mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_worklet_colorconversion_ShiftScaleToRGB_h
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#define vtk_m_worklet_colorconversion_ShiftScaleToRGB_h
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#include <vtkm/worklet/colorconversion/Conversions.h>
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#include <vtkm/Math.h>
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namespace vtkm
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{
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namespace worklet
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{
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namespace colorconversion
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{
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struct ShiftScaleToRGB : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn in, FieldOut out);
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using ExecutionSignature = _2(_1);
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ShiftScaleToRGB(vtkm::Float32 shift, vtkm::Float32 scale)
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: Shift(shift)
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, Scale(scale)
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{
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec3ui_8 operator()(const T& in) const
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{ //vtkScalarsToColorsLuminanceToRGB
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vtkm::Float32 l = (static_cast<vtkm::Float32>(in) + this->Shift) * this->Scale;
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colorconversion::Clamp(l);
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return vtkm::Vec3ui_8{ static_cast<vtkm::UInt8>(l + 0.5f) };
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec3ui_8 operator()(const vtkm::Vec<T, 2>& in) const
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{ //vtkScalarsToColorsLuminanceAlphaToRGB (which actually doesn't exist in vtk)
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return this->operator()(in[0]);
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec3ui_8 operator()(const vtkm::Vec<T, 3>& in) const
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{ //vtkScalarsToColorsRGBToRGB
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vtkm::Vec3f_32 rgb(in);
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rgb = (rgb + vtkm::Vec3f_32(this->Shift)) * this->Scale;
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colorconversion::Clamp(rgb);
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return vtkm::Vec3ui_8{ static_cast<vtkm::UInt8>(rgb[0] + 0.5f),
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static_cast<vtkm::UInt8>(rgb[1] + 0.5f),
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static_cast<vtkm::UInt8>(rgb[2] + 0.5f) };
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec3ui_8 operator()(const vtkm::Vec<T, 4>& in) const
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{ //vtkScalarsToColorsRGBAToRGB
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return this->operator()(vtkm::Vec<T, 3>{ in[0], in[1], in[2] });
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}
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private:
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const vtkm::Float32 Shift;
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const vtkm::Float32 Scale;
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};
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}
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}
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}
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#endif
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