1 /*
2 * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.AWTError;
29 import java.awt.Font;
30 import java.awt.GraphicsConfiguration;
31 import java.awt.GraphicsDevice;
32 import java.awt.HeadlessException;
33 import java.awt.Toolkit;
34 import java.lang.ref.WeakReference;
35 import java.util.ArrayList;
36 import java.util.HashMap;
37 import java.util.List;
38 import java.util.ListIterator;
39 import java.util.Map;
40
41 import sun.java2d.MacosxSurfaceManagerFactory;
42 import sun.java2d.SunGraphicsEnvironment;
43 import sun.java2d.SurfaceManagerFactory;
44
45 /**
46 * This is an implementation of a GraphicsEnvironment object for the default
47 * local GraphicsEnvironment used by the Java Runtime Environment for Mac OS X
48 * GUI environments.
49 *
50 * @see GraphicsDevice
51 * @see GraphicsConfiguration
52 */
53 public final class CGraphicsEnvironment extends SunGraphicsEnvironment {
54
55 /**
56 * Fetch an array of all valid CoreGraphics display identifiers.
57 */
58 private static native int[] getDisplayIDs();
59
60 /**
61 * Fetch the CoreGraphics display ID for the 'main' display.
62 */
63 private static native int getMainDisplayID();
64
65 /**
66 * Noop function that just acts as an entry point for someone to force a
67 * static initialization of this class.
68 */
69 public static void init() { }
70
71 static {
72 // Load libraries and initialize the Toolkit.
73 Toolkit.getDefaultToolkit();
74 // Install the correct surface manager factory.
75 SurfaceManagerFactory.setInstance(new MacosxSurfaceManagerFactory());
76 }
77
78 /**
79 * Register the instance with CGDisplayRegisterReconfigurationCallback().
80 * The registration uses a weak global reference -- if our instance is
81 * garbage collected, the reference will be dropped.
82 *
83 * @return Return the registration context (a pointer).
84 */
85 private native long registerDisplayReconfiguration();
86
87 /**
88 * Remove the instance's registration with CGDisplayRemoveReconfigurationCallback()
89 */
90 private native void deregisterDisplayReconfiguration(long context);
91
92 /** Available CoreGraphics displays. */
93 private final Map<Integer, CGraphicsDevice> devices = new HashMap<>(5);
94 /**
95 * The key in the {@link #devices} for the main display.
96 */
97 private int mainDisplayID;
98
99 /** Reference to the display reconfiguration callback context. */
100 private final long displayReconfigContext;
101
102 // list of invalidated graphics devices (those which were removed)
103 private List<WeakReference<CGraphicsDevice>> oldDevices = new ArrayList<>();
104
105 /**
106 * Construct a new instance.
107 */
108 public CGraphicsEnvironment() {
109 if (isHeadless()) {
110 displayReconfigContext = 0L;
111 return;
112 }
113
114 /* Populate the device table */
115 initDevices();
116
117 /* Register our display reconfiguration listener */
118 displayReconfigContext = registerDisplayReconfiguration();
119 if (displayReconfigContext == 0L) {
120 throw new RuntimeException("Could not register CoreGraphics display reconfiguration callback");
121 }
122 }
123
124 /**
125 * Called by the CoreGraphics Display Reconfiguration Callback.
126 *
127 * @param displayId CoreGraphics displayId
128 * @param removed true if displayId was removed, false otherwise.
129 */
130 void _displayReconfiguration(final int displayId, final boolean removed) {
131 synchronized (this) {
132 if (removed && devices.containsKey(displayId)) {
133 final CGraphicsDevice gd = devices.remove(displayId);
134 oldDevices.add(new WeakReference<>(gd));
135 }
136 }
137 initDevices();
138
139 // Need to notify old devices, in case the user hold the reference to it
140 for (ListIterator<WeakReference<CGraphicsDevice>> it =
141 oldDevices.listIterator(); it.hasNext(); ) {
142 CGraphicsDevice gd = it.next().get();
143 if (gd != null) {
144 gd.invalidate(mainDisplayID);
145 gd.displayChanged();
146 } else {
147 // no more references to this device, remove it
148 it.remove();
149 }
150 }
151 }
152
153 @Override
154 @SuppressWarnings("deprecation")
155 protected void finalize() throws Throwable {
156 try {
157 super.finalize();
158 } finally {
159 deregisterDisplayReconfiguration(displayReconfigContext);
160 }
161 }
162
163 /**
164 * (Re)create all CGraphicsDevices, reuses a devices if it is possible.
165 */
166 private void initDevices() {
167 synchronized (this) {
168 final Map<Integer, CGraphicsDevice> old = new HashMap<>(devices);
169 devices.clear();
170
171 mainDisplayID = getMainDisplayID();
172
173 // initialization of the graphics device may change
174 // list of displays on hybrid systems via an activation
175 // of discrete video.
176 // So, we initialize the main display first, and then
177 // retrieve actual list of displays.
178 if (!old.containsKey(mainDisplayID)) {
179 old.put(mainDisplayID, new CGraphicsDevice(mainDisplayID));
180 }
181
182 for (final int id : getDisplayIDs()) {
183 devices.put(id, old.containsKey(id) ? old.get(id)
184 : new CGraphicsDevice(id));
185 }
186 }
187 displayChanged();
188 }
189
190 @Override
191 public synchronized GraphicsDevice getDefaultScreenDevice() throws HeadlessException {
192 CGraphicsDevice d = devices.get(mainDisplayID);
193 if (d == null) {
194 // we do not expect that this may happen, the only response
195 // is to re-initialize the list of devices
196 initDevices();
197
198 d = devices.get(mainDisplayID);
199 if (d == null) {
200 throw new AWTError("no screen devices");
201 }
202 }
203 return d;
204 }
205
206 @Override
207 public synchronized GraphicsDevice[] getScreenDevices() throws HeadlessException {
208 return devices.values().toArray(new CGraphicsDevice[devices.values().size()]);
209 }
210
211 public synchronized GraphicsDevice getScreenDevice(int displayID) {
212 return devices.get(displayID);
213 }
214
215 @Override
216 protected synchronized int getNumScreens() {
217 return devices.size();
218 }
219
220 @Override
221 protected GraphicsDevice makeScreenDevice(int screennum) {
222 throw new UnsupportedOperationException("This method is unused and should not be called in this implementation");
223 }
224
225 @Override
226 public boolean isDisplayLocal() {
227 return true;
228 }
229
230 static String[] sLogicalFonts = { "Serif", "SansSerif", "Monospaced", "Dialog", "DialogInput" };
231
232 @Override
233 public Font[] getAllFonts() {
234
235 Font[] newFonts;
236 Font[] superFonts = super.getAllFonts();
237
238 int numLogical = sLogicalFonts.length;
239 int numOtherFonts = superFonts.length;
240
241 newFonts = new Font[numOtherFonts + numLogical];
242 System.arraycopy(superFonts,0,newFonts,numLogical,numOtherFonts);
243
244 for (int i = 0; i < numLogical; i++)
245 {
246 newFonts[i] = new Font(sLogicalFonts[i], Font.PLAIN, 1);
247 }
248 return newFonts;
249 }
250
251 }