/usr/share/psychtoolbox-3/PsychAlphaBlending/AlphaBlend.m is in psychtoolbox-3-common 3.0.9+svn2579.dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | function newImage=AlphaBlend(sourceFactorStr, destinationFactorStr, sourceImage, destinationImage)
% newImage=AlphaBlend(sourceFactorStr, destinationFactorStr, sourceImage, destinationImage)
%
% Simulate alpha blending. Calculate an image matrix which matches the
% result of alpha blending in a a window by Screen.
%
% see also: PsychAlphaBlending
% HISTORY
%
% mm/dd/yy
%
% 2/11/05 awi wrote it.
newImage=AlphaSum( AlphaSourceTerm(sourceFactorStr, sourceImage, destinationImage), ...
AlphaDestinationTerm(destinationFactorStr, sourceImage, destinationImage));
|