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Index › Programming Questions & Help › Syntax Questions › uploading transparent images to a server...
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uploading transparent images to a server... (Read 426 times)
kirk is
uploading transparent images to a server...
May 19th, 2009, 2:33pm  
So, I want to make a custom doodle program (mostly for my own use, on a few of my tablet PCs)... ideally I would have a web page that would save the file on the server, and include transparency.

I started playing with postToWeb , but couldn't get the PHP working - nor my own Perl upload script I've relied on in the past... and my webhost isn't making it easy to see the error logs, but that's not a problem for this place. Besides, I suspect that if createGraphics.save()s are the main supported way of making transparent PNGs, then postToWeb probably isn't doing that anyway.

So, I dunno. Maybe a client application, save from a offscreen graphic, and one of the FTP libraries? Any other things alternatives I should consider?
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PhiLho 
Re: uploading transparent images to a server...
Reply #1 - May 19th, 2009, 11:17pm  
I don't see why the transparency shouldn't be preserved.
Although I haven't tried, and don't have time right now.
But note that drawings on screen have no transparency. You have to draw on a PGraphics and pass it to the data upload method, instead of g.image:
bOK = du.UploadImage("snapshot." + currentFormat, (BufferedImage) someGraphics.image);
Again, not tested yet, will try later.

If you cannot run a PHP script on your host, you can perhaps use FTP, but not in an applet: remember than connection details will be in the .jar, so anybody could easily get access to your server by analyzing it.

Now, you should try and debug, perhaps you have no write access to the target folder or something.
You can also set up a server on your own computer and experiment from there, that's what I do first.
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