NAME¶
clEnqueueCopyImage - Enqueues a command to copy image objects.
cl_int
clEnqueueCopyImage(cl_command_queue command_queue,
cl_mem src_image,
cl_mem dst_image,
const size_t *src_origin,
const size_t *dst_origin,
const size_t *region,
cl_uint num_events_in_wait_list,
const cl_event *event_wait_list,
cl_event *event);
PARAMETERS¶
command_queue
Refers to the command-queue in which the copy command
will be queued. The OpenCL context associated with command_queue,
src_image and dst_image must be the same.
src_image, dst_image,
Can be 1D, 2D, 3D image or a 1D, 2D image array objects
allowing us to perform the following actions:
• Copy a 1D image object to a 1D image
object.
• Copy a 1D image object to a scanline of a 2D
image object and vice-versa.
• Copy a 1D image object to a scanline of a 2D
slice of a 3D image object and vice-versa.
• Copy a 1D image object to a scanline of a
specific image index of a 1D or 2D image array object and vice-versa.
• Copy a 2D image object to a 2D image
object.
• Copy a 2D image object to a 2D slice of a 3D
image object and vice-versa.
• Copy a 2D image object to a specific image index
of a 2D image array object and vice versa.
• Copy images from a 1D image array object to a 1D
image array object.
• Copy images from a 2D image array object to a 2D
image array object.
• Copy a 3D image object to a 3D image
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 image is a 2D
image object, src_origin[2] must be 0. If src_image is a 1D
image 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.
dst_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 dst_image is a
2D image object, dst_origin[2] must be 0. If dst_image is a 1D
image or 1D image buffer object, dst_origin[1] and dst_origin[2]
must be 0. If dst_image is a 1D image array object,
dst_origin[2] must be 0. If dst_image is a 1D image array
object, dst_origin[1] describes the image index in the 1D image array.
If dst_image is a 2D image array object, dst_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 or dst_image is a 2D image object, region[2]
must be 1. If src_image or dst_image is a 1D image or 1D image
buffer object, region[1] and region[2] must be 1. If
src_image or dst_image is a 1D image array object,
region[2] must be 1.
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.
NOTES¶
It is currently a requirement that the src_image and
dst_image image memory objects for clEnqueueCopyImage must
have the exact same image format (i.e. the cl_image_format(3clc)
descriptor specified when src_image and dst_image are created
must match).
ERRORS¶
clEnqueueCopyImage 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_image 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 and
dst_image are not valid image objects.
•CL_IMAGE_FORMAT_MISMATCH if src_image and
dst_image do not use the same image format.
•CL_INVALID_VALUE if the 2D or 3D rectangular
region specified by src_origin and src_origin + region
refers to a region outside src_image, or if the 2D or 3D rectangular
region specified by dst_origin and dst_origin + region
refers to a region outside dst_image.
•CL_INVALID_VALUE if values in src_origin,
dst_origin and region do not follow rules described in the
argument description for src_origin, dst_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_INVALID_IMAGE_SIZE if image dimensions (image
width, height, specified or compute row and/or slice pitch) for
src_image or dst_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 or dst_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_image.
•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.
•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_MEM_COPY_OVERLAP if src_image and
dst_image are the same image object and the source and destination
regions overlap.
SPECIFICATION¶
OpenCL Specification[1]
SEE ALSO¶
clEnqueueReadImage(3clc),
clEnqueueWriteImage(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 104, section 5.3.3 - Reading, Writing and Copying
Image Objects
