Error when creating BufferedImage with IndexColorModel from a byte array.

Question

Hi, I have a 1-dimentional byte array and an IndexColorTable, and I can't figure out how to combine the 2 into an BufferedImage without unnecessary copying/reallocating of the image buffer.
The color model I have is:
int [] cmap = new int [numColors];
cmap[i++] = 0xffa0f000;  /etc.
new IndexColorModel(8, 22, cmap, 0, true,  transparentIndex,  DataBuffer.TYPE_BYTE );Thanks for your help
-Ben
Ps.
I've was looking at some example code (http://javaalmanac.com/egs/java.awt.image/Mandelbrot2.html?l=rel), and can't figure out how to go from the color model they're using to the one I have (the 8 bit one specified above). When I replace the 4bit colormodel in the code below with the 8bit color model specified above, I get the following error:
[java] java.lang.IllegalArgumentException: Raster ByteInterleavedRaster: width = 5120 height = 3520 #numDataElements 1 dataOff[0] = 0 is incompatible with ColorModel IndexColorModel: #pixelBits = 8 numComponents = 4 color space = java.awt.color.ICC_ColorSpace@c51355 transparency = 2 transIndex = 22 has alpha = true isAlphaPre = false
[java] at java.awt.image.BufferedImage.<init>(BufferedImage.java:613)
Code:
byte[] pixelArray = (byte[]) getData_CHAR();                
int width = 5120;
int height = 3520;
int numbytes = width*height;
//create DataBuffer using byte buffer of pixel data.
DataBuffer dataBuffer = new DataBufferByte(pixelArray, numbytes, 0);
//prepare a sample model that specifies a storage 8-bits of pixel data in an 8-bit data element
int bitMasks[] = new int[]{0xf};
SinglePixelPackedSampleModel sampleModel = new SinglePixelPackedSampleModel(DataBuffer.TYPE_BYTE, width, height, bitMasks);
//create a raster using the sample model and data buffer
WritableRaster writableRaster = Raster.createWritableRaster(sampleModel, dataBuffer, new Point(0,0));
//generate 16-color model
byte[] r = new byte[16];
byte[] g = new byte[16];
byte[] b = new byte[16];
r[0] = 0; g[0] = 0; b[0] = 0;
r[1] = 0; g[1] = 0; b[1] = (byte)192;
r[2] = 0; g[2] = 0; b[2] = (byte)255;
r[3] = 0; g[3] = (byte)192; b[3] = 0;
r[4] = 0; g[4] = (byte)255; b[4] = 0;
r[5] = 0; g[5] = (byte)192; b[5] = (byte)192;
r[6] = 0; g[6] = (byte)255; b[6] = (byte)255;
r[7] = (byte)192; g[7] = 0; b[7] = 0;
r[8] = (byte)255; g[8] = 0; b[8] = 0;
r[9] = (byte)192; g[9] = 0; b[9] = (byte)192;
r[10] = (byte)255; g[10] = 0; b[10] = (byte)255;
r[11] = (byte)192; g[11] = (byte)192; b[11] = 0;
r[12] = (byte)255; g[12] = (byte)255; b[12] = 0;
r[13] = (byte)80; g[13] = (byte)80; b[13] = (byte)80;
r[14] = (byte)192; g[14] = (byte)192; b[14] = (byte)192;
r[15] = (byte)255; g[15] = (byte)255; b[15] = (byte)255;
//create buffered image    
ColorModel colorModel = new IndexColorModel(4, 16, r, g, b);
BufferedImage image = new BufferedImage(colorModel, writableRaster, false, null);Message was edited by:
ben_weisburd
Message was edited by:
ben_weisburd

Answer 1

I had the same problem too.
anyone found the solution for this problem?
thanks
Bruno Rabino
When I try to make a MD-form, where the base-table for the detail contains a column with a BLOB-datatype. I get following error when I finish creation of the form.
Error: Exception from wwv_generate_component.build_procedure (WWV-01821)
Error creating module: ORA-01403: no data found (WWV-16042)
When I use the table with the BLOB as master or in a form, it works fine.
Has anyone else experienced this problem? Or knows a way to fix or work around it. Thanks in advance.
Portal version: 3.0.6.6.5
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