 J. E. <nszero...@hotmail.com>:
>>
>>> BltLibVideoToBltBuffer seems to be unreliable on some PC's. Most work
>>> fine, but a select few return black pixels, no errors. EFI_STATUS =
>>> EFI_SUCCESS.
>>>
>>> If BltLibVideoToBltBuffer returns black pixels does that mean the
>>> hardware/firmware doesn't support screen-to-buffer functionality?
>>> I assume this is because someone didnt test the function or feel the
>>> need to implement the function in the BIOS code or GOP driver, rather than
>>> a GOP handle issue.
>>>
>>>
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>>
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