[Bf-cycles] Render to memory buffer

[Guillaume Chéreau]

> On Sun, Mar 18, 2018 at 2:08 PM, Brecht Van Lommel
> <brechtvanlommel at pandora.be> wrote:
>> Something
>> like this:
>>
>> thread_scoped_lock display_lock(session->display_mutex);
>> if(session->display->draw_ready()) {
>>     uint width = session->display->draw_width;
>>     uint height = session->display->draw_height;
>>     uchar4 *pixels = session->display->rgba_byte.data();
>>     ... do something ...
>> }

OK! Somehow I thought this wasn't correct since display_mutex is
marked as protected, which made me assume that it was important to
actually call session->draw.
This is much simpler indeed, thanks.

- gui