EAN-Code - Core4 Lua Commands

SYNOPSIS

width, height = gcx:barcode("EAN", x, y, module_width, barcode_height, text)
width, height = gcx:barcodesize("EAN", x, y, module_width, barcode_height, text)
width, height = gfx.barcodesize("EAN", x, y, module_width, barcode_height, text)

DESCRIPTION

Draws a EAN code at the coordinates x, y.

The EAN is a numeric barcode and is supported in two forms: EAN-13 or EAN-8. The barcode length is automatically detected via the length of the text parameter.

If the text is 7 or 8 digits long, a EAN-8 code is generated. In case of 7 digits, the check-digit is added automatically.

If the text is 12 or 13 digits long, a EAN-13 code is generated. In case of 12 digits, the check-digit is added automatically.

Note that if the check-digit is passed by the application, the barcode will be printed with that check-digit, even if it is wrong.

This function only generates the barcode. There are no human readable digits printed below the code.

The parameter module_width specifies the width of one Module unit. If the barcode is to be printed, the parameter should be at least 2, better 3.

The parameter barcode_height specifies the height of the full barcode in pixels.

RETURN VALUE

On success, returns the width and height of the resulting barcode in pixels. If the barcode cannot be drawn due to invalid parameters, returns nil, nil.