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does device side enqueue support image object as child kernel parameter

Question asked by lucia on Jan 5, 2016

hi,I have a question about OpenCL2.0, hope you guys can help me.

I am trying to enqueue a kernel inside a kernel using device side enqueue feature of OpenCL 2.0, the child kernel has a parameter known as image object(write_only), but when i try to read the image object in host side ,there is nothing but zero values in the image object. However, when i try buffer object, the result is true. My question is: does device side enqueue support image object as parameter for child kernel.I know it support pipe as in SDK sample DeviceEnqueueBFS. The code is shown below:



void kernelLauncher(__global uchar *preFrame,

                                read_write image2d_t preFrameME,

                                __constant sclParam *param)


  int ret;

  clk_event_t event_ip, event_me;


  size_t globalWorkSize[2];

  size_t localWorkSize[2];

  ndrange_t ndrange;


  //define a block for IP kernel

  void (^IP_blk)(void) = ^{clDownsample2K1K((__global uchar2*)preFrame,





  //NDRange infomation for IP part

  globalWorkSize[0] = 960;

  globalWorkSize[1] = 540;

  localWorkSize[0] = 64;

  localWorkSize[1] = 1;

  ndrange = ndrange_2D(globalWorkSize, localWorkSize);


  ret = enqueue_kernel(get_default_queue(), CLK_ENQUEUE_FLAGS_NO_WAIT,

  ndrange, 0, NULL, &event_ip, IP_blk);

  if(ret != 0)