// static
bool PortableFloatMapIO::write( const std::string& filename, Array2DReadView< Vector4f > image )
{
int w = image.width();
int h = image.height();
// use "wb" binary mode to ensure that on Windows,
// newlines in the header are written out as '\n'
FILE* pFile = fopen( filename.c_str(), "wb" );
if( pFile == nullptr )
{
return false;
}
// write header
int nCharsWritten = fprintf( pFile, "PF4\n%d %d\n-1\n", w, h );
if( nCharsWritten < 0 )
{
fclose( pFile );
return false;
}
// All at once.
if( image.packed() )
{
fwrite( image.rowPointer( 0 ), sizeof( Vector4f ), image.numElements(), pFile );
}
// Row by Row.
else if( image.elementsArePacked() )
{
for( int y = 0; y < h; ++y )
{
fwrite( image.rowPointer( y ), sizeof( Vector4f ), image.width(), pFile );
}
}
// Element by element.
else
{
for( int y = 0; y < h; ++y )
{
for( int x = 0; x < w; ++x )
{
fwrite( image.elementPointer( { x, y } ), sizeof( Vector4f ), 1, pFile );
}
}
}
fclose( pFile );
return true;
}
