Red Hat Bugzilla – Bug 154440
HPLIP black color support
Last modified: 2007-11-30 17:11:03 EST
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User-Agent: Mozilla/5.0 (compatible; Konqueror/3.4; Linux) KHTML/3.4.0 (like Gecko)
Description of problem:
it would be great for all users with hp printer if we could add a patch to
ghostscript gdevijs to support krgb:
Â Added KRGB support. HPIJS now supports two color spaces RGB and KRGB. KRGB
provides image enhanced printing for black text and black line drawings which
can not be done with current RGB based raster drivers.
1. K=1-bit black plane, RGB=24 bit color raster.
2. K-plane will only contain objects that are black text and black line
3. RGB raster will not contain K-plane objects.
4. K resolution and RGB resolution will be equal.
5. K-plane will be byte aligned.
6. K-plane bit definition; 1=black, 0=white.
KRGB requires Ghostscript suppport. Current versions of Ghostscript do not
support KRGB. In order to support KRGB, a Ghostscript KRGB patch is included
in the HPIJS package. The patch modifies the IJS client in Ghostscript and is
free to use under the MIT license. The new IJS client should be backward
compatible with existing IJS servers. This means KRGB support is optional.
Use the following command in the Ghostscript source directory to apply the
KRGB patch, then rebuild Ghostscript.
$ patch -p0 < gdevijs-krgb-1.0.patch
Version-Release number of selected component (if applicable):
Steps to Reproduce:
This patch is already incorporated into ESP gs 8.15rc3.