[RFC wayland] protocol: Add wl_surface.buffer_damage

[Jasper St. Pierre]

I don't see where. I see eglSwapBuffersWithDamage still looking like
it shoves the rects across the wire in buffer space, without any
modification.

http://cgit.freedesktop.org/mesa/mesa/tree/src/egl/drivers/dri2/platform_wayland.c#n705

I checked the Mali driver implementation I have, and it does something similar.

On Sat, Nov 7, 2015 at 2:32 AM, Daniel Stone <daniel at fooishbar.org> wrote:
> On 6 November 2015 at 19:08, Jasper St. Pierre <jstpierre at mecheye.net> wrote:
>> To help clear things up, I think we should deprecate the
>> wl_surface.damage request and document that the coordinates are
>> effectively undefined -- for legacy reasons, if you see
>> wl_surface.damage, it should be considered a damage for the entire
>> surface.
>
> Why? Mesa fixed that bug two years ago, I don't know of a non-Mesa EGL
> implementation with that bug, and non-EGL clients are perfectly
> capable of implementing it correctly themselves. Whilst introducing
> buffer_damage, we could obliterate surface damage out of spite, but
> that seems like a giant middle finger to everyone who wrote conformant
> and performant apps, and now gets their entire buffer smashed through
> TexImage2D every time they want to blink a cursor.
>
> Cheers,
> Daniel



-- 
  Jasper