On 10/14/2014 10:19 PM, D M German wrote:
> Denis, is there a way to specify that you don't want compresses xoj
> files?
Alas not. This should be no big deal, but it'd require a wrapper for
fprintf()/gzprintf() to allow writing either in gzipped or uncompressed
format. (gzopen() can read uncom
Shuhao twisted the bytes to say:
Shuhao> Hey,
Shuhao> I'm curious to how the xournal line drawing algorithm works. Is there
a
Shuhao> document somewhere documenting its process? This algorithm is the best
Shuhao> I've seen from a couple of programs and I'm wondering how exactly it's
Sh
Shuhao Wu twisted the bytes to say:
Shuhao> Another question is how do you enabled efficient erasing? How is the
Shuhao> line segments stored so they can be efficiently looked up for erasing?
I have the feeling you are writing an application to do pen annotations
:)
--dmg
Shuhao> Thanks,
Denis Auroux twisted the bytes to say:
Denis> On 10/01/2014 05:20 PM, Shuhao Wu wrote:
>> I'm also impressed by the fact that the anti aliasing looks very good. I
>> assume this is handled by gnome
Denis> Yes -- by libgnomecanvas specifically (with the help of libart_lgpl
Denis> again).
Dear Shuhao,
It's not all that efficient in fact -- but each item (e.g. a pen stroke)
has a bounding box (i.e. the smallest rectangle containing it entirely)
that xournal keeps track of. So when one uses the eraser, xournal scans
through all items on the page (actually just the current layer) a
Another question is how do you enabled efficient erasing? How is the
line segments stored so they can be efficiently looked up for erasing?
Thanks,
Shuhao
On 10/01/2014 05:00 PM, Denis Auroux wrote:
> On 10/01/2014 05:20 PM, Shuhao Wu wrote:
>> I'm also impressed by the fact that the anti aliasin
On 10/01/2014 05:20 PM, Shuhao Wu wrote:
> I'm also impressed by the fact that the anti aliasing looks very good. I
> assume this is handled by gnome
Yes -- by libgnomecanvas specifically (with the help of libart_lgpl
again). Xournal doesn't do any antialiasing of its own.
Libgnomecanvas has so
Ah I was referring to the drawing with a pen process. That's was very
helpful.
I'm also impressed by the fact that the anti aliasing looks very good. I
assume this is handled by gnome and the fact that the line segment is so
small? (0.3px?)
Furthermore is pressure sensitivity data recorded per li
I'm not sure what you mean exactly by "line drawing algorithm". Do you
mean just the process of drawing with the pen?
If so: position data is received from the stylus or other input devices;
if there hasn't been enough motion since the last
point (by default 0.3 pixel) we discard the information
Hey,
I'm curious to how the xournal line drawing algorithm works. Is there a
document somewhere documenting its process? This algorithm is the best
I've seen from a couple of programs and I'm wondering how exactly it's
accomplished. Unfortunately my C skills are not as good and somewhat
rusty
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