[Squeakfoundation]3.4 release

John M McIntosh johnmci at smalltalkconsulting.com
Thu Feb 6 14:10:50 CET 2003

Ah, you mean in?

int mpeg3_set_transparent (mpeg3_t *file, int aNumber, int aStream) {
	file->vtrack[aStream]->video->alphaChannelValue = aNumber & 0xFF;

That is, while actually should be a 16bit value, which was realized  
later in the process, but no-one I uses a 64 bit color spaced  
A16R16G16B16 yet so I ignored the issue with a note in that this won't  
work for that type of address space. This 8 bit value is stuck into the  
ARGB and RGBA etc at the right place at the right time.

On Thursday, February 6, 2003, at 10:30  AM, Tim Rowledge wrote:

>> the new masking that's going on looks a little suspicious -- e.g.,  
>> are we
>> _sure_ that 0xff is the right mask for the alpha channel on machines  
>> where
>> the pixel format is ARGB? ;).
John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com

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