325 lines
10 KiB
Java
325 lines
10 KiB
Java
/*
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* Copyright (c) 2002-2004 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.Sys;
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import org.lwjgl.LWJGLException;
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import java.nio.IntBuffer;
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/**
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* $Id$
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* <p/>
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* Pbuffer encapsulates an OpenGL pbuffer.
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* <p/>
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* Each instance of GL is only valid in the thread that creates it. In addition, only one instance of an OpenGL window or
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* Pbuffer may be the current GL context in any one thread. To make a GL instance the current context, use makeCurrent().
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$
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*/
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public final class Pbuffer {
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/**
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* Indicates that Pbuffers can be created.
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*/
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public static final int PBUFFER_SUPPORTED = 1 << 0;
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/**
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* Indicates that Pbuffers can be used as render-textures.
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*/
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public static final int RENDER_TEXTURE_SUPPORTED = 1 << 1;
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/**
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* Indicates that Pbuffers can be used as non-power-of-two render-textures.
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*/
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public static final int RENDER_TEXTURE_RECTANGLE_SUPPORTED = 1 << 2;
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/**
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* Indicates that Pbuffers can be used as depth render-textures.
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*/
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public static final int RENDER_DEPTH_TEXTURE_SUPPORTED = 1 << 3;
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/**
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* The render-to-texture mipmap level attribute.
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*/
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public static final int MIPMAP_LEVEL = RenderTexture.WGL_MIPMAP_LEVEL_ARB;
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/**
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* The render-to-texture cube map face attribute.
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*/
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public static final int CUBE_MAP_FACE = RenderTexture.WGL_CUBE_MAP_FACE_ARB;
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/**
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* The render-to-texture cube map positive X face value.
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*/
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public static final int TEXTURE_CUBE_MAP_POSITIVE_X = RenderTexture.WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB;
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/**
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* The render-to-texture cube map negative X face value.
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*/
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public static final int TEXTURE_CUBE_MAP_NEGATIVE_X = RenderTexture.WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB;
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/**
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* The render-to-texture cube map positive Y face value.
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*/
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public static final int TEXTURE_CUBE_MAP_POSITIVE_Y = RenderTexture.WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB;
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/**
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* The render-to-texture cube map negative Y face value.
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*/
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public static final int TEXTURE_CUBE_MAP_NEGATIVE_Y = RenderTexture.WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB;
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/**
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* The render-to-texture cube map positive Z face value.
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*/
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public static final int TEXTURE_CUBE_MAP_POSITIVE_Z = RenderTexture.WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB;
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/**
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* The render-to-texture cube map negative Z face value.
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*/
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public static final int TEXTURE_CUBE_MAP_NEGATIVE_Z = RenderTexture.WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB;
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/**
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* The Pbuffer front left buffer.
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*/
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public static final int FRONT_LEFT_BUFFER = RenderTexture.WGL_FRONT_LEFT_ARB;
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/**
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* The Pbuffer front right buffer.
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*/
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public static final int FRONT_RIGHT_BUFFER = RenderTexture.WGL_FRONT_RIGHT_ARB;
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/**
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* The Pbuffer back left buffer.
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*/
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public static final int BACK_LEFT_BUFFER = RenderTexture.WGL_BACK_LEFT_ARB;
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/**
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* The Pbuffer back right buffer.
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*/
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public static final int BACK_RIGHT_BUFFER = RenderTexture.WGL_BACK_RIGHT_ARB;
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/**
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* The Pbuffer depth buffer.
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*/
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public static final int DEPTH_BUFFER = RenderTexture.WGL_DEPTH_COMPONENT_NV;
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/**
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* Current Pbuffer
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*/
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private static Pbuffer currentBuffer;
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/**
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* Handle to the native GL rendering context
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*/
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private final int handle;
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/**
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* Width
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*/
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private final int width;
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/**
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* Height
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*/
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private final int height;
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static {
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Sys.initialize();
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}
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/**
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* Construct an instance of a Pbuffer. If this fails then an LWJGLException will be thrown. The buffer is single-buffered.
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* <p/>
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* NOTE: An OpenGL window must be created before a Pbuffer can be created. The Pbuffer will have its own context that shares
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* display lists and textures with the OpenGL window context, but it will have its own OpenGL state. Therefore, state changes
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* to a pbuffer will not be seen in the window context and vice versa.
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* <p/>
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* NOTE: Some OpenGL implementations requires the shared contexts to use the same pixel format. So if possible, use the same
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* bpp, alpha, depth and stencil values used to create the main window.
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* <p/>
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* The renderTexture parameter defines the necessary state for enabling render-to-texture. When this parameter is null,
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* render-to-texture is not available. Before using render-to-texture, the Pbuffer capabilities must be queried to ensure that
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* it is supported.
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*
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* @param width Pbuffer width
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* @param height Pbuffer height
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* @param bpp Minimum bits per pixel
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* @param alpha Minimum bits per pixel in alpha buffer
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* @param depth Minimum bits per pixel in depth buffer
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* @param stencil Minimum bits per pixel in stencil buffer
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* @param samples Minimum samples in multisample buffer (corresponds to GL_SAMPLES_ARB in GL_ARB_multisample spec). Pass
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* 0 to disable multisampling. This parameter is ignored if GL_ARB_multisample is not supported.
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* @param renderTexture
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*/
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public Pbuffer(int width, int height, int bpp, int alpha, int depth, int stencil, int samples, RenderTexture renderTexture) throws LWJGLException {
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this.width = width;
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this.height = height;
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if ( renderTexture == null )
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handle = nCreate(width, height, bpp, alpha, depth, stencil, samples, null, 0, null, 0);
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else
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handle = nCreate(width, height,
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bpp, alpha, depth, stencil,
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samples,
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renderTexture.pixelFormatCaps, renderTexture.pixelFormatCaps.limit(),
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renderTexture.pBufferAttribs, renderTexture.pBufferAttribs.limit());
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}
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/**
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* Method to test for validity of the buffer. If this function returns true, the buffer contents is lost. The buffer can still
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* be used, but the results are undefined. The application is expected to release the buffer if needed, destroy it and recreate
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* a new buffer.
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*
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* @return true if the buffer is lost and destroyed, false if the buffer is valid.
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*/
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public synchronized boolean isBufferLost() {
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return nIsBufferLost(handle);
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}
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/**
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* Native method to test for buffer integrity
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*/
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private static native boolean nIsBufferLost(int handle);
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/**
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* Method to make the Pbuffer context current. All subsequent OpenGL calls will go to this buffer.
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*/
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public synchronized void makeCurrent() {
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currentBuffer = this;
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nMakeCurrent(handle);
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VBOTracker.setCurrent(this);
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}
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/**
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* Native method to make a pbuffer current.
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*/
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private static native void nMakeCurrent(int handle);
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/**
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* Gets the Pbuffer capabilities.
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*
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* @return a bitmask of Pbuffer capabilities.
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*/
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public static native int getPbufferCaps();
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/**
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* Native method to create a Pbuffer
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*/
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private static native int nCreate(int width, int height,
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int bpp, int alpha, int depth, int stencil,
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int samples,
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IntBuffer pixelFormatCaps, int pixelFormatCapsSize,
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IntBuffer pBufferAttribs, int pBufferAttribsSize) throws LWJGLException;
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/**
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* Destroys the Pbuffer. After this call, there will be no valid GL rendering context - regardless of whether this Pbuffer was
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* the current rendering context or not.
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*/
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public synchronized void destroy() {
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makeCurrent();
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int error = GL11.glGetError();
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VBOTracker.remove(this);
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nDestroy(handle);
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if (error != GL11.GL_NO_ERROR)
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throw new OpenGLException(error);
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}
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/**
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* Natively destroy any GL-related stuff
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*/
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private static native void nDestroy(int handle);
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// -----------------------------------------------------------------------------------------
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// ------------------------------- Render-to-Texture Methods -------------------------------
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// -----------------------------------------------------------------------------------------
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/**
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* Sets a render-to-texture attribute.
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* <p/>
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* The attrib parameter can be one of MIPMAP_LEVEL and CUBE_MAP_FACE. When the attrib parameter is CUBE_MAP_FACE then the value
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* parameter can be on of the following:
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* <p/>
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* TEXTURE_CUBE_MAP_POSITIVE_X TEXTURE_CUBE_MAP_NEGATIVE_X TEXTURE_CUBE_MAP_POSITIVE_Y TEXTURE_CUBE_MAP_NEGATIVE_Y
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* TEXTURE_CUBE_MAP_POSITIVE_Z TEXTURE_CUBE_MAP_NEGATIVE_Z
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*
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* @param attrib
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* @param value
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*/
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public synchronized void setAttrib(int attrib, int value) {
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nSetAttrib(handle, attrib, value);
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}
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private static native void nSetAttrib(int handle, int attrib, int value);
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/**
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* Binds the currently bound texture to the buffer specified. The buffer can be one of the following:
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* <p/>
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* FRONT_LEFT_BUFFER FRONT_RIGHT_BUFFER BACK_LEFT_BUFFER BACK_RIGHT_BUFFER DEPTH_BUFFER
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*
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* @param buffer
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*/
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public synchronized void bindTexImage(int buffer) {
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nBindTexImage(handle, buffer);
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}
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private static native void nBindTexImage(int handle, int buffer);
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/**
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* Releases the currently bound texture from the buffer specified.
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*
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* @param buffer
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*/
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public synchronized void releaseTexImage(int buffer) {
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nReleaseTexImage(handle, buffer);
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}
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private static native void nReleaseTexImage(int handle, int buffer);
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/**
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* @return Returns the height.
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*/
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public int getHeight() {
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return height;
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}
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/**
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* @return Returns the width.
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*/
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public int getWidth() {
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return width;
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}
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}
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