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function RestoreCluts
% RestoreCluts
%
% Restores the original CLUT's (aka gamma tables) in all graphics cards
% from backup copies made during calls to LoadIdentityClut() or
% BackupCluts(). This is mostly meant to undo changes made when operating
% high precision display devices and similar equipment.
%
% This is a no-operation if there aren't any CLUT's to restore.
%
% History:
% 05/31/08 mk Written.
global ptb_original_gfx_cluts;
if isempty(ptb_original_gfx_cluts)
% No backups available -- Nothing to do:
return;
end
% Iterate over all backup cluts and reload them:
for screenid=0:length(ptb_original_gfx_cluts)-1
if ~isempty(ptb_original_gfx_cluts{screenid + 1})
% Restore clut for 'screenid':
oldClut = ptb_original_gfx_cluts{screenid + 1};
Screen('LoadNormalizedGammaTable', screenid, oldClut);
ptb_original_gfx_cluts{screenid + 1} = [];
end
end
% All cluts restored from backup: Release array with backups itself:
ptb_original_gfx_cluts = [];
% Done.
return;
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