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/*=========================================================================
Program: Visualization Toolkit
Module: vtkJSONDataSetWriter.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/**
* @class vtkJSONDataSetWriter
* @brief write vtkDataSet using a vtkArchiver with a JSON meta file along
* with all the binary arrays written as standalone binary files.
* The generated format can be used by vtk.js using the reader below
* https://kitware.github.io/vtk-js/examples/HttpDataSetReader.html
*
* vtkJSONDataSetWriter writes vtkImageData / vtkPolyData into a set of files
* representing each arrays that compose the dataset along with a JSON meta file
* that describe what they are and how they should be assembled into an actual
* vtkDataSet.
*
*
* @warning
* This writer assume LittleEndian by default. Additional work should be done to
* properly
* handle endianness.
*
*
* @sa
* vtkArchiver
*/
#ifndef vtkJSONDataSetWriter_h
#define vtkJSONDataSetWriter_h
#include "vtkIOExportModule.h" // For export macro
#include "vtkWriter.h"
#include <string> // std::string used as parameters in a few methods
VTK_ABI_NAMESPACE_BEGIN
class vtkDataSet;
class vtkDataArray;
class vtkDataSetAttributes;
class vtkArchiver;
class VTKIOEXPORT_EXPORT vtkJSONDataSetWriter : public vtkWriter
{
public:
using vtkWriter::Write;
///@{
/**
* Compute a MD5 digest of a void/(const unsigned char) pointer to compute a
* string hash
*/
static void ComputeMD5(const unsigned char* content, int size, std::string& hash);
///@}
///@{
/**
* Compute the target JavaScript typed array name for the given vtkDataArray
* (Uin8, Uint16, Uin32, Int8, Int16, Int32, Float32, Float64) or
* "xxx" if no match found
*
* Since Uint64 and Int64 does not exist in JavaScript, the needConversion
* argument will be set to true and Uint32/Int32 will be returned instead.
*/
static std::string GetShortType(vtkDataArray* input, bool& needConversion);
///@}
///@{
/**
* Return a Unique identifier for that array
* (i.e.: Float32_356_13f880891af7b77262c49cae09a41e28 )
*/
static std::string GetUID(vtkDataArray*, bool& needConversion);
///@}
///@{
/**
* Return a Unique identifier for any invalid string
*/
std::string GetValidString(const char*);
///@}
///@{
/**
* Write the contents of the vtkDataArray to disk based on the filePath
* provided without any extra information. Just the raw data will be
* written.
*
* If vtkDataArray is a Uint64 or Int64, the data will be converted
* to Uint32 or Int32 before being written.
*/
bool WriteArrayContents(vtkDataArray*, VTK_FILEPATH const char* relativeFilePath);
///@}
///@{
/**
* For backwards compatibility, this static method writes a data array's
* contents directly to a file.
*/
static bool WriteArrayAsRAW(vtkDataArray*, VTK_FILEPATH const char* filePath);
///@}
static vtkJSONDataSetWriter* New();
vtkTypeMacro(vtkJSONDataSetWriter, vtkWriter);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Get the input to this writer.
*/
vtkDataSet* GetInput();
vtkDataSet* GetInput(int port);
///@}
///@{
/**
* Specify the Scene Archiver object
*/
virtual void SetArchiver(vtkArchiver*);
vtkGetObjectMacro(Archiver, vtkArchiver);
///@}
void Write(vtkDataSet*);
bool IsDataSetValid() { return this->ValidDataSet; }
protected:
vtkJSONDataSetWriter();
~vtkJSONDataSetWriter() override;
void WriteData() final;
std::string WriteArray(vtkDataArray*, const char* className, const char* arrayName = nullptr);
std::string WriteDataSetAttributes(vtkDataSetAttributes* fields, const char* className);
vtkArchiver* Archiver;
bool ValidDataSet;
int ValidStringCount;
int FillInputPortInformation(int port, vtkInformation* info) override;
private:
vtkJSONDataSetWriter(const vtkJSONDataSetWriter&) = delete;
void operator=(const vtkJSONDataSetWriter&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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