1 /*
2 * Copyright (c) 2011, 2014, 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 #import <JavaNativeFoundation/JavaNativeFoundation.h>
27
28 #import "jni_util.h"
29 #import "LWCToolkit.h"
30 #import "AWT_debug.h"
31
32
33 /*
34 * Class: sun_awt_CGraphicsEnvironment
35 * Method: initCocoa
36 * Signature: ()V
37 */
38 JNIEXPORT void JNICALL
39 Java_sun_awt_CGraphicsEnvironment_initCocoa
40 (JNIEnv *env, jclass self)
41 {
42 JNF_COCOA_ENTER(env);
43
44 // Inform Cocoa that we're multi-threaded.
45 // Creating a short-lived NSThread is the recommended way of doing so.
46 [NSThread detachNewThreadSelector:@selector(self) toTarget:[NSObject class] withObject:nil];
47
48 JNF_COCOA_EXIT(env);
49 }
50
51 #define MAX_DISPLAYS 64
52
53 /*
54 * Class: sun_awt_CGraphicsEnvironment
55 * Method: getDisplayIDs
56 * Signature: ()[I
57 */
58 JNIEXPORT jintArray JNICALL
59 Java_sun_awt_CGraphicsEnvironment_getDisplayIDs
60 (JNIEnv *env, jclass class)
61 {
62 jintArray ret = NULL;
63
64 JNF_COCOA_ENTER(env);
65
66 /* Get the count */
67 CGDisplayCount displayCount;
68 if (CGGetOnlineDisplayList(MAX_DISPLAYS, NULL, &displayCount) != kCGErrorSuccess) {
69 [JNFException raise:env
70 as:kInternalError
71 reason:"CGGetOnlineDisplayList() failed to get display count"];
72 return NULL;
73 }
74
75 /* Allocate an array and get the size list of display Ids */
76 CGDirectDisplayID displays[MAX_DISPLAYS];
77 if (CGGetOnlineDisplayList(displayCount, displays, &displayCount) != kCGErrorSuccess) {
78 [JNFException raise:env
79 as:kInternalError
80 reason:"CGGetOnlineDisplayList() failed to get display list"];
81 return NULL;
82 }
83
84 CGDisplayCount i;
85 CGDisplayCount displayActiveCount = 0; //Active and sleeping.
86 for (i = 0; i < displayCount; ++i) {
87 if (CGDisplayMirrorsDisplay(displays[i]) == kCGNullDirectDisplay) {
88 ++displayActiveCount;
89 } else {
90 displays[i] = kCGNullDirectDisplay;
91 }
92 }
93
94 /* Allocate a java array for display identifiers */
95 ret = JNFNewIntArray(env, displayActiveCount);
96
97 /* Initialize and return the backing int array */
98 assert(sizeof(jint) >= sizeof(CGDirectDisplayID));
99 jint *elems = (*env)->GetIntArrayElements(env, ret, 0);
100 CHECK_NULL_RETURN(elems, NULL);
101
102 /* Filter out the mirrored displays */
103 for (i = 0; i < displayCount; ++i) {
104 if (displays[i] != kCGNullDirectDisplay) {
105 elems[--displayActiveCount] = displays[i];
106 }
107 }
108
109 (*env)->ReleaseIntArrayElements(env, ret, elems, 0);
110
111 JNF_COCOA_EXIT(env);
112
113 return ret;
114 }
115
116 /*
117 * Class: sun_awt_CGraphicsEnvironment
118 * Method: getMainDisplayID
119 * Signature: ()I
120 */
121 JNIEXPORT jint JNICALL
122 Java_sun_awt_CGraphicsEnvironment_getMainDisplayID
123 (JNIEnv *env, jclass class)
124 {
125 return CGMainDisplayID();
126 }
127
128 /*
129 * Post the display reconfiguration event.
130 */
131 static void displaycb_handle
132 (CGDirectDisplayID display, CGDisplayChangeSummaryFlags flags, void *userInfo)
133 {
134 if (flags == kCGDisplayBeginConfigurationFlag) return;
135
136 JNFPerformEnvBlock(JNFThreadDetachImmediately, ^(JNIEnv *env) {
137 JNFWeakJObjectWrapper *wrapper = (JNFWeakJObjectWrapper *)userInfo;
138
139 jobject graphicsEnv = [wrapper jObjectWithEnv:env];
140 if (graphicsEnv == NULL) return; // ref already GC'd
141 static JNF_CLASS_CACHE(jc_CGraphicsEnvironment, "sun/awt/CGraphicsEnvironment");
142 static JNF_MEMBER_CACHE(jm_displayReconfiguration, jc_CGraphicsEnvironment, "_displayReconfiguration", "(IZ)V");
143 JNFCallVoidMethod(env, graphicsEnv, jm_displayReconfiguration,
144 (jint) display,
145 (jboolean) flags & kCGDisplayRemoveFlag);
146 });
147 }
148
149 /*
150 * Class: sun_awt_CGraphicsEnvironment
151 * Method: registerDisplayReconfiguration
152 * Signature: ()J
153 */
154 JNIEXPORT jlong JNICALL
155 Java_sun_awt_CGraphicsEnvironment_registerDisplayReconfiguration
156 (JNIEnv *env, jobject this)
157 {
158 jlong ret = 0L;
159
160 JNF_COCOA_ENTER(env);
161
162 JNFWeakJObjectWrapper *wrapper = [[JNFWeakJObjectWrapper wrapperWithJObject:this withEnv:env] retain];
163
164 /* Register the callback */
165 if (CGDisplayRegisterReconfigurationCallback(&displaycb_handle, wrapper) != kCGErrorSuccess) {
166 [JNFException raise:env
167 as:kInternalError
168 reason:"CGDisplayRegisterReconfigurationCallback() failed"];
169 return 0L;
170 }
171
172 ret = ptr_to_jlong(wrapper);
173
174 JNF_COCOA_EXIT(env);
175
176 return ret;
177 }
178
179 /*
180 * Class: sun_awt_CGraphicsEnvironment
181 * Method: deregisterDisplayReconfiguration
182 * Signature: (J)V
183 */
184 JNIEXPORT void JNICALL
185 Java_sun_awt_CGraphicsEnvironment_deregisterDisplayReconfiguration
186 (JNIEnv *env, jobject this, jlong p)
187 {
188 JNF_COCOA_ENTER(env);
189
190 JNFWeakJObjectWrapper *wrapper = (JNFWeakJObjectWrapper *)jlong_to_ptr(p);
191 if (!wrapper) return;
192
193 /* Remove the registration */
194 if (CGDisplayRemoveReconfigurationCallback(&displaycb_handle, wrapper) != kCGErrorSuccess) {
195 [JNFException raise:env
196 as:kInternalError
197 reason:"CGDisplayRemoveReconfigurationCallback() failed, leaking the callback context!"];
198 return;
199 }
200
201 [wrapper setJObject:NULL withEnv:env]; // more efficiant to pre-clear
202 [wrapper release];
203
204 JNF_COCOA_EXIT(env);
205 }