Marlin-Renderer and JavaFX

[Felix Bembrick]

> On 10 Nov. 2016, at 10:27, Jim Graham <james.graham at oracle.com> wrote:
> 
> On 10/20/16 5:34 AM, Kevin Rushforth wrote:
>>> For now the OpenPiscesRasterizer class uses a static Renderer (single
>>> instance) so it is single-threaded.
>>> 
>>> In MarlinFX I could prepare the multi-threading support by using 1
>>> RendererContext per thread (ThreadLocal) as I did in Marlin for java2d.
>>> 
>>> However it seems a complex task to enable parallelization in the javafx
>>> pipeline but I could help there also...
>>> 
>> 
>> Enabling parallel rasterization seems like a good follow-on task, but is out of scope for the short term given the
>> limited amount of time. Also, the only way that MarlinFX even has a chance of getting approved for in JDK 9 is for the
>> default OpenPisces path to be unaltered.
> 
> Also, such a parallelization of the javafx pipelines would be a fairly large task.
> 
> I would think an effort to parallelize a single shape rasterization would be much simpler in scope.  Still outside the current JDK 9 timeline, but definitely something that could help in future releases.  I believe that once we put the edges into the internal structures we could parallelize the rasterization of individual scanlines and maybe break a tall shape up into N horizontal bands for N threads.  Other thoughts would be a thread to generate the crossings and N threads to populate the alphas...?
> 
>            ...jim