MemoryBlocks

General
1

Is there a way to convert a Xojo.Core.MemoryBlock to a classic framework MemoryBlock? I’m playing around with the Picture.FromData() method but that requires the data to be in the format of the old MemoryBlock where I have the data as a Xojo.Core.MemoryBlock.

2

The new MemoryBlock Data property will give you a Ptr. You can create a classic MemoryBlock with that Ptr, then copy the data to a “regular” MemoryBlock.

dim temp as MemoryBlock  = newMb.Data
dim mb as new MemoryBlock( newMb.Size )
mb.StringValue( 0, mb.Size ) = temp.StringValue( 0, mb.Size )
temp = nil
3

Really helpful Kem. Thank you.

4

Please support case 39159 for a way to do this without copying bytes.

5 
Dim classicMB As New MemoryBlock(newMb.Data)
6

@Eli Ott This does not help. The classicMB is invalid when newMb gets deleted and has no size set, so the range checks don’t work.

7

Of course.

8

Christian’s right. The lack of a size parameter screws up a number of operations - the Picture.FromData method for one…

I’ve added my support to the feedback case @Christian Schmitz

9

Thanks.

10

12 Feedback Points added :slight_smile:

11

75 points from me

12

Thanks.