Description cmeadows 2003-06-01 21:17:53 EDT

It would be great if java2d's BufferedImage storage mechanism DataBuffer and 
SWT's ImageData could share the same data array.
Java2d allows for very high performance of image bit manipulation by allow 
direct access to the data array.  If this could be shared with SWT, this would 
be a very nice enhancement.

This is an example of using java2d data directly.
Using this I have direct access to the data array, since I create
it myself.  I would like to be able to pass this to something like
SWT ImageData constructor, and have it use the same array in the same manner.
Java2d will represent any changes directly to the array, but in SWT, I need to 
create a new Image object with the ImageData for each refresh, which incurrs 
a lot of overhead for bit manipulation.


      size = width * height ;
      data = new int[size] ;
      
      DataBufferInt dataBuffer = new DataBufferInt(data, size) ;
      ColorModel colorModel = null ;     
      colorModel = new DirectColorModel(24,
                                           0x00ff0000,   // Red
                                           0x0000ff00,   // Green
                                           0x000000ff,   // Blue
                                           0x0           // Alpha
                                           );         
      
      SampleModel sampleModel = colorModel.createCompatibleSampleModel( width , 
height ) ;
      WritableRaster raster = Raster.createWritableRaster(sampleModel, 
dataBuffer, new Point()) ;
      image = new BufferedImage(colorModel, raster, false, null ) ;  

I can draw on this buffered image using any of the java2d api, or manipulate the
data array myself for the most performant renderings.