415 lines
12 KiB
Java
415 lines
12 KiB
Java
/*
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* Copyright (c) 2002-2008 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.LWJGLException;
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import org.lwjgl.LWJGLUtil;
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import org.lwjgl.PointerBuffer;
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import org.lwjgl.Sys;
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import java.awt.*;
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import java.awt.event.ComponentEvent;
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import java.awt.event.ComponentListener;
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import java.awt.event.HierarchyEvent;
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import java.awt.event.HierarchyListener;
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import static org.lwjgl.opengl.GL11.*;
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/**
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* <p/>
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* An AWT rendering context.
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* <p/>
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*
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* @author $Author$
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* $Id$
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* @version $Revision$
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*/
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public class AWTGLCanvas extends Canvas implements DrawableLWJGL, ComponentListener, HierarchyListener {
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private static final long serialVersionUID = 1L;
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private static final AWTCanvasImplementation implementation;
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private boolean update_context;
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private Object SYNC_LOCK = new Object();
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/** The requested pixel format */
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private final PixelFormat pixel_format;
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/** The drawable to share context with */
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private final Drawable drawable;
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/** The ContextAttribs to use when creating the context */
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private final ContextAttribs attribs;
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/** Context handle */
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private PeerInfo peer_info;
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private ContextGL context;
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/**
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* re-entry counter for support for re-entrant
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* redrawing in paint(). It happens when using dialog boxes.
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*/
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private int reentry_count;
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/** Tracks whether initGL() needs to be called */
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private boolean first_run;
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static {
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Sys.initialize();
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implementation = createImplementation();
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}
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static AWTCanvasImplementation createImplementation() {
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switch ( LWJGLUtil.getPlatform() ) {
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case LWJGLUtil.PLATFORM_LINUX:
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return new LinuxCanvasImplementation();
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case LWJGLUtil.PLATFORM_WINDOWS:
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return new WindowsCanvasImplementation();
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case LWJGLUtil.PLATFORM_MACOSX:
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return new MacOSXCanvasImplementation();
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default:
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throw new IllegalStateException("Unsupported platform");
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}
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}
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private void setUpdate() {
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synchronized ( SYNC_LOCK ) {
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update_context = true;
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}
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}
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public void setPixelFormat(final PixelFormatLWJGL pf) throws LWJGLException {
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throw new UnsupportedOperationException();
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}
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public void setPixelFormat(final PixelFormatLWJGL pf, final ContextAttribs attribs) throws LWJGLException {
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throw new UnsupportedOperationException();
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}
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public PixelFormatLWJGL getPixelFormat() {
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return pixel_format;
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}
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/** This method should only be called internally. */
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public ContextGL getContext() {
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return context;
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}
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/** This method should only be called internally. */
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public ContextGL createSharedContext() throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null ) throw new IllegalStateException("Canvas not yet displayable");
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return new ContextGL(peer_info, context.getContextAttribs(), context);
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}
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}
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public void checkGLError() {
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Util.checkGLError();
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}
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public void initContext(final float r, final float g, final float b) {
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// set background clear color
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glClearColor(r, g, b, 0.0f);
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// Clear window to avoid the desktop "showing through"
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glClear(GL_COLOR_BUFFER_BIT);
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}
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/** Constructor using the default PixelFormat. */
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public AWTGLCanvas() throws LWJGLException {
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this(new PixelFormat());
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}
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/**
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* Create an AWTGLCanvas with the requested PixelFormat on the default GraphicsDevice.
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*
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* @param pixel_format The desired pixel format. May not be null
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*/
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public AWTGLCanvas(PixelFormat pixel_format) throws LWJGLException {
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this(GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(), pixel_format);
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}
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/**
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* Create an AWTGLCanvas with the requested PixelFormat on the default GraphicsDevice.
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*
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* @param device the device to create the canvas on.
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* @param pixel_format The desired pixel format. May not be null
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*/
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public AWTGLCanvas(GraphicsDevice device, PixelFormat pixel_format) throws LWJGLException {
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this(device, pixel_format, null);
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}
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/**
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* Create an AWTGLCanvas with the requested PixelFormat on the specified GraphicsDevice.
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*
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* @param device the device to create the canvas on.
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* @param pixel_format The desired pixel format. May not be null
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* @param drawable The Drawable to share context with
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*/
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public AWTGLCanvas(GraphicsDevice device, PixelFormat pixel_format, Drawable drawable) throws LWJGLException {
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this(device, pixel_format, drawable, null);
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}
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/**
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* Create an AWTGLCanvas with the requested PixelFormat on the specified GraphicsDevice.
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*
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* @param device the device to create the canvas on.
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* @param pixel_format The desired pixel format. May not be null
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* @param drawable The Drawable to share context with
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* @param attribs The ContextAttribs to use when creating the context. (optional, may be null)
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*/
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public AWTGLCanvas(GraphicsDevice device, PixelFormat pixel_format, Drawable drawable, ContextAttribs attribs) throws LWJGLException {
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super(implementation.findConfiguration(device, pixel_format));
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if ( pixel_format == null )
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throw new NullPointerException("Pixel format must be non-null");
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addHierarchyListener(this);
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addComponentListener(this);
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this.drawable = drawable;
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this.pixel_format = pixel_format;
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this.attribs = attribs;
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}
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/* (non-Javadoc)
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* @see java.awt.Canvas#addNotify()
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*/
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public void addNotify() {
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super.addNotify();
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}
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/* (non-Javadoc)
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* @see java.awt.Component#removeNotify()
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*/
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public void removeNotify() {
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synchronized ( SYNC_LOCK ) {
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destroy();
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super.removeNotify();
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}
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}
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/** Set swap interval. */
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public void setSwapInterval(int swap_interval) throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null )
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throw new IllegalStateException("Canvas not yet displayable");
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ContextGL.setSwapInterval(swap_interval);
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}
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}
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/** Enable vsync */
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public void setVSyncEnabled(boolean enabled) throws LWJGLException {
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setSwapInterval(enabled ? 1 : 0);
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}
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/** Swap the canvas' buffer */
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public void swapBuffers() throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null )
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throw new IllegalStateException("Canvas not yet displayable");
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ContextGL.swapBuffers();
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}
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}
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public boolean isCurrent() throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null ) throw new IllegalStateException("Canvas not yet displayable");
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return context.isCurrent();
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}
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}
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/**
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* Make the canvas' context current. It is highly recommended that the context
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* is only made current inside the AWT thread (for example in an overridden paintGL()).
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*/
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public void makeCurrent() throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null )
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throw new IllegalStateException("Canvas not yet displayable");
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context.makeCurrent();
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}
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}
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public void releaseContext() throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null )
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throw new IllegalStateException("Canvas not yet displayable");
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if ( context.isCurrent() )
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context.releaseCurrent();
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}
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}
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/** Destroy the OpenGL context. This happens when the component becomes undisplayable */
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public final void destroy() {
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synchronized ( SYNC_LOCK ) {
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try {
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if ( context != null ) {
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context.forceDestroy();
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context = null;
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reentry_count = 0;
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peer_info.destroy();
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peer_info = null;
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}
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} catch (LWJGLException e) {
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throw new RuntimeException(e);
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}
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}
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}
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public final void setCLSharingProperties(final PointerBuffer properties) throws LWJGLException {
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synchronized ( SYNC_LOCK ) {
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if ( context == null )
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throw new IllegalStateException("Canvas not yet displayable");
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context.setCLSharingProperties(properties);
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}
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}
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/**
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* Override this to do initialising of the context.
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* It will be called once from paint(), immediately after
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* the context is created and made current.
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*/
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protected void initGL() {
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}
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/** Override this to do painting */
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protected void paintGL() {
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}
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/**
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* The default paint() operation makes the context current and calls paintGL() which should
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* be overridden to do GL operations.
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*/
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public final void paint(Graphics g) {
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LWJGLException exception = null;
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synchronized ( SYNC_LOCK ) {
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if ( !isDisplayable() )
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return;
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try {
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if ( peer_info == null ) {
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this.peer_info = implementation.createPeerInfo(this, pixel_format, attribs);
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}
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peer_info.lockAndGetHandle();
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try {
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if ( context == null ) {
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this.context = new ContextGL(peer_info, attribs, drawable != null ? (ContextGL)((DrawableLWJGL)drawable).getContext() : null);
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first_run = true;
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}
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if ( reentry_count == 0 )
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context.makeCurrent();
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reentry_count++;
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try {
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if ( update_context ) {
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context.update();
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update_context = false;
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}
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if ( first_run ) {
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first_run = false;
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initGL();
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}
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paintGL();
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} finally {
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reentry_count--;
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if ( reentry_count == 0 )
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context.releaseCurrent();
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}
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} finally {
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peer_info.unlock();
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}
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} catch (LWJGLException e) {
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exception = e;
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}
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}
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if ( exception != null )
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exceptionOccurred(exception);
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}
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/**
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* This method will be called if an unhandled LWJGLException occurs in paint().
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* Override this method to be notified of this.
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*
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* @param exception The exception that occurred.
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*/
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protected void exceptionOccurred(LWJGLException exception) {
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LWJGLUtil.log("Unhandled exception occurred, skipping paint(): " + exception);
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}
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/** override update to avoid clearing */
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public void update(Graphics g) {
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paint(g);
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}
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public void componentShown(ComponentEvent e) {
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}
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public void componentHidden(ComponentEvent e) {
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}
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public void componentResized(ComponentEvent e) {
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setUpdate();
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}
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public void componentMoved(ComponentEvent e) {
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setUpdate();
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}
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public void setLocation(int x, int y) {
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super.setLocation(x, y);
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setUpdate();
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}
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public void setLocation(Point p) {
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super.setLocation(p);
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setUpdate();
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}
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public void setSize(Dimension d) {
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super.setSize(d);
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setUpdate();
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}
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public void setSize(int width, int height) {
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super.setSize(width, height);
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setUpdate();
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}
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public void setBounds(int x, int y, int width, int height) {
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super.setBounds(x, y, width, height);
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setUpdate();
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}
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public void hierarchyChanged(HierarchyEvent e) {
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setUpdate();
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}
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}
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