How to convert array of bytes into Image in Java SE

Question

What is the right way to convert raw array of bytes into Image in Java SE. array consist of bytes, where each three bytes represent one pixel, with each byte for corresponding RGB component.

Can anybody suggest a code sample?

Thanks, Mike

Answer 1

You can do it using Raster class. It's better because it does not require iterating and copying of byte arrays.

 byte[] raw = new byte[width*height*3]; // raw bytes of our image
 DataBuffer buffer = new DataBufferByte(raw, raw.length);

 //The most difficult part of awt api for me to learn
 SampleModel sampleModel = new ComponentSampleModel(DataBuffer.TYPE_BYTE, width, height, 3, width*3, new int[]{2,1,0});

 Raster raster = Raster.createRaster(sampleModel, buffer, null);

 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
 image.setData(raster);