/**
* This will return a list of alternate color spaces(PDColorSpace) if the display application does
* not support this icc stream.
*
* @return A list of alternate color spaces.
* @throws IOException If there is an error getting the alternate color spaces.
*/
public List getAlternateColorSpaces() throws IOException {
COSBase alternate = stream.getDictionaryObject(COSName.getPDFName("Alternate"));
COSArray alternateArray = null;
if (alternate == null) {
alternateArray = new COSArray();
int numComponents = getNumberOfComponents();
String csName = null;
if (numComponents == 1) {
csName = PDDeviceGray.NAME;
} else if (numComponents == 3) {
csName = PDDeviceRGB.NAME;
} else if (numComponents == 4) {
csName = PDDeviceCMYK.NAME;
} else {
throw new IOException("Unknown colorspace number of components:" + numComponents);
}
alternateArray.add(COSName.getPDFName(csName));
} else {
if (alternate instanceof COSArray) {
alternateArray = (COSArray) alternate;
} else if (alternate instanceof COSName) {
alternateArray = new COSArray();
alternateArray.add(alternate);
} else {
throw new IOException(
"Error: expected COSArray or COSName and not " + alternate.getClass().getName());
}
}
List retval = new ArrayList();
for (int i = 0; i < alternateArray.size(); i++) {
retval.add(PDColorSpaceFactory.createColorSpace((COSName) alternateArray.get(i)));
}
return new COSArrayList(retval, alternateArray);
}
/**
* This will get the alternate color space for this separation.
*
* @return The alternate color space.
* @throws IOException If there is an error getting the alternate color space.
*/
public PDColorSpace getAlternateColorSpace() throws IOException {
COSBase alternate = array.getObject(2);
PDColorSpace cs = PDColorSpaceFactory.createColorSpace(alternate);
// logger().info("Returning " + cs.toString() + " for input " + alternate.toString());
return cs;
}
/**
* This will get the color space that acts as the index for this color space.
*
* @return The base color space.
* @throws IOException If there is error creating the base color space.
*/
public PDColorSpace getBaseColorSpace() throws IOException {
PDColorSpace retval = null;
COSBase base = array.getObject(1);
if (base instanceof COSName) {
retval = PDColorSpaceFactory.createColorSpace((COSName) base);
} else {
throw new IOException("Error:unknown base colorspace");
}
return retval;
}