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OptIcon OptIcon
NAME
OptIcon -- Optimize icon images for size and speed (V36)
SYNOPSIS
OptIcon NAME/A/M,DEPTH=PLANES/N,NOEXPAND/S,CRITICAL/S,VERBOSE/S
FUNCTION
OptIcon reads in given ".info" files and scans the icon image
in order to optimize the PlanePick and PlaneOnOff fields in the
icon Image structure. This is a space-saving mechanism for image
data.
Rather than defining the image data for every plane of the RastPort,
you need define data only for the planes that are not entirely zero
or one. As you define your Imagery, you will often find that most
of the planes ARE just as color selectors. For instance, if you're
designing a two-color icon to use colors one and three, and the icon
will reside in a five-plane display, bit plane zero of your
imagery would be all ones, bit plane one would have data that
describes the imagery, and bit planes two through four would be
all zeroes. Using these flags avoids wasting all that memory in
this way: first, you specify which planes you want your data to
appear in using the PlanePick variable. For each bit set in the
variable, the next "plane" of your image data is blitted to the
display. For each bit clear in this variable, the corresponding bit
in PlaneOnOff is examined. If that bit is clear, a "plane" of zeroes
will be used. If the bit is set, ones will go out instead.
Note that if you want an Image that is only a filled rectangle, you
can get this by setting PlanePick to zero (pick no planes of data)
and set PlaneOnOff to describe the pen color of the rectangle.
INPUTS
NAME - name of the icon image file. A trailing ".info"
is optional but not required.
DEPTH - maximum number of bitplanes to be saved.
VERBOSE - display input and output information for each icon.
EXAMPLE
;Remove all but the first 3 planes of the icon image for the
;disk in drive DF0: but don't add any planes
opticon df0:disk planes=3 noexpand
NOTES
Since the IconEdit from Commodore will always save 8 bitplane icons
the above example might be of great use to you. (Note that 3 plane
images are not only smaller but also faster!)
Coming with OptIcon is the script PatchIcons which will recursively
descend all subdirectories of a given path deleting all but the first
3 planes of all icon images in that path.
OptIcon now also allows you to expand your 8 or more color icons
for the use on a 16 or more color Workbench. This is important due
to the new color system under OS3.x which always shifts the second
four colors to the end of the system palette. Therefore you might
want to adapt an icon's color depth to the actual screenmode it is
used on.
EXAMPLE
;Remap the last 4 of at least 8 colors of the RAM DISK icon
;to the last 4 colors in a 16 or more colors Workbench palette
opticon ram:disk planes=4
BUGS
Commodore's PutDiskObject() currently [icon.library 40.1 (15.2.93)]
re-expands icon images using the PlanePick/PlaneOnOff mechanism and
in fact PutDiskObject() has quite a lot of problems doing so!
For this reason OptIcon will perform the PlanePick/PlaneOnOff
optimization only if the keyword CRITICAL is given in the command
line.
DISCLAIMER
This file is part of the Icon2C and OptIcon distribution.
Icon2C and OptIcon are free software; you can redistribute them
and/or modify them under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 1 of
the License, or (at your option) any later version.
Icon2C and Opticon are distributed in the hope that they will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with these programs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
COPYRIGHT
Icon2C and OptIcon are Copyright (C)1994 by Tobias Ferber.
You can reach me via E-mail: ukjg@rz.uni-karlsruhe.de
SEE ALSO
PatchIcons, Icon2C