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Revision 1.3 by root, Tue Nov 15 20:38:07 2011 UTC vs.
Revision 1.33 by root, Thu Apr 19 12:55:30 2012 UTC

1	=head1 NAME	1	=head1 NAME
2		2
3	OpenCL - bindings to, well, OpenCL	3	OpenCL - Open Computing Language Bindings
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use OpenCL;	7	use OpenCL;
8		8
9	=head1 DESCRIPTION	9	=head1 DESCRIPTION
10		10
11	This is an early release which is not useful yet.	11	This is an early release which might be useful, but hasn't seen much testing.
12		12
		13	=head2 OpenCL FROM 10000 FEET HEIGHT
		14
		15	Here is a high level overview of OpenCL:
		16
		17	First you need to find one or more OpenCL::Platforms (kind of like
		18	vendors) - usually there is only one.
		19
		20	Each platform gives you access to a number of OpenCL::Device objects, e.g.
		21	your graphics card.
		22
		23	From a platform and some device(s), you create an OpenCL::Context, which is
		24	a very central object in OpenCL: Once you have a context you can create
		25	most other objects:
		26
		27	OpenCL::Program objects, which store source code and, after building for a
		28	specific device ("compiling and linking"), also binary programs. For each
		29	kernel function in a program you can then create an OpenCL::Kernel object
		30	which represents basically a function call with argument values.
		31
		32	OpenCL::Memory objects of various flavours: OpenCL::Buffer objects (flat
		33	memory areas, think arrays or structs) and OpenCL::Image objects (think 2d
		34	or 3d array) for bulk data and input and output for kernels.
		35
		36	OpenCL::Sampler objects, which are kind of like texture filter modes in
		37	OpenGL.
		38
		39	OpenCL::Queue objects - command queues, which allow you to submit memory
		40	reads, writes and copies, as well as kernel calls to your devices. They
		41	also offer a variety of methods to synchronise request execution, for
		42	example with barriers or OpenCL::Event objects.
		43
		44	OpenCL::Event objects are used to signal when something is complete.
		45
13	=head1 HELPFUL RESOURCES	46	=head2 HELPFUL RESOURCES
14		47
15	The OpenCL spec used to dveelop this module (1.2 spec was available, but	48	The OpenCL spec used to develop this module (1.2 spec was available, but
16	no implementation was available to me :).	49	no implementation was available to me :).
17		50
18	http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf	51	http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf
19		52
20	OpenCL manpages:	53	OpenCL manpages:
21		54
22	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/	55	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/
23		56
		57	If you are into UML class diagrams, the following diagram might help - if
		58	not, it will be mildly cobfusing:
		59
		60	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/classDiagram.html
		61
		62	Here's a tutorial from AMD (very AMD-centric, too), not sure how useful it
		63	is, but at least it's free of charge:
		64
		65	http://developer.amd.com/zones/OpenCLZone/courses/Documents/Introduction_to_OpenCL_Programming%20Training_Guide%20%28201005%29.pdf
		66
		67	And here's NVIDIA's OpenCL Best Practises Guide:
		68
		69	http://developer.download.nvidia.com/compute/cuda/3_2/toolkit/docs/OpenCL_Best_Practices_Guide.pdf
		70
		71	=head1 BASIC WORKFLOW
		72
		73	To get something done, you basically have to do this once (refer to the
		74	examples below for actual code, this is just a high-level description):
		75
		76	Find some platform (e.g. the first one) and some device(s) (e.g. the first
		77	device of the platform), and create a context from those.
		78
		79	Create program objects from your OpenCL source code, then build (compile)
		80	the programs for each device you want to run them on.
		81
		82	Create kernel objects for all kernels you want to use (surprisingly, these
		83	are not device-specific).
		84
		85	Then, to execute stuff, you repeat these steps, possibly resuing or
		86	sharing some buffers:
		87
		88	Create some input and output buffers from your context. Set these as
		89	arguments to your kernel.
		90
		91	Enqueue buffer writes to initialise your input buffers (when not
		92	initialised at creation time).
		93
		94	Enqueue the kernel execution.
		95
		96	Enqueue buffer reads for your output buffer to read results.
		97
24	=head1 EXAMPLES	98	=head1 EXAMPLES
25		99
26	Enumerate all devices and get contexts for them;	100	=head2 Enumerate all devices and get contexts for them.
		101
		102	Best run this once to get a feel for the platforms and devices in your
		103	system.
27		104
28	for my $platform (OpenCL::platforms) {	105	for my $platform (OpenCL::platforms) {
29	warn $platform->info (OpenCL::PLATFORM_NAME);	106	printf "platform: %s\n", $platform->name;
30	warn $platform->info (OpenCL::PLATFORM_EXTENSIONS);	107	printf "extensions: %s\n", $platform->extensions;
31	for my $device ($platform->devices) {	108	for my $device ($platform->devices) {
32	warn $device->info (OpenCL::DEVICE_NAME);	109	printf "+ device: %s\n", $device->name;
33	my $ctx = $device->context_simple;	110	my $ctx = $platform->context (undef, [$device]);
34	# do stuff	111	# do stuff
35	}	112	}
36	}	113	}
37		114
38	Get a useful context and a command queue:	115	=head2 Get a useful context and a command queue.
39		116
40	my $dev = ((OpenCL::platforms)[0]->devices)[0];	117	This is a useful boilerplate for any OpenCL program that only wants to use
41	my $ctx = $dev->context_simple;	118	one device,
42	my $queue = $ctx->command_queue_simple ($dev);
43		119
44	Create a buffer with some predefined data, read it back synchronously,	120	my ($platform) = OpenCL::platforms; # find first platform
45	then asynchronously:	121	my ($dev) = $platform->devices; # find first device of platform
		122	my $ctx = $platform->context (undef, [$dev]); # create context out of those
		123	my $queue = $ctx->queue ($dev); # create a command queue for the device
46		124
47	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");
48
49	$queue->enqueue_read_buffer ($buf, 1, 1, 3, my $data);
50	warn $data;
51
52	my $ev = $queue->enqueue_read_buffer ($buf, 0, 1, 3, my $data);
53	$ev->wait;
54	warn $data;
55
56	Print all supported image formats:	125	=head2 Print all supported image formats of a context.
		126
		127	Best run this once for your context, to see whats available and how to
		128	gather information.
57		129
58	for my $type (OpenCL::MEM_OBJECT_IMAGE2D, OpenCL::MEM_OBJECT_IMAGE3D) {	130	for my $type (OpenCL::MEM_OBJECT_IMAGE2D, OpenCL::MEM_OBJECT_IMAGE3D) {
59	say "supported image formats for ", OpenCL::enum2str $type;	131	print "supported image formats for ", OpenCL::enum2str $type, "\n";
60		132
61	for my $f ($ctx->supported_image_formats (0, $type)) {	133	for my $f ($ctx->supported_image_formats (0, $type)) {
62	printf " %-10s %-20s\n", OpenCL::enum2str $f->[0], OpenCL::enum2str $f->[1];	134	printf " %-10s %-20s\n", OpenCL::enum2str $f->[0], OpenCL::enum2str $f->[1];
63	}	135	}
64	}	136	}
65		137
		138	=head2 Create a buffer with some predefined data, read it back synchronously,
		139	then asynchronously.
		140
		141	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");
		142
		143	$queue->enqueue_read_buffer ($buf, 1, 1, 3, my $data);
		144	print "$data\n";
		145
		146	my $ev = $queue->enqueue_read_buffer ($buf, 0, 1, 3, my $data);
		147	$ev->wait;
		148	print "$data\n"; # prints "elm"
		149
66	Create and build a program, then create a kernel out of one of its	150	=head2 Create and build a program, then create a kernel out of one of its
67	functions:	151	functions.
68		152
69	my $src = '	153	my $src = '
70	__kernel void	154	kernel void
71	squareit (__global float *input, __global float *output)	155	squareit (global float *input, global float *output)
72	{	156	{
73	size_t id = get_global_id (0);	157	$id = get_global_id (0);
74	output [id] = input [id] * input [id];	158	output [id] = input [id] * input [id];
75	}	159	}
76	';	160	';
77		161
78	my $prog = $ctx->program_with_source ($src);	162	my $prog = $ctx->program_with_source ($src);
79		163
		164	# build croaks on compile errors, so catch it and print the compile errors
80	eval { $prog->build ($dev); 1 }	165	eval { $prog->build ($dev); 1 }
81	or die $prog->build_info ($dev, OpenCL::PROGRAM_BUILD_LOG);	166	or die $prog->build_log;
82		167
83	my $kernel = $prog->kernel ("squareit");	168	my $kernel = $prog->kernel ("squareit");
84		169
		170	=head2 Create some input and output float buffers, then call the
		171	'squareit' kernel on them.
		172
		173	my $input = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, pack "f*", 1, 2, 3, 4.5);
		174	my $output = $ctx->buffer (0, OpenCL::SIZEOF_FLOAT * 5);
		175
		176	# set buffer
		177	$kernel->set_buffer (0, $input);
		178	$kernel->set_buffer (1, $output);
		179
		180	# execute it for all 4 numbers
		181	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);
		182
		183	# enqueue a synchronous read
		184	$queue->enqueue_read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
		185
		186	# print the results:
		187	printf "%s\n", join ", ", unpack "f*", $data;
		188
		189	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
		190	showing off barriers.
		191
		192	# execute it for all 4 numbers
		193	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);
		194
		195	# enqueue a barrier to ensure in-order execution
		196	$queue->enqueue_barrier;
		197
		198	# enqueue an async read
		199	$queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
		200
		201	# wait for all requests to finish
		202	$queue->finish;
		203
		204	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
		205	showing off event objects and wait lists.
		206
		207	# execute it for all 4 numbers
		208	my $ev = $queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);
		209
		210	# enqueue an async read
		211	$ev = $queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);
		212
		213	# wait for the last event to complete
		214	$ev->wait;
		215
		216	=head1 DOCUMENTATION
		217
		218	=head2 BASIC CONVENTIONS
		219
		220	This is not a one-to-one C-style translation of OpenCL to Perl - instead
		221	I attempted to make the interface as type-safe as possible by introducing
		222	object syntax where it makes sense. There are a number of important
		223	differences between the OpenCL C API and this module:
		224
85	=over 4	225	=over 4
86		226
		227	=item * Object lifetime managament is automatic - there is no need
		228	to free objects explicitly (C<clReleaseXXX>), the release function
		229	is called automatically once all Perl references to it go away.
		230
		231	=item * OpenCL uses CamelCase for function names
		232	(e.g. C<clGetPlatformIDs>, C<clGetPlatformInfo>), while this module
		233	uses underscores as word separator and often leaves out prefixes
		234	(C<OpenCL::platforms>, C<< $platform->info >>).
		235
		236	=item * OpenCL often specifies fixed vector function arguments as short
		237	arrays (C<size_t origin[3]>), while this module explicitly expects the
		238	components as separate arguments (C<$orig_x, $orig_y, $orig_z>) in
		239	function calls.
		240
		241	=item * Structures are often specified by flattening out their components
		242	as with short vectors, and returned as arrayrefs.
		243
		244	=item * When enqueuing commands, the wait list is specified by adding
		245	extra arguments to the function - anywhere a C<$wait_events...> argument
		246	is documented this can be any number of event objects.
		247
		248	=item * When enqueuing commands, if the enqueue method is called in void
		249	context, no event is created. In all other contexts an event is returned
		250	by the method.
		251
		252	=item * This module expects all functions to return C<CL_SUCCESS>. If any
		253	other status is returned the function will throw an exception, so you
		254	don't normally have to to any error checking.
		255
		256	=back
		257
		258	=head2 PERL AND OPENCL TYPES
		259
		260	This handy(?) table lists OpenCL types and their perl, PDL and pack/unpack
		261	format equivalents:
		262
		263	OpenCL perl PDL pack/unpack
		264	char IV - c
		265	uchar IV byte C
		266	short IV short s
		267	ushort IV ushort S
		268	int IV long? l
		269	uint IV - L
		270	long IV longlong q
		271	ulong IV - Q
		272	float NV float f
		273	half IV ushort S
		274	double NV double d
		275
		276	=head2 THE OpenCL PACKAGE
		277
		278	=over 4
		279
		280	=item $int = OpenCL::errno
		281
		282	The last error returned by a function - it's only valid after an error occured
		283	and before calling another OpenCL function.
		284
		285	=item $str = OpenCL::err2str $errval
		286
		287	Comverts an error value into a human readable string.
		288
		289	=item $str = OpenCL::enum2str $enum
		290
		291	Converts most enum values (of parameter names, image format constants,
		292	object types, addressing and filter modes, command types etc.) into a
		293	human readable string. When confronted with some random integer it can be
		294	very helpful to pass it through this function to maybe get some readable
		295	string out of it.
		296
		297	=item @platforms = OpenCL::platforms
		298
		299	Returns all available OpenCL::Platform objects.
		300
		301	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>
		302
		303	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef
		304
		305	Tries to create a context from a default device and platform - never worked for me.
		306
		307	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
		308
		309	=item OpenCL::wait_for_events $wait_events...
		310
		311	Waits for all events to complete.
		312
		313	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
		314
		315	=back
		316
		317	=head2 THE OpenCL::Platform CLASS
		318
		319	=over 4
		320
		321	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)
		322
		323	Returns a list of matching OpenCL::Device objects.
		324
		325	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef)
		326
		327	Tries to create a context. Never worked for me, and you need devices explicitly anyway.
		328
		329	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
		330
		331	=item $ctx = $platform->context ($properties = undef, @$devices, $notify = undef)
		332
		333	Create a new OpenCL::Context object using the given device object(s)- a
		334	CL_CONTEXT_PLATFORM property is supplied automatically.
		335
		336	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
		337
		338	=item $packed_value = $platform->info ($name)
		339
		340	Calls C<clGetPlatformInfo> and returns the packed, raw value - for
		341	strings, this will be the string (possibly including terminating \0), for
		342	other values you probably need to use the correct C<unpack>.
		343
		344	It's best to avoid this method and use one of the following convenience
		345	wrappers.
		346
		347	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>
		348
		349	=for gengetinfo begin platform
		350
		351	=item $string = $platform->profile
		352
		353	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_PROFILE> and returns the result.
		354
		355	=item $string = $platform->version
		356
		357	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VERSION> and returns the result.
		358
		359	=item $string = $platform->name
		360
		361	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_NAME> and returns the result.
		362
		363	=item $string = $platform->vendor
		364
		365	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VENDOR> and returns the result.
		366
		367	=item $string = $platform->extensions
		368
		369	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_EXTENSIONS> and returns the result.
		370
		371	=for gengetinfo end platform
		372
		373	=back
		374
		375	=head2 THE OpenCL::Device CLASS
		376
		377	=over 4
		378
		379	=item $packed_value = $device->info ($name)
		380
		381	See C<< $platform->info >> for details.
		382
		383	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>
		384
		385	=for gengetinfo begin device
		386
		387	=item $device_type = $device->type
		388
		389	Calls C<clGetDeviceInfo> with C<CL_DEVICE_TYPE> and returns the result.
		390
		391	=item $uint = $device->vendor_id
		392
		393	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR_ID> and returns the result.
		394
		395	=item $uint = $device->max_compute_units
		396
		397	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_COMPUTE_UNITS> and returns the result.
		398
		399	=item $uint = $device->max_work_item_dimensions
		400
		401	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result.
		402
		403	=item $int = $device->max_work_group_size
		404
		405	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_GROUP_SIZE> and returns the result.
		406
		407	=item @ints = $device->max_work_item_sizes
		408
		409	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_SIZES> and returns the result.
		410
		411	=item $uint = $device->preferred_vector_width_char
		412
		413	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result.
		414
		415	=item $uint = $device->preferred_vector_width_short
		416
		417	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result.
		418
		419	=item $uint = $device->preferred_vector_width_int
		420
		421	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result.
		422
		423	=item $uint = $device->preferred_vector_width_long
		424
		425	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result.
		426
		427	=item $uint = $device->preferred_vector_width_float
		428
		429	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result.
		430
		431	=item $uint = $device->preferred_vector_width_double
		432
		433	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result.
		434
		435	=item $uint = $device->max_clock_frequency
		436
		437	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CLOCK_FREQUENCY> and returns the result.
		438
		439	=item $bitfield = $device->address_bits
		440
		441	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ADDRESS_BITS> and returns the result.
		442
		443	=item $uint = $device->max_read_image_args
		444
		445	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_READ_IMAGE_ARGS> and returns the result.
		446
		447	=item $uint = $device->max_write_image_args
		448
		449	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result.
		450
		451	=item $ulong = $device->max_mem_alloc_size
		452
		453	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result.
		454
		455	=item $int = $device->image2d_max_width
		456
		457	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_WIDTH> and returns the result.
		458
		459	=item $int = $device->image2d_max_height
		460
		461	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result.
		462
		463	=item $int = $device->image3d_max_width
		464
		465	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_WIDTH> and returns the result.
		466
		467	=item $int = $device->image3d_max_height
		468
		469	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result.
		470
		471	=item $int = $device->image3d_max_depth
		472
		473	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_DEPTH> and returns the result.
		474
		475	=item $uint = $device->image_support
		476
		477	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE_SUPPORT> and returns the result.
		478
		479	=item $int = $device->max_parameter_size
		480
		481	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_PARAMETER_SIZE> and returns the result.
		482
		483	=item $uint = $device->max_samplers
		484
		485	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_SAMPLERS> and returns the result.
		486
		487	=item $uint = $device->mem_base_addr_align
		488
		489	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result.
		490
		491	=item $uint = $device->min_data_type_align_size
		492
		493	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result.
		494
		495	=item $device_fp_config = $device->single_fp_config
		496
		497	Calls C<clGetDeviceInfo> with C<CL_DEVICE_SINGLE_FP_CONFIG> and returns the result.
		498
		499	=item $device_mem_cache_type = $device->global_mem_cache_type
		500
		501	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result.
		502
		503	=item $uint = $device->global_mem_cacheline_size
		504
		505	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result.
		506
		507	=item $ulong = $device->global_mem_cache_size
		508
		509	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result.
		510
		511	=item $ulong = $device->global_mem_size
		512
		513	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_SIZE> and returns the result.
		514
		515	=item $ulong = $device->max_constant_buffer_size
		516
		517	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result.
		518
		519	=item $uint = $device->max_constant_args
		520
		521	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_ARGS> and returns the result.
		522
		523	=item $device_local_mem_type = $device->local_mem_type
		524
		525	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_TYPE> and returns the result.
		526
		527	=item $ulong = $device->local_mem_size
		528
		529	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_SIZE> and returns the result.
		530
		531	=item $boolean = $device->error_correction_support
		532
		533	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result.
		534
		535	=item $int = $device->profiling_timer_resolution
		536
		537	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result.
		538
		539	=item $boolean = $device->endian_little
		540
		541	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ENDIAN_LITTLE> and returns the result.
		542
		543	=item $boolean = $device->available
		544
		545	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AVAILABLE> and returns the result.
		546
		547	=item $boolean = $device->compiler_available
		548
		549	Calls C<clGetDeviceInfo> with C<CL_DEVICE_COMPILER_AVAILABLE> and returns the result.
		550
		551	=item $device_exec_capabilities = $device->execution_capabilities
		552
		553	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXECUTION_CAPABILITIES> and returns the result.
		554
		555	=item $command_queue_properties = $device->properties
		556
		557	Calls C<clGetDeviceInfo> with C<CL_DEVICE_QUEUE_PROPERTIES> and returns the result.
		558
		559	=item $ = $device->platform
		560
		561	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PLATFORM> and returns the result.
		562
		563	=item $string = $device->name
		564
		565	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NAME> and returns the result.
		566
		567	=item $string = $device->vendor
		568
		569	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR> and returns the result.
		570
		571	=item $string = $device->driver_version
		572
		573	Calls C<clGetDeviceInfo> with C<CL_DRIVER_VERSION> and returns the result.
		574
		575	=item $string = $device->profile
		576
		577	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILE> and returns the result.
		578
		579	=item $string = $device->version
		580
		581	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VERSION> and returns the result.
		582
		583	=item $string = $device->extensions
		584
		585	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXTENSIONS> and returns the result.
		586
		587	=item $uint = $device->preferred_vector_width_half
		588
		589	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result.
		590
		591	=item $uint = $device->native_vector_width_char
		592
		593	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result.
		594
		595	=item $uint = $device->native_vector_width_short
		596
		597	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result.
		598
		599	=item $uint = $device->native_vector_width_int
		600
		601	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result.
		602
		603	=item $uint = $device->native_vector_width_long
		604
		605	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result.
		606
		607	=item $uint = $device->native_vector_width_float
		608
		609	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result.
		610
		611	=item $uint = $device->native_vector_width_double
		612
		613	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result.
		614
		615	=item $uint = $device->native_vector_width_half
		616
		617	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result.
		618
		619	=item $device_fp_config = $device->double_fp_config
		620
		621	Calls C<clGetDeviceInfo> with C<CL_DEVICE_DOUBLE_FP_CONFIG> and returns the result.
		622
		623	=item $device_fp_config = $device->half_fp_config
		624
		625	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HALF_FP_CONFIG> and returns the result.
		626
		627	=item $boolean = $device->host_unified_memory
		628
		629	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HOST_UNIFIED_MEMORY> and returns the result.
		630
		631	=item $device = $device->parent_device_ext
		632
		633	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARENT_DEVICE_EXT> and returns the result.
		634
		635	=item @device_partition_property_exts = $device->partition_types_ext
		636
		637	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_TYPES_EXT> and returns the result.
		638
		639	=item @device_partition_property_exts = $device->affinity_domains_ext
		640
		641	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AFFINITY_DOMAINS_EXT> and returns the result.
		642
		643	=item $uint = $device->reference_count_ext
		644
		645	Calls C<clGetDeviceInfo> with C<CL_DEVICE_REFERENCE_COUNT_EXT > and returns the result.
		646
		647	=item @device_partition_property_exts = $device->partition_style_ext
		648
		649	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_STYLE_EXT> and returns the result.
		650
		651	=for gengetinfo end device
		652
		653	=back
		654
		655	=head2 THE OpenCL::Context CLASS
		656
		657	=over 4
		658
		659	=item $queue = $ctx->queue ($device, $properties)
		660
		661	Create a new OpenCL::Queue object from the context and the given device.
		662
		663	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>
		664
		665	=item $ev = $ctx->user_event
		666
		667	Creates a new OpenCL::UserEvent object.
		668
		669	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>
		670
		671	=item $buf = $ctx->buffer ($flags, $len)
		672
		673	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object with the
		674	given flags and octet-size.
		675
		676	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>
		677
		678	=item $buf = $ctx->buffer_sv ($flags, $data)
		679
		680	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object and
		681	initialise it with the given data values.
		682
		683	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)
		684
		685	Creates a new OpenCL::Image2D object and optionally initialises it with
		686	the given data values.
		687
		688	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>
		689
		690	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)
		691
		692	Creates a new OpenCL::Image3D object and optionally initialises it with
		693	the given data values.
		694
		695	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>
		696
		697	=item $buffer = $ctx->gl_buffer ($flags, $bufobj)
		698
		699	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object that refers to the given
		700	OpenGL buffer object.
		701
		702	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLBuffer.html
		703
		704	=item $ctx->gl_texture2d ($flags, $target, $miplevel, $texture)
		705
		706	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		707	2D texture object.
		708
		709	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture2D.html
		710
		711	=item $ctx->gl_texture3d ($flags, $target, $miplevel, $texture)
		712
		713	Creates a new OpenCL::Image3D object that refers to the given OpenGL
		714	3D texture object.
		715
		716	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture3D.html
		717
		718	=item $ctx->gl_renderbuffer ($flags, $renderbuffer)
		719
		720	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		721	render buffer.
		722
		723	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLRenderbuffer.html
		724
		725	=item @formats = $ctx->supported_image_formats ($flags, $image_type)
		726
		727	Returns a list of matching image formats - each format is an arrayref with
		728	two values, $channel_order and $channel_type, in it.
		729
		730	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetSupportedImageFormats.html>
		731
		732	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)
		733
		734	Creates a new OpenCL::Sampler object.
		735
		736	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>
		737
		738	=item $program = $ctx->program_with_source ($string)
		739
		740	Creates a new OpenCL::Program object from the given source code.
		741
		742	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>
		743
		744	=item $packed_value = $ctx->info ($name)
		745
		746	See C<< $platform->info >> for details.
		747
		748	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>
		749
		750	=for gengetinfo begin context
		751
		752	=item $uint = $context->reference_count
		753
		754	Calls C<clGetContextInfo> with C<CL_CONTEXT_REFERENCE_COUNT> and returns the result.
		755
		756	=item @devices = $context->devices
		757
		758	Calls C<clGetContextInfo> with C<CL_CONTEXT_DEVICES> and returns the result.
		759
		760	=item @property_ints = $context->properties
		761
		762	Calls C<clGetContextInfo> with C<CL_CONTEXT_PROPERTIES> and returns the result.
		763
		764	=item $uint = $context->num_devices
		765
		766	Calls C<clGetContextInfo> with C<CL_CONTEXT_NUM_DEVICES> and returns the result.
		767
		768	=for gengetinfo end context
		769
		770	=back
		771
		772	=head2 THE OpenCL::Queue CLASS
		773
		774	An OpenCL::Queue represents an execution queue for OpenCL. You execute
		775	requests by calling their respective C<enqueue_xxx> method and waitinf for
		776	it to complete in some way.
		777
		778	All the enqueue methods return an event object that can be used to wait
		779	for completion, unless the method is called in void context, in which case
		780	no event object is created.
		781
		782	They also allow you to specify any number of other event objects that this
		783	request has to wait for before it starts executing, by simply passing the
		784	event objects as extra parameters to the enqueue methods.
		785
		786	Queues execute in-order by default, without any parallelism, so in most
		787	cases (i.e. you use only one queue) it's not necessary to wait for or
		788	create event objects.
		789
		790	=over 4
		791
		792	=item $ev = $queue->enqueue_read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)
		793
		794	Reads data from buffer into the given string.
		795
		796	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>
		797
		798	=item $ev = $queue->enqueue_write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)
		799
		800	Writes data to buffer from the given string.
		801
		802	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>
		803
		804	=item $ev = $queue->enqueue_copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)
		805
		806	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>
		807
		808	=item $ev = $queue->enqueue_read_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)
		809
		810	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBufferRect.html
		811
		812	=item $ev = $queue->enqueue_write_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)
		813
		814	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBufferRect.html
		815
		816	=item $ev = $queue->enqueue_read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
		817
		818	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
		819
		820	=item $ev = $queue->enqueue_copy_buffer_to_image ($src_buffer, $dst_image, $src_offset, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		821
		822	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>
		823
		824	=item $ev = $queue->enqueue_write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
		825
		826	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>
		827
		828	=item $ev = $queue->enqueue_copy_image ($src_image, $dst_image, $src_x, $src_y, $src_z, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		829
		830	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>
		831
		832	=item $ev = $queue->enqueue_copy_image_to_buffer ($src_image, $dst_image, $src_x, $src_y, $src_z, $width, $height, $depth, $dst_offset, $wait_events...)
		833
		834	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
		835
		836	=item $ev = $queue->enqueue_copy_buffer_rect ($src, $dst, $src_x, $src_y, $src_z, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $src_row_pitch, $src_slice_pitch, $dst_row_pitch, $dst_slice_pitch, $wait_event...)
		837
		838	Yeah.
		839
		840	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.
		841
		842	=item $ev = $queue->enqueue_task ($kernel, $wait_events...)
		843
		844	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>
		845
		846	=item $ev = $queue->enqueue_nd_range_kernel ($kernel, @$global_work_offset, @$global_work_size, @$local_work_size, $wait_events...)
		847
		848	Enqueues a kernel execution.
		849
		850	@$global_work_size must be specified as a reference to an array of
		851	integers specifying the work sizes (element counts).
		852
		853	@$global_work_offset must be either C<undef> (in which case all offsets
		854	are C<0>), or a reference to an array of work offsets, with the same number
		855	of elements as @$global_work_size.
		856
		857	@$local_work_size must be either C<undef> (in which case the
		858	implementation is supposed to choose good local work sizes), or a
		859	reference to an array of local work sizes, with the same number of
		860	elements as @$global_work_size.
		861
		862	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>
		863
		864	=item $ev = $queue->enqueue_marker
		865
		866	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html>
		867
		868	=item $ev = $queue->enqueue_wait_for_events ($wait_events...)
		869
		870	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>
		871
		872	=item $queue->enqueue_barrier
		873
		874	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueBarrier.html>
		875
		876	=item $queue->flush
		877
		878	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>
		879
		880	=item $queue->finish
		881
		882	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFinish.html>
		883
		884	=item $packed_value = $queue->info ($name)
		885
		886	See C<< $platform->info >> for details.
		887
		888	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetCommandQueueInfo.html>
		889
		890	=for gengetinfo begin command_queue
		891
		892	=item $ctx = $command_queue->context
		893
		894	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_CONTEXT> and returns the result.
		895
		896	=item $device = $command_queue->device
		897
		898	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_DEVICE> and returns the result.
		899
		900	=item $uint = $command_queue->reference_count
		901
		902	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_REFERENCE_COUNT> and returns the result.
		903
		904	=item $command_queue_properties = $command_queue->properties
		905
		906	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_PROPERTIES> and returns the result.
		907
		908	=for gengetinfo end command_queue
		909
		910	=back
		911
		912	=head2 THE OpenCL::Memory CLASS
		913
		914	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,
		915	OpenCL::Image2D and OpenCL::Image3D.
		916
		917	=over 4
		918
		919	=item $packed_value = $memory->info ($name)
		920
		921	See C<< $platform->info >> for details.
		922
		923	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>
		924
		925	=for gengetinfo begin mem
		926
		927	=item $mem_object_type = $mem->type
		928
		929	Calls C<clGetMemObjectInfo> with C<CL_MEM_TYPE> and returns the result.
		930
		931	=item $mem_flags = $mem->flags
		932
		933	Calls C<clGetMemObjectInfo> with C<CL_MEM_FLAGS> and returns the result.
		934
		935	=item $int = $mem->size
		936
		937	Calls C<clGetMemObjectInfo> with C<CL_MEM_SIZE> and returns the result.
		938
		939	=item $ptr_value = $mem->host_ptr
		940
		941	Calls C<clGetMemObjectInfo> with C<CL_MEM_HOST_PTR> and returns the result.
		942
		943	=item $uint = $mem->map_count
		944
		945	Calls C<clGetMemObjectInfo> with C<CL_MEM_MAP_COUNT> and returns the result.
		946
		947	=item $uint = $mem->reference_count
		948
		949	Calls C<clGetMemObjectInfo> with C<CL_MEM_REFERENCE_COUNT> and returns the result.
		950
		951	=item $ctx = $mem->context
		952
		953	Calls C<clGetMemObjectInfo> with C<CL_MEM_CONTEXT> and returns the result.
		954
		955	=item $mem = $mem->associated_memobject
		956
		957	Calls C<clGetMemObjectInfo> with C<CL_MEM_ASSOCIATED_MEMOBJECT> and returns the result.
		958
		959	=item $int = $mem->offset
		960
		961	Calls C<clGetMemObjectInfo> with C<CL_MEM_OFFSET> and returns the result.
		962
		963	=for gengetinfo end mem
		964
		965	=back
		966
		967	=head2 THE OpenCL::Buffer CLASS
		968
		969	This is a subclass of OpenCL::Memory, and the superclass of
		970	OpenCL::BufferObj. Its purpose is simply to distinguish between buffers
		971	and sub-buffers.
		972
		973	=head2 THE OpenCL::BufferObj CLASS
		974
		975	This is a subclass of OpenCL::Buffer and thus OpenCL::Memory. It exists
		976	because one cna create sub buffers of OpenLC::BufferObj objects, but not
		977	sub buffers from these sub buffers.
		978
		979	=over 4
		980
		981	=item $subbuf = $buf_obj->sub_buffer_region ($flags, $origin, $size)
		982
		983	Creates an OpenCL::Buffer objects from this buffer and returns it. The
		984	C<buffer_create_type> is assumed to be C<CL_BUFFER_CREATE_TYPE_REGION>.
		985
		986	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSubBuffer.html>
		987
		988	=back
		989
		990	=head2 THE OpenCL::Image CLASS
		991
		992	This is the superclass of all image objects - OpenCL::Image2D and OpenCL::Image3D.
		993
		994	=over 4
		995
		996	=item $packed_value = $ev->image_info ($name)
		997
		998	See C<< $platform->info >> for details.
		999
		1000	The reason this method is not called C<info> is that there already is an
		1001	C<< ->info >> method inherited from C<OpenCL::Memory>.
		1002
		1003	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>
		1004
		1005	=for gengetinfo begin image
		1006
		1007	=item $int = $image->element_size
		1008
		1009	Calls C<clGetImageInfo> with C<CL_IMAGE_ELEMENT_SIZE> and returns the result.
		1010
		1011	=item $int = $image->row_pitch
		1012
		1013	Calls C<clGetImageInfo> with C<CL_IMAGE_ROW_PITCH> and returns the result.
		1014
		1015	=item $int = $image->slice_pitch
		1016
		1017	Calls C<clGetImageInfo> with C<CL_IMAGE_SLICE_PITCH> and returns the result.
		1018
		1019	=item $int = $image->width
		1020
		1021	Calls C<clGetImageInfo> with C<CL_IMAGE_WIDTH> and returns the result.
		1022
		1023	=item $int = $image->height
		1024
		1025	Calls C<clGetImageInfo> with C<CL_IMAGE_HEIGHT> and returns the result.
		1026
		1027	=item $int = $image->depth
		1028
		1029	Calls C<clGetImageInfo> with C<CL_IMAGE_DEPTH> and returns the result.
		1030
		1031	=for gengetinfo end image
		1032
		1033	=back
		1034
		1035	=head2 THE OpenCL::Sampler CLASS
		1036
		1037	=over 4
		1038
		1039	=item $packed_value = $sampler->info ($name)
		1040
		1041	See C<< $platform->info >> for details.
		1042
		1043	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetSamplerInfo.html>
		1044
		1045	=for gengetinfo begin sampler
		1046
		1047	=item $uint = $sampler->reference_count
		1048
		1049	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_REFERENCE_COUNT> and returns the result.
		1050
		1051	=item $ctx = $sampler->context
		1052
		1053	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_CONTEXT> and returns the result.
		1054
		1055	=item $addressing_mode = $sampler->normalized_coords
		1056
		1057	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_NORMALIZED_COORDS> and returns the result.
		1058
		1059	=item $filter_mode = $sampler->addressing_mode
		1060
		1061	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_ADDRESSING_MODE> and returns the result.
		1062
		1063	=item $boolean = $sampler->filter_mode
		1064
		1065	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_FILTER_MODE> and returns the result.
		1066
		1067	=for gengetinfo end sampler
		1068
		1069	=back
		1070
		1071	=head2 THE OpenCL::Program CLASS
		1072
		1073	=over 4
		1074
		1075	=item $program->build ($device, $options = "")
		1076
		1077	Tries to build the program with the givne options.
		1078
		1079	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>
		1080
		1081	=item $packed_value = $program->build_info ($device, $name)
		1082
		1083	Similar to C<< $platform->info >>, but returns build info for a previous
		1084	build attempt for the given device.
		1085
		1086	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetBuildInfo.html>
		1087
		1088	=item $kernel = $program->kernel ($function_name)
		1089
		1090	Creates an OpenCL::Kernel object out of the named C<__kernel> function in
		1091	the program.
		1092
		1093	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>
		1094
		1095	=for gengetinfo begin program_build
		1096
		1097	=item $build_status = $program->build_status ($device)
		1098
		1099	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_STATUS> and returns the result.
		1100
		1101	=item $string = $program->build_options ($device)
		1102
		1103	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_OPTIONS> and returns the result.
		1104
		1105	=item $string = $program->build_log ($device)
		1106
		1107	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_LOG> and returns the result.
		1108
		1109	=for gengetinfo end program_build
		1110
		1111	=item $packed_value = $program->info ($name)
		1112
		1113	See C<< $platform->info >> for details.
		1114
		1115	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1116
		1117	=for gengetinfo begin program
		1118
		1119	=item $uint = $program->reference_count
		1120
		1121	Calls C<clGetProgramInfo> with C<CL_PROGRAM_REFERENCE_COUNT> and returns the result.
		1122
		1123	=item $ctx = $program->context
		1124
		1125	Calls C<clGetProgramInfo> with C<CL_PROGRAM_CONTEXT> and returns the result.
		1126
		1127	=item $uint = $program->num_devices
		1128
		1129	Calls C<clGetProgramInfo> with C<CL_PROGRAM_NUM_DEVICES> and returns the result.
		1130
		1131	=item @devices = $program->devices
		1132
		1133	Calls C<clGetProgramInfo> with C<CL_PROGRAM_DEVICES> and returns the result.
		1134
		1135	=item $string = $program->source
		1136
		1137	Calls C<clGetProgramInfo> with C<CL_PROGRAM_SOURCE> and returns the result.
		1138
		1139	=item @ints = $program->binary_sizes
		1140
		1141	Calls C<clGetProgramInfo> with C<CL_PROGRAM_BINARY_SIZES> and returns the result.
		1142
		1143	=for gengetinfo end program
		1144
		1145	=item @blobs = $program->binaries
		1146
		1147	Returns a string for the compiled binary for every device associated with
		1148	the program, empty strings indicate missing programs, and an empty result
		1149	means no program binaries are available.
		1150
		1151	These "binaries" are often, in fact, informative low-level assembly
		1152	sources.
		1153
		1154	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1155
		1156	=back
		1157
		1158	=head2 THE OpenCL::Kernel CLASS
		1159
		1160	=over 4
		1161
		1162	=item $packed_value = $kernel->info ($name)
		1163
		1164	See C<< $platform->info >> for details.
		1165
		1166	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelInfo.html>
		1167
		1168	=for gengetinfo begin kernel
		1169
		1170	=item $string = $kernel->function_name
		1171
		1172	Calls C<clGetKernelInfo> with C<CL_KERNEL_FUNCTION_NAME> and returns the result.
		1173
		1174	=item $uint = $kernel->num_args
		1175
		1176	Calls C<clGetKernelInfo> with C<CL_KERNEL_NUM_ARGS> and returns the result.
		1177
		1178	=item $uint = $kernel->reference_count
		1179
		1180	Calls C<clGetKernelInfo> with C<CL_KERNEL_REFERENCE_COUNT> and returns the result.
		1181
		1182	=item $ctx = $kernel->context
		1183
		1184	Calls C<clGetKernelInfo> with C<CL_KERNEL_CONTEXT> and returns the result.
		1185
		1186	=item $program = $kernel->program
		1187
		1188	Calls C<clGetKernelInfo> with C<CL_KERNEL_PROGRAM> and returns the result.
		1189
		1190	=for gengetinfo end kernel
		1191
		1192	=item $packed_value = $kernel->work_group_info ($device, $name)
		1193
		1194	See C<< $platform->info >> for details.
		1195
		1196	The reason this method is not called C<info> is that there already is an
		1197	C<< ->info >> method.
		1198
		1199	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
		1200
		1201	=for gengetinfo begin kernel_work_group
		1202
		1203	=item $int = $kernel->work_group_size ($device)
		1204
		1205	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_WORK_GROUP_SIZE> and returns the result.
		1206
		1207	=item @ints = $kernel->compile_work_group_size ($device)
		1208
		1209	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result.
		1210
		1211	=item $ulong = $kernel->local_mem_size ($device)
		1212
		1213	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_LOCAL_MEM_SIZE> and returns the result.
		1214
		1215	=item $int = $kernel->preferred_work_group_size_multiple ($device)
		1216
		1217	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result.
		1218
		1219	=item $ulong = $kernel->private_mem_size ($device)
		1220
		1221	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PRIVATE_MEM_SIZE> and returns the result.
		1222
		1223	=for gengetinfo end kernel_work_group
		1224
		1225	=item $kernel->set_TYPE ($index, $value)
		1226
		1227	This is a family of methods to set the kernel argument with the number C<$index> to the give C<$value>.
		1228
		1229	TYPE is one of C<char>, C<uchar>, C<short>, C<ushort>, C<int>, C<uint>,
		1230	C<long>, C<ulong>, C<half>, C<float>, C<double>, C<memory>, C<buffer>,
		1231	C<image2d>, C<image3d>, C<sampler> or C<event>.
		1232
		1233	Chars and integers (including the half type) are specified as integers,
		1234	float and double as floating point values, memory/buffer/image2d/image3d
		1235	must be an object of that type or C<undef>, and sampler and event must be
		1236	objects of that type.
		1237
		1238	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>
		1239
		1240	=back
		1241
		1242	=head2 THE OpenCL::Event CLASS
		1243
		1244	This is the superclass for all event objects (including OpenCL::UserEvent
		1245	objects).
		1246
		1247	=over 4
		1248
		1249	=item $ev->wait
		1250
		1251	Waits for the event to complete.
		1252
		1253	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
		1254
		1255	=item $packed_value = $ev->info ($name)
		1256
		1257	See C<< $platform->info >> for details.
		1258
		1259	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
		1260
		1261	=for gengetinfo begin event
		1262
		1263	=item $queue = $event->command_queue
		1264
		1265	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_QUEUE> and returns the result.
		1266
		1267	=item $command_type = $event->command_type
		1268
		1269	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_TYPE> and returns the result.
		1270
		1271	=item $uint = $event->reference_count
		1272
		1273	Calls C<clGetEventInfo> with C<CL_EVENT_REFERENCE_COUNT> and returns the result.
		1274
		1275	=item $uint = $event->command_execution_status
		1276
		1277	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_EXECUTION_STATUS> and returns the result.
		1278
		1279	=item $ctx = $event->context
		1280
		1281	Calls C<clGetEventInfo> with C<CL_EVENT_CONTEXT> and returns the result.
		1282
		1283	=for gengetinfo end event
		1284
		1285	=item $packed_value = $ev->profiling_info ($name)
		1286
		1287	See C<< $platform->info >> for details.
		1288
		1289	The reason this method is not called C<info> is that there already is an
		1290	C<< ->info >> method.
		1291
		1292	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
		1293
		1294	=for gengetinfo begin profiling
		1295
		1296	=item $ulong = $event->profiling_command_queued
		1297
		1298	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_QUEUED> and returns the result.
		1299
		1300	=item $ulong = $event->profiling_command_submit
		1301
		1302	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_SUBMIT> and returns the result.
		1303
		1304	=item $ulong = $event->profiling_command_start
		1305
		1306	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_START> and returns the result.
		1307
		1308	=item $ulong = $event->profiling_command_end
		1309
		1310	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_END> and returns the result.
		1311
		1312	=for gengetinfo end profiling
		1313
		1314	=back
		1315
		1316	=head2 THE OpenCL::UserEvent CLASS
		1317
		1318	This is a subclass of OpenCL::Event.
		1319
		1320	=over 4
		1321
		1322	=item $ev->set_status ($execution_status)
		1323
		1324	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>
		1325
		1326	=back
		1327
87	=cut	1328	=cut
88		1329
89	package OpenCL;	1330	package OpenCL;
90		1331
91	use common::sense;	1332	use common::sense;
92		1333
93	BEGIN {	1334	BEGIN {
94	our $VERSION = '0.01';	1335	our $VERSION = '0.92';
95		1336
96	require XSLoader;	1337	require XSLoader;
97	XSLoader::load (__PACKAGE__, $VERSION);	1338	XSLoader::load (__PACKAGE__, $VERSION);
98		1339
99	@OpenCL::Buffer::ISA =	1340	@OpenCL::Buffer::ISA =
100	@OpenCL::Image::ISA = OpenCL::Memory::;	1341	@OpenCL::Image::ISA = OpenCL::Memory::;
101		1342
		1343	@OpenCL::BufferObj::ISA = OpenCL::Buffer::;
		1344
102	@OpenCL::Image2D::ISA =	1345	@OpenCL::Image2D::ISA =
103	@OpenCL::Image3D::ISA = OpenCL::Image::;	1346	@OpenCL::Image3D::ISA = OpenCL::Image::;
		1347
		1348	@OpenCL::UserEvent::ISA = OpenCL::Event::;
104	}	1349	}
105		1350
106	1;	1351	1;
107
108	=back
109		1352
110	=head1 AUTHOR	1353	=head1 AUTHOR
111		1354
112	Marc Lehmann <schmorp@schmorp.de>	1355	Marc Lehmann <schmorp@schmorp.de>
113	http://home.schmorp.de/	1356	http://home.schmorp.de/

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