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1995-07-25
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133 lines
ppppppppmmmmttttooooiiiiccccrrrr((((1111)))) XXXXEEEENNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV ((((33330000 JJJJuuuullllyyyy 1111999999990000)))) ppppppppmmmmttttooooiiiiccccrrrr((((1111))))
NNNNAAAAMMMMEEEE
ppmtoicr - convert a portable pixmap into NCSA ICR format
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
ppppppppmmmmttttooooiiiiccccrrrr [----wwwwiiiinnnnddddoooowwwwnnnnaaaammmmeeee _n_a_m_e] [----eeeexxxxppppaaaannnndddd _e_x_p_a_n_d] [----ddddiiiissssppppllllaaaayyyy
_d_i_s_p_l_a_y] [----rrrrlllleeee] [_p_p_m_f_i_l_e]
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
Reads a portable pixmap file as input. Produces an NCSA
Telnet Interactive Color Raster graphic file as output. If
_p_p_m_f_i_l_e is not supplied, _p_p_m_t_o_i_c_r will read from standard
input.
Interactive Color Raster (ICR) is a protocol for displaying
raster graphics on workstation screens. The protocol is
implemented in NCSA Telnet for the Macintosh version 2.3.
The ICR protocol shares characteristics of the Tektronix
graphics terminal emulation protocol. For example, escape
sequences are used to control the display.
_p_p_m_t_o_i_c_r will output the appropriate sequences to create a
window of the dimensions of the input pixmap, create a
colormap of up to 256 colors on the display, then load the
picture data into the window.
Note that there is no icrtoppm tool - this transformation is
one way.
OOOOPPPPTTTTIIIIOOOONNNNSSSS
----wwwwiiiinnnnddddoooowwwwnnnnaaaammmmeeee_n_a_m_e
Output will be displayed in _n_a_m_e (Default is
to use _p_p_m_f_i_l_e or "untitled" if standard input
is read.)
----eeeexxxxppppaaaannnndddd_e_x_p_a_n_d Output will be expanded on display by factor
_e_x_p_a_n_d (For example, a value of 2 will cause
four pixels to be displayed for every input
pixel.)
----ddddiiiissssppppllllaaaayyyy_d_i_s_p_l_a_y
Output will be displayed on screen numbered
_d_i_s_p_l_a_y
----rrrrlllleeee Use run-length encoded format for display.
(This will nearly always result in a quicker
display, but may skew the colormap.)
EEEEXXXXAAAAMMMMPPPPLLLLEEEESSSS
To display a _p_p_m file using the protocol:
ppmtoicr ppmfile
This will create a window named _p_p_m_f_i_l_e on the display with
the correct dimensions for _p_p_m_f_i_l_e, create and download a
Page 1 (printed 9/7/93)
ppppppppmmmmttttooooiiiiccccrrrr((((1111)))) XXXXEEEENNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV ((((33330000 JJJJuuuullllyyyy 1111999999990000)))) ppppppppmmmmttttooooiiiiccccrrrr((((1111))))
colormap of up to 256 colors, and download the picture into
the window. The same effect may be achieved by the following
sequence:
ppmtoicr ppmfile > filename
cat filename
To display a GIF file using the protocol in a window titled
after the input file, zoom the displayed image by a factor
of 2, and run-length encode the data:
giftoppm giffile | ppmtoicr -w giffile -r -e 2
BBBBUUUUGGGGSSSS
The protocol uses frequent _f_f_l_u_s_h calls to speed up display.
If the output is saved to a file for later display via _c_a_t,
drawing will be much slower. In either case, increasing the
Blocksize limit on the display will speed up transmission
substantially.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
ppppppppmmmm((((5555))))
_N_C_S_A _T_e_l_n_e_t _f_o_r _t_h_e _M_a_c_i_n_t_o_s_h, University of Illinois at
Urbana-Champaign (1989)
AAAAUUUUTTTTHHHHOOOORRRR
Copyright (C) 1990 by Kanthan Pillay
(svpillay@Princeton.EDU), Princeton University Computing and
Information Technology.
Page 2 (printed 9/7/93)