[libGD] #92 [Comment added] imagearc/imagefilledarc DoS fix problem

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The following task has a new comment added:

FS#92 - imagearc/imagefilledarc DoS fix problem
User who did this - Pierre Joye (Pierre)

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> Say you feed it with two values, one being a 0% slice, and another being a 100% slice. Imagearc would be fed: 0%: 270, 270 100%: 270, 630

The script should fix its logic, it seems wrong to play with these values like that :) But the regression is here and should be fixed: Let say if the input start-end:

  - 10 - 20: arc from 10 to 20
  - 20 - 10: arc from 20 to 10 (through 0, large arc)
  - 0 - 360: full
  - 0 - 380: 0 -> 20 (overdrawn two times the last 20°? :)
  - 270 - 630: full (like 0 -> 360)
  - 270 - 270: nothing, equal before sanitization

I think that covers all cases. I will try to produce a test case for each of them later tonight. Can you try it with your script with or without the fix?

Thanks,
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More information can be found at the following URL:
http://bugs.libgd.org/?do=details&task_id=92#comment287

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