4D v13.4
QT COMPRESS PICTURE FILE
- 4D Language Reference
-
- Pictures
-
- Pictures
- BLOB TO PICTURE
- COMBINE PICTURES
- CONVERT PICTURE
- CREATE THUMBNAIL
- Equal picturesNew
- Get picture file nameNew
- GET PICTURE FROM LIBRARY
- GET PICTURE KEYWORDSNew
- GET PICTURE METADATA
- Is picture file
- PICTURE CODEC LIST
- PICTURE LIBRARY LIST
- PICTURE PROPERTIES
- Picture size
- PICTURE TO BLOB
- PICTURE TO GIF
- PICTURE TYPE LIST
- QT COMPRESS PICTURE
- QT COMPRESS PICTURE FILE
- QT LOAD COMPRESS PICTURE FROM FILE
- READ PICTURE FILE
- REMOVE PICTURE FROM LIBRARY
- SAVE PICTURE TO FILE
- SET PICTURE FILE NAMENew
- SET PICTURE METADATA
- SET PICTURE TO LIBRARY
- TRANSFORM PICTURE
- WRITE PICTURE FILE
QT COMPRESS PICTURE FILE
| QT COMPRESS PICTURE FILE ( document ; method ; quality ) | ||||||||
| Parameter | Type | Description | ||||||
| document | DocRef |
|
Document reference number | |||||
| method | String |
|
4-character string compression method | |||||
| quality | Longint |
|
Compression quality (1..1000) | |||||
This command calls for obsolete mechanisms and is only kept for compatibility reasons. It has been favorably replaced by the WRITE PICTURE FILE or PICTURE TO BLOB commands.
This command compresses a picture document on disk. Use this command to compress a picture that you know cannot be loaded with the available memory. Once compressed, it can be loaded into memory using QT LOAD COMPRESS PICTURE FROM FILE.
Note: This command does not work on Windows.
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 method.
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.
Product: 4D
Theme: Pictures
Number:
359
Created: < 4D v6
Renamed: 4D v12
QT COMPRESS PICTURE
QT LOAD COMPRESS PICTURE FROM FILE
SAVE PICTURE TO FILE
