Bug 695073

Summary: Need fast image threshold dithering for depth > 1
Product: Ghostscript Reporter: Ray Johnston <ray.johnston>
Component: Graphics LibraryAssignee: Robin Watts <robin.watts>
Status: CONFIRMED ---    
Severity: enhancement    
Priority: P2    
Version: master   
Hardware: All   
OS: All   
Customer: Word Size: ---

Description Ray Johnston 2014-02-26 11:29:06 UTC 
A potential customer is using -dGrayValues=16, but with color images, the
gxht_thresh.c code doesn't work. A patch:
30f2c65 Disable threshold array based image optimization for depth > 1.
fixes the incorrect output, but the enhancement would improve performance.
Printers with bit depths > 1 are fairly common.

First seen from potential customer with J8.ps (JEITA test file) that has
a large image.