1 files changed, 88 insertions, 0 deletions
diff --git a/src/com/mbien/opencl/CLGLBuffer.java b/src/com/mbien/opencl/CLGLBuffer.java
new file mode 100644
index 00000000..566f45ec
--- /dev/null
+++ b/src/com/mbien/opencl/CLGLBuffer.java
@@ -0,0 +1,88 @@
+package com.mbien.opencl;
+
+import java.nio.Buffer;
+
+
+import static com.mbien.opencl.CLGLI.*;
+
+/**
+ * Shared buffer between OpenGL and OpenCL contexts.
+ * @author Michael Bien
+ */
+public final class CLGLBuffer<B extends Buffer> extends CLBuffer<B> {
+
+    private CLGLBuffer(CLContext context, B directBuffer, long id) {
+        super(context, directBuffer, id);
+    }
+
+
+    static <B extends Buffer> CLGLBuffer<B> create(CLContext context, B directBuffer, int flags, int glBuffer) {
+        if(directBuffer != null && !directBuffer.isDirect())
+            throw new IllegalArgumentException("buffer is not a direct buffer");
+
+        if(isHostPointerFlag(flags)) {
+            throw new IllegalArgumentException(
+                    "CL_MEM_COPY_HOST_PTR or CL_MEM_USE_HOST_PTR can not be used with OpenGL Buffers.");
+        }
+        
+        CL cl = context.cl;
+        int[] result = new int[1];
+        CLGLI clgli = (CLGLI)cl;
+        
+        long id = clgli.clCreateFromGLBuffer(context.ID, flags, glBuffer, result, 0);
+
+        return new CLGLBuffer<B>(context, directBuffer, id);
+    }
+
+    @Override
+    public <T extends Buffer> CLGLBuffer<T> cloneWith(T directBuffer) {
+        return new CLGLBuffer<T>(context, directBuffer, ID);
+    }
+
+    /**
+     * Returns the OpenGL buffer type of this shared buffer.
+     */
+    public GLObjectType getGLObjectType() {
+        int[] array = new int[1];
+        int ret = ((CLGLI)cl).clGetGLObjectInfo(ID, array, 0, null, 0);
+        CLException.checkForError(ret, "error while asking for gl object info");
+        return GLObjectType.valueOf(array[0]);
+    }
+
+    /**
+     * Returns the OpenGL object id of this shared buffer.
+     */
+    public int getGLObjectID() {
+        int[] array = new int[1];
+        int ret = ((CLGLI)cl).clGetGLObjectInfo(ID, null, 0, array, 0);
+        CLException.checkForError(ret, "error while asking for gl object info");
+        return array[0];
+    }
+
+    public enum GLObjectType {
+
+        GL_OBJECT_BUFFER(CL_GL_OBJECT_BUFFER),
+        GL_OBJECT_TEXTURE2D(CL_GL_OBJECT_TEXTURE2D),
+        GL_OBJECT_TEXTURE3D(CL_GL_OBJECT_TEXTURE3D),
+        GL_OBJECT_RENDERBUFFER(CL_GL_OBJECT_RENDERBUFFER);
+
+        public final int TYPE;
+
+        private GLObjectType(int type) {
+            this.TYPE = type;
+        }
+
+        public static GLObjectType valueOf(int type) {
+            if(type == CL_GL_OBJECT_BUFFER)
+                return GL_OBJECT_BUFFER;
+            else if(type == CL_GL_OBJECT_TEXTURE2D)
+                return GL_OBJECT_TEXTURE2D;
+            else if(type == CL_GL_OBJECT_TEXTURE3D)
+                return GL_OBJECT_TEXTURE3D;
+            else if(type == CL_GL_OBJECT_RENDERBUFFER)
+                return GL_OBJECT_RENDERBUFFER;
+            return null;
+        }
+    }
+
+}