Remove Initialize() boilerplate.

README.md

@@ -200,7 +200,6 @@ scene.AddActor(vtkm::rendering::Actor(outputData.GetCellSet(),
                                       outputData.GetField(fieldName),
                                       colorTable));
 vtkm::rendering::View3D view(scene, mapper, canvas, camera, bg);
-view.Initialize();
 view.Paint();
 view.SaveAs("demo_output.png");
 ```

examples/demo/Demo.cxx

@@ -71,7 +71,6 @@ int main(int argc, char* argv[])
   scene.AddActor(actor);
   // Create a view and use it to render the input data using OS Mesa
   vtkm::rendering::View3D view(scene, mapper, canvas, camera, bg);
-  view.Initialize();
   view.Paint();
   view.SaveAs("demo_input.pnm");
 
@@ -96,7 +95,6 @@ int main(int argc, char* argv[])
   scene2.AddActor(actor2);
 
   vtkm::rendering::View3D view2(scene2, mapper, canvas, camera, bg);
-  view2.Initialize();
   view2.Paint();
   view2.SaveAs("demo_output.pnm");
 

examples/polyline_archimedean_helix/PolyLineArchimedeanHelix.cxx

@@ -120,7 +120,6 @@ void TubeThatSpiral(vtkm::FloatDefault radius, vtkm::Id numLineSegments, vtkm::I
                                         tubeDataset.GetField("Spiral Radius"),
                                         colorTable));
   vtkm::rendering::View3D view(scene, mapper, canvas, camera, bg);
-  view.Initialize();
   view.Paint();
   // We can save the file as a .NetBPM:
   std::string output_filename = "tube_output_" + std::to_string(numSides) + "_sides.pnm";

vtkm/interop/testing/UnitTestFancyTransferEGL.cxx

@@ -17,7 +17,6 @@ int UnitTestFancyTransferEGL(int argc, char* argv[])
 
   //get egl canvas to construct a context for us
   vtkm::rendering::CanvasEGL canvas(1024, 1024);
-  canvas.Initialize();
   canvas.Activate();
 
   //get glew to bind all the opengl functions

vtkm/interop/testing/UnitTestFancyTransferOSMesa.cxx

@@ -18,7 +18,6 @@ int UnitTestFancyTransferOSMesa(int argc, char* argv[])
 
   //get osmesa canvas to construct a context for us
   vtkm::rendering::CanvasOSMesa canvas(1024, 1024);
-  canvas.Initialize();
   canvas.Activate();
 
   //get glew to bind all the opengl functions

vtkm/interop/testing/UnitTestTransferEGL.cxx

@@ -20,7 +20,6 @@ int UnitTestTransferEGL(int argc, char* argv[])
 
   //get egl canvas to construct a context for us
   vtkm::rendering::CanvasEGL canvas(1024, 1024);
-  canvas.Initialize();
   canvas.Activate();
 
   //get glew to bind all the opengl functions

vtkm/interop/testing/UnitTestTransferOSMesa.cxx

@@ -20,7 +20,6 @@ int UnitTestTransferOSMesa(int argc, char* argv[])
 
   //get osmesa canvas to construct a context for us
   vtkm::rendering::CanvasOSMesa canvas(1024, 1024);
-  canvas.Initialize();
   canvas.Activate();
 
   //get glew to bind all the opengl functions

vtkm/io/testing/UnitTestImageWriter.cxx

@@ -151,7 +151,6 @@ void TestImage()
 {
   vtkm::rendering::Canvas canvas(16, 16);
   canvas.SetBackgroundColor(vtkm::rendering::Color::red);
-  canvas.Initialize();
   canvas.Activate();
   canvas.Clear();
   // Line from top left to bottom right, ensures correct transposedness

vtkm/rendering/Canvas.h

@@ -43,6 +43,7 @@ public:
 
   virtual vtkm::rendering::Canvas* NewCopy() const;
 
+  VTKM_DEPRECATED(1.6, "Initialize() does nothing.")
   virtual void Initialize();
 
   virtual void Activate();

vtkm/rendering/MapperWireframer.cxx

@@ -341,7 +341,6 @@ void MapperWireframer::RenderCells(const vtkm::cont::DynamicCellSet& inCellSet,
     CanvasRayTracer canvas(this->Internals->Canvas->GetWidth(),
                            this->Internals->Canvas->GetHeight());
     canvas.SetBackgroundColor(vtkm::rendering::Color::white);
-    canvas.Initialize();
     canvas.Activate();
     canvas.Clear();
     MapperRayTracer raytracer;

vtkm/rendering/View.cxx

@@ -152,7 +152,7 @@ void View::SetForegroundColor(const vtkm::rendering::Color& color)
 
 void View::Initialize()
 {
-  this->GetCanvas().Initialize();
+  // does nothing
 }
 
 void View::SaveAs(const std::string& fileName) const

vtkm/rendering/View.h

@@ -82,6 +82,7 @@ public:
   VTKM_CONT
   void SetForegroundColor(const vtkm::rendering::Color& color);
 
+  VTKM_DEPRECATED(1.6, "Initialize() does nothing.");
   virtual void Initialize();
 
   virtual void Paint() = 0;

vtkm/rendering/testing/RenderTest.h

@@ -83,7 +83,6 @@ inline void SetCamera<vtkm::rendering::View1D>(vtkm::rendering::Camera& camera,
 template <typename MapperType, typename CanvasType, typename ViewType>
 void Render(ViewType& view, const std::string& outputFile)
 {
-  view.Initialize();
   view.Paint();
   view.SaveAs(outputFile);
 }

vtkm/rendering/testing/UnitTestCanvas.cxx

@@ -19,7 +19,6 @@ void RenderTests()
 {
   vtkm::rendering::Canvas canvas;
   canvas.SetBackgroundColor(vtkm::rendering::Color::white);
-  canvas.Initialize();
   canvas.Activate();
   canvas.Clear();
   canvas.AddLine(-0.8, 0.8, 0.8, 0.8, 1.0f, vtkm::rendering::Color::black);