home *** CD-ROM | disk | FTP | other *** search
-
-
-
- ppppppppmmmmttttooooaaaaccccaaaadddd((((1111)))) XXXXEEEENNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV ((((11110000 OOOOccccttttoooobbbbeeeerrrr 1111999999991111)))) ppppppppmmmmttttooooaaaaccccaaaadddd((((1111))))
-
-
-
- NNNNAAAAMMMMEEEE
- ppmtoacad - convert portable pixmap to AutoCAD database or
- slide
-
- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ppppppppmmmmttttooooaaaaccccaaaadddd [----ddddxxxxbbbb] [----ppppoooollllyyyy] [----bbbbaaaacccckkkkggggrrrroooouuuunnnndddd _c_o_l_o_u_r] [----wwwwhhhhiiiitttteeee] [----
- aaaassssppppeeeecccctttt _r_a_t_i_o] [----8888] [_p_p_m_f_i_l_e]
-
- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- Reads a portable pixmap as input. Produces an AutoCAD(Reg.)
- slide file or binary database import (.dxb) file as output.
- If no _p_p_m_f_i_l_e is specified, input is read from standard
- input.
-
- OOOOPPPPTTTTIIIIOOOONNNNSSSS
- ----ddddxxxxbbbb An AutoCAD binary database import (.dxb) file is
- written. This file is read with the DXBIN command and,
- once loaded, becomes part of the AutoCAD geometrical
- database and can be viewed and edited like any other
- object. Each sequence of identical pixels becomes a
- separate object in the database; this can result in
- very large AutoCAD drawing files. However, if you want
- to trace over a bitmap, it lets you zoom and pan around
- the bitmap as you wish.
-
- ----ppppoooollllyyyy
- If the ----ddddxxxxbbbb option is not specified, the output of
- ppppppppmmmmttttooooaaaaccccaaaadddd is an AutoCAD slide file. Normally each row
- of pixels is represented by an AutoCAD line entity. If
- ----ppppoooollllyyyy is selected, the pixels are rendered as filled
- polygons. If the slide is viewed on a display with
- higher resolution than the source pixmap, this will
- cause the pixels to expand instead of appearing as
- discrete lines against the screen background colour.
- Regrettably, this representation yields slide files
- which occupy more disc space and take longer to
- display.
-
- ----bbbbaaaacccckkkkggggrrrroooouuuunnnndddd _c_o_l_o_u_r
- Most AutoCAD display drivers can be configured to use
- any available colour as the screen background. Some
- users perfer a black screen background, others white,
- while splinter groups advocate burnt ocher, tawny puce,
- and shocking grey. Discarding pixels whose closest
- AutoCAD colour representation is equal to the
- background colour can substantially reduce the size of
- the AutoCAD database or slide file needed to represent
- a bitmap. If no ----bbbbaaaacccckkkkggggrrrroooouuuunnnndddd colour is specified, the
- screen background colour is assumed to be black. Any
- AutoCAD colour number may be specified as the screen
- background; colour numbers are assumed to specify the
- hues defined in the standard AutoCAD 256 colour
-
-
-
- Page 1 (printed 9/7/93)
-
-
-
-
-
-
- ppppppppmmmmttttooooaaaaccccaaaadddd((((1111)))) XXXXEEEENNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV ((((11110000 OOOOccccttttoooobbbbeeeerrrr 1111999999991111)))) ppppppppmmmmttttooooaaaaccccaaaadddd((((1111))))
-
-
-
- palette.
-
- ----wwwwhhhhiiiitttteeee
- Since many AutoCAD users choose a white screen
- background, this option is provided as a short-cut.
- Specifying ----wwwwhhhhiiiitttteeee is identical in effect to ----bbbbaaaacccckkkkggggrrrroooouuuunnnndddd
- 7777.
-
- ----aaaassssppppeeeecccctttt _r_a_t_i_o
- If the source pixmap had non-square pixels, the ratio
- of the pixel width to pixel height should be specified
- as _r_a_t_i_o. The resulting slide or .dxb file will be
- corrected so that pixels on the AutoCAD screen will be
- square. For example, to correct an image made for a
- 320x200 VGA/MCGA screen, specify ----aaaassssppppeeeecccctttt 0000....8888333333333333.
-
- ----8888 Restricts the colours in the output file to the 8 RGB
- shades.
-
- All flags can be abbreviated to their shortest unique
- prefix.
-
- BBBBUUUUGGGGSSSS
- AutoCAD has a fixed palette of 256 colours, distributed
- along the hue, lightness, and saturation axes. Pixmaps
- which contain many nearly-identical colours, or colours not
- closely approximated by AutoCAD's palette, may be poorly
- rendered.
-
- ppppppppmmmmttttooooaaaaccccaaaadddd works best if the system displaying its output
- supports the full 256 colour AutoCAD palette. Monochrome, 8
- colour, and 16 colour configurations will produce less than
- optimal results.
-
- When creating a .dxb file or a slide file with the ----ppppoooollllyyyy
- option, ppppppppmmmmttttooooaaaaccccaaaadddd finds both vertical and horizontal runs of
- identical pixels and consolidates them into rectangular
- regions to reduce the size of the output file. This is
- effective for images with large areas of constant colour but
- it's no substitute for true raster to vector conversion. In
- particular, thin diagonal lines are not optimised at all by
- this process.
-
- Output files can be huge.
-
- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- AutoCAD Reference Manual: _S_l_i_d_e _F_i_l_e _F_o_r_m_a_t and _B_i_n_a_r_y
- _D_r_a_w_i_n_g _I_n_t_e_r_c_h_a_n_g_e (_D_X_B) _F_i_l_e_s, ppppppppmmmm(5)
-
- AAAAUUUUTTTTHHHHOOOORRRR
- John Walker
- Autodesk SA
-
-
-
- Page 2 (printed 9/7/93)
-
-
-
-
-
-
- ppppppppmmmmttttooooaaaaccccaaaadddd((((1111)))) XXXXEEEENNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV ((((11110000 OOOOccccttttoooobbbbeeeerrrr 1111999999991111)))) ppppppppmmmmttttooooaaaaccccaaaadddd((((1111))))
-
-
-
- Avenue des Champs-Montants 14b
- CH-2074 MARIN
- Suisse/Schweiz/Svizzera/Svizra/Switzerland
- Usenet: kelvin@Autodesk.com
- Fax: 038/33 88 15
- Voice: 038/33 76 33
-
- Permission to use, copy, modify, and distribute this
- software and its documentation for any purpose and without
- fee is hereby granted, without any conditions or
- restrictions. This software is provided ``as is'' without
- express or implied warranty.
-
- AutoCAD and Autodesk are registered trademarks of Autodesk,
- Inc.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Page 3 (printed 9/7/93)
-
-
-
-