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itkWasmImageIO.h
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itkWasmImageIO.h
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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkWasmImageIO_h
#define itkWasmImageIO_h
#include "WebAssemblyInterfaceExport.h"
#include "itkStreamingImageIOBase.h"
#include <fstream>
#include "rapidjson/document.h"
namespace itk
{
/** \class WasmImageIO
*
* \brief Read and write an itk::Image in a web-friendly format.
*
* This format is intended to facilitate data exchange in itk-wasm.
* It reads and writes an itk-wasm Image object in a CbOR file on the
* filesystem with JSON files and binary files for TypedArrays.
*
* The file extensions used are .iwi and .iwi.cbor.
*
* \ingroup IOFilters
* \ingroup WebAssemblyInterface
*/
class WebAssemblyInterface_EXPORT WasmImageIO: public StreamingImageIOBase
{
public:
/** Standard class typedefs. */
typedef WasmImageIO Self;
typedef StreamingImageIOBase Superclass;
typedef SmartPointer< Self > Pointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(WasmImageIO, StreamingImageIOBase);
/** The different types of ImageIO's can support data of varying
* dimensionality. For example, some file formats are strictly 2D
* while others can support 2D, 3D, or even n-D. This method returns
* true/false as to whether the ImageIO can support the dimension
* indicated. */
bool SupportsDimension(unsigned long) override;
/** Determine the file type. Returns true if this ImageIO can read the
* file specified. */
bool CanReadFile(const char *) override;
/** Set the spacing and dimension information for the set filename. */
void ReadImageInformation() override;
/** Reads the data from disk into the memory buffer provided. */
void Read(void *buffer) override;
#if !defined(ITK_WRAPPING_PARSER)
/** Set the JSON representation of the image information. */
void SetJSON(rapidjson::Document & json);
#endif
/** Determine the file type. Returns true if this ImageIO can write the
* file specified. */
bool CanWriteFile(const char *) override;
/** Set the spacing and dimension information for the set filename. */
void WriteImageInformation() override;
#if !defined(ITK_WRAPPING_PARSER)
/** Get the JSON representation of the image information. */
rapidjson::Document GetJSON();
#endif
/** Writes the data to disk from the memory buffer provided. Make sure
* that the IORegions has been set properly. */
void Write(const void *buffer) override;
protected:
WasmImageIO();
~WasmImageIO() override;
void PrintSelf(std::ostream & os, Indent indent) const override;
Superclass::SizeType GetHeaderSize() const override
{
return 0;
}
void ReadCBOR(void * buffer = nullptr, unsigned char * cborBuffer = nullptr, size_t cborBufferLength = 0);
size_t WriteCBOR(const void * buffer = nullptr, unsigned char ** cborBuffer = nullptr, bool allocateCBORBuffer = false);
private:
ITK_DISALLOW_COPY_AND_ASSIGN(WasmImageIO);
};
} // end namespace itk
#endif // itkWasmImageIO_h