NAME¶
clEnqueueCopyImageToBuffer - Enqueues a command to copy an image
object to a buffer object.
cl_int
clEnqueueCopyImageToBuffer(cl_command_queue command_queue,
cl_mem src_image,
cl_mem dst_buffer,
const size_t *src_origin,
const size_t *region,
size_t dst_offset,
cl_uint num_events_in_wait_list,
const cl_event *event_wait_list,
cl_event *event);
PARAMETERS¶
command_queue
Must be a valid command-queue. The OpenCL context
associated with command_queue, src_image, and dst_buffer
must be the same.
src_image
A valid image object.
dst_buffer
A valid buffer object.
src_origin
Defines the (x, y, z) offset in pixels in the 1D, 2D or
3D image, the (x, y) offset and the image index in the 2D image array or the
(x) offset and the image index in the 1D image array. If src_image is a
2D image object, src_origin[2] must be 0. If src_image is a 1D
image or 1D image buffer object, src_origin[1] and src_origin[2]
must be 0. If src_image is a 1D image array object,
src_origin[2] must be 0. If src_image is a 1D image array
object, src_origin[1] describes the image index in the 1D image array.
If src_image is a 2D image array object, src_origin[2] describes
the image index in the 2D image array.
region
Defines the (width, height, depth) in pixels of the 1D,
2D or 3D rectangle, the (width, height) in pixels of the 2D rectangle and the
number of images of a 2D image array or the (width) in pixels of the 1D
rectangle and the number of images of a 1D image array. If src_image is
a 2D image object, region[2] must be 1. If src_image is a 1D
image or 1D image buffer object, region[1] and region[2] must be
1. If src_image is a 1D image array object, region[2] must be
1.
dst_offset
Refers to the offset where to begin copying data into
dst_buffer. The size in bytes of the region to be copied referred to as
dst_cb is computed as width * height * depth * bytes/image element if
src_image is a 3D image object, is computed as width * height *
bytes/image element if src_image is a 2D image, is computed as width *
height * arraysize * bytes/image element if src_image is a 2D image
array object, is computed as width * bytes/image element if src_image
is a 1D image or 1D image buffer object and is computed as width * arraysize *
bytes/image element if src_image is a 1D image array object.
event_wait_list , num_events_in_wait_list
Specify events that need to complete before this
particular command can be executed. If event_wait_list is NULL, then
this particular command does not wait on any event to complete. If
event_wait_list is NULL, num_events_in_wait_list must be 0. If
event_wait_list is not NULL, the list of events pointed to by
event_wait_list must be valid and num_events_in_wait_list must
be greater than 0. The events specified in event_wait_list act as
synchronization points. The context associated with events in
event_wait_list and command_queue must be the same. The memory
associated with event_wait_list can be reused or freed after the
function returns.
event
Returns an event object that identifies this particular
copy command and can be used to query or queue a wait for this particular
command to complete. event can be NULL in which case it will not be
possible for the application to query the status of this command or queue a
wait for this command to complete. clEnqueueBarrierWithWaitList(3clc)
can be used instead. If the event_wait_list and the event
arguments are not NULL, the event argument should not refer to an
element of the event_wait_list array.
ERRORS¶
clEnqueueCopyImageToBuffer returns CL_SUCCESS if the
function is executed successfully. Otherwise, it returns one of the
following errors:
•CL_INVALID_COMMAND_QUEUE if command_queue
is not a valid command-queue.
•CL_INVALID_CONTEXT if the context associated with
command_queue, src_image and dst_buffer are not the same
or if the context associated with command_queue and events in
event_wait_list are not the same.
•CL_INVALID_MEM_OBJECT if src_image is not
a valid image object or dst_buffer is not a valid buffer object or if
src_image is a 1D image buffer object created from
dst_buffer.
•CL_INVALID_VALUE if the 1D, 2D, or 3D rectangular
region specified by src_origin and src_origin + region
refers to a region outside src_image, or if the region specified by
dst_offset and dst_offset + dst_cb refers to a region
outside dst_buffer.
•CL_INVALID_VALUE if values in src_origin
and region do not follow rules described in the argument description
for src_origin and region.
•CL_INVALID_EVENT_WAIT_LIST if
event_wait_list is NULL and num_events_in_wait_list > 0, or
event_wait_list is not NULL and num_events_in_wait_list is 0, or
if event objects in event_wait_list are not valid events.
•CL_MISALIGNED_SUB_BUFFER_OFFSET if
dst_buffer is a sub-buffer object and offset specified when the
sub-buffer object is created is not aligned to
CL_DEVICE_MEM_BASE_ADDR_ALIGN value for device associated with
queue.
•CL_INVALID_IMAGE_SIZE if image dimensions (image
width, height, specified or compute row and/or slice pitch) for
src_image are not supported by device associated with
queue.
•CL_INVALID_IMAGE_FORMAT if image format (image
channel order and data type) for src_image are not supported by device
associated with queue.
•CL_MEM_OBJECT_ALLOCATION_FAILURE if there is a
failure to allocate memory for data store associated with src_image or
dst_buffer.
•CL_INVALID_OPERATION if the device associated
with command_queue does not support images (i.e.
CL_DEVICE_IMAGE_SUPPORT specified in the table of OpenCL Device Queries
for clGetDeviceInfo(3clc) is CL_FALSE).
•CL_OUT_OF_RESOURCES if there is a failure to
allocate resources required by the OpenCL implementation on the device.
•CL_OUT_OF_HOST_MEMORY if there is a failure to
allocate resources required by the OpenCL implementation on the host.
SPECIFICATION¶
OpenCL Specification[1]
SEE ALSO¶
clEnqueueReadBuffer(3clc),
clEnqueueWriteBuffer(3clc), clCreateBuffer(3clc),
clEnqueueCopyBuffer(3clc),
clEnqueueCopyBufferToImage(3clc)
AUTHORS¶
The Khronos Group
COPYRIGHT¶
Copyright © 2007-2011 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to the
condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.
NOTES¶
- 1.
- OpenCL Specification
page 107, section 5.3.4 - Copying between Image and
Buffer Objects
