mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
92 lines
3.0 KiB
C++
92 lines
3.0 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_ShiftScaleToRGBA_h
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#define vtk_m_worklet_colorconversion_ShiftScaleToRGBA_h
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#include <vtkm/worklet/WorkletMapField.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 ShiftScaleToRGBA : public vtkm::worklet::WorkletMapField
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{
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const vtkm::Float32 Shift;
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const vtkm::Float32 Scale;
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const vtkm::Float32 Alpha;
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using ControlSignature = void(FieldIn in, FieldOut out);
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using ExecutionSignature = _2(_1);
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ShiftScaleToRGBA(vtkm::Float32 shift, vtkm::Float32 scale, vtkm::Float32 alpha)
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: WorkletMapField()
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, Shift(shift)
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, Scale(scale)
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, Alpha(alpha)
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{
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec4ui_8 operator()(const T& in) const
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{ //vtkScalarsToColorsLuminanceToRGBA
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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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const vtkm::UInt8 lc = static_cast<vtkm::UInt8>(l + 0.5);
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return vtkm::Vec4ui_8{ lc, lc, lc, colorconversion::ColorToUChar(this->Alpha) };
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec4ui_8 operator()(const vtkm::Vec<T, 2>& in) const
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{ //vtkScalarsToColorsLuminanceAlphaToRGBA
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vtkm::Vec2f_32 la(in);
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la = (la + vtkm::Vec2f_32(this->Shift)) * this->Scale;
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colorconversion::Clamp(la);
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const vtkm::UInt8 lc = static_cast<vtkm::UInt8>(la[0] + 0.5f);
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return vtkm::Vec4ui_8{ lc, lc, lc, static_cast<vtkm::UInt8>((la[1] * this->Alpha) + 0.5f) };
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec4ui_8 operator()(const vtkm::Vec<T, 3>& in) const
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{ //vtkScalarsToColorsRGBToRGBA
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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::Vec4ui_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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colorconversion::ColorToUChar(this->Alpha) };
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec4ui_8 operator()(const vtkm::Vec<T, 4>& in) const
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{ //vtkScalarsToColorsRGBAToRGBA
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vtkm::Vec4f_32 rgba(in);
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rgba = (rgba + vtkm::Vec4f_32(this->Shift)) * this->Scale;
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colorconversion::Clamp(rgba);
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rgba[3] *= this->Alpha;
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return vtkm::Vec4ui_8{ static_cast<vtkm::UInt8>(rgba[0] + 0.5f),
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static_cast<vtkm::UInt8>(rgba[1] + 0.5f),
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static_cast<vtkm::UInt8>(rgba[2] + 0.5f),
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static_cast<vtkm::UInt8>(rgba[3] + 0.5f) };
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}
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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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