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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkJSONRenderWindowExporter.h"
#include <vtkDataObject.h>
#include <vtkDataSet.h>
#include <vtkObjectFactory.h>
#include <vtkRenderWindow.h>
#include <vtkViewNode.h>
#include "vtkArchiver.h"
#include "vtkJSONDataSetWriter.h"
#include "vtkVtkJSSceneGraphSerializer.h"
#include "vtkVtkJSViewNodeFactory.h"
#include <memory>
#include <sstream>
VTK_ABI_NAMESPACE_BEGIN
namespace
{
// When exporting a VTK render window, we must also write the datasets
// associated with the render window into the same archive. To do this, we
// construct an intermediate archiver that neither opens nor closes the
// archive and simply pipes its contents into a subdirectory of a parent
// archive.
class vtkJSONDataSetArchiver : public vtkArchiver
{
public:
static vtkJSONDataSetArchiver* New();
vtkTypeMacro(vtkJSONDataSetArchiver, vtkArchiver);
virtual void SetRenderWindowArchiver(vtkArchiver*);
vtkGetObjectMacro(RenderWindowArchiver, vtkArchiver);
void OpenArchive() override {}
void CloseArchive() override {}
void InsertIntoArchive(
const std::string& relativePath, const char* data, std::size_t size) override
{
this->RenderWindowArchiver->InsertIntoArchive(this->SubArchiveName(relativePath), data, size);
}
bool Contains(const std::string& relativePath) override
{
return this->RenderWindowArchiver->Contains(this->SubArchiveName(relativePath));
}
private:
vtkJSONDataSetArchiver() { this->RenderWindowArchiver = vtkArchiver::New(); }
~vtkJSONDataSetArchiver() override { this->SetRenderWindowArchiver(nullptr); }
std::string SubArchiveName(const std::string& relativePath)
{
return std::string(this->GetArchiveName()) + "/" + relativePath;
}
vtkArchiver* RenderWindowArchiver;
};
vtkStandardNewMacro(vtkJSONDataSetArchiver);
vtkCxxSetObjectMacro(vtkJSONDataSetArchiver, RenderWindowArchiver, vtkArchiver);
}
//------------------------------------------------------------------------------
vtkStandardNewMacro(vtkJSONRenderWindowExporter);
vtkCxxSetObjectMacro(vtkJSONRenderWindowExporter, Archiver, vtkArchiver);
//------------------------------------------------------------------------------
vtkJSONRenderWindowExporter::vtkJSONRenderWindowExporter()
{
this->Serializer = vtkVtkJSSceneGraphSerializer::New();
this->Archiver = vtkArchiver::New();
this->Factory = vtkVtkJSViewNodeFactory::New();
this->Factory->SetSerializer(this->Serializer);
this->CompactOutput = true;
}
//------------------------------------------------------------------------------
vtkJSONRenderWindowExporter::~vtkJSONRenderWindowExporter()
{
this->SetSerializer(nullptr);
this->SetArchiver(nullptr);
this->Factory->Delete();
}
//------------------------------------------------------------------------------
void vtkJSONRenderWindowExporter::SetSerializer(vtkVtkJSSceneGraphSerializer* args)
{
vtkDebugMacro(<< this->GetClassName() << " (" << this << "): setting Serializer to " << args);
if (this->Serializer != args)
{
vtkVtkJSSceneGraphSerializer* tempSGMacroVar = this->Serializer;
this->Serializer = args;
if (this->Serializer != nullptr)
{
this->Serializer->Register(this);
}
if (tempSGMacroVar != nullptr)
{
tempSGMacroVar->UnRegister(this);
}
this->Factory->SetSerializer(this->Serializer);
this->Modified();
}
}
//------------------------------------------------------------------------------
void vtkJSONRenderWindowExporter::WriteData()
{
if (this->GetSerializer() == nullptr)
{
vtkErrorMacro(<< "No scene!");
return;
}
this->GetSerializer()->Reset();
if (this->GetArchiver() == nullptr)
{
vtkErrorMacro(<< "No archiver!");
return;
}
if (this->GetArchiver()->GetArchiveName() == nullptr)
{
vtkErrorMacro(<< "Please specify Archive Name to use");
return;
}
// Populate the scene instance
{
// Construct a top-level node for the render window
vtkViewNode* vn = this->Factory->CreateNode(this->RenderWindow);
// Build the scene graph
vn->Traverse(vtkViewNode::build);
// Construct the vtk-js representation of the scene graph
vn->Traverse(vtkViewNode::synchronize);
// Update the datasets associated with the scene graph
vn->Traverse(vtkViewNode::render);
// Delete the top level node
vn->Delete();
}
// Open the archive for writing
this->GetArchiver()->OpenArchive();
// Write the top-level index file describing the scene elements and their
// topology.
{
std::stringstream stream;
Json::StreamWriterBuilder builder;
builder["commentStyle"] = "None";
builder["indentation"] = this->CompactOutput ? "" : " ";
std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
writer->write(this->GetSerializer()->GetRoot(), &stream);
std::string index = stream.str();
this->GetArchiver()->InsertIntoArchive("index.json", index.c_str(), index.size());
}
// Write the associated data arrays into the archive
{
vtkNew<vtkJSONDataSetWriter> dsWriter;
vtkNew<vtkJSONDataSetArchiver> dsArchiver;
dsArchiver->SetRenderWindowArchiver(this->GetArchiver());
dsWriter->SetArchiver(dsArchiver);
dsWriter->GetArchiver()->SetArchiveName("data");
for (vtkIdType i = 0; i < this->GetSerializer()->GetNumberOfDataArrays(); ++i)
{
std::string daArchiveName = this->GetSerializer()->GetDataArrayId(i);
// Only write the array if its id (which is its hash) has not yet been
// added to the archive.
if (!dsArchiver->Contains(daArchiveName))
{
dsWriter->WriteArrayContents(this->GetSerializer()->GetDataArray(i), daArchiveName.c_str());
}
}
}
// Close the archive
this->GetArchiver()->CloseArchive();
}
//------------------------------------------------------------------------------
void vtkJSONRenderWindowExporter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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