186 lines
6.2 KiB
Java
186 lines
6.2 KiB
Java
/*
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* Copyright (c) 2002-2010 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Utility class that handles OpenGL API callbacks.
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*
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* @author Spasi
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*/
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final class CallbackUtil {
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/** Context -> Long */
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private static final Map<ContextCapabilities, Long> contextUserParamsARB = new HashMap<ContextCapabilities, Long>();
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/** Context -> Long */
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private static final Map<ContextCapabilities, Long> contextUserParamsAMD = new HashMap<ContextCapabilities, Long>();
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/** Context -> Long */
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private static final Map<ContextCapabilities, Long> contextUserParamsKHR = new HashMap<ContextCapabilities, Long>();
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private CallbackUtil() {}
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/**
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* Creates a new global reference to the specified Object.
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*
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* @param obj the Object
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*
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* @return the GlobalRef memory address or 0 if the Object is null.
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*/
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static long createGlobalRef(final Object obj) {
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return obj == null ? 0 : ncreateGlobalRef(obj);
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}
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/**
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* Creates a new global reference to the specified Object.
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*
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* @param obj the Object
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*
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* @return the GlobalRef memory address.
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*/
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private static native long ncreateGlobalRef(Object obj);
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/**
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* Deletes a global reference.
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*
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* @param ref the GlobalRef memory address.
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*/
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private static native void deleteGlobalRef(long ref);
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// --------- [ XXX_debug_output ] ---------
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/**
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* Associates the current OpenGL context with the specified global reference. If there
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* is no context current, the global reference is deleted and an exception is thrown.
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* Any previous callback registrations will be cleared.
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*
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* @param userParam the global reference pointer
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*/
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private static void registerContextCallback(final long userParam, final Map<ContextCapabilities, Long> contextUserData) {
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ContextCapabilities caps = GLContext.getCapabilities();
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if ( caps == null ) {
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deleteGlobalRef(userParam);
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throw new IllegalStateException("No context is current.");
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}
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final Long userParam_old = contextUserData.remove(caps);
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if ( userParam_old != null )
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deleteGlobalRef(userParam_old);
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if ( userParam != 0 )
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contextUserData.put(caps, userParam);
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}
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/**
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* Releases references to any callbacks associated with the specified GL context.
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*
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* @param context the Context to unregister
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*/
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static void unregisterCallbacks(final Object context) {
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// TODO: This is never called for custom contexts. Need to fix for LWJGL 3.0
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final ContextCapabilities caps = GLContext.getCapabilities(context);
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Long userParam = contextUserParamsARB.remove(caps);
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if ( userParam != null )
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deleteGlobalRef(userParam);
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userParam = contextUserParamsAMD.remove(caps);
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if ( userParam != null )
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deleteGlobalRef(userParam);
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userParam = contextUserParamsKHR.remove(caps);
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if ( userParam != null )
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deleteGlobalRef(userParam);
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}
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// --------- [ ARB_debug_output ] ---------
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/**
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* Returns the memory address of the native function we pass to glDebugMessageCallbackARB.
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*
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* @return the callback function address
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*/
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static native long getDebugOutputCallbackARB();
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/**
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* Associates the current OpenGL context with the specified global reference. If there
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* is no context current, the global reference is deleted and an exception is thrown.
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* Any previous callback registrations will be cleared.
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*
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* @param userParam the global reference pointer
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*/
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static void registerContextCallbackARB(final long userParam) {
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registerContextCallback(userParam, contextUserParamsARB);
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}
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// --------- [ AMD_debug_output ] ---------
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/**
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* Returns the memory address of the native function we pass to glDebugMessageCallbackAMD.
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*
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* @return the callback function address
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*/
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static native long getDebugOutputCallbackAMD();
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/**
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* Associates the current OpenGL context with the specified global reference. If there
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* is no context current, the global reference is deleted and an exception is thrown.
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* Any previous callback registrations will be cleared.
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*
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* @param userParam the global reference pointer
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*/
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static void registerContextCallbackAMD(final long userParam) {
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registerContextCallback(userParam, contextUserParamsAMD);
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}
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// --------- [ KHR_debug ] ---------
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/**
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* Returns the memory address of the native function we pass to glDebugMessageCallback.
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*
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* @return the callback function address
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*/
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static native long getDebugCallbackKHR();
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/**
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* Associates the current OpenGL context with the specified global reference. If there
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* is no context current, the global reference is deleted and an exception is thrown.
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* Any previous callback registrations will be cleared.
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*
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* @param userParam the global reference pointer
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*/
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static void registerContextCallbackKHR(final long userParam) {
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registerContextCallback(userParam, contextUserParamsKHR);
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}
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} |