Using GlueGen IOUtil (dropped StreamUtil, FileUtil); Public GLReadBufferUtil (screenshot etc) and GLPixelStorageModes

- Using GlueGen IOUtil, dropping StreamUtil and FileUtil

- Public (util) GLReadBufferUtil for screenshots and slow r2t (AWT less), as well as GLPixelStorageModes

21 files changed, 390 insertions, 549 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/FileUtil.java b/src/jogl/classes/com/jogamp/opengl/util/FileUtil.java
deleted file mode 100644
index 6ad0da825..000000000
--- a/src/jogl/classes/com/jogamp/opengl/util/FileUtil.java
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright (c) 2005 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;
-
-import java.io.*;
-
-/** Utilities for dealing with files. */
-
-public class FileUtil {
-    private FileUtil() {}
-
-    /**
-     * Returns the lowercase suffix of the given file name (the text
-     * after the last '.' in the file name). Returns null if the file
-     * name has no suffix. Only operates on the given file name;
-     * performs no I/O operations.
-     *
-     * @param file name of the file
-     * @return lowercase suffix of the file name
-     * @throws NullPointerException if file is null
-     */
-
-    public static String getFileSuffix(File file) {
-        return getFileSuffix(file.getName());
-    }
-
-    /**
-     * Returns the lowercase suffix of the given file name (the text
-     * after the last '.' in the file name). Returns null if the file
-     * name has no suffix. Only operates on the given file name;
-     * performs no I/O operations.
-     *
-     * @param filename name of the file
-     * @return lowercase suffix of the file name
-     * @throws NullPointerException if filename is null
-     */
-    public static String getFileSuffix(String filename) {
-        int lastDot = filename.lastIndexOf('.');
-        if (lastDot < 0) {
-            return null;
-        }
-        return toLowerCase(filename.substring(lastDot + 1));
-    }
-
-    private static String toLowerCase(String arg) {
-        if (arg == null) {
-            return null;
-        }
-
-        return arg.toLowerCase();
-    }
-}
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLPixelStorageModes.java b/src/jogl/classes/com/jogamp/opengl/util/GLPixelStorageModes.java
new file mode 100644
index 000000000..e9cccbb93
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLPixelStorageModes.java
@@ -0,0 +1,108 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.opengl.util;
+
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GLException;
+
+/**
+ * Utility to safely set and restore the pack and unpack pixel storage mode,
+ * regardless of the GLProfile.
+ */
+public class GLPixelStorageModes {
+    int savedPackAlignment;
+    int savedUnpackAlignment;
+    int[] tmp = new int[1];
+    boolean saved = false;
+
+    static int glGetInteger(GL gl, int pname, int[] tmp) {
+        gl.glGetIntegerv(pname, tmp, 0);
+        return tmp[0];
+    }
+    
+    private final void save(GL gl) {
+        if(gl.isGL2()) {  
+            gl.getGL2().glPushClientAttrib(GL2.GL_CLIENT_PIXEL_STORE_BIT);
+            gl.glPixelStorei(GL2.GL_PACK_ROW_LENGTH, 0);
+            gl.glPixelStorei(GL2.GL_PACK_SKIP_ROWS, 0);
+            gl.glPixelStorei(GL2.GL_PACK_SKIP_PIXELS, 0);
+            gl.glPixelStorei(GL2.GL_PACK_SWAP_BYTES, 0);
+        } else {
+            // core and embedded only deal with pack/unpack alignment
+            savedPackAlignment = glGetInteger(gl, GL2ES2.GL_PACK_ALIGNMENT, tmp);
+            savedUnpackAlignment = glGetInteger(gl, GL2ES2.GL_UNPACK_ALIGNMENT, tmp);
+        }        
+        saved = true;
+    }
+
+    /**
+     * Sets the {@link GL2ES2.GL_PACK_ALIGNMENT}. Saves the pixel storage modes if not saved yet.
+     */
+    public final void setPackAlignment(GL gl, int packAlignment) {
+        if(!saved) { save(gl); }
+        gl.glPixelStorei(GL2ES2.GL_PACK_ALIGNMENT, packAlignment);        
+    }
+
+    /**
+     * Sets the {@link GL2ES2.GL_UNPACK_ALIGNMENT}. Saves the pixel storage modes if not saved yet.
+     */
+    public final void setUnpackAlignment(GL gl, int unpackAlignment) {
+        if(!saved) { save(gl); }
+        gl.glPixelStorei(GL2ES2.GL_UNPACK_ALIGNMENT, unpackAlignment);        
+    }
+    
+    /**
+     * Sets the {@link GL2ES2.GL_PACK_ALIGNMENT} and {@link GL2ES2.GL_UNPACK_ALIGNMENT}. 
+     * Saves the pixel storage modes if not saved yet.
+     */
+    public final void setAlignment(GL gl, int packAlignment, int unpackAlignment) {
+        setPackAlignment(gl, packAlignment);
+        setUnpackAlignment(gl, unpackAlignment);
+    }
+    
+    /**
+     * Restores the pixel storage mode.
+     * @throws GLException if not saved via one of the set methods.
+     */
+    public final void restore(GL gl) throws GLException {
+        if(!saved) {
+            throw new GLException("pixel storage modes not saved");
+        }
+        if(gl.isGL2()) {  
+            gl.getGL2().glPopClientAttrib();
+        } else {
+            gl.glPixelStorei(GL2ES2.GL_PACK_ALIGNMENT, savedPackAlignment);
+        }
+        saved = false;
+    }      
+}
+
+
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLReadBufferUtil.java b/src/jogl/classes/com/jogamp/opengl/util/GLReadBufferUtil.java
new file mode 100644
index 000000000..e5cf7d0d0
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLReadBufferUtil.java
@@ -0,0 +1,181 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions 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.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+ 
+package com.jogamp.opengl.util;
+
+import com.jogamp.common.nio.Buffers;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.*;
+import javax.media.opengl.*;
+
+import com.jogamp.opengl.util.texture.Texture;
+import com.jogamp.opengl.util.texture.TextureData;
+import com.jogamp.opengl.util.texture.TextureIO;
+
+/**
+ * Utility to read out the current FB to TextureData, optionally writing the data back to a texture object.
+ * <p>May be used directly to write the TextureData to file (screenshot).</p>
+ */
+public class GLReadBufferUtil {
+    protected final int components, alignment; 
+    protected final Texture readTexture;
+    protected final GLPixelStorageModes psm;
+    
+    protected int readPixelSizeLast = 0;
+    protected ByteBuffer readPixelBuffer = null;
+    protected TextureData readTextureData = null;
+
+    /**
+     * @param alpha true for RGBA readPixels, otherwise RGB readPixels 
+     * @param write2Texture true if readPixel's TextureData shall be written to a 2d Texture
+     */
+    public GLReadBufferUtil(boolean alpha, boolean write2Texture) {
+        components = alpha ? 4 : 3 ;
+        alignment = alpha ? 4 : 1 ; 
+        readTexture = write2Texture ? new Texture(GL.GL_TEXTURE_2D) : null ;
+        psm = new GLPixelStorageModes();
+    }
+    
+    public boolean isValid() {
+      return null!=readTextureData && null!=readPixelBuffer ;
+    }
+    
+    /**
+     * @return the raw pixel ByteBuffer, filled by {@link #readPixels(GLAutoDrawable, boolean)}
+     */
+    public ByteBuffer getPixelBuffer() { return readPixelBuffer; }
+    
+    /**
+     * rewind the raw pixel ByteBuffer
+     */
+    public void rewindPixelBuffer() { if( null != readPixelBuffer ) { readPixelBuffer.rewind(); } }
+
+    /**
+     * @return the resulting TextureData, filled by {@link #readPixels(GLAutoDrawable, boolean)}
+     */
+    public TextureData getTextureData() { return readTextureData; }
+    
+    /**
+     * @return the Texture object filled by {@link #readPixels(GLAutoDrawable, boolean)},
+     *         if this instance writes to a 2d Texture, otherwise null.
+     * @see #GLReadBufferUtil(boolean, boolean)
+     */
+    public Texture getTexture() { return readTexture; }
+
+    /**
+     * Write the TextureData filled by {@link #readPixels(GLAutoDrawable, boolean)} to file
+     */
+    public void write(File dest) {
+        try {
+            TextureIO.write(readTextureData, dest);
+            rewindPixelBuffer();
+        } catch (IOException ex) {
+            throw new RuntimeException("can not write to file: " + dest.getAbsolutePath(), ex);
+        }
+    }
+
+    /**
+     * Read the drawable's pixels to TextureData and Texture, if requested at construction
+     * 
+     * @param gl the current GL object
+     * @param drawable the drawable to read from
+     * @param flip weather to flip the data vertically or not
+     * 
+     * @see #GLReadBufferUtil(boolean, boolean)
+     */
+    public void readPixels(GL gl, GLDrawable drawable, boolean flip) {
+        final int textureInternalFormat, textureDataFormat;
+        final int textureDataType = GL.GL_UNSIGNED_BYTE;
+        if(4 == components) {
+            textureInternalFormat=GL.GL_RGBA;
+            textureDataFormat=GL.GL_RGBA;
+        } else {
+            textureInternalFormat=GL.GL_RGB;
+            textureDataFormat=GL.GL_RGB;
+        }
+        final int readPixelSize = drawable.getWidth() * drawable.getHeight() * components ;
+        boolean newData = false;
+        if(readPixelSize>readPixelSizeLast) {
+            readPixelBuffer = Buffers.newDirectByteBuffer(readPixelSize);
+            readPixelSizeLast = readPixelSize ;
+            try {
+                readTextureData = new TextureData(
+                           gl.getGLProfile(),
+                           textureInternalFormat,
+                           drawable.getWidth(), drawable.getHeight(),
+                           0, 
+                           textureDataFormat,
+                           textureDataType,
+                           false, false, 
+                           flip,
+                           readPixelBuffer,
+                           null /* Flusher */);
+                newData = true;
+            } catch (Exception e) {
+                readTextureData = null;
+                readPixelBuffer = null;
+                readPixelSizeLast = 0;
+                throw new RuntimeException("can not fetch offscreen texture", e);
+            }
+        }
+        if(null!=readPixelBuffer) {
+            psm.setAlignment(gl, alignment, alignment);
+            readPixelBuffer.clear();
+            gl.glReadPixels(0, 0, drawable.getWidth(), drawable.getHeight(), textureDataFormat, textureDataType, readPixelBuffer);
+            readPixelBuffer.rewind();
+            if(null != readTexture) {
+                if(newData) {
+                    readTexture.updateImage(gl, readTextureData);
+                } else {
+                    readTexture.updateSubImage(gl, readTextureData, 0, 
+                                               0, 0, // src offset
+                                               0, 0, // dst offset
+                                               drawable.getWidth(), drawable.getHeight());
+                }
+                readPixelBuffer.rewind();
+            }
+            psm.restore(gl);
+        }
+    }
+
+    public void dispose(GL gl) {  
+        if(null != readTexture) {
+            readTexture.destroy(gl);
+            readTextureData = null;
+        }
+        if(null != readPixelBuffer) {
+            readPixelBuffer.clear();
+            readPixelBuffer = null;
+        }
+        readPixelSizeLast = 0;
+    }
+
+}
+
diff --git a/src/jogl/classes/com/jogamp/opengl/util/StreamUtil.java b/src/jogl/classes/com/jogamp/opengl/util/StreamUtil.java
deleted file mode 100644
index 4cf8cb1f0..000000000
--- a/src/jogl/classes/com/jogamp/opengl/util/StreamUtil.java
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * 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;
-
-import java.io.*;
-import java.nio.*;
-
-/** Utilities for dealing with streams. */
-
-public class StreamUtil {
-    private StreamUtil() {}
-
-    public static byte[] readAll2Array(InputStream stream) throws IOException {
-        BytesRead bytesRead = readAllImpl(stream);
-        byte[] data = bytesRead.data;
-        if (bytesRead.payloadLen != data.length) {
-            data = new byte[bytesRead.payloadLen];
-            System.arraycopy(bytesRead.data, 0, data, 0, bytesRead.payloadLen);
-        }
-        return data;
-    }
-
-    public static ByteBuffer readAll2Buffer(InputStream stream) throws IOException {
-        BytesRead bytesRead = readAllImpl(stream);
-        return GLBuffers.newDirectByteBuffer(bytesRead.data, 0, bytesRead.payloadLen);
-    }
-
-    private static BytesRead readAllImpl(InputStream stream) throws IOException {
-        // FIXME: Shall we do this here ?
-        if( !(stream instanceof BufferedInputStream) ) {
-            stream = new BufferedInputStream(stream);
-        }
-        int avail = stream.available();
-        byte[] data = new byte[avail];
-        int numRead = 0;
-        int pos = 0;
-        do {
-            if (pos + avail > data.length) {
-                byte[] newData = new byte[pos + avail];
-                System.arraycopy(data, 0, newData, 0, pos);
-                data = newData;
-            }
-            numRead = stream.read(data, pos, avail);
-            if (numRead >= 0) {
-                pos += numRead;
-            }
-            avail = stream.available();
-        } while (avail > 0 && numRead >= 0);
-
-        return new BytesRead(pos, data);
-    }
-
-    private static class BytesRead {
-        BytesRead(int payloadLen, byte[] data) {
-            this.payloadLen=payloadLen;
-            this.data=data;
-        }
-        int payloadLen;
-        byte[] data;
-    }
-}
diff --git a/src/jogl/classes/com/jogamp/opengl/util/awt/Screenshot.java b/src/jogl/classes/com/jogamp/opengl/util/awt/Screenshot.java
index 7019d720f..fa66673fd 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/awt/Screenshot.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/awt/Screenshot.java
@@ -36,17 +36,20 @@
 
 package com.jogamp.opengl.util.awt;
 
-import java.awt.image.*;
-import java.io.*;
-import java.nio.*;
-import java.nio.channels.*;
-import javax.imageio.*;
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferByte;
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
 
-import javax.media.opengl.*;
-import javax.media.opengl.glu.*;
-import javax.media.opengl.glu.gl2.*;
+import javax.imageio.ImageIO;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GLException;
+import javax.media.opengl.glu.gl2.GLUgl2;
 
-import com.jogamp.opengl.util.*;
+import com.jogamp.common.util.IOUtil;
+import com.jogamp.opengl.util.GLPixelStorageModes;
+import com.jogamp.opengl.util.TGAWriter;
 
 /** Utilities for taking screenshots of OpenGL applications. */
 
@@ -148,8 +151,8 @@ public class Screenshot {
     GL2 gl = GLUgl2.getCurrentGL2();
 
     // Set up pixel storage modes
-    PixelStorageModes psm = new PixelStorageModes();
-    psm.save(gl);
+    GLPixelStorageModes psm = new GLPixelStorageModes();
+    psm.setPackAlignment(gl, 1);
 
     int readbackType = (alpha ? GL2.GL_ABGR_EXT : GL2.GL_BGR);
 
@@ -255,8 +258,8 @@ public class Screenshot {
     GL2 gl = GLUgl2.getCurrentGL2();
 
     // Set up pixel storage modes
-    PixelStorageModes psm = new PixelStorageModes();
-    psm.save(gl);
+    GLPixelStorageModes psm = new GLPixelStorageModes();
+    psm.setPackAlignment(gl, 1);
 
     // read the BGR values into the image
     gl.glReadPixels(x, y, width, height, readbackType,
@@ -375,7 +378,7 @@ public class Screenshot {
                                  int width,
                                  int height,
                                  boolean alpha) throws IOException, GLException {
-    String fileSuffix = FileUtil.getFileSuffix(file);
+    String fileSuffix = IOUtil.getFileSuffix(file);
     if (alpha && (fileSuffix.equals("jpg") || fileSuffix.equals("jpeg"))) {
       // JPEGs can't deal properly with alpha channels
       alpha = false;
@@ -387,46 +390,10 @@ public class Screenshot {
     }
   }
 
-  private static int glGetInteger(GL2 gl, int pname, int[] tmp) {
-    gl.glGetIntegerv(pname, tmp, 0);
-    return tmp[0];
-  }
-
   private static void checkExtABGR() {
     GL2 gl = GLUgl2.getCurrentGL2();
     if (!gl.isExtensionAvailable("GL_EXT_abgr")) {
       throw new IllegalArgumentException("Saving alpha channel requires GL_EXT_abgr");
     }
-  }
- 
-  static class PixelStorageModes {
-    int packAlignment;
-    int packRowLength;
-    int packSkipRows;
-    int packSkipPixels;
-    int packSwapBytes;
-    int[] tmp = new int[1];
-
-    void save(GL2 gl) {
-      packAlignment  = glGetInteger(gl, GL2.GL_PACK_ALIGNMENT, tmp);
-      packRowLength  = glGetInteger(gl, GL2.GL_PACK_ROW_LENGTH, tmp);
-      packSkipRows   = glGetInteger(gl, GL2.GL_PACK_SKIP_ROWS, tmp);
-      packSkipPixels = glGetInteger(gl, GL2.GL_PACK_SKIP_PIXELS, tmp);
-      packSwapBytes  = glGetInteger(gl, GL2.GL_PACK_SWAP_BYTES, tmp);
-
-      gl.glPixelStorei(GL2.GL_PACK_ALIGNMENT, 1);
-      gl.glPixelStorei(GL2.GL_PACK_ROW_LENGTH, 0);
-      gl.glPixelStorei(GL2.GL_PACK_SKIP_ROWS, 0);
-      gl.glPixelStorei(GL2.GL_PACK_SKIP_PIXELS, 0);
-      gl.glPixelStorei(GL2.GL_PACK_SWAP_BYTES, 0);
-    }
-
-    void restore(GL2 gl) {
-      gl.glPixelStorei(GL2.GL_PACK_ALIGNMENT, packAlignment);
-      gl.glPixelStorei(GL2.GL_PACK_ROW_LENGTH, packRowLength);
-      gl.glPixelStorei(GL2.GL_PACK_SKIP_ROWS, packSkipRows);
-      gl.glPixelStorei(GL2.GL_PACK_SKIP_PIXELS, packSkipPixels);
-      gl.glPixelStorei(GL2.GL_PACK_SWAP_BYTES, packSwapBytes);
-    }
-  }
+  } 
 }
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
index ad17dd288..be3a1de73 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
@@ -29,6 +29,8 @@
 package com.jogamp.opengl.util.glsl;
 
 import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.util.IOUtil;
+
 import javax.media.opengl.*;
 import com.jogamp.opengl.util.*;
 import jogamp.opengl.Debug;
@@ -350,7 +352,7 @@ public class ShaderCode {
             if (url == null) {
                 return null;
             }
-            return StreamUtil.readAll2Buffer(new BufferedInputStream(url.openStream()));
+            return IOUtil.copyStream2ByteBuffer( new BufferedInputStream( url.openStream() ) );
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/Texture.java b/src/jogl/classes/com/jogamp/opengl/util/texture/Texture.java
index 35604ba30..08f56ef27 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/Texture.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/Texture.java
@@ -43,7 +43,6 @@ import javax.media.opengl.*;
 import javax.media.opengl.glu.*;
 import javax.media.nativewindow.NativeWindowFactory;
 import jogamp.opengl.*;
-import com.jogamp.opengl.util.texture.*;
 import com.jogamp.opengl.util.texture.spi.*;
 
 /**
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureData.java b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureData.java
index f598422bf..149a2d46c 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureData.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureData.java
@@ -36,10 +36,11 @@
 
 package com.jogamp.opengl.util.texture;
 
-import java.nio.*;
+import java.nio.Buffer;
 
-import javax.media.opengl.*;
-import com.jogamp.opengl.util.*;
+import javax.media.opengl.GLProfile;
+
+import com.jogamp.opengl.util.GLBuffers;
 
 /**
  * Represents the data for an OpenGL texture. This is separated from
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java
index 792f80ff8..5be7f922b 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
+ * Copyright (c) 2011 JogAmp Community. All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -39,16 +40,33 @@
 
 package com.jogamp.opengl.util.texture;
 
-import java.io.*;
-import java.net.*;
-import java.nio.*;
-import java.util.*;
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLProfile;
 
-import javax.media.opengl.*;
-import javax.media.opengl.glu.*;
 import jogamp.opengl.Debug;
-import com.jogamp.opengl.util.*;
-import com.jogamp.opengl.util.texture.spi.*;
+
+import com.jogamp.common.util.IOUtil;
+import com.jogamp.opengl.util.texture.spi.DDSImage;
+import com.jogamp.opengl.util.texture.spi.NetPbmTextureWriter;
+import com.jogamp.opengl.util.texture.spi.SGIImage;
+import com.jogamp.opengl.util.texture.spi.TGAImage;
+import com.jogamp.opengl.util.texture.spi.TextureProvider;
+import com.jogamp.opengl.util.texture.spi.TextureWriter;
 
 /** <P> Provides input and output facilities for both loading OpenGL
     textures from disk and streams as well as writing textures already
@@ -177,7 +195,7 @@ public class TextureIO {
                                              boolean mipmap,
                                              String fileSuffix) throws IOException {
         if (fileSuffix == null) {
-            fileSuffix = FileUtil.getFileSuffix(file);
+            fileSuffix = IOUtil.getFileSuffix(file);
         }
         return newTextureDataImpl(glp, file, 0, 0, mipmap, fileSuffix);
     }
@@ -234,7 +252,7 @@ public class TextureIO {
                                              boolean mipmap,
                                              String fileSuffix) throws IOException {
         if (fileSuffix == null) {
-            fileSuffix = FileUtil.getFileSuffix(url.getPath());
+            fileSuffix = IOUtil.getFileSuffix(url.getPath());
         }
         return newTextureDataImpl(glp, url, 0, 0, mipmap, fileSuffix);
     }
@@ -288,7 +306,7 @@ public class TextureIO {
         }
 
         if (fileSuffix == null) {
-            fileSuffix = FileUtil.getFileSuffix(file);
+            fileSuffix = IOUtil.getFileSuffix(file);
         }
 
         return newTextureDataImpl(glp, file, internalFormat, pixelFormat, mipmap, fileSuffix);
@@ -380,7 +398,7 @@ public class TextureIO {
         }
 
         if (fileSuffix == null) {
-            fileSuffix = FileUtil.getFileSuffix(url.getPath());
+            fileSuffix = IOUtil.getFileSuffix(url.getPath());
         }
 
         return newTextureDataImpl(glp, url, internalFormat, pixelFormat, mipmap, fileSuffix);
@@ -437,7 +455,7 @@ public class TextureIO {
     public static Texture newTexture(File file, boolean mipmap) throws IOException, GLException {
         GL gl = GLContext.getCurrentGL();
         GLProfile glp = gl.getGLProfile();
-        TextureData data = newTextureData(glp, file, mipmap, FileUtil.getFileSuffix(file));
+        TextureData data = newTextureData(glp, file, mipmap, IOUtil.getFileSuffix(file));
         Texture texture = newTexture(gl, data);
         data.flush();
         return texture;
@@ -494,7 +512,7 @@ public class TextureIO {
      */
     public static Texture newTexture(URL url, boolean mipmap, String fileSuffix) throws IOException, GLException {
         if (fileSuffix == null) {
-            fileSuffix = FileUtil.getFileSuffix(url.getPath());
+            fileSuffix = IOUtil.getFileSuffix(url.getPath());
         }
         GL gl = GLContext.getCurrentGL();
         GLProfile glp = gl.getGLProfile();
@@ -878,7 +896,7 @@ public class TextureIO {
                                           boolean mipmap,
                                           String fileSuffix) throws IOException {
             if (DDS.equals(fileSuffix) ||
-                DDS.equals(FileUtil.getFileSuffix(file))) {
+                DDS.equals(IOUtil.getFileSuffix(file))) {
                 DDSImage image = DDSImage.read(file);
                 return newTextureData(glp, image, internalFormat, pixelFormat, mipmap);
             }
@@ -893,7 +911,7 @@ public class TextureIO {
                                           String fileSuffix) throws IOException {
             if (DDS.equals(fileSuffix) ||
                 DDSImage.isDDSImage(stream)) {
-                byte[] data = StreamUtil.readAll2Array(stream);
+                byte[] data = IOUtil.copyStream2ByteArray(stream);
                 ByteBuffer buf = ByteBuffer.wrap(data);
                 DDSImage image = DDSImage.read(buf);
                 return newTextureData(glp, image, internalFormat, pixelFormat, mipmap);
@@ -1014,7 +1032,7 @@ public class TextureIO {
                                       internalFormat,
                                       pixelFormat,
                                       mipmap,
-                                      ((fileSuffix != null) ? fileSuffix : FileUtil.getFileSuffix(file)));
+                                      ((fileSuffix != null) ? fileSuffix : IOUtil.getFileSuffix(file)));
             } finally {
                 inStream.close();
             }
@@ -1113,7 +1131,7 @@ public class TextureIO {
     static class DDSTextureWriter implements TextureWriter {
         public boolean write(File file,
                              TextureData data) throws IOException {
-            if (DDS.equals(FileUtil.getFileSuffix(file))) {
+            if (DDS.equals(IOUtil.getFileSuffix(file))) {
                 // See whether the DDS writer can handle this TextureData
                 int pixelFormat = data.getPixelFormat();
                 int pixelType   = data.getPixelType();
@@ -1162,7 +1180,7 @@ public class TextureIO {
     static class SGITextureWriter implements TextureWriter {
         public boolean write(File file,
                              TextureData data) throws IOException {
-            String fileSuffix = FileUtil.getFileSuffix(file);
+            String fileSuffix = IOUtil.getFileSuffix(file);
             if (SGI.equals(fileSuffix) ||
                 SGI_RGB.equals(fileSuffix)) {
                 // See whether the SGI writer can handle this TextureData
@@ -1206,7 +1224,7 @@ public class TextureIO {
     static class TGATextureWriter implements TextureWriter {
         public boolean write(File file,
                              TextureData data) throws IOException {
-            if (TGA.equals(FileUtil.getFileSuffix(file))) {
+            if (TGA.equals(IOUtil.getFileSuffix(file))) {
                 // See whether the TGA writer can handle this TextureData
                 int pixelFormat = data.getPixelFormat();
                 int pixelType   = data.getPixelType();
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/spi/NetPbmTextureWriter.java b/src/jogl/classes/com/jogamp/opengl/util/texture/spi/NetPbmTextureWriter.java
index 499dce7fb..ae9618490 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/spi/NetPbmTextureWriter.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/spi/NetPbmTextureWriter.java
@@ -40,13 +40,12 @@
 package com.jogamp.opengl.util.texture.spi;
 
 import java.io.*;
-import java.net.*;
 import java.nio.*;
 
 import javax.media.opengl.*;
-import com.jogamp.opengl.util.*;
+
+import com.jogamp.common.util.IOUtil;
 import com.jogamp.opengl.util.texture.*;
-import com.jogamp.opengl.util.texture.spi.*;
 
 public class NetPbmTextureWriter implements TextureWriter {
     int magic;
@@ -87,17 +86,17 @@ public class NetPbmTextureWriter implements TextureWriter {
 
         // file suffix selection 
         if (0==magic) {
-            if (PPM.equals(FileUtil.getFileSuffix(file))) {
+            if (PPM.equals(IOUtil.getFileSuffix(file))) {
                 magic = 6;
-            } else if (PAM.equals(FileUtil.getFileSuffix(file))) {
+            } else if (PAM.equals(IOUtil.getFileSuffix(file))) {
                 magic = 7;
             } else {
                 return false;
             }
         }
 
-        int pixelFormat = data.getPixelFormat();
-        int pixelType   = data.getPixelType();
+        final int pixelFormat = data.getPixelFormat();
+        final int pixelType   = data.getPixelType();
         if ((pixelFormat == GL.GL_RGB ||
              pixelFormat == GL.GL_RGBA) &&
             (pixelType == GL.GL_BYTE ||
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/spi/awt/IIOTextureWriter.java b/src/jogl/classes/com/jogamp/opengl/util/texture/spi/awt/IIOTextureWriter.java
index 405211204..89d0d20a1 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/spi/awt/IIOTextureWriter.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/spi/awt/IIOTextureWriter.java
@@ -42,12 +42,12 @@ package com.jogamp.opengl.util.texture.spi.awt;
 import java.awt.Graphics;
 import java.awt.image.*;
 import java.io.*;
-import java.net.*;
 import java.nio.*;
 import javax.imageio.*;
 
 import javax.media.opengl.*;
-import com.jogamp.opengl.util.*;
+
+import com.jogamp.common.util.IOUtil;
 import com.jogamp.opengl.util.awt.*;
 import com.jogamp.opengl.util.texture.*;
 import com.jogamp.opengl.util.texture.spi.*;
@@ -101,7 +101,7 @@ public class IIOTextureWriter implements TextureWriter {
             ImageUtil.flipImageVertically(image);
 
             // Happened to notice that writing RGBA images to JPEGS is broken
-            if (TextureIO.JPG.equals(FileUtil.getFileSuffix(file)) &&
+            if (TextureIO.JPG.equals(IOUtil.getFileSuffix(file)) &&
                 image.getType() == BufferedImage.TYPE_4BYTE_ABGR) {
                 BufferedImage tmpImage = new BufferedImage(image.getWidth(), image.getHeight(),
                                                            BufferedImage.TYPE_3BYTE_BGR);
@@ -111,7 +111,7 @@ public class IIOTextureWriter implements TextureWriter {
                 image = tmpImage;
             }
 
-            return ImageIO.write(image, FileUtil.getFileSuffix(file), file);
+            return ImageIO.write(image, IOUtil.getFileSuffix(file), file);
         }
       
         throw new IOException("ImageIO writer doesn't support this pixel format / type (only GL_RGB/A + bytes)");
diff --git a/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java b/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java
index 179e4ed2c..cb0d1a372 100644
--- a/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java
+++ b/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java
@@ -56,7 +56,7 @@ public class TypecastFontConstructor implements FontConstructor  {
     
     public Font create(URL furl) throws IOException {
         final File tf  = File.createTempFile( "joglfont", ".ttf");
-        final int len = IOUtil.copyURLToFile(furl, tf);
+        final int len = IOUtil.copyURL2File(furl, tf);
         if(len==0) {
             tf.delete();
             throw new GLException("Font of stream "+furl+" was zero bytes");
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/GPURendererListenerBase01.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/GPURendererListenerBase01.java
index 9587a672d..ed6bb3cde 100644
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/GPURendererListenerBase01.java
+++ b/src/test/com/jogamp/opengl/test/junit/graph/demos/GPURendererListenerBase01.java
@@ -27,6 +27,7 @@
  */
 package com.jogamp.opengl.test.junit.graph.demos;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.StringWriter;
@@ -48,6 +49,7 @@ import com.jogamp.graph.curve.opengl.Renderer;
 import com.jogamp.newt.event.KeyEvent;
 import com.jogamp.newt.event.KeyListener;
 import com.jogamp.newt.opengl.GLWindow;
+import com.jogamp.opengl.util.GLReadBufferUtil;
 
 /**
  *
@@ -60,7 +62,7 @@ import com.jogamp.newt.opengl.GLWindow;
  * - s: screenshot
  */
 public abstract class GPURendererListenerBase01 implements GLEventListener {
-    private Screenshot screenshot;
+    private GLReadBufferUtil screenshot;
     private Renderer renderer;
     private int renderModes;
     private boolean debug;
@@ -88,7 +90,7 @@ public abstract class GPURendererListenerBase01 implements GLEventListener {
         this.renderModes = renderModes;
         this.debug = debug;
         this.trace = trace;
-        this.screenshot = new Screenshot();
+        this.screenshot = new GLReadBufferUtil(false, false);
     }
     
     public final Renderer getRenderer() { return renderer; }
@@ -191,8 +193,9 @@ public abstract class GPURendererListenerBase01 implements GLEventListener {
         PrintWriter pw = new PrintWriter(sw);
         pw.printf("-%03dx%03d-Z%04d-T%04d-%s", drawable.getWidth(), drawable.getHeight(), (int)Math.abs(zoom), texSize, objName);
         
-        String filename = dir + tech + sw +".tga";
-        screenshot.surface2File(drawable, filename /*, exportAlpha */);
+        final String filename = dir + tech + sw +".tga";
+        screenshot.readPixels(drawable.getGL(), drawable, false);
+        screenshot.write(new File(filename));
     }
     
     int screenshot_num = 0;
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/ReadBufferUtil.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/ReadBufferUtil.java
deleted file mode 100644
index dc1ea2da3..000000000
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/ReadBufferUtil.java
+++ /dev/null
@@ -1,108 +0,0 @@
-/**
- * Copyright 2010 JogAmp Community. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification, are
- * permitted provided that the following conditions are met:
- * 
- *    1. Redistributions of source code must retain the above copyright notice, this list of
- *       conditions and the following disclaimer.
- * 
- *    2. Redistributions 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.
- * 
- * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
- * The views and conclusions contained in the software and documentation are those of the
- * authors and should not be interpreted as representing official policies, either expressed
- * or implied, of JogAmp Community.
- */
- 
-package com.jogamp.opengl.test.junit.graph.demos;
-
-import com.jogamp.opengl.util.GLBuffers;
-import java.nio.*;
-import javax.media.opengl.*;
-
-import com.jogamp.opengl.util.texture.Texture;
-import com.jogamp.opengl.util.texture.TextureData;
-
-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 = GLBuffers.newDirectGLBuffer(GL.GL_UNSIGNED_BYTE, readPixelSize);
-            readPixelSizeLast = readPixelSize ;
-            try {
-                readTextureData = new TextureData(
-                           gl.getGLProfile(),
-                           // gl.isGL2GL3()?gl.GL_RGBA:gl.GL_RGB,
-                           GL.GL_RGB,
-                           drawable.getWidth(), drawable.getHeight(),
-                           0, 
-                           GL.GL_RGB,
-                           GL.GL_UNSIGNED_BYTE,
-                           false, false, 
-                           false /* flip */,
-                           readPixelBuffer,
-                           null /* Flusher */);
-                newData = true;
-            } catch (Exception e) {
-                readTextureData = null;
-                readPixelBuffer = null;
-                readPixelSizeLast = 0;
-                throw new RuntimeException("can not fetch offscreen texture", e);
-            }
-        }
-        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(gl, readTextureData);
-            } else {
-                readTexture.updateSubImage(gl, readTextureData, 0, 
-                                           0, 0, // src offset
-                                           0, 0, // dst offset
-                                           drawable.getWidth(), drawable.getHeight());
-            }
-            readPixelBuffer.rewind();
-        }
-    }
-
-    public void dispose(GL gl) {        
-        readTexture.destroy(gl);
-        readTextureData = null;
-        if(null != readPixelBuffer) {
-            readPixelBuffer.clear();
-            readPixelBuffer = null;
-        }
-        readPixelSizeLast = 0;
-    }
-
-}
-
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/Screenshot.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/Screenshot.java
deleted file mode 100644
index f4b6f6dd9..000000000
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/Screenshot.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package com.jogamp.opengl.test.junit.graph.demos;
-
-import java.io.File;
-import java.io.IOException;
-
-import javax.media.opengl.GL;
-import javax.media.opengl.GLAutoDrawable;
-
-import com.jogamp.opengl.util.texture.TextureIO;
-
-public class Screenshot {
-
-    ReadBufferUtil readBufferUtil = new ReadBufferUtil();
-
-    public void dispose(GL gl) {
-        readBufferUtil.dispose(gl);
-    }
-
-    public void surface2File(GLAutoDrawable drawable, String filename) {
-        GL gl = drawable.getGL();
-        // FIXME glFinish() is an expensive paranoia sync, should not be necessary due to spec
-        gl.glFinish();
-        readBufferUtil.fetchOffscreenTexture(drawable, gl);
-        gl.glFinish();
-        try {
-            surface2File(filename);
-        } catch (IOException ex) {
-            throw new RuntimeException("can not write survace to file", ex);
-        }
-    }
-
-    void surface2File(String filename) throws IOException {
-        File file = new File(filename);
-        TextureIO.write(readBufferUtil.getTextureData(), file);
-        System.err.println("Wrote: " + file.getAbsolutePath() + ", ...");
-        readBufferUtil.rewindPixelBuffer();
-    }
-    
-}
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/UIListenerBase01.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/UIListenerBase01.java
index df2dca4fb..b89f87be4 100644
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/UIListenerBase01.java
+++ b/src/test/com/jogamp/opengl/test/junit/graph/demos/ui/UIListenerBase01.java
@@ -27,6 +27,7 @@
  */
 package com.jogamp.opengl.test.junit.graph.demos.ui;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.StringWriter;
@@ -41,13 +42,12 @@ import javax.media.opengl.GLPipelineFactory;
 import javax.media.opengl.GLRunnable;
 
 import com.jogamp.graph.curve.opengl.RegionRenderer;
-import com.jogamp.graph.curve.opengl.TextRenderer;
 import com.jogamp.newt.event.KeyEvent;
 import com.jogamp.newt.event.KeyListener;
 import com.jogamp.newt.event.MouseEvent;
 import com.jogamp.newt.event.MouseListener;
 import com.jogamp.newt.opengl.GLWindow;
-import com.jogamp.opengl.test.junit.graph.demos.Screenshot;
+import com.jogamp.opengl.util.GLReadBufferUtil;
 
 /**
  *
@@ -60,7 +60,7 @@ import com.jogamp.opengl.test.junit.graph.demos.Screenshot;
  * - s: screenshot
  */
 public abstract class UIListenerBase01 implements GLEventListener {
-    private Screenshot screenshot;
+    private GLReadBufferUtil screenshot;
     private RegionRenderer rRenderer;
     private boolean debug;
     private boolean trace;
@@ -85,7 +85,7 @@ public abstract class UIListenerBase01 implements GLEventListener {
         this.rRenderer = rRenderer;
         this.debug = debug;
         this.trace = trace;
-        this.screenshot = new Screenshot();
+        this.screenshot = new GLReadBufferUtil(false, false);
     }
     
     public final RegionRenderer getRegionRenderer() { return rRenderer; }
@@ -179,8 +179,9 @@ public abstract class UIListenerBase01 implements GLEventListener {
         PrintWriter pw = new PrintWriter(sw);
         pw.printf("-%03dx%03d-Z%04d-T%04d-%s", drawable.getWidth(), drawable.getHeight(), (int)Math.abs(zoom), 0, objName);
         
-        String filename = dir + tech + sw +".tga";
-        screenshot.surface2File(drawable, filename /*, exportAlpha */);
+        final String filename = dir + tech + sw +".tga";
+        screenshot.readPixels(drawable.getGL(), drawable, false);
+        screenshot.write(new File(filename));
     }
     
     int screenshot_num = 0;
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2File.java b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2File.java
index 95e7d6e53..b829c8deb 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2File.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2File.java
@@ -37,7 +37,7 @@ import java.io.File;
 public class ReadBuffer2File extends ReadBufferBase {
 
     public ReadBuffer2File(GLDrawable externalRead) {
-        super(externalRead);
+        super(externalRead, false);
     }
 
     @Override
@@ -52,10 +52,9 @@ public class ReadBuffer2File extends ReadBufferBase {
         }
 
         File file = File.createTempFile("shot" + shotNum + "-", ".ppm");
-        TextureIO.write(readBufferUtil.getTextureData(), file);
+        readBufferUtil.write(file);
         System.out.println("Wrote: " + file.getAbsolutePath() + ", ...");
         shotNum++;
-        readBufferUtil.rewindPixelBuffer();
     }
 
     @Override
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2Screen.java b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2Screen.java
index 23271dde2..8c315e97f 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2Screen.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBuffer2Screen.java
@@ -47,7 +47,7 @@ public class ReadBuffer2Screen extends ReadBufferBase {
     boolean enableBufferVBO    = true; // FIXME
 
     public ReadBuffer2Screen (GLDrawable externalRead) {
-        super(externalRead);
+        super(externalRead, true);
     }
 
     @Override
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferBase.java b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferBase.java
index 53675bc31..e3ca25ae6 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferBase.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferBase.java
@@ -30,16 +30,19 @@ package com.jogamp.opengl.test.junit.jogl.offscreen;
 
 import javax.media.opengl.*;
 
+import com.jogamp.opengl.util.GLReadBufferUtil;
+
 public class ReadBufferBase implements GLEventListener {
     public boolean glDebug = false ;
     public boolean glTrace = false ;
 
     protected GLDrawable externalRead;
 
-    ReadBufferUtil readBufferUtil = new ReadBufferUtil();
+    GLReadBufferUtil readBufferUtil;
 
-    public ReadBufferBase (GLDrawable externalRead) {
+    public ReadBufferBase (GLDrawable externalRead, boolean write2Texture) {
         this.externalRead = externalRead ;
+        this.readBufferUtil = new GLReadBufferUtil(false, write2Texture);
     }
 
     public void init(GLAutoDrawable drawable) {
@@ -84,7 +87,7 @@ public class ReadBufferBase implements GLEventListener {
     public void display(GLAutoDrawable drawable) {
         GL gl = drawable.getGL();
 
-        readBufferUtil.fetchOffscreenTexture(drawable, gl);
+        readBufferUtil.readPixels(gl, drawable, false);
     }
 
 }
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferUtil.java b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferUtil.java
deleted file mode 100644
index 5a2c73cf4..000000000
--- a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/ReadBufferUtil.java
+++ /dev/null
@@ -1,106 +0,0 @@
-/**
- * Copyright 2010 JogAmp Community. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification, are
- * permitted provided that the following conditions are met:
- * 
- *    1. Redistributions of source code must retain the above copyright notice, this list of
- *       conditions and the following disclaimer.
- * 
- *    2. Redistributions 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.
- * 
- * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
- * The views and conclusions contained in the software and documentation are those of the
- * authors and should not be interpreted as representing official policies, either expressed
- * or implied, of JogAmp Community.
- */
- 
-package com.jogamp.opengl.test.junit.jogl.offscreen;
-
-import com.jogamp.opengl.util.GLBuffers;
-import java.nio.*;
-import javax.media.opengl.*;
-
-import com.jogamp.opengl.util.texture.Texture;
-import com.jogamp.opengl.util.texture.TextureData;
-
-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 = GLBuffers.newDirectGLBuffer(GL.GL_UNSIGNED_BYTE, readPixelSize);
-            readPixelSizeLast = readPixelSize ;
-            try {
-                readTextureData = new TextureData(
-                           gl.getGLProfile(),
-                           // gl.isGL2GL3()?gl.GL_RGBA:gl.GL_RGB,
-                           gl.GL_RGB,
-                           drawable.getWidth(), drawable.getHeight(),
-                           0, 
-                           gl.GL_RGB,
-                           gl.GL_UNSIGNED_BYTE,
-                           false, false, 
-                           false /* flip */,
-                           readPixelBuffer,
-                           null /* Flusher */);
-                newData = true;
-            } catch (Exception e) {
-                readTextureData = null;
-                readPixelBuffer = null;
-                readPixelSizeLast = 0;
-                throw new RuntimeException("can not fetch offscreen texture", e);
-            }
-        }
-        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(gl, readTextureData);
-            } else {
-                readTexture.updateSubImage(gl, readTextureData, 0, 
-                                           0, 0, // src offset
-                                           0, 0, // dst offset
-                                           drawable.getWidth(), drawable.getHeight());
-            }
-            readPixelBuffer.rewind();
-        }
-    }
-
-    public void dispose(GL gl) {
-        readTexture.destroy(gl);
-        readTextureData = null;
-        readPixelBuffer.clear();
-        readPixelBuffer = null;
-        readPixelSizeLast = 0;
-    }
-
-}
-
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/Surface2File.java b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/Surface2File.java
index 77fd40181..8ca1f3ef8 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/Surface2File.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/offscreen/Surface2File.java
@@ -30,6 +30,7 @@ package com.jogamp.opengl.test.junit.jogl.offscreen;
 
 import javax.media.opengl.*;
 
+import com.jogamp.opengl.util.GLReadBufferUtil;
 import com.jogamp.opengl.util.texture.TextureIO;
 
 import java.io.File;
@@ -39,7 +40,7 @@ import javax.media.nativewindow.*;
 
 public class Surface2File implements SurfaceUpdatedListener {
 
-    ReadBufferUtil readBufferUtil = new ReadBufferUtil();
+    GLReadBufferUtil readBufferUtil = new GLReadBufferUtil(false, false);
     int shotNum = 0;
 
     public void dispose(GL gl) {
@@ -54,7 +55,7 @@ public class Surface2File implements SurfaceUpdatedListener {
                 GL gl = ctx.getGL();
                 // FIXME glFinish() is an expensive paranoia sync, should not be necessary due to spec
                 gl.glFinish();
-                readBufferUtil.fetchOffscreenTexture(drawable, gl);
+                readBufferUtil.readPixels(gl, drawable, false);
                 gl.glFinish();
                 try {
                     surface2File("shot");
@@ -71,9 +72,8 @@ public class Surface2File implements SurfaceUpdatedListener {
         }
 
         File file = File.createTempFile(basename + shotNum + "-", ".ppm");
-        TextureIO.write(readBufferUtil.getTextureData(), file);
+        readBufferUtil.write(file);
         System.err.println("Wrote: " + file.getAbsolutePath() + ", ...");
         shotNum++;
-        readBufferUtil.rewindPixelBuffer();
     }
 }