Thanks very much John.

For everyone's information, ExternalForm is not only for OpenCL (although that's the use-case that motivated it).  It is useful whenever you happen to have a pointer to external memory that you know holds pixels.   Here's a trivial example:

| extent form ptr |
extent := 400 at 300.
form := ExternalForm extent: extent depth: 32.
ptr := ExternalAddress gcallocate: (extent x * extent y * 4).
form setManualSurfacePointer: ptr.
Display displayScaledOn: form.
form displayAt: 0 at 0.
form destroySurface.

Cheers,
Josh




On Jun 15, 2010, at 5:57 PM, John M McIntosh wrote:

> In order to wrap up some VM fixes that should be pushed into the Squeak 4.x offering I've compiled up a 4.2.5beta1U VM
> 
> Someone should run the Sunit and smoke test to ensure the VM is sane. 
> 
> Follow the macintosh link from http://www.squeakvm.org/index.html
> 
> 4.2.5b1  		We update to VMMaker-jcg.182, and we make a new FFI plugin using the latest FFI code base (1.7.0) which includes Josh Gargus changes for FFI ExternalForms to support the OpenCL code.
> 
> --
> ===========================================================================
> John M. McIntosh <johnmci at smalltalkconsulting.com>   Twitter:  squeaker68882
> Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
> ===========================================================================
> 
> 
> 
> 
>