BITMAP_FOLD(9) Basic Kernel Library Functions BITMAP_FOLD(9)NAME
bitmap_fold - fold larger bitmap into smaller, modulo specified size
SYNOPSIS
void bitmap_fold(unsigned long * dst, const unsigned long * orig, int sz, int bits);
ARGUMENTS
dst
resulting smaller bitmap
orig
original larger bitmap
sz
specified size
bits
number of bits in each of these bitmaps
DESCRIPTION
For each bit oldbit in orig, set bit oldbit mod sz in dst. Clear all other bits in dst. See further the comment and Example [2] for
bitmap_onto for why and how to use this.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 BITMAP_FOLD(9)
Check Out this Related Man Page
pbmtoascii(1) General Commands Manual pbmtoascii(1)NAME
pbmtoascii - convert a portable bitmap into ASCII graphics
SYNOPSIS
pbmtoascii [-1x2|-2x4] [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Produces a somewhat crude ASCII graphic as output.
Note that there is no asciitopbm tool - this transformation is one-way.
OPTIONS
The -1x2 and -2x4 flags give you two alternate ways for the bits to get mapped to characters. With 1x2, the default, each character repre-
sents a group of 1 bit across by 2 bits down. With -2x4, each character represents 2 bits across by 4 bits down. With the 1x2 mode you
can see the individual bits, so it's useful for previewing small bitmaps on a non-graphics terminal. The 2x4 mode lets you display larger
bitmaps on a standard 80-column display, but it obscures bit-level details. 2x4 mode is also good for displaying graymaps - "pnmscale
-width 158 | pgmnorm | pgmtopbm -thresh" should give good results.
SEE ALSO pbm(5)AUTHOR
Copyright (C) 1988, 1992 by Jef Poskanzer.
20 March 1992 pbmtoascii(1)
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