| Methods Summary |
|---|
| public java.lang.Object | getContent(java.net.URLConnection uc)
int width = -1;
int height = -1;
int bitpix = 16;
int[] data = null;
int naxis = 2;
Hashtable header = null;
DataInputStream dis = new DataInputStream(uc.getInputStream());
header = readHeader(dis);
// should we return null or throw an IOException????
bitpix = getIntFromHeader("BITPIX ", -1, header);
if (bitpix <= 0) return null;
naxis = getIntFromHeader("NAXIS ", -1, header);
if (naxis < 1) return null;
width = getIntFromHeader("NAXIS1 ", -1, header);
if (width <= 0) return null;
if (naxis == 1) height = 1;
else height = getIntFromHeader("NAXIS2 ", -1, header);
if (height <= 0) return null;
if (bitpix == 16) {
short[] theInput = new short[height * width];
for (int i = 0; i < theInput.length; i++) {
theInput[i] = dis.readShort();
}
data = scaleArray(theInput);
}
else if (bitpix == 32) {
int[] theInput = new int[height * width];
for (int i = 0; i < theInput.length; i++) {
theInput[i] = dis.readInt();
}
data = scaleArray(theInput);
}
else if (bitpix == 64) {
long[] theInput = new long[height * width];
for (int i = 0; i < theInput.length; i++) {
theInput[i] = dis.readLong();
}
data = scaleArray(theInput);
}
else if (bitpix == -32) {
float[] theInput = new float[height * width];
for (int i = 0; i < theInput.length; i++) {
theInput[i] = dis.readFloat();
}
data = scaleArray(theInput);
}
else if (bitpix == -64) {
double[] theInput = new double[height * width];
for (int i = 0; i < theInput.length; i++) {
theInput[i] = dis.readDouble();
}
data = scaleArray(theInput);
}
else {
System.err.println("Invalid BITPIX");
return null;
} // end if-else-if
return new MemoryImageSource(width, height, data, 0, width);
|
| private int | getIntFromHeader(java.lang.String name, int defaultValue, java.util.Hashtable header)
String s = "";
int result = defaultValue;
try {
s = (String) header.get(name);
}
catch (NullPointerException e) {
return defaultValue;
}
try {
result = Integer.parseInt(s.trim());
}
catch (NumberFormatException e) {
System.err.println(e);
System.err.println(s);
return defaultValue;
}
return result;
|
| private java.util.Hashtable | readHeader(java.io.DataInputStream dis)
int blocksize = 2880;
int fieldsize = 80;
String key, value;
int linesRead = 0;
byte[] buffer = new byte[fieldsize];
Hashtable header = new Hashtable();
while (true) {
dis.readFully(buffer);
key = new String(buffer, 0, 8, "ASCII");
linesRead++;
if (key.substring(0, 3).equals("END")) break;
if (buffer[8] != '=" || buffer[9] != ' ") continue;
value = new String(buffer, 10, 20, "ASCII");
header.put(key, value);
}
int linesLeftToRead
= (blocksize - ((linesRead * fieldsize) % blocksize))/fieldsize;
for (int i = 0; i < linesLeftToRead; i++) dis.readFully(buffer);
return header;
|
| private int[] | scaleArray(short[] theInput)
int data[] = new int[theInput.length];
int max = 0;
int min = 0;
for (int i = 0; i < theInput.length; i++) {
if (theInput[i] > max) max = theInput[i];
if (theInput[i] < min) min = theInput[i];
}
long r = max - min;
double a = 255.0/r;
double b = -a * min;
int opaque = 255;
for (int i = 0; i < data.length; i++) {
int temp = (int) (theInput[i] * a + b);
data[i] = (opaque << 24) | (temp << 16) | (temp << 8) | temp;
}
return data;
|
| private int[] | scaleArray(int[] theInput)
int data[] = new int[theInput.length];
int max = 0;
int min = 0;
for (int i = 0; i < theInput.length; i++) {
if (theInput[i] > max) max = theInput[i];
if (theInput[i] < min) min = theInput[i];
}
long r = max - min;
double a = 255.0/r;
double b = -a * min;
int opaque = 255;
for (int i = 0; i < data.length; i++) {
int temp = (int) (theInput[i] * a + b);
data[i] = (opaque << 24) | (temp << 16) | (temp << 8) | temp;
}
return data;
|
| private int[] | scaleArray(long[] theInput)
int data[] = new int[theInput.length];
long max = 0;
long min = 0;
for (int i = 0; i < theInput.length; i++) {
if (theInput[i] > max) max = theInput[i];
if (theInput[i] < min) min = theInput[i];
}
long r = max - min;
double a = 255.0/r;
double b = -a * min;
int opaque = 255;
for (int i = 0; i < data.length; i++) {
int temp = (int) (theInput[i] * a + b);
data[i] = (opaque << 24) | (temp << 16) | (temp << 8) | temp;
}
return data;
|
| private int[] | scaleArray(double[] theInput)
int data[] = new int[theInput.length];
double max = 0;
double min = 0;
for (int i = 0; i < theInput.length; i++) {
if (theInput[i] > max) max = theInput[i];
if (theInput[i] < min) min = theInput[i];
}
double r = max - min;
double a = 255.0/r;
double b = -a * min;
int opaque = 255;
for (int i = 0; i < data.length; i++) {
int temp = (int) (theInput[i] * a + b);
data[i] = (opaque << 24) | (temp << 16) | (temp << 8) | temp;
}
return data;
|
| private int[] | scaleArray(float[] theInput)
int data[] = new int[theInput.length];
float max = 0;
float min = 0;
for (int i = 0; i < theInput.length; i++) {
if (theInput[i] > max) max = theInput[i];
if (theInput[i] < min) min = theInput[i];
}
double r = max - min;
double a = 255.0/r;
double b = -a * min;
int opaque = 255;
for (int i = 0; i < data.length; i++) {
int temp = (int) (theInput[i] * a + b);
data[i] = (opaque << 24) | (temp << 16) | (temp << 8) | temp;
}
return data;
|
