Provided by: tklib_0.6-3_all 
NAME
ico - Reading and writing windows icons
SYNOPSIS
package require Tcl 8.4
package require ico ?1.0.5?
::ico::icons file ?option value...?
::ico::iconMembers file name ?option value...?
::ico::getIcon file name ?option value...?
::ico::getIconByName file name ?option value...?
::ico::getFileIcon file ?option value...?
::ico::writeIcon file name depth data ?option value...?
::ico::copyIcon file index file2 index2 ?option value...?
::ico::EXEtoICO file ?dir?
::ico::clearCache ?file?
::ico::transparentColor image color
::ico::Show file ?option value...?
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DESCRIPTION
This package provides functions for reading and writing Windows icons from ICO, EXE, DLL, ICL, and BMP
files. As used in this module an icon is a visual representation of an object. An icon consists of one
or more images usually with varying resolution and color depth. Each icon and image has a resource
identifier which may be a text string or a positive integer value. Most commands use this identifier to
specify which icon or image to operate on.
API
::ico::icons file ?option value...?
Returns a list of icons found in file where each element is the name or numeric ID. Recognizes the
following options:
-type fileFormat
::ico::iconMembers file name ?option value...?
Returns a list of images that make up the icon with ID name. Each element is itself a sublist in
the format {name width height bpp}. Recognizes the following options:
-type fileFormat
::ico::getIcon file name ?option value...?
Extracts the icon with ID name from file. The default -format is image which will return the name
of a Tk image containing the icon. The resolution and color depth are selected with the ?-res?,
?-bpp?, and ?-exact? options. If -exact is specified and there is no exact match, an error is
thrown. Optionally -image may be used to specify the name of the Tk image that is created. If
-format is colors then a list of color names in the #RRGGBB format is returned. Each list element
is a horizontal row. Each horizontal row contains a list of colors for all the pixels in that row
from left to right. If -format is name then the resource name of the image chosen is returned.
This is useful for calling writeIcon or getIconByName. Recognizes the following options.
-type fileFormat
-format value
-image value
-res value
-bpp value
-exact value
::ico::getIconByName file name ?option value...?
Extracts the image with ID name from file. This name should be the name of a specific image as
returned by ::ico::iconMembers, not an icon name returned from ::ico::icons. If there is no
matching resource ID in file an error is thrown. Recognizes the following options:
-type fileFormat
-format value
::ico::getFileIcon file ?option value...?
This command is only functional when running under Windows. It reads the Windows registry to
determine the display icon for file as it would appear in Explorer or similar. file does not need
to exist and may also be specified as a file extension with a leading dot. If file is a directory
or you specify the special name Folder then the icon representing a folder is returned. This
command takes the same arguments and usage as getIcon:
-format value
-image value
-res value
-bpp value
-exact value
::ico::writeIcon file name depth data ?option value...?
Writes an image to file. name is the resource identifier of the image in file to write. When
writing to an EXE, DLL, or ICL file you may only overwrite existing icons with an icon of the same
dimensions and color depth. No icons may be added to these file types.
When writing to BMP the name is ignored as this type can contain only one image. This means if the
file already existed it is completely overwritten.
When writing to an ICO or ICODATA file if the name specified does not exist then an image is
appended and will be named the next in sequence (the specified name is ignored). Images in ICO and
ICODATA files may be overwritten with differing dimensions or color depths. Note that you will
get strange results when displaying icons if you fail to change every image which makes up a given
icon.
integer depth (in)
This argument must have a value of 1, 4, 8, 24, or 32. If data has more colors than the
color depth allows an error will be generated.
options data (in)
This argument is either a list of colors in the format returned by ::ico::getIcon -format
colors or the name of a Tk image.
Recognizes the following options.
-type fileFormat
::ico::copyIcon file index file2 index2 ?option value...?
Copies the icon at index in file to index2 in file2.
-fromtype fileFormat
-totype fileFormat
::ico::EXEtoICO file ?dir?
Extracts all icons from the executable file to ICO files placed in dir. ?dir? defaults to the
directory file is located in. Icon files will be named in the form file-ID.ico where ID is the
icon resource identifier.
-type fileFormat
::ico::clearCache ?file?
The ::ico::getIconList command caches icon offsets inside EXE, DLL, ICL, and ICO files in order to
speed up extraction. This command clears that cache for the specific ?file? or all files.
::ico::transparentColor image color
If image is a single word it is assumed to be the name of a Tk image. All pixels matching color
in the image will be set transparent. Alternatively, image may be a color list in which case a
modified list is returned.
::ico::Show file ?option value...?
Application level command which displays a window showing all the icons in file and their name.
-type fileFormat
-parent pathName
EXAMPLE
button .explore -image [::ico::getIcon explorer.exe 0 -name explore -res 16 -bpp 8]
set i [lsearch -inline [::ico::iconMembers tclkit.exe 0] {* 32 32 8}]
set colorlist [::ico::getIconByName tclkit.exe [lindex $i 0] -format colors]
LIMITATIONS
Icons may not be added or removed from file types other than ICO. Icons in these files may only be
replaced with icons of the same dimensions and color depth.
Icons of 8bpp or lower must include black in the pallete, this means if your icon does not have black in
it, you will need to leave a color free so that it may be included by writeIcon.
There is currently no way to read alpha channel information from 32bpp icons.
Tk images do not have an alpha channel so the only way to write a true 32bpp icon is from a color list.
writing a 32bpp icon from a Tkimage is identical to writing a 24bpp icon.
KEYWORDS
dll, entry, exe, ico, icon