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qrCreate

Type​

command

Summary​

Create a QR code

Syntax​

qrCreate <pImg>,<pData>,<pECC>,<pSize>,<pMask>,<pMinVersion>,<pMaxVersion>

Description​

Set the text of an image to a QR code or get the PMG data of the QR code image.

Parameters​

NameTypeDescription

pImg

The name of an image object on the card, a filename or the special code "!" which will return the image data in the result.

pData

The data to be encoded.

pECC

The error correction level

  • "L" : 7% error correction
  • "M" : 15% error correction
  • "Q" : 25% error correction
  • "H" : 30% error correction

pSize

Module size you can make the code larger/smaller. You can also just rescale the image after the code has been created.

pMask

An integer value between 0 and 7. When encoding a QR code, there are eight mask patterns that you can use to change the outputted matrix. Each mask pattern changes the bits according to their coordinates in the QR matrix. The purpose of a mask pattern is to make the QR code easier for a QR scanner to read.

pMinVersion

An integer value between 1 and 40. It must be lower or equal to pMaxVersion. If pMinVersion is not specified then the default value of 1 is used.

pMaxVersion

An integer value between 1 and 40. It must be higher or equal to pMinVersion. If pMaxVersion is not specified then the default value of 40 is used.

Examples​

qrCreate "MyImage", "QR data", "M", 3
--creating QR Code with ECC level M, Size 3, Mask 7 and version 14
qrCreate "MyImage", "QR data", "M", 3, 7, 14, 14
-- example how to use qrCreate with LiveCode server
qrCreate "!", tData, tECC, tSize
put the result into tData
if tData begins with "Error" then
   put tData
else
   # line 1 of the result contains some info
   # the remaining lines contain the png image data
   put line 1 of tData into tInfo
   delete line 1 of tData

   put "&lt;b&gt;Qr code info&lt;/b&gt;&lt;br/&gt;" & LF
   put "Version: " & item 1 of tInfo & "&lt;br/&gt;" & LF
   put "ECC: " & item 2 of tInfo & "&lt;br/&gt;" & LF
   put "Mode: " & item 3 of tInfo & "&lt;br/&gt;" & LF
   put "Mask: " & item 4 of tInfo & "&lt;br/&gt;" & LF

   # show the image
   put base64Encode(tData) into tData
   replace LF with empty in tData
   put "&lt;img src='data:image/png;base64," & tData & "'/&gt;&lt;br/&gt;" & LF
end if