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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
//
// \author Denis P. Shamonin and Marius Staring. Division of Image Processing,
// Department of Radiology, Leiden, The Netherlands
//
// \note This work was funded by the Netherlands Organisation for
// Scientific Research (NWO NRG-2010.02 and NWO 639.021.124).
//
// OpenCL implementation of itk::CastImageFilter
//------------------------------------------------------------------------------
// Apple OpenCL 1.0 support function
bool is_valid_3d( const uint3 index, const uint3 size )
{
/* NOTE: More than three-level nested conditional statements (e.g.,
if A && B && C..) invalidates command queue during kernel
execution on Apple OpenCL 1.0 (such Macbook Pro with NVIDIA 9600M
GT). Therefore, we flattened conditional statements. */
if ( index.x >= size.x ) { return false; }
if ( index.y >= size.y ) { return false; }
if ( index.z >= size.z ) { return false; }
return true;
}
//------------------------------------------------------------------------------
OUTPIXELTYPE Functor( const INPIXELTYPE in )
{
// Cast it and return
OUTPIXELTYPE out = (OUTPIXELTYPE)in;
return out;
}
//------------------------------------------------------------------------------
#ifdef DIM_1
__kernel void CastImageFilter( __global const INPIXELTYPE *in,
__global OUTPIXELTYPE *out,
uint width )
{
uint index = get_global_id( 0 );
if ( index < width )
{
out[index] = Functor( in[index] );
}
}
#endif
//------------------------------------------------------------------------------
#ifdef DIM_2
__kernel void CastImageFilter( __global const INPIXELTYPE *in,
__global OUTPIXELTYPE *out,
uint width, uint height )
{
uint2 index = (uint2)( get_global_id( 0 ), get_global_id( 1 ) );
uint2 size = (uint2)( width, height );
if ( index.x < width && index.y < height )
{
uint gidx = mad24( size.x, index.y, index.x );
out[gidx] = Functor( in[gidx] );
}
}
#endif
//------------------------------------------------------------------------------
#ifdef DIM_3
__kernel void CastImageFilter( __global const INPIXELTYPE *in,
__global OUTPIXELTYPE *out,
uint width, uint height, uint depth )
{
uint3 index = (uint3)( get_global_id( 0 ), get_global_id( 1 ), get_global_id( 2 ) );
uint3 size = (uint3)( width, height, depth );
if ( is_valid_3d( index, size ) )
{
uint gidx = mad24( size.x, mad24( index.z, size.y, index.y ), index.x );
out[gidx] = Functor( in[gidx] );
}
}
#endif
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