Name: lm153972 Date: 09/27/2004


The specification for
public SampleModel(int dataType, int w, int h, int numBands) says:
"java.lang.IllegalArgumentException - if the product of w and h is greater than Integer.MAX_VALUE"
However this exception is thrown when w*h = Integer.MAX_VALUE or when
w*h is less than Intger.MAX_VALUE but difference is very small. For example
w*h = Integer.MAX_VALUE - 1.

See next example:
(SampleModel is abstract class so createCompatibleSampleModel from PackedColorModel
is used. But the exception was thrown in SampleModel constructor)
------------------------------- Test.java ----------------------------------------
mport java.awt.color.*;
import java.awt.image.*;
import java.awt.*;

class MyPackedColorModel extends PackedColorModel {
     public MyPackedColorModel(ColorSpace space, int bits, int[] colorMaskArray,
             int alphaMask, boolean isAlphaPremultiplied, int trans,
             int transferType) {
         super(space, bits, colorMaskArray, alphaMask, isAlphaPremultiplied,
                 trans, transferType);
     }
     public MyPackedColorModel(ColorSpace space, int bits, int rmask, int gmask,
             int bmask, int amask, boolean isAlphaPremultiplied, int trans,
             int transferType) {
         super(space, bits, rmask, gmask, bmask, amask, isAlphaPremultiplied,
             trans, transferType);
     }
     public int getAlpha(int pixel) {
         return 0;
     }
     public int getRed(int pixel) {
         return 0;
     }
     public int getGreen(int pixel) {
         return 0;
     }
     public int getBlue(int pixel) {
         return 0;
     }
}

public class Test {
     public static void main(String[] a) {
         ColorSpace colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
         int[] colorMaskArray = { 0x00ff0000, 0x0000ff00, 0x000000ff};
         int bits = 32;
         int alphaMask = 0xff000000;
         MyPackedColorModel model = new MyPackedColorModel(colorSpace,bits,
                 colorMaskArray, alphaMask, false, 1, java.awt.image.DataBuffer.TYPE_USHORT);
         SampleModel sm = model.createCompatibleSampleModel(1,Integer.MAX_VALUE - 1);

     }

}
--------------------------------- Output -------------------------------------

Exception in thread "main" java.lang.IllegalArgumentException: Dimensions (width=1 height=2147483646) are too large
         at java.awt.image.SampleModel.<init>(SampleModel.java:112)
         at java.awt.image.SinglePixelPackedSampleModel.<init>(SinglePixelPackedSampleModel.java:124)
         at java.awt.image.SinglePixelPackedSampleModel.<init>(SinglePixelPackedSampleModel.java:91)
         at java.awt.image.PackedColorModel.createCompatibleSampleModel(PackedColorModel.java:293)
         at Test.main(Test.java:40)



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