--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zint/backend_tcl/demo/demo.tcl	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,71 @@
+package require Tk
+package require zint
+wm title . "ZINT Demo"
+wm minsize . 480 320
+if {[info command sdltk] eq "sdltk"} {
+    wm attributes . -fullscreen 1
+    set padx 30
+    set pady 20
+} else {
+    wm geometry . 480x320
+    set padx 5
+    set pady 5
+}
+image create photo ::zintimg
+pack [::ttk::combobox .c -values [lsort [zint symbologies]] -state readonly] \
+    -side top -fill x -padx $padx -pady $pady
+.c set Datamatrix
+pack [::ttk::entry .e] -side top -fill x -padx $padx -pady $pady
+.e insert end 12345
+bind .e <Return> Generate
+pack [::ttk::entry .o] -side top -fill x -padx $padx -pady $pady
+.o insert end "-bold 1"
+bind .o <Return> Generate
+pack [::ttk::button .b -text Generate -command Generate] -fill x -side top \
+    -padx $padx -pady $pady
+proc Generate {} {
+    ::zintimg blank
+    ::zintimg configure -width 1 -height 1
+    ::zintimg blank
+    ::zintimg configure -width 0 -height 0
+    if {[catch {zint encode [.e get] ::zintimg -barcode [.c get] {*}[.o get]} e]} {
+        tk_messageBox -message $e -title "Zint error"
+    } else {
+        set w [image width ::zintimg]
+        set h [image height ::zintimg]
+        set lw [winfo width .l]
+        set lh [winfo height .l]
+        set sx [expr {int(1.0 * $lw / $w)}]
+        set sy [expr {int(1.0 * $lh / $h)}]
+        if {$sy < $sx} {
+            set sx $sy
+        }
+        if {$sx <= 0} {
+            set sx [expr {1.1 * $lw / $w}]
+            set sy [expr {1.1 * $lh / $h}]
+            if {$sy < $sx} {
+                set sx $sy
+            }
+        }
+        ::zintimg blank
+        ::zintimg configure -width 1 -height 1
+        ::zintimg blank
+        ::zintimg configure -width 0 -height 0
+        catch {
+            zint encode [.e get] ::zintimg -barcode [.c get] -scale $sx {*}[.o get]
+        }
+    }
+}
+pack [label .l -image ::zintimg -bg white] -side top -fill both -expand 1 \
+    -padx $padx -pady $pady
+bind .e <Configure> {
+    after cancel Generate
+    after idle Generate
+}
+bind .c <<ComboboxSelected>> {
+    after cancel Generate
+    after idle Generate
+}
+bind all <Break> exit
+bind all <Control-q> exit
+bind all <Alt-q> exit