[OpenJDK 2D-Dev] Merging marlin & pisces rendering engines

[Clemens Eisserer]

Hi,

I would like to add that, beside higher performance for rasterization,
Marlin's capability to produce tiles larger than 32x32px also improves
the performance with the XRender pipeline für larger antialiased
shapes a lot.
For modern drivers uploading 32x32 small coverage masks is more
expensive than uploading the additional "empty" areas caused by larger
masks.

Marlin could help to improve the XRender pipeline's weakest spot - in
this case the results of the diagonal line (worst case for larger
coverage masks) test of J2Bench are shown:

graphics.opts.sizes=100:
mask256: 3202.226720 (var=33.64%) (100.0%)
mask32: 477.4535809 (var=3.01%) (14.91%)
stock: 479.0772966 (var=5.82%) (14.96%)

At least on this machine the optimal mask size is somewhere between
64^2 and 128^2 pixels.

Regards, Clemens