SQL Server 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. SQL Server

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @iTmp1 int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'payload.text', 'https://www.chilkatsoft.com/order/12345'
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'render.moduleSize', 6

    --  The caption.  It need not be the same as the text in the QR code.
    EXEC sp_OAMethod @json, 'UpdateBool', @success OUT, 'render.text.enabled', 1
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'render.text.value', 'ORDER 12345'
    --  position is "below" (the default) or "above".  alignment is "center" (the default), "left" or "right".
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'render.text.position', 'below'
    --  Each dot of the caption's font is drawn this many pixels wide.
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'render.text.scale', 3

    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'output.path', 'qa_output/qr_caption.png'
    EXEC sp_OAMethod @json, 'UpdateBool', @success OUT, 'output.overwrite', 1
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'output.return', 'none'

    DECLARE @fmt int
    EXEC @hr = sp_OACreate 'Chilkat.Formats', @fmt OUT

    DECLARE @jsonOut int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonOut OUT

    EXEC sp_OAMethod @fmt, 'QrCode', @success OUT, 'generate', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @fmt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @fmt
        EXEC @hr = sp_OADestroy @jsonOut
        RETURN
      END


    EXEC sp_OAMethod @jsonOut, 'StringOf', @sTmp0 OUT, 'measurements[0].text'
    PRINT 'caption: ' + @sTmp0

    EXEC sp_OAMethod @jsonOut, 'IntOf', @iTmp0 OUT, 'measurements[0].textScale'
    PRINT 'caption scale: ' + @iTmp0

    EXEC sp_OAMethod @jsonOut, 'IntOf', @iTmp0 OUT, 'measurements[0].textBandPx'

    PRINT 'height added for the caption: ' + @iTmp0 + ' pixels'

    EXEC sp_OAMethod @jsonOut, 'IntOf', @iTmp0 OUT, 'measurements[0].canvasWidth'

    EXEC sp_OAMethod @jsonOut, 'IntOf', @iTmp1 OUT, 'measurements[0].canvasHeight'

    PRINT 'image: ' + @iTmp0 + ' x ' + @iTmp1 + ' 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

    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @fmt
    EXEC @hr = sp_OADestroy @jsonOut


END
GO