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Revision 1.22 by root, Sun Nov 20 10:25:17 2011 UTC vs.
Revision 1.88 by root, Tue Oct 22 17:25:38 2013 UTC

…		…
28	specific device ("compiling and linking"), also binary programs. For each	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	29	kernel function in a program you can then create an OpenCL::Kernel object
30	which represents basically a function call with argument values.	30	which represents basically a function call with argument values.
31		31
32	OpenCL::Memory objects of various flavours: OpenCL::Buffer objects (flat	32	OpenCL::Memory objects of various flavours: OpenCL::Buffer objects (flat
33	memory areas, think arrays or structs) and OpenCL::Image objects (think 2d	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.	34	or 3D array) for bulk data and input and output for kernels.
35		35
36	OpenCL::Sampler objects, which are kind of like texture filter modes in	36	OpenCL::Sampler objects, which are kind of like texture filter modes in
37	OpenGL.	37	OpenGL.
38		38
39	OpenCL::Queue objects - command queues, which allow you to submit memory	39	OpenCL::Queue objects - command queues, which allow you to submit memory
…		…
43		43
44	OpenCL::Event objects are used to signal when something is complete.	44	OpenCL::Event objects are used to signal when something is complete.
45		45
46	=head2 HELPFUL RESOURCES	46	=head2 HELPFUL RESOURCES
47		47
48	The OpenCL spec used to develop this module (1.2 spec was available, but	48	The OpenCL specs used to develop this module - download these and keept
49	no implementation was available to me :).	49	hema round, they are required reference material:
50		50
51	http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf	51	http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf
		52	http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf
		53	http://www.khronos.org/registry/cl/specs/opencl-1.2-extensions.pdf
52		54
53	OpenCL manpages:	55	OpenCL manpages:
54		56
55	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/	57	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/
		58	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/
56		59
57	If you are into UML class diagrams, the following diagram might help - if	60	If you are into UML class diagrams, the following diagram might help - if
58	not, it will be mildly cobfusing:	61	not, it will be mildly confusing (also, the class hierarchy of this module
		62	is much more fine-grained):
59		63
60	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/classDiagram.html	64	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/classDiagram.html
61		65
62	Here's a tutorial from AMD (very AMD-centric, too), not sure how useful it	66	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:	67	is, but at least it's free of charge:
64		68
65	http://developer.amd.com/zones/OpenCLZone/courses/Documents/Introduction_to_OpenCL_Programming%20Training_Guide%20%28201005%29.pdf	69	http://developer.amd.com/zones/OpenCLZone/courses/Documents/Introduction_to_OpenCL_Programming%20Training_Guide%20%28201005%29.pdf
…		…
101		105
102	Best run this once to get a feel for the platforms and devices in your	106	Best run this once to get a feel for the platforms and devices in your
103	system.	107	system.
104		108
105	for my $platform (OpenCL::platforms) {	109	for my $platform (OpenCL::platforms) {
106	printf "platform: %s\n", $platform->info (OpenCL::PLATFORM_NAME);	110	printf "platform: %s\n", $platform->name;
107	printf "extensions: %s\n", $platform->info (OpenCL::PLATFORM_EXTENSIONS);	111	printf "extensions: %s\n", $platform->extensions;
108	for my $device ($platform->devices) {	112	for my $device ($platform->devices) {
109	printf "+ device: %s\n", $device->info (OpenCL::DEVICE_NAME);	113	printf "+ device: %s\n", $device->name;
110	my $ctx = $device->context;	114	my $ctx = $platform->context (undef, [$device]);
111	# do stuff	115	# do stuff
112	}	116	}
113	}	117	}
114		118
115	=head2 Get a useful context and a command queue.	119	=head2 Get a useful context and a command queue.
…		…
138	=head2 Create a buffer with some predefined data, read it back synchronously,	142	=head2 Create a buffer with some predefined data, read it back synchronously,
139	then asynchronously.	143	then asynchronously.
140		144
141	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");	145	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");
142		146
143	$queue->enqueue_read_buffer ($buf, 1, 1, 3, my $data);	147	$queue->read_buffer ($buf, 1, 1, 3, my $data);
144	print "$data\n";	148	print "$data\n";
145		149
146	my $ev = $queue->enqueue_read_buffer ($buf, 0, 1, 3, my $data);	150	my $ev = $queue->read_buffer ($buf, 0, 1, 3, my $data);
147	$ev->wait;	151	$ev->wait;
148	print "$data\n"; # prints "elm"	152	print "$data\n"; # prints "elm"
149		153
150	=head2 Create and build a program, then create a kernel out of one of its	154	=head2 Create and build a program, then create a kernel out of one of its
151	functions.	155	functions.
152		156
153	my $src = '	157	my $src = '
154	__kernel void	158	kernel void
155	squareit (__global float *input, __global float *output)	159	squareit (global float *input, global float *output)
156	{	160	{
157	$id = get_global_id (0);	161	$id = get_global_id (0);
158	output [id] = input [id] * input [id];	162	output [id] = input [id] * input [id];
159	}	163	}
160	';	164	';
161		165
162	my $prog = $ctx->program_with_source ($src);	166	my $prog = $ctx->build_program ($src);
163
164	# build croaks on compile errors, so catch it and print the compile errors
165	eval { $prog->build ($dev); 1 }
166	or die $prog->build_info ($dev, OpenCL::PROGRAM_BUILD_LOG);
167
168	my $kernel = $prog->kernel ("squareit");	167	my $kernel = $prog->kernel ("squareit");
169		168
170	=head2 Create some input and output float buffers, then call the	169	=head2 Create some input and output float buffers, then call the
171	'squareit' kernel on them.	170	'squareit' kernel on them.
172		171
…		…
176	# set buffer	175	# set buffer
177	$kernel->set_buffer (0, $input);	176	$kernel->set_buffer (0, $input);
178	$kernel->set_buffer (1, $output);	177	$kernel->set_buffer (1, $output);
179		178
180	# execute it for all 4 numbers	179	# execute it for all 4 numbers
181	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	180	$queue->nd_range_kernel ($kernel, undef, [4], undef);
182		181
183	# enqueue a synchronous read	182	# enqueue a synchronous read
184	$queue->enqueue_read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	183	$queue->read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
185		184
186	# print the results:	185	# print the results:
187	printf "%s\n", join ", ", unpack "f*", $data;	186	printf "%s\n", join ", ", unpack "f*", $data;
188		187
189	=head2 The same enqueue operations as before, but assuming an out-of-order queue,	188	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
190	showing off barriers.	189	showing off barriers.
191		190
192	# execute it for all 4 numbers	191	# execute it for all 4 numbers
193	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	192	$queue->nd_range_kernel ($kernel, undef, [4], undef);
194		193
195	# enqueue a barrier to ensure in-order execution	194	# enqueue a barrier to ensure in-order execution
196	$queue->enqueue_barrier;	195	$queue->barrier;
197		196
198	# enqueue an async read	197	# enqueue an async read
199	$queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	198	$queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
200		199
201	# wait for all requests to finish	200	# wait for all requests to finish
202	$queue->finish;	201	$queue->finish;
203		202
204	=head2 The same enqueue operations as before, but assuming an out-of-order queue,	203	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
205	showing off event objects and wait lists.	204	showing off event objects and wait lists.
206		205
207	# execute it for all 4 numbers	206	# execute it for all 4 numbers
208	my $ev = $queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	207	my $ev = $queue->nd_range_kernel ($kernel, undef, [4], undef);
209		208
210	# enqueue an async read	209	# enqueue an async read
211	$ev = $queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);	210	$ev = $queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);
212		211
213	# wait for the last event to complete	212	# wait for the last event to complete
214	$ev->wait;	213	$ev->wait;
		214
		215	=head2 Use the OpenGL module to share a texture between OpenCL and OpenGL and draw some julia
		216	set flight effect.
		217
		218	This is quite a long example to get you going - you can also download it
		219	from L<http://cvs.schmorp.de/OpenCL/examples/juliaflight>.
		220
		221	use OpenGL ":all";
		222	use OpenCL;
		223
		224	my $S = $ARGV[0] || 256; # window/texture size, smaller is faster
		225
		226	# open a window and create a gl texture
		227	OpenGL::glpOpenWindow width => $S, height => $S;
		228	my $texid = glGenTextures_p 1;
		229	glBindTexture GL_TEXTURE_2D, $texid;
		230	glTexImage2D_c GL_TEXTURE_2D, 0, GL_RGBA8, $S, $S, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0;
		231
		232	# find and use the first opencl device that let's us get a shared opengl context
		233	my $platform;
		234	my $dev;
		235	my $ctx;
		236
		237	sub get_context {
		238	for (OpenCL::platforms) {
		239	$platform = $_;
		240	for ($platform->devices) {
		241	$dev = $_;
		242	$ctx = eval { $platform->context ([OpenCL::GLX_DISPLAY_KHR, undef, OpenCL::GL_CONTEXT_KHR, undef], [$dev]) }
		243	and return;
		244	}
		245	}
		246
		247	die "cannot find suitable OpenCL device\n";
		248	}
		249
		250	get_context;
		251
		252	my $queue = $ctx->queue ($dev);
		253
		254	# now attach an opencl image2d object to the opengl texture
		255	my $tex = $ctx->gl_texture2d (OpenCL::MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, $texid);
		256
		257	# now the boring opencl code
		258	my $src = <<EOF;
		259	kernel void
		260	juliatunnel (write_only image2d_t img, float time)
		261	{
		262	int2 xy = (int2)(get_global_id (0), get_global_id (1));
		263	float2 p = convert_float2 (xy) / $S.f * 2.f - 1.f;
		264
		265	float2 m = (float2)(1.f, p.y) / fabs (p.x); // tunnel
		266	m.x = fabs (fmod (m.x + time * 0.05f, 4.f) - 2.f);
		267
		268	float2 z = m;
		269	float2 c = (float2)(sin (time * 0.01133f), cos (time * 0.02521f));
		270
		271	for (int i = 0; i < 25 && dot (z, z) < 4.f; ++i) // standard julia
		272	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		273
		274	float3 colour = (float3)(z.x, z.y, atan2 (z.y, z.x));
		275	write_imagef (img, xy, (float4)(colour * p.x * p.x, 1.));
		276	}
		277	EOF
		278
		279	my $prog = $ctx->build_program ($src);
		280	my $kernel = $prog->kernel ("juliatunnel");
		281
		282	# program compiled, kernel ready, now draw and loop
		283
		284	for (my $time; ; ++$time) {
		285	# acquire objects from opengl
		286	$queue->acquire_gl_objects ([$tex]);
		287
		288	# configure and run our kernel
		289	$kernel->setf ("mf", $tex, $time*2); # mf = memory object, float
		290	$queue->nd_range_kernel ($kernel, undef, [$S, $S], undef);
		291
		292	# release objects to opengl again
		293	$queue->release_gl_objects ([$tex]);
		294
		295	# wait
		296	$queue->finish;
		297
		298	# now draw the texture, the defaults should be all right
		299	glTexParameterf GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST;
		300
		301	glEnable GL_TEXTURE_2D;
		302	glBegin GL_QUADS;
		303	glTexCoord2f 0, 1; glVertex3i -1, -1, -1;
		304	glTexCoord2f 0, 0; glVertex3i 1, -1, -1;
		305	glTexCoord2f 1, 0; glVertex3i 1, 1, -1;
		306	glTexCoord2f 1, 1; glVertex3i -1, 1, -1;
		307	glEnd;
		308
		309	glXSwapBuffers;
		310
		311	select undef, undef, undef, 1/60;
		312	}
		313
		314	=head2 How to modify the previous example to not rely on GL sharing.
		315
		316	For those poor souls with only a sucky CPU OpenCL implementation, you
		317	currently have to read the image into some perl scalar, and then modify a
		318	texture or use glDrawPixels or so).
		319
		320	First, when you don't need gl sharing, you can create the context much simpler:
		321
		322	$ctx = $platform->context (undef, [$dev])
		323
		324	To use a texture, you would modify the above example by creating an
		325	OpenCL::Image manually instead of deriving it from a texture:
		326
		327	my $tex = $ctx->image2d (OpenCL::MEM_WRITE_ONLY, OpenCL::RGBA, OpenCL::UNORM_INT8, $S, $S);
		328
		329	And in the draw loop, intead of acquire_gl_objects/release_gl_objects, you
		330	would read the image2d after the kernel has written it:
		331
		332	$queue->read_image ($tex, 0, 0, 0, 0, $S, $S, 1, 0, 0, my $data);
		333
		334	And then you would upload the pixel data to the texture (or use glDrawPixels):
		335
		336	glTexSubImage2D_s GL_TEXTURE_2D, 0, 0, 0, $S, $S, GL_RGBA, GL_UNSIGNED_BYTE, $data;
		337
		338	The fully modified example can be found at
		339	L<http://cvs.schmorp.de/OpenCL/examples/juliaflight-nosharing>.
		340
		341	=head2 Julia sets look soooo 80ies.
		342
		343	Then colour them differently, e.g. using orbit traps! Replace the loop and
		344	colour calculation from the previous examples by this:
		345
		346	float2 dm = (float2)(1.f, 1.f);
		347
		348	for (int i = 0; i < 25; ++i)
		349	{
		350	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		351	dm = fmin (dm, (float2)(fabs (dot (z, z) - 1.f), fabs (z.x - 1.f)));
		352	}
		353
		354	float3 colour = (float3)(dm.x * dm.y, dm.x * dm.y, dm.x);
		355
		356	Also try C<-10.f> instead of C<-1.f>.
215		357
216	=head1 DOCUMENTATION	358	=head1 DOCUMENTATION
217		359
218	=head2 BASIC CONVENTIONS	360	=head2 BASIC CONVENTIONS
219		361
…		…
241	=item * Structures are often specified by flattening out their components	383	=item * Structures are often specified by flattening out their components
242	as with short vectors, and returned as arrayrefs.	384	as with short vectors, and returned as arrayrefs.
243		385
244	=item * When enqueuing commands, the wait list is specified by adding	386	=item * When enqueuing commands, the wait list is specified by adding
245	extra arguments to the function - anywhere a C<$wait_events...> argument	387	extra arguments to the function - anywhere a C<$wait_events...> argument
246	is documented this can be any number of event objects.	388	is documented this can be any number of event objects. As an extsnion
		389	implemented by this module, C<undef> values will be ignored in the event
		390	list.
247		391
248	=item * When enqueuing commands, if the enqueue method is called in void	392	=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	393	context, no event is created. In all other contexts an event is returned
250	by the method.	394	by the method.
251		395
252	=item * This module expects all functions to return C<CL_SUCCESS>. If any	396	=item * This module expects all functions to return C<OpenCL::SUCCESS>. If any
253	other status is returned the function will throw an exception, so you	397	other status is returned the function will throw an exception, so you
254	don't normally have to to any error checking.	398	don't normally have to to any error checking.
255		399
256	=back	400	=back
		401
		402	=head2 CONSTANTS
		403
		404	All C<CL_xxx> constants that this module supports are always available
		405	in the C<OpenCL> namespace as C<OpenCL::xxx> (i.e. without the C<CL_>
		406	prefix). Constants which are not defined in the header files used during
		407	compilation, or otherwise are not available, will have the value C<0> (in
		408	some cases, this will make them indistinguishable from real constants,
		409	sorry).
		410
		411	The latest version of this module knows and exports the constants
		412	listed in L<http://cvs.schmorp.de/OpenCL/constiv.h>.
		413
		414	=head2 OPENCL 1.1 VS. OPENCL 1.2
		415
		416	This module supports both OpenCL version 1.1 and 1.2, although the OpenCL
		417	1.2 interface hasn't been tested much for lack of availability of an
		418	actual implementation.
		419
		420	Every function or method in this manual page that interfaces to a
		421	particular OpenCL function has a link to the its C manual page.
		422
		423	If the link contains a F<1.1>, then this function is an OpenCL 1.1
		424	function. Most but not all also exist in OpenCL 1.2, and this module
		425	tries to emulate the missing ones for you, when told to do so at
		426	compiletime. You can check whether a function was removed in OpenCL 1.2 by
		427	replacing the F<1.1> component in the URL by F<1.2>.
		428
		429	If the link contains a F<1.2>, then this is a OpenCL 1.2-only
		430	function. Even if the module was compiled with OpenCL 1.2 header files
		431	and has an 1.2 OpenCL library, calling such a function on a platform that
		432	doesn't implement 1.2 causes undefined behaviour, usually a crash (But
		433	this is not guaranteed).
		434
		435	You can find out whether this module was compiled to prefer 1.1
		436	functionality by ooking at C<OpenCL::PREFER_1_1> - if it is true, then
		437	1.1 functions generally are implemented using 1.1 OpenCL functions. If it
		438	is false, then 1.1 functions missing from 1.2 are emulated by calling 1.2
		439	fucntions.
		440
		441	This is a somewhat sorry state of affairs, but the Khronos group choose to
		442	make every release of OpenCL source and binary incompatible with previous
		443	releases.
257		444
258	=head2 PERL AND OPENCL TYPES	445	=head2 PERL AND OPENCL TYPES
259		446
260	This handy(?) table lists OpenCL types and their perl, PDL and pack/unpack	447	This handy(?) table lists OpenCL types and their perl, PDL and pack/unpack
261	format equivalents:	448	format equivalents:
…		…
271	ulong IV - Q	458	ulong IV - Q
272	float NV float f	459	float NV float f
273	half IV ushort S	460	half IV ushort S
274	double NV double d	461	double NV double d
275		462
		463	=head2 GLX SUPPORT
		464
		465	Due to the sad state that OpenGL support is in in Perl (mostly the OpenGL
		466	module, which has little to no documentation and has little to no support
		467	for glX), this module, as a special extension, treats context creation
		468	properties C<OpenCL::GLX_DISPLAY_KHR> and C<OpenCL::GL_CONTEXT_KHR>
		469	specially: If either or both of these are C<undef>, then the OpenCL
		470	module tries to dynamically resolve C<glXGetCurrentDisplay> and
		471	C<glXGetCurrentContext>, call these functions and use their return values
		472	instead.
		473
		474	For this to work, the OpenGL library must be loaded, a GLX context must
		475	have been created and be made current, and C<dlsym> must be available and
		476	capable of finding the function via C<RTLD_DEFAULT>.
		477
		478	=head2 EVENT SYSTEM
		479
		480	OpenCL can generate a number of (potentially) asynchronous events, for
		481	example, after compiling a program, to signal a context-related error or,
		482	perhaps most important, to signal completion of queued jobs (by setting
		483	callbacks on OpenCL::Event objects).
		484
		485	The OpenCL module converts all these callbacks into events - you can
		486	still register callbacks, but they are not executed when your OpenCL
		487	implementation calls the actual callback, but only later. Therefore, none
		488	of the limitations of OpenCL callbacks apply to the perl implementation:
		489	it is perfectly safe to make blocking operations from event callbacks, and
		490	enqueued operations don't need to be flushed.
		491
		492	To facilitate this, this module maintains an event queue - each
		493	time an asynchronous event happens, it is queued, and perl will be
		494	interrupted. This is implemented via the L<Async::Interrupt> module. In
		495	addition, this module has L<AnyEvent> support, so it can seamlessly
		496	integrate itself into many event loops.
		497
		498	Since L<Async::Interrupt> is a bit hard to understand, here are some case examples:
		499
		500	=head3 Don't use callbacks.
		501
		502	When your program never uses any callbacks, then there will never be any
		503	notifications you need to take care of, and therefore no need to worry
		504	about all this.
		505
		506	You can achieve a great deal by explicitly waiting for events, or using
		507	barriers and flush calls. In many programs, there is no need at all to
		508	tinker with asynchronous events.
		509
		510	=head3 Use AnyEvent
		511
		512	This module automatically registers a watcher that invokes all outstanding
		513	event callbacks when AnyEvent is initialised (and block asynchronous
		514	interruptions). Using this mode of operations is the safest and most
		515	recommended one.
		516
		517	To use this, simply use AnyEvent and this module normally, make sure you
		518	have an event loop running:
		519
		520	use Gtk2 -init;
		521	use AnyEvent;
		522
		523	# initialise AnyEvent, by creating a watcher, or:
		524	AnyEvent::detect;
		525
		526	my $e = $queue->marker;
		527	$e->cb (sub {
		528	warn "opencl is finished\n";
		529	})
		530
		531	main Gtk2;
		532
		533	Note that this module will not initialise AnyEvent for you. Before
		534	AnyEvent is initialised, the module will asynchronously interrupt perl
		535	instead. To avoid any surprises, it's best to explicitly initialise
		536	AnyEvent.
		537
		538	You can temporarily enable asynchronous interruptions (see next paragraph)
		539	by calling C<$OpenCL::INTERRUPT->unblock> and disable them again by
		540	calling C<$OpenCL::INTERRUPT->block>.
		541
		542	=head3 Let yourself be interrupted at any time
		543
		544	This mode is the default unless AnyEvent is loaded and initialised. In
		545	this mode, OpenCL asynchronously interrupts a running perl program. The
		546	emphasis is on both I<asynchronously> and I<running> here.
		547
		548	Asynchronously means that perl might execute your callbacks at any
		549	time. For example, in the following code (I<THAT YOU SHOULD NOT COPY>),
		550	the C<until> loop following the marker call will be interrupted by the
		551	callback:
		552
		553	my $e = $queue->marker;
		554	my $flag;
		555	$e->cb (sub { $flag = 1 });
		556	1 until $flag;
		557	# $flag is now 1
		558
		559	The reason why you shouldn't blindly copy the above code is that
		560	busy waiting is a really really bad thing, and really really bad for
		561	performance.
		562
		563	While at first this asynchronous business might look exciting, it can be
		564	really hard, because you need to be prepared for the callback code to be
		565	executed at any time, which limits the amount of things the callback code
		566	can do safely.
		567
		568	This can be mitigated somewhat by using C<<
		569	$OpenCL::INTERRUPT->scope_block >> (see the L<Async::Interrupt>
		570	documentation for details).
		571
		572	The other problem is that your program must be actively I<running> to be
		573	interrupted. When you calculate stuff, your program is running. When you
		574	hang in some C functions or other block execution (by calling C<sleep>,
		575	C<select>, running an event loop and so on), your program is waiting, not
		576	running.
		577
		578	One way around that would be to attach a read watcher to your event loop,
		579	listening for events on C<< $OpenCL::INTERRUPT->pipe_fileno >>, using a
		580	dummy callback (C<sub { }>) to temporarily execute some perl code.
		581
		582	That is then awfully close to using the built-in AnyEvent support above,
		583	though, so consider that one instead.
		584
		585	=head3 Be creative
		586
		587	OpenCL exports the L<Async::Interrupt> object it uses in the global
		588	variable C<$OpenCL::INTERRUPT>. You can configure it in any way you like.
		589
		590	So if you want to feel like a real pro, err, wait, if you feel no risk
		591	menas no fun, you can experiment by implementing your own mode of
		592	operations.
		593
		594	=cut
		595
		596	package OpenCL;
		597
		598	use common::sense;
		599	use Carp ();
		600	use Async::Interrupt ();
		601
		602	our $POLL_FUNC; # set by XS
		603
		604	BEGIN {
		605	our $VERSION = '1.01';
		606
		607	require XSLoader;
		608	XSLoader::load (__PACKAGE__, $VERSION);
		609
		610	@OpenCL::Platform::ISA =
		611	@OpenCL::Device::ISA =
		612	@OpenCL::Context::ISA =
		613	@OpenCL::Queue::ISA =
		614	@OpenCL::Memory::ISA =
		615	@OpenCL::Sampler::ISA =
		616	@OpenCL::Program::ISA =
		617	@OpenCL::Kernel::ISA =
		618	@OpenCL::Event::ISA = OpenCL::Object::;
		619
		620	@OpenCL::SubDevice::ISA = OpenCL::Device::;
		621
		622	@OpenCL::Buffer::ISA =
		623	@OpenCL::Image::ISA = OpenCL::Memory::;
		624
		625	@OpenCL::BufferObj::ISA = OpenCL::Buffer::;
		626
		627	@OpenCL::Image2D::ISA =
		628	@OpenCL::Image3D::ISA =
		629	@OpenCL::Image2DArray::ISA =
		630	@OpenCL::Image1D::ISA =
		631	@OpenCL::Image1DArray::ISA =
		632	@OpenCL::Image1DBuffer::ISA = OpenCL::Image::;
		633
		634	@OpenCL::UserEvent::ISA = OpenCL::Event::;
		635
		636	@OpenCL::MappedBuffer::ISA =
		637	@OpenCL::MappedImage::ISA = OpenCL::Mapped::;
		638	}
		639
276	=head2 THE OpenCL PACKAGE	640	=head2 THE OpenCL PACKAGE
277		641
278	=over 4	642	=over 4
279		643
280	=item $int = OpenCL::errno	644	=item $int = OpenCL::errno
281		645
282	The last error returned by a function - it's only valid after an error occured	646	The last error returned by a function - it's only valid after an error occured
283	and before calling another OpenCL function.	647	and before calling another OpenCL function.
284		648
285	=item $str = OpenCL::err2str $errval	649	=item $str = OpenCL::err2str [$errval]
286		650
287	Comverts an error value into a human readable string.	651	Converts an error value into a human readable string. If no error value is
		652	given, then the last error will be used (as returned by OpenCL::errno).
		653
		654	The latest version of this module knows the error constants
		655	listed in L<http://cvs.schmorp.de/OpenCL/errstr.h>.
288		656
289	=item $str = OpenCL::enum2str $enum	657	=item $str = OpenCL::enum2str $enum
290		658
291	Converts most enum values (inof parameter names, image format constants,	659	Converts most enum values (of parameter names, image format constants,
292	object types, addressing and filter modes, command types etc.) into a	660	object types, addressing and filter modes, command types etc.) into a
293	human readbale string. When confronted with some random integer it can be	661	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	662	very helpful to pass it through this function to maybe get some readable
295	string out of it.	663	string out of it.
296		664
		665	The latest version of this module knows the enumaration constants
		666	listed in L<http://cvs.schmorp.de/OpenCL/enumstr.h>.
		667
297	=item @platforms = OpenCL::platforms	668	=item @platforms = OpenCL::platforms
298		669
299	Returns all available OpenCL::Platform objects.	670	Returns all available OpenCL::Platform objects.
300		671
301	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>	672	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>
302		673
303	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef	674	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr
304		675
305	Tries to create a context from a default device and platform - never worked for me.	676	Tries to create a context from a default device and platform type - never worked for me.
		677	Consider using C<< $platform->context_from_type >> instead.
		678
		679	type: OpenCL::DEVICE_TYPE_DEFAULT, OpenCL::DEVICE_TYPE_CPU, OpenCL::DEVICE_TYPE_GPU,
		680	OpenCL::DEVICE_TYPE_ACCELERATOR, OpenCL::DEVICE_TYPE_CUSTOM, OpenCL::DEVICE_TYPE_ALL.
306		681
307	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	682	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
308		683
		684	=item $ctx = OpenCL::context $properties, \@devices, $callback->($err, $pvt) = $print_stderr)
		685
		686	Create a new OpenCL::Context object using the given device object(s).
		687	Consider using C<< $platform->context >> instead.
		688
		689	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
		690
309	=item OpenCL::wait_for_events $wait_events...	691	=item OpenCL::wait_for_events $wait_events...
310		692
311	Waits for all events to complete.	693	Waits for all events to complete.
312		694
313	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	695	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
314		696
		697	=item OpenCL::poll
		698
		699	Checks if there are any outstanding events (see L<EVENT SYSTEM>) and
		700	invokes their callbacks.
		701
		702	=item $OpenCL::INTERRUPT
		703
		704	The L<Async::Interrupt> object used to signal asynchronous events (see
		705	L<EVENT SYSTEM>).
		706
		707	=cut
		708
		709	our $INTERRUPT = new Async::Interrupt c_cb => [$POLL_FUNC, 0];
		710
		711	&_eq_initialise ($INTERRUPT->signal_func);
		712
		713	=item $OpenCL::WATCHER
		714
		715	The L<AnyEvent> watcher object used to watch for asynchronous events (see
		716	L<EVENT SYSTEM>). This variable is C<undef> until L<AnyEvent> has been
		717	loaded I<and> initialised (e.g. by calling C<AnyEvent::detect>).
		718
		719	=cut
		720
		721	our $WATCHER;
		722
		723	sub _init_anyevent {
		724	$INTERRUPT->block;
		725	$WATCHER = AE::io ($INTERRUPT->pipe_fileno, 0, sub { $INTERRUPT->handle });
		726	}
		727
		728	if (defined $AnyEvent::MODEL) {
		729	_init_anyevent;
		730	} else {
		731	push @AnyEvent::post_detect, \&_init_anyevent;
		732	}
		733
315	=back	734	=back
316		735
		736	=head2 THE OpenCL::Object CLASS
		737
		738	This is the base class for all objects in the OpenCL module. The only
		739	method it implements is the C<id> method, which is only useful if you want
		740	to interface to OpenCL on the C level.
		741
		742	=over 4
		743
		744	=item $iv = $obj->id
		745
		746	OpenCL objects are represented by pointers or integers on the C level. If
		747	you want to interface to an OpenCL object directly on the C level, then
		748	you need this value, which is returned by this method. You should use an
		749	C<IV> type in your code and cast that to the correct type.
		750
		751	=cut
		752
		753	sub OpenCL::Object::id {
		754	ref $_[0] eq "SCALAR"
		755	? ${ $_[0] }
		756	: $_[0][0]
		757	}
		758
		759	=back
		760
317	=head2 THE OpenCL::Platform CLASS	761	=head2 THE OpenCL::Platform CLASS
318		762
319	=over 4	763	=over 4
320		764
321	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)	765	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)
322		766
323	Returns a list of matching OpenCL::Device objects.	767	Returns a list of matching OpenCL::Device objects.
324		768
325	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef)	769	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr)
326		770
327	Tries to create a context. Never worked for me, and you need devices explicitly anyway.	771	Tries to create a context. Never worked for me, and you need devices explicitly anyway.
328		772
329	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	773	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
330		774
331	=item $ctx = $device->context ($properties = undef, @$devices, $notify = undef)	775	=item $ctx = $platform->context ($properties, \@devices, $callback->($err, $pvt) = $print_stderr)
332		776
333	Create a new OpenCL::Context object using the given device object(s)- a	777	Create a new OpenCL::Context object using the given device object(s)- a
334	CL_CONTEXT_PLATFORM property is supplied automatically.	778	OpenCL::CONTEXT_PLATFORM property is supplied automatically.
335		779
336	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>	780	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
337		781
338	=item $packed_value = $platform->info ($name)	782	=item $packed_value = $platform->info ($name)
339		783
…		…
344	It's best to avoid this method and use one of the following convenience	788	It's best to avoid this method and use one of the following convenience
345	wrappers.	789	wrappers.
346		790
347	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>	791	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>
348		792
		793	=item $platform->unload_compiler
		794
		795	Attempts to unload the compiler for this platform, for endless
		796	profit. Does nothing on OpenCL 1.1.
		797
		798	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clUnloadPlatformCompiler.html>
		799
349	=for gengetinfo begin platform	800	=for gengetinfo begin platform
350		801
351	=item $string = $platform->profile	802	=item $string = $platform->profile
352		803
353	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_PROFILE> and returns the result(s).	804	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_PROFILE> and returns the result.
354		805
355	=item $string = $platform->version	806	=item $string = $platform->version
356		807
357	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VERSION> and returns the result(s).	808	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_VERSION> and returns the result.
358		809
359	=item $string = $platform->name	810	=item $string = $platform->name
360		811
361	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_NAME> and returns the result(s).	812	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_NAME> and returns the result.
362		813
363	=item $string = $platform->vendor	814	=item $string = $platform->vendor
364		815
365	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VENDOR> and returns the result(s).	816	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_VENDOR> and returns the result.
366		817
367	=item $string = $platform->extensions	818	=item $string = $platform->extensions
368		819
369	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_EXTENSIONS> and returns the result(s).	820	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_EXTENSIONS> and returns the result.
370		821
371	=for gengetinfo end platform	822	=for gengetinfo end platform
372		823
373	=back	824	=back
374		825
…		…
378		829
379	=item $packed_value = $device->info ($name)	830	=item $packed_value = $device->info ($name)
380		831
381	See C<< $platform->info >> for details.	832	See C<< $platform->info >> for details.
382		833
		834	type: OpenCL::DEVICE_TYPE_DEFAULT, OpenCL::DEVICE_TYPE_CPU,
		835	OpenCL::DEVICE_TYPE_GPU, OpenCL::DEVICE_TYPE_ACCELERATOR,
		836	OpenCL::DEVICE_TYPE_CUSTOM, OpenCL::DEVICE_TYPE_ALL.
		837
		838	fp_config: OpenCL::FP_DENORM, OpenCL::FP_INF_NAN, OpenCL::FP_ROUND_TO_NEAREST,
		839	OpenCL::FP_ROUND_TO_ZERO, OpenCL::FP_ROUND_TO_INF, OpenCL::FP_FMA,
		840	OpenCL::FP_SOFT_FLOAT, OpenCL::FP_CORRECTLY_ROUNDED_DIVIDE_SQRT.
		841
		842	mem_cache_type: OpenCL::NONE, OpenCL::READ_ONLY_CACHE, OpenCL::READ_WRITE_CACHE.
		843
		844	local_mem_type: OpenCL::LOCAL, OpenCL::GLOBAL.
		845
		846	exec_capabilities: OpenCL::EXEC_KERNEL, OpenCL::EXEC_NATIVE_KERNEL.
		847
		848	command_queue_properties: OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE,
		849	OpenCL::QUEUE_PROFILING_ENABLE.
		850
		851	partition_properties: OpenCL::DEVICE_PARTITION_EQUALLY,
		852	OpenCL::DEVICE_PARTITION_BY_COUNTS, OpenCL::DEVICE_PARTITION_BY_COUNTS_LIST_END,
		853	OpenCL::DEVICE_PARTITION_BY_AFFINITY_DOMAIN.
		854
		855	affinity_domain: OpenCL::DEVICE_AFFINITY_DOMAIN_NUMA,
		856	OpenCL::DEVICE_AFFINITY_DOMAIN_L4_CACHE, OpenCL::DEVICE_AFFINITY_DOMAIN_L3_CACHE,
		857	OpenCL::DEVICE_AFFINITY_DOMAIN_L2_CACHE, OpenCL::DEVICE_AFFINITY_DOMAIN_L1_CACHE,
		858	OpenCL::DEVICE_AFFINITY_DOMAIN_NEXT_PARTITIONABLE.
		859
383	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>	860	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>
384		861
		862	=item @devices = $device->sub_devices (\@properties)
		863
		864	Creates OpencL::SubDevice objects by partitioning an existing device.
		865
		866	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateSubDevices.html>
		867
385	=for gengetinfo begin device	868	=for gengetinfo begin device
386		869
387	=item $device_type = $device->type	870	=item $device_type = $device->type
388		871
389	Calls C<clGetDeviceInfo> with C<CL_DEVICE_TYPE> and returns the result(s).	872	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_TYPE> and returns the result.
390		873
391	=item $uint = $device->vendor_id	874	=item $uint = $device->vendor_id
392		875
393	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR_ID> and returns the result(s).	876	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VENDOR_ID> and returns the result.
394		877
395	=item $uint = $device->max_compute_units	878	=item $uint = $device->max_compute_units
396		879
397	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_COMPUTE_UNITS> and returns the result(s).	880	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_COMPUTE_UNITS> and returns the result.
398		881
399	=item $uint = $device->max_work_item_dimensions	882	=item $uint = $device->max_work_item_dimensions
400		883
401	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result(s).	884	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result.
402		885
403	=item $int = $device->max_work_group_size	886	=item $int = $device->max_work_group_size
404		887
405	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_GROUP_SIZE> and returns the result(s).	888	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_GROUP_SIZE> and returns the result.
406		889
407	=item @ints = $device->max_work_item_sizes	890	=item @ints = $device->max_work_item_sizes
408		891
409	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_SIZES> and returns the result(s).	892	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_ITEM_SIZES> and returns the result.
410		893
411	=item $uint = $device->preferred_vector_width_char	894	=item $uint = $device->preferred_vector_width_char
412		895
413	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result(s).	896	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result.
414		897
415	=item $uint = $device->preferred_vector_width_short	898	=item $uint = $device->preferred_vector_width_short
416		899
417	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result(s).	900	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result.
418		901
419	=item $uint = $device->preferred_vector_width_int	902	=item $uint = $device->preferred_vector_width_int
420		903
421	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result(s).	904	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result.
422		905
423	=item $uint = $device->preferred_vector_width_long	906	=item $uint = $device->preferred_vector_width_long
424		907
425	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result(s).	908	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result.
426		909
427	=item $uint = $device->preferred_vector_width_float	910	=item $uint = $device->preferred_vector_width_float
428		911
429	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result(s).	912	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result.
430		913
431	=item $uint = $device->preferred_vector_width_double	914	=item $uint = $device->preferred_vector_width_double
432		915
433	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result(s).	916	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result.
434		917
435	=item $uint = $device->max_clock_frequency	918	=item $uint = $device->max_clock_frequency
436		919
437	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CLOCK_FREQUENCY> and returns the result(s).	920	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CLOCK_FREQUENCY> and returns the result.
438		921
439	=item $bitfield = $device->address_bits	922	=item $bitfield = $device->address_bits
440		923
441	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ADDRESS_BITS> and returns the result(s).	924	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ADDRESS_BITS> and returns the result.
442		925
443	=item $uint = $device->max_read_image_args	926	=item $uint = $device->max_read_image_args
444		927
445	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_READ_IMAGE_ARGS> and returns the result(s).	928	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_READ_IMAGE_ARGS> and returns the result.
446		929
447	=item $uint = $device->max_write_image_args	930	=item $uint = $device->max_write_image_args
448		931
449	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result(s).	932	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result.
450		933
451	=item $ulong = $device->max_mem_alloc_size	934	=item $ulong = $device->max_mem_alloc_size
452		935
453	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result(s).	936	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result.
454		937
455	=item $int = $device->image2d_max_width	938	=item $int = $device->image2d_max_width
456		939
457	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_WIDTH> and returns the result(s).	940	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE2D_MAX_WIDTH> and returns the result.
458		941
459	=item $int = $device->image2d_max_height	942	=item $int = $device->image2d_max_height
460		943
461	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result(s).	944	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result.
462		945
463	=item $int = $device->image3d_max_width	946	=item $int = $device->image3d_max_width
464		947
465	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_WIDTH> and returns the result(s).	948	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_WIDTH> and returns the result.
466		949
467	=item $int = $device->image3d_max_height	950	=item $int = $device->image3d_max_height
468		951
469	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result(s).	952	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result.
470		953
471	=item $int = $device->image3d_max_depth	954	=item $int = $device->image3d_max_depth
472		955
473	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_DEPTH> and returns the result(s).	956	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_DEPTH> and returns the result.
474		957
475	=item $uint = $device->image_support	958	=item $uint = $device->image_support
476		959
477	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE_SUPPORT> and returns the result(s).	960	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE_SUPPORT> and returns the result.
478		961
479	=item $int = $device->max_parameter_size	962	=item $int = $device->max_parameter_size
480		963
481	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_PARAMETER_SIZE> and returns the result(s).	964	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_PARAMETER_SIZE> and returns the result.
482		965
483	=item $uint = $device->max_samplers	966	=item $uint = $device->max_samplers
484		967
485	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_SAMPLERS> and returns the result(s).	968	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_SAMPLERS> and returns the result.
486		969
487	=item $uint = $device->mem_base_addr_align	970	=item $uint = $device->mem_base_addr_align
488		971
489	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result(s).	972	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result.
490		973
491	=item $uint = $device->min_data_type_align_size	974	=item $uint = $device->min_data_type_align_size
492		975
493	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result(s).	976	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result.
494		977
495	=item $device_fp_config = $device->single_fp_config	978	=item $device_fp_config = $device->single_fp_config
496		979
497	Calls C<clGetDeviceInfo> with C<CL_DEVICE_SINGLE_FP_CONFIG> and returns the result(s).	980	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_SINGLE_FP_CONFIG> and returns the result.
498		981
499	=item $device_mem_cache_type = $device->global_mem_cache_type	982	=item $device_mem_cache_type = $device->global_mem_cache_type
500		983
501	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result(s).	984	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result.
502		985
503	=item $uint = $device->global_mem_cacheline_size	986	=item $uint = $device->global_mem_cacheline_size
504		987
505	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result(s).	988	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result.
506		989
507	=item $ulong = $device->global_mem_cache_size	990	=item $ulong = $device->global_mem_cache_size
508		991
509	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result(s).	992	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result.
510		993
511	=item $ulong = $device->global_mem_size	994	=item $ulong = $device->global_mem_size
512		995
513	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_SIZE> and returns the result(s).	996	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_SIZE> and returns the result.
514		997
515	=item $ulong = $device->max_constant_buffer_size	998	=item $ulong = $device->max_constant_buffer_size
516		999
517	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result(s).	1000	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result.
518		1001
519	=item $uint = $device->max_constant_args	1002	=item $uint = $device->max_constant_args
520		1003
521	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_ARGS> and returns the result(s).	1004	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CONSTANT_ARGS> and returns the result.
522		1005
523	=item $device_local_mem_type = $device->local_mem_type	1006	=item $device_local_mem_type = $device->local_mem_type
524		1007
525	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_TYPE> and returns the result(s).	1008	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_LOCAL_MEM_TYPE> and returns the result.
526		1009
527	=item $ulong = $device->local_mem_size	1010	=item $ulong = $device->local_mem_size
528		1011
529	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_SIZE> and returns the result(s).	1012	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_LOCAL_MEM_SIZE> and returns the result.
530		1013
531	=item $boolean = $device->error_correction_support	1014	=item $boolean = $device->error_correction_support
532		1015
533	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result(s).	1016	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result.
534		1017
535	=item $int = $device->profiling_timer_resolution	1018	=item $int = $device->profiling_timer_resolution
536		1019
537	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result(s).	1020	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result.
538		1021
539	=item $boolean = $device->endian_little	1022	=item $boolean = $device->endian_little
540		1023
541	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ENDIAN_LITTLE> and returns the result(s).	1024	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ENDIAN_LITTLE> and returns the result.
542		1025
543	=item $boolean = $device->available	1026	=item $boolean = $device->available
544		1027
545	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AVAILABLE> and returns the result(s).	1028	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_AVAILABLE> and returns the result.
546		1029
547	=item $boolean = $device->compiler_available	1030	=item $boolean = $device->compiler_available
548		1031
549	Calls C<clGetDeviceInfo> with C<CL_DEVICE_COMPILER_AVAILABLE> and returns the result(s).	1032	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_COMPILER_AVAILABLE> and returns the result.
550		1033
551	=item $device_exec_capabilities = $device->execution_capabilities	1034	=item $device_exec_capabilities = $device->execution_capabilities
552		1035
553	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXECUTION_CAPABILITIES> and returns the result(s).	1036	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_EXECUTION_CAPABILITIES> and returns the result.
554		1037
555	=item $command_queue_properties = $device->properties	1038	=item $command_queue_properties = $device->properties
556		1039
557	Calls C<clGetDeviceInfo> with C<CL_DEVICE_QUEUE_PROPERTIES> and returns the result(s).	1040	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_QUEUE_PROPERTIES> and returns the result.
558		1041
559	=item $ = $device->platform	1042	=item $ = $device->platform
560		1043
561	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PLATFORM> and returns the result(s).	1044	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PLATFORM> and returns the result.
562		1045
563	=item $string = $device->name	1046	=item $string = $device->name
564		1047
565	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NAME> and returns the result(s).	1048	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NAME> and returns the result.
566		1049
567	=item $string = $device->vendor	1050	=item $string = $device->vendor
568		1051
569	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR> and returns the result(s).	1052	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VENDOR> and returns the result.
570		1053
571	=item $string = $device->driver_version	1054	=item $string = $device->driver_version
572		1055
573	Calls C<clGetDeviceInfo> with C<CL_DRIVER_VERSION> and returns the result(s).	1056	Calls C<clGetDeviceInfo> with C<OpenCL::DRIVER_VERSION> and returns the result.
574		1057
575	=item $string = $device->profile	1058	=item $string = $device->profile
576		1059
577	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILE> and returns the result(s).	1060	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PROFILE> and returns the result.
578		1061
579	=item $string = $device->version	1062	=item $string = $device->version
580		1063
581	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VERSION> and returns the result(s).	1064	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VERSION> and returns the result.
582		1065
583	=item $string = $device->extensions	1066	=item $string = $device->extensions
584		1067
585	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXTENSIONS> and returns the result(s).	1068	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_EXTENSIONS> and returns the result.
586		1069
587	=item $uint = $device->preferred_vector_width_half	1070	=item $uint = $device->preferred_vector_width_half
588		1071
589	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result(s).	1072	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result.
590		1073
591	=item $uint = $device->native_vector_width_char	1074	=item $uint = $device->native_vector_width_char
592		1075
593	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result(s).	1076	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result.
594		1077
595	=item $uint = $device->native_vector_width_short	1078	=item $uint = $device->native_vector_width_short
596		1079
597	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result(s).	1080	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result.
598		1081
599	=item $uint = $device->native_vector_width_int	1082	=item $uint = $device->native_vector_width_int
600		1083
601	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result(s).	1084	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result.
602		1085
603	=item $uint = $device->native_vector_width_long	1086	=item $uint = $device->native_vector_width_long
604		1087
605	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result(s).	1088	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result.
606		1089
607	=item $uint = $device->native_vector_width_float	1090	=item $uint = $device->native_vector_width_float
608		1091
609	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result(s).	1092	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result.
610		1093
611	=item $uint = $device->native_vector_width_double	1094	=item $uint = $device->native_vector_width_double
612		1095
613	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result(s).	1096	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result.
614		1097
615	=item $uint = $device->native_vector_width_half	1098	=item $uint = $device->native_vector_width_half
616		1099
617	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result(s).	1100	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result.
618		1101
619	=item $device_fp_config = $device->double_fp_config	1102	=item $device_fp_config = $device->double_fp_config
620		1103
621	Calls C<clGetDeviceInfo> with C<CL_DEVICE_DOUBLE_FP_CONFIG> and returns the result(s).	1104	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_DOUBLE_FP_CONFIG> and returns the result.
622		1105
623	=item $device_fp_config = $device->half_fp_config	1106	=item $device_fp_config = $device->half_fp_config
624		1107
625	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HALF_FP_CONFIG> and returns the result(s).	1108	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_HALF_FP_CONFIG> and returns the result.
626		1109
627	=item $boolean = $device->host_unified_memory	1110	=item $boolean = $device->host_unified_memory
628		1111
629	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HOST_UNIFIED_MEMORY> and returns the result(s).	1112	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_HOST_UNIFIED_MEMORY> and returns the result.
630		1113
631	=item $device = $device->parent_device_ext	1114	=item $device = $device->parent_device_ext
632		1115
633	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARENT_DEVICE_EXT> and returns the result(s).	1116	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARENT_DEVICE_EXT> and returns the result.
634		1117
635	=item @device_partition_property_exts = $device->partition_types_ext	1118	=item @device_partition_property_exts = $device->partition_types_ext
636		1119
637	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_TYPES_EXT> and returns the result(s).	1120	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARTITION_TYPES_EXT> and returns the result.
638		1121
639	=item @device_partition_property_exts = $device->affinity_domains_ext	1122	=item @device_partition_property_exts = $device->affinity_domains_ext
640		1123
641	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AFFINITY_DOMAINS_EXT> and returns the result(s).	1124	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_AFFINITY_DOMAINS_EXT> and returns the result.
642		1125
643	=item $uint = $device->reference_count_ext	1126	=item $uint = $device->reference_count_ext
644		1127
645	Calls C<clGetDeviceInfo> with C<CL_DEVICE_REFERENCE_COUNT_EXT > and returns the result(s).	1128	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_REFERENCE_COUNT_EXT> and returns the result.
646		1129
647	=item @device_partition_property_exts = $device->partition_style_ext	1130	=item @device_partition_property_exts = $device->partition_style_ext
648		1131
649	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_STYLE_EXT> and returns the result(s).	1132	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARTITION_STYLE_EXT> and returns the result.
650		1133
651	=for gengetinfo end device	1134	=for gengetinfo end device
652		1135
653	=back	1136	=back
654		1137
655	=head2 THE OpenCL::Context CLASS	1138	=head2 THE OpenCL::Context CLASS
656		1139
		1140	An OpenCL::Context is basically a container, or manager, for a number of
		1141	devices of a platform. It is used to create all sorts of secondary objects
		1142	such as buffers, queues, programs and so on.
		1143
		1144	All context creation functions and methods take a list of properties
		1145	(type-value pairs). All property values can be specified as integers -
		1146	some additionally support other types:
		1147
657	=over 4	1148	=over 4
658		1149
		1150	=item OpenCL::CONTEXT_PLATFORM
		1151
		1152	Also accepts OpenCL::Platform objects.
		1153
		1154	=item OpenCL::GLX_DISPLAY_KHR
		1155
		1156	Also accepts C<undef>, in which case a deep and troubling hack is engaged
		1157	to find the current glx display (see L<GLX SUPPORT>).
		1158
		1159	=item OpenCL::GL_CONTEXT_KHR
		1160
		1161	Also accepts C<undef>, in which case a deep and troubling hack is engaged
		1162	to find the current glx context (see L<GLX SUPPORT>).
		1163
		1164	=back
		1165
		1166	=over 4
		1167
		1168	=item $prog = $ctx->build_program ($program, $options = "")
		1169
		1170	This convenience function tries to build the program on all devices in
		1171	the context. If the build fails, then the function will C<croak> with the
		1172	build log. Otherwise ti returns the program object.
		1173
		1174	The C<$program> can either be a C<OpenCL::Program> object or a string
		1175	containing the program. In the latter case, a program objetc will be
		1176	created automatically.
		1177
		1178	=cut
		1179
		1180	sub OpenCL::Context::build_program {
		1181	my ($self, $prog, $options) = @_;
		1182
		1183	$prog = $self->program_with_source ($prog)
		1184	unless ref $prog;
		1185
		1186	eval { $prog->build (undef, $options); 1 }
		1187	or errno == BUILD_PROGRAM_FAILURE
		1188	or errno == INVALID_BINARY # workaround nvidia bug
		1189	or Carp::croak "OpenCL::Context->build_program: " . err2str;
		1190
		1191	# we check status for all devices
		1192	for my $dev ($self->devices) {
		1193	$prog->build_status ($dev) == BUILD_SUCCESS
		1194	or Carp::croak "Building OpenCL program for device '" . $dev->name . "' failed:\n"
		1195	. $prog->build_log ($dev);
		1196	}
		1197
		1198	$prog
		1199	}
		1200
659	=item $queue = $ctx->queue ($device, $properties)	1201	=item $queue = $ctx->queue ($device, $properties)
660		1202
661	Create a new OpenCL::Queue object from the context and the given device.	1203	Create a new OpenCL::Queue object from the context and the given device.
662		1204
663	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>	1205	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>
664		1206
		1207	Example: create an out-of-order queue.
		1208
		1209	$queue = $ctx->queue ($device, OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE);
		1210
665	=item $ev = $ctx->user_event	1211	=item $ev = $ctx->user_event
666		1212
667	Creates a new OpenCL::UserEvent object.	1213	Creates a new OpenCL::UserEvent object.
668		1214
669	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>	1215	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>
670		1216
671	=item $buf = $ctx->buffer ($flags, $len)	1217	=item $buf = $ctx->buffer ($flags, $len)
672		1218
673	Creates a new OpenCL::Buffer object with the given flags and octet-size.	1219	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object with the
		1220	given flags and octet-size.
		1221
		1222	flags: OpenCL::MEM_READ_WRITE, OpenCL::MEM_WRITE_ONLY, OpenCL::MEM_READ_ONLY,
		1223	OpenCL::MEM_USE_HOST_PTR, OpenCL::MEM_ALLOC_HOST_PTR, OpenCL::MEM_COPY_HOST_PTR,
		1224	OpenCL::MEM_HOST_WRITE_ONLY, OpenCL::MEM_HOST_READ_ONLY, OpenCL::MEM_HOST_NO_ACCESS.
674		1225
675	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>	1226	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>
676		1227
		1228	A somewhat informative thread on the flags is:
		1229
		1230	L<http://www.khronos.org/message_boards/viewtopic.php?f=28&t=2440>
		1231
677	=item $buf = $ctx->buffer_sv ($flags, $data)	1232	=item $buf = $ctx->buffer_sv ($flags, $data)
678		1233
679	Creates a new OpenCL::Buffer object and initialise it with the given data values.	1234	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object and
		1235	initialise it with the given data values.
		1236
		1237	=item $img = $ctx->image ($self, $flags, $channel_order, $channel_type, $type, $width, $height, $depth = 0, $array_size = 0, $row_pitch = 0, $slice_pitch = 0, $num_mip_level = 0, $num_samples = 0, $*data = &PL_sv_undef)
		1238
		1239	Creates a new OpenCL::Image object and optionally initialises it with
		1240	the given data values.
		1241
		1242	channel_order: OpenCL::R, OpenCL::A, OpenCL::RG, OpenCL::RA, OpenCL::RGB,
		1243	OpenCL::RGBA, OpenCL::BGRA, OpenCL::ARGB, OpenCL::INTENSITY, OpenCL::LUMINANCE,
		1244	OpenCL::Rx, OpenCL::RGx, OpenCL::RGBx.
		1245
		1246	channel_type: OpenCL::SNORM_INT8, OpenCL::SNORM_INT16, OpenCL::UNORM_INT8,
		1247	OpenCL::UNORM_INT16, OpenCL::UNORM_SHORT_565, OpenCL::UNORM_SHORT_555,
		1248	OpenCL::UNORM_INT_101010, OpenCL::SIGNED_INT8, OpenCL::SIGNED_INT16,
		1249	OpenCL::SIGNED_INT32, OpenCL::UNSIGNED_INT8, OpenCL::UNSIGNED_INT16,
		1250	OpenCL::UNSIGNED_INT32, OpenCL::HALF_FLOAT, OpenCL::FLOAT.
		1251
		1252	type: OpenCL::MEM_OBJECT_BUFFER, OpenCL::MEM_OBJECT_IMAGE2D,
		1253	OpenCL::MEM_OBJECT_IMAGE3D, OpenCL::MEM_OBJECT_IMAGE2D_ARRAY,
		1254	OpenCL::MEM_OBJECT_IMAGE1D, OpenCL::MEM_OBJECT_IMAGE1D_ARRAY,
		1255	OpenCL::MEM_OBJECT_IMAGE1D_BUFFER.
		1256
		1257	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateImage.html>
680		1258
681	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)	1259	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)
682		1260
683	Creates a new OpenCL::Image2D object and optionally initialises it with the given data values.	1261	Creates a new OpenCL::Image2D object and optionally initialises it with
		1262	the given data values.
684		1263
685	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>	1264	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>
686		1265
687	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)	1266	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)
688		1267
689	Creates a new OpenCL::Image3D object and optionally initialises it with the given data values.	1268	Creates a new OpenCL::Image3D object and optionally initialises it with
		1269	the given data values.
690		1270
691	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>	1271	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>
		1272
		1273	=item $buffer = $ctx->gl_buffer ($flags, $bufobj)
		1274
		1275	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object that refers to the given
		1276	OpenGL buffer object.
		1277
		1278	flags: OpenCL::MEM_READ_WRITE, OpenCL::MEM_READ_ONLY, OpenCL::MEM_WRITE_ONLY.
		1279
		1280	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLBuffer.html
		1281
		1282	=item $img = $ctx->gl_texture ($flags, $target, $miplevel, $texture)
		1283
		1284	Creates a new OpenCL::Image object that refers to the given OpenGL
		1285	texture object or buffer.
		1286
		1287	target: GL_TEXTURE_1D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_BUFFER,
		1288	GL_TEXTURE_2D, GL_TEXTURE_2D_ARRAY, GL_TEXTURE_3D,
		1289	GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
		1290	GL_TEXTURE_CUBE_MAP_POSITIVE_Z, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
		1291	GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
		1292	GL_TEXTURE_RECTANGLE/GL_TEXTURE_RECTANGLE_ARB.
		1293
		1294	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateFromGLTexture.html
		1295
		1296	=item $img = $ctx->gl_texture2d ($flags, $target, $miplevel, $texture)
		1297
		1298	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1299	2D texture object.
		1300
		1301	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture2D.html
		1302
		1303	=item $img = $ctx->gl_texture3d ($flags, $target, $miplevel, $texture)
		1304
		1305	Creates a new OpenCL::Image3D object that refers to the given OpenGL
		1306	3D texture object.
		1307
		1308	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture3D.html
		1309
		1310	=item $ctx->gl_renderbuffer ($flags, $renderbuffer)
		1311
		1312	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1313	render buffer.
		1314
		1315	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLRenderbuffer.html
692		1316
693	=item @formats = $ctx->supported_image_formats ($flags, $image_type)	1317	=item @formats = $ctx->supported_image_formats ($flags, $image_type)
694		1318
695	Returns a list of matching image formats - each format is an arrayref with	1319	Returns a list of matching image formats - each format is an arrayref with
696	two values, $channel_order and $channel_type, in it.	1320	two values, $channel_order and $channel_type, in it.
…		…
699		1323
700	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)	1324	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)
701		1325
702	Creates a new OpenCL::Sampler object.	1326	Creates a new OpenCL::Sampler object.
703		1327
		1328	addressing_mode: OpenCL::ADDRESS_NONE, OpenCL::ADDRESS_CLAMP_TO_EDGE,
		1329	OpenCL::ADDRESS_CLAMP, OpenCL::ADDRESS_REPEAT, OpenCL::ADDRESS_MIRRORED_REPEAT.
		1330
		1331	filter_mode: OpenCL::FILTER_NEAREST, OpenCL::FILTER_LINEAR.
		1332
704	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>	1333	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>
705		1334
706	=item $program = $ctx->program_with_source ($string)	1335	=item $program = $ctx->program_with_source ($string)
707		1336
708	Creates a new OpenCL::Program object from the given source code.	1337	Creates a new OpenCL::Program object from the given source code.
709		1338
710	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>	1339	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>
711		1340
		1341	=item ($program, \@status) = $ctx->program_with_binary (\@devices, \@binaries)
		1342
		1343	Creates a new OpenCL::Program object from the given binaries.
		1344
		1345	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithBinary.html>
		1346
		1347	Example: clone an existing program object that contains a successfully
		1348	compiled program, no matter how useless this is.
		1349
		1350	my $clone = $ctx->program_with_binary ([$prog->devices], [$prog->binaries]);
		1351
		1352	=item $program = $ctx->program_with_built_in_kernels (\@devices, $kernel_names)
		1353
		1354	Creates a new OpenCL::Program object from the given built-in kernel names.
		1355
		1356	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateProgramWithBuiltInKernels.html>
		1357
		1358	=item $program = $ctx->link_program (\@devices, $options, \@programs, $cb->($program) = undef)
		1359
		1360	Links all (already compiled) program objects specified in C<@programs>
		1361	together and returns a new OpenCL::Program object with the result.
		1362
		1363	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clLinkProgram.html>
		1364
712	=item $packed_value = $ctx->info ($name)	1365	=item $packed_value = $ctx->info ($name)
713		1366
714	See C<< $platform->info >> for details.	1367	See C<< $platform->info >> for details.
715		1368
716	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>	1369	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>
717		1370
718	=for gengetinfo begin context	1371	=for gengetinfo begin context
719		1372
720	=item $uint = $context->reference_count	1373	=item $uint = $context->reference_count
721		1374
722	Calls C<clGetContextInfo> with C<CL_CONTEXT_REFERENCE_COUNT> and returns the result(s).	1375	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_REFERENCE_COUNT> and returns the result.
723		1376
724	=item @devices = $context->devices	1377	=item @devices = $context->devices
725		1378
726	Calls C<clGetContextInfo> with C<CL_CONTEXT_DEVICES> and returns the result(s).	1379	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_DEVICES> and returns the result.
727		1380
728	=item @property_ints = $context->properties	1381	=item @property_ints = $context->properties
729		1382
730	Calls C<clGetContextInfo> with C<CL_CONTEXT_PROPERTIES> and returns the result(s).	1383	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_PROPERTIES> and returns the result.
731		1384
732	=item $uint = $context->num_devices	1385	=item $uint = $context->num_devices
733		1386
734	Calls C<clGetContextInfo> with C<CL_CONTEXT_NUM_DEVICES> and returns the result(s).	1387	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_NUM_DEVICES> and returns the result.
735		1388
736	=for gengetinfo end context	1389	=for gengetinfo end context
737		1390
738	=back	1391	=back
739		1392
740	=head2 THE OpenCL::Queue CLASS	1393	=head2 THE OpenCL::Queue CLASS
741		1394
742	An OpenCL::Queue represents an execution queue for OpenCL. You execute	1395	An OpenCL::Queue represents an execution queue for OpenCL. You execute
743	requests by calling their respective C<enqueue_xxx> method and waitinf for	1396	requests by calling their respective method and waiting for it to complete
744	it to complete in some way.	1397	in some way.
745		1398
746	All the enqueue methods return an event object that can be used to wait	1399	Most methods that enqueue some request return an event object that can
747	for completion, unless the method is called in void context, in which case	1400	be used to wait for completion (optionally using a callback), unless
748	no event object is created.	1401	the method is called in void context, in which case no event object is
		1402	created.
749		1403
750	They also allow you to specify any number of other event objects that this	1404	They also allow you to specify any number of other event objects that this
751	request has to wait for before it starts executing, by simply passing the	1405	request has to wait for before it starts executing, by simply passing the
752	event objects as extra parameters to the enqueue methods.	1406	event objects as extra parameters to the enqueue methods. To simplify
		1407	program design, this module ignores any C<undef> values in the list of
		1408	events. This makes it possible to code operations such as this, without
		1409	having to put a valid event object into C<$event> first:
		1410
		1411	$event = $queue->xxx (..., $event);
753		1412
754	Queues execute in-order by default, without any parallelism, so in most	1413	Queues execute in-order by default, without any parallelism, so in most
755	cases (i.e. you use only one queue) it's not necessary to wait for or	1414	cases (i.e. you use only one queue) it's not necessary to wait for or
756	create event objects.	1415	create event objects, althoguh an our of order queue is often a bit
		1416	faster.
757		1417
758	=over 4	1418	=over 4
759		1419
760	=item $ev = $queue->enqueue_read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)	1420	=item $ev = $queue->read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)
761		1421
762	Reads data from buffer into the given string.	1422	Reads data from buffer into the given string.
763		1423
764	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>	1424	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>
765		1425
766	=item $ev = $queue->enqueue_write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)	1426	=item $ev = $queue->write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)
767		1427
768	Writes data to buffer from the given string.	1428	Writes data to buffer from the given string.
769		1429
770	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>	1430	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>
771		1431
772	=item $ev = $queue->enqueue_copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)	1432	=item $ev = $queue->copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)
773		1433
774	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>	1434	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>
775		1435
		1436	$eue->read_buffer_rect ($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...)
		1437
		1438	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBufferRect.html
		1439
		1440	=item $ev = $queue->write_buffer_rect ($buf, $blocking, $buf_y, $host_x, $host_z, $height, $buf_row_pitch, $host_row_pitch, $data, $wait_events...)
		1441
		1442	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBufferRect.html
		1443
		1444	=item $ev = $queue->copy_buffer_to_image ($src_buffer, $dst_image, $src_offset, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		1445
		1446	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>
		1447
776	=item $ev = $queue->enqueue_read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)	1448	=item $ev = $queue->read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
		1449
		1450	C<$row_pitch> (and C<$slice_pitch>) can be C<0>, in which case the OpenCL
		1451	module uses the image width (and height) to supply default values.
777		1452
778	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>	1453	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>
779		1454
780	=item $ev = $queue->enqueue_write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)	1455	=item $ev = $queue->write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
781		1456
		1457	C<$row_pitch> (and C<$slice_pitch>) can be C<0>, in which case the OpenCL
		1458	module uses the image width (and height) to supply default values.
782	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>	1459	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>
783		1460
		1461	=item $ev = $queue->copy_image ($src_image, $dst_image, $src_x, $src_y, $src_z, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		1462
		1463	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>
		1464
		1465	=item $ev = $queue->copy_image_to_buffer ($src_image, $dst_image, $src_x, $src_y, $src_z, $width, $height, $depth, $dst_offset, $wait_events...)
		1466
		1467	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
		1468
784	=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...)	1469	=item $ev = $queue->copy_buffer_rect ($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...)
785		1470
786	Yeah.	1471	Yeah.
787		1472
788	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
789
790	=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...)
791
792	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.	1473	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.
793		1474
794	=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...)	1475	=item $ev = $queue->fill_buffer ($mem, $pattern, $offset, $size, ...)
795		1476
		1477	Fills the given buffer object with repeated applications of C<$pattern>,
		1478	starting at C<$offset> for C<$size> octets.
		1479
		1480	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillBuffer.html>
		1481
		1482	=item $ev = $queue->fill_image ($img, $r, $g, $b, $a, $x, $y, $z, $width, $height, $depth, ...)
		1483
		1484	Fills the given image area with the given rgba colour components. The
		1485	components are normally floating point values between C<0> and C<1>,
		1486	except when the image channel data type is a signe dor unsigned
		1487	unnormalised format, in which case the range is determined by the format.
		1488
796	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>	1489	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillImage.html>
797		1490
798	=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...)
799
800	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
801
802	=item $ev = $queue->enqueue_task ($kernel, $wait_events...)	1491	=item $ev = $queue->task ($kernel, $wait_events...)
803		1492
804	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>	1493	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>
805		1494
806	=item $ev = $queue->enqueue_nd_range_kernel ($kernel, @$global_work_offset, @$global_work_size, @$local_work_size, $wait_events...)	1495	=item $ev = $queue->nd_range_kernel ($kernel, \@global_work_offset, \@global_work_size, \@local_work_size, $wait_events...)
807		1496
808	Enqueues a kernel execution.	1497	Enqueues a kernel execution.
809		1498
810	@$global_work_size must be specified as a reference to an array of	1499	\@global_work_size must be specified as a reference to an array of
811	integers specifying the work sizes (element counts).	1500	integers specifying the work sizes (element counts).
812		1501
813	@$global_work_offset must be either C<undef> (in which case all offsets	1502	\@global_work_offset must be either C<undef> (in which case all offsets
814	are C<0>), or a reference to an array of work offsets, with the same number	1503	are C<0>), or a reference to an array of work offsets, with the same number
815	of elements as @$global_work_size.	1504	of elements as \@global_work_size.
816		1505
817	@$local_work_size must be either C<undef> (in which case the	1506	\@local_work_size must be either C<undef> (in which case the
818	implementation is supposed to choose good local work sizes), or a	1507	implementation is supposed to choose good local work sizes), or a
819	reference to an array of local work sizes, with the same number of	1508	reference to an array of local work sizes, with the same number of
820	elements as @$global_work_size.	1509	elements as \@global_work_size.
821		1510
822	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>	1511	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>
823		1512
824	=item $ev = $queue->enqueue_marker	1513	=item $ev = $queue->migrate_mem_objects (\@mem_objects, $flags, $wait_events...)
825		1514
		1515	Migrates a number of OpenCL::Memory objects to or from the device.
		1516
		1517	flags: OpenCL::MIGRATE_MEM_OBJECT_HOST, OpenCL::MIGRATE_MEM_OBJECT_CONTENT_UNDEFINED
		1518
		1519	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMigrateMemObjects.html>
		1520
		1521	=item $ev = $queue->acquire_gl_objects ([object, ...], $wait_events...)
		1522
		1523	Enqueues a list (an array-ref of OpenCL::Memory objects) to be acquired
		1524	for subsequent OpenCL usage.
		1525
826	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html>	1526	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueAcquireGLObjects.html>
827		1527
		1528	=item $ev = $queue->release_gl_objects ([object, ...], $wait_events...)
		1529
		1530	Enqueues a list (an array-ref of OpenCL::Memory objects) to be released
		1531	for subsequent OpenGL usage.
		1532
		1533	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReleaseGLObjects.html>
		1534
828	=item $ev = $queue->enqueue_wait_for_events ($wait_events...)	1535	=item $ev = $queue->wait_for_events ($wait_events...)
829		1536
830	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>	1537	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>
831		1538
832	=item $queue->enqueue_barrier	1539	=item $ev = $queue->marker ($wait_events...)
833		1540
		1541	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMarkerWithWaitList.html>
		1542
		1543	=item $ev = $queue->barrier ($wait_events...)
		1544
834	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueBarrier.html>	1545	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueBarrierWithWaitList.html>
835		1546
836	=item $queue->flush	1547	=item $queue->flush
837		1548
838	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>	1549	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>
839		1550
…		…
849		1560
850	=for gengetinfo begin command_queue	1561	=for gengetinfo begin command_queue
851		1562
852	=item $ctx = $command_queue->context	1563	=item $ctx = $command_queue->context
853		1564
854	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_CONTEXT> and returns the result(s).	1565	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_CONTEXT> and returns the result.
855		1566
856	=item $device = $command_queue->device	1567	=item $device = $command_queue->device
857		1568
858	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_DEVICE> and returns the result(s).	1569	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_DEVICE> and returns the result.
859		1570
860	=item $uint = $command_queue->reference_count	1571	=item $uint = $command_queue->reference_count
861		1572
862	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_REFERENCE_COUNT> and returns the result(s).	1573	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_REFERENCE_COUNT> and returns the result.
863		1574
864	=item $command_queue_properties = $command_queue->properties	1575	=item $command_queue_properties = $command_queue->properties
865		1576
866	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_PROPERTIES> and returns the result(s).	1577	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_PROPERTIES> and returns the result.
867		1578
868	=for gengetinfo end command_queue	1579	=for gengetinfo end command_queue
		1580
		1581	=back
		1582
		1583	=head3 MEMORY MAPPED BUFFERS
		1584
		1585	OpenCL allows you to map buffers and images to host memory (read: perl
		1586	scalars). This is done much like reading or copying a buffer, by enqueuing
		1587	a map or unmap operation on the command queue.
		1588
		1589	The map operations return an C<OpenCL::Mapped> object - see L<THE
		1590	OpenCL::Mapped CLASS> section for details on what to do with these
		1591	objects.
		1592
		1593	The object will be unmapped automatically when the mapped object is
		1594	destroyed (you can use a barrier to make sure the unmap has finished,
		1595	before using the buffer in a kernel), but you can also enqueue an unmap
		1596	operation manually.
		1597
		1598	=over 4
		1599
		1600	=item $mapped_buffer = $queue->map_buffer ($buf, $blocking=1, $map_flags=OpenCL::MAP_READ|OpenCL::MAP_WRITE, $offset=0, $size=undef, $wait_events...)
		1601
		1602	Maps the given buffer into host memory and returns an
		1603	C<OpenCL::MappedBuffer> object. If C<$size> is specified as undef, then
		1604	the map will extend to the end of the buffer.
		1605
		1606	map_flags: OpenCL::MAP_READ, OpenCL::MAP_WRITE, OpenCL::MAP_WRITE_INVALIDATE_REGION.
		1607
		1608	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapBuffer.html>
		1609
		1610	Example: map the buffer $buf fully and replace the first 4 bytes by "abcd", then unmap.
		1611
		1612	{
		1613	my $mapped = $queue->map_buffer ($buf, 1, OpenCL::MAP_WRITE);
		1614	substr $$mapped, 0, 4, "abcd";
		1615	} # asynchronously unmap because $mapped is destroyed
		1616
		1617	=item $mapped_image = $queue->map_image ($img, $blocking=1, $map_flags=OpenCL::MAP_READ|OpenCL::MAP_WRITE, $x=0, $y=0, $z=0, $width=undef, $height=undef, $depth=undef, $wait_events...)
		1618
		1619	Maps the given image area into host memory and return an
		1620	C<OpenCL::MappedImage> object.
		1621
		1622	If any of C<$width>, C<$height> and/or C<$depth> are C<undef> then they
		1623	will be replaced by the maximum possible value.
		1624
		1625	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapImage.html>
		1626
		1627	Example: map an image (with OpenCL::UNSIGNED_INT8 channel type) and set
		1628	the first channel of the leftmost column to 5, then explicitly unmap
		1629	it. You are not necessarily meant to do it this way, this example just
		1630	shows you the accessors to use :)
		1631
		1632	my $mapped = $queue->map_image ($image, 1, OpenCL::MAP_WRITE);
		1633
		1634	$mapped->write ($_ * $mapped->row_pitch, pack "C", 5)
		1635	for 0 .. $mapped->height - 1;
		1636
		1637	$mapped->unmap;.
		1638	$mapped->wait; # only needed for out of order queues normally
		1639
		1640	=item $ev = $queue->unmap ($mapped, $wait_events...)
		1641
		1642	Unmaps the data from host memory. You must not call any methods that
		1643	modify the data, or modify the data scalar directly, after calling this
		1644	method.
		1645
		1646	The mapped event object will always be passed as part of the
		1647	$wait_events. The mapped event object will be replaced by the new event
		1648	object that this request creates.
869		1649
870	=back	1650	=back
871		1651
872	=head2 THE OpenCL::Memory CLASS	1652	=head2 THE OpenCL::Memory CLASS
873		1653
…		…
880		1660
881	See C<< $platform->info >> for details.	1661	See C<< $platform->info >> for details.
882		1662
883	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>	1663	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>
884		1664
		1665	=item $memory->destructor_callback ($cb->())
		1666
		1667	Sets a callback that will be invoked after the memory object is destructed.
		1668
		1669	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetMemObjectDestructorCallback.html>
		1670
885	=for gengetinfo begin mem	1671	=for gengetinfo begin mem
886		1672
887	=item $mem_object_type = $mem->type	1673	=item $mem_object_type = $mem->type
888		1674
889	Calls C<clGetMemObjectInfo> with C<CL_MEM_TYPE> and returns the result(s).	1675	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_TYPE> and returns the result.
890		1676
891	=item $mem_flags = $mem->flags	1677	=item $mem_flags = $mem->flags
892		1678
893	Calls C<clGetMemObjectInfo> with C<CL_MEM_FLAGS> and returns the result(s).	1679	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_FLAGS> and returns the result.
894		1680
895	=item $int = $mem->size	1681	=item $int = $mem->size
896		1682
897	Calls C<clGetMemObjectInfo> with C<CL_MEM_SIZE> and returns the result(s).	1683	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_SIZE> and returns the result.
898		1684
899	=item $ptr_value = $mem->host_ptr	1685	=item $ptr_value = $mem->host_ptr
900		1686
901	Calls C<clGetMemObjectInfo> with C<CL_MEM_HOST_PTR> and returns the result(s).	1687	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_HOST_PTR> and returns the result.
902		1688
903	=item $uint = $mem->map_count	1689	=item $uint = $mem->map_count
904		1690
905	Calls C<clGetMemObjectInfo> with C<CL_MEM_MAP_COUNT> and returns the result(s).	1691	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_MAP_COUNT> and returns the result.
906		1692
907	=item $uint = $mem->reference_count	1693	=item $uint = $mem->reference_count
908		1694
909	Calls C<clGetMemObjectInfo> with C<CL_MEM_REFERENCE_COUNT> and returns the result(s).	1695	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_REFERENCE_COUNT> and returns the result.
910		1696
911	=item $ctx = $mem->context	1697	=item $ctx = $mem->context
912		1698
913	Calls C<clGetMemObjectInfo> with C<CL_MEM_CONTEXT> and returns the result(s).	1699	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_CONTEXT> and returns the result.
914		1700
915	=item $mem = $mem->associated_memobject	1701	=item $mem = $mem->associated_memobject
916		1702
917	Calls C<clGetMemObjectInfo> with C<CL_MEM_ASSOCIATED_MEMOBJECT> and returns the result(s).	1703	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_ASSOCIATED_MEMOBJECT> and returns the result.
918		1704
919	=item $int = $mem->offset	1705	=item $int = $mem->offset
920		1706
921	Calls C<clGetMemObjectInfo> with C<CL_MEM_OFFSET> and returns the result(s).	1707	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_OFFSET> and returns the result.
922		1708
923	=for gengetinfo end mem	1709	=for gengetinfo end mem
924		1710
		1711	=item ($type, $name) = $mem->gl_object_info
		1712
		1713	Returns the OpenGL object type (e.g. OpenCL::GL_OBJECT_TEXTURE2D) and the
		1714	object "name" (e.g. the texture name) used to create this memory object.
		1715
		1716	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetGLObjectInfo.html>
		1717
925	=back	1718	=back
926		1719
		1720	=head2 THE OpenCL::Buffer CLASS
		1721
		1722	This is a subclass of OpenCL::Memory, and the superclass of
		1723	OpenCL::BufferObj. Its purpose is simply to distinguish between buffers
		1724	and sub-buffers.
		1725
		1726	=head2 THE OpenCL::BufferObj CLASS
		1727
		1728	This is a subclass of OpenCL::Buffer and thus OpenCL::Memory. It exists
		1729	because one cna create sub buffers of OpenLC::BufferObj objects, but not
		1730	sub buffers from these sub buffers.
		1731
		1732	=over 4
		1733
		1734	=item $subbuf = $buf_obj->sub_buffer_region ($flags, $origin, $size)
		1735
		1736	Creates an OpenCL::Buffer objects from this buffer and returns it. The
		1737	C<buffer_create_type> is assumed to be C<OpenCL::BUFFER_CREATE_TYPE_REGION>.
		1738
		1739	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSubBuffer.html>
		1740
		1741	=back
		1742
927	=head2 THE OpenCL::Image CLASS	1743	=head2 THE OpenCL::Image CLASS
928		1744
929	This is the superclass of all image objects - OpenCL::Image2D and OpenCL::Image3D.	1745	This is the superclass of all image objects - OpenCL::Image1D,
		1746	OpenCL::Image1DArray, OpenCL::Image1DBuffer, OpenCL::Image2D,
		1747	OpenCL::Image2DArray and OpenCL::Image3D.
930		1748
931	=over 4	1749	=over 4
932		1750
933	=item $packed_value = $ev->image_info ($name)	1751	=item $packed_value = $image->image_info ($name)
934		1752
935	See C<< $platform->info >> for details.	1753	See C<< $platform->info >> for details.
936		1754
937	The reason this method is not called C<info> is that there already is an	1755	The reason this method is not called C<info> is that there already is an
938	C<< ->info >> method inherited from C<OpenCL::Memory>.	1756	C<< ->info >> method inherited from C<OpenCL::Memory>.
939		1757
940	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>	1758	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>
941		1759
		1760	=item ($channel_order, $channel_data_type) = $image->format
		1761
		1762	Returns the channel order and type used to create the image by calling
		1763	C<clGetImageInfo> with C<OpenCL::IMAGE_FORMAT>.
		1764
942	=for gengetinfo begin image	1765	=for gengetinfo begin image
943		1766
944	=item $int = $image->element_size	1767	=item $int = $image->element_size
945		1768
946	Calls C<clGetImageInfo> with C<CL_IMAGE_ELEMENT_SIZE> and returns the result(s).	1769	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_ELEMENT_SIZE> and returns the result.
947		1770
948	=item $int = $image->row_pitch	1771	=item $int = $image->row_pitch
949		1772
950	Calls C<clGetImageInfo> with C<CL_IMAGE_ROW_PITCH> and returns the result(s).	1773	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_ROW_PITCH> and returns the result.
951		1774
952	=item $int = $image->slice_pitch	1775	=item $int = $image->slice_pitch
953		1776
954	Calls C<clGetImageInfo> with C<CL_IMAGE_SLICE_PITCH> and returns the result(s).	1777	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_SLICE_PITCH> and returns the result.
955		1778
956	=item $int = $image->width	1779	=item $int = $image->width
957		1780
958	Calls C<clGetImageInfo> with C<CL_IMAGE_WIDTH> and returns the result(s).	1781	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_WIDTH> and returns the result.
959		1782
960	=item $int = $image->height	1783	=item $int = $image->height
961		1784
962	Calls C<clGetImageInfo> with C<CL_IMAGE_HEIGHT> and returns the result(s).	1785	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_HEIGHT> and returns the result.
963		1786
964	=item $int = $image->depth	1787	=item $int = $image->depth
965		1788
966	Calls C<clGetImageInfo> with C<CL_IMAGE_DEPTH> and returns the result(s).	1789	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_DEPTH> and returns the result.
967		1790
968	=for gengetinfo end image	1791	=for gengetinfo end image
969		1792
		1793	=for gengetinfo begin gl_texture
		1794
		1795	=item $GLenum = $gl_texture->target
		1796
		1797	Calls C<clGetGLTextureInfo> with C<OpenCL::GL_TEXTURE_TARGET> and returns the result.
		1798
		1799	=item $GLint = $gl_texture->gl_mipmap_level
		1800
		1801	Calls C<clGetGLTextureInfo> with C<OpenCL::GL_MIPMAP_LEVEL> and returns the result.
		1802
		1803	=for gengetinfo end gl_texture
		1804
970	=back	1805	=back
971		1806
972	=head2 THE OpenCL::Sampler CLASS	1807	=head2 THE OpenCL::Sampler CLASS
973		1808
974	=over 4	1809	=over 4
…		…
981		1816
982	=for gengetinfo begin sampler	1817	=for gengetinfo begin sampler
983		1818
984	=item $uint = $sampler->reference_count	1819	=item $uint = $sampler->reference_count
985		1820
986	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_REFERENCE_COUNT> and returns the result(s).	1821	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_REFERENCE_COUNT> and returns the result.
987		1822
988	=item $ctx = $sampler->context	1823	=item $ctx = $sampler->context
989		1824
990	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_CONTEXT> and returns the result(s).	1825	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_CONTEXT> and returns the result.
991		1826
992	=item $addressing_mode = $sampler->normalized_coords	1827	=item $addressing_mode = $sampler->normalized_coords
993		1828
994	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_NORMALIZED_COORDS> and returns the result(s).	1829	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_NORMALIZED_COORDS> and returns the result.
995		1830
996	=item $filter_mode = $sampler->addressing_mode	1831	=item $filter_mode = $sampler->addressing_mode
997		1832
998	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_ADDRESSING_MODE> and returns the result(s).	1833	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_ADDRESSING_MODE> and returns the result.
999		1834
1000	=item $boolean = $sampler->filter_mode	1835	=item $boolean = $sampler->filter_mode
1001		1836
1002	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_FILTER_MODE> and returns the result(s).	1837	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_FILTER_MODE> and returns the result.
1003		1838
1004	=for gengetinfo end sampler	1839	=for gengetinfo end sampler
1005		1840
1006	=back	1841	=back
1007		1842
1008	=head2 THE OpenCL::Program CLASS	1843	=head2 THE OpenCL::Program CLASS
1009		1844
1010	=over 4	1845	=over 4
1011		1846
1012	=item $program->build ($device, $options = "")	1847	=item $program->build (\@devices = undef, $options = "", $cb->($program) = undef)
1013		1848
1014	Tries to build the program with the givne options.	1849	Tries to build the program with the given options. See also the
		1850	C<$ctx->build> convenience function.
		1851
		1852	If a callback is specified, then it will be called when compilation is
		1853	finished. Note that many OpenCL implementations block your program while
		1854	compiling whether you use a callback or not. See C<build_async> if you
		1855	want to make sure the build is done in the background.
		1856
		1857	Note that some OpenCL implementations act up badly, and don't call the
		1858	callback in some error cases (but call it in others). This implementation
		1859	assumes the callback will always be called, and leaks memory if this is
		1860	not so. So best make sure you don't pass in invalid values.
		1861
		1862	Some implementations fail with C<OpenCL::INVALID_BINARY> when the
		1863	compilation state is successful but some later stage fails.
		1864
		1865	options: C<-D name>, C<-D name=definition>, C<-I dir>,
		1866	C<-cl-single-precision-constant>, C<-cl-denorms-are-zero>,
		1867	C<-cl-fp32-correctly-rounded-divide-sqrt>, C<-cl-opt-disable>,
		1868	C<-cl-mad-enable>, C<-cl-no-signed-zeros>, C<-cl-unsafe-math-optimizations>,
		1869	C<-cl-finite-math-only>, C<-cl-fast-relaxed-math>,
		1870	C<-w>, C<-Werror>, C<-cl-std=CL1.1/CL1.2>, C<-cl-kernel-arg-info>,
		1871	C<-create-library>, C<-enable-link-options>.
		1872
		1873	build_status: OpenCL::BUILD_SUCCESS, OpenCL::BUILD_NONE,
		1874	OpenCL::BUILD_ERROR, OpenCL::BUILD_IN_PROGRESS.
1015		1875
1016	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>	1876	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>
		1877
		1878	=item $program->build_async (\@devices = undef, $options = "", $cb->($program) = undef)
		1879
		1880	Similar to C<< ->build >>, except it starts a thread, and never fails (you
		1881	need to check the compilation status form the callback, or by polling).
		1882
		1883	=item $program->compile (\@devices = undef, $options = "", \%headers = undef, $cb->($program) = undef)
		1884
		1885	Compiles the given program for the given devices (or all devices if
		1886	undef). If C<$headers> is given, it must be a hashref with include name =>
		1887	OpenCL::Program pairs.
		1888
		1889	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCompileProgram.html>
1017		1890
1018	=item $packed_value = $program->build_info ($device, $name)	1891	=item $packed_value = $program->build_info ($device, $name)
1019		1892
1020	Similar to C<< $platform->info >>, but returns build info for a previous	1893	Similar to C<< $platform->info >>, but returns build info for a previous
1021	build attempt for the given device.	1894	build attempt for the given device.
1022		1895
		1896	binary_type: OpenCL::PROGRAM_BINARY_TYPE_NONE,
		1897	OpenCL::PROGRAM_BINARY_TYPE_COMPILED_OBJECT,
		1898	OpenCL::PROGRAM_BINARY_TYPE_LIBRARY,
		1899	OpenCL::PROGRAM_BINARY_TYPE_EXECUTABLE.
		1900
1023	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetBuildInfo.html>	1901	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetBuildInfo.html>
1024		1902
1025	=item $kernel = $program->kernel ($function_name)	1903	=item $kernel = $program->kernel ($function_name)
1026		1904
1027	Creates an OpenCL::Kernel object out of the named C<__kernel> function in	1905	Creates an OpenCL::Kernel object out of the named C<__kernel> function in
1028	the program.	1906	the program.
1029		1907
1030	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>	1908	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>
1031		1909
		1910	=item @kernels = $program->kernels_in_program
		1911
		1912	Returns all kernels successfully compiled for all devices in program.
		1913
		1914	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernelsInProgram.html
		1915
1032	=for gengetinfo begin program_build	1916	=for gengetinfo begin program_build
1033		1917
1034	=item $build_status = $program->build_status ($device)	1918	=item $build_status = $program->build_status ($device)
1035		1919
1036	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_STATUS> and returns the result(s).	1920	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_STATUS> and returns the result.
1037		1921
1038	=item $string = $program->build_options ($device)	1922	=item $string = $program->build_options ($device)
1039		1923
1040	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_OPTIONS> and returns the result(s).	1924	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_OPTIONS> and returns the result.
1041		1925
1042	=item $string = $program->build_log ($device)	1926	=item $string = $program->build_log ($device)
1043		1927
1044	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_LOG> and returns the result(s).	1928	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_LOG> and returns the result.
		1929
		1930	=item $binary_type = $program->binary_type ($device)
		1931
		1932	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BINARY_TYPE> and returns the result.
1045		1933
1046	=for gengetinfo end program_build	1934	=for gengetinfo end program_build
1047		1935
1048	=item $packed_value = $program->info ($name)	1936	=item $packed_value = $program->info ($name)
1049		1937
…		…
1053		1941
1054	=for gengetinfo begin program	1942	=for gengetinfo begin program
1055		1943
1056	=item $uint = $program->reference_count	1944	=item $uint = $program->reference_count
1057		1945
1058	Calls C<clGetProgramInfo> with C<CL_PROGRAM_REFERENCE_COUNT> and returns the result(s).	1946	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_REFERENCE_COUNT> and returns the result.
1059		1947
1060	=item $ctx = $program->context	1948	=item $ctx = $program->context
1061		1949
1062	Calls C<clGetProgramInfo> with C<CL_PROGRAM_CONTEXT> and returns the result(s).	1950	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_CONTEXT> and returns the result.
1063		1951
1064	=item $uint = $program->num_devices	1952	=item $uint = $program->num_devices
1065		1953
1066	Calls C<clGetProgramInfo> with C<CL_PROGRAM_NUM_DEVICES> and returns the result(s).	1954	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_NUM_DEVICES> and returns the result.
1067		1955
1068	=item @devices = $program->devices	1956	=item @devices = $program->devices
1069		1957
1070	Calls C<clGetProgramInfo> with C<CL_PROGRAM_DEVICES> and returns the result(s).	1958	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_DEVICES> and returns the result.
1071		1959
1072	=item $string = $program->source	1960	=item $string = $program->source
1073		1961
1074	Calls C<clGetProgramInfo> with C<CL_PROGRAM_SOURCE> and returns the result(s).	1962	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_SOURCE> and returns the result.
1075		1963
1076	=item @ints = $program->binary_sizes	1964	=item @ints = $program->binary_sizes
1077		1965
1078	Calls C<clGetProgramInfo> with C<CL_PROGRAM_BINARY_SIZES> and returns the result(s).	1966	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_BINARY_SIZES> and returns the result.
1079		1967
1080	=for gengetinfo end program	1968	=for gengetinfo end program
1081		1969
		1970	=item @blobs = $program->binaries
		1971
		1972	Returns a string for the compiled binary for every device associated with
		1973	the program, empty strings indicate missing programs, and an empty result
		1974	means no program binaries are available.
		1975
		1976	These "binaries" are often, in fact, informative low-level assembly
		1977	sources.
		1978
		1979	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1980
1082	=back	1981	=back
1083		1982
1084	=head2 THE OpenCL::Kernel CLASS	1983	=head2 THE OpenCL::Kernel CLASS
1085		1984
1086	=over 4	1985	=over 4
…		…
1093		1992
1094	=for gengetinfo begin kernel	1993	=for gengetinfo begin kernel
1095		1994
1096	=item $string = $kernel->function_name	1995	=item $string = $kernel->function_name
1097		1996
1098	Calls C<clGetKernelInfo> with C<CL_KERNEL_FUNCTION_NAME> and returns the result(s).	1997	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_FUNCTION_NAME> and returns the result.
1099		1998
1100	=item $uint = $kernel->num_args	1999	=item $uint = $kernel->num_args
1101		2000
1102	Calls C<clGetKernelInfo> with C<CL_KERNEL_NUM_ARGS> and returns the result(s).	2001	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_NUM_ARGS> and returns the result.
1103		2002
1104	=item $uint = $kernel->reference_count	2003	=item $uint = $kernel->reference_count
1105		2004
1106	Calls C<clGetKernelInfo> with C<CL_KERNEL_REFERENCE_COUNT> and returns the result(s).	2005	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_REFERENCE_COUNT> and returns the result.
1107		2006
1108	=item $ctx = $kernel->context	2007	=item $ctx = $kernel->context
1109		2008
1110	Calls C<clGetKernelInfo> with C<CL_KERNEL_CONTEXT> and returns the result(s).	2009	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_CONTEXT> and returns the result.
1111		2010
1112	=item $program = $kernel->program	2011	=item $program = $kernel->program
1113		2012
1114	Calls C<clGetKernelInfo> with C<CL_KERNEL_PROGRAM> and returns the result(s).	2013	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_PROGRAM> and returns the result.
1115		2014
1116	=for gengetinfo end kernel	2015	=for gengetinfo end kernel
1117		2016
1118	=item $packed_value = $kernel->work_group_info ($device, $name)	2017	=item $packed_value = $kernel->work_group_info ($device, $name)
		2018
		2019	See C<< $platform->info >> for details.
		2020
		2021	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
		2022
		2023	=for gengetinfo begin kernel_work_group
		2024
		2025	=item $int = $kernel->work_group_size ($device)
		2026
		2027	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_WORK_GROUP_SIZE> and returns the result.
		2028
		2029	=item @ints = $kernel->compile_work_group_size ($device)
		2030
		2031	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result.
		2032
		2033	=item $ulong = $kernel->local_mem_size ($device)
		2034
		2035	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_LOCAL_MEM_SIZE> and returns the result.
		2036
		2037	=item $int = $kernel->preferred_work_group_size_multiple ($device)
		2038
		2039	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result.
		2040
		2041	=item $ulong = $kernel->private_mem_size ($device)
		2042
		2043	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_PRIVATE_MEM_SIZE> and returns the result.
		2044
		2045	=for gengetinfo end kernel_work_group
		2046
		2047	=item $packed_value = $kernel->arg_info ($idx, $name)
		2048
		2049	See C<< $platform->info >> for details.
		2050
		2051	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clGetKernelArgInfo.html>
		2052
		2053	=for gengetinfo begin kernel_arg
		2054
		2055	=item $kernel_arg_address_qualifier = $kernel->arg_address_qualifier ($idx)
		2056
		2057	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_ADDRESS_QUALIFIER> and returns the result.
		2058
		2059	=item $kernel_arg_access_qualifier = $kernel->arg_access_qualifier ($idx)
		2060
		2061	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_ACCESS_QUALIFIER> and returns the result.
		2062
		2063	=item $string = $kernel->arg_type_name ($idx)
		2064
		2065	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_TYPE_NAME> and returns the result.
		2066
		2067	=item $kernel_arg_type_qualifier = $kernel->arg_type_qualifier ($idx)
		2068
		2069	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_TYPE_QUALIFIER> and returns the result.
		2070
		2071	=item $string = $kernel->arg_name ($idx)
		2072
		2073	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_NAME> and returns the result.
		2074
		2075	=for gengetinfo end kernel_arg
		2076
		2077	=item $kernel->setf ($format, ...)
		2078
		2079	Sets the arguments of a kernel. Since OpenCL 1.1 doesn't have a generic
		2080	way to set arguments (and with OpenCL 1.2 it might be rather slow), you
		2081	need to specify a format argument, much as with C<printf>, to tell OpenCL
		2082	what type of argument it is.
		2083
		2084	The format arguments are single letters:
		2085
		2086	c char
		2087	C unsigned char
		2088	s short
		2089	S unsigned short
		2090	i int
		2091	I unsigned int
		2092	l long
		2093	L unsigned long
		2094
		2095	h half float (0..65535)
		2096	f float
		2097	d double
		2098
		2099	z local (octet size)
		2100
		2101	m memory object (buffer or image)
		2102	a sampler
		2103	e event
		2104
		2105	Space characters in the format string are ignored.
		2106
		2107	Example: set the arguments for a kernel that expects an int, two floats, a buffer and an image.
		2108
		2109	$kernel->setf ("i ff mm", 5, 0.5, 3, $buffer, $image);
		2110
		2111	=item $kernel->set_TYPE ($index, $value)
		2112
		2113	=item $kernel->set_char ($index, $value)
		2114
		2115	=item $kernel->set_uchar ($index, $value)
		2116
		2117	=item $kernel->set_short ($index, $value)
		2118
		2119	=item $kernel->set_ushort ($index, $value)
		2120
		2121	=item $kernel->set_int ($index, $value)
		2122
		2123	=item $kernel->set_uint ($index, $value)
		2124
		2125	=item $kernel->set_long ($index, $value)
		2126
		2127	=item $kernel->set_ulong ($index, $value)
		2128
		2129	=item $kernel->set_half ($index, $value)
		2130
		2131	=item $kernel->set_float ($index, $value)
		2132
		2133	=item $kernel->set_double ($index, $value)
		2134
		2135	=item $kernel->set_memory ($index, $value)
		2136
		2137	=item $kernel->set_buffer ($index, $value)
		2138
		2139	=item $kernel->set_image ($index, $value)
		2140
		2141	=item $kernel->set_sampler ($index, $value)
		2142
		2143	=item $kernel->set_local ($index, $value)
		2144
		2145	=item $kernel->set_event ($index, $value)
		2146
		2147	This is a family of methods to set the kernel argument with the number
		2148	C<$index> to the give C<$value>.
		2149
		2150	Chars and integers (including the half type) are specified as integers,
		2151	float and double as floating point values, memory/buffer/image must be
		2152	an object of that type or C<undef>, local-memory arguments are set by
		2153	specifying the size, and sampler and event must be objects of that type.
		2154
		2155	Note that C<set_memory> works for all memory objects (all types of buffers
		2156	and images) - the main purpose of the more specific C<set_TYPE> functions
		2157	is type checking.
		2158
		2159	Setting an argument for a kernel does NOT keep a reference to the object -
		2160	for example, if you set an argument to some image object, free the image,
		2161	and call the kernel, you will run into undefined behaviour.
		2162
		2163	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>
		2164
		2165	=back
		2166
		2167	=head2 THE OpenCL::Event CLASS
		2168
		2169	This is the superclass for all event objects (including OpenCL::UserEvent
		2170	objects).
		2171
		2172	=over 4
		2173
		2174	=item $ev->wait
		2175
		2176	Waits for the event to complete.
		2177
		2178	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
		2179
		2180	=item $ev->cb ($exec_callback_type, $callback->($event, $event_command_exec_status))
		2181
		2182	Adds a callback to the callback stack for the given event type. There is
		2183	no way to remove a callback again.
		2184
		2185	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetEventCallback.html>
		2186
		2187	=item $packed_value = $ev->info ($name)
		2188
		2189	See C<< $platform->info >> for details.
		2190
		2191	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
		2192
		2193	=for gengetinfo begin event
		2194
		2195	=item $queue = $event->command_queue
		2196
		2197	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_QUEUE> and returns the result.
		2198
		2199	=item $command_type = $event->command_type
		2200
		2201	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_TYPE> and returns the result.
		2202
		2203	=item $uint = $event->reference_count
		2204
		2205	Calls C<clGetEventInfo> with C<OpenCL::EVENT_REFERENCE_COUNT> and returns the result.
		2206
		2207	=item $uint = $event->command_execution_status
		2208
		2209	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_EXECUTION_STATUS> and returns the result.
		2210
		2211	=item $ctx = $event->context
		2212
		2213	Calls C<clGetEventInfo> with C<OpenCL::EVENT_CONTEXT> and returns the result.
		2214
		2215	=for gengetinfo end event
		2216
		2217	=item $packed_value = $ev->profiling_info ($name)
1119		2218
1120	See C<< $platform->info >> for details.	2219	See C<< $platform->info >> for details.
1121		2220
1122	The reason this method is not called C<info> is that there already is an	2221	The reason this method is not called C<info> is that there already is an
1123	C<< ->info >> method.	2222	C<< ->info >> method.
1124		2223
1125	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
1126
1127	=for gengetinfo begin kernel_work_group
1128
1129	=item $int = $kernel->work_group_size ($device)
1130
1131	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_WORK_GROUP_SIZE> and returns the result(s).
1132
1133	=item @ints = $kernel->compile_work_group_size ($device)
1134
1135	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result(s).
1136
1137	=item $ulong = $kernel->local_mem_size ($device)
1138
1139	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_LOCAL_MEM_SIZE> and returns the result(s).
1140
1141	=item $int = $kernel->preferred_work_group_size_multiple ($device)
1142
1143	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result(s).
1144
1145	=item $ulong = $kernel->private_mem_size ($device)
1146
1147	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PRIVATE_MEM_SIZE> and returns the result(s).
1148
1149	=for gengetinfo end kernel_work_group
1150
1151	=item $kernel->set_TYPE ($index, $value)
1152
1153	This is a family of methods to set the kernel argument with the number C<$index> to the give C<$value>.
1154
1155	TYPE is one of C<char>, C<uchar>, C<short>, C<ushort>, C<int>, C<uint>,
1156	C<long>, C<ulong>, C<half>, C<float>, C<double>, C<memory>, C<buffer>,
1157	C<image2d>, C<image3d>, C<sampler> or C<event>.
1158
1159	Chars and integers (including the half type) are specified as integers,
1160	float and double as floating point values, memory/buffer/image2d/image3d
1161	must be an object of that type or C<undef>, and sampler and event must be
1162	objects of that type.
1163
1164	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>	2224	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
		2225
		2226	=for gengetinfo begin profiling
		2227
		2228	=item $ulong = $event->profiling_command_queued
		2229
		2230	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_QUEUED> and returns the result.
		2231
		2232	=item $ulong = $event->profiling_command_submit
		2233
		2234	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_SUBMIT> and returns the result.
		2235
		2236	=item $ulong = $event->profiling_command_start
		2237
		2238	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_START> and returns the result.
		2239
		2240	=item $ulong = $event->profiling_command_end
		2241
		2242	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_END> and returns the result.
		2243
		2244	=for gengetinfo end profiling
1165		2245
1166	=back	2246	=back
1167		2247
1168	=head2 THE OpenCL::Event CLASS	2248	=head2 THE OpenCL::UserEvent CLASS
1169		2249
1170	This is the superclass for all event objects (including OpenCL::UserEvent	2250	This is a subclass of OpenCL::Event.
1171	objects).
1172		2251
1173	=over 4	2252	=over 4
1174		2253
1175	=item $ev->wait	2254	=item $ev->set_status ($execution_status)
1176		2255
1177	Waits for the event to complete.	2256	Sets the execution status of the user event. Can only be called once,
		2257	either with OpenCL::COMPLETE or a negative number as status.
1178		2258
		2259	execution_status: OpenCL::COMPLETE or a negative integer.
		2260
1179	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	2261	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>
1180
1181	=item $packed_value = $ev->info ($name)
1182
1183	See C<< $platform->info >> for details.
1184
1185	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
1186
1187	=for gengetinfo begin event
1188
1189	=item $queue = $event->command_queue
1190
1191	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_QUEUE> and returns the result(s).
1192
1193	=item $command_type = $event->command_type
1194
1195	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_TYPE> and returns the result(s).
1196
1197	=item $uint = $event->reference_count
1198
1199	Calls C<clGetEventInfo> with C<CL_EVENT_REFERENCE_COUNT> and returns the result(s).
1200
1201	=item $uint = $event->command_execution_status
1202
1203	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_EXECUTION_STATUS> and returns the result(s).
1204
1205	=item $ctx = $event->context
1206
1207	Calls C<clGetEventInfo> with C<CL_EVENT_CONTEXT> and returns the result(s).
1208
1209	=for gengetinfo end event
1210
1211	=item $packed_value = $ev->profiling_info ($name)
1212
1213	See C<< $platform->info >> for details.
1214
1215	The reason this method is not called C<info> is that there already is an
1216	C<< ->info >> method.
1217
1218	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
1219
1220	=for gengetinfo begin profiling
1221
1222	=item $ulong = $event->profiling_command_queued
1223
1224	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_QUEUED> and returns the result(s).
1225
1226	=item $ulong = $event->profiling_command_submit
1227
1228	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_SUBMIT> and returns the result(s).
1229
1230	=item $ulong = $event->profiling_command_start
1231
1232	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_START> and returns the result(s).
1233
1234	=item $ulong = $event->profiling_command_end
1235
1236	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_END> and returns the result(s).
1237
1238	=for gengetinfo end profiling
1239		2262
1240	=back	2263	=back
1241		2264
1242	=head2 THE OpenCL::UserEvent CLASS	2265	=head2 THE OpenCL::Mapped CLASS
1243		2266
1244	This is a subclass of OpenCL::Event.	2267	This class represents objects mapped into host memory. They are
		2268	represented by a blessed string scalar. The string data is the mapped
		2269	memory area, that is, if you read or write it, then the mapped object is
		2270	accessed directly.
		2271
		2272	You must only ever use operations that modify the string in-place - for
		2273	example, a C<substr> that doesn't change the length, or maybe a regex that
		2274	doesn't change the length. Any other operation might cause the data to be
		2275	copied.
		2276
		2277	When the object is destroyed it will enqueue an implicit unmap operation
		2278	on the queue that was used to create it.
		2279
		2280	Keep in mind that you I<need> to unmap (or destroy) mapped objects before
		2281	OpenCL sees the changes, even if some implementations don't need this
		2282	sometimes.
		2283
		2284	Example, replace the first two floats in the mapped buffer by 1 and 2.
		2285
		2286	my $mapped = $queue->map_buffer ($buf, ...
		2287	$mapped->event->wait; # make sure it's there
		2288
		2289	# now replace first 8 bytes by new data, which is exactly 8 bytes long
		2290	# we blindly assume device endianness to equal host endianness
		2291	# (and of course, we assume iee 754 single precision floats :)
		2292	substr $$mapped, 0, 8, pack "f*", 1, 2;
1245		2293
1246	=over 4	2294	=over 4
1247		2295
1248	=item $ev->set_status ($execution_status)	2296	=item $ev = $mapped->unmap ($wait_events...)
1249		2297
1250	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>	2298	Unmaps the mapped memory object, using the queue originally used to create
		2299	it, quite similarly to C<< $queue->unmap ($mapped, ...) >>.
		2300
		2301	=item $bool = $mapped->mapped
		2302
		2303	Returns whether the object is still mapped - true before an C<unmap> is
		2304	enqueued, false afterwards.
		2305
		2306	=item $ev = $mapped->event
		2307
		2308	Return the event object associated with the mapped object. Initially, this
		2309	will be the event object created when mapping the object, and after an
		2310	unmap, this will be the event object that the unmap operation created.
		2311
		2312	=item $mapped->wait
		2313
		2314	Same as C<< $mapped->event->wait >> - makes sure no operations on this
		2315	mapped object are outstanding.
		2316
		2317	=item $bytes = $mapped->size
		2318
		2319	Returns the size of the mapped area, in bytes. Same as C<length $$mapped>.
		2320
		2321	=item $ptr = $mapped->ptr
		2322
		2323	Returns the raw memory address of the mapped area.
		2324
		2325	=item $mapped->set ($offset, $data)
		2326
		2327	Replaces the data at the given C<$offset> in the memory area by the new
		2328	C<$data>. This method is safer than direct manipulation of C<$mapped>
		2329	because it does bounds-checking, but also slower.
		2330
		2331	=item $data = $mapped->get ($offset, $length)
		2332
		2333	Returns (without copying) a scalar representing the data at the given
		2334	C<$offset> and C<$length> in the mapped memory area. This is the same as
		2335	the following substr, except much slower;
		2336
		2337	$data = substr $$mapped, $offset, $length
		2338
		2339	=cut
		2340
		2341	sub OpenCL::Mapped::get {
		2342	substr ${$_[0]}, $_[1], $_[2]
		2343	}
1251		2344
1252	=back	2345	=back
1253		2346
		2347	=head2 THE OpenCL::MappedBuffer CLASS
		2348
		2349	This is a subclass of OpenCL::Mapped, representing mapped buffers.
		2350
		2351	=head2 THE OpenCL::MappedImage CLASS
		2352
		2353	This is a subclass of OpenCL::Mapped, representing mapped images.
		2354
		2355	=over 4
		2356
		2357	=item $pixels = $mapped->width
		2358
		2359	=item $pixels = $mapped->height
		2360
		2361	=item $pixels = $mapped->depth
		2362
		2363	Return the width/height/depth of the mapped image region, in pixels.
		2364
		2365	=item $bytes = $mapped->row_pitch
		2366
		2367	=item $bytes = $mapped->slice_pitch
		2368
		2369	Return the row or slice pitch of the image that has been mapped.
		2370
		2371	=item $bytes = $mapped->element_size
		2372
		2373	Return the size of a single pixel.
		2374
		2375	=item $data = $mapped->get_row ($count, $x=0, $y=0, $z=0)
		2376
		2377	Return C<$count> pixels from the given coordinates. The pixel data must
		2378	be completely contained within a single row.
		2379
		2380	If C<$count> is C<undef>, then all the remaining pixels in that row are
		2381	returned.
		2382
		2383	=item $mapped->set_row ($data, $x=0, $y=0, $z=0)
		2384
		2385	Write the given pixel data at the given coordinate. The pixel data must
		2386	be completely contained within a single row.
		2387
		2388	=back
		2389
1254	=cut	2390	=cut
1255
1256	package OpenCL;
1257
1258	use common::sense;
1259
1260	BEGIN {
1261	our $VERSION = '0.55';
1262
1263	require XSLoader;
1264	XSLoader::load (__PACKAGE__, $VERSION);
1265
1266	@OpenCL::Buffer::ISA =
1267	@OpenCL::Image::ISA = OpenCL::Memory::;
1268
1269	@OpenCL::Image2D::ISA =
1270	@OpenCL::Image3D::ISA = OpenCL::Image::;
1271
1272	@OpenCL::UserEvent::ISA = OpenCL::Event::;
1273	}
1274		2391
1275	1;	2392	1;
1276		2393
1277	=head1 AUTHOR	2394	=head1 AUTHOR
1278		2395

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