.\" Copyright (c) 1990, 1995, Oracle and/or its affiliates. All rights reserved.

.\"

.\" Permission is hereby granted, free of charge, to any person obtaining a

.\" copy of this software and associated documentation files (the "Software"),

.\" to deal in the Software without restriction, including without limitation

.\" the rights to use, copy, modify, merge, publish, distribute, sublicense,

.\" and/or sell copies of the Software, and to permit persons to whom the

.\" Software is furnished to do so, subject to the following conditions:

.\"

.\" The above copyright notice and this permission notice (including the next

.\" paragraph) shall be included in all copies or substantial portions of the

.\" Software.

.\"

.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

.\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

.\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

.\" THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

.\" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

.\" FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

.\" DEALINGS IN THE SOFTWARE.

.TH cmap_compact 1 "15 October 2010"

.IX "cmap_comapct" "" "\f3cmap_compact\f1(1) \(em utility to reduce colormap flashing" ""

.IX "color" "prev" "color" "preventing flashing \(em \f3cmap_compact\f1(1)" ""

.SH NAME

cmap_compact \- colormap configuration utility to reduce colormap flashing.

.SH SYNOPSIS

.B cmap_compact

[

.B \\fIop\f1 

] [

.B \-display

.I dpyname

]

.SH DESCRIPTION

.LP

.B cmap_compact

is a utility which allows certain colors to be designated as special

and to be promoted to the high end of the default colormap (toward pixel 255).

This reduces colormap flashing in many situations.

.PP

This technique has no effect for monochrome or full color screens; it 

applies only to PseudoColor screens.

.SH OPTIONS

.TP

\f3-display\f1 \fIdpyname\f1

Indicates the X11 display to use.  ':0' is the default.

.LP

\fIop\f1 can be one of the following operations:

.TP

.B save

Records the RGB color values of all shareable (read-only) colors in the

default colormap for each active screen and saves these values on

the file \f3~/.owcolors\f1.

.PP

The black and white pixels (typically at pixels 254 and 255) are ignored

during the save.  

.PP

Note that all colors are ignored for screens with a StaticColor default colormap.

Note also that the server is grabbed during the save.

.TP

.B init

Reads the colors which have been saved in \f3~/.owcolors\f1 and allocates

them as read-only colors at the high-end of the default colormap.

The color allocations for those applications which use these colors 

will be derived from these high colors.

If there is no \f3~/.owcolors\f1 file, nothing happens and no message

is printed out.

.PP

The colors are allocated in reverse order of the order in which they

were saved.  Thus, the lowest pixel in the colormap at save time

becomes the highest pixel at initialization time.  

.PP

This operation is typically invoked from \f3~/.xinitrc\f1 prior to

starting the color applications.

.PP

This operation creates on the root window of each screen a property named 

\fIXA_COMPACTED_COLORS_COUNT\f1 of type XA_INTEGER.

The value of this property specifies the number of initialized colors for that screen.

Note: this value also includes the black and white pixels.

.PP

An X11 \fIclose down mode\f1 of \f3RetainPermanent\f1 is set so that

the colors this program allocates will stay around after \f3cmap_compact\f1

exits.  These colors may be freed by calling \f3cmap_compact\ dealloc\f1 .

Before this program allocates its colors, it frees any colors left

over from a previous invocation.

.PP

If there are more saved colors than can fit in the default colormap,

as many colors as will fit are allocated and a warning message

is printed out.   This situation, for example, might occur if the

the default visual were switched from an 8-bit to a 4-bit visual 

without discarding saved colors.

.PP

Note: no allocations occur for screens with a StaticColor default colormap.

.br

Note: The server is grabbed during the initialization.

.TP

.B discard

This operation removes the file \f3~/.owcolors\f1.

.TP

.B dealloc

This operation frees colors allocated by a previous invocation of 

.BR cmap_compact\ init .

.TP

.B show

This operation prints out the RGB values of the saved colors for each screen.

.SH FILES

.TP

\f3~/.owcolors\f1

The file which is generated by

.BR cmap_compact\ save .

Contains a list of saved, read-only workspace colors for all screens.  

.SH SEE ALSO

.BR xstdcmap (1),

.BR cmap_alloc (1).

.br

.SH BUGS

Currently does not support using the same \f3~/.owcolors\f1 file

for different machine architectures.