mirror of https://github.com/GNOME/gimp.git
1590cecfe1
2000-05-22 Michael Natterer <mitch@gimp.org> * plug-ins/*: s/gimp_plugin_help_func/gimp_standard_help_func/ Coincidentially, my script also removed empty lines from the end of _all_ *.c file (not only from those which contained gimp_plugin_help_func). |
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| Makefile.am | ||
| README | ||
| gimp_color_window.c | ||
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| print-pcl.c | ||
| print-printers.c | ||
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| print.c | ||
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README
Print plugin for the Gimp. Version 3.0.6 by Robert Krawitz <rlk@alum.mit.edu> based on version 2.0 by Michael Sweet <mike@easysw.com>. This version has numerous enhancements: 1) Full support for the Epson Stylus Photo, Photo 700, and Photo EX printers, including 6-color printing, 1440x720 dpi resolution, and "soft" weave for much faster high quality printing. 2) Many new controls, including: * Output gamma adjustment * Contrast * Red/green/blue levels * Saturation * Density * Additional scaling options 3) Improved tonal resolution. Calculations are now done in 16 bit rather than 8 bit resolution, which eliminates stair stepping. Input levels do not map one to one onto output levels, so in 8 bit output resolution multiple input levels will map to a single output level. Usually the density range is compressed in the light end of the tonal range, so many different input levels will map to one output level. Use of 16 bit output resolution avoids this undesirable behavior and results in smooth tonal gradations in highlights. 4) Saving of all settings between print jobs. This plugin has been optimized for the Epson Stylus Photo EX, since that's the printer I own. I am interested in comments on performance both with Epson Stylus printers and with others. Some tips on tuning the output: * Start with the default settings * Brightness and density are not the same thing. Density is a purely linear adjustment; more density means more ink. Brightness affects perceived brightness. * Higher gamma values result in brighter images with compressed highlights. Lower gamma values are darker, but with better tonal range in the highlights. * Different brands of ink yield different results. I've found that third party inks on Epson printers are generally too cyan. The correction for excessive cyan is to add red (or reduce blue and green). * I've found that what creates good test patterns does not necessarily create good photographs. In particular, test patterns often print well with gamma of .6 or thereabouts, but that gives washed out photographs. Perhaps when I implement a better contrast control this can be improved. * The contrast control scales polynomially around the midpoint of the range. Lower contrast will reduce the contrast in the midtones, but increase the contrast in the highlights and shadows. Contrariwise, a high contrast value will stretch the scale in midtones, compressing the highlights and shadows. * There are many combinations of brightness, gamma, and density that will create acceptable images. You may find that you want different settings for different images. * One group of settings you might want to start with is: Brightness 45 Gamma 1.5 Contrast 105 Saturation 1.4 Density 0.8 Makefile.standalone enables you to build this plugin as a standalone plugin, without reference to a Gimp source tree. Enjoy! -Robert Krawitz, January 13, 2000