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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::MatrixOffsetTransformBase
//------------------------------------------------------------------------------
// Definition of GPUMatrixOffsetTransformBase 1D/2D/3D
#ifdef DIM_1
typedef struct {
float matrix;
float offset;
} GPUMatrixOffsetTransformBase1D;
#endif // DIM_1
#ifdef DIM_2
typedef struct {
float4 matrix;
float2 offset;
} GPUMatrixOffsetTransformBase2D;
#endif // DIM_2
#ifdef DIM_3
typedef struct {
float16 matrix; // OpenCL does not have float9
float3 offset;
} GPUMatrixOffsetTransformBase3D;
#endif // DIM_3
//------------------------------------------------------------------------------
#ifdef DIM_1
float matrix_offset_transform_point_1d(
const float point,
const float matrix,
const float offset )
{
return mad( matrix, point, offset );
}
#endif // DIM_1
//------------------------------------------------------------------------------
#ifdef DIM_2
float2 matrix_offset_transform_point_2d(
const float2 point,
const float4 matrix,
const float2 offset )
{
float2 tpoint = offset;
float2 rowx = matrix.s01;
float2 rowy = matrix.s23;
tpoint.x += dot( rowx, point );
tpoint.y += dot( rowy, point );
return tpoint;
}
#endif // DIM_2
//------------------------------------------------------------------------------
#ifdef DIM_3
float3 matrix_offset_transform_point_3d(
const float3 point,
const float16 matrix,
const float3 offset )
{
float3 tpoint = offset.xyz;
float3 rowx = matrix.s012;
float3 rowy = matrix.s345;
float3 rowz = matrix.s678;
tpoint.x += dot( rowx, point );
tpoint.y += dot( rowy, point );
tpoint.z += dot( rowz, point );
return tpoint;
}
#endif // DIM_3
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