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Comparing OpenCL/OpenCL.pm (file contents):
Revision 1.26 by root, Tue Nov 22 10:44:56 2011 UTC vs.
Revision 1.80 by root, Sat May 5 13:55:59 2012 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
…		…
105	for my $platform (OpenCL::platforms) {	109	for my $platform (OpenCL::platforms) {
106	printf "platform: %s\n", $platform->name;	110	printf "platform: %s\n", $platform->name;
107	printf "extensions: %s\n", $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->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_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 download it from
		219	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	for (OpenCL::platforms) {
		238	$platform = $_;
		239	for ($platform->devices) {
		240	$dev = $_;
		241	$ctx = $platform->context ([OpenCL::GLX_DISPLAY_KHR, undef, OpenCL::GL_CONTEXT_KHR, undef], [$dev])
		242	and last;
		243	}
		244	}
		245
		246	$ctx
		247	or die "cannot find suitable OpenCL device\n";
		248
		249	my $queue = $ctx->queue ($dev);
		250
		251	# now attach an opencl image2d object to the opengl texture
		252	my $tex = $ctx->gl_texture2d (OpenCL::MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, $texid);
		253
		254	# now the boring opencl code
		255	my $src = <<EOF;
		256	kernel void
		257	juliatunnel (write_only image2d_t img, float time)
		258	{
		259	int2 xy = (int2)(get_global_id (0), get_global_id (1));
		260	float2 p = convert_float2 (xy) / $S.f * 2.f - 1.f;
		261
		262	float2 m = (float2)(1.f, p.y) / fabs (p.x); // tunnel
		263	m.x = fabs (fmod (m.x + time * 0.05f, 4.f) - 2.f);
		264
		265	float2 z = m;
		266	float2 c = (float2)(sin (time * 0.01133f), cos (time * 0.02521f));
		267
		268	for (int i = 0; i < 25 && dot (z, z) < 4.f; ++i) // standard julia
		269	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		270
		271	float3 colour = (float3)(z.x, z.y, atan2 (z.y, z.x));
		272	write_imagef (img, xy, (float4)(colour * p.x * p.x, 1.));
		273	}
		274	EOF
		275
		276	my $prog = $ctx->build_program ($src);
		277	my $kernel = $prog->kernel ("juliatunnel");
		278
		279	# program compiled, kernel ready, now draw and loop
		280
		281	for (my $time; ; ++$time) {
		282	# acquire objects from opengl
		283	$queue->acquire_gl_objects ([$tex]);
		284
		285	# configure and run our kernel
		286	$kernel->setf ("mf", $tex, $time*2); # mf = memory object, float
		287	$queue->nd_range_kernel ($kernel, undef, [$S, $S], undef);
		288
		289	# release objects to opengl again
		290	$queue->release_gl_objects ([$tex]);
		291
		292	# wait
		293	$queue->finish;
		294
		295	# now draw the texture, the defaults should be all right
		296	glTexParameterf GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST;
		297
		298	glEnable GL_TEXTURE_2D;
		299	glBegin GL_QUADS;
		300	glTexCoord2f 0, 1; glVertex3i -1, -1, -1;
		301	glTexCoord2f 0, 0; glVertex3i 1, -1, -1;
		302	glTexCoord2f 1, 0; glVertex3i 1, 1, -1;
		303	glTexCoord2f 1, 1; glVertex3i -1, 1, -1;
		304	glEnd;
		305
		306	glXSwapBuffers;
		307
		308	select undef, undef, undef, 1/60;
		309	}
		310
		311	=head2 How to modify the previous example to not rely on GL sharing.
		312
		313	For those poor souls with only a sucky CPU OpenCL implementation, you
		314	currently have to read the image into some perl scalar, and then modify a
		315	texture or use glDrawPixels or so).
		316
		317	First, when you don't need gl sharing, you can create the context much simpler:
		318
		319	$ctx = $platform->context (undef, [$dev])
		320
		321	To use a texture, you would modify the above example by creating an
		322	OpenCL::Image manually instead of deriving it from a texture:
		323
		324	my $tex = $ctx->image2d (OpenCL::MEM_WRITE_ONLY, OpenCL::RGBA, OpenCL::UNORM_INT8, $S, $S);
		325
		326	And in the draw loop, intead of acquire_gl_objects/release_gl_objects, you
		327	would read the image2d after the kernel has written it:
		328
		329	$queue->read_image ($tex, 0, 0, 0, 0, $S, $S, 1, 0, 0, my $data);
		330
		331	And then you would upload the pixel data to the texture (or use glDrawPixels):
		332
		333	glTexSubImage2D_s GL_TEXTURE_2D, 0, 0, 0, $S, $S, GL_RGBA, GL_UNSIGNED_BYTE, $data;
		334
		335	The fully modified example can be found at
		336	L<http://cvs.schmorp.de/OpenCL/examples/juliaflight-nosharing>.
		337
		338	=head2 Julia sets look soooo 80ies.
		339
		340	Then colour them differently, e.g. using orbit traps! Replace the loop and
		341	colour calculation from the previous examples by this:
		342
		343	float2 dm = (float2)(1.f, 1.f);
		344
		345	for (int i = 0; i < 25; ++i)
		346	{
		347	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		348	dm = fmin (dm, (float2)(fabs (dot (z, z) - 1.f), fabs (z.x - 1.f)));
		349	}
		350
		351	float3 colour = (float3)(dm.x * dm.y, dm.x * dm.y, dm.x);
		352
		353	Also try C<-10.f> instead of C<-1.f>.
215		354
216	=head1 DOCUMENTATION	355	=head1 DOCUMENTATION
217		356
218	=head2 BASIC CONVENTIONS	357	=head2 BASIC CONVENTIONS
219		358
…		…
241	=item * Structures are often specified by flattening out their components	380	=item * Structures are often specified by flattening out their components
242	as with short vectors, and returned as arrayrefs.	381	as with short vectors, and returned as arrayrefs.
243		382
244	=item * When enqueuing commands, the wait list is specified by adding	383	=item * When enqueuing commands, the wait list is specified by adding
245	extra arguments to the function - anywhere a C<$wait_events...> argument	384	extra arguments to the function - anywhere a C<$wait_events...> argument
246	is documented this can be any number of event objects.	385	is documented this can be any number of event objects. As an extsnion
		386	implemented by this module, C<undef> values will be ignored in the event
		387	list.
247		388
248	=item * When enqueuing commands, if the enqueue method is called in void	389	=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	390	context, no event is created. In all other contexts an event is returned
250	by the method.	391	by the method.
251		392
252	=item * This module expects all functions to return C<CL_SUCCESS>. If any	393	=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	394	other status is returned the function will throw an exception, so you
254	don't normally have to to any error checking.	395	don't normally have to to any error checking.
255		396
256	=back	397	=back
		398
		399	=head2 CONSTANTS
		400
		401	All C<CL_xxx> constants that this module supports are always available
		402	in the C<OpenCL> namespace as C<OpenCL::xxx> (i.e. without the C<CL_>
		403	prefix). Constants which are not defined in the heaer files used during
		404	compilation, or otherwise are not available, will have the value C<-1>.
		405
		406	=head2 OPENCL 1.1 VS. OPENCL 1.2
		407
		408	This module supports both OpenCL version 1.1 and 1.2, although the OpenCL
		409	1.2 interface hasn't been tested much for lack of availability of an
		410	actual implementation.
		411
		412	Every function or method in this manual page that interfaces to a
		413	particular OpenCL function has a link to the its C manual page.
		414
		415	If the link contains a F<1.1>, then this function is an OpenCL 1.1
		416	function. Most but not all also exist in OpenCL 1.2, and this module
		417	tries to emulate the missing ones for you, when told to do so at
		418	compiletime. You cna check whether a function was removed in OpenCL 1.2 by
		419	replacing the F<1.1> component in the URL by F<1.2>.
		420
		421	If the link contains a F<1.2>, then this is a OpenCL 1.2-only
		422	function. Even if the module was compiled with OpenCL 1.2 header files
		423	and has an 1.2 OpenCL library, calling such a function on a platform that
		424	doesn't implement 1.2 causes undefined behaviour, usually a crash (But
		425	this is not guaranteed).
		426
		427	You can find out whether this module was compiled to prefer 1.1
		428	functionality by ooking at C<OpenCL::PREFER_1_1> - if it is true, then
		429	1.1 functions generally are implemented using 1.1 OpenCL functions. If it
		430	is false, then 1.1 functions missing from 1.2 are emulated by calling 1.2
		431	fucntions.
		432
		433	This is a somewhat sorry state of affairs, but the Khronos group choose to
		434	make every release of OpenCL source and binary incompatible with previous
		435	releases.
257		436
258	=head2 PERL AND OPENCL TYPES	437	=head2 PERL AND OPENCL TYPES
259		438
260	This handy(?) table lists OpenCL types and their perl, PDL and pack/unpack	439	This handy(?) table lists OpenCL types and their perl, PDL and pack/unpack
261	format equivalents:	440	format equivalents:
…		…
271	ulong IV - Q	450	ulong IV - Q
272	float NV float f	451	float NV float f
273	half IV ushort S	452	half IV ushort S
274	double NV double d	453	double NV double d
275		454
		455	=head2 GLX SUPPORT
		456
		457	Due to the sad state that OpenGL support is in in Perl (mostly the OpenGL
		458	module, which has little to no documentation and has little to no support
		459	for glX), this module, as a special extension, treats context creation
		460	properties C<OpenCL::GLX_DISPLAY_KHR> and C<OpenCL::GL_CONTEXT_KHR>
		461	specially: If either or both of these are C<undef>, then the OpenCL
		462	module tries to dynamically resolve C<glXGetCurrentDisplay> and
		463	C<glXGetCurrentContext>, call these functions and use their return values
		464	instead.
		465
		466	For this to work, the OpenGL library must be loaded, a GLX context must
		467	have been created and be made current, and C<dlsym> must be available and
		468	capable of finding the function via C<RTLD_DEFAULT>.
		469
		470	=head2 EVENT SYSTEM
		471
		472	OpenCL can generate a number of (potentially) asynchronous events, for
		473	example, after compiling a program, to signal a context-related error or,
		474	perhaps most important, to signal completion of queued jobs (by setting
		475	callbacks on OpenCL::Event objects).
		476
		477	The OpenCL module converts all these callbacks into events - you can
		478	still register callbacks, but they are not executed when your OpenCL
		479	implementation calls the actual callback, but only later. Therefore, none
		480	of the limitations of OpenCL callbacks apply to the perl implementation:
		481	it is perfectly safe to make blocking operations from event callbacks, and
		482	enqueued operations don't need to be flushed.
		483
		484	To facilitate this, this module maintains an event queue - each
		485	time an asynchronous event happens, it is queued, and perl will be
		486	interrupted. This is implemented via the L<Async::Interrupt> module. In
		487	addition, this module has L<AnyEvent> support, so it can seamlessly
		488	integrate itself into many event loops.
		489
		490	Since L<Async::Interrupt> is a bit hard to understand, here are some case examples:
		491
		492	=head3 Don't use callbacks.
		493
		494	When your program never uses any callbacks, then there will never be any
		495	notifications you need to take care of, and therefore no need to worry
		496	about all this.
		497
		498	You can achieve a great deal by explicitly waiting for events, or using
		499	barriers and flush calls. In many programs, there is no need at all to
		500	tinker with asynchronous events.
		501
		502	=head3 Use AnyEvent
		503
		504	This module automatically registers a watcher that invokes all outstanding
		505	event callbacks when AnyEvent is initialised (and block asynchronous
		506	interruptions). Using this mode of operations is the safest and most
		507	recommended one.
		508
		509	To use this, simply use AnyEvent and this module normally, make sure you
		510	have an event loop running:
		511
		512	use Gtk2 -init;
		513	use AnyEvent;
		514
		515	# initialise AnyEvent, by creating a watcher, or:
		516	AnyEvent::detect;
		517
		518	my $e = $queue->marker;
		519	$e->cb (sub {
		520	warn "opencl is finished\n";
		521	})
		522
		523	main Gtk2;
		524
		525	Note that this module will not initialise AnyEvent for you. Before
		526	AnyEvent is initialised, the module will asynchronously interrupt perl
		527	instead. To avoid any surprises, it's best to explicitly initialise
		528	AnyEvent.
		529
		530	You can temporarily enable asynchronous interruptions (see next paragraph)
		531	by calling C<$OpenCL::INTERRUPT->unblock> and disable them again by
		532	calling C<$OpenCL::INTERRUPT->block>.
		533
		534	=head3 Let yourself be interrupted at any time
		535
		536	This mode is the default unless AnyEvent is loaded and initialised. In
		537	this mode, OpenCL asynchronously interrupts a running perl program. The
		538	emphasis is on both I<asynchronously> and I<running> here.
		539
		540	Asynchronously means that perl might execute your callbacks at any
		541	time. For example, in the following code (I<THAT YOU SHOULD NOT COPY>),
		542	the C<until> loop following the marker call will be interrupted by the
		543	callback:
		544
		545	my $e = $queue->marker;
		546	my $flag;
		547	$e->cb (sub { $flag = 1 });
		548	1 until $flag;
		549	# $flag is now 1
		550
		551	The reason why you shouldn't blindly copy the above code is that
		552	busy waiting is a really really bad thing, and really really bad for
		553	performance.
		554
		555	While at first this asynchronous business might look exciting, it can be
		556	really hard, because you need to be prepared for the callback code to be
		557	executed at any time, which limits the amount of things the callback code
		558	can do safely.
		559
		560	This can be mitigated somewhat by using C<<
		561	$OpenCL::INTERRUPT->scope_block >> (see the L<Async::Interrupt>
		562	documentation for details).
		563
		564	The other problem is that your program must be actively I<running> to be
		565	interrupted. When you calculate stuff, your program is running. When you
		566	hang in some C functions or other block execution (by calling C<sleep>,
		567	C<select>, running an event loop and so on), your program is waiting, not
		568	running.
		569
		570	One way around that would be to attach a read watcher to your event loop,
		571	listening for events on C<< $OpenCL::INTERRUPT->pipe_fileno >>, using a
		572	dummy callback (C<sub { }>) to temporarily execute some perl code.
		573
		574	That is then awfully close to using the built-in AnyEvent support above,
		575	though, so consider that one instead.
		576
		577	=head3 Be creative
		578
		579	OpenCL exports the L<Async::Interrupt> object it uses in the global
		580	variable C<$OpenCL::INTERRUPT>. You can configure it in any way you like.
		581
		582	So if you want to feel like a real pro, err, wait, if you feel no risk
		583	menas no fun, you can experiment by implementing your own mode of
		584	operations.
		585
		586	=cut
		587
		588	package OpenCL;
		589
		590	use common::sense;
		591	use Carp ();
		592	use Async::Interrupt ();
		593
		594	our $POLL_FUNC; # set by XS
		595
		596	BEGIN {
		597	our $VERSION = '0.99';
		598
		599	require XSLoader;
		600	XSLoader::load (__PACKAGE__, $VERSION);
		601
		602	@OpenCL::Platform::ISA =
		603	@OpenCL::Device::ISA =
		604	@OpenCL::Context::ISA =
		605	@OpenCL::Queue::ISA =
		606	@OpenCL::Memory::ISA =
		607	@OpenCL::Sampler::ISA =
		608	@OpenCL::Program::ISA =
		609	@OpenCL::Kernel::ISA =
		610	@OpenCL::Event::ISA = OpenCL::Object::;
		611
		612	@OpenCL::SubDevice::ISA = OpenCL::Device::;
		613
		614	@OpenCL::Buffer::ISA =
		615	@OpenCL::Image::ISA = OpenCL::Memory::;
		616
		617	@OpenCL::BufferObj::ISA = OpenCL::Buffer::;
		618
		619	@OpenCL::Image2D::ISA =
		620	@OpenCL::Image3D::ISA =
		621	@OpenCL::Image2DArray::ISA =
		622	@OpenCL::Image1D::ISA =
		623	@OpenCL::Image1DArray::ISA =
		624	@OpenCL::Image1DBuffer::ISA = OpenCL::Image::;
		625
		626	@OpenCL::UserEvent::ISA = OpenCL::Event::;
		627
		628	@OpenCL::MappedBuffer::ISA =
		629	@OpenCL::MappedImage::ISA = OpenCL::Mapped::;
		630	}
		631
276	=head2 THE OpenCL PACKAGE	632	=head2 THE OpenCL PACKAGE
277		633
278	=over 4	634	=over 4
279		635
280	=item $int = OpenCL::errno	636	=item $int = OpenCL::errno
281		637
282	The last error returned by a function - it's only valid after an error occured	638	The last error returned by a function - it's only valid after an error occured
283	and before calling another OpenCL function.	639	and before calling another OpenCL function.
284		640
285	=item $str = OpenCL::err2str $errval	641	=item $str = OpenCL::err2str [$errval]
286		642
287	Comverts an error value into a human readable string.	643	Converts an error value into a human readable string. IF no error value is
		644	given, then the last error will be used (as returned by OpenCL::errno).
288		645
289	=item $str = OpenCL::enum2str $enum	646	=item $str = OpenCL::enum2str $enum
290		647
291	Converts most enum values (inof parameter names, image format constants,	648	Converts most enum values (of parameter names, image format constants,
292	object types, addressing and filter modes, command types etc.) into a	649	object types, addressing and filter modes, command types etc.) into a
293	human readbale string. When confronted with some random integer it can be	650	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	651	very helpful to pass it through this function to maybe get some readable
295	string out of it.	652	string out of it.
296		653
297	=item @platforms = OpenCL::platforms	654	=item @platforms = OpenCL::platforms
298		655
299	Returns all available OpenCL::Platform objects.	656	Returns all available OpenCL::Platform objects.
300		657
301	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>	658	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>
302		659
303	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef	660	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr
304		661
305	Tries to create a context from a default device and platform - never worked for me.	662	Tries to create a context from a default device and platform type - never worked for me.
		663	Consider using C<< $platform->context_from_type >> instead.
		664
		665	type: OpenCL::DEVICE_TYPE_DEFAULT, OpenCL::DEVICE_TYPE_CPU, OpenCL::DEVICE_TYPE_GPU,
		666	OpenCL::DEVICE_TYPE_ACCELERATOR, OpenCL::DEVICE_TYPE_CUSTOM, OpenCL::DEVICE_TYPE_ALL.
306		667
307	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	668	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
308		669
		670	=item $ctx = OpenCL::context $properties, \@devices, $callback->($err, $pvt) = $print_stderr)
		671
		672	Create a new OpenCL::Context object using the given device object(s).
		673	Consider using C<< $platform->context >> instead.
		674
		675	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
		676
309	=item OpenCL::wait_for_events $wait_events...	677	=item OpenCL::wait_for_events $wait_events...
310		678
311	Waits for all events to complete.	679	Waits for all events to complete.
312		680
313	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	681	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
314		682
		683	=item OpenCL::poll
		684
		685	Checks if there are any outstanding events (see L<EVENT SYSTEM>) and
		686	invokes their callbacks.
		687
		688	=item $OpenCL::INTERRUPT
		689
		690	The L<Async::Interrupt> object used to signal asynchronous events (see
		691	L<EVENT SYSTEM>).
		692
		693	=cut
		694
		695	our $INTERRUPT = new Async::Interrupt c_cb => [$POLL_FUNC, 0];
		696
		697	&_eq_initialise ($INTERRUPT->signal_func);
		698
		699	=item $OpenCL::WATCHER
		700
		701	The L<AnyEvent> watcher object used to watch for asynchronous events (see
		702	L<EVENT SYSTEM>). This variable is C<undef> until L<AnyEvent> has been
		703	loaded I<and> initialised (e.g. by calling C<AnyEvent::detect>).
		704
		705	=cut
		706
		707	our $WATCHER;
		708
		709	sub _init_anyevent {
		710	$INTERRUPT->block;
		711	$WATCHER = AE::io ($INTERRUPT->pipe_fileno, 0, sub { $INTERRUPT->handle });
		712	}
		713
		714	if (defined $AnyEvent::MODEL) {
		715	_init_anyevent;
		716	} else {
		717	push @AnyEvent::post_detect, \&_init_anyevent;
		718	}
		719
315	=back	720	=back
316		721
		722	=head2 THE OpenCL::Object CLASS
		723
		724	This is the base class for all objects in the OpenCL module. The only
		725	method it implements is the C<id> method, which is only useful if you want
		726	to interface to OpenCL on the C level.
		727
		728	=over 4
		729
		730	=item $iv = $obj->id
		731
		732	OpenCL objects are represented by pointers or integers on the C level. If
		733	you want to interface to an OpenCL object directly on the C level, then
		734	you need this value, which is returned by this method. You should use an
		735	C<IV> type in your code and cast that to the correct type.
		736
		737	=cut
		738
		739	sub OpenCL::Object::id {
		740	ref $_[0] eq "SCALAR"
		741	? ${ $_[0] }
		742	: $_[0][0]
		743	}
		744
		745	=back
		746
317	=head2 THE OpenCL::Platform CLASS	747	=head2 THE OpenCL::Platform CLASS
318		748
319	=over 4	749	=over 4
320		750
321	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)	751	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)
322		752
323	Returns a list of matching OpenCL::Device objects.	753	Returns a list of matching OpenCL::Device objects.
324		754
325	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef)	755	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr)
326		756
327	Tries to create a context. Never worked for me, and you need devices explicitly anyway.	757	Tries to create a context. Never worked for me, and you need devices explicitly anyway.
328		758
329	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	759	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
330		760
331	=item $ctx = $device->context ($properties = undef, @$devices, $notify = undef)	761	=item $ctx = $platform->context ($properties, \@devices, $callback->($err, $pvt) = $print_stderr)
332		762
333	Create a new OpenCL::Context object using the given device object(s)- a	763	Create a new OpenCL::Context object using the given device object(s)- a
334	CL_CONTEXT_PLATFORM property is supplied automatically.	764	OpenCL::CONTEXT_PLATFORM property is supplied automatically.
335		765
336	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>	766	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
337		767
338	=item $packed_value = $platform->info ($name)	768	=item $packed_value = $platform->info ($name)
339		769
…		…
344	It's best to avoid this method and use one of the following convenience	774	It's best to avoid this method and use one of the following convenience
345	wrappers.	775	wrappers.
346		776
347	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>	777	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>
348		778
		779	=item $platform->unload_compiler
		780
		781	Attempts to unload the compiler for this platform, for endless
		782	profit. Does nothing on OpenCL 1.1.
		783
		784	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clUnloadPlatformCompiler.html>
		785
349	=for gengetinfo begin platform	786	=for gengetinfo begin platform
350		787
351	=item $string = $platform->profile	788	=item $string = $platform->profile
352		789
353	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_PROFILE> and returns the result.	790	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_PROFILE> and returns the result.
354		791
355	=item $string = $platform->version	792	=item $string = $platform->version
356		793
357	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VERSION> and returns the result.	794	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_VERSION> and returns the result.
358		795
359	=item $string = $platform->name	796	=item $string = $platform->name
360		797
361	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_NAME> and returns the result.	798	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_NAME> and returns the result.
362		799
363	=item $string = $platform->vendor	800	=item $string = $platform->vendor
364		801
365	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VENDOR> and returns the result.	802	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_VENDOR> and returns the result.
366		803
367	=item $string = $platform->extensions	804	=item $string = $platform->extensions
368		805
369	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_EXTENSIONS> and returns the result.	806	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_EXTENSIONS> and returns the result.
370		807
371	=for gengetinfo end platform	808	=for gengetinfo end platform
372		809
373	=back	810	=back
374		811
…		…
378		815
379	=item $packed_value = $device->info ($name)	816	=item $packed_value = $device->info ($name)
380		817
381	See C<< $platform->info >> for details.	818	See C<< $platform->info >> for details.
382		819
		820	type: OpenCL::DEVICE_TYPE_DEFAULT, OpenCL::DEVICE_TYPE_CPU,
		821	OpenCL::DEVICE_TYPE_GPU, OpenCL::DEVICE_TYPE_ACCELERATOR,
		822	OpenCL::DEVICE_TYPE_CUSTOM, OpenCL::DEVICE_TYPE_ALL.
		823
		824	fp_config: OpenCL::FP_DENORM, OpenCL::FP_INF_NAN, OpenCL::FP_ROUND_TO_NEAREST,
		825	OpenCL::FP_ROUND_TO_ZERO, OpenCL::FP_ROUND_TO_INF, OpenCL::FP_FMA,
		826	OpenCL::FP_SOFT_FLOAT, OpenCL::FP_CORRECTLY_ROUNDED_DIVIDE_SQRT.
		827
		828	mem_cache_type: OpenCL::NONE, OpenCL::READ_ONLY_CACHE, OpenCL::READ_WRITE_CACHE.
		829
		830	local_mem_type: OpenCL::LOCAL, OpenCL::GLOBAL.
		831
		832	exec_capabilities: OpenCL::EXEC_KERNEL, OpenCL::EXEC_NATIVE_KERNEL.
		833
		834	command_queue_properties: OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE,
		835	OpenCL::QUEUE_PROFILING_ENABLE.
		836
		837	partition_properties: OpenCL::DEVICE_PARTITION_EQUALLY,
		838	OpenCL::DEVICE_PARTITION_BY_COUNTS, OpenCL::DEVICE_PARTITION_BY_COUNTS_LIST_END,
		839	OpenCL::DEVICE_PARTITION_BY_AFFINITY_DOMAIN.
		840
		841	affinity_domain: OpenCL::DEVICE_AFFINITY_DOMAIN_NUMA,
		842	OpenCL::DEVICE_AFFINITY_DOMAIN_L4_CACHE, OpenCL::DEVICE_AFFINITY_DOMAIN_L3_CACHE,
		843	OpenCL::DEVICE_AFFINITY_DOMAIN_L2_CACHE, OpenCL::DEVICE_AFFINITY_DOMAIN_L1_CACHE,
		844	OpenCL::DEVICE_AFFINITY_DOMAIN_NEXT_PARTITIONABLE.
		845
383	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>	846	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>
384		847
		848	=item @devices = $device->sub_devices (\@properties)
		849
		850	Creates OpencL::SubDevice objects by partitioning an existing device.
		851
		852	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateSubDevices.html>
		853
385	=for gengetinfo begin device	854	=for gengetinfo begin device
386		855
387	=item $device_type = $device->type	856	=item $device_type = $device->type
388		857
389	Calls C<clGetDeviceInfo> with C<CL_DEVICE_TYPE> and returns the result.	858	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_TYPE> and returns the result.
390		859
391	=item $uint = $device->vendor_id	860	=item $uint = $device->vendor_id
392		861
393	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR_ID> and returns the result.	862	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VENDOR_ID> and returns the result.
394		863
395	=item $uint = $device->max_compute_units	864	=item $uint = $device->max_compute_units
396		865
397	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_COMPUTE_UNITS> and returns the result.	866	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_COMPUTE_UNITS> and returns the result.
398		867
399	=item $uint = $device->max_work_item_dimensions	868	=item $uint = $device->max_work_item_dimensions
400		869
401	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result.	870	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result.
402		871
403	=item $int = $device->max_work_group_size	872	=item $int = $device->max_work_group_size
404		873
405	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_GROUP_SIZE> and returns the result.	874	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_GROUP_SIZE> and returns the result.
406		875
407	=item @ints = $device->max_work_item_sizes	876	=item @ints = $device->max_work_item_sizes
408		877
409	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_SIZES> and returns the result.	878	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_ITEM_SIZES> and returns the result.
410		879
411	=item $uint = $device->preferred_vector_width_char	880	=item $uint = $device->preferred_vector_width_char
412		881
413	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result.	882	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result.
414		883
415	=item $uint = $device->preferred_vector_width_short	884	=item $uint = $device->preferred_vector_width_short
416		885
417	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result.	886	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result.
418		887
419	=item $uint = $device->preferred_vector_width_int	888	=item $uint = $device->preferred_vector_width_int
420		889
421	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result.	890	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result.
422		891
423	=item $uint = $device->preferred_vector_width_long	892	=item $uint = $device->preferred_vector_width_long
424		893
425	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result.	894	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result.
426		895
427	=item $uint = $device->preferred_vector_width_float	896	=item $uint = $device->preferred_vector_width_float
428		897
429	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result.	898	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result.
430		899
431	=item $uint = $device->preferred_vector_width_double	900	=item $uint = $device->preferred_vector_width_double
432		901
433	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result.	902	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result.
434		903
435	=item $uint = $device->max_clock_frequency	904	=item $uint = $device->max_clock_frequency
436		905
437	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CLOCK_FREQUENCY> and returns the result.	906	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CLOCK_FREQUENCY> and returns the result.
438		907
439	=item $bitfield = $device->address_bits	908	=item $bitfield = $device->address_bits
440		909
441	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ADDRESS_BITS> and returns the result.	910	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ADDRESS_BITS> and returns the result.
442		911
443	=item $uint = $device->max_read_image_args	912	=item $uint = $device->max_read_image_args
444		913
445	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_READ_IMAGE_ARGS> and returns the result.	914	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_READ_IMAGE_ARGS> and returns the result.
446		915
447	=item $uint = $device->max_write_image_args	916	=item $uint = $device->max_write_image_args
448		917
449	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result.	918	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result.
450		919
451	=item $ulong = $device->max_mem_alloc_size	920	=item $ulong = $device->max_mem_alloc_size
452		921
453	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result.	922	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result.
454		923
455	=item $int = $device->image2d_max_width	924	=item $int = $device->image2d_max_width
456		925
457	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_WIDTH> and returns the result.	926	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE2D_MAX_WIDTH> and returns the result.
458		927
459	=item $int = $device->image2d_max_height	928	=item $int = $device->image2d_max_height
460		929
461	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result.	930	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result.
462		931
463	=item $int = $device->image3d_max_width	932	=item $int = $device->image3d_max_width
464		933
465	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_WIDTH> and returns the result.	934	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_WIDTH> and returns the result.
466		935
467	=item $int = $device->image3d_max_height	936	=item $int = $device->image3d_max_height
468		937
469	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result.	938	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result.
470		939
471	=item $int = $device->image3d_max_depth	940	=item $int = $device->image3d_max_depth
472		941
473	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_DEPTH> and returns the result.	942	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_DEPTH> and returns the result.
474		943
475	=item $uint = $device->image_support	944	=item $uint = $device->image_support
476		945
477	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE_SUPPORT> and returns the result.	946	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE_SUPPORT> and returns the result.
478		947
479	=item $int = $device->max_parameter_size	948	=item $int = $device->max_parameter_size
480		949
481	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_PARAMETER_SIZE> and returns the result.	950	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_PARAMETER_SIZE> and returns the result.
482		951
483	=item $uint = $device->max_samplers	952	=item $uint = $device->max_samplers
484		953
485	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_SAMPLERS> and returns the result.	954	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_SAMPLERS> and returns the result.
486		955
487	=item $uint = $device->mem_base_addr_align	956	=item $uint = $device->mem_base_addr_align
488		957
489	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result.	958	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result.
490		959
491	=item $uint = $device->min_data_type_align_size	960	=item $uint = $device->min_data_type_align_size
492		961
493	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result.	962	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result.
494		963
495	=item $device_fp_config = $device->single_fp_config	964	=item $device_fp_config = $device->single_fp_config
496		965
497	Calls C<clGetDeviceInfo> with C<CL_DEVICE_SINGLE_FP_CONFIG> and returns the result.	966	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_SINGLE_FP_CONFIG> and returns the result.
498		967
499	=item $device_mem_cache_type = $device->global_mem_cache_type	968	=item $device_mem_cache_type = $device->global_mem_cache_type
500		969
501	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result.	970	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result.
502		971
503	=item $uint = $device->global_mem_cacheline_size	972	=item $uint = $device->global_mem_cacheline_size
504		973
505	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result.	974	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result.
506		975
507	=item $ulong = $device->global_mem_cache_size	976	=item $ulong = $device->global_mem_cache_size
508		977
509	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result.	978	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result.
510		979
511	=item $ulong = $device->global_mem_size	980	=item $ulong = $device->global_mem_size
512		981
513	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_SIZE> and returns the result.	982	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_SIZE> and returns the result.
514		983
515	=item $ulong = $device->max_constant_buffer_size	984	=item $ulong = $device->max_constant_buffer_size
516		985
517	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result.	986	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result.
518		987
519	=item $uint = $device->max_constant_args	988	=item $uint = $device->max_constant_args
520		989
521	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_ARGS> and returns the result.	990	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CONSTANT_ARGS> and returns the result.
522		991
523	=item $device_local_mem_type = $device->local_mem_type	992	=item $device_local_mem_type = $device->local_mem_type
524		993
525	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_TYPE> and returns the result.	994	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_LOCAL_MEM_TYPE> and returns the result.
526		995
527	=item $ulong = $device->local_mem_size	996	=item $ulong = $device->local_mem_size
528		997
529	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_SIZE> and returns the result.	998	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_LOCAL_MEM_SIZE> and returns the result.
530		999
531	=item $boolean = $device->error_correction_support	1000	=item $boolean = $device->error_correction_support
532		1001
533	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result.	1002	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result.
534		1003
535	=item $int = $device->profiling_timer_resolution	1004	=item $int = $device->profiling_timer_resolution
536		1005
537	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result.	1006	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result.
538		1007
539	=item $boolean = $device->endian_little	1008	=item $boolean = $device->endian_little
540		1009
541	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ENDIAN_LITTLE> and returns the result.	1010	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ENDIAN_LITTLE> and returns the result.
542		1011
543	=item $boolean = $device->available	1012	=item $boolean = $device->available
544		1013
545	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AVAILABLE> and returns the result.	1014	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_AVAILABLE> and returns the result.
546		1015
547	=item $boolean = $device->compiler_available	1016	=item $boolean = $device->compiler_available
548		1017
549	Calls C<clGetDeviceInfo> with C<CL_DEVICE_COMPILER_AVAILABLE> and returns the result.	1018	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_COMPILER_AVAILABLE> and returns the result.
550		1019
551	=item $device_exec_capabilities = $device->execution_capabilities	1020	=item $device_exec_capabilities = $device->execution_capabilities
552		1021
553	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXECUTION_CAPABILITIES> and returns the result.	1022	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_EXECUTION_CAPABILITIES> and returns the result.
554		1023
555	=item $command_queue_properties = $device->properties	1024	=item $command_queue_properties = $device->properties
556		1025
557	Calls C<clGetDeviceInfo> with C<CL_DEVICE_QUEUE_PROPERTIES> and returns the result.	1026	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_QUEUE_PROPERTIES> and returns the result.
558		1027
559	=item $ = $device->platform	1028	=item $ = $device->platform
560		1029
561	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PLATFORM> and returns the result.	1030	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PLATFORM> and returns the result.
562		1031
563	=item $string = $device->name	1032	=item $string = $device->name
564		1033
565	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NAME> and returns the result.	1034	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NAME> and returns the result.
566		1035
567	=item $string = $device->vendor	1036	=item $string = $device->vendor
568		1037
569	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR> and returns the result.	1038	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VENDOR> and returns the result.
570		1039
571	=item $string = $device->driver_version	1040	=item $string = $device->driver_version
572		1041
573	Calls C<clGetDeviceInfo> with C<CL_DRIVER_VERSION> and returns the result.	1042	Calls C<clGetDeviceInfo> with C<OpenCL::DRIVER_VERSION> and returns the result.
574		1043
575	=item $string = $device->profile	1044	=item $string = $device->profile
576		1045
577	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILE> and returns the result.	1046	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PROFILE> and returns the result.
578		1047
579	=item $string = $device->version	1048	=item $string = $device->version
580		1049
581	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VERSION> and returns the result.	1050	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VERSION> and returns the result.
582		1051
583	=item $string = $device->extensions	1052	=item $string = $device->extensions
584		1053
585	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXTENSIONS> and returns the result.	1054	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_EXTENSIONS> and returns the result.
586		1055
587	=item $uint = $device->preferred_vector_width_half	1056	=item $uint = $device->preferred_vector_width_half
588		1057
589	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result.	1058	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result.
590		1059
591	=item $uint = $device->native_vector_width_char	1060	=item $uint = $device->native_vector_width_char
592		1061
593	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result.	1062	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result.
594		1063
595	=item $uint = $device->native_vector_width_short	1064	=item $uint = $device->native_vector_width_short
596		1065
597	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result.	1066	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result.
598		1067
599	=item $uint = $device->native_vector_width_int	1068	=item $uint = $device->native_vector_width_int
600		1069
601	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result.	1070	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result.
602		1071
603	=item $uint = $device->native_vector_width_long	1072	=item $uint = $device->native_vector_width_long
604		1073
605	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result.	1074	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result.
606		1075
607	=item $uint = $device->native_vector_width_float	1076	=item $uint = $device->native_vector_width_float
608		1077
609	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result.	1078	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result.
610		1079
611	=item $uint = $device->native_vector_width_double	1080	=item $uint = $device->native_vector_width_double
612		1081
613	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result.	1082	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result.
614		1083
615	=item $uint = $device->native_vector_width_half	1084	=item $uint = $device->native_vector_width_half
616		1085
617	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result.	1086	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result.
618		1087
619	=item $device_fp_config = $device->double_fp_config	1088	=item $device_fp_config = $device->double_fp_config
620		1089
621	Calls C<clGetDeviceInfo> with C<CL_DEVICE_DOUBLE_FP_CONFIG> and returns the result.	1090	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_DOUBLE_FP_CONFIG> and returns the result.
622		1091
623	=item $device_fp_config = $device->half_fp_config	1092	=item $device_fp_config = $device->half_fp_config
624		1093
625	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HALF_FP_CONFIG> and returns the result.	1094	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_HALF_FP_CONFIG> and returns the result.
626		1095
627	=item $boolean = $device->host_unified_memory	1096	=item $boolean = $device->host_unified_memory
628		1097
629	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HOST_UNIFIED_MEMORY> and returns the result.	1098	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_HOST_UNIFIED_MEMORY> and returns the result.
630		1099
631	=item $device = $device->parent_device_ext	1100	=item $device = $device->parent_device_ext
632		1101
633	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARENT_DEVICE_EXT> and returns the result.	1102	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARENT_DEVICE_EXT> and returns the result.
634		1103
635	=item @device_partition_property_exts = $device->partition_types_ext	1104	=item @device_partition_property_exts = $device->partition_types_ext
636		1105
637	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_TYPES_EXT> and returns the result.	1106	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARTITION_TYPES_EXT> and returns the result.
638		1107
639	=item @device_partition_property_exts = $device->affinity_domains_ext	1108	=item @device_partition_property_exts = $device->affinity_domains_ext
640		1109
641	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AFFINITY_DOMAINS_EXT> and returns the result.	1110	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_AFFINITY_DOMAINS_EXT> and returns the result.
642		1111
643	=item $uint = $device->reference_count_ext	1112	=item $uint = $device->reference_count_ext
644		1113
645	Calls C<clGetDeviceInfo> with C<CL_DEVICE_REFERENCE_COUNT_EXT > and returns the result.	1114	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_REFERENCE_COUNT_EXT> and returns the result.
646		1115
647	=item @device_partition_property_exts = $device->partition_style_ext	1116	=item @device_partition_property_exts = $device->partition_style_ext
648		1117
649	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_STYLE_EXT> and returns the result.	1118	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARTITION_STYLE_EXT> and returns the result.
650		1119
651	=for gengetinfo end device	1120	=for gengetinfo end device
652		1121
653	=back	1122	=back
654		1123
655	=head2 THE OpenCL::Context CLASS	1124	=head2 THE OpenCL::Context CLASS
656		1125
		1126	An OpenCL::Context is basically a container, or manager, for a number of
		1127	devices of a platform. It is used to create all sorts of secondary objects
		1128	such as buffers, queues, programs and so on.
		1129
		1130	All context creation functions and methods take a list of properties
		1131	(type-value pairs). All property values can be specified as integers -
		1132	some additionally support other types:
		1133
657	=over 4	1134	=over 4
658		1135
		1136	=item OpenCL::CONTEXT_PLATFORM
		1137
		1138	Also accepts OpenCL::Platform objects.
		1139
		1140	=item OpenCL::GLX_DISPLAY_KHR
		1141
		1142	Also accepts C<undef>, in which case a deep and troubling hack is engaged
		1143	to find the current glx display (see L<GLX SUPPORT>).
		1144
		1145	=item OpenCL::GL_CONTEXT_KHR
		1146
		1147	Also accepts C<undef>, in which case a deep and troubling hack is engaged
		1148	to find the current glx context (see L<GLX SUPPORT>).
		1149
		1150	=back
		1151
		1152	=over 4
		1153
		1154	=item $prog = $ctx->build_program ($program, $options = "")
		1155
		1156	This convenience function tries to build the program on all devices in
		1157	the context. If the build fails, then the function will C<croak> with the
		1158	build log. Otherwise ti returns the program object.
		1159
		1160	The C<$program> can either be a C<OpenCL::Program> object or a string
		1161	containing the program. In the latter case, a program objetc will be
		1162	created automatically.
		1163
		1164	=cut
		1165
		1166	sub OpenCL::Context::build_program {
		1167	my ($self, $prog, $options) = @_;
		1168
		1169	$prog = $self->program_with_source ($prog)
		1170	unless ref $prog;
		1171
		1172	eval { $prog->build (undef, $options); 1 }
		1173	or errno == BUILD_PROGRAM_FAILURE
		1174	or errno == INVALID_BINARY # workaround nvidia bug
		1175	or Carp::croak "OpenCL::Context->build_program: " . err2str;
		1176
		1177	# we check status for all devices
		1178	for my $dev ($self->devices) {
		1179	$prog->build_status ($dev) == BUILD_SUCCESS
		1180	or Carp::croak "Building OpenCL program for device '" . $dev->name . "' failed:\n"
		1181	. $prog->build_log ($dev);
		1182	}
		1183
		1184	$prog
		1185	}
		1186
659	=item $queue = $ctx->queue ($device, $properties)	1187	=item $queue = $ctx->queue ($device, $properties)
660		1188
661	Create a new OpenCL::Queue object from the context and the given device.	1189	Create a new OpenCL::Queue object from the context and the given device.
662		1190
663	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>	1191	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>
664		1192
		1193	Example: create an out-of-order queue.
		1194
		1195	$queue = $ctx->queue ($device, OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE);
		1196
665	=item $ev = $ctx->user_event	1197	=item $ev = $ctx->user_event
666		1198
667	Creates a new OpenCL::UserEvent object.	1199	Creates a new OpenCL::UserEvent object.
668		1200
669	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>	1201	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>
670		1202
671	=item $buf = $ctx->buffer ($flags, $len)	1203	=item $buf = $ctx->buffer ($flags, $len)
672		1204
673	Creates a new OpenCL::Buffer object with the given flags and octet-size.	1205	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object with the
		1206	given flags and octet-size.
		1207
		1208	flags: OpenCL::MEM_READ_WRITE, OpenCL::MEM_WRITE_ONLY, OpenCL::MEM_READ_ONLY,
		1209	OpenCL::MEM_USE_HOST_PTR, OpenCL::MEM_ALLOC_HOST_PTR, OpenCL::MEM_COPY_HOST_PTR,
		1210	OpenCL::MEM_HOST_WRITE_ONLY, OpenCL::MEM_HOST_READ_ONLY, OpenCL::MEM_HOST_NO_ACCESS.
674		1211
675	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>	1212	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>
676		1213
677	=item $buf = $ctx->buffer_sv ($flags, $data)	1214	=item $buf = $ctx->buffer_sv ($flags, $data)
678		1215
679	Creates a new OpenCL::Buffer object and initialise it with the given data values.	1216	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object and
		1217	initialise it with the given data values.
		1218
		1219	=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)
		1220
		1221	Creates a new OpenCL::Image object and optionally initialises it with
		1222	the given data values.
		1223
		1224	channel_order: OpenCL::R, OpenCL::A, OpenCL::RG, OpenCL::RA, OpenCL::RGB,
		1225	OpenCL::RGBA, OpenCL::BGRA, OpenCL::ARGB, OpenCL::INTENSITY, OpenCL::LUMINANCE,
		1226	OpenCL::Rx, OpenCL::RGx, OpenCL::RGBx.
		1227
		1228	channel_type: OpenCL::SNORM_INT8, OpenCL::SNORM_INT16, OpenCL::UNORM_INT8,
		1229	OpenCL::UNORM_INT16, OpenCL::UNORM_SHORT_565, OpenCL::UNORM_SHORT_555,
		1230	OpenCL::UNORM_INT_101010, OpenCL::SIGNED_INT8, OpenCL::SIGNED_INT16,
		1231	OpenCL::SIGNED_INT32, OpenCL::UNSIGNED_INT8, OpenCL::UNSIGNED_INT16,
		1232	OpenCL::UNSIGNED_INT32, OpenCL::HALF_FLOAT, OpenCL::FLOAT.
		1233
		1234	type: OpenCL::MEM_OBJECT_BUFFER, OpenCL::MEM_OBJECT_IMAGE2D,
		1235	OpenCL::MEM_OBJECT_IMAGE3D, OpenCL::MEM_OBJECT_IMAGE2D_ARRAY,
		1236	OpenCL::MEM_OBJECT_IMAGE1D, OpenCL::MEM_OBJECT_IMAGE1D_ARRAY,
		1237	OpenCL::MEM_OBJECT_IMAGE1D_BUFFER.
		1238
		1239	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateImage.html>
680		1240
681	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)	1241	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)
682		1242
683	Creates a new OpenCL::Image2D object and optionally initialises it with the given data values.	1243	Creates a new OpenCL::Image2D object and optionally initialises it with
		1244	the given data values.
684		1245
685	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>	1246	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>
686		1247
687	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)	1248	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)
688		1249
689	Creates a new OpenCL::Image3D object and optionally initialises it with the given data values.	1250	Creates a new OpenCL::Image3D object and optionally initialises it with
		1251	the given data values.
690		1252
691	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>	1253	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>
		1254
		1255	=item $buffer = $ctx->gl_buffer ($flags, $bufobj)
		1256
		1257	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object that refers to the given
		1258	OpenGL buffer object.
		1259
		1260	flags: OpenCL::MEM_READ_WRITE, OpenCL::MEM_READ_ONLY, OpenCL::MEM_WRITE_ONLY.
		1261
		1262	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLBuffer.html
		1263
		1264	=item $img = $ctx->gl_texture ($flags, $target, $miplevel, $texture)
		1265
		1266	Creates a new OpenCL::Image object that refers to the given OpenGL
		1267	texture object or buffer.
		1268
		1269	target: GL_TEXTURE_1D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_BUFFER,
		1270	GL_TEXTURE_2D, GL_TEXTURE_2D_ARRAY, GL_TEXTURE_3D,
		1271	GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
		1272	GL_TEXTURE_CUBE_MAP_POSITIVE_Z, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
		1273	GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
		1274	GL_TEXTURE_RECTANGLE/GL_TEXTURE_RECTANGLE_ARB.
		1275
		1276	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateFromGLTexture.html
		1277
		1278	=item $img = $ctx->gl_texture2d ($flags, $target, $miplevel, $texture)
		1279
		1280	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1281	2D texture object.
		1282
		1283	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture2D.html
		1284
		1285	=item $img = $ctx->gl_texture3d ($flags, $target, $miplevel, $texture)
		1286
		1287	Creates a new OpenCL::Image3D object that refers to the given OpenGL
		1288	3D texture object.
		1289
		1290	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture3D.html
		1291
		1292	=item $ctx->gl_renderbuffer ($flags, $renderbuffer)
		1293
		1294	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1295	render buffer.
		1296
		1297	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLRenderbuffer.html
692		1298
693	=item @formats = $ctx->supported_image_formats ($flags, $image_type)	1299	=item @formats = $ctx->supported_image_formats ($flags, $image_type)
694		1300
695	Returns a list of matching image formats - each format is an arrayref with	1301	Returns a list of matching image formats - each format is an arrayref with
696	two values, $channel_order and $channel_type, in it.	1302	two values, $channel_order and $channel_type, in it.
…		…
699		1305
700	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)	1306	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)
701		1307
702	Creates a new OpenCL::Sampler object.	1308	Creates a new OpenCL::Sampler object.
703		1309
		1310	addressing_mode: OpenCL::ADDRESS_NONE, OpenCL::ADDRESS_CLAMP_TO_EDGE,
		1311	OpenCL::ADDRESS_CLAMP, OpenCL::ADDRESS_REPEAT, OpenCL::ADDRESS_MIRRORED_REPEAT.
		1312
		1313	filter_mode: OpenCL::FILTER_NEAREST, OpenCL::FILTER_LINEAR.
		1314
704	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>	1315	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>
705		1316
706	=item $program = $ctx->program_with_source ($string)	1317	=item $program = $ctx->program_with_source ($string)
707		1318
708	Creates a new OpenCL::Program object from the given source code.	1319	Creates a new OpenCL::Program object from the given source code.
709		1320
710	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>	1321	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>
711		1322
		1323	=item ($program, \@status) = $ctx->program_with_binary (\@devices, \@binaries)
		1324
		1325	Creates a new OpenCL::Program object from the given binaries.
		1326
		1327	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithBinary.html>
		1328
		1329	Example: clone an existing program object that contains a successfully
		1330	compiled program, no matter how useless this is.
		1331
		1332	my $clone = $ctx->program_with_binary ([$prog->devices], [$prog->binaries]);
		1333
		1334	=item $program = $ctx->program_with_built_in_kernels (\@devices, $kernel_names)
		1335
		1336	Creates a new OpenCL::Program object from the given built-in kernel names.
		1337
		1338	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateProgramWithBuiltInKernels.html>
		1339
		1340	=item $program = $ctx->link_program (\@devices, $options, \@programs, $cb->($program) = undef)
		1341
		1342	Links all (already compiled) program objects specified in C<@programs>
		1343	together and returns a new OpenCL::Program object with the result.
		1344
		1345	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clLinkProgram.html>
		1346
712	=item $packed_value = $ctx->info ($name)	1347	=item $packed_value = $ctx->info ($name)
713		1348
714	See C<< $platform->info >> for details.	1349	See C<< $platform->info >> for details.
715		1350
716	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>	1351	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>
717		1352
718	=for gengetinfo begin context	1353	=for gengetinfo begin context
719		1354
720	=item $uint = $context->reference_count	1355	=item $uint = $context->reference_count
721		1356
722	Calls C<clGetContextInfo> with C<CL_CONTEXT_REFERENCE_COUNT> and returns the result.	1357	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_REFERENCE_COUNT> and returns the result.
723		1358
724	=item @devices = $context->devices	1359	=item @devices = $context->devices
725		1360
726	Calls C<clGetContextInfo> with C<CL_CONTEXT_DEVICES> and returns the result.	1361	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_DEVICES> and returns the result.
727		1362
728	=item @property_ints = $context->properties	1363	=item @property_ints = $context->properties
729		1364
730	Calls C<clGetContextInfo> with C<CL_CONTEXT_PROPERTIES> and returns the result.	1365	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_PROPERTIES> and returns the result.
731		1366
732	=item $uint = $context->num_devices	1367	=item $uint = $context->num_devices
733		1368
734	Calls C<clGetContextInfo> with C<CL_CONTEXT_NUM_DEVICES> and returns the result.	1369	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_NUM_DEVICES> and returns the result.
735		1370
736	=for gengetinfo end context	1371	=for gengetinfo end context
737		1372
738	=back	1373	=back
739		1374
740	=head2 THE OpenCL::Queue CLASS	1375	=head2 THE OpenCL::Queue CLASS
741		1376
742	An OpenCL::Queue represents an execution queue for OpenCL. You execute	1377	An OpenCL::Queue represents an execution queue for OpenCL. You execute
743	requests by calling their respective C<enqueue_xxx> method and waitinf for	1378	requests by calling their respective method and waiting for it to complete
744	it to complete in some way.	1379	in some way.
745		1380
746	All the enqueue methods return an event object that can be used to wait	1381	Most methods that enqueue some request return an event object that can
747	for completion, unless the method is called in void context, in which case	1382	be used to wait for completion (optionally using a callback), unless
748	no event object is created.	1383	the method is called in void context, in which case no event object is
		1384	created.
749		1385
750	They also allow you to specify any number of other event objects that this	1386	They also allow you to specify any number of other event objects that this
751	request has to wait for before it starts executing, by simply passing the	1387	request has to wait for before it starts executing, by simply passing the
752	event objects as extra parameters to the enqueue methods.	1388	event objects as extra parameters to the enqueue methods. To simplify
		1389	program design, this module ignores any C<undef> values in the list of
		1390	events. This makes it possible to code operations such as this, without
		1391	having to put a valid event object into C<$event> first:
		1392
		1393	$event = $queue->xxx (..., $event);
753		1394
754	Queues execute in-order by default, without any parallelism, so in most	1395	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	1396	cases (i.e. you use only one queue) it's not necessary to wait for or
756	create event objects.	1397	create event objects, althoguh an our of order queue is often a bit
		1398	faster.
757		1399
758	=over 4	1400	=over 4
759		1401
760	=item $ev = $queue->enqueue_read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)	1402	=item $ev = $queue->read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)
761		1403
762	Reads data from buffer into the given string.	1404	Reads data from buffer into the given string.
763		1405
764	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>	1406	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>
765		1407
766	=item $ev = $queue->enqueue_write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)	1408	=item $ev = $queue->write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)
767		1409
768	Writes data to buffer from the given string.	1410	Writes data to buffer from the given string.
769		1411
770	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>	1412	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>
771		1413
772	=item $ev = $queue->enqueue_copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)	1414	=item $ev = $queue->copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)
773		1415
774	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>	1416	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>
775		1417
776	=item $ev = $queue->enqueue_read_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)	1418	=item $ev = $queue->read_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)
777		1419
778	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBufferRect.html	1420	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBufferRect.html
779		1421
780	=item $ev = $queue->enqueue_write_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)	1422	=item $ev = $queue->write_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)
781		1423
782	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBufferRect.html	1424	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBufferRect.html
783		1425
		1426	=item $ev = $queue->copy_buffer_to_image ($src_buffer, $dst_image, $src_offset, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		1427
		1428	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>
		1429
784	=item $ev = $queue->enqueue_read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)	1430	=item $ev = $queue->read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
		1431
		1432	C<$row_pitch> (and C<$slice_pitch>) can be C<0>, in which case the OpenCL
		1433	module uses the image width (and height) to supply default values.
785		1434
786	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>	1435	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>
787		1436
788	=item $ev = $queue->enqueue_write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)	1437	=item $ev = $queue->write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
789		1438
		1439	C<$row_pitch> (and C<$slice_pitch>) can be C<0>, in which case the OpenCL
		1440	module uses the image width (and height) to supply default values.
790	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>	1441	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>
791		1442
		1443	=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...)
		1444
		1445	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>
		1446
		1447	=item $ev = $queue->copy_image_to_buffer ($src_image, $dst_image, $src_x, $src_y, $src_z, $width, $height, $depth, $dst_offset, $wait_events...)
		1448
		1449	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
		1450
792	=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...)	1451	=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...)
793		1452
794	Yeah.	1453	Yeah.
795		1454
796	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
797
798	=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...)
799
800	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.	1455	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.
801		1456
802	=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...)	1457	=item $ev = $queue->fill_buffer ($mem, $pattern, $offset, $size, ...)
803		1458
		1459	Fills the given buffer object with repeated applications of C<$pattern>,
		1460	starting at C<$offset> for C<$size> octets.
		1461
		1462	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillBuffer.html>
		1463
		1464	=item $ev = $queue->fill_image ($img, $r, $g, $b, $a, $x, $y, $z, $width, $height, $depth, ...)
		1465
		1466	Fills the given image area with the given rgba colour components. The
		1467	components are normally floating point values between C<0> and C<1>,
		1468	except when the image channel data type is a signe dor unsigned
		1469	unnormalised format, in which case the range is determined by the format.
		1470
804	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>	1471	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillImage.html>
805		1472
806	=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...)
807
808	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
809
810	=item $ev = $queue->enqueue_task ($kernel, $wait_events...)	1473	=item $ev = $queue->task ($kernel, $wait_events...)
811		1474
812	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>	1475	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>
813		1476
814	=item $ev = $queue->enqueue_nd_range_kernel ($kernel, @$global_work_offset, @$global_work_size, @$local_work_size, $wait_events...)	1477	=item $ev = $queue->nd_range_kernel ($kernel, \@global_work_offset, \@global_work_size, \@local_work_size, $wait_events...)
815		1478
816	Enqueues a kernel execution.	1479	Enqueues a kernel execution.
817		1480
818	@$global_work_size must be specified as a reference to an array of	1481	\@global_work_size must be specified as a reference to an array of
819	integers specifying the work sizes (element counts).	1482	integers specifying the work sizes (element counts).
820		1483
821	@$global_work_offset must be either C<undef> (in which case all offsets	1484	\@global_work_offset must be either C<undef> (in which case all offsets
822	are C<0>), or a reference to an array of work offsets, with the same number	1485	are C<0>), or a reference to an array of work offsets, with the same number
823	of elements as @$global_work_size.	1486	of elements as \@global_work_size.
824		1487
825	@$local_work_size must be either C<undef> (in which case the	1488	\@local_work_size must be either C<undef> (in which case the
826	implementation is supposed to choose good local work sizes), or a	1489	implementation is supposed to choose good local work sizes), or a
827	reference to an array of local work sizes, with the same number of	1490	reference to an array of local work sizes, with the same number of
828	elements as @$global_work_size.	1491	elements as \@global_work_size.
829		1492
830	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>	1493	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>
831		1494
832	=item $ev = $queue->enqueue_marker	1495	=item $ev = $queue->migrate_mem_objects (\@mem_objects, $flags, $wait_events...)
833		1496
		1497	Migrates a number of OpenCL::Memory objects to or from the device.
		1498
		1499	flags: OpenCL::MIGRATE_MEM_OBJECT_HOST, OpenCL::MIGRATE_MEM_OBJECT_CONTENT_UNDEFINED
		1500
		1501	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMigrateMemObjects.html>
		1502
		1503	=item $ev = $queue->acquire_gl_objects ([object, ...], $wait_events...)
		1504
		1505	Enqueues a list (an array-ref of OpenCL::Memory objects) to be acquired
		1506	for subsequent OpenCL usage.
		1507
834	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html>	1508	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueAcquireGLObjects.html>
835		1509
		1510	=item $ev = $queue->release_gl_objects ([object, ...], $wait_events...)
		1511
		1512	Enqueues a list (an array-ref of OpenCL::Memory objects) to be released
		1513	for subsequent OpenGL usage.
		1514
		1515	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReleaseGLObjects.html>
		1516
836	=item $ev = $queue->enqueue_wait_for_events ($wait_events...)	1517	=item $ev = $queue->wait_for_events ($wait_events...)
837		1518
838	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>	1519	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>
839		1520
840	=item $queue->enqueue_barrier	1521	=item $ev = $queue->marker ($wait_events...)
841		1522
		1523	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMarkerWithWaitList.html>
		1524
		1525	=item $ev = $queue->barrier ($wait_events...)
		1526
842	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueBarrier.html>	1527	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueBarrierWithWaitList.html>
843		1528
844	=item $queue->flush	1529	=item $queue->flush
845		1530
846	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>	1531	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>
847		1532
…		…
857		1542
858	=for gengetinfo begin command_queue	1543	=for gengetinfo begin command_queue
859		1544
860	=item $ctx = $command_queue->context	1545	=item $ctx = $command_queue->context
861		1546
862	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_CONTEXT> and returns the result.	1547	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_CONTEXT> and returns the result.
863		1548
864	=item $device = $command_queue->device	1549	=item $device = $command_queue->device
865		1550
866	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_DEVICE> and returns the result.	1551	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_DEVICE> and returns the result.
867		1552
868	=item $uint = $command_queue->reference_count	1553	=item $uint = $command_queue->reference_count
869		1554
870	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_REFERENCE_COUNT> and returns the result.	1555	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_REFERENCE_COUNT> and returns the result.
871		1556
872	=item $command_queue_properties = $command_queue->properties	1557	=item $command_queue_properties = $command_queue->properties
873		1558
874	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_PROPERTIES> and returns the result.	1559	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_PROPERTIES> and returns the result.
875		1560
876	=for gengetinfo end command_queue	1561	=for gengetinfo end command_queue
		1562
		1563	=back
		1564
		1565	=head3 MEMORY MAPPED BUFFERS
		1566
		1567	OpenCL allows you to map buffers and images to host memory (read: perl
		1568	scalars). This is done much like reading or copying a buffer, by enqueuing
		1569	a map or unmap operation on the command queue.
		1570
		1571	The map operations return an C<OpenCL::Mapped> object - see L<THE
		1572	OpenCL::Mapped CLASS> section for details on what to do with these
		1573	objects.
		1574
		1575	The object will be unmapped automatically when the mapped object is
		1576	destroyed (you can use a barrier to make sure the unmap has finished,
		1577	before using the buffer in a kernel), but you can also enqueue an unmap
		1578	operation manually.
		1579
		1580	=over 4
		1581
		1582	=item $mapped_buffer = $queue->map_buffer ($buf, $blocking=1, $map_flags=OpenCL::MAP_READ|OpenCL::MAP_WRITE, $offset=0, $size=undef, $wait_events...)
		1583
		1584	Maps the given buffer into host memory and returns an
		1585	C<OpenCL::MappedBuffer> object. If C<$size> is specified as undef, then
		1586	the map will extend to the end of the buffer.
		1587
		1588	map_flags: OpenCL::MAP_READ, OpenCL::MAP_WRITE, OpenCL::MAP_WRITE_INVALIDATE_REGION.
		1589
		1590	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapBuffer.html>
		1591
		1592	Example: map the buffer $buf fully and replace the first 4 bytes by "abcd", then unmap.
		1593
		1594	{
		1595	my $mapped = $queue->map_buffer ($buf, 1, OpenCL::MAP_WRITE);
		1596	substr $$mapped, 0, 4, "abcd";
		1597	} # asynchronously unmap because $mapped is destroyed
		1598
		1599	=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...)
		1600
		1601	Maps the given image area into host memory and return an
		1602	C<OpenCL::MappedImage> object.
		1603
		1604	If any of C<$width>, C<$height> and/or C<$depth> are C<undef> then they
		1605	will be replaced by the maximum possible value.
		1606
		1607	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapImage.html>
		1608
		1609	Example: map an image (with OpenCL::UNSIGNED_INT8 channel type) and set
		1610	the first channel of the leftmost column to 5, then explicitly unmap
		1611	it. You are not necessarily meant to do it this way, this example just
		1612	shows you the accessors to use :)
		1613
		1614	my $mapped = $queue->map_image ($image, 1, OpenCL::MAP_WRITE);
		1615
		1616	$mapped->set ($_ * $mapped->row_pitch, pack "C", 5)
		1617	for 0..$image->height;
		1618
		1619	$mapped->unmap;.
		1620	$mapped->wait; # only needed for out of order queues normally
		1621
		1622	=item $ev = $queue->unmap ($mapped, $wait_events...)
		1623
		1624	Unmaps the data from host memory. You must not call any methods that
		1625	modify the data, or modify the data scalar directly, after calling this
		1626	method.
		1627
		1628	The mapped event object will always be passed as part of the
		1629	$wait_events. The mapped event object will be replaced by the new event
		1630	object that this request creates.
877		1631
878	=back	1632	=back
879		1633
880	=head2 THE OpenCL::Memory CLASS	1634	=head2 THE OpenCL::Memory CLASS
881		1635
…		…
892		1646
893	=for gengetinfo begin mem	1647	=for gengetinfo begin mem
894		1648
895	=item $mem_object_type = $mem->type	1649	=item $mem_object_type = $mem->type
896		1650
897	Calls C<clGetMemObjectInfo> with C<CL_MEM_TYPE> and returns the result.	1651	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_TYPE> and returns the result.
898		1652
899	=item $mem_flags = $mem->flags	1653	=item $mem_flags = $mem->flags
900		1654
901	Calls C<clGetMemObjectInfo> with C<CL_MEM_FLAGS> and returns the result.	1655	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_FLAGS> and returns the result.
902		1656
903	=item $int = $mem->size	1657	=item $int = $mem->size
904		1658
905	Calls C<clGetMemObjectInfo> with C<CL_MEM_SIZE> and returns the result.	1659	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_SIZE> and returns the result.
906		1660
907	=item $ptr_value = $mem->host_ptr	1661	=item $ptr_value = $mem->host_ptr
908		1662
909	Calls C<clGetMemObjectInfo> with C<CL_MEM_HOST_PTR> and returns the result.	1663	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_HOST_PTR> and returns the result.
910		1664
911	=item $uint = $mem->map_count	1665	=item $uint = $mem->map_count
912		1666
913	Calls C<clGetMemObjectInfo> with C<CL_MEM_MAP_COUNT> and returns the result.	1667	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_MAP_COUNT> and returns the result.
914		1668
915	=item $uint = $mem->reference_count	1669	=item $uint = $mem->reference_count
916		1670
917	Calls C<clGetMemObjectInfo> with C<CL_MEM_REFERENCE_COUNT> and returns the result.	1671	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_REFERENCE_COUNT> and returns the result.
918		1672
919	=item $ctx = $mem->context	1673	=item $ctx = $mem->context
920		1674
921	Calls C<clGetMemObjectInfo> with C<CL_MEM_CONTEXT> and returns the result.	1675	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_CONTEXT> and returns the result.
922		1676
923	=item $mem = $mem->associated_memobject	1677	=item $mem = $mem->associated_memobject
924		1678
925	Calls C<clGetMemObjectInfo> with C<CL_MEM_ASSOCIATED_MEMOBJECT> and returns the result.	1679	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_ASSOCIATED_MEMOBJECT> and returns the result.
926		1680
927	=item $int = $mem->offset	1681	=item $int = $mem->offset
928		1682
929	Calls C<clGetMemObjectInfo> with C<CL_MEM_OFFSET> and returns the result.	1683	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_OFFSET> and returns the result.
930		1684
931	=for gengetinfo end mem	1685	=for gengetinfo end mem
932		1686
		1687	=item ($type, $name) = $mem->gl_object_info
		1688
		1689	Returns the OpenGL object type (e.g. OpenCL::GL_OBJECT_TEXTURE2D) and the
		1690	object "name" (e.g. the texture name) used to create this memory object.
		1691
		1692	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetGLObjectInfo.html>
		1693
933	=back	1694	=back
934		1695
		1696	=head2 THE OpenCL::Buffer CLASS
		1697
		1698	This is a subclass of OpenCL::Memory, and the superclass of
		1699	OpenCL::BufferObj. Its purpose is simply to distinguish between buffers
		1700	and sub-buffers.
		1701
		1702	=head2 THE OpenCL::BufferObj CLASS
		1703
		1704	This is a subclass of OpenCL::Buffer and thus OpenCL::Memory. It exists
		1705	because one cna create sub buffers of OpenLC::BufferObj objects, but not
		1706	sub buffers from these sub buffers.
		1707
		1708	=over 4
		1709
		1710	=item $subbuf = $buf_obj->sub_buffer_region ($flags, $origin, $size)
		1711
		1712	Creates an OpenCL::Buffer objects from this buffer and returns it. The
		1713	C<buffer_create_type> is assumed to be C<OpenCL::BUFFER_CREATE_TYPE_REGION>.
		1714
		1715	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSubBuffer.html>
		1716
		1717	=back
		1718
935	=head2 THE OpenCL::Image CLASS	1719	=head2 THE OpenCL::Image CLASS
936		1720
937	This is the superclass of all image objects - OpenCL::Image2D and OpenCL::Image3D.	1721	This is the superclass of all image objects - OpenCL::Image1D,
		1722	OpenCL::Image1DArray, OpenCL::Image1DBuffer, OpenCL::Image2D,
		1723	OpenCL::Image2DArray and OpenCL::Image3D.
938		1724
939	=over 4	1725	=over 4
940		1726
941	=item $packed_value = $ev->image_info ($name)	1727	=item $packed_value = $image->image_info ($name)
942		1728
943	See C<< $platform->info >> for details.	1729	See C<< $platform->info >> for details.
944		1730
945	The reason this method is not called C<info> is that there already is an	1731	The reason this method is not called C<info> is that there already is an
946	C<< ->info >> method inherited from C<OpenCL::Memory>.	1732	C<< ->info >> method inherited from C<OpenCL::Memory>.
947		1733
948	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>	1734	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>
949		1735
		1736	=item ($channel_order, $channel_data_type) = $image->format
		1737
		1738	Returns the channel order and type used to create the image by calling
		1739	C<clGetImageInfo> with C<OpenCL::IMAGE_FORMAT>.
		1740
950	=for gengetinfo begin image	1741	=for gengetinfo begin image
951		1742
952	=item $int = $image->element_size	1743	=item $int = $image->element_size
953		1744
954	Calls C<clGetImageInfo> with C<CL_IMAGE_ELEMENT_SIZE> and returns the result.	1745	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_ELEMENT_SIZE> and returns the result.
955		1746
956	=item $int = $image->row_pitch	1747	=item $int = $image->row_pitch
957		1748
958	Calls C<clGetImageInfo> with C<CL_IMAGE_ROW_PITCH> and returns the result.	1749	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_ROW_PITCH> and returns the result.
959		1750
960	=item $int = $image->slice_pitch	1751	=item $int = $image->slice_pitch
961		1752
962	Calls C<clGetImageInfo> with C<CL_IMAGE_SLICE_PITCH> and returns the result.	1753	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_SLICE_PITCH> and returns the result.
963		1754
964	=item $int = $image->width	1755	=item $int = $image->width
965		1756
966	Calls C<clGetImageInfo> with C<CL_IMAGE_WIDTH> and returns the result.	1757	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_WIDTH> and returns the result.
967		1758
968	=item $int = $image->height	1759	=item $int = $image->height
969		1760
970	Calls C<clGetImageInfo> with C<CL_IMAGE_HEIGHT> and returns the result.	1761	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_HEIGHT> and returns the result.
971		1762
972	=item $int = $image->depth	1763	=item $int = $image->depth
973		1764
974	Calls C<clGetImageInfo> with C<CL_IMAGE_DEPTH> and returns the result.	1765	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_DEPTH> and returns the result.
975		1766
976	=for gengetinfo end image	1767	=for gengetinfo end image
977		1768
		1769	=for gengetinfo begin gl_texture
		1770
		1771	=item $GLenum = $gl_texture->target
		1772
		1773	Calls C<clGetGLTextureInfo> with C<OpenCL::GL_TEXTURE_TARGET> and returns the result.
		1774
		1775	=item $GLint = $gl_texture->gl_mipmap_level
		1776
		1777	Calls C<clGetGLTextureInfo> with C<OpenCL::GL_MIPMAP_LEVEL> and returns the result.
		1778
		1779	=for gengetinfo end gl_texture
		1780
978	=back	1781	=back
979		1782
980	=head2 THE OpenCL::Sampler CLASS	1783	=head2 THE OpenCL::Sampler CLASS
981		1784
982	=over 4	1785	=over 4
…		…
989		1792
990	=for gengetinfo begin sampler	1793	=for gengetinfo begin sampler
991		1794
992	=item $uint = $sampler->reference_count	1795	=item $uint = $sampler->reference_count
993		1796
994	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_REFERENCE_COUNT> and returns the result.	1797	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_REFERENCE_COUNT> and returns the result.
995		1798
996	=item $ctx = $sampler->context	1799	=item $ctx = $sampler->context
997		1800
998	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_CONTEXT> and returns the result.	1801	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_CONTEXT> and returns the result.
999		1802
1000	=item $addressing_mode = $sampler->normalized_coords	1803	=item $addressing_mode = $sampler->normalized_coords
1001		1804
1002	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_NORMALIZED_COORDS> and returns the result.	1805	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_NORMALIZED_COORDS> and returns the result.
1003		1806
1004	=item $filter_mode = $sampler->addressing_mode	1807	=item $filter_mode = $sampler->addressing_mode
1005		1808
1006	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_ADDRESSING_MODE> and returns the result.	1809	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_ADDRESSING_MODE> and returns the result.
1007		1810
1008	=item $boolean = $sampler->filter_mode	1811	=item $boolean = $sampler->filter_mode
1009		1812
1010	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_FILTER_MODE> and returns the result.	1813	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_FILTER_MODE> and returns the result.
1011		1814
1012	=for gengetinfo end sampler	1815	=for gengetinfo end sampler
1013		1816
1014	=back	1817	=back
1015		1818
1016	=head2 THE OpenCL::Program CLASS	1819	=head2 THE OpenCL::Program CLASS
1017		1820
1018	=over 4	1821	=over 4
1019		1822
1020	=item $program->build ($device, $options = "")	1823	=item $program->build (\@devices = undef, $options = "", $cb->($program) = undef)
1021		1824
1022	Tries to build the program with the givne options.	1825	Tries to build the program with the given options. See also the
		1826	C<$ctx->build> convenience function.
		1827
		1828	If a callback is specified, then it will be called when compilation is
		1829	finished. Note that many OpenCL implementations block your program while
		1830	compiling whether you use a callback or not. See C<build_async> if you
		1831	want to make sure the build is done in the background.
		1832
		1833	Note that some OpenCL implementations act up badly, and don't call the
		1834	callback in some error cases (but call it in others). This implementation
		1835	assumes the callback will always be called, and leaks memory if this is
		1836	not so. So best make sure you don't pass in invalid values.
		1837
		1838	Some implementations fail with C<OpenCL::INVALID_BINARY> when the
		1839	compilation state is successful but some later stage fails.
		1840
		1841	options: C<-D name>, C<-D name=definition>, C<-I dir>,
		1842	C<-cl-single-precision-constant>, C<-cl-denorms-are-zero>,
		1843	C<-cl-fp32-correctly-rounded-divide-sqrt>, C<-cl-opt-disable>,
		1844	C<-cl-mad-enable>, C<-cl-no-signed-zeros>, C<-cl-unsafe-math-optimizations>,
		1845	C<-cl-finite-math-only>, C<-cl-fast-relaxed-math>,
		1846	C<-w>, C<-Werror>, C<-cl-std=CL1.1/CL1.2>, C<-cl-kernel-arg-info>,
		1847	C<-create-library>, C<-enable-link-options>.
		1848
		1849	build_status: OpenCL::BUILD_SUCCESS, OpenCL::BUILD_NONE,
		1850	OpenCL::BUILD_ERROR, OpenCL::BUILD_IN_PROGRESS.
1023		1851
1024	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>	1852	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>
		1853
		1854	=item $program->build_async (\@devices = undef, $options = "", $cb->($program) = undef)
		1855
		1856	Similar to C<< ->build >>, except it starts a thread, and never fails (you
		1857	need to check the compilation status form the callback, or by polling).
		1858
		1859	=item $program->compile (\@devices = undef, $options = "", \%headers = undef, $cb->($program) = undef)
		1860
		1861	Compiles the given program for the given devices (or all devices if
		1862	undef). If C<$headers> is given, it must be a hashref with include name =>
		1863	OpenCL::Program pairs.
		1864
		1865	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCompileProgram.html>
1025		1866
1026	=item $packed_value = $program->build_info ($device, $name)	1867	=item $packed_value = $program->build_info ($device, $name)
1027		1868
1028	Similar to C<< $platform->info >>, but returns build info for a previous	1869	Similar to C<< $platform->info >>, but returns build info for a previous
1029	build attempt for the given device.	1870	build attempt for the given device.
1030		1871
		1872	binary_type: OpenCL::PROGRAM_BINARY_TYPE_NONE,
		1873	OpenCL::PROGRAM_BINARY_TYPE_COMPILED_OBJECT,
		1874	OpenCL::PROGRAM_BINARY_TYPE_LIBRARY,
		1875	OpenCL::PROGRAM_BINARY_TYPE_EXECUTABLE.
		1876
1031	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetBuildInfo.html>	1877	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetBuildInfo.html>
1032		1878
1033	=item $kernel = $program->kernel ($function_name)	1879	=item $kernel = $program->kernel ($function_name)
1034		1880
1035	Creates an OpenCL::Kernel object out of the named C<__kernel> function in	1881	Creates an OpenCL::Kernel object out of the named C<__kernel> function in
1036	the program.	1882	the program.
1037		1883
1038	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>	1884	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>
1039		1885
		1886	=item @kernels = $program->kernels_in_program
		1887
		1888	Returns all kernels successfully compiled for all devices in program.
		1889
		1890	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernelsInProgram.html
		1891
1040	=for gengetinfo begin program_build	1892	=for gengetinfo begin program_build
1041		1893
1042	=item $build_status = $program->build_status ($device)	1894	=item $build_status = $program->build_status ($device)
1043		1895
1044	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_STATUS> and returns the result.	1896	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_STATUS> and returns the result.
1045		1897
1046	=item $string = $program->build_options ($device)	1898	=item $string = $program->build_options ($device)
1047		1899
1048	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_OPTIONS> and returns the result.	1900	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_OPTIONS> and returns the result.
1049		1901
1050	=item $string = $program->build_log ($device)	1902	=item $string = $program->build_log ($device)
1051		1903
1052	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_LOG> and returns the result.	1904	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_LOG> and returns the result.
		1905
		1906	=item $binary_type = $program->binary_type ($device)
		1907
		1908	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BINARY_TYPE> and returns the result.
1053		1909
1054	=for gengetinfo end program_build	1910	=for gengetinfo end program_build
1055		1911
1056	=item $packed_value = $program->info ($name)	1912	=item $packed_value = $program->info ($name)
1057		1913
…		…
1061		1917
1062	=for gengetinfo begin program	1918	=for gengetinfo begin program
1063		1919
1064	=item $uint = $program->reference_count	1920	=item $uint = $program->reference_count
1065		1921
1066	Calls C<clGetProgramInfo> with C<CL_PROGRAM_REFERENCE_COUNT> and returns the result.	1922	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_REFERENCE_COUNT> and returns the result.
1067		1923
1068	=item $ctx = $program->context	1924	=item $ctx = $program->context
1069		1925
1070	Calls C<clGetProgramInfo> with C<CL_PROGRAM_CONTEXT> and returns the result.	1926	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_CONTEXT> and returns the result.
1071		1927
1072	=item $uint = $program->num_devices	1928	=item $uint = $program->num_devices
1073		1929
1074	Calls C<clGetProgramInfo> with C<CL_PROGRAM_NUM_DEVICES> and returns the result.	1930	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_NUM_DEVICES> and returns the result.
1075		1931
1076	=item @devices = $program->devices	1932	=item @devices = $program->devices
1077		1933
1078	Calls C<clGetProgramInfo> with C<CL_PROGRAM_DEVICES> and returns the result.	1934	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_DEVICES> and returns the result.
1079		1935
1080	=item $string = $program->source	1936	=item $string = $program->source
1081		1937
1082	Calls C<clGetProgramInfo> with C<CL_PROGRAM_SOURCE> and returns the result.	1938	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_SOURCE> and returns the result.
1083		1939
1084	=item @ints = $program->binary_sizes	1940	=item @ints = $program->binary_sizes
1085		1941
1086	Calls C<clGetProgramInfo> with C<CL_PROGRAM_BINARY_SIZES> and returns the result.	1942	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_BINARY_SIZES> and returns the result.
1087		1943
1088	=for gengetinfo end program	1944	=for gengetinfo end program
1089		1945
1090	=item @blobs = $program->binaries	1946	=item @blobs = $program->binaries
1091		1947
…		…
1112		1968
1113	=for gengetinfo begin kernel	1969	=for gengetinfo begin kernel
1114		1970
1115	=item $string = $kernel->function_name	1971	=item $string = $kernel->function_name
1116		1972
1117	Calls C<clGetKernelInfo> with C<CL_KERNEL_FUNCTION_NAME> and returns the result.	1973	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_FUNCTION_NAME> and returns the result.
1118		1974
1119	=item $uint = $kernel->num_args	1975	=item $uint = $kernel->num_args
1120		1976
1121	Calls C<clGetKernelInfo> with C<CL_KERNEL_NUM_ARGS> and returns the result.	1977	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_NUM_ARGS> and returns the result.
1122		1978
1123	=item $uint = $kernel->reference_count	1979	=item $uint = $kernel->reference_count
1124		1980
1125	Calls C<clGetKernelInfo> with C<CL_KERNEL_REFERENCE_COUNT> and returns the result.	1981	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_REFERENCE_COUNT> and returns the result.
1126		1982
1127	=item $ctx = $kernel->context	1983	=item $ctx = $kernel->context
1128		1984
1129	Calls C<clGetKernelInfo> with C<CL_KERNEL_CONTEXT> and returns the result.	1985	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_CONTEXT> and returns the result.
1130		1986
1131	=item $program = $kernel->program	1987	=item $program = $kernel->program
1132		1988
1133	Calls C<clGetKernelInfo> with C<CL_KERNEL_PROGRAM> and returns the result.	1989	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_PROGRAM> and returns the result.
1134		1990
1135	=for gengetinfo end kernel	1991	=for gengetinfo end kernel
1136		1992
1137	=item $packed_value = $kernel->work_group_info ($device, $name)	1993	=item $packed_value = $kernel->work_group_info ($device, $name)
		1994
		1995	See C<< $platform->info >> for details.
		1996
		1997	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
		1998
		1999	=for gengetinfo begin kernel_work_group
		2000
		2001	=item $int = $kernel->work_group_size ($device)
		2002
		2003	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_WORK_GROUP_SIZE> and returns the result.
		2004
		2005	=item @ints = $kernel->compile_work_group_size ($device)
		2006
		2007	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result.
		2008
		2009	=item $ulong = $kernel->local_mem_size ($device)
		2010
		2011	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_LOCAL_MEM_SIZE> and returns the result.
		2012
		2013	=item $int = $kernel->preferred_work_group_size_multiple ($device)
		2014
		2015	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result.
		2016
		2017	=item $ulong = $kernel->private_mem_size ($device)
		2018
		2019	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_PRIVATE_MEM_SIZE> and returns the result.
		2020
		2021	=for gengetinfo end kernel_work_group
		2022
		2023	=item $packed_value = $kernel->arg_info ($idx, $name)
		2024
		2025	See C<< $platform->info >> for details.
		2026
		2027	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clGetKernelArgInfo.html>
		2028
		2029	=for gengetinfo begin kernel_arg
		2030
		2031	=item $kernel_arg_address_qualifier = $kernel->arg_address_qualifier ($idx)
		2032
		2033	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_ADDRESS_QUALIFIER> and returns the result.
		2034
		2035	=item $kernel_arg_access_qualifier = $kernel->arg_access_qualifier ($idx)
		2036
		2037	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_ACCESS_QUALIFIER> and returns the result.
		2038
		2039	=item $string = $kernel->arg_type_name ($idx)
		2040
		2041	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_TYPE_NAME> and returns the result.
		2042
		2043	=item $kernel_arg_type_qualifier = $kernel->arg_type_qualifier ($idx)
		2044
		2045	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_TYPE_QUALIFIER> and returns the result.
		2046
		2047	=item $string = $kernel->arg_name ($idx)
		2048
		2049	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_NAME> and returns the result.
		2050
		2051	=for gengetinfo end kernel_arg
		2052
		2053	=item $kernel->setf ($format, ...)
		2054
		2055	Sets the arguments of a kernel. Since OpenCL 1.1 doesn't have a generic
		2056	way to set arguments (and with OpenCL 1.2 it might be rather slow), you
		2057	need to specify a format argument, much as with C<printf>, to tell OpenCL
		2058	what type of argument it is.
		2059
		2060	The format arguments are single letters:
		2061
		2062	c char
		2063	C unsigned char
		2064	s short
		2065	S unsigned short
		2066	i int
		2067	I unsigned int
		2068	l long
		2069	L unsigned long
		2070
		2071	h half float (0..65535)
		2072	f float
		2073	d double
		2074
		2075	z local (octet size)
		2076
		2077	m memory object (buffer or image)
		2078	a sampler
		2079	e event
		2080
		2081	Space characters in the format string are ignored.
		2082
		2083	Example: set the arguments for a kernel that expects an int, two floats, a buffer and an image.
		2084
		2085	$kernel->setf ("i ff mm", 5, 0.5, 3, $buffer, $image);
		2086
		2087	=item $kernel->set_TYPE ($index, $value)
		2088
		2089	=item $kernel->set_char ($index, $value)
		2090
		2091	=item $kernel->set_uchar ($index, $value)
		2092
		2093	=item $kernel->set_short ($index, $value)
		2094
		2095	=item $kernel->set_ushort ($index, $value)
		2096
		2097	=item $kernel->set_int ($index, $value)
		2098
		2099	=item $kernel->set_uint ($index, $value)
		2100
		2101	=item $kernel->set_long ($index, $value)
		2102
		2103	=item $kernel->set_ulong ($index, $value)
		2104
		2105	=item $kernel->set_half ($index, $value)
		2106
		2107	=item $kernel->set_float ($index, $value)
		2108
		2109	=item $kernel->set_double ($index, $value)
		2110
		2111	=item $kernel->set_memory ($index, $value)
		2112
		2113	=item $kernel->set_buffer ($index, $value)
		2114
		2115	=item $kernel->set_image ($index, $value)
		2116
		2117	=item $kernel->set_sampler ($index, $value)
		2118
		2119	=item $kernel->set_local ($index, $value)
		2120
		2121	=item $kernel->set_event ($index, $value)
		2122
		2123	This is a family of methods to set the kernel argument with the number
		2124	C<$index> to the give C<$value>.
		2125
		2126	Chars and integers (including the half type) are specified as integers,
		2127	float and double as floating point values, memory/buffer/image must be
		2128	an object of that type or C<undef>, local-memory arguments are set by
		2129	specifying the size, and sampler and event must be objects of that type.
		2130
		2131	Note that C<set_memory> works for all memory objects (all types of buffers
		2132	and images) - the main purpose of the more specific C<set_TYPE> functions
		2133	is type checking.
		2134
		2135	Setting an argument for a kernel does NOT keep a reference to the object -
		2136	for example, if you set an argument to some image object, free the image,
		2137	and call the kernel, you will run into undefined behaviour.
		2138
		2139	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>
		2140
		2141	=back
		2142
		2143	=head2 THE OpenCL::Event CLASS
		2144
		2145	This is the superclass for all event objects (including OpenCL::UserEvent
		2146	objects).
		2147
		2148	=over 4
		2149
		2150	=item $ev->wait
		2151
		2152	Waits for the event to complete.
		2153
		2154	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
		2155
		2156	=item $ev->cb ($exec_callback_type, $callback->($event, $event_command_exec_status))
		2157
		2158	Adds a callback to the callback stack for the given event type. There is
		2159	no way to remove a callback again.
		2160
		2161	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetEventCallback.html>
		2162
		2163	=item $packed_value = $ev->info ($name)
		2164
		2165	See C<< $platform->info >> for details.
		2166
		2167	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
		2168
		2169	=for gengetinfo begin event
		2170
		2171	=item $queue = $event->command_queue
		2172
		2173	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_QUEUE> and returns the result.
		2174
		2175	=item $command_type = $event->command_type
		2176
		2177	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_TYPE> and returns the result.
		2178
		2179	=item $uint = $event->reference_count
		2180
		2181	Calls C<clGetEventInfo> with C<OpenCL::EVENT_REFERENCE_COUNT> and returns the result.
		2182
		2183	=item $uint = $event->command_execution_status
		2184
		2185	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_EXECUTION_STATUS> and returns the result.
		2186
		2187	=item $ctx = $event->context
		2188
		2189	Calls C<clGetEventInfo> with C<OpenCL::EVENT_CONTEXT> and returns the result.
		2190
		2191	=for gengetinfo end event
		2192
		2193	=item $packed_value = $ev->profiling_info ($name)
1138		2194
1139	See C<< $platform->info >> for details.	2195	See C<< $platform->info >> for details.
1140		2196
1141	The reason this method is not called C<info> is that there already is an	2197	The reason this method is not called C<info> is that there already is an
1142	C<< ->info >> method.	2198	C<< ->info >> method.
1143		2199
1144	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
1145
1146	=for gengetinfo begin kernel_work_group
1147
1148	=item $int = $kernel->work_group_size ($device)
1149
1150	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_WORK_GROUP_SIZE> and returns the result.
1151
1152	=item @ints = $kernel->compile_work_group_size ($device)
1153
1154	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result.
1155
1156	=item $ulong = $kernel->local_mem_size ($device)
1157
1158	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_LOCAL_MEM_SIZE> and returns the result.
1159
1160	=item $int = $kernel->preferred_work_group_size_multiple ($device)
1161
1162	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result.
1163
1164	=item $ulong = $kernel->private_mem_size ($device)
1165
1166	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PRIVATE_MEM_SIZE> and returns the result.
1167
1168	=for gengetinfo end kernel_work_group
1169
1170	=item $kernel->set_TYPE ($index, $value)
1171
1172	This is a family of methods to set the kernel argument with the number C<$index> to the give C<$value>.
1173
1174	TYPE is one of C<char>, C<uchar>, C<short>, C<ushort>, C<int>, C<uint>,
1175	C<long>, C<ulong>, C<half>, C<float>, C<double>, C<memory>, C<buffer>,
1176	C<image2d>, C<image3d>, C<sampler> or C<event>.
1177
1178	Chars and integers (including the half type) are specified as integers,
1179	float and double as floating point values, memory/buffer/image2d/image3d
1180	must be an object of that type or C<undef>, and sampler and event must be
1181	objects of that type.
1182
1183	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>	2200	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
		2201
		2202	=for gengetinfo begin profiling
		2203
		2204	=item $ulong = $event->profiling_command_queued
		2205
		2206	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_QUEUED> and returns the result.
		2207
		2208	=item $ulong = $event->profiling_command_submit
		2209
		2210	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_SUBMIT> and returns the result.
		2211
		2212	=item $ulong = $event->profiling_command_start
		2213
		2214	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_START> and returns the result.
		2215
		2216	=item $ulong = $event->profiling_command_end
		2217
		2218	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_END> and returns the result.
		2219
		2220	=for gengetinfo end profiling
1184		2221
1185	=back	2222	=back
1186		2223
1187	=head2 THE OpenCL::Event CLASS	2224	=head2 THE OpenCL::UserEvent CLASS
1188		2225
1189	This is the superclass for all event objects (including OpenCL::UserEvent	2226	This is a subclass of OpenCL::Event.
1190	objects).
1191		2227
1192	=over 4	2228	=over 4
1193		2229
1194	=item $ev->wait	2230	=item $ev->set_status ($execution_status)
1195		2231
1196	Waits for the event to complete.	2232	Sets the execution status of the user event. Can only be called once,
		2233	either with OpenCL::COMPLETE or a negative number as status.
1197		2234
		2235	execution_status: OpenCL::COMPLETE or a negative integer.
		2236
1198	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	2237	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>
1199
1200	=item $packed_value = $ev->info ($name)
1201
1202	See C<< $platform->info >> for details.
1203
1204	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
1205
1206	=for gengetinfo begin event
1207
1208	=item $queue = $event->command_queue
1209
1210	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_QUEUE> and returns the result.
1211
1212	=item $command_type = $event->command_type
1213
1214	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_TYPE> and returns the result.
1215
1216	=item $uint = $event->reference_count
1217
1218	Calls C<clGetEventInfo> with C<CL_EVENT_REFERENCE_COUNT> and returns the result.
1219
1220	=item $uint = $event->command_execution_status
1221
1222	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_EXECUTION_STATUS> and returns the result.
1223
1224	=item $ctx = $event->context
1225
1226	Calls C<clGetEventInfo> with C<CL_EVENT_CONTEXT> and returns the result.
1227
1228	=for gengetinfo end event
1229
1230	=item $packed_value = $ev->profiling_info ($name)
1231
1232	See C<< $platform->info >> for details.
1233
1234	The reason this method is not called C<info> is that there already is an
1235	C<< ->info >> method.
1236
1237	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
1238
1239	=for gengetinfo begin profiling
1240
1241	=item $ulong = $event->profiling_command_queued
1242
1243	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_QUEUED> and returns the result.
1244
1245	=item $ulong = $event->profiling_command_submit
1246
1247	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_SUBMIT> and returns the result.
1248
1249	=item $ulong = $event->profiling_command_start
1250
1251	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_START> and returns the result.
1252
1253	=item $ulong = $event->profiling_command_end
1254
1255	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_END> and returns the result.
1256
1257	=for gengetinfo end profiling
1258		2238
1259	=back	2239	=back
1260		2240
1261	=head2 THE OpenCL::UserEvent CLASS	2241	=head2 THE OpenCL::Mapped CLASS
1262		2242
1263	This is a subclass of OpenCL::Event.	2243	This class represents objects mapped into host memory. They are
		2244	represented by a blessed string scalar. The string data is the mapped
		2245	memory area, that is, if you read or write it, then the mapped object is
		2246	accessed directly.
		2247
		2248	You must only ever use operations that modify the string in-place - for
		2249	example, a C<substr> that doesn't change the length, or maybe a regex that
		2250	doesn't change the length. Any other operation might cause the data to be
		2251	copied.
		2252
		2253	When the object is destroyed it will enqueue an implicit unmap operation
		2254	on the queue that was used to create it.
		2255
		2256	Keep in mind that you I<need> to unmap (or destroy) mapped objects before
		2257	OpenCL sees the changes, even if some implementations don't need this
		2258	sometimes.
		2259
		2260	Example, replace the first two floats in the mapped buffer by 1 and 2.
		2261
		2262	my $mapped = $queue->map_buffer ($buf, ...
		2263	$mapped->event->wait; # make sure it's there
		2264
		2265	# now replace first 8 bytes by new data, which is exactly 8 bytes long
		2266	# we blindly assume device endianness to equal host endianness
		2267	# (and of course, we assume iee 754 single precision floats :)
		2268	substr $$mapped, 0, 8, pack "f*", 1, 2;
1264		2269
1265	=over 4	2270	=over 4
1266		2271
1267	=item $ev->set_status ($execution_status)	2272	=item $ev = $mapped->unmap ($wait_events...)
1268		2273
1269	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>	2274	Unmaps the mapped memory object, using the queue originally used to create
		2275	it, quite similarly to C<< $queue->unmap ($mapped, ...) >>.
		2276
		2277	=item $bool = $mapped->mapped
		2278
		2279	Returns whether the object is still mapped - true before an C<unmap> is
		2280	enqueued, false afterwards.
		2281
		2282	=item $ev = $mapped->event
		2283
		2284	Return the event object associated with the mapped object. Initially, this
		2285	will be the event object created when mapping the object, and after an
		2286	unmap, this will be the event object that the unmap operation created.
		2287
		2288	=item $mapped->wait
		2289
		2290	Same as C<< $mapped->event->wait >> - makes sure no operations on this
		2291	mapped object are outstanding.
		2292
		2293	=item $bytes = $mapped->size
		2294
		2295	Returns the size of the mapped area, in bytes. Same as C<length $$mapped>.
		2296
		2297	=item $ptr = $mapped->ptr
		2298
		2299	Returns the raw memory address of the mapped area.
		2300
		2301	=item $mapped->set ($offset, $data)
		2302
		2303	Replaces the data at the given C<$offset> in the memory area by the new
		2304	C<$data>. This method is safer than direct manipulation of C<$mapped>
		2305	because it does bounds-checking, but also slower.
		2306
		2307	=item $data = $mapped->get ($offset, $length)
		2308
		2309	Returns (without copying) a scalar representing the data at the given
		2310	C<$offset> and C<$length> in the mapped memory area. This is the same as
		2311	the following substr, except much slower;
		2312
		2313	$data = substr $$mapped, $offset, $length
		2314
		2315	=cut
		2316
		2317	sub OpenCL::Mapped::get {
		2318	substr ${$_[0]}, $_[1], $_[2]
		2319	}
1270		2320
1271	=back	2321	=back
1272		2322
		2323	=head2 THE OpenCL::MappedBuffer CLASS
		2324
		2325	This is a subclass of OpenCL::Mapped, representing mapped buffers.
		2326
		2327	=head2 THE OpenCL::MappedImage CLASS
		2328
		2329	This is a subclass of OpenCL::Mapped, representing mapped images.
		2330
		2331	=over 4
		2332
		2333	=item $bytes = $mapped->row_pitch
		2334
		2335	=item $bytes = $mapped->slice_pitch
		2336
		2337	Return the row or slice pitch of the image that has been mapped.
		2338
		2339	=back
		2340
		2341
1273	=cut	2342	=cut
1274
1275	package OpenCL;
1276
1277	use common::sense;
1278
1279	BEGIN {
1280	our $VERSION = '0.59';
1281
1282	require XSLoader;
1283	XSLoader::load (__PACKAGE__, $VERSION);
1284
1285	@OpenCL::Buffer::ISA =
1286	@OpenCL::Image::ISA = OpenCL::Memory::;
1287
1288	@OpenCL::Image2D::ISA =
1289	@OpenCL::Image3D::ISA = OpenCL::Image::;
1290
1291	@OpenCL::UserEvent::ISA = OpenCL::Event::;
1292	}
1293		2343
1294	1;	2344	1;
1295		2345
1296	=head1 AUTHOR	2346	=head1 AUTHOR
1297		2347

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