'''[image create]''' ''type ?name? ?option value ...?'' '''[image delete]''' ''?name name ...?'' '''[image height]''' ''name'' '''[image inuse]''' ''name'' '''[image names]''' '''[image type]''' ''name'' '''[image types]''' '''[image width]''' ''name'' ---- http://www.purl.org/tcl/home/man/tcl8.4/TkCmd/image.htm Tk images fall in two categories: [bitmap] and [photo]. [[Insert information about Tk's image command, the practical uses, and the little things that can get you, here]] One warning- be very careful what names you use for the image command. In particular, it is not advised that user input be used. This is because when Tk's image command creates an image, any proc/command formerly using that name is replaced. This could be frustrating or even disasterous if a user provided a name such as [set] or [interp], etc. ---- The Tk image command provides support for a limited number of formats. TkImg (aka [Img]) is a widely-used extension that beefs up image's capabilities. Note that $image write ... can write [GIF] and [PPM], but $image data ... cannot. ---- [KBK] offers an example which relies on [base64] to embed GIFs in scripts: package require base64 $img write myimage.gif -format gif set f [open myimage.gif r] set data [read $f] close $f set script [list set img \ [list image create photo -data [base64::encode $data]]] Img turns this into a one-liner: % package require Img 1.2.4 % set i1 [image create photo -file \ [file join $::tk_library demos images earthris.gif]] image2 % set s1 [$i1 data -format gif]; string length $s1 15192 % rename $i1 {} % set i2 [image create photo -data $s1] image3 Img does much beyond this, including [[insert details here ... ]] and [[...]]. ---- I ([FW]) wrote this code in a couple minutes the other day to occupy myself, which generates a 500x500 image of randomly-colored pixels and displays it in a window. I think this summarizes Tcl's image generation capabilities well (and the images it makes are pretty mesmerising, too). Might as well put it up here: proc generate_data {} { set data [list] for {set x 0} {$x < 500} {incr x} { set row [list] for {set y 0} {$y < 500} {incr y} { lappend row [format "#%02x%02x%02x" [random_byte] [random_byte] [random_byte]] } lappend data $row } return $data } proc random_byte {} { return [expr {int(rand() * 256)}] } set image [image create photo] $image put [generate_data] label .l -image $image pack .l [RS]: Cool! In my copy I just added the line bind . {$image put [generate_data]} to let the CPU work more ;-) ---- See also: * [Buttons with image and text] * [Images With Transparency and Plain Images] * [Reading GIF image dimensions] * [Reading JPEG image dimensions] * [Reading PNG image dimensions] * [Tk image Dos and Don'ts] * [Image scaling] * [Serializing a bitmap] * [Serializing a photo] * [Generating a color image] * [Coloring a gray image] ---- [Category Command] - [Tk syntax help] - [Arts and Crafts of Tcl-Tk Programming] - [Category Graphics]