Bug 695073 - Need fast image threshold dithering for depth > 1
Summary: Need fast image threshold dithering for depth > 1
Status: CONFIRMED
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Graphics Library (show other bugs)
Version: master
Hardware: All All
: P2 enhancement
Assignee: Robin Watts
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-02-26 11:29 UTC by Ray Johnston
Modified: 2020-03-07 18:06 UTC (History)
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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.