;+
; NAME:
;    spheretool_gpu_detect
;
; PURPOSE:
;    Determine whether or not spheretool can run with GPU acceleration.
;
; CATEGORY:
;    Holographic video microscopy
;
; CALLING SEQUENCE:
;    Internal routine.  Not intended for independent use.
;    gpu = spheretool_gpu_detect()
;
; OUTPUTS:
;    gpu: 1 if GPU present and correctly initialized,
;         0 otherwise
;
; SIDE EFFECTS:
;    Initializes GPULIB, if present and hardware permits
;
; RESTRICTIONS:
;    GPU acceleration requires working installation of GPULIB
;    and suitable hardware.
;
; PROCEDURE:
;    Catch potential errors when an attempt is made to run
;    GPUINIT, /HARDWARE
;
; MODIFICATION HISTORY:
; 03/20/2009: David G. Grier, New York University.  Adapted from
;    GPU_DETECT() posted on Mike Galloy's GPULIB blog.
; 
; LICENSE
;
;    This program is free software; you can redistribute it and/or
;    modify it under the terms of the GNU General Public License as
;    published by the Free Software Foundation; either version 2 of the
;    License, or (at your option) any later version.
;
;    This program is distributed in the hope that it will be useful,
;    but WITHOUT ANY WARRANTY; without even the implied warranty of
;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;    General Public License for more details.
;
;    You should have received a copy of the GNU General Public License
;    along with this program; if not, write to the Free Software
;    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
;    02111-1307 USA
;
;    If the Internet and WWW are still functional when you are using
;    this, you shold be able to access the GPL here: 
;    http://www.gnu.org/copyleft/gpl.html
;-

function spheretool_gpu_detect
compile_opt idl2, hidden

catch, error
if (error ne 0L) then begin
   catch, /cancel
   return, 0
endif

gpuinit, /HARDWARE

return, 1
end