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-rw-r--r--src/net/java/games/jogl/util/BufferUtils.java15
1 files changed, 14 insertions, 1 deletions
diff --git a/src/net/java/games/jogl/util/BufferUtils.java b/src/net/java/games/jogl/util/BufferUtils.java
index 05125b75e..88afa1c8f 100644
--- a/src/net/java/games/jogl/util/BufferUtils.java
+++ b/src/net/java/games/jogl/util/BufferUtils.java
@@ -40,6 +40,7 @@
package net.java.games.jogl.util;
import java.nio.*;
+import java.util.*;
/** Utility routines for dealing with direct buffers. */
@@ -70,6 +71,8 @@ public class BufferUtils {
return dest;
}
+ private static Map bufferOffsetCache = Collections.synchronizedMap(new HashMap());
+
/** Creates an "offset buffer" for use with the
ARB_vertex_buffer_object extension. The resulting Buffers are
suitable for use with routines such as glVertexPointer <em>when
@@ -77,5 +80,15 @@ public class BufferUtils {
capacity and are not suitable for passing to OpenGL routines
that do not support buffer offsets, or to non-OpenGL
routines. */
- public static native ByteBuffer bufferOffset(int offset);
+ public static ByteBuffer bufferOffset(int offset) {
+ Integer key = new Integer(offset);
+ ByteBuffer buf = (ByteBuffer) bufferOffsetCache.get(key);
+ if (buf == null) {
+ buf = bufferOffset0(offset);
+ bufferOffsetCache.put(key, buf);
+ }
+ return buf;
+ }
+
+ private static native ByteBuffer bufferOffset0(int offset);
}