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Sets the JPEG/MIFF/PNG compression level (default 75).

Component Version macOS Windows Linux Server iOS SDK
GraphicsMagick 2.0 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "GMImage.SetQuality"; ImageRef; quality )   More


Parameter Description Example
ImageRef The image reference number. 1
quality a number in range of 0 to 100. 75


Returns "OK" on success.


Sets the JPEG/MIFF/PNG compression level (default 75).


Recompresses the image with JPEG compressor and a really bad quality:

Let ( [
$Image = MBS("GMImage.NewFromContainer"; GraphicsMagick::image);
$Result = MBS("GMImage.SetQuality";$Image; 5);
$Result = MBS("GMImage.WriteToJPEGContainer"; $Image);
$Error = MBS("GMImage.Release";$Image)

Converts to JPEG with 90% compression:

Set Variable [$ImageRef; Value:MBS("GMImage.NewFromContainer"; Test::BigImage)]
Set Variable [$Result; Value:MBS("GMImage.SetQuality"; $ImageRef; 90)]
Set Field [Test::Result; MBS( "GMImage.WriteToJPEGContainer"; $ImageRef )]
Set Variable [$Error; Value:MBS("GMImage.Release";$ImageRef)]

See also

Example Databases

Blog Entries

This function checks for a license.

Created 18th August 2014, last changed 21st December 2018

GMImage.SetProfile - GMImage.SetQuantizeColorSpace