3 files changed, 39 insertions, 16 deletions
diff --git a/src/com/mbien/opencl/CLCommandQueue.java b/src/com/mbien/opencl/CLCommandQueue.java
index 1a98db6e..d1273633 100644
--- a/src/com/mbien/opencl/CLCommandQueue.java
+++ b/src/com/mbien/opencl/CLCommandQueue.java
@@ -29,7 +29,7 @@ public class CLCommandQueue implements CLResource {
     private long properties;
 
     /*
-     * Those direct memory buffers are used to pass data between the JVM and OpenCL.
+     * Those direct memory buffers are used to move data between the JVM and OpenCL.
      */
     private final PointerBuffer bufferA;
     private final PointerBuffer bufferB;
@@ -150,8 +150,10 @@ public class CLCommandQueue implements CLResource {
     public CLCommandQueue putWriteImage(CLImage2d<?> writeImage, int inputRowPitch,
             int originX, int originY, int rangeX, int rangeY, boolean blockingWrite, CLEventList events) {
 
-        copy2NIO(bufferA, originX, originY);
-        copy2NIO(bufferB, rangeX, rangeY);
+        // spec: CL_INVALID_VALUE if image is a 2D image object and origin[2] is not equal to 0
+        // or region[2] is not equal to 1 or slice_pitch is not equal to 0.
+        copy2NIO(bufferA, originX, originY, 0);
+        copy2NIO(bufferB, rangeX, rangeY, 1);
 
         int ret = cl.clEnqueueWriteImage(ID, writeImage.ID, blockingWrite ? CL_TRUE : CL_FALSE,
                                          bufferA, bufferB, inputRowPitch, 0, writeImage.buffer,
@@ -212,8 +214,10 @@ public class CLCommandQueue implements CLResource {
     public CLCommandQueue putReadImage(CLImage2d<?> readImage, int inputRowPitch,
             int originX, int originY, int rangeX, int rangeY, boolean blockingRead, CLEventList events) {
 
-        copy2NIO(bufferA, originX, originY);
-        copy2NIO(bufferB, rangeX, rangeY);
+        // spec: CL_INVALID_VALUE if image is a 2D image object and origin[2] is not equal to 0
+        // or region[2] is not equal to 1 or slice_pitch is not equal to 0.
+        copy2NIO(bufferA, originX, originY, 0);
+        copy2NIO(bufferB, rangeX, rangeY, 1);
 
         int ret = cl.clEnqueueReadImage(ID, readImage.ID, blockingRead ? CL_TRUE : CL_FALSE,
                                          bufferA, bufferB, inputRowPitch, 0, readImage.buffer,
@@ -278,9 +282,11 @@ public class CLCommandQueue implements CLResource {
                                         int dstOriginX, int dstOriginY,
                                         int rangeX, int rangeY, CLEventList events) {
 
-        copy2NIO(bufferA, srcOriginX, srcOriginY);
-        copy2NIO(bufferB, dstOriginX, dstOriginY);
-        copy2NIO(bufferC, rangeX, rangeY);
+        //spec: CL_INVALID_VALUE if src_image is a 2D image object and origin[2] or dst_origin[2] is not equal to 0
+        // or region[2] is not equal to 1.
+        copy2NIO(bufferA, srcOriginX, srcOriginY, 0);
+        copy2NIO(bufferB, dstOriginX, dstOriginY, 0);
+        copy2NIO(bufferC, rangeX, rangeY, 1);
 
         int ret = cl.clEnqueueCopyImage(ID, srcImage.ID, dstImage.ID, bufferA, bufferB, bufferC,
                                          0, null, events==null ? null : events.IDs);
@@ -349,8 +355,10 @@ public class CLCommandQueue implements CLResource {
                                         long srcOffset, int dstOriginX, int dstOriginY,
                                         int rangeX, int rangeY, CLEventList events) {
 
-        copy2NIO(bufferA, dstOriginX, dstOriginY);
-        copy2NIO(bufferB, rangeX, rangeY);
+        // spec: CL_INVALID_VALUE if dst_image is a 2D image object and dst_origin[2] is not equal to 0
+        // or region[2] is not equal to 1.
+        copy2NIO(bufferA, dstOriginX, dstOriginY, 0);
+        copy2NIO(bufferB, rangeX, rangeY, 1);
 
         int ret = cl.clEnqueueCopyBufferToImage(ID, srcBuffer.ID, dstImage.ID,
                                          srcOffset, bufferA, bufferB,
@@ -418,8 +426,10 @@ public class CLCommandQueue implements CLResource {
                                         int srcOriginX, int srcOriginY,
                                         int rangeX, int rangeY, long dstOffset, CLEventList events) {
 
-        copy2NIO(bufferA, srcOriginX, srcOriginY);
-        copy2NIO(bufferB, rangeX, rangeY);
+        // spec: CL_INVALID_VALUE if src_image is a 2D image object and src_origin[2] is not equal to 0
+        // or region[2] is not equal to 1.
+        copy2NIO(bufferA, srcOriginX, srcOriginY, 0);
+        copy2NIO(bufferB, rangeX, rangeY, 1);
 
         int ret = cl.clEnqueueCopyImageToBuffer(ID, dstBuffer.ID, srcImage.ID,
                                          bufferA, bufferB, dstOffset,
@@ -511,8 +521,11 @@ public class CLCommandQueue implements CLResource {
                                     int offsetX, int offsetY,
                                     int rangeX, int rangeY, boolean blockingMap, CLEventList events) {
         IntBuffer error = bufferA.position(0).getBuffer().asIntBuffer();
-        copy2NIO(bufferB, offsetX, offsetY);
-        copy2NIO(bufferC, rangeX, rangeY);
+
+        // spec: CL_INVALID_VALUE if image is a 2D image object and origin[2] is not equal to 0 or region[2] is not equal to 1
+        copy2NIO(bufferB, offsetX, offsetY, 0);
+        copy2NIO(bufferC, rangeX, rangeY, 1);
+
         ByteBuffer mappedImage = cl.clEnqueueMapImage(ID, buffer.ID, blockingMap ? CL_TRUE : CL_FALSE,
                                          flag.FLAGS, bufferB, bufferC, null, null,
                                          0, null, events==null ? null : events.IDs, error);
diff --git a/src/com/mbien/opencl/CLGLContext.java b/src/com/mbien/opencl/CLGLContext.java
index a96891c0..6fb0251f 100644
--- a/src/com/mbien/opencl/CLGLContext.java
+++ b/src/com/mbien/opencl/CLGLContext.java
@@ -143,6 +143,14 @@ public final class CLGLContext extends CLContext {
     }
 
 
+    public final CLGLBuffer<?> createFromGLBuffer(int glBuffer, Mem... flags) {
+        return createFromGLBuffer(null, glBuffer, Mem.flagsToInt(flags));
+    }
+
+    public final CLGLBuffer<?> createFromGLBuffer(int glBuffer, int flags) {
+        return createFromGLBuffer(null, glBuffer, flags);
+    }
+
     public final <B extends Buffer> CLGLBuffer<B> createFromGLBuffer(B directBuffer, int glBuffer, Mem... flags) {
         return createFromGLBuffer(directBuffer, glBuffer, Mem.flagsToInt(flags));
     }
diff --git a/src/com/mbien/opencl/CLMemory.java b/src/com/mbien/opencl/CLMemory.java
index 2d12ca31..0c59e0c5 100644
--- a/src/com/mbien/opencl/CLMemory.java
+++ b/src/com/mbien/opencl/CLMemory.java
@@ -38,10 +38,12 @@ public abstract class CLMemory <B extends Buffer> implements CLResource {
         this.ID = id;
     }
 
+    /**
+     * Returns true if a host pointer must be specified on mem object creation.
+     */
     protected static final boolean isHostPointerFlag(int flags) {
         return (flags & CL_MEM_COPY_HOST_PTR) != 0
-            || (flags & CL_MEM_USE_HOST_PTR)  != 0
-            || (flags & CL_MEM_ALLOC_HOST_PTR)!= 0;
+            || (flags & CL_MEM_USE_HOST_PTR)  != 0;
     }
 
     protected static final int sizeOfBufferElem(Buffer buffer) {