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2026-09-17 23:39:08 +09:00 · 2026-08-07 15:56:42 +09:00
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+% GARRAY function that helps to wrap the GPU functions for user so that CPU and
+% GPU code is identical 
+% If gpuDeviceCount > 0 or move_on_GPU == true, the returned array will be 
+% moved to GPU, otherwise it will be returned as single 
+%
+% array = Garray(array, move_on_GPU = true) 
+% 
+% Inputs: 
+%   **array         Ndim array 
+%   **move_on_GPU   if true, use GPU if possible 
+% retuns:
+%   ++array         Ndim array single or gpuArray single 
+
+%*-----------------------------------------------------------------------*
+%|                                                                       |
+%|  Except where otherwise noted, this work is licensed under a          |
+%|  Creative Commons Attribution-NonCommercial-ShareAlike 4.0            |
+%|  International (CC BY-NC-SA 4.0) license.                             |
+%|                                                                       |
+%|  Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch)    |
+%|                                                                       |
+%|       Author: CXS group, PSI                                          |
+%*-----------------------------------------------------------------------*
+% You may use this code with the following provisions:
+%
+% If the code is fully or partially redistributed, or rewritten in another
+%   computing language this notice should be included in the redistribution.
+%
+% If this code, or subfunctions or parts of it, is used for research in a 
+%   publication or if it is fully or partially rewritten for another 
+%   computing language the authors and institution should be acknowledged 
+%   in written form in the publication: “Data processing was carried out 
+%   using the “cSAXS matlab package” developed by the CXS group,
+%   Paul Scherrer Institut, Switzerland.” 
+%   Variations on the latter text can be incorporated upon discussion with 
+%   the CXS group if needed to more specifically reflect the use of the package 
+%   for the published work.
+%
+% A publication that focuses on describing features, or parameters, that
+%    are already existing in the code should be first discussed with the
+%    authors.
+%   
+% This code and subroutines are part of a continuous development, they 
+%    are provided “as they are” without guarantees or liability on part
+%    of PSI or the authors. It is the user responsibility to ensure its 
+%    proper use and the correctness of the results.
+
+
+function array = Garray(array, move_on_GPU)
+    persistent use_gpu
+    if nargin == 2 && ~isempty(move_on_GPU)
+        use_gpu = move_on_GPU; 
+    elseif isempty(use_gpu)
+        use_gpu = gpuDeviceCount > 0;   % always use GPU if not asked otherwise 
+    end
+    
+    if isa(array, 'double') && ~issparse(array)
+        %% avoid doubles ... 
+        array = single(array);
+    end   
+   
+    if isa(array, 'gpuArray') || ~use_gpu
+       return 
+    end
+
+    array = gpuArray(array);
+
+end