521255 - Force offscreen surfaces to be image surfaces

Status: RESOLVED WONTFIX

(Core :: Graphics, defect, P2)

Description

[Doug Turner (:dougt)]

Attachment: force offscreen image surfaces

For some plugins (eg. flash on maemo), we can post events passing an image buffer to the plugin and it will paint directly into that.  in order to facilitate this, the offscreen buffers that need to be image surfaces.

We might want to roll this into a XSHM patch, but that isn't strictly needed to support image only offscreen surfaces.

Comment 1

[Doug Turner (:dougt)]

Attachment: patch v.2 (uses the mobile opt #define)

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Erm.. if you do this, you make all sorts of things image surfaces, and kill any potential for render accel or straight Xlib-Xlib copying; this includes the backing buffer for <canvas>.  That doesn't seem to be what you'd want; why not just create an image surface for the plugin buffer?  Or, better yet, create an X Image/XShm thing so you can get fast blitting to Xlib surfaces?

Comment 3

[Joe Drew (not getting mail)]

Wontfix = not a blocker.