[cairo] PATCH cairo-www: Simpler explanation for how to get sharp, single-pixel-wide lines

Guillermo Rodriguez guillerodriguez.dev at gmail.com
Thu May 18 10:25:56 UTC 2017

2017-05-18 12:17 GMT+02:00 Lawrence D'Oliveiro <ldo at geek-central.gen.nz>:
> On Thu, 18 May 2017 11:03:28 +0200, Guillermo Rodriguez Garcia wrote:
>> 2017-05-18 9:24 GMT+02:00 Lawrence D'Oliveiro:
>>> On Thu, 18 May 2017 09:08:16 +0200, Guillermo Rodriguez Garcia
>>> wrote:
>>>> ... but unless you are writing an application that ONLY draws
>>>> vertical and horizontal straight lines (which doesn't seem to be
>>>> very common) it is pretty obvious that whoever has this problem
>>>> would like to have a solution that does not affect everything
>>>> else.
>>> Which I addressed in my answer--please read it again.
>> Nothing to add on my side.
> In which case, let me quote myself:
>     The drawback is that, if your lines are not exactly vertical or
>     horizontal, you will get horrible “jaggies”. This is why
>     antialiasing is on by default, and should be left that way for most
>     text and shape drawing. To restore the default, end your aliased
>     drawing sequence with
>         cairo_set_antialias(cr, CAIRO_ANTIALIAS_DEFAULT);
> So the question becomes: do you actually have a point that I haven’t
> already addressed in my answer?

Sure. It's just that I am tired of repeating it over and over. Here is
a summary:

"In my opinion, the current answer is much more useful than your
proposed alternative"

As I said you don't need to convince me. I just wanted to state my
opinion on the list.


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