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.\" ========================================================================
.\"
.IX Title "Imager 3pm"
.TH Imager 3pm 2024-04-13 "perl v5.38.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
Imager \- Perl extension for Generating 24 bit Images
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&  # Thumbnail example
\&
\&  #!/usr/bin/perl \-w
\&  use strict;
\&  use Imager;
\&
\&  die "Usage: thumbmake.pl filename\en" if !\-f $ARGV[0];
\&  my $file = shift;
\&
\&  my $format;
\&
\&  # see Imager::Files for information on the read() method
\&  my $img = Imager\->new(file=>$file)
\&    or die Imager\->errstr();
\&
\&  $file =~ s/\e.[^.]*$//;
\&
\&  # Create smaller version
\&  # documented in Imager::Transformations
\&  my $thumb = $img\->scale(scalefactor=>.3);
\&
\&  # Autostretch individual channels
\&  $thumb\->filter(type=>\*(Aqautolevels\*(Aq);
\&
\&  # try to save in one of these formats
\&  SAVE:
\&
\&  for $format ( qw( png gif jpeg tiff ppm ) ) {
\&    # Check if given format is supported
\&    if ($Imager::formats{$format}) {
\&      $file.="_low.$format";
\&      print "Storing image as: $file\en";
\&      # documented in Imager::Files
\&      $thumb\->write(file=>$file) or
\&        die $thumb\->errstr;
\&      last SAVE;
\&    }
\&  }
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Imager is a module for creating and altering images.  It can read and
write various image formats, draw primitive shapes like lines,and
polygons, blend multiple images together in various ways, scale, crop,
render text and more.
.SS "Overview of documentation"
.IX Subsection "Overview of documentation"
.IP \(bu 4
Imager \- This document \- Synopsis, Example, Table of Contents and
Overview.
.IP \(bu 4
Imager::Install \- installation notes for Imager.
.IP \(bu 4
Imager::Tutorial \- a brief introduction to Imager.
.IP \(bu 4
Imager::Cookbook \- how to do various things with Imager.
.IP \(bu 4
Imager::ImageTypes \- Basics of constructing image objects with
\&\f(CWnew()\fR: Direct type/virtual images, RGB(A)/paletted images,
8/16/double bits/channel, color maps, channel masks, image tags, color
quantization.  Also discusses basic image information methods.
.IP \(bu 4
Imager::Files \- IO interaction, reading/writing images, format
specific tags.
.IP \(bu 4
Imager::Draw \- Drawing Primitives, lines, boxes, circles, arcs,
flood fill.
.IP \(bu 4
Imager::Color \- Color specification.
.IP \(bu 4
Imager::Fill \- Fill pattern specification.
.IP \(bu 4
Imager::Font \- General font rendering, bounding boxes and font
metrics.
.IP \(bu 4
Imager::Transformations \- Copying, scaling, cropping, flipping,
blending, pasting, convert and map.
.IP \(bu 4
Imager::Engines \- Programmable transformations through
\&\f(CWtransform()\fR, \f(CWtransform2()\fR and \f(CWmatrix_transform()\fR.
.IP \(bu 4
Imager::Filters \- Filters, sharpen, blur, noise, convolve etc. and
filter plug-ins.
.IP \(bu 4
Imager::Expr \- Expressions for evaluation engine used by
\&\fBtransform2()\fR.
.IP \(bu 4
Imager::Matrix2d \- Helper class for affine transformations.
.IP \(bu 4
Imager::Fountain \- Helper for making gradient profiles.
.IP \(bu 4
Imager::IO \- Imager I/O abstraction.
.IP \(bu 4
Imager::API \- using Imager's C API
.IP \(bu 4
Imager::APIRef \- API function reference
.IP \(bu 4
Imager::Inline \- using Imager's C API from Inline::C
.IP \(bu 4
Imager::ExtUtils \- tools to get access to Imager's C API.
.IP \(bu 4
Imager::Security \- brief security notes.
.IP \(bu 4
Imager::Threads \- brief information on working with threads.
.SS "Basic Overview"
.IX Subsection "Basic Overview"
An Image object is created with \f(CW\*(C`$img = Imager\->new()\*(C'\fR.
Examples:
.PP
.Vb 4
\&  $img=Imager\->new();                         # create empty image
\&  $img\->read(file=>\*(Aqlena.png\*(Aq,type=>\*(Aqpng\*(Aq) or # read image from file
\&     die $img\->errstr();                      # give an explanation
\&                                              # if something failed
.Ve
.PP
or if you want to create an empty image:
.PP
.Vb 1
\&  $img=Imager\->new(xsize=>400,ysize=>300,channels=>4);
.Ve
.PP
This example creates a completely black image of width 400 and height
300 and 4 channels.
.SH "ERROR HANDLING"
.IX Header "ERROR HANDLING"
In general a method will return false when it fails, if it does use
the \f(CWerrstr()\fR method to find out why:
.IP \fBerrstr()\fR 4
.IX Item "errstr()"
Returns the last error message in that context.
.Sp
If the last error you received was from calling an object method, such
as read, call \fBerrstr()\fR as an object method to find out why:
.Sp
.Vb 3
\&  my $image = Imager\->new;
\&  $image\->read(file => \*(Aqsomefile.gif\*(Aq)
\&     or die $image\->errstr;
.Ve
.Sp
If it was a class method then call \fBerrstr()\fR as a class method:
.Sp
.Vb 2
\&  my @imgs = Imager\->read_multi(file => \*(Aqsomefile.gif\*(Aq)
\&    or die Imager\->errstr;
.Ve
.Sp
Note that in some cases object methods are implemented in terms of
class methods so a failing object method may set both.
.PP
The \f(CW\*(C`Imager\->new\*(C'\fR method is described in detail in
Imager::ImageTypes.
.SH "METHOD INDEX"
.IX Header "METHOD INDEX"
Where to find information on methods for Imager class objects.
.PP
\&\fBaddcolors()\fR \- "\fBaddcolors()\fR" in Imager::ImageTypes \- add colors to a
paletted image
.PP
\&\fBadd_file_magic()\fR \- "\fBadd_file_magic()\fR" in Imager::Files \- add magic to
Imager's file type detector.
.PP
\&\fBaddtag()\fR \-  "\fBaddtag()\fR" in Imager::ImageTypes \- add image tags
.PP
\&\fBadd_type_extensions()\fR \- "\fBadd_file_magic()\fR" in Imager::Files \- add magic
for new image file types.
.PP
"add_type_extensions($type, \f(CW$ext\fR, ...)" in Imager::Files \- add extensions for
new image file types.
.PP
\&\fBalign_string()\fR \- "\fBalign_string()\fR" in Imager::Draw \- draw text aligned on a
point
.PP
\&\fBalphachannel()\fR \- "\fBalphachannel()\fR" in Imager::ImageTypes \- return the
channel index of the alpha channel (if any).
.PP
\&\fBarc()\fR \- "\fBarc()\fR" in Imager::Draw \- draw a filled arc
.PP
\&\fBbits()\fR \- "\fBbits()\fR" in Imager::ImageTypes \- number of bits per sample for the
image
.PP
\&\fBbox()\fR \- "\fBbox()\fR" in Imager::Draw \- draw a filled or outline box.
.PP
\&\fBcheck_file_limits()\fR \- "\fBcheck_file_limits()\fR" in Imager::Files
.PP
\&\fBcircle()\fR \- "\fBcircle()\fR" in Imager::Draw \- draw a filled circle
.PP
\&\fBclose_log()\fR \- "\fBclose_log()\fR" in Imager::ImageTypes \- close the Imager
debugging log.
.PP
\&\fBcolorchannels()\fR \- "\fBcolorchannels()\fR" in Imager::ImageTypes \- the number
of channels used for color.
.PP
\&\fBcolorcount()\fR \- "\fBcolorcount()\fR" in Imager::ImageTypes \- the number of
colors in an image's palette (paletted images only)
.PP
\&\fBcolormodel()\fR \- "\fBcolorcount()\fR" in Imager::ImageTypes \- how color is
represented.
.PP
\&\fBcombine()\fR \- "\fBcombine()\fR" in Imager::Transformations \- combine channels
from one or more images.
.PP
\&\fBcombines()\fR \- "\fBcombines()\fR" in Imager::Draw \- return a list of the
different combine type keywords
.PP
\&\fBcompose()\fR \- "\fBcompose()\fR" in Imager::Transformations \- compose one image
over another.
.PP
\&\fBconvert()\fR \- "\fBconvert()\fR" in Imager::Transformations \- transform the color
space
.PP
\&\fBcopy()\fR \- "\fBcopy()\fR" in Imager::Transformations \- make a duplicate of an
image
.PP
\&\fBcrop()\fR \- "\fBcrop()\fR" in Imager::Transformations \- extract part of an image
.PP
\&\fBdef_guess_type()\fR \- "\fBdef_guess_type()\fR" in Imager::Files \- default function
used to guess the output file format based on the output file name
.PP
\&\fBdeltag()\fR \-  "\fBdeltag()\fR" in Imager::ImageTypes \- delete image tags
.PP
\&\fBdifference()\fR \- "\fBdifference()\fR" in Imager::Filters \- produce a difference
images from two input images.
.PP
\&\fBerrstr()\fR \- "\fBerrstr()\fR" \- the error from the last failed operation.
.PP
\&\fBfilter()\fR \- "\fBfilter()\fR" in Imager::Filters \- image filtering
.PP
\&\fBfindcolor()\fR \- "\fBfindcolor()\fR" in Imager::ImageTypes \- search the image
palette, if it has one
.PP
\&\fBflip()\fR \- "\fBflip()\fR" in Imager::Transformations \- flip an image, vertically,
horizontally
.PP
\&\fBflood_fill()\fR \- "\fBflood_fill()\fR" in Imager::Draw \- fill an enclosed or same
color area
.PP
\&\fBgetchannels()\fR \- "\fBgetchannels()\fR" in Imager::ImageTypes \- the number of
samples per pixel for an image
.PP
\&\fBgetcolorcount()\fR \- "\fBgetcolorcount()\fR" in Imager::ImageTypes \- the number of
different colors used by an image (works for direct color images)
.PP
\&\fBgetcolors()\fR \- "\fBgetcolors()\fR" in Imager::ImageTypes \- get colors from the image
palette, if it has one
.PP
\&\fBgetcolorusage()\fR \- "\fBgetcolorusage()\fR" in Imager::ImageTypes
.PP
\&\fBgetcolorusagehash()\fR \- "\fBgetcolorusagehash()\fR" in Imager::ImageTypes
.PP
\&\fBget_file_limits()\fR \- "\fBget_file_limits()\fR" in Imager::Files
.PP
\&\fBgetheight()\fR \- "\fBgetheight()\fR" in Imager::ImageTypes \- height of the image in
pixels
.PP
\&\fBgetmask()\fR \- "\fBgetmask()\fR" in Imager::ImageTypes \- write mask for the image
.PP
\&\fBgetpixel()\fR \- "\fBgetpixel()\fR" in Imager::Draw \- retrieve one or more pixel
colors
.PP
\&\fBgetsamples()\fR \- "\fBgetsamples()\fR" in Imager::Draw \- retrieve samples from a
row or partial row of pixels.
.PP
\&\fBgetscanline()\fR \- "\fBgetscanline()\fR" in Imager::Draw \- retrieve colors for a
row or partial row of pixels.
.PP
\&\fBgetwidth()\fR \- "\fBgetwidth()\fR" in Imager::ImageTypes \- width of the image in
pixels.
.PP
\&\fBimg_set()\fR \- "\fBimg_set()\fR" in Imager::ImageTypes \- re-use an Imager object
for a new image.
.PP
\&\fBinit()\fR \- "\fBinit()\fR" in Imager::ImageTypes
.PP
\&\fBis_bilevel()\fR \- "\fBis_bilevel()\fR" in Imager::ImageTypes \- returns whether
image write functions should write the image in their bilevel (blank
and white, no gray levels) format
.PP
\&\fBis_logging()\fR \- "\fBis_logging()\fR" in Imager::ImageTypes \- test if the debug
log is active.
.PP
\&\fBline()\fR \- "\fBline()\fR" in Imager::Draw \- draw an interval
.PP
\&\fBload_plugin()\fR \- "\fBload_plugin()\fR" in Imager::Filters
.PP
\&\fBlog()\fR \- "\fBlog()\fR" in Imager::ImageTypes \- send a message to the debugging
log.
.PP
\&\fBmake_palette()\fR \- "\fBmake_palette()\fR" in Imager::ImageTypes \- produce a
color palette from one or more input images.
.PP
\&\fBmap()\fR \- "\fBmap()\fR" in Imager::Transformations \- remap color
channel values
.PP
\&\fBmasked()\fR \-  "\fBmasked()\fR" in Imager::ImageTypes \- make a masked image
.PP
\&\fBmatrix_transform()\fR \- "\fBmatrix_transform()\fR" in Imager::Engines
.PP
\&\fBmaxcolors()\fR \- "\fBmaxcolors()\fR" in Imager::ImageTypes
.PP
\&\fBNC()\fR \- "\fBNC()\fR" in Imager::Handy
.PP
\&\fBNCF()\fR \- "\fBNCF()\fR" in Imager::Handy
.PP
\&\fBnew()\fR \- "\fBnew()\fR" in Imager::ImageTypes
.PP
\&\fBnewcolor()\fR \- "\fBnewcolor()\fR" in Imager::Handy
.PP
\&\fBnewcolour()\fR \- "\fBnewcolour()\fR" in Imager::Handy
.PP
\&\fBnewfont()\fR \- "\fBnewfont()\fR" in Imager::Handy
.PP
\&\fBNF()\fR \- "\fBNF()\fR" in Imager::Handy
.PP
\&\fBopen()\fR \- "\fBread()\fR" in Imager::Files \- an alias for \fBread()\fR
.PP
\&\fBopen_log()\fR \- "\fBopen_log()\fR" in Imager::ImageTypes \- open the debug log.
.PP
\&\fBparseiptc()\fR \- "\fBparseiptc()\fR" in Imager::Files \- parse IPTC data from a JPEG
image
.PP
\&\fBpaste()\fR \- "\fBpaste()\fR" in Imager::Transformations \- draw an image onto an
image
.PP
\&\fBpolygon()\fR \- "\fBpolygon()\fR" in Imager::Draw
.PP
\&\fBpolyline()\fR \- "\fBpolyline()\fR" in Imager::Draw
.PP
\&\fBpolypolygon()\fR \- "\fBpolypolygon()\fR" in Imager::Draw
.PP
\&\fBpreload()\fR \- "\fBpreload()\fR" in Imager::Files
.PP
\&\fBread()\fR \- "\fBread()\fR" in Imager::Files \- read a single image from an image file
.PP
\&\fBread_multi()\fR \- "\fBread_multi()\fR" in Imager::Files \- read multiple images from an image
file
.PP
\&\fBread_types()\fR \- "\fBread_types()\fR" in Imager::Files \- list image types Imager
can read.
.PP
\&\fBregister_filter()\fR \- "\fBregister_filter()\fR" in Imager::Filters
.PP
\&\fBregister_reader()\fR \- "\fBregister_reader()\fR" in Imager::Files
.PP
\&\fBregister_writer()\fR \- "\fBregister_writer()\fR" in Imager::Files
.PP
\&\fBrgb_difference()\fR \- "\fBrgb_difference()\fR" in Imager::Filters \- produce a difference
images from two input images.
.PP
\&\fBrotate()\fR \- "\fBrotate()\fR" in Imager::Transformations
.PP
\&\fBrubthrough()\fR \- "\fBrubthrough()\fR" in Imager::Transformations \- draw an image
onto an image and use the alpha channel
.PP
\&\fBscale()\fR \- "\fBscale()\fR" in Imager::Transformations
.PP
\&\fBscale_calculate()\fR \- "\fBscale_calculate()\fR" in Imager::Transformations
.PP
\&\fBscaleX()\fR \- "\fBscaleX()\fR" in Imager::Transformations
.PP
\&\fBscaleY()\fR \- "\fBscaleY()\fR" in Imager::Transformations
.PP
\&\fBsetcolors()\fR \- "\fBsetcolors()\fR" in Imager::ImageTypes \- set palette colors
in a paletted image
.PP
\&\fBset_file_limits()\fR \- "\fBset_file_limits()\fR" in Imager::Files
.PP
\&\fBsetmask()\fR \- "\fBsetmask()\fR" in Imager::ImageTypes
.PP
\&\fBsetpixel()\fR \- "\fBsetpixel()\fR" in Imager::Draw
.PP
\&\fBsetsamples()\fR \- "\fBsetsamples()\fR" in Imager::Draw
.PP
\&\fBsetscanline()\fR \- "\fBsetscanline()\fR" in Imager::Draw
.PP
\&\fBsettag()\fR \- "\fBsettag()\fR" in Imager::ImageTypes
.PP
\&\fBstring()\fR \- "\fBstring()\fR" in Imager::Draw \- draw text on an image
.PP
\&\fBtags()\fR \-  "\fBtags()\fR" in Imager::ImageTypes \- fetch image tags
.PP
\&\fBto_paletted()\fR \-  "\fBto_paletted()\fR" in Imager::ImageTypes
.PP
\&\fBto_rgb16()\fR \- "\fBto_rgb16()\fR" in Imager::ImageTypes
.PP
\&\fBto_rgb8()\fR \- "\fBto_rgb8()\fR" in Imager::ImageTypes
.PP
\&\fBto_rgb_double()\fR \- "\fBto_rgb_double()\fR" in Imager::ImageTypes \- convert to
double per sample image.
.PP
\&\fBtransform()\fR \- "\fBtransform()\fR" in Imager::Engines
.PP
\&\fBtransform2()\fR \- "\fBtransform2()\fR" in Imager::Engines
.PP
\&\fBtrim()\fR \- "\fBtrim()\fR" in Imager::Transformations \- return a cropped image
based on border transparency or border colors.
.PP
\&\fBtrim_rect()\fR \- "\fBtrim_rect()\fR" in Imager::Transformations \- return how much
\&\fBtrim()\fR would remove.
.PP
\&\fBtype()\fR \-  "\fBtype()\fR" in Imager::ImageTypes \- type of image (direct vs paletted)
.PP
\&\fBunload_plugin()\fR \- "\fBunload_plugin()\fR" in Imager::Filters
.PP
\&\fBvirtual()\fR \- "\fBvirtual()\fR" in Imager::ImageTypes \- whether the image has it's own
data
.PP
\&\fBwrite()\fR \- "\fBwrite()\fR" in Imager::Files \- write an image to a file
.PP
\&\fBwrite_multi()\fR \- "\fBwrite_multi()\fR" in Imager::Files \- write multiple image to an image
file.
.PP
\&\fBwrite_types()\fR \- "\fBread_types()\fR" in Imager::Files \- list image types Imager
can write.
.SH "CONCEPT INDEX"
.IX Header "CONCEPT INDEX"
animated GIF \- "Writing an animated GIF" in Imager::Files
.PP
aspect ratio \- \f(CW\*(C`i_xres\*(C'\fR, \f(CW\*(C`i_yres\*(C'\fR, \f(CW\*(C`i_aspect_only\*(C'\fR in
"Common Tags" in Imager::ImageTypes.
.PP
blend \- alpha blending one image onto another
"\fBrubthrough()\fR" in Imager::Transformations
.PP
blur \- "\f(CW\*(C`gaussian\*(C'\fR" in Imager::Filters, "\f(CW\*(C`conv\*(C'\fR" in Imager::Filters
.PP
boxes, drawing \- "\fBbox()\fR" in Imager::Draw
.PP
changes between image \- "Image Difference" in Imager::Filters
.PP
channels, combine into one image \- "\fBcombine()\fR" in Imager::Transformations
.PP
color \- Imager::Color
.PP
color names \- Imager::Color, Imager::Color::Table
.PP
combine modes \- "Combine Types" in Imager::Draw
.PP
compare images \- "Image Difference" in Imager::Filters
.PP
contrast \- "\f(CW\*(C`contrast\*(C'\fR" in Imager::Filters, "\f(CW\*(C`autolevels\*(C'\fR" in Imager::Filters
.PP
convolution \- "\f(CW\*(C`conv\*(C'\fR" in Imager::Filters
.PP
cropping \- "\fBcrop()\fR" in Imager::Transformations, "\fBtrim()\fR" in Imager::Transformations
.PP
CUR files \- "ICO (Microsoft Windows Icon) and CUR (Microsoft Windows Cursor)" in Imager::Files
.PP
\&\f(CW\*(C`diff\*(C'\fR images \- "Image Difference" in Imager::Filters
.PP
dpi \- \f(CW\*(C`i_xres\*(C'\fR, \f(CW\*(C`i_yres\*(C'\fR in "Common Tags" in Imager::ImageTypes,
"Image spatial resolution" in Imager::Cookbook
.PP
drawing boxes \- "\fBbox()\fR" in Imager::Draw
.PP
drawing lines \- "\fBline()\fR" in Imager::Draw
.PP
drawing text \- "\fBstring()\fR" in Imager::Draw, "\fBalign_string()\fR" in Imager::Draw
.PP
error message \- "ERROR HANDLING"
.PP
files, font \- Imager::Font
.PP
files, image \- Imager::Files
.PP
filling, types of fill \- Imager::Fill
.PP
filling, boxes \- "\fBbox()\fR" in Imager::Draw
.PP
filling, flood fill \- "\fBflood_fill()\fR" in Imager::Draw
.PP
flood fill \- "\fBflood_fill()\fR" in Imager::Draw
.PP
fonts \- Imager::Font
.PP
fonts, drawing with \- "\fBstring()\fR" in Imager::Draw,
"\fBalign_string()\fR" in Imager::Draw, Imager::Font::Wrap
.PP
fonts, metrics \- "\fBbounding_box()\fR" in Imager::Font, Imager::Font::BBox
.PP
fonts, multiple master \- "MULTIPLE MASTER FONTS" in Imager::Font
.PP
fountain fill \- "Fountain fills" in Imager::Fill,
"\f(CW\*(C`fountain\*(C'\fR" in Imager::Filters, Imager::Fountain,
"\f(CW\*(C`gradgen\*(C'\fR" in Imager::Filters
.PP
GIF files \- "GIF" in Imager::Files
.PP
GIF files, animated \- "Writing an animated GIF" in Imager::Files
.PP
gradient fill \- "Fountain fills" in Imager::Fill,
"\f(CW\*(C`fountain\*(C'\fR" in Imager::Filters, Imager::Fountain,
"\f(CW\*(C`gradgen\*(C'\fR" in Imager::Filters
.PP
gray scale, convert image to \- "\fBconvert()\fR" in Imager::Transformations
.PP
gaussian blur \- "\f(CW\*(C`gaussian\*(C'\fR" in Imager::Filters, "\f(CW\*(C`gaussian2\*(C'\fR" in Imager::Filters
.PP
hatch fills \- "Hatched fills" in Imager::Fill
.PP
ICO files \- "ICO (Microsoft Windows Icon) and CUR (Microsoft Windows Cursor)" in Imager::Files
.PP
invert image \- "\f(CW\*(C`hardinvert\*(C'\fR" in Imager::Filters,
"\f(CW\*(C`hardinvertall\*(C'\fR" in Imager::Filters
.PP
JPEG \- "JPEG" in Imager::Files
.PP
limiting image sizes \- "Limiting the sizes of images you read" in Imager::Files
.PP
lines, drawing \- "\fBline()\fR" in Imager::Draw
.PP
matrix \- Imager::Matrix2d, 
"Matrix Transformations" in Imager::Engines,
"\fBtransform()\fR" in Imager::Font
.PP
metadata, image \- "Tags" in Imager::ImageTypes, Image::ExifTool
.PP
mosaic \- "\f(CW\*(C`mosaic\*(C'\fR" in Imager::Filters
.PP
noise, filter \- "\f(CW\*(C`noise\*(C'\fR" in Imager::Filters
.PP
noise, rendered \- "\f(CW\*(C`turbnoise\*(C'\fR" in Imager::Filters,
"\f(CW\*(C`radnoise\*(C'\fR" in Imager::Filters
.PP
paste \- "\fBpaste()\fR" in Imager::Transformations,
"\fBrubthrough()\fR" in Imager::Transformations
.PP
pseudo-color image \- "\fBto_paletted()\fR" in Imager::ImageTypes,
"\fBnew()\fR" in Imager::ImageTypes
.PP
posterize \- "\f(CW\*(C`postlevels\*(C'\fR" in Imager::Filters
.PP
PNG files \- Imager::Files, "PNG" in Imager::Files
.PP
PNM \- "PNM (Portable aNy Map)" in Imager::Files
.PP
rectangles, drawing \- "\fBbox()\fR" in Imager::Draw
.PP
resizing an image \- "\fBscale()\fR" in Imager::Transformations, 
"\fBcrop()\fR" in Imager::Transformations
.PP
RGB (SGI) files \- "SGI (RGB, BW)" in Imager::Files
.PP
saving an image \- Imager::Files
.PP
scaling \- "\fBscale()\fR" in Imager::Transformations
.PP
security \- Imager::Security
.PP
SGI files \- "SGI (RGB, BW)" in Imager::Files
.PP
sharpen \- "\f(CW\*(C`unsharpmask\*(C'\fR" in Imager::Filters, "\f(CW\*(C`conv\*(C'\fR" in Imager::Filters
.PP
size, image \- "\fBgetwidth()\fR" in Imager::ImageTypes,
"\fBgetheight()\fR" in Imager::ImageTypes
.PP
size, text \- "\fBbounding_box()\fR" in Imager::Font
.PP
tags, image metadata \- "Tags" in Imager::ImageTypes
.PP
text, drawing \- "\fBstring()\fR" in Imager::Draw, "\fBalign_string()\fR" in Imager::Draw,
Imager::Font::Wrap
.PP
text, wrapping text in an area \- Imager::Font::Wrap
.PP
text, measuring \- "\fBbounding_box()\fR" in Imager::Font, Imager::Font::BBox
.PP
threads \- Imager::Threads
.PP
tiles, color \- "\f(CW\*(C`mosaic\*(C'\fR" in Imager::Filters
.PP
transparent images \- Imager::ImageTypes,
"Transparent PNG" in Imager::Cookbook
.PP
unsharp mask \- "\f(CW\*(C`unsharpmask\*(C'\fR" in Imager::Filters
.PP
watermark \- "\f(CW\*(C`watermark\*(C'\fR" in Imager::Filters
.PP
writing an image to a file \- Imager::Files
.SH SUPPORT
.IX Header "SUPPORT"
The best place to get help with Imager is the mailing list.
.PP
To subscribe send a message with \f(CW\*(C`subscribe\*(C'\fR in the body to:
.PP
.Vb 1
\&   imager\-devel+request@molar.is
.Ve
.PP
or use the form at:
.Sp
.RS 4
<http://www.molar.is/en/lists/imager\-devel/>
.RE
.PP
where you can also find the mailing list archive.
.PP
You can report bugs either via github at:
.Sp
.RS 4
<https://github.com/tonycoz/imager/issues>
.RE
.PP
or at:
.Sp
.RS 4
<https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Imager>
.RE
.PP
or by sending an email to:
.Sp
.RS 4
bug\-Imager@rt.cpan.org
.RE
.PP
Please remember to include the versions of Imager, perl, supporting
libraries, and any relevant code.  If you have specific images that
cause the problems, please include those too.
.SH "CONTRIBUTING TO IMAGER"
.IX Header "CONTRIBUTING TO IMAGER"
.SS Feedback
.IX Subsection "Feedback"
I like feedback.
.PP
You can send email to the maintainer below.
.PP
If you send me a bug report via email, it will be copied to Request
Tracker.
.SS Patches
.IX Subsection "Patches"
I accept patches, preferably against the master branch in git.  Please
include an explanation of the reason for why the patch is needed or
useful.
.PP
Your patch should include regression tests where possible, otherwise
it will be delayed until I get a chance to write them.
.PP
To browse Imager's git repository:
.PP
.Vb 1
\&  https://github.com/tonycoz/imager.git
.Ve
.PP
To clone:
.PP
.Vb 1
\&  git clone git://github.com/tonycoz/imager.git
.Ve
.PP
Or you can create a fork as usual on github and submit a github pull
request.
.PP
Patches can either be submitted as a github pull request or by using
\&\f(CW\*(C`git format\-patch\*(C'\fR, for example, if you made your changes in a branch
from master you might do:
.PP
.Vb 1
\&  git format\-patch \-k \-\-stdout master >my\-patch.txt
.Ve
.PP
and then attach that to your bug report, either by adding it as an
attachment in your email client, or by using the Request Tracker
attachment mechanism.
.SH AUTHOR
.IX Header "AUTHOR"
Tony Cook <tonyc@cpan.org> is the current maintainer for Imager.
.PP
Arnar M. Hrafnkelsson is the original author of Imager.
.PP
Many others have contributed to Imager, please see the \f(CW\*(C`README\*(C'\fR for a
complete list.
.SH LICENSE
.IX Header "LICENSE"
Imager is licensed under the same terms as perl itself.
.PP
A test font, generated by the Debian packaged Fontforge,
\&\fIFT2/fontfiles/MMOne.pfb\fR, contains a Postscript operator definition
copyrighted by Adobe.  See \fIadobe.txt\fR in the source for license
information.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
perl(1), Imager::ImageTypes(3), Imager::Files(3),
Imager::Draw(3), Imager::Color(3), Imager::Fill(3),
Imager::Font(3), Imager::Transformations(3),
Imager::Engines(3), Imager::Filters(3), Imager::Expr(3),
Imager::Matrix2d(3), Imager::Fountain(3)
.PP
<http://imager.perl.org/>
.PP
Affix::Infix2Postfix(3), Parse::RecDescent(3)
.PP
Other perl imaging modules include:
.PP
GD(3), Image::Magick(3),
Graphics::Magick <http://www.graphicsmagick.org/perl.html>(3),
Prima::Image, IPA.
.PP
For manipulating image metadata see Image::ExifTool.
.PP
If you're trying to use Imager for array processing, you should
probably using PDL.