NetNews Usenet Archive 1992 #30/NN_1992_30.iso/spool/comp/sources/misc/4192

Text File | 1992-12-14 | 57.5 KB | 1,477 lines

Newsgroups: comp.sources.misc
Path: sparky!kent
From: [e-mail] (John Cristy)
Subject:  v34i052:  imagemagick - X11 image processing and display v2.2, Part24/26
Message-ID: <[e-mail]>
Followup-To: comp.sources.d
X-Md4-Signature: ddc213416383218cd7dc1a0c01672bc8
Sender: [e-mail] (Kent Landfield)
Organization: Sterling Software
References: <csm-v34i028=[e-mail]>
Date: Tue, 15 Dec 1992 03:59:13 GMT
Approved: [e-mail]
Lines: 1462

Submitted-by: [e-mail] (John Cristy)
Posting-number: Volume 34, Issue 52
Archive-name: imagemagick/part24
Environment: UNIX, VMS, X11, SGI, DEC, Cray, Sun, Vax

#!/bin/sh
# this is Part.24 (part 24 of a multipart archive)
# do not concatenate these parts, unpack them in order with /bin/sh
# file ImageMagick/montage.man continued
#
if test ! -r _shar_seq_.tmp; then
    echo 'Please unpack part 1 first!'
    exit 1
fi
(read Scheck
 if test "$Scheck" != 24; then
    echo Please unpack part "$Scheck" next!
    exit 1
 else
    exit 0
 fi
) < _shar_seq_.tmp || exit 1
if test ! -f _shar_wnt_.tmp; then
    echo 'x - still skipping ImageMagick/montage.man'
else
echo 'x - continuing file ImageMagick/montage.man'
sed 's/^X//' << 'SHAR_EOF' >> 'ImageMagick/montage.man' &&
\fP-background\fP command line argument or X resource.  The width and
height of the composite image is determined by the title specified,
the maximum tile size, the number of tiles per row, the tile border
width and height, the image border width, and the label height.  The
number of tiles per row specifies how many images are to appear in each
row of the composite image.  The default is to have an equal number of
images in each row and column of the composite.  A specific value is
specified with \fB-tiles_per_row\fP.  The tile border width and height,
and the image border width defaults to the value of the X resource
\fB-borderwidth\fP.  It can be changed with the \fB-borderwidth\fP or
\fB-geometry\fP command line argument or X resource.  The label height
is determined by the font you specify with the \fB-font\fP command line
argument or X resource.  If you do not specify a font, a font is
choosen that allows the name of the image to fit the maximum width of a
tiled area.  The label colors is determined by the \fB-background\fP
and \fB-foreground\fP command line argument or X resource.  Note, that
if the background and foreground colors are the same, labels will not
appear.
X
Initially, the composite image title is placed at the top if one is
specified (refer to \fB-foreground\fP X resource).  Next, each image is
set onto the composite image, surrounded by its border color, with its
name centered just below it.  The individual images are left-justified
within the width of the tiled area.  The order of the images is the
same as they appear on the command line unless the images have a scene
keyword.  If a scene number is specified in each image, then the images
are tiled onto the composite in the order of their scene number.  Finally,
the last argument on the command line is the name assigned to the
composite image.  By default, the image is written in the \fIMIFF\fP format
and can be viewed or printed with \fBdisplay(1)\fP.
X
You can specify a particular image format by prefixing \fIfile\fP with
the image type and a colon (i.e. mtv:image) or specify the image type
as the filename suffix (i.e. image.mtv).  See \fBconvert(1)\fP for a
list of valid image formats.  If \fIfile\fP has the extension \fB.Z\fP,
the file size is reduced using Lempel-Ziv coding with \fBcompress\fP.
If \fIfile\fP already exists, you will be prompted as to whether it
should be overwritten.
.SH EXAMPLES
To create a montage of a cockatoo, a parrot, and a hummingbird and write
it to a file called birds, use:
.PP
X     montage cockatoo.miff parrot.miff hummingbird.miff birds.miff
.PP
To tile several bird images so that they are at most 256 pixels in width and
192 pixels in height, surrounded by a red border, and separated by
10 pixels of background color, use:
.PP
X     montage -geometry 256x192+10+10 -bordercolor red birds.* montage.miff
X
To create an unlabeled parrot image, 640 by 480 pixels, and surrounded
by a border of black, use:
.PP
X     montage +display -geometry 640x480 -bordercolor black parrot.miff bird.miff
.SH OPTIONS
.TP 5
.B "-aspect_ratio
The original aspect ratio of each image is adhered to unless
\fB\+aspect_ratio\fP is specfified.
X
That is, as each image is tiled onto the composite image it is scaled
to fit the maximum width and height of the tiled area while respecting
the aspect ratio of the original image. \fB\+aspect_ratio\fP means the
image is scaled to exactly the dimensions of the tiled image as
specified by \fB\-geometry\fP.
.TP 5
.B "-clip \fI<width>x<height>+<x offset>+<y offset>\fP"
preferred size and location of the clipped image.  See \fBX(1)\fP for details
about the geometry specification.
X
Use clipping to tile only a particular area of an image.
X
The equivalent X resource for this option is \fBclipGeometry\fP
(class \fBClipGeometry\fP).  See \fBX RESOURCES\fP for details.
.TP 5
.B "-colors \fIvalue\fP"
preferred number of colors in the image.
X
The actual number of colors in the image may be less than your request,
but never more.  Note, this is a color reduction option.  Images with
less unique colors than specified with this option will remain unchanged.
Refer to \fBQuantize(9)\fP for more details.
X
Note, options \fB-dither\fP, \fB-colorspace\fP, and \fB-treedepth\fP affect
the color reduction algorithm.
.TP 5
.B "-colorspace \fIvalue\fP"
the type of colorspace: \fIGRAY\fP, \fIRGB\fP, \fIXYZ\fP, \fIYIQ\fP, or
\fIYUV\fP.
X
Color reduction, by default, takes place in the RGB color space.
Empirical evidence suggests that distances in color spaces such as YUV
or YIQ correspond to perceptual color differences more closely
than do distances in RGB space.  These color spaces may give better
results when color reducing an image.  Refer to \fBQuantize(9)\fP for
more details.
X
The \fB-colors\fP or \fB-monochrome\fP option is required for this option
to take effect.
.TP 5
.B "-compose \fIoperator\fP"
the type of image composition.
X
By default, each of the composite image pixels are replaced by the
cooresponding image tile pixel. You can choose an alternate composite
operation:
X
X    over
X    in
X    out
X    atop
X    xor
X    plus
X    minus
X    add
X    subtract
X    difference
X    replace
.PP
The operations behaves as follows:
.TP 9
.B over
The result will be the union of the two image shapes, with \fIimage\fP
obscuring \fIcomposite image\fP in the region of overlap.
.TP 9
.B in
The result is simply \fIimage\fP cut by the shape of \fIimage
window\fP.  None of the image data of \fIcomposite image\fP will be in the
result.
.TP 9
.B out
The resulting image is \fIimage\fP with the shape of \fIcomposite image\fP
cut out.
.TP 9
.B atop
The result is the same shape as image \fIcomposite image\fP, with
\fIimage\fP obscuring \fIcomposite image\fP where the image shapes
overlap.  Note this differs from \fBover\fP because the portion of
\fIimage\fP outside \fIcomposite image\fP's shape does not appear in the
result.
.TP 9
.B xor
The result is the image data from both \fIimage\fP and \fIcomposite image\fP
that is outside the overlap region.  The overlap region will be blank.
.TP 9
.B plus
The result is just the sum of the image data.  Output values are
clipped to 255 (no overflow).  This operation is independent
of the alpha channels.
.TP 9
.B minus
The result of \fIimage\fP \- \fIcomposite image\fP, with underflow clipped
to zero.  The alpha channel is ignored (set to 255, full coverage).
.TP 9
.B add
The result of \fIimage\fP + \fIcomposite image\fP, with overflow wrapping
around (\fImod\fP 256).
.TP 9
.B subtract
The result of \fIimage\fP - \fIcomposite image\fP, with underflow wrapping
around (\fImod\fP 256).  The \fBadd\fP and \fBsubtract\fP operators can
be used to perform reversible transformations.
.TP 9
.B difference
The result of abs(\fIimage\fP \- \fIcomposite image\fP).  This is useful
for comparing two very similar images.
.TP 9
.B replace
The resulting image is \fIcomposite image\fP replaced with \fIimage\fP.
Here the alpha information is ignored.
.PP
The image compositor requires an alpha, or matte channel in the image
for some operations.  This extra channel usually defines a mask which
represents a sort of a cookie-cutter for the image.  This is the case
when alpha is 255 (full coverage) for pixels inside the shape, zero
outside, and between zero and 255 on the boundary.  If \fIimage\fP does
not have an alpha channel, it is initialized with 0 for any pixel
matching in color to pixel location (0,0), otherwise 255 (to work
properly \fBborderwidth\fP must be 0).
.TP 5
.B "-compress \fItype\fP"
the type of image compression: \fIQEncoded\fP or \fIRunlengthEncoded\fP.
X
This option specifies the type of image compression for the composite
image.  See \fBMIFF(5)\fP for details.
X
Specify \fB\+compress\fP to store the binary image in an uncompressed format.
The default is the compression type of the specified image file.
.TP 5
.B "-density \fI<width>x<height>
vertical and horizonal density of the image.
X
This option specifies an image density whose interpretation changes
with the type of image.  The default is 72 dots per inch in the
horizonal and vertical direction for Postscript.  Text files default to
80 characters in width and 60 lines in height.  Use this option to
alter the default density.
.TP 5
.B "-display \fIhost:display[.screen]\fP"
specifies the X server to contact; see \fBX(1)\fP.
X
Specify \fB+display\fP if an X server is not available.  The label font
is obtained from the X server.  If none is available, the composite image
will not have labels.
.TP 5
.B "-dither"
apply Floyd/Steinberg error diffusion to the image.
X
The basic strategy of dithering is to trade intensity resolution for
spatial resolution by averaging the intensities of several neighboring
pixels.  Images which suffer from severe contouring when reducing colors
can be improved with this option.
X
The \fB-colors\fP or \fB-monochrome\fP option is required
for this option to take effect.
.TP 5
.B "-gamma \fIvalue\fP"
level of gamma correction.
X
The same color image displayed on two different workstations may look
different due to differences in the display monitor.  Use gamma
correction to adjust for this color difference.  Reasonable values
extend from 0.8 to 2.3.
.TP 5
.B "-geometry \fI<width>x<height>+<border width>+<border height>\fP"
preferred tile and border size of each tile of the composite image.
See \fBX(1)\fP for details about the geometry specification.  By default,
the tile size is 256x256 and there is no border.
X
The tile size you specify is a maximum size.  Each image is scaled to
fit the maximum size while still retaining its original aspect ratio.
Each image is surrounded by a border whose size in pixels is specified
as \fI<border width>\fP and \fI<border height>\fP and whose color is
the background color.
X
The equivalent X resource for this option is \fBimageGeometry\fP
(class \fBImageGeometry\fP).  See \fBX RESOURCES\fP for details.
.TP 5
.B "-gravity \fIdirection\fP"
direction image gravitates to within a tile.  See \fBX(1)\fP for details
about the gravity specification.
X
A tile of the composite image is a fixed width and height.  However,
the image within the tile may not fill it completely (see
\fB-aspect_ratio\fP).  The direction you specify indicates where to
position the image within the tile.  For example \fICenter\fP gravity
forces the image to be centered within the tile.  By default, the image
gravity is \fICenter\fP.
.TP 5
.B "-monochrome"
transform the image to black and white.
X
Monochrome images can benefit from error diffusion.  Use \fB-dither\fP with
this option to diffuse the error.
.TP 5
.B "-rotate \fIdegrees\fP"
apply Paeth image rotation to the image.
.TP 5
.B "-tiles_per_row \fIvalue\fP"
specifies how many images are to appear in each row of the composite image.
The default is to have an equal number of images in each row and column of
the composite.
.TP 5
.B "-treedepth \fIvalue\fP"
Normally, this integer value is zero or one.  A zero or one tells
\fIMontage\fP to choose a optimal tree depth for the color reduction
algorithm.
X
An optimal depth generally allows the best representation of the source
image with the fastest computational speed and the least amount of
memory.  However, the default depth is inappropriate for some images.
To assure the best representation, try values between 2 and 8 for this
parameter.  Refer to \fBQuantize(9)\fP for more details.
X
The \fB-colors\fP or \fB-monochrome\fP option is required for this option
to take effect.
.TP 5
.B -verbose
print detailed information about the image.
X
This information is printed: image scene number;  image name;  image size;
the image class (\fIDirectClass\fP or \fIPseudoClass\fP);  the total
number of unique colors;  and the number of seconds to read and write the
image.
.PP
In addition to those listed above, you can specify these standard X
resources as command line options:  -background, -bordercolor, -borderwidth,
-font, -foreground, -title.
See \fBX RESOURCES\fP for details.
.PP
Any option you specify on the command line remains in effect until it is
explicitly changed by specifying the option again with a different effect.
For example, to montage two images, the first with 32 colors and the
second with only 16 colors, use:
.PP
X     montage -colors 32 cockatoo.1 -colors 16 cockatoo.2 cockatoo.miff
.PP
Change \fI-\fP to \fI\+\fP in any option above to reverse its effect.
For example, specify \fB\+dither\fP to not apply error diffusion to an
image.
.PP
\fIfile\fP specifies the image filename.  By default, the image format
is determined by its magic number. To specify a particular image
format, precede the filename with an image format name and a colon
(i.e.  mtv:image) or as the filename suffix (i.e. image.mtv).  See
\fBconvert(1)\fP for a list of valid image formats.  Specify \fIfile\fP
as \fI-\fP for standard input or output.  If \fIfile\fP has the
extension \fB.Z\fP, the file is decoded with \fIuncompress\fP.
X
Note, a composite MIFF image displayed to an X server with
\fIdisplay\fB behaves differently than other images.  You can think of
the composite as a visual image directory.  Choose a particular tile of
the composite and press a button to display it.  See \fBdisplay(1)\fP
and \fBMIFF(5)\fP for details.
X
.SH "X RESOURCES"
\fIMontage\fP options can appear on the command line or in your X
resource file.  Options on the command line supersede values specified
in your X resource file.  See \fBX(1)\fP for more information on X
resources.
X
All \fImontage\fP options have a corresponding X resource.  In addition,
\fImontage\fP uses the following X resources:
.TP 5
.B background (\fPclass\fB Background)
Specifies the preferred color to use for the composite image background.  The
default is black.
.TP 5
.B borderColor (\fPclass\fB BorderColor)
Specifies the preferred color to use for the composite image border.  The
default is white.
.TP 5
.B borderWidth (\fPclass\fB BorderWidth)
Specifies the width in pixels of the composite image border.  The default is 2.
.TP 5
.B font (\fPclass\fB Font)
Specifies the name of the preferred font to use when displaying text
within the composite image.  The default is 9x15, fixed, or 5x8 determined by
the composite image size.
.TP 5
.B foreground (\fPclass\fB Foreground)
Specifies the preferred color to use for text within the composite image.  The
default is white.
.TP 5
.B title (\fPclass\fB Title)
This resource specifies the title to be placed at the top of the composite
image.  The default is not to place a title at the top of the composite image.
.SH ENVIRONMENT
.TP 5
.B DISPLAY
To get the default host, display number, and screen.
.SH SEE ALSO
display(1), mogrify(1), convert(1), X(1), Quantize(9), MIFF(5), compress(1)
.SH COPYRIGHT
Copyright 1992 E. I. du Pont de Nemours & Company
.PP
Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of E. I. du Pont de Nemours
& Company not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.  E. I. du Pont de Nemours & Company makes no representations
about the suitability of this software for any purpose.  It is provided
"as is" without express or implied warranty.
.PP
E. I. du Pont de Nemours & Company disclaims all warranties with regard
to this software, including all implied warranties of merchantability
and fitness, in no event shall E. I. du Pont de Nemours & Company be
liable for any special, indirect or consequential damages or any
damages whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action, arising
out of or in connection with the use or performance of this software.
.SH ACKNOWLEDGEMENTS
The MIT X Consortium for making network transparent graphics a reality.
.PP
Michael Halle, Spatial Imaging Group at MIT, for the initial
implementation of Alan Paeth's image rotation algorithm.
.PP
David Pensak, E. I. du Pont de Nemours & Company, for providing a
computing environment that made this program possible.
.PP
Paul Raveling, USC Information Sciences Institute, for the original
idea of using space subdivision for the color reduction algorithm.
.SH AUTHORS
John Cristy, E.I. du Pont de Nemours & Company Incorporated
SHAR_EOF
echo 'File ImageMagick/montage.man is complete' &&
chmod 0644 ImageMagick/montage.man ||
echo 'restore of ImageMagick/montage.man failed'
Wc_c="`wc -c < 'ImageMagick/montage.man'`"
test 17572 -eq "$Wc_c" ||
    echo 'ImageMagick/montage.man: original size 17572, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/PreRvIcccm.h ==============
if test -f 'ImageMagick/PreRvIcccm.h' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/PreRvIcccm.h (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/PreRvIcccm.h (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/PreRvIcccm.h' &&
#ifdef PRE_R5_ICCCM
/*
X  Compatability defines for pre X11R5 ICCCM.
*/
extern XrmDatabase
X  XrmGetDatabase();
#endif
X
#ifdef PRE_R4_ICCCM
/*
X  Compatability defines for pre X11R4 ICCCM.
*/
#ifdef vms
#define XMaxRequestSize(display)  16384
#endif
X
#define XInductColormap(display,colormap)  XInstallColormap(display,colormap)
#define XUninductColormap(display,colormap)  XUninstallColormap(display,colormap)
X
typedef struct _XTextProperty
{
X  unsigned char
X    *value;
X
X  Atom
X    encoding;
X
X  int
X    format;
X
X  unsigned long
X    nitems;
} XTextProperty;
X
/*
X  Pre R4 ICCCM compatibility routines.
*/
char
X  *XResourceManagerString();
X
extern int
X  XWMGeometry();
X
extern Status
X  XGetRGBColormaps(),
X  XGetWMName(),
X  XReconfigureWMWindow(),
X  XSetWMProtocols(),
X  XWithdrawWindow();
X
extern XClassHint
X  *XAllocClassHint();
X
extern XIconSize
X  *XAllocIconSize();
X
extern XSizeHints
X  *XAllocSizeHints();
X
extern XStandardColormap
X  *XAllocStandardColormap();
X
extern XWMHints
X  *XAllocWMHints();
X
extern VisualID
X  XVisualIDFromVisual();
X
extern void
X  XrmDestroyDatabase(),
X  XSetWMProperties();
#else
#define XInductColormap(display,colormap)
#define XUninductColormap(display,colormap)
#endif
SHAR_EOF
chmod 0644 ImageMagick/PreRvIcccm.h ||
echo 'restore of ImageMagick/PreRvIcccm.h failed'
Wc_c="`wc -c < 'ImageMagick/PreRvIcccm.h'`"
test 1201 -eq "$Wc_c" ||
    echo 'ImageMagick/PreRvIcccm.h: original size 1201, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/quantize.man ==============
if test -f 'ImageMagick/quantize.man' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/quantize.man (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/quantize.man (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/quantize.man' &&
.ad l
.nh
.TH QUANTIZE 9 "10 October 1992" "ImageMagick"
.SH NAME
Quantize - ImageMagick's color reduction algorithm.
.SH SYNOPSIS
.B #include <image.h>
.SH DESCRIPTION
This document describes how \fIImageMagick\fP performs color reduction on an
image.  To fully understand this document, you should have a knowledge
of basic imaging techniques and the tree data structure and terminology.
.PP
For purposes of color allocation, an image is a set of \fIn\fP pixels,
where each pixel is a point in RGB space.  RGB space is a 3-dimensional
vector space, and each pixel, \fIp\d\s-3i\s0\u\fP,  is defined by an
ordered triple of red, green, and blue coordinates, (\fIr\d\s-3i\s0\u,
g\d\s-3i\s0\u, b\d\s-3i\s0\u\fP).
.PP
Each primary color component (red, green, or blue) represents an
intensity which varies linearly from 0 to a maximum value,
\fIc\d\s-3max\s0\u\fP, which corresponds to full saturation of that
color.  Color allocation is defined over a domain consisting of the
cube in RGB space with opposite vertices at (0,0,0) and
(\fIc\d\s-3max\s0\u,c\d\s-3max\s0\u,c\d\s-3max\s0\u\fP).  \fIImageMagick\fP
requires \fIc\d\s-3max\s0\u = 255\fP.
.PP
The algorithm maps this domain onto a tree in which each node
represents a cube within that domain.  In the following discussion,
these cubes are defined by the coordinate of two opposite vertices: The
vertex nearest the origin in RGB space and the vertex farthest from the
origin.
.PP
The tree's root node represents the the entire domain, (0,0,0) through
(\fIc\d\s-3max\s0\u,c\d\s-3max\s0\u,c\d\s-3max\s0\u\fP).  Each lower level in
the tree is generated by subdividing one node's cube into eight smaller
cubes of equal size.  This corresponds to bisecting the parent cube
with planes passing through the midpoints of each edge.
.PP
The basic algorithm operates in three phases:  \fBClassification,
Reduction\fP, and \fBAssignment\fP.  \fBClassification\fP builds a
color description tree for the image.  \fBReduction\fP collapses the
tree until the number it represents, at most, is the number of colors
desired in the output image.  \fBAssignment\fP defines the output
image's color map and sets each pixel's color by reclassification in
the reduced tree.
.PP
\fBClassification\fP begins by initializing a color description tree of
sufficient depth to represent each possible input color in a leaf.
However, it is impractical to generate a fully-formed color description
tree in the classification phase for realistic values of
\fIc\d\s-3max\s0\u\fP.  If color components in the input image are
quantized to \fIk\fP-bit precision, so that \fIc\d\s-3max\s0\u =
2\u\s-3k\s0\d-1\fP, the tree would need \fIk\fP levels below the root
node to allow representing each possible input color in a leaf.  This
becomes prohibitive because the tree's total number of nodes is
.PP
X        \fI\s+6\(*S\u\s-9 k\d\di=1\s0 8k\fP\s0\u
.PP
A complete tree would require 19,173,961 nodes for \fIk = 8,
c\d\s-3max\s0\u = 255\fP.  Therefore, to avoid building a fully
populated tree, \fIImageMagick\fP: (1) Initializes data structures for
nodes only as they are needed; (2) Chooses a maximum depth for the tree
as a function of the desired number of colors in the output image
(currently \fIlog\d\s-34\s0\u(colormap size)\+2\fP).  A tree of this
depth generally allows the best representation of the source image with
the fastest computational speed and the least amount of memory.
However, the default depth is inappropriate for some images.
Therefore, the caller can request a specific tree depth.
.PP
For each pixel in the input image, classification scans downward from
the root of the color description tree.  At each level of the tree, it
identifies the single node which represents a cube in RGB space
containing the pixel's color.  It updates the following data for each
such node:
.TP 5
.B n\d\s-31\s0\u:
Number of pixels whose color is contained in the RGB cube which this
node represents;
.TP 5
.B n\d\s-32\s0\u:
Number of pixels whose color is not represented in a node at lower
depth in the tree;  initially,  \fIn\d\s-32\s0\u = 0\fP for all nodes
except leaves of the tree.
.TP 5
.B S\d\s-3r\s0\u, S\d\s-3g\s0\u, S\d\s-3b\s0\u:
Sums of the red, green, and blue component values for all pixels not
classified at a lower depth.  The combination of these sums and
\fIn\d\s-32\s0\u\fP will ultimately characterize the mean color of a
set of pixels represented by this node.
.PP
\fBReduction\fP repeatedly prunes the tree until the number of nodes with
\fIn\d\s-32\s0\u  > 0\fP is less than or equal to the maximum number of colors
allowed in the output image.  On any given iteration over the tree, it
selects those nodes whose \fIn\d\s-31\s0\u\fP count is minimal for pruning and
merges their color statistics upward.  It uses a pruning threshold,
\fIn\d\s-3p\s0\u\fP, to govern node selection as follows:
.PP
X  n\d\s-3p\s0\u = 0
X  while number of nodes with (n\d\s-32\s0\u > 0) > required maximum number of colors
X      prune all nodes such that n\d\s-31\s0\u <= n\d\s-3p\s0\u
X      Set n\d\s-3p\s0\u  to minimum n\d\s-31\s0\u  in remaining nodes
.PP
When a node to be pruned has offspring, the pruning procedure invokes
itself recursively in order to prune the tree from the leaves upward.
The values of \fIn\d\s-32\s0\u  S\d\s-3r\s0\u, S\d\s-3g\s0\u,\fP  and
\fIS\d\s-3b\s0\u\fP in a node being pruned are always added to the
corresponding data in that node's parent.  This retains the pruned
node's color characteristics for later averaging.
.PP
For each node,  \fIn\d\s-32\s0\u\fP pixels exist for which that node
represents the smallest volume in RGB space containing those pixel's
colors.  When \fIn\d\s-32\s0\u  > 0\fP the node will uniquely define a
color in the output image.  At the beginning of reduction,
\fIn\d\s-32\s0\u = 0\fP  for all nodes except the leaves of the tree
which represent colors present in the input image.
.PP
The other pixel count, \fIn\d\s-31\s0\u\fP,  indicates the total
number of colors within the cubic volume which the node represents.
This includes \fIn\d\s-31\s0\u - n\d\s-32\s0\u\fP pixels whose colors
should be defined by nodes at a lower level in the tree.
.PP
\fBAssignment\fP generates the output image from the pruned tree.  The
output image consists of two parts:  (1)  A color map, which is an
array of color descriptions (RGB triples) for each color present in the
output image; (2)  A pixel array, which represents each pixel as an
index into the color map array.
.PP
First, the assignment phase makes one pass over the pruned color
description tree to establish the image's color map.  For each node
with \fIn\d\s-32\s0\u > 0\fP, it divides \fIS\d\s-3r\s0\u,
S\d\s-3g\s0\u\fP, and \fPS\d\s-3b\s0\u\fP by \fIn\d\s-32\s0\u\fP.  This
produces the mean color of all pixels that classify no lower than this
node.  Each of these colors becomes an entry in the color map.
.PP
Finally, the assignment phase reclassifies each pixel in the pruned
tree to identify the deepest node containing the pixel's color.  The
pixel's value in the pixel array becomes the index of this node's mean
color in the color map.
.PP
Empirical evidence suggests that distances in color spaces such as
YUV, or YIQ correspond to perceptual color differences more closely
than do distances in RGB space.  These color spaces may give better
results when color reducing an image.  Here the algorithm is as described
except each pixel is a point in the alternate color space.  For convenience,
the color components are normalized to the range 0 to a maximum value,
\fIc\d\s-3max\s0\u\fP.  The color reduction can then proceed as described.
.SH "MEASURING COLOR REDUCTION ERROR"
.PP
Depending on the image, the color reduction error may be obvious or
invisible.  Images with high spatial frequencies (such as hair or
grass) will show error much less than pictures with large smoothly
shaded areas (such as faces).  This is because the high-frequency
contour edges introduced by the color reduction process are masked by
the high frequencies in the image.
.PP
To measure the difference between the original and color reduced images
(the total color reduction error), \fIImageMagick\fP sums over all pixels
in an image the distance squared in RGB space between each original
pixel value and its color reduced value. \fIImageMagick\fP prints several error
measurements including the mean error per pixel, the normalized mean error,
and the normalized maximum error.
.PP
The normalized error measurement can be used to compare images.  In
general, the closer the mean error is to zero the more the quantized
image resembles the source image.  Ideally, the error should be
perceptually-based, since the human eye is the final judge of
quantization quality.
.PP
These errors are measured and printed when \fB-verbose\fP and \fB-colors\fI
are specified on the command line:
.TP 5
.B mean error per pixel:
is the mean error for any single pixel in the image.
.TP 5
.B normalized mean square error:
is the normalized mean square quantization error for any single pixel in the
image.
X
This distance measure is normalized to a range between 0 and 1.  It is
independent of the range of red, green, and blue values in the image.
.TP 5
.B normalized maximum square error:
is the largest normalized square quantization error for any single
pixel in the image.
X
This distance measure is normalized to a range between 0 and 1.  It is
independent of the range of red, green, and blue values in the image.
.SH SEE ALSO
display(1), animate(1), mogrify(1), import(1), MIFF(5)
.SH COPYRIGHT
Copyright 1992 E. I. du Pont de Nemours & Company
.PP
Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of E. I. du Pont de Nemours
& Company not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.  E. I. du Pont de Nemours & Company makes no representations
about the suitability of this software for any purpose.  It is provided
"as is" without express or implied warranty.
.PP
E. I. du Pont de Nemours & Company disclaims all warranties with regard
to this software, including all implied warranties of merchantability
and fitness, in no event shall E. I. du Pont de Nemours & Company be
liable for any special, indirect or consequential damages or any
damages whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action, arising
out of or in connection with the use or performance of this software.
.SH ACKNOWLEDGEMENTS
Paul Raveling, USC Information Sciences Institute, for the original
idea of using space subdivision for the color reduction algorithm.
With Paul's permission, this document is an adaptation from a document he
wrote.
.SH AUTHORS
John Cristy, E.I. du Pont de Nemours & Company Incorporated
SHAR_EOF
chmod 0644 ImageMagick/quantize.man ||
echo 'restore of ImageMagick/quantize.man failed'
Wc_c="`wc -c < 'ImageMagick/quantize.man'`"
test 11043 -eq "$Wc_c" ||
    echo 'ImageMagick/quantize.man: original size 11043, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/compress.h ==============
if test -f 'ImageMagick/compress.h' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/compress.h (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/compress.h (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/compress.h' &&
/*
X  Compress utility routines.
*/
extern unsigned int
X  HuffmanEncodeImage _Declare((Image *)),
X  LZWDecodeImage _Declare((Image *)),
X  LZWEncodeImage _Declare((Image *,unsigned int)),
X  QDecodeImage _Declare((unsigned char *,unsigned char *,unsigned int,
X    unsigned int)),
X  QEncodeImage _Declare((unsigned char *,unsigned char *,unsigned int,
X    unsigned int));
SHAR_EOF
chmod 0644 ImageMagick/compress.h ||
echo 'restore of ImageMagick/compress.h failed'
Wc_c="`wc -c < 'ImageMagick/compress.h'`"
test 368 -eq "$Wc_c" ||
    echo 'ImageMagick/compress.h: original size 368, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/XWDFile.h ==============
if test -f 'ImageMagick/XWDFile.h' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/XWDFile.h (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/XWDFile.h (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/XWDFile.h' &&
/* Copyright 1985, 1986, Massachusetts Institute of Technology */
X
/* $XConsortium: XWDFile.h,v 1.12 89/10/08 16:33:57 rws Exp $ */
/*
X * XWDFile.h    MIT Project Athena, X Window system window raster
X *        image dumper, dump file format header file.
X *
X *  Author:    Tony Della Fera, DEC
X *        27-Jun-85
X *
X * Modifier:    William F. Wyatt, SAO
X *              18-Nov-86  - version 6 for saving/restoring color maps
X */
X
X
/*
X * This is not portable between machines of differing word sizes.  To make
X * it portable, do the following things:
X *
X *     o  #include <X11/Xmd.h>
X *     o  remove the typedef for xwdval
X *     o  replace all instances of xwdval with the appropriate CARD32 ... B32
X *     o  make sure that XWDFileHeader is padded to quadword boundaries
X *     o  make sure the window name is written out quadword aligned
X *     o  create an XWDColor structure that contains the same fields as XColor
X *        but which is defined in terms of CARD32 B32, CARD16 B16, and CARD8
X *     o  convert XColor structures to XWDColor structures in xwd
X *     o  remove all xwdval casts from xwd
X *     o  pack image data before writing out if necessary
X *     o  replace casts from xwdval objects in xwud with cvtINT macros
X *     o  convert XWDColor structures to XColor structures
X *     o  unpack data after reading in if necessary
X */
X
X
#include <X11/Xmd.h>
X
#define XWD_FILE_VERSION 7
#ifdef WORD64
#define sz_XWDheader 104
#else
#define sz_XWDheader 100
#endif
#define sz_XWDColor 12
X
typedef CARD32 xwdval;        /* for old broken programs */
X
typedef struct _xwd_file_header {
X    CARD32 header_size B32;  /* Size of the entire file header (bytes). */
X    CARD32 file_version B32;    /* XWD_FILE_VERSION */
X    CARD32 pixmap_format B32;    /* Pixmap format */
X    CARD32 pixmap_depth B32;    /* Pixmap depth */
X    CARD32 pixmap_width B32;    /* Pixmap width */
X    CARD32 pixmap_height B32;    /* Pixmap height */
X    CARD32 xoffset B32;        /* Bitmap x offset */
X    CARD32 byte_order B32;        /* MSBFirst, LSBFirst */
X    CARD32 bitmap_unit B32;        /* Bitmap unit */
X    CARD32 bitmap_bit_order B32;    /* MSBFirst, LSBFirst */
X    CARD32 bitmap_pad B32;        /* Bitmap scanline pad */
X    CARD32 bits_per_pixel B32;    /* Bits per pixel */
X    CARD32 bytes_per_line B32;    /* Bytes per scanline */
X    CARD32 visual_class B32;    /* Class of colormap */
X    CARD32 red_mask B32;        /* Z red mask */
X    CARD32 green_mask B32;        /* Z green mask */
X    CARD32 blue_mask B32;        /* Z blue mask */
X    CARD32 bits_per_rgb B32;    /* Log2 of distinct color values */
X    CARD32 colormap_entries B32;    /* Number of entries in colormap */
X    CARD32 ncolors B32;        /* Number of Color structures */
X    CARD32 window_width B32;    /* Window width */
X    CARD32 window_height B32;    /* Window height */
X    CARD32 window_x B32;        /* Window upper left X coordinate */
X    CARD32 window_y B32;        /* Window upper left Y coordinate */
X    CARD32 window_bdrwidth B32;    /* Window border width */
#ifdef WORD64
X    CARD32 header_end B32;        /* Pad to fill out word */
#endif
} XWDFileHeader;
X
struct {
X        CARD32    pixel B32;
X        CARD16    red B16;
X    CARD16    green B16;
X    CARD16    blue B16;
X        CARD8    flags;
X        CARD8    pad;
} XWDColor;
SHAR_EOF
chmod 0644 ImageMagick/XWDFile.h ||
echo 'restore of ImageMagick/XWDFile.h failed'
Wc_c="`wc -c < 'ImageMagick/XWDFile.h'`"
test 3092 -eq "$Wc_c" ||
    echo 'ImageMagick/XWDFile.h: original size 3092, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/alien.h ==============
if test -f 'ImageMagick/alien.h' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/alien.h (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/alien.h (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/alien.h' &&
X
/*
X  Typedef declarations.
*/
typedef struct _AlienInfo
{
X  char
X    filename[2048];
X
X  char
X    *server_name,
X    *font,
X    *geometry,
X    *density;
X
X  unsigned int
X    verbose;
} AlienInfo;
X
/*
X  Alien image format routines.
*/
extern Image
X  *ReadAlienImage _Declare((AlienInfo *));
X
extern unsigned int
X  WriteAlienImage _Declare((Image *));
X
extern void
X  GetAlienInfo _Declare((AlienInfo *));
SHAR_EOF
chmod 0644 ImageMagick/alien.h ||
echo 'restore of ImageMagick/alien.h failed'
Wc_c="`wc -c < 'ImageMagick/alien.h'`"
test 403 -eq "$Wc_c" ||
    echo 'ImageMagick/alien.h: original size 403, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/SYNOPSIS ==============
if test -f 'ImageMagick/SYNOPSIS' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/SYNOPSIS (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/SYNOPSIS (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/SYNOPSIS' &&
ImageMagick is a collection of X11 image processing and display utilities.  It
is available on export.lcs.mit.edu as contrib/ImageMagick.tar.Z.
X
[e-mail]
X
---
X
Display
X
X     Display is a machine architecture independent image
X     processing and display program.  It can display an image on
X     any workstation display running an X server.  Display first
X     determines the hardware capabilities of the workstation.  If
X     the number of unique colors in the image is less than or
X     equal to the number the workstation can support, the image
X     is displayed in an X window.  Otherwise the number of colors
X     in the image is first reduced to match the color resolution
X     of the workstation before it is displayed.
X
X     This means that a continuous-tone 24 bits/pixel image can
X     display on a 8 bit pseudo-color device or monochrome device.
X     In most instances the reduced color image closely resembles
X     the original.  Alternatively, a monochrome or pseudo-color
X     image can display on a continuous-tone 24 bits/pixels
X     device.
X
X
Import
X
X     Import reads an image from any visible window on an X server
X     and outputs it as an image file.  You can capture a single
X     window, the entire screen, or any rectangular portion of the
X     screen.  You can use display (see display(1)) utility for
X     redisplay, printing, editing, formatting, archiving, image
X     processing, etc. of the captured image.
X
X     The target window can be specified by id, name, or may be
X     selected by clicking the mouse in the desired window.  If
X     you press a button and then drag, a rectangle will form
X     which expands and contracts as the mouse moves.  To save the
X     portion of the screen  defined by the rectangle, just
X     release the button.  The keyboard bell is rung once at the
X     beginning of the screen capture and twice when it completes.
X
X
XXtoPS
X
X     XtoPS reads an image from any visible window on an X server
X     and outputs it as Encapsulated Postscript.  You can capture
X     a single window, the entire screen, or any rectangular
X     portion of the screen.  You can view the captured screen
X     with any Postscript compatible viewer or printer.  The
X     Postscript is displayed in color on viewers or printers that
X     support color, otherwise it is displayed as grayscale.
X
X     The target window can be specified by id, name, or may be
X     selected by clicking the mouse in the desired window.  If
X     you press a button and then drag, a rectangle will form
X     which expands and contracts as the mouse moves.  To save the
X     portion of the screen defined by the rectangle, just release
X     the button.  The keyboard bell is rung once at the beginning
X     of the screen capture and twice it completes.
X
X
Animate
X
X     Animate displays a sequence of images on any workstation
X     display running an X server.  Animate first determines the
X     hardware capabilities of the workstation.  If the number of
X     unique colors in an image is less than or equal to the
X     number the workstation can support, the image is displayed
X     in an X window.  Otherwise the number of colors in the image
X     is first reduced to match the color resolution of the
X     workstation before it is displayed.
X
X     This means that a continuous-tone 24 bits/pixel image can
X     display on a 8 bit pseudo-color device or monochrome device.
X     In most instances the reduced color image closely resembles
X     the original.  Alternatively, a monochrome or pseudo-color
X     image sequence can display on a continuous-tone 24
X     bits/pixels device.
X
X
Montage
X
X     Montage creates a composite image by combining several
X     separate images.  The images are tiled on the composite
X     image with the name of the image optionally appearing just
X     below the individual tile.
X
X
Mogrify
X
X     Mogrify transforms an image or a sequence of images.  These
X     transforms include image scaling, image rotation, color
X     reduction, and others.  The transmogrified image overwrites
X     the original image.
X
X
Convert
X
X     Convert converts an input file using one image format to an
X     output file with a differing image format. By default, the
X     image format is determined by it's magic number. To specify
X     a particular image format, precede the filename with an
X     image format name and a colon (i.e.  mtv:image) or specify
X     the image type as the filename suffix (i.e. image.mtv).
X     Specify file as - for standard input or output.  If file has
X     the extension .Z, the file is decoded with uncompress.
X
X     Convert recognizes the following image formats:
X
X       Tag       Description
X       ----------------------------------------------------
X       AVS
X       CMYK      Raw cyan, magenta, yellow, and black bytes
X       FAX       Group 3
X       GIF
X       GRAY      Raw gray bytes
X       JPEG
X       MIFF      Machine Independant file format
X       MTV
X       PNM       Portable bitmap
X       PS        Postscript
X       RGB       Raw red, green, and blue bytes
X       RLE       Utah Raster Toolkit
X       SUN       SUN raster
X       TEXT      raw text file; read only
X       TIFF      Tagged Image File Format
X       VICAR
X       X         select image from X server screen; read only
X       XC        constant image of X server background color
X       XBM       X11 bitmap
X       XWD       X11 window dump
X
XXTP
X
X     Xtp is a utility for retrieving, listing, or printing files
X     from a remote network site, or sending files to a remote
X     network site.  Xtp performs most of the same functions as
X     the ftp program, but does not require any interactive
X     commands.  You simply specify the file transfer task on the
X     command line and xtp performs the task automatically.
SHAR_EOF
chmod 0644 ImageMagick/SYNOPSIS ||
echo 'restore of ImageMagick/SYNOPSIS failed'
Wc_c="`wc -c < 'ImageMagick/SYNOPSIS'`"
test 5765 -eq "$Wc_c" ||
    echo 'ImageMagick/SYNOPSIS: original size 5765, current size' "$Wc_c"
rm -f _shar_wnt_.tmp
fi
# ============= ImageMagick/utilities/mogrify.c ==============
if test ! -d 'ImageMagick/utilities'; then
    echo 'x - creating directory ImageMagick/utilities'
    mkdir 'ImageMagick/utilities'
fi
if test -f 'ImageMagick/utilities/mogrify.c' -a X"$1" != X"-c"; then
    echo 'x - skipping ImageMagick/utilities/mogrify.c (File already exists)'
    rm -f _shar_wnt_.tmp
else
> _shar_wnt_.tmp
echo 'x - extracting ImageMagick/utilities/mogrify.c (Text)'
sed 's/^X//' << 'SHAR_EOF' > 'ImageMagick/utilities/mogrify.c' &&
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%              M   M   OOO    GGGG  RRRR   IIIII  FFFFF  Y   Y                %
%              MM MM  O   O  G      R   R    I    F       Y Y                 %
%              M M M  O   O  G GG   RRRRR    I    FFF      Y                  %
%              M   M  O   O  G   G  R R      I    F        Y                  %
%              M   M   OOO    GGG   R  R   IIIII  F        Y                  %
%                                                                             %
%                                                                             %
%               Transmogrify an Image or Sequence of Images.                  %
%                                                                             %
%                                                                             %
%                                                                             %
%                           Software Design                                   %
%                             John Cristy                                     %
%                            December 1992                                    %
%                                                                             %
%                                                                             %
%  Copyright 1992 E. I. du Pont de Nemours & Company                          %
%                                                                             %
%  Permission to use, copy, modify, distribute, and sell this software and    %
%  its documentation for any purpose is hereby granted without fee,           %
%  provided that the above Copyright notice appear in all copies and that     %
%  both that Copyright notice and this permission notice appear in            %
%  supporting documentation, and that the name of E. I. du Pont de Nemours    %
%  & Company not be used in advertising or publicity pertaining to            %
%  distribution of the software without specific, written prior               %
%  permission.  E. I. du Pont de Nemours & Company makes no representations   %
%  about the suitability of this software for any purpose.  It is provided    %
%  "as is" without express or implied warranty.                               %
%                                                                             %
%  E. I. du Pont de Nemours & Company disclaims all warranties with regard    %
%  to this software, including all implied warranties of merchantability      %
%  and fitness, in no event shall E. I. du Pont de Nemours & Company be       %
%  liable for any special, indirect or consequential damages or any           %
%  damages whatsoever resulting from loss of use, data or profits, whether    %
%  in an action of contract, negligence or other tortious action, arising     %
%  out of or in connection with the use or performance of this software.      %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  `Mogrify' applies one or more image transforms to an image or sequence of
%   images and overwrites the original image.
%
%  The Mogrify program command syntax is:
%
%  Usage: mogrify [options ...] file [ [options ...] file ...]
%
%  Where options include:
%    -clip geometry      preferred size and location of the clipped image
%    -colormap filename  transform image colors to match this set of colors
%    -colors value       preferred number of colors in the image
%    -colorspace type    GRAY, RGB, XYZ, YIQ, or YUV
%    -compress type      RunlengthEncoded or QEncoded
%    -density geometry   vertical and horizonal density of the image
%    -display server     obtain image or font from this X server
%    -dither             apply Floyd/Steinberg error diffusion to image
%    -enhance            apply a digital filter to enhance a noisy image
%    -gamma value        level of gamma correction
%    -geometry geometry  preferred size of the image
%    -monochrome         transform image to black and white
%    -noise              reduce noise with a noise peak elimination filter
%    -normalize          tranform image to span the full range of colors
%    -reflect            reverse image scanlines
%    -rotate degrees     apply Paeth rotation to the image
%    -scale geometry     preferred size factors of the image
%    -scene value        image scene number
%    -treedepth value    depth of the color classification tree
%    -verbose            print detailed information about the image
%
%  Change '-' to '+' in any option above to reverse its effect.  For
%  example, specify +compress to store the image as uncompressed.
%
%  By default, the image format of `file' is determined by its magic
%  number.  To specify a particular image format, precede the filename
%  with an image format name and a colon (i.e. mtv:image) or specify the
%  image type as the filename suffix (i.e. image.mtv).  Specify 'file' as
%  '-' for standard input or output.
%
%
*/
X
/*
X  Include declarations.
*/
#include "display.h"
#include "image.h"
#include "alien.h"
#include "X.h"
X
/*
X  Global declarations.
*/
char
X  *application_name;
X
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   E r r o r                                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Function Error displays an error message and then terminates the program.
%
%  The format of the Error routine is:
%
%      Error(message,qualifier)
%
%  A description of each parameter follows:
%
%    o message: Specifies the message to display before terminating the
%      program.
%
%    o qualifier: Specifies any qualifier to the message.
%
%
*/
void Error(message,qualifier)
char
X  *message,
X  *qualifier;
{
X  (void) fprintf(stderr,"%s: %s",application_name,message);
X  if (qualifier != (char *) NULL)
X    (void) fprintf(stderr," (%s)",qualifier);
X  (void) fprintf(stderr,".\n");
X  exit(1);
}
X
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   U s a g e                                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Function Usage displays the program command syntax.
%
%  The format of the Usage routine is:
%
%      Usage()
%
%
*/
static void Usage()
{
X  char
X    **p;
X
X  static char
X    *options[]=
X    {
X      "-clip geometry      preferred size and location of the clipped image",
X      "-colormap filename  transform image colors to match this set of colors",
X      "-colors value       preferred number of colors in the image",
X      "-colorspace type    GRAY, RGB, XYZ, YIQ, or YUV",
X      "-compress type      RunlengthEncoded or QEncoded",
X      "-density geometry   vertical and horizonal density of the image",
X      "-display server     obtain image or font from this X server",
X      "-dither             apply Floyd/Steinberg error diffusion to image",
X      "-enhance            apply a digital filter to enhance a noisy image",
X      "-gamma value        level of gamma correction",
X      "-geometry geometry  preferred size of the image",
X      "-monochrome         transform image to black and white",
X      "-noise              reduce noise with a noise peak elimination filter",
X      "-normalize          tranform image to span the full range of colors",
X      "-reflect            reflect the image scanlines",
X      "-rotate degrees     apply Paeth rotation to the image",
X      "-scale geometry     preferred size factors of the image",
X      "-scene number       image scene number",
X      "-treedepth value    depth of the color classification tree",
X      "-verbose            print detailed information about the image",
X      (char *) NULL
X    };
X  (void) fprintf(stderr,
X    "Usage: %s [-options ...] file [ [-options ...] file ...]\n",
X    application_name);
X  (void) fprintf(stderr,"\nWhere options include: \n");
X  for (p=options; *p != (char *) NULL; p++)
X    (void) fprintf(stderr,"  %s\n",*p);
X  (void) fprintf(stderr,
X    "\nChange '-' to '+' in any option above to reverse its effect.  For\n");
X  (void) fprintf(stderr,
X    "example, specify +compress to store the image as uncompressed.\n");
X  (void) fprintf(stderr,
X    "\nBy default, the image format of `file' is determined by its magic\n");
X  (void) fprintf(stderr,
X    "number.  To specify a particular image format, precede the filename\n");
X  (void) fprintf(stderr,
X    "with an image format name and a colon (i.e. mtv:image) or specify the\n");
X  (void) fprintf(stderr,
X    "image type as the filename suffix (i.e. image.mtv).  Specify 'file' as\n");
X  (void) fprintf(stderr,"'-' for standard input or output.\n");
X  exit(1);
}
X
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%    M a i n                                                                  %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
int main(argc,argv)
int
X  argc;
X
char
X  **argv;
{
X  AlienInfo
X    alien_info;
X
X  char
X    *clip_geometry,
X    *colormap_filename,
X    *image_geometry,
X    *option,
X    *scale_geometry;
X
X  double
X    gamma;
X
X  Image
X    **images;
X
X  int
X    degrees,
X    i,
X    x;
X
X  unsigned int
X    colorspace,
X    compression,
X    dither,
X    enhance,
X    image_number,
X    inverse,
X    maximum_images,
X    monochrome,
X    noise,
X    normalize,
X    number_colors,
X    reflect,
X    scene,
X    tree_depth,
X    verbose;
X
X  /*
X    Display usage profile if there are no command line arguments.
X  */
X  application_name=(*argv);
X  if (argc < 2)
X    Usage();
X  /*
X    Set defaults.
X  */
X  GetAlienInfo(&alien_info);
X  clip_geometry=(char *) NULL;
X  colormap_filename=(char *) NULL;
X  colorspace=RGBColorspace;
X  compression=UndefinedCompression;
X  degrees=0;
X  dither=False;
X  enhance=False;
X  gamma=0.0;
X  image_geometry=(char *) NULL;
X  inverse=False;
X  monochrome=False;
X  noise=False;
X  normalize=False;
X  number_colors=0;
X  reflect=False;
X  scale_geometry=(char *) NULL;
X  scene=0;
X  tree_depth=0;
X  verbose=False;
X  maximum_images=2048;
X  images=(Image **) malloc(maximum_images*sizeof(Image *));
X  if (images == (Image **) NULL)
X    Error("unable to mogrify images","memory allocation failed");
X  /*
X    Parse command line.
X  */
X  image_number=0;
X  for (i=1; i < argc; i++)
X  {
X    option=argv[i];
X    if (((int) strlen(option) > 1) && ((*option == '-') || (*option == '+')))
X      switch (*(option+1))
X      {
X        case 'c':
X        {
X          if (strncmp("clip",option+1,2) == 0)
X            {
X              clip_geometry=(char *) NULL;
X              if (*option == '-')
X                {
X                  i++;
X                  if (i == argc)
X                    Error("missing geometry on -clip",(char *) NULL);
X                  clip_geometry=argv[i];
X                }
X              break;
X            }
X          if (strncmp("colormap",option+1,7) == 0)
X            {
X              colormap_filename=(char *) NULL;
X              if (*option == '-')
X                {
X                  i++;
X                  if (i == argc)
X                    Error("missing file name on -colormap",(char *) NULL);
X                  colormap_filename=argv[i];
X                }
X              break;
X            }
X          if (strncmp("colors",option+1,7) == 0)
X            {
X              number_colors=0;
X              if (*option == '-')
X                {
X                  i++;
X                  if ((i == argc) || !sscanf(argv[i],"%d",&x))
X                    Error("missing colors on -colors",(char *) NULL);
X                  number_colors=atoi(argv[i]);
X                }
X              break;
X            }
X          if (strncmp("colorspace",option+1,7) == 0)
X            {
X              colorspace=RGBColorspace;
X              if (*option == '-')
X                {
X                  i++;
X                  if (i == argc)
X                    Error("missing type on -colorspace",(char *) NULL);
X                  option=argv[i];
X                  colorspace=UndefinedColorspace;
X                  if (Latin1Compare("gray",option) == 0)
X                    colorspace=GRAYColorspace;
X                  if (Latin1Compare("rgb",option) == 0)
X                    colorspace=RGBColorspace;
SHAR_EOF
true || echo 'restore of ImageMagick/utilities/mogrify.c failed'
fi
echo 'End of  part 24'
echo 'File ImageMagick/utilities/mogrify.c is continued in part 25'
echo 25 > _shar_seq_.tmp
exit 0
exit 0 # Just in case...