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> Date: Wed, 4 Oct 2000 14:26:25 -0500
> From: Ted Hill <[EMAIL PROTECTED]>
> Subject: [JAVA2D] DataBuffer question
> To: [EMAIL PROTECTED]
>
> Hello,
>
> I'm trying to create a BufferedImage from a 2D int array as follows:
>
> ====================================================
> int width = 256;
> int height = 256;
>
> int [ ][ ] myData = new int[width][height];
>
> /*
> load values into myData
> */
>
> rgbImage = new BufferedImage(width, height,
> BufferedImage.TYPE_INT_RGB);
>
> WritableRaster wr = rgbImage.getRaster( );
>
> DataBuffer db = new DataBufferInt(myData, myData.length);
>
> wr.setDataElements(width, height, db);
The method, setDataElements, is used to set the x,y value of a pixel in
the raster. If you want to set the entire image, you might want to do:
wr.setDataElements(0, 0, width, height, myData);
To get rid of copying the data, you could do:
DataBuffer db = newDataBufferInt(myData, myData.length);
int[] bandMasks = new int[3];
bandMasks[0] = 0xff0000; // red
bandMasks[1] = 0x00ff00; // green
bandMasks[2] = 0x000000; // blue
WritableRaster wr = Raster.createPackedRaster(db, width, height,
width, bandMasks, null);
ColorModel cm = new DirectColorModel(24,
0x00ff0000, // Red
0x0000ff00, // Green
0x000000ff, // Blue
0x0 // Alpha
);
rgbImage = new BufferedImage(cm, wr, false, null);
jeannette
> ====================================================
>
> the last line throws an exception:
>
> java.lang.ClassCastException: java.awt.image.DataBufferInt
> at
> sun.awt.image.IntegerInterleavedRaster.setDataElements(IntegerInterleavedRas
> ter.java:269)
>
> Can some one help me? How do I feed a 2D int array to a BufferedImage?
>
> Ted Hill
> Software Engineer
> Tomotherapy
> [EMAIL PROTECTED]
>
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