[Mono-list] LockBits() on Mono 2.2?

LKeene lionel.keene at gmail.com
Thu Mar 19 19:32:04 EDT 2009

Hi Stifu,
Uh oh. 
On what platform are you getting those (bad) results?

By "cloning" I'm assuming you are applying LockBits() to two bitmaps,
stepping through the first and copying the bytes into the second, then
unlocking? If its working on .NET but not Mono that's not a good sign. I was
afraid of something like this. 

Stifu wrote:
> I found a certain GDI+ bug recently, and I *think* it's related to
> LockBits(). I'm not sure, and didn't report the bug as I couldn't make a
> reduced test case yet. However, if you're interested, I can send you my
> not-so-reduced test case so you can have a look.
> But to sum things up: I have a Bitmap, try to clone it, and the cloned
> Bitmap is all black... while this works fine with .NET.
> LKeene wrote:
>> Hello all, I have a general question regarding the use of LockBits() (in
>> GDI+) for reading/writing to a bitmap.  I'm using Mono 2.2 and am
>> targeting Windows, OSX and Linux. Any current issues concerning the use
>> of LockBits()/UnlockBits() I should be aware of? Any nasty buggies I
>> should be on the lookout for? I found a few posts pertaining to this but
>> they're not very current. 
>> Thanks eveyone.
>> -L

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