From 10c76681d1507fa527b59cb28bcde5d1c6a4fe18 Mon Sep 17 00:00:00 2001 From: Kenneth Russel Date: Thu, 4 Jan 2007 05:38:42 +0000 Subject: Moved J2DTextureRenderer and J2DOverlay into their own sub-package and dropped the prefixes on the suggestion of Chris Campbell. No other changes to these classes. Added com.sun.opengl.util.j2d to the javadoc generation. Updated demos. git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@1066 232f8b59-042b-4e1e-8c03-345bb8c30851 --- src/classes/com/sun/opengl/util/j2d/Overlay.java | 213 +++++++++++++++++++++++ 1 file changed, 213 insertions(+) create mode 100755 src/classes/com/sun/opengl/util/j2d/Overlay.java (limited to 'src/classes/com/sun/opengl/util/j2d/Overlay.java') diff --git a/src/classes/com/sun/opengl/util/j2d/Overlay.java b/src/classes/com/sun/opengl/util/j2d/Overlay.java new file mode 100755 index 000000000..d427ab176 --- /dev/null +++ b/src/classes/com/sun/opengl/util/j2d/Overlay.java @@ -0,0 +1,213 @@ +/* + * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * - Redistribution of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistribution in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * Neither the name of Sun Microsystems, Inc. or the names of + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * This software is provided "AS IS," without a warranty of any kind. ALL + * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, + * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN + * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR + * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR + * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR + * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR + * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE + * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, + * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF + * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + * + * You acknowledge that this software is not designed or intended for use + * in the design, construction, operation or maintenance of any nuclear + * facility. + * + * Sun gratefully acknowledges that this software was originally authored + * and developed by Kenneth Bradley Russell and Christopher John Kline. + */ + +package com.sun.opengl.util.j2d; + +import java.awt.Graphics2D; + +import javax.media.opengl.*; +import com.sun.opengl.util.texture.*; + +/** Provides a Java 2D overlay on top of an arbitrary GLDrawable, + making it easier to do things like draw text and images on top of + an OpenGL scene while still maintaining reasonably good + efficiency. For correct operation, the drawable should be + allocated with alpha bits enabled, as the Overlay uses alpha + blending to make portions of itself transparent. */ + +public class Overlay { + private GLDrawable drawable; + private TextureRenderer renderer; + private boolean contentsLost; + + /** Creates a new Java 2D overlay on top of the specified + GLDrawable. */ + public Overlay(GLDrawable drawable) { + this.drawable = drawable; + } + + /** Creates a {@link java.awt.Graphics2D Graphics2D} instance for + rendering into the overlay. The returned object should be + disposed of using the normal {@link java.awt.Graphics#dispose() + Graphics.dispose()} method once it is no longer being used. + + @return a new {@link java.awt.Graphics2D Graphics2D} object for + rendering into the backing store of this renderer + */ + public Graphics2D createGraphics() { + // Validate the size of the renderer against the current size of + // the drawable + validateRenderer(); + return renderer.createGraphics(); + } + + /** Indicates whether the Java 2D contents of the overlay were lost + since the last time {@link #createGraphics} was called. This + method should be called immediately after calling {@link + #createGraphics} to see whether the entire contents of the + overlay need to be redrawn or just the region the application is + interested in updating. + + @return whether the contents of the overlay were lost since the + last render + */ + public boolean contentsLost() { + return contentsLost; + } + + /** Synchronizes the contents of the Java 2D rendering down to the + OpenGL texture. + + @param x the x coordinate (in Java 2D coordinates -- relative to + upper left) of the region to update + @param y the y coordinate (in Java 2D coordinates -- relative to + upper left) of the region to update + @param width the width of the region to update + @param height the height of the region to update + + @throws GLException If an OpenGL context is not current when this method is called + */ + public void sync(int x, int y, int width, int height) throws GLException { + renderer.sync(x, y, width, height); + } + + /** Draws the entire contents of the overlay on top of the OpenGL + drawable. This is a convenience method which encapsulates all + portions of the rendering process; if this method is used, + {@link #beginRendering}, {@link #endRendering}, etc. should not + be used. This method should be called while the OpenGL context + for the drawable is current, and after your OpenGL scene has + been rendered. + + @throws GLException If an OpenGL context is not current when this method is called + */ + public void drawAll() throws GLException { + beginRendering(); + draw(0, 0, drawable.getWidth(), drawable.getHeight()); + endRendering(); + } + + /** Begins the OpenGL rendering process for the overlay. This is + separated out so advanced applications can render independent + pieces of the overlay to different portions of the drawable. + + @throws GLException If an OpenGL context is not current when this method is called + */ + public void beginRendering() throws GLException { + renderer.beginOrthoRendering(drawable.getWidth(), drawable.getHeight()); + } + + /** Ends the OpenGL rendering process for the overlay. This is + separated out so advanced applications can render independent + pieces of the overlay to different portions of the drawable. + + @throws GLException If an OpenGL context is not current when this method is called + */ + public void endRendering() throws GLException { + renderer.endOrthoRendering(); + } + + /** Draws the specified sub-rectangle of the overlay on top of the + OpenGL drawable. {@link #beginRendering} and {@link + #endRendering} must be used in conjunction with this method to + achieve proper rendering results. This method should be called + while the OpenGL context for the drawable is current, and after + your OpenGL scene has been rendered. + + @param x the lower-left x coordinate (relative to the lower left + of the overlay) of the rectangle to draw + @param y the lower-left y coordinate (relative to the lower left + of the overlay) of the rectangle to draw + @param width the width of the rectangle to draw + @param height the height of the rectangle to draw + + @throws GLException If an OpenGL context is not current when this method is called + */ + public void draw(int x, int y, int width, int height) throws GLException { + draw(x, y, x, y, width, height); + } + + /** Draws the specified sub-rectangle of the overlay at the + specified x and y coordinate on top of the OpenGL drawable. + {@link #beginRendering} and {@link #endRendering} must be used + in conjunction with this method to achieve proper rendering + results. This method should be called while the OpenGL context + for the drawable is current, and after your OpenGL scene has + been rendered. + + @param screenx the on-screen x coordinate at which to draw the rectangle + @param screeny the on-screen y coordinate (relative to lower left) at + which to draw the rectangle + @param overlayx the x coordinate of the pixel in the overlay of + the lower left portion of the rectangle to draw + @param overlayy the y coordinate of the pixel in the overlay + (relative to lower left) of the lower left portion of the + rectangle to draw + @param width the width of the rectangle to draw + @param height the height of the rectangle to draw + + @throws GLException If an OpenGL context is not current when this method is called + */ + public void draw(int screenx, int screeny, + int overlayx, int overlayy, + int width, int height) throws GLException { + renderer.drawOrthoRect(screenx, screeny, + overlayx, overlayy, + width, height); + } + + //---------------------------------------------------------------------- + // Internals only below this point + // + + private void validateRenderer() { + if (renderer == null) { + renderer = new TextureRenderer(drawable.getWidth(), + drawable.getHeight(), + true); + contentsLost = true; + } else if (renderer.getWidth() != drawable.getWidth() || + renderer.getHeight() != drawable.getHeight()) { + renderer.setSize(drawable.getWidth(), drawable.getHeight()); + contentsLost = true; + } else { + contentsLost = false; + } + } +} -- cgit v1.2.3