mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-05 18:08:59 +00:00
266 lines
8.4 KiB
C++
266 lines
8.4 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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// 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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// Copyright 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#include <vtkm/rendering/CanvasRayTracer.h>
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#include <vtkm/cont/TryExecute.h>
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#include <vtkm/exec/ExecutionWholeArray.h>
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#include <vtkm/rendering/Canvas.h>
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#include <vtkm/rendering/Color.h>
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#include <vtkm/rendering/raytracing/Ray.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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namespace vtkm
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{
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namespace rendering
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{
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namespace internal
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{
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class ClearBuffers : public vtkm::worklet::WorkletMapField
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{
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vtkm::rendering::Color ClearColor;
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public:
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VTKM_CONT
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ClearBuffers(const vtkm::rendering::Color& clearColor)
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: ClearColor(clearColor)
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{
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}
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typedef void ControlSignature(FieldOut<>, FieldOut<>);
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typedef void ExecutionSignature(_1, _2);
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VTKM_EXEC
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void operator()(vtkm::Vec<vtkm::Float32, 4>& color, vtkm::Float32& depth) const
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{
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color = this->ClearColor.Components;
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depth = 1.001f;
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}
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}; //class ClearBuffers
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struct ClearBuffersInvokeFunctor
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{
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typedef vtkm::rendering::Canvas::ColorBufferType ColorBufferType;
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typedef vtkm::rendering::Canvas::DepthBufferType DepthBufferType;
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ClearBuffers Worklet;
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ColorBufferType ColorBuffer;
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DepthBufferType DepthBuffer;
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VTKM_CONT
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ClearBuffersInvokeFunctor(const vtkm::rendering::Color& backgroundColor,
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const ColorBufferType& colorBuffer,
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const DepthBufferType& depthBuffer)
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: Worklet(backgroundColor)
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, ColorBuffer(colorBuffer)
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, DepthBuffer(depthBuffer)
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{
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}
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template <typename Device>
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VTKM_CONT bool operator()(Device) const
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{
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VTKM_IS_DEVICE_ADAPTER_TAG(Device);
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vtkm::worklet::DispatcherMapField<ClearBuffers, Device> dispatcher(this->Worklet);
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dispatcher.Invoke(this->ColorBuffer, this->DepthBuffer);
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return true;
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}
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};
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class SurfaceConverter : public vtkm::worklet::WorkletMapField
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{
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vtkm::Float32 Proj22;
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vtkm::Float32 Proj23;
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vtkm::Float32 Proj32;
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public:
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VTKM_CONT
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SurfaceConverter(const vtkm::Matrix<vtkm::Float32, 4, 4> projMat)
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{
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Proj22 = projMat[2][2];
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Proj23 = projMat[2][3];
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Proj32 = projMat[3][2];
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}
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typedef void ControlSignature(FieldIn<>, WholeArrayIn<>, FieldIn<>, ExecObject, ExecObject);
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typedef void ExecutionSignature(_1, _2, _3, _4, _5, WorkIndex);
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template <typename Precision, typename ColorPortalType>
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VTKM_EXEC void operator()(
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const vtkm::Id& pixelIndex,
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ColorPortalType& colorBufferIn,
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const Precision& inDepth,
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vtkm::exec::ExecutionWholeArray<vtkm::Float32>& depthBuffer,
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vtkm::exec::ExecutionWholeArray<vtkm::Vec<vtkm::Float32, 4>>& colorBuffer,
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const vtkm::Id& index) const
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{
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vtkm::Float32 depth = (Proj22 + Proj23 / (-static_cast<vtkm::Float32>(inDepth))) / Proj32;
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depth = 0.5f * depth + 0.5f;
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vtkm::Vec<vtkm::Float32, 4> color;
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color[0] = static_cast<vtkm::Float32>(colorBufferIn.Get(index * 4 + 0));
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color[1] = static_cast<vtkm::Float32>(colorBufferIn.Get(index * 4 + 1));
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color[2] = static_cast<vtkm::Float32>(colorBufferIn.Get(index * 4 + 2));
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color[3] = static_cast<vtkm::Float32>(colorBufferIn.Get(index * 4 + 3));
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depthBuffer.Set(pixelIndex, depth);
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colorBuffer.Set(pixelIndex, color);
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}
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}; //class SurfaceConverter
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template <typename Precision>
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struct WriteFunctor
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{
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protected:
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vtkm::rendering::CanvasRayTracer* Canvas;
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const vtkm::cont::ArrayHandle<Precision>& Distances;
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const vtkm::cont::ArrayHandle<Precision>& Colors;
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const vtkm::cont::ArrayHandle<vtkm::Id>& PixelIds;
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const vtkm::rendering::Camera& CameraView;
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public:
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VTKM_CONT
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WriteFunctor(vtkm::rendering::CanvasRayTracer* canvas,
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const vtkm::cont::ArrayHandle<Precision>& distances,
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const vtkm::cont::ArrayHandle<Precision>& colors,
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const vtkm::cont::ArrayHandle<vtkm::Id>& pixelIds,
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const vtkm::rendering::Camera& camera)
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: Canvas(canvas)
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, Distances(distances)
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, Colors(colors)
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, PixelIds(pixelIds)
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, CameraView(camera)
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{
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}
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template <typename Device>
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VTKM_CONT bool operator()(Device)
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{
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VTKM_IS_DEVICE_ADAPTER_TAG(Device);
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vtkm::worklet::DispatcherMapField<SurfaceConverter, Device>(
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SurfaceConverter(
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this->CameraView.CreateProjectionMatrix(Canvas->GetWidth(), Canvas->GetHeight())))
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.Invoke(
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PixelIds,
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Colors,
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Distances,
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vtkm::exec::ExecutionWholeArray<vtkm::Float32>(Canvas->GetDepthBuffer()),
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vtkm::exec::ExecutionWholeArray<vtkm::Vec<vtkm::Float32, 4>>(Canvas->GetColorBuffer()));
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return true;
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}
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};
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template <typename Precision>
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VTKM_CONT void WriteToCanvas(const vtkm::cont::ArrayHandle<vtkm::Id>& pixelIds,
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const vtkm::cont::ArrayHandle<Precision>& distances,
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const vtkm::cont::ArrayHandle<Precision>& colors,
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const vtkm::rendering::Camera& camera,
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vtkm::rendering::CanvasRayTracer* canvas)
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{
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WriteFunctor<Precision> functor(canvas, distances, colors, pixelIds, camera);
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vtkm::cont::TryExecute(functor);
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//Force the transfer so the vectors contain data from device
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canvas->GetColorBuffer().GetPortalControl().Get(0);
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canvas->GetDepthBuffer().GetPortalControl().Get(0);
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}
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} // namespace internal
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CanvasRayTracer::CanvasRayTracer(vtkm::Id width, vtkm::Id height)
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: Canvas(width, height)
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{
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}
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CanvasRayTracer::~CanvasRayTracer()
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{
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}
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void CanvasRayTracer::Initialize()
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{
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// Nothing to initialize
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}
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void CanvasRayTracer::Activate()
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{
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// Nothing to activate
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}
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void CanvasRayTracer::Finish()
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{
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// Nothing to finish
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}
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void CanvasRayTracer::Clear()
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{
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// TODO: Should the rendering library support policies or some other way to
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// configure with custom devices?
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vtkm::cont::TryExecute(internal::ClearBuffersInvokeFunctor(
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this->GetBackgroundColor(), this->GetColorBuffer(), this->GetDepthBuffer()));
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}
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void CanvasRayTracer::WriteToCanvas(const vtkm::cont::ArrayHandle<vtkm::Id>& pixelIds,
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const vtkm::cont::ArrayHandle<vtkm::Float32>& distances,
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const vtkm::cont::ArrayHandle<vtkm::Float32>& colors,
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const vtkm::rendering::Camera& camera)
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{
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internal::WriteToCanvas(pixelIds, distances, colors, camera, this);
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}
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void CanvasRayTracer::WriteToCanvas(const vtkm::cont::ArrayHandle<vtkm::Id>& pixelIds,
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const vtkm::cont::ArrayHandle<vtkm::Float64>& distances,
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const vtkm::cont::ArrayHandle<vtkm::Float64>& colors,
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const vtkm::rendering::Camera& camera)
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{
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internal::WriteToCanvas(pixelIds, distances, colors, camera, this);
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}
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vtkm::rendering::Canvas* CanvasRayTracer::NewCopy() const
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{
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return new vtkm::rendering::CanvasRayTracer(*this);
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}
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void CanvasRayTracer::AddLine(const vtkm::Vec<vtkm::Float64, 2>&,
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const vtkm::Vec<vtkm::Float64, 2>&,
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vtkm::Float32,
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const vtkm::rendering::Color&) const
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{
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// Not implemented
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}
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void CanvasRayTracer::AddColorBar(const vtkm::Bounds&,
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const vtkm::rendering::ColorTable&,
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bool) const
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{
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// Not implemented
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}
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void CanvasRayTracer::AddText(const vtkm::Vec<vtkm::Float32, 2>&,
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vtkm::Float32,
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vtkm::Float32,
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vtkm::Float32,
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const vtkm::Vec<vtkm::Float32, 2>&,
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const vtkm::rendering::Color&,
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const std::string&) const
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{
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// Not implemented
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}
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}
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}
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