[wxhaskell-devel] darcs patch: Add withImageData and withPixelBuffer (f... (and 1 more)

[Eric K. <eri...@gm...>]

Sat Mar 15 15:13:39 GMT 2008  Eric Kow <eri...@gm...>
  * Add withImageData and withPixelBuffer (fixes bug 1003006).
  
  Quoting Jules Bean, whose solution I implemented:
  
  > 1    image <- imageCreateSized (WX.Size 256 256)                                                                   
  > 2    pixels <- imageGetData image                                                                                  
  > 3    bytes <- peekArray (256*256*3) (castPtr pixels)                                                               
  >                                                                                                                    
  >                                                                                                                    
  > After line 2 is executed, there is no remaining reference to 'image' in                                            
  > the program. 'image' is dead, and can be garbage collected. (Although it                                           
  > may not be at any particular time). If 'image' gets GC'ed, because there                                           
  > is a ForeignPtr inside, that calls the C++ destructor. The wxImage C++                                             
  > destructor believes it owns the data block, so it free()s it, and                                                  
  > 'pixels' is left pointing to a free()ed block. 
   

Sat Mar 15 15:16:41 GMT 2008  Eric Kow <eri...@gm...>
  * Add a test for a possible treeCtrl bug.