initial import of CLSubBuffer to HLB.

1 files changed, 57 insertions, 0 deletions

diff --git a/src/com/jogamp/opencl/CLSubBuffer.java b/src/com/jogamp/opencl/CLSubBuffer.java
new file mode 100644
index 00000000..614dfa80
--- /dev/null
+++ b/src/com/jogamp/opencl/CLSubBuffer.java
@@ -0,0 +1,57 @@
+package com.jogamp.opencl;
+
+import com.jogamp.opencl.CLMemory.Mem;
+import java.nio.Buffer;
+
+/**
+ * A sub buffer of a CLBuffer.
+ * @author Michael Bien
+ */
+public class CLSubBuffer<B extends Buffer> extends CLBuffer<B> {
+
+    private CLBuffer<B> parent;
+    private final int offset;
+
+    CLSubBuffer(CLBuffer<B> parent, int origin, B directBuffer, long id, int flags) {
+        super(parent.getContext(), directBuffer, id, flags);
+        this.parent = parent;
+        this.offset = origin;
+    }
+
+    /**
+     * Throws an UnsupportedOperationException since creating sub buffers
+     * from sub buffers is not allowed.
+     */
+    @Override
+    public CLBuffer<B> createSubBuffer(int origin, int size, Mem... flags) {
+        throw new UnsupportedOperationException("creating sub buffers from sub buffers is not allowed.");
+    }
+
+    @Override
+    public void release() {
+        parent.onReleaseSubBuffer(this);
+        super.release();
+    }
+
+    /**
+     * Returns the parent buffer this buffer was created from.
+     */
+    public CLBuffer<B> getParent() {
+        return parent;
+    }
+
+    /**
+     * Returns the offset of this sub buffer to its parent.
+     */
+    public int getOffset() {
+        return offset;
+    }
+
+    /**
+     * Returns true.
+     */
+    @Override
+    public boolean isSubBuffer() {
+        return true;
+    }
+}