[cairo] understanding _cairo_path_fixed_fill_extents()

Enrico Weigelt, metux IT consult enrico.weigelt at gr13.net
Sat Dec 19 10:13:32 PST 2015

On 19.12.2015 11:11, Uli Schlachter wrote:

> I don't really know, but I wonder: Why would the points be the other >
way around? I guess path->extents.p1 is defined to be the north west
> corner and it can only be south or east of p2 due to rounding issues
> somewhere?

It that really the case ? Can we be sure about that ?
(honestly, I have no idea :()

> So based on a definition of "p1 is the north-west corner", I think this function
> does exactly the right thing. If this every is a problem, the code generating
> this bogus extents should be fixed.

Okay, do have that definition scribed in stone ? If not, should we do
that ?

I agree that such an definition might be helpful, but there *might* be
cases where it's turned around. How can we detect those cases (and
find the responsible code) w/o too much overhead ? Maybe some


Enrico Weigelt,
metux IT consulting

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