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
