195681 - Visibility check fails for BeOS - DrawTile is called for really obscured areas

Status: RESOLVED INVALID

(Core Graveyard :: GFX: BeOS, defect)

Description

[Sergei Dolgov]

DrawTile is not so effective on BeOS currently (IMHO this is at all not best
idea to render background in OffscreenImage->ToScreen way), and if it is called
permanently triggered by all repaint events, it is absolutely catastrofic for
such sites as www.nbc.com.
Second good illustration - if to drag some object over big scrollbar knob -
Mozilla still causes scrollbar background pattern re-rendering, inspite dragging
occurs over invisible (obscured by knob) background area.

Though, in general, repaint area (and so Tile to repaint) are detected correctly.

Comment 1

[Boris Zbarsky [:bzbarsky]]

.

Comment 2

[Sergei Dolgov]

Boris, currently i'm unsure that this bug should be assigned to BeOS port
mantainer. Until someone helps me to understand mechniscs of this visibility
check. As far as i understand, layout engine handles information about z-order,
parent-child relations and regions itself, outside port-code (widget or gfx)

Comment 3

[Paul]

Sergei, as you have a better understanding of the gfx code for BeOS, I am going
to change the assignment of this bug to you.  If that's a problem, set it back
to me.

Comment 4

[tqh]

This one is fixed isn't it?

Comment 5

[Sergei Dolgov]

No, it didn't.
I think it is rather meta-bug.
Partly related to generic gecko-problems:
http://wiki.mozilla.org/index.php/Gecko:Invalidation_Handling
http://wiki.mozilla.org/index.php/Gecko:Frame_Painting

Comment 6

[Joe Drew (not getting mail)]

We don't support BeOS any more.

Comment 7

[JP Rosevear [:jpr]]

In the graveyard, code referred to doesn't exist to be fixed.