PowerShell Requires Chilkat v11.7.0+

QR Code with a Text Caption

See more QR Code Examples

Demonstrates printing a line of text under a QR code, such as the order number or the address the code holds, so that a person can read it too. render.text turns the caption on and gives its value, which is printable ASCII and is drawn in a built-in font that needs no font files. The caption can go above or below the symbol, be aligned left, center or right, and be scaled. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

$json = New-Object Chilkat.JsonObject
$json.UpdateString("payload.text","https://www.chilkatsoft.com/order/12345")
$json.UpdateInt("render.moduleSize",6)

#  The caption.  It need not be the same as the text in the QR code.
$json.UpdateBool("render.text.enabled",$true)
$json.UpdateString("render.text.value","ORDER 12345")
#  position is "below" (the default) or "above".  alignment is "center" (the default), "left" or "right".
$json.UpdateString("render.text.position","below")
#  Each dot of the caption's font is drawn this many pixels wide.
$json.UpdateInt("render.text.scale",3)

$json.UpdateString("output.path","qa_output/qr_caption.png")
$json.UpdateBool("output.overwrite",$true)
$json.UpdateString("output.return","none")

$fmt = New-Object Chilkat.Formats
$jsonOut = New-Object Chilkat.JsonObject
$success = $fmt.QrCode("generate",$json,$jsonOut)
if ($success -eq $false) {
    $($fmt.LastErrorText)
    exit
}

$("caption: " + $jsonOut.StringOf("measurements[0].text"))
$("caption scale: " + $jsonOut.IntOf("measurements[0].textScale"))
$("height added for the caption: " + $jsonOut.IntOf("measurements[0].textBandPx") + " pixels")
$("image: " + $jsonOut.IntOf("measurements[0].canvasWidth") + " x " + $jsonOut.IntOf("measurements[0].canvasHeight") + " pixels")

#  The image written to qa_output/qr_caption.png:

#  

#  Sample output:

#  caption: ORDER 12345
#  caption scale: 3
#  height added for the caption: 21 pixels
#  image: 222 x 243 pixels