imagecomponentstate.java

JAVA3D矩陈的相关类

        encoder.encode( image );
        byteStream.close();
        
        byte[] buffer = byteStream.toByteArray();
        out.writeInt( buffer.length );
        out.write( buffer );
    }
    
    protected BufferedImage readBufferedImage( DataInput in ) throws IOException {
        byte compression = in.readByte();
        
        if (compression==NO_COMPRESSION)
            return readBufferedImageNoCompression( in );
        else if (compression==GZIP_COMPRESSION)
            return readBufferedImageGzipCompression( in );
        else if (compression==JPEG_COMPRESSION)
            return readBufferedImageJpegCompression( in );
	throw new SGIORuntimeException("Unknown Image Compression");
    }
        
    private BufferedImage readBufferedImageNoCompression( DataInput in ) throws IOException {  
        int size = in.readInt();
        byte[] buffer = new byte[ size ];
        in.readFully( buffer );
        ByteArrayInputStream byteIn = new ByteArrayInputStream( buffer );
        DataInputStream dataIn = new DataInputStream( byteIn );
        
        ColorModel colorModel = readColorModel( dataIn );
        WritableRaster raster = readWritableRaster( dataIn );
        boolean alphaPreMult = dataIn.readBoolean();
        dataIn.close();
        
        return new BufferedImage( colorModel, raster, alphaPreMult, null );
    }
    
    private BufferedImage readBufferedImageGzipCompression( DataInput in ) throws IOException {  
        int size = in.readInt();
        byte[] buffer = new byte[ size ];
        in.readFully( buffer );
        ByteArrayInputStream byteIn = new ByteArrayInputStream( buffer );
        GZIPInputStream gzipIn = new GZIPInputStream( byteIn );
        DataInputStream dataIn = new DataInputStream( gzipIn );
        
        ColorModel colorModel = readColorModel( dataIn );
        WritableRaster raster = readWritableRaster( dataIn );
        boolean alphaPremult = dataIn.readBoolean();
        dataIn.close();
        
        return new BufferedImage( colorModel, raster, alphaPremult, null );
    }
    
    private BufferedImage readBufferedImageJpegCompression( DataInput in ) throws IOException {  
        int size = in.readInt();
        byte[] buffer = new byte[ size ];
        in.readFully( buffer );
        ByteArrayInputStream byteStream = new ByteArrayInputStream( buffer );
        
        JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder( byteStream );
        byteStream.close();
        
        return decoder.decodeAsBufferedImage();
    }
    
    private void writeColorModel( DataOutput out, ColorModel colorModel ) throws IOException {
        if (colorModel instanceof DirectColorModel) {
            out.writeInt( DIRECT_COLOR_MODEL );
            writeDirectColorModel( out, (DirectColorModel)colorModel );
        } 
        else
            throw new SGIORuntimeException("Unsupported ColorModel "+colorModel.getClass().getName() );
    }
    
    private ColorModel readColorModel( DataInput in ) throws IOException {
        switch( in.readInt() ) {
            case DIRECT_COLOR_MODEL:
                return readDirectColorModel( in );
        }
        
        throw new SGIORuntimeException( "Invalid ColorModel - File corrupt" );
    }

    private void writeDirectColorModel( DataOutput out,
					DirectColorModel colorModel ) throws IOException {
        out.writeInt( colorModel.getPixelSize() );
        out.writeInt( colorModel.getRedMask() );
        out.writeInt( colorModel.getGreenMask() );
        out.writeInt( colorModel.getBlueMask() );
        out.writeInt( colorModel.getAlphaMask() );
    }
    
    private DirectColorModel readDirectColorModel( DataInput in ) throws IOException {
        return new DirectColorModel( in.readInt(),
                                     in.readInt(),
                                     in.readInt(),
                                     in.readInt(),
                                     in.readInt() );
    }
    
    private void writeWritableRaster( DataOutput out, WritableRaster raster ) throws IOException{
        writeSampleModel( out, raster.getSampleModel() );
        writeDataBuffer( out, raster.getDataBuffer() );
        Point origin = new Point();
        // TODO Get the origin of the raster - seems to be missing from the raster API
        out.writeInt( origin.x );
        out.writeInt( origin.y );
    }
    
    private WritableRaster readWritableRaster( DataInput in ) throws IOException {
        return Raster.createWritableRaster( readSampleModel( in ),
                                   readDataBuffer( in ),
                                   new Point( in.readInt(), in.readInt() ));
    }
    
    private void writeSampleModel( DataOutput out, SampleModel model ) throws IOException {
        if (model instanceof SinglePixelPackedSampleModel) {
            out.writeInt( SINGLE_PIXEL_PACKED_SAMPLE_MODEL );
            writeSinglePixelPackedSampleModel( out, (SinglePixelPackedSampleModel)model );
        } else
            throw new SGIORuntimeException("Unsupported SampleModel "+model.getClass().getName() );
    }
    
    private SampleModel readSampleModel( DataInput in ) throws IOException {
        switch( in.readInt() ) {
            case SINGLE_PIXEL_PACKED_SAMPLE_MODEL:
                return readSinglePixelPackedSampleModel( in );
        }
        
        throw new SGIORuntimeException("Invalid SampleModel - file corrupt");
    }
    
    private void writeSinglePixelPackedSampleModel( DataOutput out,
        SinglePixelPackedSampleModel model ) throws IOException {

        int[] masks = model.getBitMasks();
        out.writeInt( masks.length );
        for(int i=0; i<masks.length; i++)
            out.writeInt( masks[i] );
        
        out.writeInt( model.getDataType() );
        out.writeInt( model.getWidth() );
        out.writeInt( model.getHeight() );
        out.writeInt( model.getScanlineStride() );
        
    }
    
    private SinglePixelPackedSampleModel readSinglePixelPackedSampleModel( DataInput in )
	throws IOException {

        int masks[] = new int[ in.readInt() ];
        for(int i=0; i<masks.length; i++)
            masks[i] = in.readInt();
        
        return new SinglePixelPackedSampleModel( in.readInt(),
                                                 in.readInt(),
                                                 in.readInt(),
                                                 in.readInt(),
                                                 masks );
    }
    
    private void writeDataBuffer( DataOutput out, DataBuffer buffer ) throws IOException {
        if (buffer instanceof DataBufferInt) {
            out.writeInt( DATA_BUFFER_INT );
            writeDataBufferInt( out, (DataBufferInt)buffer );
        } else
            throw new SGIORuntimeException("Unsupported DataBuffer "+buffer.getClass().getName() );
    }
    
    private DataBuffer readDataBuffer( DataInput in ) throws IOException {
        switch( in.readInt() ) {
            case DATA_BUFFER_INT:
                return readDataBufferInt( in );
        }
        
        throw new SGIORuntimeException("Incorrect DataBuffer - file corrupt");
    }
    
    private void writeDataBufferInt( DataOutput out, DataBufferInt buffer ) throws IOException {
        int[][] data = buffer.getBankData();
        out.writeInt( data.length );
        for(int i=0; i<data.length; i++) {
            out.writeInt( data[i].length );
            for( int j=0; j<data[i].length; j++)
                out.writeInt( data[i][j] );
        }
        
        out.writeInt( buffer.getSize() );
        
        // TODO Handle DataBufferInt offsets
            
    }
    
    private DataBufferInt readDataBufferInt( DataInput in ) throws IOException {
        int[][] data = new int[in.readInt()][];
        for(int i=0; i<data.length; i++) {
            data[i] = new int[ in.readInt() ];
            for( int j=0; j<data[i].length; j++)
                data[i][j] = in.readInt();
        }
        
        
        return new DataBufferInt( data, in.readInt() );
    }
}