[Insight-users] ITK4 and GPU with OpenCL. How to compile?

[Denis Shamonin]

Dear All,

We are very interested to try the current  ITK4 GPU implementation with OpenCL.
But unfortunately the CMake files ITK4\Modules\GPU are not finished
and have status To Be Done ( itk-module-TBD.cmake )
After spending some time to compile and fixing Cmake files for this
module. I've decided to ask here.

Could you point me to exact steps I have to follow to add
ITK-GPUCommon module? So, That I could start playing.
I've almost made it with some hacks all around.
Does anyone have working solution to share with tests included? That
would be great.

BTW: I've spotted error in GPUMeanImageFilter.cl

    for(int z = max(0, (int)(giz-radiusz)); z <= min((int)(depth-1),
(int)giz+radiusz)); z++)  line : 81 <- wrong
    for(int z = max(0, (int)(giz-radiusz)); z <= min((int)(depth-1),
(int)(giz+radiusz)); z++) line : 81 <- correct

Thank you,
-Denis

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My current CMakeList.txt for this module look like this:

project(ITK-GPUCommon)

IF (ITK_USE_GPU)
	FIND_PACKAGE( OpenCL REQUIRED )

  FILE(GLOB itkGPUSRC RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}/src *.cl)
  FILE(GLOB itkGPUHDR RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}/include *.h)
  FILE(GLOB itkTxxSRC  RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}/include *.txx)

  SOURCE_GROUP("OpenCL Source Files" FILES ${itkGPUSRC})

  FILE(COPY ${itkGPUSRC} DESTINATION ${ITK_BINARY_DIR}/GPU/Common)
  MESSAGE( "OpenCL files to copy " ${itkGPUSRC} )

	INCLUDE_DIRECTORIES(
	${OPENCL_INCLUDE_DIRS}
	)

ENDIF(ITK_USE_GPU)

set(ITK-GPUCommon_LIBRARIES ITK-GPUCommon)
configure_file(src/pathToOpenCLSourceCode.h.in pathToOpenCLSourceCode.h)

itk_module_impl()

#install(FILES
#  pathToOpenCLSourceCode.h	
#  DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}
#  )