Name: vrR10176 Date: 03/23/2001



Api docs says about method
javax.imageio.ImageReadParam.getSourceMaxProgressivePass():

"public int getSourceMaxProgressivePass()
  If getSourceNumProgressivePasses is equal to Integer.MAX_VALUE, returns
Integer.MAX_VALUE. Otherwise, returns
getSourceMinProgressivePass() + getSourceNumProgressivePasses() - 1.
  Returns:
    the index of the last pass to be read, or Integer.MAX_VALUE."

The index of the progressive pass that will be decoded may not be
negative, furthemore getSourceMaxProgressivePass() should return
value greater than or equal to getSourceMinProgressivePass().

But specification does not describe method behavior if
minProgressivePass+numProgressivePasses-1 is greater then
Integer.MAX_VALUE (except when numProgressivePasses is equal
to Integer.MAX_VALUE).

For example, if minProgressivePass and numProgressivePasses
are set by setSourceProgressivePasses() to Integer.MAX_VALUE-1
the method getSourceMaxProgressivePass() returns -5.

To reproduce the issue execute following test.
------------ test.java ------------------------
import javax.imageio.ImageReadParam;

public class test{
public static void main(String[] argv) {

ImageReadParam image_read_param = new ImageReadParam();
image_read_param.setSourceProgressivePasses(Integer.MAX_VALUE -1 , Integer.MAX_VALUE -1);

System.out.println("getSourceMaxProgressivePass() returns: " + image_read_param.getSourceMaxProgressivePass());

}
}
------------ Logs -----------------------------
$ java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b56)
Java HotSpot(TM) Client VM (build 1.4-beta-B56, mixed mode)

$ javac test.java

$ java test
getSourceMaxProgressivePass() returns: -5

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