/*
* Copyright 2006-2017 ICEsoft Technologies Canada Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS
* IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package org.icepdf.core.pobjects.graphics;
import org.icepdf.core.pobjects.Name;
import org.icepdf.core.pobjects.functions.Function;
import org.icepdf.core.util.Library;
import java.awt.*;
import java.util.HashMap;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* DeviceN colour spaces shall be defined in a similar way to Separation colour
* spaces-in fact, a Separationcolour space can be defined as a DeviceN colour
* space with only one component.
* <br>
* A DeviceN colour space shall be specified as follows:
* [/DeviceN names alternateSpace tintTransform]
* or
* [/DeviceN names alternateSpace tintTransform attributes]
* <br>
* It is a four- or five-element array whose first element shall be the colour
* space family name DeviceN. The remaining elements shall be parameters that a
* DeviceN colour space requires.
*/
public class DeviceN extends PColorSpace {
public static final Name DEVICEN_KEY = new Name("DeviceN");
public static final Name COLORANTS_KEY = new Name("Colorants");
List<Name> names;
PColorSpace alternate;
Function tintTransform;
ConcurrentHashMap<Object, Object> colorants = new ConcurrentHashMap<Object, Object>();
PColorSpace colorspaces[];
boolean foundCMYK;
@SuppressWarnings("unchecked")
DeviceN(Library l, HashMap h, Object o1, Object o2, Object o3, Object o4) {
super(l, h);
names = (java.util.List) o1;
alternate = getColorSpace(l, o2);
tintTransform = Function.getFunction(l, l.getObject(o3));
if (o4 != null) {
HashMap h1 = (HashMap) library.getObject(o4);
HashMap h2 = (HashMap) library.getObject(h1, COLORANTS_KEY);
if (h2 != null) {
Set e = h2.keySet();
Object oo;
for (Object o : e) {
oo = h2.get(o);
colorants.put(o, getColorSpace(library, library.getObject(oo)));
}
}
}
colorspaces = new PColorSpace[names.size()];
for (int i = 0; i < colorspaces.length; i++) {
colorspaces[i] = (PColorSpace) colorants.get(names.get(i).toString());
}
// check to see if cymk is specified int the names, if so we can
// uses the cmyk colour space directly, otherwise we fallback to the alternative
// and hope it was setup correctly.
int cmykCount = 0;
foundCMYK = true;
for (Name name : names) {
if (name.getName().toLowerCase().startsWith("c")) {
cmykCount++;
} else if (name.getName().toLowerCase().startsWith("m")) {
cmykCount++;
} else if (name.getName().toLowerCase().startsWith("y")) {
cmykCount++;
} else if (name.getName().toLowerCase().startsWith("k")) {
cmykCount++;
} else if (name.getName().toLowerCase().startsWith("b")) {
cmykCount++;
}
}
if (cmykCount < 1) {
foundCMYK = false;
}
}
public int getNumComponents() {
return names.size();
}
private float[] assignCMYK(float[] f) {
float[] f2 = new float[4];
Name name;
for (int i = 0, max = names.size(); i < max; i++) {
name = names.get(i);
if (name.getName().toLowerCase().startsWith("c")) {
f2[0] = i < f.length ? f[i] : 0;
} else if (name.getName().toLowerCase().startsWith("m")) {
f2[1] = i < f.length ? f[i] : 0;
} else if (name.getName().toLowerCase().startsWith("y")) {
f2[2] = i < f.length ? f[i] : 0;
} else if (name.getName().toLowerCase().startsWith("b") ||
name.getName().toLowerCase().startsWith("k")) {
f2[3] = i < f.length ? f[i] : 0;
}
}
if (f.length != 4) {
f2 = reverse(f2);
}
return f2;
}
public Color getColor(float[] f, boolean fillAndStroke) {
// calculate cmyk color
if (foundCMYK && (f.length == 4 )) {
f = assignCMYK(f);
return new DeviceCMYK(null, null).getColor((f));
}else if (foundCMYK && (f.length == 3)) {
f = assignCMYK(reverse(f));
return new DeviceCMYK(null, null).getColor((f));
}
// check order, mainly look for length > 1 and black not at the end
// assumption on a few corner cases is that we are looking for cmyk ordering
// and thus black last.
// if (f.length > 4 && names.size() > 4) {
// String name = names.get(names.size() - 1).getName().toLowerCase();
// if (!name.startsWith("b")) {
// f = reverse(f);
// }
// }
// otherwise use the alternative colour space.
float y[] = tintTransform.calculate(reverse(f));
return alternate.getColor(reverse(y));
}
}