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- 4D Language Reference
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- Pictures
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Pictures
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BLOB TO PICTURE
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COMBINE PICTURES
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CONVERT PICTURE
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CREATE THUMBNAIL
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Equal pictures
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Get picture file name
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GET PICTURE FORMATS
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GET PICTURE FROM LIBRARY
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GET PICTURE KEYWORDS
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GET PICTURE METADATA
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Is picture file
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PICTURE CODEC LIST
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PICTURE LIBRARY LIST
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PICTURE PROPERTIES
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Picture size
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PICTURE TO BLOB
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READ PICTURE FILE
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REMOVE PICTURE FROM LIBRARY
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SET PICTURE FILE NAME
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SET PICTURE METADATA
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SET PICTURE TO LIBRARY
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TRANSFORM PICTURE
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WRITE PICTURE FILE
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PICTURE TO BLOB
| PICTURE TO BLOB ( picture ; pictureBlob ; codec ) | ||||||||
| Parameter | Type | Description | ||||||
| picture | Picture |
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Picture field or variable | |||||
| pictureBlob | BLOB |
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BLOB to receive the converted picture | |||||
| codec | String |
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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).
You want to convert an image from a proprietary format to GIF format and display it on a static web page. You can use a code such as:
C_PICTURE($picture)
C_BLOB($BLOB)
C_TEXT($path)
$path:=Get 4D folder(Current resources folder)+"Images"+Folder separator+"Sunrise.psd" //find the picture in the Images folder within the Resources folder
READ PICTURE FILE($path;$picture) //put the picture in the picture variable
PICTURE TO BLOB($picture;$BLOB;".gif") //convert the picture to ".gif" format
WEB SEND BLOB($BLOB;"image/gif")
_o_PICTURE TO GIF
BLOB TO PICTURE
PICTURE CODEC LIST
WRITE PICTURE FILE
Product: 4D
Theme: Pictures
Number:
692
Modified: 4D v11 SQL
4D Language Reference ( 4D v20 R7)
