[cairo] [RFC] Add device_extents api

[Behdad Esfahbod]

Jeff Muizelaar wrote:
> On Tue, Feb 03, 2009 at 02:46:20PM -0500, Behdad Esfahbod wrote:
>> Jeff Muizelaar wrote:
>>> On Tue, Feb 03, 2009 at 12:25:48PM -0500, Behdad Esfahbod wrote:
>>>> Jeff,
>>>>
>>>> The current implementation is broken indeed, and we plan to fix it. 
>>> How do we plan on doing this?  I don't know if we can just change the
>>> current implementation as that will likely break all the applications
>>> that currently use it. For example, if, like moonlight, you switch to an
>>> identity matrix before getting the extents and expect to get the device
>>> extents we can't just start returning the user space extents because
>>> they'll be too small.
>> Huh?  If matrix is identity, the broken and ideal extents are the same.
>> Either I'm missing something huge or you're talking about something else.
>> This problem can be fixed and doesn't need new API.
> 
> Yep, when the matrix is identity they're the same, but what should you
> get if the matrix isn't identity?

The tight bounding box, in user space.  Currently what we return isn't tight,
and that's incorrect.

behdad

> -Jeff
>