agg changes

[Steve Lime]

That was going to be my suggestion too. We could pull now if that makes the most
sense.

Steve

>>> On 8/27/2007 at 10:08 AM, in message <46D2E8EB.6050709 at frii.com>, Sean Gillies
<sgillies at FRII.COM> wrote:
> Stephen Woodbridge wrote:
>> thomas bonfort wrote:
>>> hi devs,
>>> I've commited a few changes to the agg rendering logic, which greatly 
>>> increase performance when drawing many shapes. what's changed is that 
>>> the imageObj now holds a pointer to the rendering object and all it's 
>>> dependencies, instead of recreating them nearly from scratch each time a 
>>> shape is drawn.
>>> on the "ntdb_roads_50" from a recent osgeo-discuss post
>>> before: 1.1seconds
>>> after: 0.5 seconds
>>>
>>> this is still much more than what gd does, but getting closer (that 
>>> particular test file is probably a worst case scenario when comparing 
>>> rendering times: many tiny line segments that just show up as a pixel 
>>> with gd, but all have to be antialiased in agg)
>>>
>>> all this to say that I don't think there should be much breakage arising 
>>> from this, but I'd appreciate if all of you who are set up to test agg 
>>> could give the new version a run and report if anything weird is happening.
>>>
>>> thanks,
>>> thomas
>> 
>> Thomas,
>> 
>> This is built with SVN revision 6709.
>> 
>> 
> http://imaptools.com/cgi-bin/mapserv-4.99?mode=map&map=/u/data/test/spiral.map 
> 
>> 
> http://imaptools.com/maps/compare-maps2.php?loc=1&ll=42.61935+-71.38918&address 
> =&city=le+paso&state=tx&zipcode=&country=&asrv=1&amf=%2Fu%2Fdata%2Fmaps%2Fgoogle-aa
> 2.map&msa=mapserv-4.10&bsrv=1&bmf=%2Fu%2Fdata%2Fmaps%2Fgoogle-agg.map&msb=mapserv
> -4.99&submit=Show
>> 
>> I noticed that the endcaps of fat lines used to be rounded like GD, but 
>> now it abruptly ends. look at the ends of the test spiral and the roads 
>> on the bottom of the side by side comparison.
>> 
>> Also, You meantioned a while back that some or all of the cartoline 
>> endcap styles worked with AGG, could you review for me and the doc team 
>> what the keywords are and how to include them in the AGG layer definition.
>> 
>> Thanks,
>>    -Steve W
>> 
> 
> Seems to me that AGG would make it possible to do away with the 
> cartoline stuff, right? It was only ever a hack to overcome weaknesses 
> of GD anyway, and became poorly supported over time.
> 
> Sean