1 files changed, 137 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLBuffers.java b/src/jogl/classes/com/jogamp/opengl/util/GLBuffers.java
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index 000000000..b49bb3364
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+++ b/src/jogl/classes/com/jogamp/opengl/util/GLBuffers.java
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+/*
+ * 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.
+ * 
+ * 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 com.jogamp.gluegen.runtime.Buffers;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GL2ES2;
+
+import java.nio.*;
+
+/**
+ * Utility routines for dealing with direct buffers.
+ * @author Kenneth Russel
+ * @author Michael Bien
+ */
+public class GLBuffers extends Buffers {
+
+    public static final int sizeOfGLType(int glType) {
+        switch (glType) {
+            case GL.GL_UNSIGNED_BYTE:
+                return SIZEOF_BYTE;
+            case GL.GL_BYTE:
+                return SIZEOF_BYTE;
+            case GL.GL_UNSIGNED_SHORT:
+                return SIZEOF_SHORT;
+            case GL.GL_SHORT:
+                return SIZEOF_SHORT;
+            case GL.GL_FLOAT:
+                return SIZEOF_FLOAT;
+            case GL.GL_FIXED:
+                return SIZEOF_INT;
+            case GL2ES2.GL_INT:
+                return SIZEOF_INT;
+            case GL2ES2.GL_UNSIGNED_INT:
+                return SIZEOF_INT;
+            case GL2.GL_DOUBLE:
+                return SIZEOF_DOUBLE;
+        }
+        return -1;
+    }
+
+    public static final Buffer newDirectGLBuffer(int glType, int numElements) {
+        switch (glType) {
+            case GL.GL_UNSIGNED_BYTE:
+            case GL.GL_BYTE:
+                return newDirectByteBuffer(numElements);
+            case GL.GL_UNSIGNED_SHORT:
+            case GL.GL_SHORT:
+                return newDirectShortBuffer(numElements);
+            case GL.GL_FLOAT:
+                return newDirectFloatBuffer(numElements);
+            case GL.GL_FIXED:
+            case GL2ES2.GL_INT:
+            case GL2ES2.GL_UNSIGNED_INT:
+                return newDirectIntBuffer(numElements);
+            case GL2.GL_DOUBLE:
+                return newDirectDoubleBuffer(numElements);
+        }
+        return null;
+    }
+
+    public static final Buffer sliceGLBuffer(ByteBuffer parent, int bytePos, int byteLen, int glType) {
+        if (parent == null || byteLen == 0) {
+            return null;
+        }
+        parent.position(bytePos);
+        parent.limit(bytePos + byteLen);
+
+        switch (glType) {
+            case GL.GL_UNSIGNED_BYTE:
+            case GL.GL_BYTE:
+                return parent.slice();
+            case GL.GL_UNSIGNED_SHORT:
+            case GL.GL_SHORT:
+                return parent.asShortBuffer();
+            case GL.GL_FLOAT:
+                return parent.asFloatBuffer();
+            case GL.GL_FIXED:
+            case GL2ES2.GL_INT:
+            case GL2ES2.GL_UNSIGNED_INT:
+                return parent.asIntBuffer();
+            case GL2.GL_DOUBLE:
+                return parent.asDoubleBuffer();
+        }
+        return null;
+    }
+
+    //----------------------------------------------------------------------
+    // Conversion routines
+    //
+    public final static float[] getFloatArray(double[] source) {
+        int i = source.length;
+        float[] dest = new float[i--];
+        while (i >= 0) {
+            dest[i] = (float) source[i];
+            i--;
+        }
+        return dest;
+    }
+}