Imager::ImageTypes(3) User Contributed Perl DocumentationImager::ImageTypes(3)NAMEImager::ImageTypes - image models for Imager
SYNOPSIS
use Imager;
$img = Imager->new(); # Empty image (size is 0 by 0)
$img->open(file=>'lena.png',type=>'png'); # Read image from file
$img = Imager->new(xsize=>400, ysize=>300); # RGB data
$img = Imager->new(xsize=>400, ysize=>300, # Grayscale
channels=>1); #
$img = Imager->new(xsize=>400, ysize=>300, # RGB with alpha
channels=>4); #
$img = Imager->new(xsize=>200, ysize=>200,
type=>'paletted'); # paletted image
$img = Imager->new(xsize=>200, ysize=>200,
bits=>16); # 16 bits/channel rgb
$img = Imager->new(xsize=>200, ysize=>200,
bits=>'double'); # 'double' floating point
# per channel
$img->img_set(xsize=>500, ysize=>500, # reset the image object
channels=>4);
# Example getting information about an Imager object
print "Image information:\n";
print "Width: ", $img->getwidth(), "\n";
print "Height: ", $img->getheight(), "\n";
print "Channels: ", $img->getchannels(), "\n";
print "Bits/Channel: ", $img->bits(), "\n";
print "Virtual: ", $img->virtual() ? "Yes" : "No", "\n";
my $colorcount = $img->getcolorcount(maxcolors=>512);
print "Actual number of colors in image: ";
print defined($colorcount) ? $colorcount : ">512", "\n";
print "Type: ", $img->type(), "\n";
if ($img->type() eq 'direct') {
print "Modifiable Channels: ";
print join " ", map {
($img->getmask() & 1<<$_) ? $_ : ()
} 0..$img->getchannels();
print "\n";
} else {
# palette info
my $count = $img->colorcount;
@colors = $img->getcolors();
print "Palette size: $count\n";
my $mx = @colors > 4 ? 4 : 0+@colors;
print "First $mx entries:\n";
for (@colors[0..$mx-1]) {
my @res = $_->rgba();
print "(", join(", ", @res[0..$img->getchannels()-1]), ")\n";
}
}
my @tags = $img->tags();
if (@tags) {
print "Tags:\n";
for(@tags) {
print shift @$_, ": ", join " ", @$_, "\n";
}
} else {
print "No tags in image\n";
}
DESCRIPTION
Imager supports two basic models of image:
· direct color - all samples are stored for every pixel. eg. for an
8-bit/sample RGB image, 24 bits are stored for each pixel.
· paletted - an index into a table of colors is stored for each
pixel.
Direct color or paletted images can have 1 to 4 samples per color
stored. Imager treats these as follows:
· 1 sample per color - gray scale image.
· 2 samples per color - gray scale image with alpha channel, allowing
transparency.
· 3 samples per color - RGB image.
· 4 samples per color - RGB image with alpha channel, allowing
transparency.
Direct color images can have sample sizes of 8-bits per sample, 16-bits
per sample or a double precision floating point number per sample
(64-bits on many systems).
Paletted images are always 8-bits/sample.
To query an existing image about it's parameters see the "bits()",
"type()", "getwidth()", "getheight()", "getchannels()" and "virtual()"
methods.
The coordinate system in Imager has the origin in the upper left
corner, see Imager::Draw for details.
The alpha channel when one is present is considered unassociated - ie
the color data has not been scaled by the alpha channel. Note that not
all code follows this (recent) rule, but will over time.
Creating Imager Objects
new()
$img = Imager->new();
$img->read(file=>"alligator.ppm") or die $img->errstr;
Here "new()" creates an empty image with width and height of zero.
It's only useful for creating an Imager object to call the read()
method on later.
%opts = (xsize=>300, ysize=>200);
$img = Imager->new(%opts); # create direct mode RGBA image
$img = Imager->new(%opts, channels=>4); # create direct mode RGBA image
You can also read a file from new():
$img = Imager->new(file => "someimage.png");
The parameters for new are:
· "xsize", "ysize" - Defines the width and height in pixels of
the image. These must be positive.
If not supplied then only placeholder object is created, which
can be supplied to the "read()" or "img_set()" methods.
· "channels" - The number of channels for the image. Default 3.
Valid values are from 1 to 4.
· "bits" - The storage type for samples in the image. Default:
8. Valid values are:
· 8 - One byte per sample. 256 discrete values.
· 16 - 16-bits per sample, 65536 discrete values.
· "double" - one C double per sample.
Note: you can use any Imager function on any sample size image.
Paletted images always use 8 bits/sample.
· "type" - either 'direct' or 'paletted'. Default: 'direct'.
Direct images store color values for each pixel.
Paletted images keep a table of up to 256 colors called the
palette, each pixel is represented as an index into that table.
In most cases when working with Imager you will want to use the
"direct" image type.
If you draw on a "paletted" image with a color not in the
image's palette then Imager will transparently convert it to a
"direct" image.
· "maxcolors" - the maximum number of colors in a paletted image.
Default: 256. This must be in the range 1 through 256.
· "file", "fh", "fd", "callback", "readcb" - specify a file name,
filehandle, file descriptor or callback to read image data
from. See Imager::Files for details. The typical use is:
my $im = Imager->new(file => $filename);
· "filetype" - treated as the file format parameter, as for
"type" with the read() method, eg:
my $im = Imager->new(file => $filename, filetype => "gif");
In most cases Imager will detect the file's format itself.
In the simplest case just supply the width and height of the image:
# 8 bit/sample, RGB image
my $img = Imager->new(xsize => $width, ysize => $height);
or if you want an alpha channel:
# 8 bits/sample, RGBA image
my $img = Imager->new(xsize => $width, ysize => $height, channels=>4);
Note that it is possible for image creation to fail, for example if
channels is out of range, or if the image would take too much
memory.
To create paletted images, set the 'type' parameter to 'paletted':
$img = Imager->new(xsize=>200, ysize=>200, type=>'paletted');
which creates an image with a maximum of 256 colors, which you can
change by supplying the "maxcolors" parameter.
For improved color precision you can use the bits parameter to
specify 16 bit per channel:
$img = Imager->new(xsize=>200, ysize=>200,
channels=>3, bits=>16);
or for even more precision:
$img = Imager->new(xsize=>200, ysize=>200,
channels=>3, bits=>'double');
to get an image that uses a double for each channel.
Note that as of this writing all functions should work on images
with more than 8-bits/channel, but many will only work at only
8-bit/channel precision.
If you want an empty Imager object to call the read() method on,
just call new() with no parameters:
my $img = Imager->new;
$img->read(file=>$filename)
or die $img->errstr;
Though it's much easier now to just call new() with a "file"
parameter:
my $img = Imager->new(file => $filename)
or die Imager->errstr;
img_set()
img_set destroys the image data in the object and creates a new one
with the given dimensions and channels. For a way to convert image
data between formats see the "convert()" method.
$img->img_set(xsize=>500, ysize=>500, channels=>4);
This takes exactly the same parameters as the new() method.
Image Attribute functions
These return basic attributes of an image object.
getwidth()
print "Image width: ", $img->getwidth(), "\n";
The "getwidth()" method returns the width of the image. This value
comes either from "new()" with "xsize", "ysize" parameters or from
reading data from a file with "read()". If called on an image that
has no valid data in it like "Imager->new()" returns, the return
value of "getwidth()" is undef.
getheight()
print "Image height: ", $img->getheight(), "\n";
Same details apply as for "getwidth()".
getchannels()
print "Image has ",$img->getchannels(), " channels\n";
To get the number of channels in an image "getchannels()" is used.
bits()
The bits() method retrieves the number of bits used to represent
each channel in a pixel, 8 for a normal image, 16 for 16-bit image
and 'double' for a double/channel image.
if ($img->bits eq 8) {
# fast but limited to 8-bits/sample
}
else {
# slower but more precise
}
type()
The type() method returns either 'direct' for direct color images
or 'paletted' for paletted images.
if ($img->type eq 'paletted') {
# print the palette
for my $color ($img->getcolors) {
print join(",", $color->rgba), "\n";
}
}
virtual()
The virtual() method returns non-zero if the image contains no
actual pixels, for example masked images.
This may also be used for non-native Imager images in the future,
for example, for an Imager object that draws on an SDL surface.
is_bilevel()
Tests if the image will be written as a monochrome or bi-level
image for formats that support that image organization.
In scalar context, returns true if the image is bi-level.
In list context returns a list:
($is_bilevel, $zero_is_white) = $img->is_bilevel;
An image is considered bi-level, if all of the following are true:
· the image is a paletted image
· the image has 1 or 3 channels
· the image has only 2 colors in the palette
· those 2 colors are black and white, in either order.
If a real bi-level organization image is ever added to Imager, this
function will return true for that too.
Direct Type Images
Direct images store the color value directly for each pixel in the
image.
getmask()
@rgbanames = qw( red green blue alpha );
my $mask = $img->getmask();
print "Modifiable channels:\n";
for (0..$img->getchannels()-1) {
print $rgbanames[$_],"\n" if $mask & 1<<$_;
}
"getmask()" is used to fetch the current channel mask. The mask
determines what channels are currently modifiable in the image.
The channel mask is an integer value, if the "i-th" least
significant bit is set the "i-th" channel is modifiable. eg. a
channel mask of 0x5 means only channels 0 and 2 are writable.
setmask()
$mask = $img->getmask();
$img->setmask(mask=>8); # modify alpha only
...
$img->setmask(mask=>$mask); # restore previous mask
"setmask()" is used to set the channel mask of the image. See
"getmask()" for details.
Palette Type Images
Paletted images keep an array of up to 256 colors, and each pixel is
stored as an index into that array.
In general you can work with paletted images in the same way as RGB
images, except that if you attempt to draw to a paletted image with a
color that is not in the image's palette, the image will be converted
to an RGB image. This means that drawing on a paletted image with
anti-aliasing enabled will almost certainly convert the image to RGB.
Palette management takes place through "addcolors()", "setcolors()",
"getcolors()" and "findcolor()":
addcolors()
You can add colors to a paletted image with the addcolors() method:
my @colors = ( Imager::Color->new(255, 0, 0),
Imager::Color->new(0, 255, 0) );
my $index = $img->addcolors(colors=>\@colors);
The return value is the index of the first color added, or undef if
adding the colors would overflow the palette.
The only parameter is "colors" which must be a reference to an
array of Imager::Color objects.
setcolors()
$img->setcolors(start=>$start, colors=>\@colors);
Once you have colors in the palette you can overwrite them with the
"setcolors()" method: "setcolors()" returns true on success.
Parameters:
· start - the first index to be set. Default: 0
· colors - reference to an array of Imager::Color objects.
getcolors()
To retrieve existing colors from the palette use the getcolors()
method:
# get the whole palette
my @colors = $img->getcolors();
# get a single color
my $color = $img->getcolors(start=>$index);
# get a range of colors
my @colors = $img->getcolors(start=>$index, count=>$count);
findcolor()
To quickly find a color in the palette use findcolor():
my $index = $img->findcolor(color=>$color);
which returns undef on failure, or the index of the color.
Parameter:
· color - an Imager::Color object.
colorcount()
Returns the number of colors in the image's palette:
my $count = $img->colorcount;
maxcolors()
Returns the maximum size of the image's palette.
my $maxcount = $img->maxcolors;
Color Distribution
getcolorcount()
Calculates the number of colors in an image.
The amount of memory used by this is proportional to the number of
colors present in the image, so to avoid using too much memory you
can supply a maxcolors() parameter to limit the memory used.
Note: getcolorcount() treats the image as an 8-bit per sample
image.
· "maxcolors" - the maximum number of colors to return. Default:
unlimited.
if (defined($img->getcolorcount(maxcolors=>512)) {
print "Less than 512 colors in image\n";
}
getcolorusagehash()
Calculates a histogram of colors used by the image.
· "maxcolors" - the maximum number of colors to return. Default:
unlimited.
Returns a reference to a hash where the keys are the raw color as
bytes, and the values are the counts for that color.
The alpha channel of the image is ignored. If the image is gray
scale then the hash keys will each be a single character.
my $colors = $img->getcolorusagehash;
my $blue_count = $colors->{pack("CCC", 0, 0, 255)} || 0;
print "#0000FF used $blue_count times\n";
getcolorusage()
Calculates color usage counts and returns just the counts.
· "maxcolors" - the maximum number of colors to return. Default:
unlimited.
Returns a list of the color frequencies in ascending order.
my @counts = $img->getcolorusage;
print "The most common color is used $counts[0] times\n";
Conversion Between Image Types
Warning: if you draw on a paletted image with colors that aren't in the
palette, the image will be internally converted to a normal image.
to_paletted()
You can create a new paletted image from an existing image using
the to_paletted() method:
$palimg = $img->to_paletted(\%opts)
where %opts contains the options specified under "Quantization
options".
# convert to a paletted image using the web palette
# use the closest color to each pixel
my $webimg = $img->to_paletted({ make_colors => 'webmap' });
# convert to a paletted image using a fairly optimal palette
# use an error diffusion dither to try to reduce the average error
my $optimag = $img->to_paletted({ make_colors => 'mediancut',
translate => 'errdiff' });
to_rgb8()
You can convert a paletted image (or any image) to an 8-bit/channel
RGB image with:
$rgbimg = $img->to_rgb8;
No parameters.
to_rgb16()
Convert a paletted image (or any image) to a 16-bit/channel RGB
image.
$rgbimg = $img->to_rgb16;
No parameters.
to_rgb_double()
Convert a paletted image (or any image) to an double/channel direct
color image.
$rgbimg = $img->to_rgb_double;
No parameters.
masked()
Creates a masked image. A masked image lets you create an image
proxy object that protects parts of the underlying target image.
In the discussion below there are 3 image objects involved:
· the masked image - the return value of the masked() method.
Any writes to this image are written to the target image,
assuming the mask image allows it.
· the mask image - the image that protects writes to the target
image. Supplied as the "mask" parameter to the masked()
method.
· the target image - the image you called the masked() method on.
Any writes to the masked image end up on this image.
Parameters:
· mask - the mask image. If not supplied then all pixels in the
target image are writable. On each write to the masked image,
only pixels that have non-zero in channel 0 of the mask image
will be written to the original image. Default: none, if not
supplied then no masking is done, but the other parameters are
still honored.
· left, top - the offset of writes to the target image. eg. if
you attempt to set pixel (x,y) in the masked image, then pixel
(x+left, y+top) will be written to in the original image.
· bottom, right - the bottom right of the area in the target
available from the masked image.
Masked images let you control which pixels are modified in an
underlying image. Where the first channel is completely black in
the mask image, writes to the underlying image are ignored.
For example, given a base image called $img:
my $mask = Imager->new(xsize=>$img->getwidth, ysize=>$img->getheight,
channels=>1);
# ... draw something on the mask
my $maskedimg = $img->masked(mask=>$mask);
# now draw on $maskedimg and it will only draw on areas of $img
# where $mask is non-zero in channel 0.
You can specify the region of the underlying image that is masked
using the left, top, right and bottom options.
If you just want a subset of the image, without masking, just
specify the region without specifying a mask. For example:
# just work with a 100x100 region of $img
my $maskedimg = $img->masked(left => 100, top=>100,
right=>200, bottom=>200);
make_palette()
This doesn't perform an image conversion, but it can be used to
construct a common palette for use in several images:
my @colors = Imager->make_palette(\%opts, @images);
You must supply at least one image, even if the "make_colors"
parameter produces a fixed palette.
On failure returns no colors and you can check "Imager->errstr".
Tags
Image tags contain meta-data about the image, ie. information not
stored as pixels of the image.
At the perl level each tag has a name or code and a value, which is an
integer or an arbitrary string. An image can contain more than one tag
with the same name or code, but having more than one tag with the same
name is discouraged.
You can retrieve tags from an image using the tags() method, you can
get all of the tags in an image, as a list of array references, with
the code or name of the tag followed by the value of the tag.
Imager's support for fairly limited, for access to pretty much all
image metadata you may want to try Image::ExifTool.
tags()
Retrieve tags from the image.
With no parameters, retrieves a list array references, each
containing a name and value: all tags in the image:
# get a list of ( [ name1 => value1 ], [ name2 => value2 ] ... )
my @alltags = $img->tags;
print $_->[0], ":", $_->[1], "\n" for @all_tags;
# or put it in a hash, but this will lose duplicates
my %alltags = map @$_, $img->tags;
in scalar context this returns the number of tags:
my $num_tags = $img->tags;
or you can get all tags values for the given name:
my @namedtags = $img->tags(name => $name);
in scalar context this returns the first tag of that name:
my $firstnamed = $img->tags(name => $name);
or a given code:
my @tags = $img->tags(code=>$code);
addtag()
You can add tags using the addtag() method, either by name:
my $index = $img->addtag(name=>$name, value=>$value);
or by code:
my $index = $img->addtag(code=>$code, value=>$value);
deltag()
You can remove tags with the deltag() method, either by index:
$img->deltag(index=>$index);
or by name:
$img->deltag(name=>$name);
or by code:
$img->deltag(code=>$code);
In each case deltag() returns the number of tags deleted.
settag()settag() replaces any existing tags with a new tag. This is
equivalent to calling deltag() then addtag().
Common Tags
Many tags are only meaningful for one format. GIF looping information
is pretty useless for JPEG for example. Thus, many tags are set by
only a single reader or used by a single writer. For a complete list
of format specific tags see Imager::Files.
Since tags are a relatively new addition their use is not wide spread
but eventually we hope to have all the readers for various formats set
some standard information.
· "i_xres", "i_yres" - The spatial resolution of the image in pixels
per inch. If the image format uses a different scale, eg. pixels
per meter, then this value is converted. A floating point number
stored as a string.
# our image was generated as a 300 dpi image
$img->settag(name => 'i_xres', value => 300);
$img->settag(name => 'i_yres', value => 300);
# 100 pixel/cm for a TIFF image
$img->settag(name => 'tiff_resolutionunit', value => 3); # RESUNIT_CENTIMETER
# convert to pixels per inch, Imager will convert it back
$img->settag(name => 'i_xres', value => 100 * 2.54);
$img->settag(name => 'i_yres', value => 100 * 2.54);
· "i_aspect_only" - If this is non-zero then the values in i_xres and
i_yres are treated as a ratio only. If the image format does not
support aspect ratios then this is scaled so the smaller value is
72 DPI.
· "i_incomplete" - If this tag is present then the whole image could
not be read. This isn't implemented for all images yet, and may
not be.
· "i_lines_read" - If "i_incomplete" is set then this tag may be set
to the number of scan lines successfully read from the file. This
can be used to decide whether an image is worth processing.
· i_format - The file format this file was read from.
· i_background - used when writing an image with an alpha channel to
a file format that doesn't support alpha channels. The "write"
method will convert a normal color specification like "#FF0000"
into a color object for you, but if you set this as a tag you will
need to format it like "color("red","green","blue")", eg
color(255,0,0).
· "i_comment" - used when reading or writing several image formats.
If the format has only one text field it will be read into the
"i_comment" tag or written to the file.
Quantization options
These options can be specified when calling "to_paletted()" in
Imager::ImageTypes, write_multi() for GIF files, when writing a single
image with the "gifquant" option set to "gen", or for direct calls to
i_writegif_gen() and i_writegif_callback().
· "colors" - An arrayref of colors that are fixed. Note that some
color generators will ignore this. If this is supplied it will be
filled with the color table generated for the image.
· "transp" - The type of transparency processing to perform for
images with an alpha channel where the output format does not have
a proper alpha channel (eg. GIF). This can be any of:
· "none" - No transparency processing is done. (default)
· "threshold" - pixels more transparent than "tr_threshold" are
rendered as transparent.
· "errdiff" - An error diffusion dither is done on the alpha
channel. Note that this is independent of the translation
performed on the color channels, so some combinations may cause
undesired artifacts.
· "ordered" - the ordered dither specified by tr_orddith is
performed on the alpha channel.
This will only be used if the image has an alpha channel, and if
there is space in the palette for a transparency color.
· "tr_threshold" - the highest alpha value at which a pixel will be
made transparent when "transp" is 'threshold'. (0-255, default 127)
· "tr_errdiff" - The type of error diffusion to perform on the alpha
channel when "transp" is "errdiff". This can be any defined error
diffusion type except for custom (see "errdiff" below).
· "tr_orddith" - The type of ordered dither to perform on the alpha
channel when "transp" is 'ordered'. Possible values are:
· "random" - A semi-random map is used. The map is the same each
time.
· "dot8" - 8x8 dot dither.
· "dot4" - 4x4 dot dither
· "hline" - horizontal line dither.
· "vline" - vertical line dither.
· "/line", "slashline" - diagonal line dither
· "\line", "backline" - diagonal line dither
· "tiny" - dot matrix dither (currently the default). This is
probably the best for displays (like web pages).
· "custom" - A custom dither matrix is used - see "tr_map".
· "tr_map" - When tr_orddith is custom this defines an 8 x 8 matrix
of integers representing the transparency threshold for pixels
corresponding to each position. This should be a 64 element array
where the first 8 entries correspond to the first row of the
matrix. Values should be between 0 and 255.
· "make_colors" - Defines how the quantization engine will build the
palette(s). Currently this is ignored if "translate" is "giflib",
but that may change. Possible values are:
· "none" - only colors supplied in 'colors' are used.
· "webmap" - the web color map is used (need URL here.)
· "addi" - The original code for generating the color map (Addi's
code) is used.
· "mediancut" - Uses a median-cut algorithm, faster than "addi",
but not as good a result.
· "mono", "monochrome" - a fixed black and white palette,
suitable for producing bi-level images (eg. facsimile)
· "gray", "gray4", "gray16" - make fixed gray palette with 256, 4
or 16 entries respectively.
Other methods may be added in the future.
· "colors" - an arrayref containing Imager::Color objects, which
represents the starting set of colors to use in translating the
images. "webmap" will ignore this. On return the final colors
used are copied back into this array (which is expanded if
necessary.)
· "max_colors" - the maximum number of colors to use in the image.
· "translate" - The method used to translate the RGB values in the
source image into the colors selected by make_colors. Note that
make_colors is ignored when "translate" is "giflib".
Possible values are:
· "giflib" - this is a historical equivalent for "closest" that
also forces "make_colors" to "mediancut".
· "closest" - the closest color available is used.
· "perturb" - the pixel color is modified by "perturb", and the
closest color is chosen.
· "errdiff" - an error diffusion dither is performed. If the
supplied (or generated) palette contains only grays the source
colors are converted to gray before error diffusion is
performed.
It's possible other "translate" values will be added.
· "errdiff" - The type of error diffusion dither to perform. These
values (except for custom) can also be used in tr_errdif.
· "floyd" - Floyd-Steinberg dither
· "jarvis" - Jarvis, Judice and Ninke dither
· "stucki" - Stucki dither
· "custom" - custom. If you use this you must also set
"errdiff_width", "errdiff_height" and "errdiff_map".
· "errdiff_width", "errdiff_height", "errdiff_orig", "errdiff_map" -
When "translate" is "errdiff" and "errdiff" is "custom" these
define a custom error diffusion map. "errdiff_width" and
"errdiff_height" define the size of the map in the arrayref in
"errdiff_map". "errdiff_orig" is an integer which indicates the
current pixel position in the top row of the map.
· "perturb" - When translate is "perturb" this is the magnitude of
the random bias applied to each channel of the pixel before it is
looked up in the color table.
INITIALIZATION
This documents the Imager initialization function, which you will
almost never need to call.
init()
This is a function, not a method.
This function is a mess, it can take the following named
parameters:
· "log" - name of a log file to log Imager's actions to. Not all
actions are logged, but the debugging memory allocator does log
allocations here. Ignored if Imager has been built without
logging support. Preferably use the open_log() method instead.
· "loglevel" - the maximum level of message to log. Default: 1.
· "warn_obsolete" - if this is non-zero then Imager will warn
when you attempt to use obsoleted parameters or functionality.
This currently only includes the old GIF output options instead
of tags.
· "t1log" - if non-zero then T1lib will be configured to produce
a log file. This will fail if there are any existing T1lib
font objects.
Example:
Imager::init(log => 'trace.log', loglevel => 9);
LOGGING METHODS
Imager can open an internal log to send debugging information to. This
log is extensively used in Imager's tests, but you're unlikely to use
it otherwise.
If Imager has been built with logging disabled, the methods fail
quietly.
open_log()
Open the Imager debugging log file.
· "log" - the file name to log to. If this is undef logging
information is sent to the standard error stream.
· "loglevel" the level of logging to produce. Default: 1.
Returns a true value if the log file was opened successfully.
# send debug output to test.log
Imager->open_log(log => "test.log");
# send debug output to stderr
Imager->open_log();
close_log()
Close the Imager debugging log file and disable debug logging.
No parameters.
Imager->close_log();
log()
Imager->log($message)
Imager->log($message, $level)
This method does not use named parameters.
The default for $level is 1.
Send a message to the debug log.
Imager->log("My code got here!");
is_logging()
Returns a true value if logging is enabled.
REVISION
$Revision$
AUTHORS
Tony Cook, Arnar M. Hrafnkelsson
SEE ALSOImager(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)perl v5.14.3 2012-10-08 Imager::ImageTypes(3)
