Api copy works when copying individual elements but not the entire buffer

This code doesn't appear to send the correct data to the kernel.

clBuffer.getBuffer().clear();
clBuffer.getBuffer().rewind();
clBuffer.getBuffer().put(Buffer,0, Buffer.length);
clQueue.putWriteBuffer(clBuffer, true);

This code does

clBuffer.getBuffer().clear();
clBuffer.getBuffer().rewind();
clBuffer.getBuffer().put(0,Buffer[0]);
clQueue.putWriteBuffer(clBuffer, true);

Both overloads of put are being used correctly according to the java documentation. Is there something about the JOCL API that causes one version of put to be sent to the kernel and not the other?

Hi

The first put() method you use is relative whereas the second put() method you use is absolute (cf. the Java documentation). In the first case, just call clBuffer.getBuffer().rewind() before calling clQueue.putWriteBuffer(clBuffer, true) and it should work.

Thanks for the response. I believe I did use rewind in both scenarios. That is what is confusing me.