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# ----------------------------------------------------------------------------
# xpm2image.tcl
# Slightly modified xpm-to-image command
# $Id: xpm2image.tcl,v 1.5 2004/09/09 22:17:03 hobbs Exp $
# ------------------------------------------------------------------------------
#
# Copyright 1996 by Roger E. Critchlow Jr., San Francisco, California
# All rights reserved, fair use permitted, caveat emptor.
# rec@elf.org
#
# ----------------------------------------------------------------------------
proc xpm-to-image { file } {
set f [open $file]
set string [read $f]
close $f
#
# parse the strings in the xpm data
#
set xpm {}
foreach line [split $string "\n"] {
if {[regexp {^"([^\"]*)"} $line all meat]} {
if {[string first XPMEXT $meat] == 0} {
break
}
lappend xpm $meat
}
}
#
# extract the sizes in the xpm data
#
set sizes [lindex $xpm 0]
set nsizes [llength $sizes]
if { $nsizes == 4 || $nsizes == 6 || $nsizes == 7 } {
set data(width) [lindex $sizes 0]
set data(height) [lindex $sizes 1]
set data(ncolors) [lindex $sizes 2]
set data(chars_per_pixel) [lindex $sizes 3]
set data(x_hotspot) 0
set data(y_hotspot) 0
if {[llength $sizes] >= 6} {
set data(x_hotspot) [lindex $sizes 4]
set data(y_hotspot) [lindex $sizes 5]
}
} else {
error "size line {$sizes} in $file did not compute"
}
#
# extract the color definitions in the xpm data
#
foreach line [lrange $xpm 1 $data(ncolors)] {
set colors [split $line \t]
set cname [lindex $colors 0]
lappend data(cnames) $cname
if { [string length $cname] != $data(chars_per_pixel) } {
error "color definition {$line} in file $file has a bad size color name"
}
foreach record [lrange $colors 1 end] {
set key [lindex $record 0]
set color [string tolower [join [lrange $record 1 end] { }]]
set data(color-$key-$cname) $color
if { [string equal -nocase $color "none"] } {
set data(transparent) $cname
}
}
foreach key {c g g4 m} {
if {[info exists data(color-$key-$cname)]} {
set color $data(color-$key-$cname)
set data(color-$cname) $color
set data(cname-$color) $cname
lappend data(colors) $color
break
}
}
if { ![info exists data(color-$cname)] } {
error "color definition {$line} in $file failed to define a color"
}
}
#
# extract the image data in the xpm data
#
set image [image create photo -width $data(width) -height $data(height)]
set y 0
foreach line [lrange $xpm [expr {1+$data(ncolors)}] [expr {1+$data(ncolors)+$data(height)}]] {
set x 0
set pixels {}
while { [string length $line] > 0 } {
set pixel [string range $line 0 [expr {$data(chars_per_pixel)-1}]]
set c $data(color-$pixel)
if { [string equal $c none] } {
if { [string length $pixels] } {
$image put [list $pixels] -to [expr {$x-[llength $pixels]}] $y
set pixels {}
}
} else {
lappend pixels $c
}
set line [string range $line $data(chars_per_pixel) end]
incr x
}
if { [llength $pixels] } {
$image put [list $pixels] -to [expr {$x-[llength $pixels]}] $y
}
incr y
}
#
# return the image
#
return $image
}
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