author | serb |
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/* |
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* Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#import "AWT_debug.h" |
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#import "jni_util.h" |
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#import "ThreadUtilities.h" |
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#import <JavaNativeFoundation/JavaNativeFoundation.h> |
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#define MAX_DISPLAYS 64 |
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/* |
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* Class: sun_awt_CGraphicsEnvironment |
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* Method: getDisplayIDs |
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* Signature: ()[I |
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*/ |
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JNIEXPORT jintArray JNICALL |
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Java_sun_awt_CGraphicsEnvironment_getDisplayIDs |
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(JNIEnv *env, jclass class) |
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{ |
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jintArray ret = NULL; |
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JNF_COCOA_ENTER(env); |
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/* Get the count */ |
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CGDisplayCount displayCount; |
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if (CGGetOnlineDisplayList(MAX_DISPLAYS, NULL, &displayCount) != kCGErrorSuccess) { |
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[JNFException raise:env |
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as:kInternalError |
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reason:"CGGetOnlineDisplayList() failed to get display count"]; |
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return NULL; |
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} |
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/* Allocate an array and get the size list of display Ids */ |
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CGDirectDisplayID displays[MAX_DISPLAYS]; |
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if (CGGetOnlineDisplayList(displayCount, displays, &displayCount) != kCGErrorSuccess) { |
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[JNFException raise:env |
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as:kInternalError |
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reason:"CGGetOnlineDisplayList() failed to get display list"]; |
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return NULL; |
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} |
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CGDisplayCount i; |
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CGDisplayCount displayActiveCount = 0; //Active and sleeping. |
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for (i = 0; i < displayCount; ++i) { |
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if (CGDisplayMirrorsDisplay(displays[i]) == kCGNullDirectDisplay) { |
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++displayActiveCount; |
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} else { |
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displays[i] = kCGNullDirectDisplay; |
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} |
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} |
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/* Allocate a java array for display identifiers */ |
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ret = JNFNewIntArray(env, displayActiveCount); |
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/* Initialize and return the backing int array */ |
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assert(sizeof(jint) >= sizeof(CGDirectDisplayID)); |
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jint *elems = (*env)->GetIntArrayElements(env, ret, 0); |
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CHECK_NULL_RETURN(elems, NULL); |
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/* Filter out the mirrored displays */ |
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for (i = 0; i < displayCount; ++i) { |
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if (displays[i] != kCGNullDirectDisplay) { |
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elems[--displayActiveCount] = displays[i]; |
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} |
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} |
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(*env)->ReleaseIntArrayElements(env, ret, elems, 0); |
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JNF_COCOA_EXIT(env); |
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return ret; |
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} |
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/* |
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* Class: sun_awt_CGraphicsEnvironment |
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* Method: getMainDisplayID |
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* Signature: ()I |
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*/ |
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JNIEXPORT jint JNICALL |
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Java_sun_awt_CGraphicsEnvironment_getMainDisplayID |
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(JNIEnv *env, jclass class) |
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{ |
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return CGMainDisplayID(); |
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} |
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/* |
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* Post the display reconfiguration event. |
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*/ |
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static void displaycb_handle |
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(CGDirectDisplayID display, CGDisplayChangeSummaryFlags flags, void *userInfo) |
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{ |
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if (flags == kCGDisplayBeginConfigurationFlag) return; |
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[ThreadUtilities performOnMainThreadWaiting:NO block:^() { |
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JNFPerformEnvBlock(JNFThreadDetachImmediately, ^(JNIEnv *env) { |
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JNFWeakJObjectWrapper *wrapper = (JNFWeakJObjectWrapper *)userInfo; |
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jobject graphicsEnv = [wrapper jObjectWithEnv:env]; |
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if (graphicsEnv == NULL) return; // ref already GC'd |
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static JNF_CLASS_CACHE(jc_CGraphicsEnvironment, "sun/awt/CGraphicsEnvironment"); |
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static JNF_MEMBER_CACHE(jm_displayReconfiguration, |
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jc_CGraphicsEnvironment, "_displayReconfiguration","(IZ)V"); |
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JNFCallVoidMethod(env, graphicsEnv, jm_displayReconfiguration, |
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(jint) display, (jboolean) flags & kCGDisplayRemoveFlag); |
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(*env)->DeleteLocalRef(env, graphicsEnv); |
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}); |
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}]; |
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} |
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/* |
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* Class: sun_awt_CGraphicsEnvironment |
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* Method: registerDisplayReconfiguration |
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* Signature: ()J |
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*/ |
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JNIEXPORT jlong JNICALL |
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Java_sun_awt_CGraphicsEnvironment_registerDisplayReconfiguration |
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(JNIEnv *env, jobject this) |
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{ |
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jlong ret = 0L; |
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JNF_COCOA_ENTER(env); |
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JNFWeakJObjectWrapper *wrapper = [[JNFWeakJObjectWrapper wrapperWithJObject:this withEnv:env] retain]; |
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/* Register the callback */ |
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if (CGDisplayRegisterReconfigurationCallback(&displaycb_handle, wrapper) != kCGErrorSuccess) { |
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[JNFException raise:env |
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as:kInternalError |
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reason:"CGDisplayRegisterReconfigurationCallback() failed"]; |
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return 0L; |
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} |
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ret = ptr_to_jlong(wrapper); |
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JNF_COCOA_EXIT(env); |
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return ret; |
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} |
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/* |
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* Class: sun_awt_CGraphicsEnvironment |
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* Method: deregisterDisplayReconfiguration |
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* Signature: (J)V |
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*/ |
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JNIEXPORT void JNICALL |
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Java_sun_awt_CGraphicsEnvironment_deregisterDisplayReconfiguration |
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(JNIEnv *env, jobject this, jlong p) |
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{ |
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JNF_COCOA_ENTER(env); |
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JNFWeakJObjectWrapper *wrapper = (JNFWeakJObjectWrapper *)jlong_to_ptr(p); |
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if (!wrapper) return; |
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/* Remove the registration */ |
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if (CGDisplayRemoveReconfigurationCallback(&displaycb_handle, wrapper) != kCGErrorSuccess) { |
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[JNFException raise:env |
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as:kInternalError |
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reason:"CGDisplayRemoveReconfigurationCallback() failed, leaking the callback context!"]; |
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return; |
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} |
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[wrapper setJObject:NULL withEnv:env]; // more efficient to pre-clear |
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[wrapper release]; |
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JNF_COCOA_EXIT(env); |
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} |