1 /* 2 * Copyright (c) 2002-2011 LWJGL Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'LWJGL' nor the names of 17 * its contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 package org.lwjgl.opengl; 34 35 import org.lwjgl.BufferChecks; 36 import org.lwjgl.LWJGLUtil; 37 38 import java.nio.ByteBuffer; 39 import java.nio.IntBuffer; 40 import java.nio.LongBuffer; 41 42 /** 43 * This class exposes the platform specific functionality present in the 44 * NV_present_video extension. 45 * 46 * @author Spasi 47 * @since 20/5/2011 48 */ 49 public final class NVPresentVideoUtil { 50 NVPresentVideoUtil()51 private NVPresentVideoUtil() {} 52 checkExtension()53 private static void checkExtension() { 54 if ( LWJGLUtil.CHECKS && !GLContext.getCapabilities().GL_NV_present_video ) 55 throw new IllegalStateException("NV_present_video is not supported"); 56 } 57 getPeerInfo()58 private static ByteBuffer getPeerInfo() { 59 return ContextGL.getCurrentContext().getPeerInfo().getHandle(); 60 } 61 62 /** 63 * Enumerate the available video output devices. This method is the cross-platform 64 * equivalent of glXEnumerateVideoDevicesNV and wglEnumerateVideoDevicesNV. Since they are 65 * not really compatible, this method works like the WGL version. That is, you first 66 * call it with a null devices buffer, get the number of devices, then call it again 67 * with an appropriately sized buffer. 68 * 69 * @param devices the buffer to store devices in 70 * 71 * @return the number of available video output devices 72 */ glEnumerateVideoDevicesNV(LongBuffer devices)73 public static int glEnumerateVideoDevicesNV(LongBuffer devices) { 74 checkExtension(); 75 76 if ( devices != null ) 77 BufferChecks.checkBuffer(devices, 1); 78 return nglEnumerateVideoDevicesNV(getPeerInfo(), devices, devices == null ? 0 : devices.position()); 79 } 80 nglEnumerateVideoDevicesNV(ByteBuffer peer_info, LongBuffer devices, int devices_position)81 private static native int nglEnumerateVideoDevicesNV(ByteBuffer peer_info, LongBuffer devices, int devices_position); 82 83 /** 84 * Binds the video output device specified to one of the context's available video output slots. 85 * This method is the cross-platform equivalent of glXBindVideoDeviceNV and wglBindVideoDeviceNV. 86 * To release a video device without binding another device to the same slot, call it with 87 * video_device set to 0 (will use INVALID_HANDLE_VALUE on WGL). 88 * 89 * @param video_slot the video slot 90 * @param video_device the video device 91 * @param attrib_list the attributes to use 92 * 93 * @return true if the binding was successful 94 */ glBindVideoDeviceNV(int video_slot, long video_device, IntBuffer attrib_list)95 public static boolean glBindVideoDeviceNV(int video_slot, long video_device, IntBuffer attrib_list) { 96 checkExtension(); 97 98 if ( attrib_list != null ) 99 BufferChecks.checkNullTerminated(attrib_list); 100 return nglBindVideoDeviceNV(getPeerInfo(), video_slot, video_device, attrib_list, attrib_list == null ? 0 : attrib_list.position()); 101 } 102 nglBindVideoDeviceNV(ByteBuffer peer_info, int video_slot, long video_device, IntBuffer attrib_list, int attrib_list_position)103 private static native boolean nglBindVideoDeviceNV(ByteBuffer peer_info, int video_slot, long video_device, IntBuffer attrib_list, int attrib_list_position); 104 105 /** 106 * Queries an attribute associated with the current context. This method is the cross-platform 107 * equivalent of glXQueryContext and wglQueryCurrentContextNV. 108 * 109 * @param attrib the attribute to query 110 * @param value the buffer to store the value in 111 */ glQueryContextNV(int attrib, IntBuffer value)112 public static boolean glQueryContextNV(int attrib, IntBuffer value) { 113 checkExtension(); 114 115 BufferChecks.checkBuffer(value, 1); 116 ContextGL ctx = ContextGL.getCurrentContext(); 117 return nglQueryContextNV(ctx.getPeerInfo().getHandle(), ctx.getHandle(), attrib, value, value.position()); 118 } 119 nglQueryContextNV(ByteBuffer peer_info, ByteBuffer context_handle, int attrib, IntBuffer value, int value_position)120 private static native boolean nglQueryContextNV(ByteBuffer peer_info, ByteBuffer context_handle, int attrib, IntBuffer value, int value_position); 121 122 } 123