\ .\" 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 "Pamtowinicon User Manual" 1 "12 April 2013" "netpbm documentation" .SH NAME pamtowinicon - convert Netpbm PAM images to a Microsoft Windows icon file .UN synopsis .SH SYNOPSIS \fBpamtowinicon\fP [\fB-pngthreshold=\fP\fIthreshold\fP] [\fB-truetransparent\fP] [\fB-verbose\fP] [\fIpam_file\fP] .PP All options can be abbreviated to their shortest unique prefix. You may use two hyphens instead of one to designate an option. You may use either white space or equals signs between an option name and its value. .UN description .SH DESCRIPTION .PP This program is part of .BR "Netpbm" (1)\c \&. .PP \fBpamtowinicon\fP reads an RGB_ALPHA Netpbm PAM file and converts it to a Microsoft Windows icon file. .PP The output goes to Standard Output. .PP The input is a multi-image PAM file; each image becomes an icon in the output file. If you have input images in multiple files, you can simply combine them with \fBcat\fP and pass the result to \fBpamtowinicon\fP. .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 \&), \fBpamtowinicon\fP recognizes the following command line options: .TP \fB-pngthreshold=\fP\fIthreshold\fP \fBpamtowinicon\fP encodes images with resolutions above or equal \fIthreshold\fP by \fIthreshold\fP as PNG by running .BR "\fBpnmtopng\fP" (1)\c \&. Other images it encodes using the more traditional BMP format. .sp When the program uses PNG encoding for a 5-channel PAM with separate AND mask (see below), it discards the AND mask. Because PNG has always had the ability to specify transparency, the Windows icon format does not provide for a separate and mask when the icon is encoded in PNG. .sp The default value for \fIthreshold\fP is 128. .TP \fB-truetransparent\fP Make all pixels outside the opaque area black, avoiding inversion and other effects on the background of the image (see .BR "Windows Icons" (1)\c \&). .TP \fB-verbose\fP Print more messages .UN images .SH IMAGES .PP \fBpamtowinicon\fP reads a (multi-image) Netpbm PAM file as input and outputs an single Windows icon file containing those images. .PP The images in the icon file are in the same order as in the PAM input. .UN paminput .SS PAM Input .PP \fBpamtowinicon\fP interprets the PAM images as follows, based on the number of channels. .TS l l. _ channels image 1 fully opaque grayscale image 2 grayscale image with transparency channel 3 fully opaque color image 4 color image with transparency channel 5 color image with transparency channel and additional AND mask .TE .PP The tuple types of the PAMs are irrelevant. .UN andmask .SS AND Mask The so-called "AND mask" is a special feature of Microsoft Windows icons. It is required for all BMP encoded images. At the first sight, the AND mask is a 1-bit transparency channel, but it is also used for e.g. shading the icon while dragging. See .BR "Windows Icons" (1)\c \& for details. .PP If there is no explicit AND mask, but transparency data in the input image, \fBpamtowinicon\fP sets the AND mask to opaque where the sample in the transparency channel is below maxval, and to transparent elsewhere. .PP If no transparency data is present in the input image, \fBpamtowinicon\fP assumes the whole image to be fully opaque. .UN bmpoutput .SS BMP Output When BMP encoding an image, \fBpamtowinicon\fP tries to use the most compact \fBBI_RGB\fP format allowed for icon images with a color depth of eight bits per channel. .PP \fBpamtowinicon\fP generates neither 16-bit \fBBI_RGB\fP nor \fBBI_BITFIELDS\fP BMP encoded images, even if the maxval of the input PAM is not 255. .UN seealso .SH SEE ALSO .IP \(bu .BR "\fBwinicontopam\fP" (1)\c \& .IP \(bu .BR "\fBppmtowinicon\fP" (1)\c \& .IP \(bu .BR "\fBpam\fP" (1)\c \& .IP \(bu .BR "\fBWindows Icons\fP" (1)\c \& .PP For information on the PNG format, see .UR http://schaik.com/png http://schaik.com/png .UE \&. .UN history .SH HISTORY .PP \fBpamtowinicon\fP was new in Netpbm 10.63 (June 2013). It obsoleted \fBppmtowinicon\fP by providing more function and conforming better to Netpbm conventions. .UN author .SH AUTHOR .PP Copyright (C) 2013 by Ludolf Holzheid. .PP Translated to Netpbm coding style by Bryan Henderson. .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/pamtowinicon.html .PP