1 /*
2 * Copyright (c) 2011, 2015, 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 "AWT_debug.h"
27
28 #import "jni_util.h"
29
30 #import <JavaNativeFoundation/JavaNativeFoundation.h>
31
32 #define MAX_DISPLAYS 64
33
34 /*
35 * Class: sun_awt_CGraphicsEnvironment
36 * Method: getDisplayIDs
37 * Signature: ()[I
38 */
39 JNIEXPORT jintArray JNICALL
40 Java_sun_awt_CGraphicsEnvironment_getDisplayIDs
41 (JNIEnv *env, jclass class)
42 {
43 jintArray ret = NULL;
44
45 JNF_COCOA_ENTER(env);
46
47 /* Get the count */
48 CGDisplayCount displayCount;
49 if (CGGetOnlineDisplayList(MAX_DISPLAYS, NULL, &displayCount) != kCGErrorSuccess) {
50 [JNFException raise:env
51 as:kInternalError
52 reason:"CGGetOnlineDisplayList() failed to get display count"];
53 return NULL;
54 }
55
56 /* Allocate an array and get the size list of display Ids */
57 CGDirectDisplayID displays[MAX_DISPLAYS];
58 if (CGGetOnlineDisplayList(displayCount, displays, &displayCount) != kCGErrorSuccess) {
59 [JNFException raise:env
60 as:kInternalError
61 reason:"CGGetOnlineDisplayList() failed to get display list"];
62 return NULL;
63 }
64
65 CGDisplayCount i;
66 CGDisplayCount displayActiveCount = 0; //Active and sleeping.
67 for (i = 0; i < displayCount; ++i) {
68 if (CGDisplayMirrorsDisplay(displays[i]) == kCGNullDirectDisplay) {
69 ++displayActiveCount;
70 } else {
71 displays[i] = kCGNullDirectDisplay;
72 }
73 }
74
75 /* Allocate a java array for display identifiers */
76 ret = JNFNewIntArray(env, displayActiveCount);
77
78 /* Initialize and return the backing int array */
79 assert(sizeof(jint) >= sizeof(CGDirectDisplayID));
80 jint *elems = (*env)->GetIntArrayElements(env, ret, 0);
81 CHECK_NULL_RETURN(elems, NULL);
82
83 /* Filter out the mirrored displays */
84 for (i = 0; i < displayCount; ++i) {
85 if (displays[i] != kCGNullDirectDisplay) {
86 elems[--displayActiveCount] = displays[i];
87 }
88 }
89
90 (*env)->ReleaseIntArrayElements(env, ret, elems, 0);
91
92 JNF_COCOA_EXIT(env);
93
94 return ret;
95 }
96
97 /*
98 * Class: sun_awt_CGraphicsEnvironment
99 * Method: getMainDisplayID
100 * Signature: ()I
101 */
102 JNIEXPORT jint JNICALL
103 Java_sun_awt_CGraphicsEnvironment_getMainDisplayID
104 (JNIEnv *env, jclass class)
105 {
106 return CGMainDisplayID();
107 }
108
109 /*
110 * Post the display reconfiguration event.
111 */
112 static void displaycb_handle
113 (CGDirectDisplayID display, CGDisplayChangeSummaryFlags flags, void *userInfo)
114 {
115 if (flags == kCGDisplayBeginConfigurationFlag) return;
116
117 JNFPerformEnvBlock(JNFThreadDetachImmediately, ^(JNIEnv *env) {
118 JNFWeakJObjectWrapper *wrapper = (JNFWeakJObjectWrapper *)userInfo;
119
120 jobject graphicsEnv = [wrapper jObjectWithEnv:env];
121 if (graphicsEnv == NULL) return; // ref already GC'd
122 static JNF_CLASS_CACHE(jc_CGraphicsEnvironment, "sun/awt/CGraphicsEnvironment");
123 static JNF_MEMBER_CACHE(jm_displayReconfiguration, jc_CGraphicsEnvironment, "_displayReconfiguration", "(IZ)V");
124 JNFCallVoidMethod(env, graphicsEnv, jm_displayReconfiguration,
125 (jint) display,
126 (jboolean) flags & kCGDisplayRemoveFlag);
127 });
128 }
129
130 /*
131 * Class: sun_awt_CGraphicsEnvironment
132 * Method: registerDisplayReconfiguration
133 * Signature: ()J
134 */
135 JNIEXPORT jlong JNICALL
136 Java_sun_awt_CGraphicsEnvironment_registerDisplayReconfiguration
137 (JNIEnv *env, jobject this)
138 {
139 jlong ret = 0L;
140
141 JNF_COCOA_ENTER(env);
142
143 JNFWeakJObjectWrapper *wrapper = [[JNFWeakJObjectWrapper wrapperWithJObject:this withEnv:env] retain];
144
145 /* Register the callback */
146 if (CGDisplayRegisterReconfigurationCallback(&displaycb_handle, wrapper) != kCGErrorSuccess) {
147 [JNFException raise:env
148 as:kInternalError
149 reason:"CGDisplayRegisterReconfigurationCallback() failed"];
150 return 0L;
151 }
152
153 ret = ptr_to_jlong(wrapper);
154
155 JNF_COCOA_EXIT(env);
156
157 return ret;
158 }
159
160 /*
161 * Class: sun_awt_CGraphicsEnvironment
162 * Method: deregisterDisplayReconfiguration
163 * Signature: (J)V
164 */
165 JNIEXPORT void JNICALL
166 Java_sun_awt_CGraphicsEnvironment_deregisterDisplayReconfiguration
167 (JNIEnv *env, jobject this, jlong p)
168 {
169 JNF_COCOA_ENTER(env);
170
171 JNFWeakJObjectWrapper *wrapper = (JNFWeakJObjectWrapper *)jlong_to_ptr(p);
172 if (!wrapper) return;
173
174 /* Remove the registration */
175 if (CGDisplayRemoveReconfigurationCallback(&displaycb_handle, wrapper) != kCGErrorSuccess) {
176 [JNFException raise:env
177 as:kInternalError
178 reason:"CGDisplayRemoveReconfigurationCallback() failed, leaking the callback context!"];
179 return;
180 }
181
182 [wrapper setJObject:NULL withEnv:env]; // more efficiant to pre-clear
183 [wrapper release];
184
185 JNF_COCOA_EXIT(env);
186 }