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Re: Drawing problem

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  To: comp.lang.java.gui
Knute Johnson wrote:
> I don't have any links for you but BufferedImage is not a Swing 
> component and therefore won't have any problems being modified outside 
> of the EDT.  

To me this seems not to be a reason since I wouldn't consider the whole 
thing specific to the EDT.

If one modifies an object (an instance of BufferedImage) outside of one 
thread (the EDT) while this thread accesses it (during EDT's paint 
operation) there are two threads that access the same object.

The question then is if the object is in a determinable state at the 
time a thread accesses it.

Since the modifying thread is the only thread that changes the object's 
state, the modifying thread always gets an object whose state can be 
determined.

In general this isn't true to any other thread since it might get an 
object whose state is currently being modified.

So: Are there any guarantees that the EDT paint operation draws a 
BufferedImage that is in a state as it was before any Graphics (created 
via the BufferedImage) method was started that has not yet finished?

Bye
Michael

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Drawing problem "Robert Sturzenegger" <robert.sturzenegger@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
  Re: Drawing problem "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
    Re: Drawing problem "Robert Sturzenegger" <robert.sturzenegger@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
  Re: Drawing problem "Michael Rauscher" <michael.rauscher@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
    Re: Drawing problem "Robert Sturzenegger" <robert.sturzenegger@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
      Re: Drawing problem "Michael Rauscher" <michael.rauscher@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
        Re: Drawing problem "Knute Johnson" <knute.johnson@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
          Re: Drawing problem "Michael Rauscher" <michael.rauscher@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
            Re: Drawing problem "Knute Johnson" <knute.johnson@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
              Re: Drawing problem "Michael Rauscher" <michael.rauscher@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
                Re: Drawing problem "Knute Johnson" <knute.johnson@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
                Re: Drawing problem "Michael Rauscher" <michael.rauscher@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000
        Re: Drawing problem "Robert Sturzenegger" <robert.sturzenegger@THRWHITE.remove-dii-this> - 2011-04-27 15:31 +0000

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