Clarification about surfaces in Gtk 2.6 and 2.10

[Raju S N <rajusn huawei com>]

Hi all,

I am familiar with Gtk2.6 version code. We have plans to migrate to 2.10. 
In 2.6, it was not mandatory to use cairo. Now I see that Cairo is an
integral part of 2.10.
Can I know how the approach is changed from 2.6 to 2.10 in the case of
handling surfaces ?
And how the migration happened in GdkDraw, gdkpixmap, gdkwindow, gdkdrawable
to use cairo
How cairo_surface_t structure is used during rendering text, image, etc ?
Please clarify this.

Thanks
Raju S N

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