[Xastir-dev] feasibility of extra drawing threads?

[Gerry Creager N5JXS]

Part of the problem is looking in the index to determine what to draw 
again... and next.  Simply keeping a cache of the file names to _redraw_ 
(in other words, those that are already in memory and could be redrawn 
cheaply) *plus* those adjacent to the current ones, would effect an 
improvement.

gerry

Derrick J Brashear wrote:
> On Sat, 25 Sep 2004, Gerry Creager N5JXS wrote:
> 
>> Aha!  So when I proposed this a couple of years ago and confused Curt, 
>> I wasn't completely crazy?
> 
> 
> Well, waiting for the map redraw is annoying when you're coming up on an 
> interchange and want to see what's there.
> 
> Really, if there were ways to tell a thread to draw a map of scale blah 
> centered at blah into a pane, and a way to swap that pane as the active 
> one, i could write the glue to make the predictive crap work.
> 
> 
>> :-))
>>
>> Gerry
>>
>> Derrick J Brashear wrote:
>>
>>> As I was moving across Ohio at highway speed, and zoomed to level 16 
>>> on a set of 1:24k USGS DRGs, I had a thought: a predictive drawing 
>>> thread or threads which prepared what would be the next screen image 
>>> if the autopanning moved you in the direction the cursor is most 
>>> likely to go off the screen in next.
>>>
>>> I can probably do the math to figure out what we should be drawing 
>>> and by when, I don't think I can figure out how to draw an alternate 
>>> image into an alternate pane. how feasible is this?
>>>
>>> _______________________________________________
>>> Xastir-dev mailing list
>>> Xastir-dev at xastir.org
>>> https://lists.xastir.org/mailman/listinfo/xastir-dev
>>
>>
>> -- 
>> Gerry Creager -- gerry.creager at tamu.edu
>> Network Engineering -- AATLT, Texas A&M University    Cell: 
>> 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
>> Page: 979.228.0173
>> Office: 903A Eller Bldg, TAMU, College Station, TX 77843
>>

-- 
Gerry Creager -- gerry.creager at tamu.edu
Network Engineering -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843