123 lines
4.8 KiB
Java
123 lines
4.8 KiB
Java
/*
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* Copyright (c) 2002-2011 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 org.lwjgl.BufferChecks;
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import org.lwjgl.LWJGLUtil;
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import java.nio.ByteBuffer;
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import java.nio.IntBuffer;
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import java.nio.LongBuffer;
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/**
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* This class exposes the platform specific functionality present in the
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* NV_present_video extension.
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*
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* @author Spasi
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* @since 20/5/2011
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*/
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public final class NVPresentVideoUtil {
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private NVPresentVideoUtil() {}
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private static void checkExtension() {
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if ( LWJGLUtil.CHECKS && !GLContext.getCapabilities().GL_NV_present_video )
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throw new IllegalStateException("NV_present_video is not supported");
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}
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private static ByteBuffer getPeerInfo() {
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return ContextGL.getCurrentContext().getPeerInfo().getHandle();
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}
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/**
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* Enumerate the available video output devices. This method is the cross-platform
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* equivalent of glXEnumerateVideoDevicesNV and wglEnumerateVideoDevicesNV. Since they are
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* not really compatible, this method works like the WGL version. That is, you first
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* call it with a null devices buffer, get the number of devices, then call it again
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* with an appropriately sized buffer.
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*
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* @param devices the buffer to store devices in
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*
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* @return the number of available video output devices
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*/
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public static int glEnumerateVideoDevicesNV(LongBuffer devices) {
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checkExtension();
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if ( devices != null )
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BufferChecks.checkBuffer(devices, 1);
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return nglEnumerateVideoDevicesNV(getPeerInfo(), devices, devices == null ? 0 : devices.position());
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}
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private static native int nglEnumerateVideoDevicesNV(ByteBuffer peer_info, LongBuffer devices, int devices_position);
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/**
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* Binds the video output device specified to one of the context's available video output slots.
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* This method is the cross-platform equivalent of glXBindVideoDeviceNV and wglBindVideoDeviceNV.
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* To release a video device without binding another device to the same slot, call it with
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* video_device set to 0 (will use INVALID_HANDLE_VALUE on WGL).
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*
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* @param video_slot the video slot
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* @param video_device the video device
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* @param attrib_list the attributes to use
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*
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* @return true if the binding was successful
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*/
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public static boolean glBindVideoDeviceNV(int video_slot, long video_device, IntBuffer attrib_list) {
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checkExtension();
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if ( attrib_list != null )
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BufferChecks.checkNullTerminated(attrib_list);
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return nglBindVideoDeviceNV(getPeerInfo(), video_slot, video_device, attrib_list, attrib_list == null ? 0 : attrib_list.position());
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}
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private static native boolean nglBindVideoDeviceNV(ByteBuffer peer_info, int video_slot, long video_device, IntBuffer attrib_list, int attrib_list_position);
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/**
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* Queries an attribute associated with the current context. This method is the cross-platform
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* equivalent of glXQueryContext and wglQueryCurrentContextNV.
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*
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* @param attrib the attribute to query
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* @param value the buffer to store the value in
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*/
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public static boolean glQueryContextNV(int attrib, IntBuffer value) {
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checkExtension();
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BufferChecks.checkBuffer(value, 1);
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ContextGL ctx = ContextGL.getCurrentContext();
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return nglQueryContextNV(ctx.getPeerInfo().getHandle(), ctx.getHandle(), attrib, value, value.position());
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}
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private static native boolean nglQueryContextNV(ByteBuffer peer_info, ByteBuffer context_handle, int attrib, IntBuffer value, int value_position);
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}
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