4D v16.3

PICTURE TO BLOB

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4D v16.3
PICTURE TO BLOB

PICTURE TO BLOB 


 

PICTURE TO BLOB ( picture ; pictureBlob ; codec ) 
Parameter Type   Description
picture  Picture in Picture field or variable
pictureBlob  BLOB in BLOB to receive the converted picture
codec  String in Picture Codec ID

The PICTURE TO BLOB command converts a picture stored in a 4D variable or field to another format and places the resulting picture in a BLOB.

A picture 4D field or variable is passed in the picture parameter. In the pictureBlob parameter is passed a BLOB variable or field which should contain the converted picture.

Pass in the codec parameter a string setting the conversion format.

A Codec can be an extension (for example, “.gif”) or a Mime type (for example “image/jpeg”). You can get a list of available Codecs via the PICTURE CODEC LIST command.

Once the command has been executed, the pictureBlob contains the picture in the specified format.

If the conversion was successful, the system variable OK is set to 1. If the conversion has failed (converter not available), OK is set to 0 and the generated BLOB is empty (0 byte).



See also 

_o_PICTURE TYPE LIST
BLOB TO PICTURE
PICTURE CODEC LIST
PICTURE TO GIF
WRITE PICTURE FILE

 
PROPERTIES 

Product: 4D
Theme: Pictures
Number: 692

The OK variable is changed by the command

 
HISTORY 

Modified: 4D v11 SQL

 
ARTICLE USAGE

4D Language Reference ( 4D v16)
4D Language Reference ( 4D v16.1)
4D Language Reference ( 4D v16.2)
4D Language Reference ( 4D v16.3)