pngOpts.quality does not effect file size

[Ferb]

Hi,

When i set the pngOpts.quality tot 50, it seems to do nothing. What can i do to change the quality and so decrease the file size?

this is my save function



Code: Select allfunction SavePNG(saveFile){
    var pngOpts = new ExportOptionsSaveForWeb;
    pngOpts.format = SaveDocumentType.PNG
    pngOpts.PNG8 = false;
    pngOpts.transparency = true;
    pngOpts.interlaced = false;
    pngOpts.quality = 2;
    activeDocument.exportDocument(new File(saveFile),ExportType.SAVEFORWEB,pngOpts);
}

[Mike Hale]

The quality property in ExportOptionsSaveForWeb is only used when exporting jpeg.

PNG compression is new to CS6( unless you have a third party plug-in ). I don't think the scripting DOM has been updated to support PNG compression in ExportOptionsSaveForWeb. There is a new property in the PGNSaveOptions for use with the saveAs method.

My guess is you will need to either use saveAs with the new options or use scriptlistener to exportDocument a PNG with compression.

[Ferb]

Thanks for your reply.

Let me get this straight. In cs6 it is possible, everything below it's not possible. Unless i have a third party plugin which listens to my script so it can apply compression on saving?

Do you have any axample of a third party plugin and how i can use this in combination with my/a script?


*edit*

found a plugin called SuperPNG (http://www.creativebloq.com/photoshop/b ... ins-912722 ... ins-912722)
Is that any good?