[cairo] fill exact pixels

[Andreas Lobinger]

Hello colleagues,

i'm (not alone) trying to build a regression test and it would be nice
to build the test like drawing something to a image surface and
compare the bitmap (with the target).

Can i assume that i get exactly filled pixels with

* drawing lines with
* linewidth as even integer
* coordinates (transformed) as integers
* CAIRO_LINE_CAP_SQUARE?

So avoiding any anti-aliasing.

Wishing a happy day,
          Andreas