diff options
author | Michael Bien <[email protected]> | 2010-03-27 23:24:13 +0100 |
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committer | Michael Bien <[email protected]> | 2010-03-27 23:24:13 +0100 |
commit | 2b954ff1fe88f35b59da6c6f6b82fde70274a6ef (patch) | |
tree | 4f83912cec4d43742cd3d39115b72a900c2aefe7 /src/jogl/classes/com/jogamp/opengl/util/awt/Overlay.java | |
parent | b5bc1819925148adfdb1f2baccdfe9ecd3dc4dbf (diff) |
refactoring: renamed com.sun.opengl -> com.jogamp.opengl.
Diffstat (limited to 'src/jogl/classes/com/jogamp/opengl/util/awt/Overlay.java')
-rwxr-xr-x | src/jogl/classes/com/jogamp/opengl/util/awt/Overlay.java | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/awt/Overlay.java b/src/jogl/classes/com/jogamp/opengl/util/awt/Overlay.java new file mode 100755 index 000000000..1275c9391 --- /dev/null +++ b/src/jogl/classes/com/jogamp/opengl/util/awt/Overlay.java @@ -0,0 +1,214 @@ +/* + * 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.jogamp.opengl.util.awt; + +import java.awt.Graphics2D; + +import javax.media.opengl.*; +import com.jogamp.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. */ + +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; + } + + /** Marks the given region of the overlay as dirty. This region, and + any previously set dirty regions, will be automatically + synchronized with the underlying Texture during the next {@link + #draw draw} or {@link #drawAll drawAll} operation, at which + point the dirty region will be cleared. It is not necessary for + an OpenGL context to be current when this method is called. + + @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 markDirty(int x, int y, int width, int height) { + renderer.markDirty(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; + } + } +} |