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diff --git a/upstream/opensuse-tumbleweed/man1/ppmwheel.1 b/upstream/opensuse-tumbleweed/man1/ppmwheel.1 new file mode 100644 index 00000000..5a950991 --- /dev/null +++ b/upstream/opensuse-tumbleweed/man1/ppmwheel.1 @@ -0,0 +1,134 @@ +\ +.\" This man page was generated by the Netpbm tool 'makeman' from HTML source. +.\" Do not hand-hack it! If you have bug fixes or improvements, please find +.\" the corresponding HTML page on the Netpbm website, generate a patch +.\" against that, and send it to the Netpbm maintainer. +.TH "Ppmwheel User Manual" 0 "03 February 2019" "netpbm documentation" + +.SH NAME +ppmwheel - make a PPM image of a color wheel + +.UN synopsis +.SH SYNOPSIS + +\fBppmwheel\fP +\fIdiameter\fP +[{\fB-huevalue\fP | \fB-huesaturation\fP}] +[\fB-maxval=\fP\fIN\fP] + + +.UN description +.SH DESCRIPTION +.PP +This program is part of +.BR "Netpbm" (1)\c +\&. +.PP +\fBppmwheel\fP produces a PPM image of a color wheel of the +specified diameter inside a white square just large enough to hold it. +.PP +The color wheel is based on the HSV color model. Hues are distributed + angularly around the circle and the values and saturations are distributed + radially. +.PP +You can generate three kinds of color wheel: + +.IP \(bu +Hue-value: Select this with a \fB-huevalue\fP option. +.sp +The saturation is 100% everywhere. The value goes from zero to 100% + linearly, from the center of the wheel to the edge. So the center is black. +.sp +Hence, the image consists of all of the secondary colors based on the + red, green, and blue primary colors. A secondary color is one that is + composed of light of at most two of the three primary colors. + +.IP \(bu +Hue-saturation: Select this with a \fB-huesaturation\fP option. +.sp +The value is 100% everywhere. The saturation goes from zero to 100% + linearly, from the center of the wheel to the edge. So the center is white. + +.IP \(bu +Ppmcirc: Select this by not specifying any other wheel type option. +.sp +The saturation is 100% everywhere. The value is a strange function of + the distance from the center, increasing as the square root of the distance + until halfway out, then decreasing as the 8th root of the distance the rest + of the way. We don't know what the point of this is, but it is what the + program Ppmcirc by Peter Kirchgessner in 1995 does, and was the only option + in \fBppmwheel\fP from its inception in 2003 to 2019. + + + + +.UN arguments +.SH ARGUMENTS +.PP +You must specify one non-option argument: the radius of the color wheel +in pixels. +.PP +This is also the height and width of the output image. + + +.UN options +.SH OPTIONS +.PP +In addition to the options common to all programs based on libnetpbm +(most notably \fB-quiet\fP, see +.UR index.html#commonoptions + Common Options +.UE +\&), \fBppmwheel\fP recognizes the following +command line options: + + +.TP +\fB-huevalue\fP + +This selects a hue-value color wheel. +.sp +This option was new in Netpbm 10.86 (March 2019). + +.TP +\fB-huesaturation\fP + +This selects a hue-saturation color wheel. +.sp +This option was new in Netpbm 10.86 (March 2019). + +.TP +\fB-maxval=\fP\fIN\fP + +This selects the maxval for the image. The default is 255. +.sp +This option was new in Netpbm 10.86 (March 2019). + + + + +.UN seealso +.SH SEE ALSO +.BR "ppmcie" (1)\c +\&, +.BR "ppmrainbow" (1)\c +\&, +.BR "ppm" (5)\c +\& + +.UN history +.SH HISTORY +.PP +\fBppmwheel\fP was added to Netpbm in Release 10.14 (March 2003). + + +.UN author +.SH AUTHOR + +Copyright (C) 1995 by Peter Kirchgessner +.SH DOCUMENT SOURCE +This manual page was generated by the Netpbm tool 'makeman' from HTML +source. The master documentation is at +.IP +.B http://netpbm.sourceforge.net/doc/ppmwheel.html +.PP
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