SLAssimpIOStream Class Reference

Adapts a single SLIOStream to the stream interface Assimp expects. More...

#include <SLAssimpIOSystem.h>

Inherits Assimp::IOStream.

Public Member Functions
	SLAssimpIOStream (SLIOStream *stream)
size_t	Read (void *pvBuffer, size_t pSize, size_t pCount) override
	Reads pCount records of pSize bytes into pvBuffer, returns records read. More...
size_t	Write (const void *pvBuffer, size_t pSize, size_t pCount) override
	Writes pCount records of pSize bytes from pvBuffer, returns bytes written. More...
aiReturn	Seek (size_t pOffset, aiOrigin pOrigin) override
	Moves the read position to pOffset relative to pOrigin. More...
size_t	Tell () const override
	Returns the current read position in bytes. More...
size_t	FileSize () const override
	Returns the total size of the stream in bytes. More...
void	Flush () override
	Flushes the wrapped stream. More...
SLIOStream *	stream ()
	Returns the wrapped SLProject stream. More...

Private Attributes
SLIOStream *	_stream
	Wrapped SLProject stream, not owned. More...

Detailed Description

Adapts a single SLIOStream to the stream interface Assimp expects.

Assimp reads model files through its own Assimp::IOStream abstraction. This class forwards each of those calls to an SLIOStream, so that Assimp reads through the same storage layer as the rest of SLProject. That matters on Emscripten in particular, where an asset is not a file on disk but data fetched over the network or held in browser storage.

Definition at line 25 of file SLAssimpIOSystem.h.

Constructor & Destructor Documentation

SLAssimpIOStream()

SLAssimpIOStream::SLAssimpIOStream

(

SLIOStream *

stream

)

Parameters

stream

Stream to read from; ownership stays with the caller

Definition at line 13 of file SLAssimpIOSystem.cpp.

  : _stream(stream)
{
}

Member Function Documentation

FileSize()

size_t SLAssimpIOStream::FileSize ( ) const

override

Returns the total size of the stream in bytes.

Definition at line 52 of file SLAssimpIOSystem.cpp.

{
    return _stream->size();
}

Flush()

void SLAssimpIOStream::Flush ( )

override

Flushes the wrapped stream.

Definition at line 57 of file SLAssimpIOSystem.cpp.

{
    _stream->flush();
}

Read()

size_t SLAssimpIOStream::Read ( void *  pvBuffer, size_t  pSize, size_t  pCount  )

override

Reads pCount records of pSize bytes into pvBuffer, returns records read.

Definition at line 18 of file SLAssimpIOSystem.cpp.

{
    char*  dest      = (char*)pvBuffer;
    size_t totalSize = pCount * pSize;
    size_t sizeRead  = _stream->read(dest, totalSize);
    return sizeRead / pSize;
}

Seek()

aiReturn SLAssimpIOStream::Seek ( size_t  pOffset, aiOrigin  pOrigin  )

override

Moves the read position to pOffset relative to pOrigin.

Definition at line 33 of file SLAssimpIOSystem.cpp.

{
    SLIOStream::Origin streamOrigin = SLIOStream::IOO_beg;
    if (pOrigin == aiOrigin_SET)
        streamOrigin = SLIOStream::IOO_beg;
    else if (pOrigin == aiOrigin_CUR)
        streamOrigin = SLIOStream::IOO_cur;
    else if (pOrigin == aiOrigin_END)
        streamOrigin = SLIOStream::IOO_end;
 
    bool successful = _stream->seek(pOffset, streamOrigin);
    return successful ? aiReturn_SUCCESS : aiReturn_FAILURE;
}

stream()

SLIOStream* SLAssimpIOStream::stream ( )

inline

Returns the wrapped SLProject stream.

Definition at line 50 of file SLAssimpIOSystem.h.

{ return _stream; }

Tell()

size_t SLAssimpIOStream::Tell ( ) const

override

Returns the current read position in bytes.

Definition at line 47 of file SLAssimpIOSystem.cpp.

{
    return _stream->tell();
}

Write()

size_t SLAssimpIOStream::Write ( const void *  pvBuffer, size_t  pSize, size_t  pCount  )

override

Writes pCount records of pSize bytes from pvBuffer, returns bytes written.

Definition at line 26 of file SLAssimpIOSystem.cpp.

{
    const char* dest      = (const char*)pvBuffer;
    size_t      totalSize = pCount * pSize;
    return _stream->write(dest, totalSize);
}

Member Data Documentation

_stream

SLIOStream* SLAssimpIOStream::_stream

private

Wrapped SLProject stream, not owned.

Definition at line 53 of file SLAssimpIOSystem.h.

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The documentation for this class was generated from the following files:

• SLAssimpIOSystem.h
• SLAssimpIOSystem.cpp