loadImage() timeout

Programming Questions

Greger

in Programming Questions • 2 years ago

I am loading a lot of pictures from the web, and sometimes I hit URLs for pictures/sites that are very slow.

Is there any posibility to make some sort of set timeout for how long it should try to load, and then give up?

Or is there maybe some other function I can use, with a timeout, that can download the picture locally first, and then I can load it, if it manages to download?

Replies(2)

cedrickie..

Re: loadImage() timeout

2 years ago

this might help :
http://wiki.processing.org/w/Asynchronous_data/image_loading

Greger

Re: loadImage() timeout

2 years ago

Thanks.

And here is the code I ended up writing/using:

From my sketch I just do a:

PImage i = AsynchLoadImage.loadImage(this, sr[pic], 10000);

Where the last parameter is the timeout in milliseconds.

class Loader extends Thread
{
public boolean done;
PImage p;
PApplet parent;
String f;
Loader(PApplet parent)
{
this.parent = parent;
done = true;
}
void load(String file)
{
if(this.done == true)
{
this.f = file;
this.done = false;
}
}
public void run()
{
if(this.done == false)
{
//System.out.println("Loader loading: " + this.f);
try
{
this.p = this.parent.loadImage(this.f);
}
catch(Exception e){
e.printStackTrace();
};
if(this.p != null)
{
//System.out.println(this.p.width + " " + this.p.height);
}
this.done = true;
//System.out.println("Loader done");
}
}
}
public class AsynchLoadImage
{
//PApplet parent;
public static PImage loadImage(PApplet parent, String file, int timeout)
{
Loader ldr = new Loader(parent);
ldr.start();
ldr.load(file);
long load = System.currentTimeMillis();
while(true)
{
//System.out.println("Checking: "+ ldr.done);
if(ldr.done == true)
{
//System.out.println("Returning image");
return ldr.p;
}
if((System.currentTimeMillis() - load) > timeout)
{
System.out.println("Timeout");
return null;
}
try
{
parent.delay(500);
} catch(Exception e) {}
}
}
}

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