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4D v14.3

QT COMPRESS PICTURE


QT COMPRESS PICTURE ( picture ; method ; quality )

Parameter	Type	Description
picture	Picture	Picture to be compressed
		Compressed picture
method	String	4-character string compression method
quality	Longint	Compression quality (1..1000)

Compatibility note

This command calls for obsolete mechanisms and is only kept for compatibility reasons. It has been favorably replaced by the CONVERT PICTURE command.

Description

The QT COMPRESS PICTURE command compresses the picture contained in the field or variable picture.

The parameter method is a 4-character string indicating the compressor type. You should pass one of the constants of the Picture Compression theme in this parameter.

The parameter quality is an integer between 1 and 1000 indicating the quality of the compressed picture. In general, reducing the quality will allow for greater compression of the picture.

Warning: The compression ratio possible for a given quality depends on the size and nature of the picture you are compressing. Compressing small pictures may not produce any decrease in size.