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

[Stifu]

I intended to file the bug (and still do), but the program I have on my hands
as is requires you to open a game ROM file first, which is something I
didn't want people to bother with.
It's definitely on my todo list, though.

In my program, I found a workaround (which is a little bit slower, but that
can't be noticed since it's blazing fast anyway). Here's that part of my
code:

if (PlatformInformation.IsMono()) // HACK Clone bug workaround (Mono only)
{
	// Slower than simply cloning the tile bitmap, but works with Mono
	// Cloning the tile bitmap returns a black tile with Mono
	this.tileClipboardCache = new Bitmap(tile.Width, tile.Height,
PixelFormat.Format24bppRgb);
	GdiDrawer.DrawTile(this.tileClipboardCache, 0, 0, tile);
}
else
{
	this.tileClipboardCache = (Bitmap)tile.Bitmap.Clone();
}


Alan McGovern-2 wrote:
> 
> Hey,
> 
> Well, if there's a bug then please try to reduce the testcase as much as
> possible before submitting it. If you can't it's still worth filing a bug
> and giving as much detail as you can.
> 
> If its working on .NET but not Mono that's not a good sign. I was
>> afraid of something like this.
> 
> 
> If there is an issue with a specific method, there are generally other
> ways
> of accomplishing exactly the same task. Sometimes all you need to do is
> use
> a different overload of the same method. For example here are two
> alternate
> methods of copying a bitmap, both of which are probably higher performance
> and both are definitely less bug prone:
> 
> http://msdn.microsoft.com/en-us/library/aa457087.aspx
> 
> So if you do encounter any issues, please file bug reports so they can be
> dealt with for the next release.
> 
> Alan.
> 
>>
>>
>>
>> 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
>> >>
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/LockBits%28%29-on-Mono-2.2--tp22611389p22611603.html
>> Sent from the Mono - General mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> Mono-list maillist  -  Mono-list at lists.ximian.com
>> http://lists.ximian.com/mailman/listinfo/mono-list
>>
> 
> _______________________________________________
> Mono-list maillist  -  Mono-list at lists.ximian.com
> http://lists.ximian.com/mailman/listinfo/mono-list
> 
> 

-- 
View this message in context: http://www.nabble.com/LockBits%28%29-on-Mono-2.2--tp22611389p22615715.html
Sent from the Mono - General mailing list archive at Nabble.com.