Method loadStream

src/cinder/ImageSourceFileRadiance.cpp:71–128

}

void ImageSourceFileRadiance::loadStream( IStreamRef stream )
{
	setDataType( ImageIo::FLOAT32 );
	setColorModel( ImageIo::CM_RGB );
	setChannelOrder( ImageIo::RGB );

	char str[200];
	stream->readData( str, 10 );
	if (memcmp(str, "#?RADIANCE", 10)) {
		// check RBGE
		if (memcmp(str, "#?RGBE", 6)) {
			throw ImageSourceFileRadianceException("Invalid header");
		}
		else {
			// move back the stream and continue parsing
			stream->seekRelative(-4);
		}
	}

	stream->seekRelative( 1 );

	char cmd[200];
	int i = 0;
	char c = 0, oldc;
	while( true ) {
		oldc = c;
		stream->read( &c );
		if( c == 0xa && oldc == 0xa )
			break;
		cmd[i++] = c;
	}

	char resolution[200];
	i = 0;
	while( true ) {
		stream->read( &c );
		resolution[i++] = c;
		if( c == 0xa )
			break;
	}

	int width, height;
	if( ! sscanf( resolution, "-Y %d +X %d", &height, &width ) )
		throw ImageSourceFileRadianceException( "Unable to parse size" );
	setSize( width, height );

	mRgbData = std::unique_ptr<float[]>( new float[width * height * 3] );
	std::unique_ptr<RgbePixel[]> scanline( new RgbePixel[width] );

	// convert image
	float *cols = mRgbData.get();
	for( int y = height - 1; y >= 0; y-- ) {
		if( ! decrunchScanline( scanline.get(), width, stream.get() ) )
			break;
		workOnRgbeScanline( scanline.get(), width, cols );
		cols += width * 3;
	}
}