[PATCH] linux-dmabuf: send deprecated format events

[Daniel Stone]

Hi Michael and Philipp,

On 15 December 2017 at 09:25, Philipp Zabel <p.zabel at pengutronix.de> wrote:
> Although the format event is deprecated, some clients, especially the
> GStreamer waylandsink, only support zwp_linux_dmabuf_v1 version 1 and
> require the deprecated format event.
>
> Send format events instead of the modifier event, if the client binds on
> a protocol version before version 3, skipping formats that only support
> non-linear modifiers.

Thanks for this! Could I please persuade you to take on one additional
change though?

Specifically, if has_dmabuf_import_modifiers is not supported,
gl-renderer will return 0 for num_formats. In this case, it seems like
we should send a conservative list: ARGB8888, XRGB8888, and maybe
speculatively the YUV formats we have hardcoded conversions for
(provided we have R8/RG8 support, cf. the patches from Arnaud).

Cheers,
Daniel