From 4b9a72c24bb97ed81c79c3931d4ffb5fa53d9978 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Sun, 4 Oct 2009 00:19:32 -0700
Subject: Add ReadBuffer Demos/ModuleTests; Incl. SurfaceUpdated Listener,
ReadPixel to file, texture - direct or via attaching the drawable to another
context as it's readbuffer
---
src/demos/readbuffer/ReadBufferUtil.java | 109 +++++++++++++++++++++++++++++++
1 file changed, 109 insertions(+)
create mode 100755 src/demos/readbuffer/ReadBufferUtil.java
(limited to 'src/demos/readbuffer/ReadBufferUtil.java')
diff --git a/src/demos/readbuffer/ReadBufferUtil.java b/src/demos/readbuffer/ReadBufferUtil.java
new file mode 100755
index 0000000..96f4b06
--- /dev/null
+++ b/src/demos/readbuffer/ReadBufferUtil.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2008 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.
+ *
+ */
+
+package demos.readbuffer;
+
+import java.nio.*;
+import javax.media.opengl.*;
+
+import com.sun.opengl.util.texture.Texture;
+import com.sun.opengl.util.texture.TextureData;
+import com.sun.opengl.util.BufferUtil;
+
+public class ReadBufferUtil {
+ protected int readPixelSizeLast = 0;
+ protected Buffer readPixelBuffer = null;
+ protected TextureData readTextureData = null;
+ protected Texture readTexture = new Texture(GL.GL_TEXTURE_2D);
+
+ public Buffer getPixelBuffer() { return readPixelBuffer; }
+ public void rewindPixelBuffer() { readPixelBuffer.rewind(); }
+
+ public TextureData getTextureData() { return readTextureData; }
+ public Texture getTexture() { return readTexture; }
+
+ public boolean isValid() {
+ return null!=readTexture && null!=readTextureData && null!=readPixelBuffer ;
+ }
+
+ public void fetchOffscreenTexture(GLDrawable drawable, GL gl) {
+ int readPixelSize = drawable.getWidth() * drawable.getHeight() * 3 ; // RGB
+ boolean newData = false;
+ if(readPixelSize>readPixelSizeLast) {
+ readPixelBuffer = BufferUtil.newGLBuffer(gl.GL_UNSIGNED_BYTE, readPixelSize);
+ readPixelSizeLast = readPixelSize ;
+ try {
+ readTextureData = new TextureData(
+ gl.GL_RGBA,
+ drawable.getWidth(), drawable.getHeight(),
+ 0,
+ gl.GL_RGB,
+ gl.GL_UNSIGNED_BYTE,
+ false, false,
+ false /* flip */,
+ readPixelBuffer,
+ null /* Flusher */);
+ newData = true;
+ } catch (Exception e) {
+ e.printStackTrace();
+ readTextureData = null;
+ readPixelBuffer = null;
+ readPixelSizeLast = 0;
+ }
+ }
+ if(null!=readPixelBuffer) {
+ readPixelBuffer.clear();
+ gl.glReadPixels(0, 0, drawable.getWidth(), drawable.getHeight(), GL.GL_RGB, GL.GL_UNSIGNED_BYTE, readPixelBuffer);
+ readPixelBuffer.rewind();
+ if(newData) {
+ readTexture.updateImage(readTextureData);
+ } else {
+ readTexture.updateSubImage(readTextureData, 0,
+ 0, 0, // src offset
+ 0, 0, // dst offset
+ drawable.getWidth(), drawable.getHeight());
+ }
+ readPixelBuffer.rewind();
+ }
+ }
+
+ public void dispose() {
+ readTexture.dispose();
+ readTextureData = null;
+ readPixelBuffer.clear();
+ readPixelBuffer = null;
+ readPixelSizeLast = 0;
+ }
+
+}
+
--
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