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Revision 1.16 by root, Thu Nov 17 03:42:03 2011 UTC vs.
Revision 1.77 by root, Sat May 5 12:54:03 2012 UTC

…		…
27	OpenCL::Program objects, which store source code and, after building for a	27	OpenCL::Program objects, which store source code and, after building for a
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::Buffers 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.
…		…
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/
		59
		60	If you are into UML class diagrams, the following diagram might help - if
		61	not, it will be mildly confusing (also, the class hierarchy of this module
		62	is much more fine-grained):
		63
		64	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/classDiagram.html
56		65
57	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
58	is, but at least it's free of charge:	67	is, but at least it's free of charge:
59		68
60	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
61		70
62	If you are into UML class diagrams, the following diagram might help - if	71	And here's NVIDIA's OpenCL Best Practises Guide:
63	not, it will be mildly cofusing:
64		72
65	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/classDiagram.html	73	http://developer.download.nvidia.com/compute/cuda/3_2/toolkit/docs/OpenCL_Best_Practices_Guide.pdf
66		74
67	=head1 BASIC WORKFLOW	75	=head1 BASIC WORKFLOW
68		76
69	To get something done, you basically have to do this once (refer to the	77	To get something done, you basically have to do this once (refer to the
70	examples below for actual code, this is just a high-level description):	78	examples below for actual code, this is just a high-level description):
…		…
89		97
90	Enqueue the kernel execution.	98	Enqueue the kernel execution.
91		99
92	Enqueue buffer reads for your output buffer to read results.	100	Enqueue buffer reads for your output buffer to read results.
93		101
		102	=head1 OPENCL 1.1 VS. OPENCL 1.2
		103
		104	This module supports both OpenCL version 1.1 and 1.2, although the OpenCL
		105	1.2 interface hasn't been tested much for lack of availability of an
		106	actual implementation.
		107
		108	Every function or method in this manual page that interfaces to a
		109	particular OpenCL function has a link to the its C manual page.
		110
		111	If the link contains a F<1.1>, then this function is an OpenCL 1.1
		112	function. Most but not all also exist in OpenCL 1.2, and this module
		113	tries to emulate the missing ones for you, when told to do so at
		114	compiletime. You cna check whether a function was removed in OpenCL 1.2 by
		115	replacing the F<1.1> component in the URL by F<1.2>.
		116
		117	If the link contains a F<1.2>, then this is a OpenCL 1.2-only
		118	function. Even if the module was compiled with OpenCL 1.2 header files
		119	and has an 1.2 OpenCL library, calling such a function on a platform that
		120	doesn't implement 1.2 causes undefined behaviour, usually a crash (But
		121	this is not guaranteed).
		122
		123	You can find out whether this module was compiled to prefer 1.1
		124	functionality by ooking at C<OpenCL::PREFER_1_1> - if it is true, then
		125	1.1 functions generally are implemented using 1.1 OpenCL functions. If it
		126	is false, then 1.1 functions missing from 1.2 are emulated by calling 1.2
		127	fucntions.
		128
		129	This is a somewhat sorry state of affairs, but the Khronos group choose to
		130	make every release of OpenCL source and binary incompatible with previous
		131	releases.
		132
94	=head1 EXAMPLES	133	=head1 EXAMPLES
95		134
96	=head2 Enumerate all devices and get contexts for them.	135	=head2 Enumerate all devices and get contexts for them.
97		136
98	Best run this once to get a feel for the platforms and devices in your	137	Best run this once to get a feel for the platforms and devices in your
99	system.	138	system.
100		139
101	for my $platform (OpenCL::platforms) {	140	for my $platform (OpenCL::platforms) {
102	printf "platform: %s\n", $platform->info (OpenCL::PLATFORM_NAME);	141	printf "platform: %s\n", $platform->name;
103	printf "extensions: %s\n", $platform->info (OpenCL::PLATFORM_EXTENSIONS);	142	printf "extensions: %s\n", $platform->extensions;
104	for my $device ($platform->devices) {	143	for my $device ($platform->devices) {
105	printf "+ device: %s\n", $device->info (OpenCL::DEVICE_NAME);	144	printf "+ device: %s\n", $device->name;
106	my $ctx = $device->context;	145	my $ctx = $platform->context (undef, [$device]);
107	# do stuff	146	# do stuff
108	}	147	}
109	}	148	}
110		149
111	=head2 Get a useful context and a command queue.	150	=head2 Get a useful context and a command queue.
…		…
134	=head2 Create a buffer with some predefined data, read it back synchronously,	173	=head2 Create a buffer with some predefined data, read it back synchronously,
135	then asynchronously.	174	then asynchronously.
136		175
137	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");	176	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");
138		177
139	$queue->enqueue_read_buffer ($buf, 1, 1, 3, my $data);	178	$queue->read_buffer ($buf, 1, 1, 3, my $data);
140	print "$data\n";	179	print "$data\n";
141		180
142	my $ev = $queue->enqueue_read_buffer ($buf, 0, 1, 3, my $data);	181	my $ev = $queue->read_buffer ($buf, 0, 1, 3, my $data);
143	$ev->wait;	182	$ev->wait;
144	print "$data\n"; # prints "elm"	183	print "$data\n"; # prints "elm"
145		184
146	=head2 Create and build a program, then create a kernel out of one of its	185	=head2 Create and build a program, then create a kernel out of one of its
147	functions.	186	functions.
148		187
149	my $src = '	188	my $src = '
150	__kernel void	189	kernel void
151	squareit (__global float *input, __global float *output)	190	squareit (global float *input, global float *output)
152	{	191	{
153	$id = get_global_id (0);	192	$id = get_global_id (0);
154	output [id] = input [id] * input [id];	193	output [id] = input [id] * input [id];
155	}	194	}
156	';	195	';
157		196
158	my $prog = $ctx->program_with_source ($src);	197	my $prog = $ctx->build_program ($src);
159
160	# build croaks on compile errors, so catch it and print the compile errors
161	eval { $prog->build ($dev); 1 }
162	or die $prog->build_info ($dev, OpenCL::PROGRAM_BUILD_LOG);
163
164	my $kernel = $prog->kernel ("squareit");	198	my $kernel = $prog->kernel ("squareit");
165		199
166	=head2 Create some input and output float buffers, then call the	200	=head2 Create some input and output float buffers, then call the
167	'squareit' kernel on them.	201	'squareit' kernel on them.
168		202
…		…
172	# set buffer	206	# set buffer
173	$kernel->set_buffer (0, $input);	207	$kernel->set_buffer (0, $input);
174	$kernel->set_buffer (1, $output);	208	$kernel->set_buffer (1, $output);
175		209
176	# execute it for all 4 numbers	210	# execute it for all 4 numbers
177	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	211	$queue->nd_range_kernel ($kernel, undef, [4], undef);
178		212
179	# enqueue a synchronous read	213	# enqueue a synchronous read
180	$queue->enqueue_read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	214	$queue->read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
181		215
182	# print the results:	216	# print the results:
183	printf "%s\n", join ", ", unpack "f*", $data;	217	printf "%s\n", join ", ", unpack "f*", $data;
184		218
185	=head2 The same enqueue operations as before, but assuming an out-of-order queue,	219	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
186	showing off barriers.	220	showing off barriers.
187		221
188	# execute it for all 4 numbers	222	# execute it for all 4 numbers
189	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	223	$queue->nd_range_kernel ($kernel, undef, [4], undef);
190		224
191	# enqueue a barrier to ensure in-order execution	225	# enqueue a barrier to ensure in-order execution
192	$queue->enqueue_barrier;	226	$queue->barrier;
193		227
194	# enqueue an async read	228	# enqueue an async read
195	$queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	229	$queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
196		230
197	# wait for all requests to finish	231	# wait for all requests to finish
198	$queue->finish;	232	$queue->finish;
199		233
200	=head2 The same enqueue operations as before, but assuming an out-of-order queue,	234	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
201	showing off event objects and wait lists.	235	showing off event objects and wait lists.
202		236
203	# execute it for all 4 numbers	237	# execute it for all 4 numbers
204	my $ev = $queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	238	my $ev = $queue->nd_range_kernel ($kernel, undef, [4], undef);
205		239
206	# enqueue an async read	240	# enqueue an async read
207	$ev = $queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);	241	$ev = $queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);
208		242
209	# wait for the last event to complete	243	# wait for the last event to complete
210	$ev->wait;	244	$ev->wait;
		245
		246	=head2 Use the OpenGL module to share a texture between OpenCL and OpenGL and draw some julia
		247	set flight effect.
		248
		249	This is quite a long example to get you going - you can download it from
		250	L<http://cvs.schmorp.de/OpenCL/examples/juliaflight>.
		251
		252	use OpenGL ":all";
		253	use OpenCL;
		254
		255	my $S = $ARGV[0] || 256; # window/texture size, smaller is faster
		256
		257	# open a window and create a gl texture
		258	OpenGL::glpOpenWindow width => $S, height => $S;
		259	my $texid = glGenTextures_p 1;
		260	glBindTexture GL_TEXTURE_2D, $texid;
		261	glTexImage2D_c GL_TEXTURE_2D, 0, GL_RGBA8, $S, $S, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0;
		262
		263	# find and use the first opencl device that let's us get a shared opengl context
		264	my $platform;
		265	my $dev;
		266	my $ctx;
		267
		268	for (OpenCL::platforms) {
		269	$platform = $_;
		270	for ($platform->devices) {
		271	$dev = $_;
		272	$ctx = $platform->context ([OpenCL::GLX_DISPLAY_KHR, undef, OpenCL::GL_CONTEXT_KHR, undef], [$dev])
		273	and last;
		274	}
		275	}
		276
		277	$ctx
		278	or die "cannot find suitable OpenCL device\n";
		279
		280	my $queue = $ctx->queue ($dev);
		281
		282	# now attach an opencl image2d object to the opengl texture
		283	my $tex = $ctx->gl_texture2d (OpenCL::MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, $texid);
		284
		285	# now the boring opencl code
		286	my $src = <<EOF;
		287	kernel void
		288	juliatunnel (write_only image2d_t img, float time)
		289	{
		290	int2 xy = (int2)(get_global_id (0), get_global_id (1));
		291	float2 p = convert_float2 (xy) / $S.f * 2.f - 1.f;
		292
		293	float2 m = (float2)(1.f, p.y) / fabs (p.x); // tunnel
		294	m.x = fabs (fmod (m.x + time * 0.05f, 4.f) - 2.f);
		295
		296	float2 z = m;
		297	float2 c = (float2)(sin (time * 0.01133f), cos (time * 0.02521f));
		298
		299	for (int i = 0; i < 25 && dot (z, z) < 4.f; ++i) // standard julia
		300	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		301
		302	float3 colour = (float3)(z.x, z.y, atan2 (z.y, z.x));
		303	write_imagef (img, xy, (float4)(colour * p.x * p.x, 1.));
		304	}
		305	EOF
		306
		307	my $prog = $ctx->build_program ($src);
		308	my $kernel = $prog->kernel ("juliatunnel");
		309
		310	# program compiled, kernel ready, now draw and loop
		311
		312	for (my $time; ; ++$time) {
		313	# acquire objects from opengl
		314	$queue->acquire_gl_objects ([$tex]);
		315
		316	# configure and run our kernel
		317	$kernel->setf ("mf", $tex, $time*2); # mf = memory object, float
		318	$queue->nd_range_kernel ($kernel, undef, [$S, $S], undef);
		319
		320	# release objects to opengl again
		321	$queue->release_gl_objects ([$tex]);
		322
		323	# wait
		324	$queue->finish;
		325
		326	# now draw the texture, the defaults should be all right
		327	glTexParameterf GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST;
		328
		329	glEnable GL_TEXTURE_2D;
		330	glBegin GL_QUADS;
		331	glTexCoord2f 0, 1; glVertex3i -1, -1, -1;
		332	glTexCoord2f 0, 0; glVertex3i 1, -1, -1;
		333	glTexCoord2f 1, 0; glVertex3i 1, 1, -1;
		334	glTexCoord2f 1, 1; glVertex3i -1, 1, -1;
		335	glEnd;
		336
		337	glXSwapBuffers;
		338
		339	select undef, undef, undef, 1/60;
		340	}
		341
		342	=head2 How to modify the previous example to not rely on GL sharing.
		343
		344	For those poor souls with only a sucky CPU OpenCL implementation, you
		345	currently have to read the image into some perl scalar, and then modify a
		346	texture or use glDrawPixels or so).
		347
		348	First, when you don't need gl sharing, you can create the context much simpler:
		349
		350	$ctx = $platform->context (undef, [$dev])
		351
		352	To use a texture, you would modify the above example by creating an
		353	OpenCL::Image manually instead of deriving it from a texture:
		354
		355	my $tex = $ctx->image2d (OpenCL::MEM_WRITE_ONLY, OpenCL::RGBA, OpenCL::UNORM_INT8, $S, $S);
		356
		357	And in the draw loop, intead of acquire_gl_objects/release_gl_objects, you
		358	would read the image2d after the kernel has written it:
		359
		360	$queue->read_image ($tex, 0, 0, 0, 0, $S, $S, 1, 0, 0, my $data);
		361
		362	And then you would upload the pixel data to the texture (or use glDrawPixels):
		363
		364	glTexSubImage2D_s GL_TEXTURE_2D, 0, 0, 0, $S, $S, GL_RGBA, GL_UNSIGNED_BYTE, $data;
		365
		366	The fully modified example can be found at
		367	L<http://cvs.schmorp.de/OpenCL/examples/juliaflight-nosharing>.
		368
		369	=head2 Julia sets look soooo 80ies.
		370
		371	Then colour them differently, e.g. using orbit traps! Replace the loop and
		372	colour calculation from the previous examples by this:
		373
		374	float2 dm = (float2)(1.f, 1.f);
		375
		376	for (int i = 0; i < 25; ++i)
		377	{
		378	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		379	dm = fmin (dm, (float2)(fabs (dot (z, z) - 1.f), fabs (z.x - 1.f)));
		380	}
		381
		382	float3 colour = (float3)(dm.x * dm.y, dm.x * dm.y, dm.x);
		383
		384	Also try C<-10.f> instead of C<-1.f>.
211		385
212	=head1 DOCUMENTATION	386	=head1 DOCUMENTATION
213		387
214	=head2 BASIC CONVENTIONS	388	=head2 BASIC CONVENTIONS
215		389
…		…
222		396
223	=item * Object lifetime managament is automatic - there is no need	397	=item * Object lifetime managament is automatic - there is no need
224	to free objects explicitly (C<clReleaseXXX>), the release function	398	to free objects explicitly (C<clReleaseXXX>), the release function
225	is called automatically once all Perl references to it go away.	399	is called automatically once all Perl references to it go away.
226		400
227	=item * OpenCL uses CamelCase for function names (C<clGetPlatformInfo>),	401	=item * OpenCL uses CamelCase for function names
		402	(e.g. C<clGetPlatformIDs>, C<clGetPlatformInfo>), while this module
228	while this module uses underscores as word separator and often leaves out	403	uses underscores as word separator and often leaves out prefixes
229	prefixes (C<< $platform->info >>).	404	(C<OpenCL::platforms>, C<< $platform->info >>).
230		405
231	=item * OpenCL often specifies fixed vector function arguments as short	406	=item * OpenCL often specifies fixed vector function arguments as short
232	arrays (C<$origin[3]>), while this module explicitly expects the	407	arrays (C<size_t origin[3]>), while this module explicitly expects the
233	components as separate arguments-	408	components as separate arguments (C<$orig_x, $orig_y, $orig_z>) in
		409	function calls.
234		410
235	=item * Structures are often specified with their components, and returned	411	=item * Structures are often specified by flattening out their components
236	as arrayrefs.	412	as with short vectors, and returned as arrayrefs.
237
238	=item * Where possible, one of the pitch values is calculated from the
239	perl scalar length and need not be specified.
240		413
241	=item * When enqueuing commands, the wait list is specified by adding	414	=item * When enqueuing commands, the wait list is specified by adding
242	extra arguments to the function - anywhere a C<$wait_events...> argument	415	extra arguments to the function - anywhere a C<$wait_events...> argument
243	is documented this can be any number of event objects.	416	is documented this can be any number of event objects. As an extsnion
		417	implemented by this module, C<undef> values will be ignored in the event
		418	list.
244		419
245	=item * When enqueuing commands, if the enqueue method is called in void	420	=item * When enqueuing commands, if the enqueue method is called in void
246	context, no event is created. In all other contexts an event is returned	421	context, no event is created. In all other contexts an event is returned
247	by the method.	422	by the method.
248		423
…		…
268	ulong IV - Q	443	ulong IV - Q
269	float NV float f	444	float NV float f
270	half IV ushort S	445	half IV ushort S
271	double NV double d	446	double NV double d
272		447
		448	=head2 GLX SUPPORT
		449
		450	Due to the sad state that OpenGL support is in in Perl (mostly the OpenGL
		451	module, which has little to no documentation and has little to no support
		452	for glX), this module, as a special extension, treats context creation
		453	properties C<OpenCL::GLX_DISPLAY_KHR> and C<OpenCL::GL_CONTEXT_KHR>
		454	specially: If either or both of these are C<undef>, then the OpenCL
		455	module tries to dynamically resolve C<glXGetCurrentDisplay> and
		456	C<glXGetCurrentContext>, call these functions and use their return values
		457	instead.
		458
		459	For this to work, the OpenGL library must be loaded, a GLX context must
		460	have been created and be made current, and C<dlsym> must be available and
		461	capable of finding the function via C<RTLD_DEFAULT>.
		462
		463	=head2 EVENT SYSTEM
		464
		465	OpenCL can generate a number of (potentially) asynchronous events, for
		466	example, after compiling a program, to signal a context-related error or,
		467	perhaps most important, to signal completion of queued jobs (by setting
		468	callbacks on OpenCL::Event objects).
		469
		470	The OpenCL module converts all these callbacks into events - you can
		471	still register callbacks, but they are not executed when your OpenCL
		472	implementation calls the actual callback, but only later. Therefore, none
		473	of the limitations of OpenCL callbacks apply to the perl implementation:
		474	it is perfectly safe to make blocking operations from event callbacks, and
		475	enqueued operations don't need to be flushed.
		476
		477	To facilitate this, this module maintains an event queue - each
		478	time an asynchronous event happens, it is queued, and perl will be
		479	interrupted. This is implemented via the L<Async::Interrupt> module. In
		480	addition, this module has L<AnyEvent> support, so it can seamlessly
		481	integrate itself into many event loops.
		482
		483	Since L<Async::Interrupt> is a bit hard to understand, here are some case examples:
		484
		485	=head3 Don't use callbacks.
		486
		487	When your program never uses any callbacks, then there will never be any
		488	notifications you need to take care of, and therefore no need to worry
		489	about all this.
		490
		491	You can achieve a great deal by explicitly waiting for events, or using
		492	barriers and flush calls. In many programs, there is no need at all to
		493	tinker with asynchronous events.
		494
		495	=head3 Use AnyEvent
		496
		497	This module automatically registers a watcher that invokes all outstanding
		498	event callbacks when AnyEvent is initialised (and block asynchronous
		499	interruptions). Using this mode of operations is the safest and most
		500	recommended one.
		501
		502	To use this, simply use AnyEvent and this module normally, make sure you
		503	have an event loop running:
		504
		505	use Gtk2 -init;
		506	use AnyEvent;
		507
		508	# initialise AnyEvent, by creating a watcher, or:
		509	AnyEvent::detect;
		510
		511	my $e = $queue->marker;
		512	$e->cb (sub {
		513	warn "opencl is finished\n";
		514	})
		515
		516	main Gtk2;
		517
		518	Note that this module will not initialise AnyEvent for you. Before
		519	AnyEvent is initialised, the module will asynchronously interrupt perl
		520	instead. To avoid any surprises, it's best to explicitly initialise
		521	AnyEvent.
		522
		523	You can temporarily enable asynchronous interruptions (see next paragraph)
		524	by calling C<$OpenCL::INTERRUPT->unblock> and disable them again by
		525	calling C<$OpenCL::INTERRUPT->block>.
		526
		527	=head3 Let yourself be interrupted at any time
		528
		529	This mode is the default unless AnyEvent is loaded and initialised. In
		530	this mode, OpenCL asynchronously interrupts a running perl program. The
		531	emphasis is on both I<asynchronously> and I<running> here.
		532
		533	Asynchronously means that perl might execute your callbacks at any
		534	time. For example, in the following code (I<THAT YOU SHOULD NOT COPY>),
		535	the C<until> loop following the marker call will be interrupted by the
		536	callback:
		537
		538	my $e = $queue->marker;
		539	my $flag;
		540	$e->cb (sub { $flag = 1 });
		541	1 until $flag;
		542	# $flag is now 1
		543
		544	The reason why you shouldn't blindly copy the above code is that
		545	busy waiting is a really really bad thing, and really really bad for
		546	performance.
		547
		548	While at first this asynchronous business might look exciting, it can be
		549	really hard, because you need to be prepared for the callback code to be
		550	executed at any time, which limits the amount of things the callback code
		551	can do safely.
		552
		553	This can be mitigated somewhat by using C<<
		554	$OpenCL::INTERRUPT->scope_block >> (see the L<Async::Interrupt>
		555	documentation for details).
		556
		557	The other problem is that your program must be actively I<running> to be
		558	interrupted. When you calculate stuff, your program is running. When you
		559	hang in some C functions or other block execution (by calling C<sleep>,
		560	C<select>, running an event loop and so on), your program is waiting, not
		561	running.
		562
		563	One way around that would be to attach a read watcher to your event loop,
		564	listening for events on C<< $OpenCL::INTERRUPT->pipe_fileno >>, using a
		565	dummy callback (C<sub { }>) to temporarily execute some perl code.
		566
		567	That is then awfully close to using the built-in AnyEvent support above,
		568	though, so consider that one instead.
		569
		570	=head3 Be creative
		571
		572	OpenCL exports the L<Async::Interrupt> object it uses in the global
		573	variable C<$OpenCL::INTERRUPT>. You can configure it in any way you like.
		574
		575	So if you want to feel like a real pro, err, wait, if you feel no risk
		576	menas no fun, you can experiment by implementing your own mode of
		577	operations.
		578
		579	=cut
		580
		581	package OpenCL;
		582
		583	use common::sense;
		584	use Carp ();
		585	use Async::Interrupt ();
		586
		587	our $POLL_FUNC; # set by XS
		588
		589	BEGIN {
		590	our $VERSION = '0.99';
		591
		592	require XSLoader;
		593	XSLoader::load (__PACKAGE__, $VERSION);
		594
		595	@OpenCL::Platform::ISA =
		596	@OpenCL::Device::ISA =
		597	@OpenCL::Context::ISA =
		598	@OpenCL::Queue::ISA =
		599	@OpenCL::Memory::ISA =
		600	@OpenCL::Sampler::ISA =
		601	@OpenCL::Program::ISA =
		602	@OpenCL::Kernel::ISA =
		603	@OpenCL::Event::ISA = OpenCL::Object::;
		604
		605	@OpenCL::SubDevice::ISA = OpenCL::Device::;
		606
		607	@OpenCL::Buffer::ISA =
		608	@OpenCL::Image::ISA = OpenCL::Memory::;
		609
		610	@OpenCL::BufferObj::ISA = OpenCL::Buffer::;
		611
		612	@OpenCL::Image2D::ISA =
		613	@OpenCL::Image3D::ISA =
		614	@OpenCL::Image2DArray::ISA =
		615	@OpenCL::Image1D::ISA =
		616	@OpenCL::Image1DArray::ISA =
		617	@OpenCL::Image1DBuffer::ISA = OpenCL::Image::;
		618
		619	@OpenCL::UserEvent::ISA = OpenCL::Event::;
		620
		621	@OpenCL::MappedBuffer::ISA =
		622	@OpenCL::MappedImage::ISA = OpenCL::Mapped::;
		623	}
		624
273	=head2 THE OpenCL PACKAGE	625	=head2 THE OpenCL PACKAGE
274		626
275	=over 4	627	=over 4
276		628
277	=item $int = OpenCL::errno	629	=item $int = OpenCL::errno
278		630
279	The last error returned by a function - it's only valid after an error occured	631	The last error returned by a function - it's only valid after an error occured
280	and before calling another OpenCL function.	632	and before calling another OpenCL function.
281		633
282	=item $str = OpenCL::err2str $errval	634	=item $str = OpenCL::err2str [$errval]
283		635
284	Comverts an error value into a human readable string.	636	Converts an error value into a human readable string. IF no error value is
		637	given, then the last error will be used (as returned by OpenCL::errno).
285		638
286	=item $str = OpenCL::enum2str $enum	639	=item $str = OpenCL::enum2str $enum
287		640
288	Converts most enum values (inof parameter names, image format constants,	641	Converts most enum values (of parameter names, image format constants,
289	object types, addressing and filter modes, command types etc.) into a	642	object types, addressing and filter modes, command types etc.) into a
290	human readbale string. When confronted with some random integer it can be	643	human readable string. When confronted with some random integer it can be
291	very helpful to pass it through this function to maybe get some readable	644	very helpful to pass it through this function to maybe get some readable
292	string out of it.	645	string out of it.
293		646
294	=item @platforms = OpenCL::platforms	647	=item @platforms = OpenCL::platforms
295		648
296	Returns all available OpenCL::Platform objects.	649	Returns all available OpenCL::Platform objects.
297		650
298	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>	651	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>
299		652
300	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef	653	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr
301		654
302	Tries to create a context from a default device and platform - never worked for me.	655	Tries to create a context from a default device and platform type - never worked for me.
		656	Consider using C<< $platform->context_from_type >> instead.
		657
		658	type: OpenCL::DEVICE_TYPE_DEFAULT, OpenCL::DEVICE_TYPE_CPU, OpenCL::DEVICE_TYPE_GPU,
		659	OpenCL::DEVICE_TYPE_ACCELERATOR, OpenCL::DEVICE_TYPE_CUSTOM, OpenCL::DEVICE_TYPE_ALL.
303		660
304	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	661	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
305		662
		663	=item $ctx = OpenCL::context $properties, \@devices, $callback->($err, $pvt) = $print_stderr)
		664
		665	Create a new OpenCL::Context object using the given device object(s).
		666	Consider using C<< $platform->context >> instead.
		667
		668	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
		669
306	=item OpenCL::wait_for_events $wait_events...	670	=item OpenCL::wait_for_events $wait_events...
307		671
308	Waits for all events to complete.	672	Waits for all events to complete.
309		673
310	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	674	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
311		675
		676	=item OpenCL::poll
		677
		678	Checks if there are any outstanding events (see L<EVENT SYSTEM>) and
		679	invokes their callbacks.
		680
		681	=item $OpenCL::INTERRUPT
		682
		683	The L<Async::Interrupt> object used to signal asynchronous events (see
		684	L<EVENT SYSTEM>).
		685
		686	=cut
		687
		688	our $INTERRUPT = new Async::Interrupt c_cb => [$POLL_FUNC, 0];
		689
		690	&_eq_initialise ($INTERRUPT->signal_func);
		691
		692	=item $OpenCL::WATCHER
		693
		694	The L<AnyEvent> watcher object used to watch for asynchronous events (see
		695	L<EVENT SYSTEM>). This variable is C<undef> until L<AnyEvent> has been
		696	loaded I<and> initialised (e.g. by calling C<AnyEvent::detect>).
		697
		698	=cut
		699
		700	our $WATCHER;
		701
		702	sub _init_anyevent {
		703	$INTERRUPT->block;
		704	$WATCHER = AE::io ($INTERRUPT->pipe_fileno, 0, sub { $INTERRUPT->handle });
		705	}
		706
		707	if (defined $AnyEvent::MODEL) {
		708	_init_anyevent;
		709	} else {
		710	push @AnyEvent::post_detect, \&_init_anyevent;
		711	}
		712
312	=back	713	=back
313		714
		715	=head2 THE OpenCL::Object CLASS
		716
		717	This is the base class for all objects in the OpenCL module. The only
		718	method it implements is the C<id> method, which is only useful if you want
		719	to interface to OpenCL on the C level.
		720
		721	=over 4
		722
		723	=item $iv = $obj->id
		724
		725	OpenCL objects are represented by pointers or integers on the C level. If
		726	you want to interface to an OpenCL object directly on the C level, then
		727	you need this value, which is returned by this method. You should use an
		728	C<IV> type in your code and cast that to the correct type.
		729
		730	=cut
		731
		732	sub OpenCL::Object::id {
		733	ref $_[0] eq "SCALAR"
		734	? ${ $_[0] }
		735	: $_[0][0]
		736	}
		737
		738	=back
		739
314	=head2 THE OpenCL::Platform CLASS	740	=head2 THE OpenCL::Platform CLASS
315		741
316	=over 4	742	=over 4
317		743
318	=item $packed_value = $platform->info ($name)
319
320	Calls C<clGetPlatformInfo> and returns the packed, raw value - for
321	strings, this will be the string, for other values you probably need to
322	use the correct C<unpack>. This might get improved in the future. Hopefully.
323
324	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>
325
326	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)	744	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)
327		745
328	Returns a list of matching OpenCL::Device objects.	746	Returns a list of matching OpenCL::Device objects.
329		747
330	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef)	748	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr)
331		749
332	Tries to create a context. Never worked for me, and you need devices explitly anyway.	750	Tries to create a context. Never worked for me, and you need devices explicitly anyway.
333		751
334	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	752	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
335		753
336	=item $ctx = $device->context ($properties = undef, @$devices, $notify = undef)	754	=item $ctx = $platform->context ($properties, \@devices, $callback->($err, $pvt) = $print_stderr)
337		755
338	Create a new OpenCL::Context object using the given device object(s)- a	756	Create a new OpenCL::Context object using the given device object(s)- a
339	CL_CONTEXT_PLATFORM property is supplied automatically.	757	CL_CONTEXT_PLATFORM property is supplied automatically.
340		758
341	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>	759	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
342		760
		761	=item $packed_value = $platform->info ($name)
		762
		763	Calls C<clGetPlatformInfo> and returns the packed, raw value - for
		764	strings, this will be the string (possibly including terminating \0), for
		765	other values you probably need to use the correct C<unpack>.
		766
		767	It's best to avoid this method and use one of the following convenience
		768	wrappers.
		769
		770	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>
		771
		772	=item $platform->unload_compiler
		773
		774	Attempts to unload the compiler for this platform, for endless
		775	profit. Does nothing on OpenCL 1.1.
		776
		777	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clUnloadPlatformCompiler.html>
		778
		779	=for gengetinfo begin platform
		780
		781	=item $string = $platform->profile
		782
		783	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_PROFILE> and returns the result.
		784
		785	=item $string = $platform->version
		786
		787	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_VERSION> and returns the result.
		788
		789	=item $string = $platform->name
		790
		791	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_NAME> and returns the result.
		792
		793	=item $string = $platform->vendor
		794
		795	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_VENDOR> and returns the result.
		796
		797	=item $string = $platform->extensions
		798
		799	Calls C<clGetPlatformInfo> with C<OpenCL::PLATFORM_EXTENSIONS> and returns the result.
		800
		801	=for gengetinfo end platform
		802
343	=back	803	=back
344		804
345	=head2 THE OpenCL::Device CLASS	805	=head2 THE OpenCL::Device CLASS
346		806
347	=over 4	807	=over 4
…		…
350		810
351	See C<< $platform->info >> for details.	811	See C<< $platform->info >> for details.
352		812
353	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>	813	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>
354		814
		815	=item @devices = $device->sub_devices (\@properties)
		816
		817	Creates OpencL::SubDevice objects by partitioning an existing device.
		818
		819	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateSubDevices.html>
		820
		821	=for gengetinfo begin device
		822
		823	=item $device_type = $device->type
		824
		825	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_TYPE> and returns the result.
		826
		827	=item $uint = $device->vendor_id
		828
		829	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VENDOR_ID> and returns the result.
		830
		831	=item $uint = $device->max_compute_units
		832
		833	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_COMPUTE_UNITS> and returns the result.
		834
		835	=item $uint = $device->max_work_item_dimensions
		836
		837	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result.
		838
		839	=item $int = $device->max_work_group_size
		840
		841	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_GROUP_SIZE> and returns the result.
		842
		843	=item @ints = $device->max_work_item_sizes
		844
		845	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WORK_ITEM_SIZES> and returns the result.
		846
		847	=item $uint = $device->preferred_vector_width_char
		848
		849	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result.
		850
		851	=item $uint = $device->preferred_vector_width_short
		852
		853	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result.
		854
		855	=item $uint = $device->preferred_vector_width_int
		856
		857	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result.
		858
		859	=item $uint = $device->preferred_vector_width_long
		860
		861	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result.
		862
		863	=item $uint = $device->preferred_vector_width_float
		864
		865	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result.
		866
		867	=item $uint = $device->preferred_vector_width_double
		868
		869	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result.
		870
		871	=item $uint = $device->max_clock_frequency
		872
		873	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CLOCK_FREQUENCY> and returns the result.
		874
		875	=item $bitfield = $device->address_bits
		876
		877	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ADDRESS_BITS> and returns the result.
		878
		879	=item $uint = $device->max_read_image_args
		880
		881	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_READ_IMAGE_ARGS> and returns the result.
		882
		883	=item $uint = $device->max_write_image_args
		884
		885	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result.
		886
		887	=item $ulong = $device->max_mem_alloc_size
		888
		889	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result.
		890
		891	=item $int = $device->image2d_max_width
		892
		893	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE2D_MAX_WIDTH> and returns the result.
		894
		895	=item $int = $device->image2d_max_height
		896
		897	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result.
		898
		899	=item $int = $device->image3d_max_width
		900
		901	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_WIDTH> and returns the result.
		902
		903	=item $int = $device->image3d_max_height
		904
		905	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result.
		906
		907	=item $int = $device->image3d_max_depth
		908
		909	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE3D_MAX_DEPTH> and returns the result.
		910
		911	=item $uint = $device->image_support
		912
		913	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_IMAGE_SUPPORT> and returns the result.
		914
		915	=item $int = $device->max_parameter_size
		916
		917	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_PARAMETER_SIZE> and returns the result.
		918
		919	=item $uint = $device->max_samplers
		920
		921	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_SAMPLERS> and returns the result.
		922
		923	=item $uint = $device->mem_base_addr_align
		924
		925	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result.
		926
		927	=item $uint = $device->min_data_type_align_size
		928
		929	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result.
		930
		931	=item $device_fp_config = $device->single_fp_config
		932
		933	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_SINGLE_FP_CONFIG> and returns the result.
		934
		935	=item $device_mem_cache_type = $device->global_mem_cache_type
		936
		937	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result.
		938
		939	=item $uint = $device->global_mem_cacheline_size
		940
		941	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result.
		942
		943	=item $ulong = $device->global_mem_cache_size
		944
		945	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result.
		946
		947	=item $ulong = $device->global_mem_size
		948
		949	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_GLOBAL_MEM_SIZE> and returns the result.
		950
		951	=item $ulong = $device->max_constant_buffer_size
		952
		953	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result.
		954
		955	=item $uint = $device->max_constant_args
		956
		957	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_MAX_CONSTANT_ARGS> and returns the result.
		958
		959	=item $device_local_mem_type = $device->local_mem_type
		960
		961	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_LOCAL_MEM_TYPE> and returns the result.
		962
		963	=item $ulong = $device->local_mem_size
		964
		965	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_LOCAL_MEM_SIZE> and returns the result.
		966
		967	=item $boolean = $device->error_correction_support
		968
		969	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result.
		970
		971	=item $int = $device->profiling_timer_resolution
		972
		973	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result.
		974
		975	=item $boolean = $device->endian_little
		976
		977	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_ENDIAN_LITTLE> and returns the result.
		978
		979	=item $boolean = $device->available
		980
		981	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_AVAILABLE> and returns the result.
		982
		983	=item $boolean = $device->compiler_available
		984
		985	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_COMPILER_AVAILABLE> and returns the result.
		986
		987	=item $device_exec_capabilities = $device->execution_capabilities
		988
		989	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_EXECUTION_CAPABILITIES> and returns the result.
		990
		991	=item $command_queue_properties = $device->properties
		992
		993	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_QUEUE_PROPERTIES> and returns the result.
		994
		995	=item $ = $device->platform
		996
		997	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PLATFORM> and returns the result.
		998
		999	=item $string = $device->name
		1000
		1001	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NAME> and returns the result.
		1002
		1003	=item $string = $device->vendor
		1004
		1005	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VENDOR> and returns the result.
		1006
		1007	=item $string = $device->driver_version
		1008
		1009	Calls C<clGetDeviceInfo> with C<OpenCL::DRIVER_VERSION> and returns the result.
		1010
		1011	=item $string = $device->profile
		1012
		1013	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PROFILE> and returns the result.
		1014
		1015	=item $string = $device->version
		1016
		1017	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_VERSION> and returns the result.
		1018
		1019	=item $string = $device->extensions
		1020
		1021	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_EXTENSIONS> and returns the result.
		1022
		1023	=item $uint = $device->preferred_vector_width_half
		1024
		1025	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result.
		1026
		1027	=item $uint = $device->native_vector_width_char
		1028
		1029	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result.
		1030
		1031	=item $uint = $device->native_vector_width_short
		1032
		1033	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result.
		1034
		1035	=item $uint = $device->native_vector_width_int
		1036
		1037	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result.
		1038
		1039	=item $uint = $device->native_vector_width_long
		1040
		1041	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result.
		1042
		1043	=item $uint = $device->native_vector_width_float
		1044
		1045	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result.
		1046
		1047	=item $uint = $device->native_vector_width_double
		1048
		1049	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result.
		1050
		1051	=item $uint = $device->native_vector_width_half
		1052
		1053	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result.
		1054
		1055	=item $device_fp_config = $device->double_fp_config
		1056
		1057	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_DOUBLE_FP_CONFIG> and returns the result.
		1058
		1059	=item $device_fp_config = $device->half_fp_config
		1060
		1061	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_HALF_FP_CONFIG> and returns the result.
		1062
		1063	=item $boolean = $device->host_unified_memory
		1064
		1065	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_HOST_UNIFIED_MEMORY> and returns the result.
		1066
		1067	=item $device = $device->parent_device_ext
		1068
		1069	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARENT_DEVICE_EXT> and returns the result.
		1070
		1071	=item @device_partition_property_exts = $device->partition_types_ext
		1072
		1073	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARTITION_TYPES_EXT> and returns the result.
		1074
		1075	=item @device_partition_property_exts = $device->affinity_domains_ext
		1076
		1077	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_AFFINITY_DOMAINS_EXT> and returns the result.
		1078
		1079	=item $uint = $device->reference_count_ext
		1080
		1081	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_REFERENCE_COUNT_EXT> and returns the result.
		1082
		1083	=item @device_partition_property_exts = $device->partition_style_ext
		1084
		1085	Calls C<clGetDeviceInfo> with C<OpenCL::DEVICE_PARTITION_STYLE_EXT> and returns the result.
		1086
		1087	=for gengetinfo end device
		1088
355	=back	1089	=back
356		1090
357	=head2 THE OpenCL::Context CLASS	1091	=head2 THE OpenCL::Context CLASS
358		1092
		1093	An OpenCL::Context is basically a container, or manager, for a number of
		1094	devices of a platform. It is used to create all sorts of secondary objects
		1095	such as buffers, queues, programs and so on.
		1096
		1097	All context creation functions and methods take a list of properties
		1098	(type-value pairs). All property values can be specified as integers -
		1099	some additionally support other types:
		1100
359	=over 4	1101	=over 4
360		1102
361	=item $packed_value = $ctx->info ($name)	1103	=item OpenCL::CONTEXT_PLATFORM
362		1104
363	See C<< $platform->info >> for details.	1105	Also accepts OpenCL::Platform objects.
364		1106
365	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>	1107	=item OpenCL::GLX_DISPLAY_KHR
		1108
		1109	Also accepts C<undef>, in which case a deep and troubling hack is engaged
		1110	to find the current glx display (see L<GLX SUPPORT>).
		1111
		1112	=item OpenCL::GL_CONTEXT_KHR
		1113
		1114	Also accepts C<undef>, in which case a deep and troubling hack is engaged
		1115	to find the current glx context (see L<GLX SUPPORT>).
		1116
		1117	=back
		1118
		1119	=over 4
		1120
		1121	=item $prog = $ctx->build_program ($program, $options = "")
		1122
		1123	This convenience function tries to build the program on all devices in
		1124	the context. If the build fails, then the function will C<croak> with the
		1125	build log. Otherwise ti returns the program object.
		1126
		1127	The C<$program> can either be a C<OpenCL::Program> object or a string
		1128	containing the program. In the latter case, a program objetc will be
		1129	created automatically.
		1130
		1131	=cut
		1132
		1133	sub OpenCL::Context::build_program {
		1134	my ($self, $prog, $options) = @_;
		1135
		1136	$prog = $self->program_with_source ($prog)
		1137	unless ref $prog;
		1138
		1139	eval { $prog->build (undef, $options); 1 }
		1140	or errno == BUILD_PROGRAM_FAILURE
		1141	or errno == INVALID_BINARY # workaround nvidia bug
		1142	or Carp::croak "OpenCL::Context->build_program: " . err2str;
		1143
		1144	# we check status for all devices
		1145	for my $dev ($self->devices) {
		1146	$prog->build_status ($dev) == BUILD_SUCCESS
		1147	or Carp::croak "Building OpenCL program for device '" . $dev->name . "' failed:\n"
		1148	. $prog->build_log ($dev);
		1149	}
		1150
		1151	$prog
		1152	}
366		1153
367	=item $queue = $ctx->queue ($device, $properties)	1154	=item $queue = $ctx->queue ($device, $properties)
368		1155
369	Create a new OpenCL::Queue object from the context and the given device.	1156	Create a new OpenCL::Queue object from the context and the given device.
370		1157
371	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>	1158	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>
372		1159
		1160	Example: create an out-of-order queue.
		1161
		1162	$queue = $ctx->queue ($device, OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE);
		1163
373	=item $ev = $ctx->user_event	1164	=item $ev = $ctx->user_event
374		1165
375	Creates a new OpenCL::UserEvent object.	1166	Creates a new OpenCL::UserEvent object.
376		1167
377	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>	1168	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>
378		1169
379	=item $buf = $ctx->buffer ($flags, $len)	1170	=item $buf = $ctx->buffer ($flags, $len)
380		1171
381	Creates a new OpenCL::Buffer object with the given flags and octet-size.	1172	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object with the
		1173	given flags and octet-size.
		1174
		1175	flags: OpenCL::MEM_READ_WRITE, OpenCL::MEM_WRITE_ONLY, OpenCL::MEM_READ_ONLY,
		1176	OpenCL::MEM_USE_HOST_PTR, OpenCL::MEM_ALLOC_HOST_PTR, OpenCL::MEM_COPY_HOST_PTR,
		1177	OpenCL::MEM_HOST_WRITE_ONLY, OpenCL::MEM_HOST_READ_ONLY, OpenCL::MEM_HOST_NO_ACCESS.
382		1178
383	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>	1179	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>
384		1180
385	=item $buf = $ctx->buffer_sv ($flags, $data)	1181	=item $buf = $ctx->buffer_sv ($flags, $data)
386		1182
387	Creates a new OpenCL::Buffer object and initialise it with the given data values.	1183	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object and
		1184	initialise it with the given data values.
388		1185
		1186	=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)
		1187
		1188	Creates a new OpenCL::Image object and optionally initialises it with
		1189	the given data values.
		1190
		1191	channel_order: OpenCL::R, OpenCL::A, OpenCL::RG, OpenCL::RA, OpenCL::RGB,
		1192	OpenCL::RGBA, OpenCL::BGRA, OpenCL::ARGB, OpenCL::INTENSITY, OpenCL::LUMINANCE,
		1193	OpenCL::Rx, OpenCL::RGx, OpenCL::RGBx.
		1194
		1195	channel_type: OpenCL::SNORM_INT8, OpenCL::SNORM_INT16, OpenCL::UNORM_INT8,
		1196	OpenCL::UNORM_INT16, OpenCL::UNORM_SHORT_565, OpenCL::UNORM_SHORT_555,
		1197	OpenCL::UNORM_INT_101010, OpenCL::SIGNED_INT8, OpenCL::SIGNED_INT16,
		1198	OpenCL::SIGNED_INT32, OpenCL::UNSIGNED_INT8, OpenCL::UNSIGNED_INT16,
		1199	OpenCL::UNSIGNED_INT32, OpenCL::HALF_FLOAT, OpenCL::FLOAT.
		1200
		1201
		1202	type: OpenCL::MEM_OBJECT_BUFFER, OpenCL::MEM_OBJECT_IMAGE2D,
		1203	OpenCL::MEM_OBJECT_IMAGE3D, OpenCL::MEM_OBJECT_IMAGE2D_ARRAY,
		1204	OpenCL::MEM_OBJECT_IMAGE1D, OpenCL::MEM_OBJECT_IMAGE1D_ARRAY,
		1205	OpenCL::MEM_OBJECT_IMAGE1D_BUFFER.
		1206
		1207	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateImage.html>
		1208
389	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $data)	1209	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)
390		1210
391	Creates a new OpenCL::Image2D object and optionally initialises it with the given data values.	1211	Creates a new OpenCL::Image2D object and optionally initialises it with
		1212	the given data values.
392		1213
393	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>	1214	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>
394		1215
395	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $slice_pitch, $data)	1216	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)
396		1217
397	Creates a new OpenCL::Image3D object and optionally initialises it with the given data values.	1218	Creates a new OpenCL::Image3D object and optionally initialises it with
		1219	the given data values.
398		1220
399	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>	1221	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>
		1222
		1223	=item $buffer = $ctx->gl_buffer ($flags, $bufobj)
		1224
		1225	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object that refers to the given
		1226	OpenGL buffer object.
		1227
		1228	flags: OpenCL::MEM_READ_WRITE, OpenCL::MEM_READ_ONLY, OpenCL::MEM_WRITE_ONLY.
		1229
		1230	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLBuffer.html
		1231
		1232	=item $img = $ctx->gl_texture ($flags, $target, $miplevel, $texture)
		1233
		1234	Creates a new OpenCL::Image object that refers to the given OpenGL
		1235	texture object or buffer.
		1236
		1237	target: GL_TEXTURE_1D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_BUFFER,
		1238	GL_TEXTURE_2D, GL_TEXTURE_2D_ARRAY, GL_TEXTURE_3D,
		1239	GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
		1240	GL_TEXTURE_CUBE_MAP_POSITIVE_Z, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
		1241	GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
		1242	GL_TEXTURE_RECTANGLE/GL_TEXTURE_RECTANGLE_ARB.
		1243
		1244	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateFromGLTexture.html
		1245
		1246	=item $img = $ctx->gl_texture2d ($flags, $target, $miplevel, $texture)
		1247
		1248	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1249	2D texture object.
		1250
		1251	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture2D.html
		1252
		1253	=item $img = $ctx->gl_texture3d ($flags, $target, $miplevel, $texture)
		1254
		1255	Creates a new OpenCL::Image3D object that refers to the given OpenGL
		1256	3D texture object.
		1257
		1258	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture3D.html
		1259
		1260	=item $ctx->gl_renderbuffer ($flags, $renderbuffer)
		1261
		1262	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1263	render buffer.
		1264
		1265	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLRenderbuffer.html
400		1266
401	=item @formats = $ctx->supported_image_formats ($flags, $image_type)	1267	=item @formats = $ctx->supported_image_formats ($flags, $image_type)
402		1268
403	Returns a list of matching image formats - each format is an arrayref with	1269	Returns a list of matching image formats - each format is an arrayref with
404	two values, $channel_order and $channel_type, in it.	1270	two values, $channel_order and $channel_type, in it.
…		…
407		1273
408	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)	1274	=item $sampler = $ctx->sampler ($normalized_coords, $addressing_mode, $filter_mode)
409		1275
410	Creates a new OpenCL::Sampler object.	1276	Creates a new OpenCL::Sampler object.
411		1277
		1278	addressing_mode: OpenCL::ADDRESS_NONE, OpenCL::ADDRESS_CLAMP_TO_EDGE,
		1279	OpenCL::ADDRESS_CLAMP, OpenCL::ADDRESS_REPEAT, OpenCL::ADDRESS_MIRRORED_REPEAT.
		1280
		1281	filter_mode: OpenCL::FILTER_NEAREST, OpenCL::FILTER_LINEAR.
		1282
412	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>	1283	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSampler.html>
413		1284
414	=item $program = $ctx->program_with_source ($string)	1285	=item $program = $ctx->program_with_source ($string)
415		1286
416	Creates a new OpenCL::Program object from the given source code.	1287	Creates a new OpenCL::Program object from the given source code.
417		1288
418	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>	1289	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>
419		1290
		1291	=item ($program, \@status) = $ctx->program_with_binary (\@devices, \@binaries)
		1292
		1293	Creates a new OpenCL::Program object from the given binaries.
		1294
		1295	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithBinary.html>
		1296
		1297	Example: clone an existing program object that contains a successfully
		1298	compiled program, no matter how useless this is.
		1299
		1300	my $clone = $ctx->program_with_binary ([$prog->devices], [$prog->binaries]);
		1301
		1302	=item $program = $ctx->program_with_built_in_kernels (\@devices, $kernel_names)
		1303
		1304	Creates a new OpenCL::Program object from the given built-in kernel names.
		1305
		1306	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateProgramWithBuiltInKernels.html>
		1307
		1308	=item $program = $ctx->link_program (\@devices, $options, \@programs, $cb->($program) = undef)
		1309
		1310	Links all (already compiled) program objects specified in C<@programs>
		1311	together and returns a new OpenCL::Program object with the result.
		1312
		1313	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clLinkProgram.html>
		1314
		1315	=item $packed_value = $ctx->info ($name)
		1316
		1317	See C<< $platform->info >> for details.
		1318
		1319	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>
		1320
		1321	=for gengetinfo begin context
		1322
		1323	=item $uint = $context->reference_count
		1324
		1325	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_REFERENCE_COUNT> and returns the result.
		1326
		1327	=item @devices = $context->devices
		1328
		1329	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_DEVICES> and returns the result.
		1330
		1331	=item @property_ints = $context->properties
		1332
		1333	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_PROPERTIES> and returns the result.
		1334
		1335	=item $uint = $context->num_devices
		1336
		1337	Calls C<clGetContextInfo> with C<OpenCL::CONTEXT_NUM_DEVICES> and returns the result.
		1338
		1339	=for gengetinfo end context
		1340
420	=back	1341	=back
421		1342
422	=head2 THE OpenCL::Queue CLASS	1343	=head2 THE OpenCL::Queue CLASS
423		1344
424	An OpenCL::Queue represents an execution queue for OpenCL. You execute	1345	An OpenCL::Queue represents an execution queue for OpenCL. You execute
425	requests by calling their respective C<enqueue_xxx> method and waitinf for	1346	requests by calling their respective method and waiting for it to complete
426	it to complete in some way.	1347	in some way.
427		1348
428	All the enqueue methods return an event object that can be used to wait	1349	Most methods that enqueue some request return an event object that can
429	for completion, unless the method is called in void context, in which case	1350	be used to wait for completion (optionally using a callback), unless
430	no event object is created.	1351	the method is called in void context, in which case no event object is
		1352	created.
431		1353
432	They also allow you to specify any number of other event objects that this	1354	They also allow you to specify any number of other event objects that this
433	request has to wait for before it starts executing, by simply passing the	1355	request has to wait for before it starts executing, by simply passing the
434	event objects as extra parameters to the enqueue methods.	1356	event objects as extra parameters to the enqueue methods. To simplify
		1357	program design, this module ignores any C<undef> values in the list of
		1358	events. This makes it possible to code operations such as this, without
		1359	having to put a valid event object into C<$event> first:
		1360
		1361	$event = $queue->xxx (..., $event);
435		1362
436	Queues execute in-order by default, without any parallelism, so in most	1363	Queues execute in-order by default, without any parallelism, so in most
437	cases (i.e. you use only one queue) it's not necessary to wait for or	1364	cases (i.e. you use only one queue) it's not necessary to wait for or
438	create event objects.	1365	create event objects, althoguh an our of order queue is often a bit
		1366	faster.
439		1367
440	=over 4	1368	=over 4
441		1369
442	=item $packed_value = $ctx->info ($name)
443
444	See C<< $platform->info >> for details.
445
446	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetCommandQueueInfo.html>
447
448	=item $ev = $queue->enqueue_read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)	1370	=item $ev = $queue->read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)
449		1371
450	Reads data from buffer into the given string.	1372	Reads data from buffer into the given string.
451		1373
452	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>	1374	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>
453		1375
454	=item $ev = $queue->enqueue_write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)	1376	=item $ev = $queue->write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)
455		1377
456	Writes data to buffer from the given string.	1378	Writes data to buffer from the given string.
457		1379
458	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>	1380	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>
459		1381
460	=item $ev = $queue->enqueue_copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)	1382	=item $ev = $queue->copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)
461		1383
462	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>	1384	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>
463		1385
		1386	=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...)
		1387
		1388	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBufferRect.html
		1389
		1390	=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...)
		1391
		1392	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBufferRect.html
		1393
		1394	=item $ev = $queue->copy_buffer_to_image ($src_buffer, $dst_image, $src_offset, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		1395
		1396	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>
		1397
464	=item $ev = $queue->enqueue_read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)	1398	=item $ev = $queue->read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
		1399
		1400	C<$row_pitch> (and C<$slice_pitch>) can be C<0>, in which case the OpenCL
		1401	module uses the image width (and height) to supply default values.
465		1402
466	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>	1403	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>
467		1404
468	=item $ev = $queue->enqueue_write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $data, $wait_events...)	1405	=item $ev = $queue->write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
469		1406
		1407	C<$row_pitch> (and C<$slice_pitch>) can be C<0>, in which case the OpenCL
		1408	module uses the image width (and height) to supply default values.
470	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>	1409	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>
471		1410
		1411	=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...)
		1412
		1413	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>
		1414
		1415	=item $ev = $queue->copy_image_to_buffer ($src_image, $dst_image, $src_x, $src_y, $src_z, $width, $height, $depth, $dst_offset, $wait_events...)
		1416
		1417	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
		1418
472	=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, 4dst_row_pitch, $dst_slice_pitch, $wait_event...)	1419	=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...)
473		1420
474	Yeah.	1421	Yeah.
475		1422
476	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
477
478	=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...)
479
480	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.	1423	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.
481		1424
482	=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...)	1425	=item $ev = $queue->fill_buffer ($mem, $pattern, $offset, $size, ...)
483		1426
		1427	Fills the given buffer object with repeated applications of C<$pattern>,
		1428	starting at C<$offset> for C<$size> octets.
		1429
		1430	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillBuffer.html>
		1431
		1432	=item $ev = $queue->fill_image ($img, $r, $g, $b, $a, $x, $y, $z, $width, $height, $depth, ...)
		1433
		1434	Fills the given image area with the given rgba colour components. The
		1435	components are normally floating point values between C<0> and C<1>,
		1436	except when the image channel data type is a signe dor unsigned
		1437	unnormalised format, in which case the range is determined by the format.
		1438
484	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>	1439	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillImage.html>
485		1440
486	=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...)
487
488	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
489
490	=item $ev = $queue->enqueue_task ($kernel, $wait_events...)	1441	=item $ev = $queue->task ($kernel, $wait_events...)
491		1442
492	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>	1443	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>
493		1444
494	=item $ev = $queue->enqueue_nd_range_kernel ($kernel, @$global_work_offset, @$global_work_size, @$local_work_size, $wait_events...)	1445	=item $ev = $queue->nd_range_kernel ($kernel, \@global_work_offset, \@global_work_size, \@local_work_size, $wait_events...)
495		1446
496	Enqueues a kernel execution.	1447	Enqueues a kernel execution.
497		1448
498	@$global_work_size must be specified as a reference to an array of	1449	\@global_work_size must be specified as a reference to an array of
499	integers specifying the work sizes (element counts).	1450	integers specifying the work sizes (element counts).
500		1451
501	@$global_work_offset must be either C<undef> (in which case all offsets	1452	\@global_work_offset must be either C<undef> (in which case all offsets
502	are C<0>), or a reference to an array of work offsets, with the same number	1453	are C<0>), or a reference to an array of work offsets, with the same number
503	of elements as @$global_work_size.	1454	of elements as \@global_work_size.
504		1455
505	@$local_work_size must be either C<undef> (in which case the	1456	\@local_work_size must be either C<undef> (in which case the
506	implementation is supposed to choose good local work sizes), or a	1457	implementation is supposed to choose good local work sizes), or a
507	reference to an array of local work sizes, with the same number of	1458	reference to an array of local work sizes, with the same number of
508	elements as @$global_work_size.	1459	elements as \@global_work_size.
509		1460
510	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>	1461	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>
511		1462
512	=item $ev = $queue->enqueue_marker	1463	=item $ev = $queue->migrate_mem_objects (\@mem_objects, $flags, $wait_events...)
513		1464
		1465	Migrates a number of OpenCL::Memory objects to or from the device.
		1466
		1467	flags: OpenCL::MIGRATE_MEM_OBJECT_HOST, OpenCL::MIGRATE_MEM_OBJECT_CONTENT_UNDEFINED
		1468
		1469	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMigrateMemObjects.html>
		1470
		1471	=item $ev = $queue->acquire_gl_objects ([object, ...], $wait_events...)
		1472
		1473	Enqueues a list (an array-ref of OpenCL::Memory objects) to be acquired
		1474	for subsequent OpenCL usage.
		1475
514	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html>	1476	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueAcquireGLObjects.html>
515		1477
		1478	=item $ev = $queue->release_gl_objects ([object, ...], $wait_events...)
		1479
		1480	Enqueues a list (an array-ref of OpenCL::Memory objects) to be released
		1481	for subsequent OpenGL usage.
		1482
		1483	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReleaseGLObjects.html>
		1484
516	=item $ev = $queue->enqueue_wait_for_events ($wait_events...)	1485	=item $ev = $queue->wait_for_events ($wait_events...)
517		1486
518	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>	1487	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>
519		1488
520	=item $queue->enqueue_barrier	1489	=item $ev = $queue->marker ($wait_events...)
521		1490
		1491	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMarkerWithWaitList.html>
		1492
		1493	=item $ev = $queue->barrier ($wait_events...)
		1494
522	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueBarrier.html>	1495	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueBarrierWithWaitList.html>
523		1496
524	=item $queue->flush	1497	=item $queue->flush
525		1498
526	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>	1499	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>
527		1500
528	=item $queue->finish	1501	=item $queue->finish
529		1502
530	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFinish.html>	1503	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFinish.html>
531		1504
		1505	=item $packed_value = $queue->info ($name)
		1506
		1507	See C<< $platform->info >> for details.
		1508
		1509	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetCommandQueueInfo.html>
		1510
		1511	=for gengetinfo begin command_queue
		1512
		1513	=item $ctx = $command_queue->context
		1514
		1515	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_CONTEXT> and returns the result.
		1516
		1517	=item $device = $command_queue->device
		1518
		1519	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_DEVICE> and returns the result.
		1520
		1521	=item $uint = $command_queue->reference_count
		1522
		1523	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_REFERENCE_COUNT> and returns the result.
		1524
		1525	=item $command_queue_properties = $command_queue->properties
		1526
		1527	Calls C<clGetCommandQueueInfo> with C<OpenCL::QUEUE_PROPERTIES> and returns the result.
		1528
		1529	=for gengetinfo end command_queue
		1530
532	=back	1531	=back
533		1532
		1533	=head3 MEMORY MAPPED BUFFERS
		1534
		1535	OpenCL allows you to map buffers and images to host memory (read: perl
		1536	scalars). This is done much like reading or copying a buffer, by enqueuing
		1537	a map or unmap operation on the command queue.
		1538
		1539	The map operations return an C<OpenCL::Mapped> object - see L<THE
		1540	OpenCL::Mapped CLASS> section for details on what to do with these
		1541	objects.
		1542
		1543	The object will be unmapped automatically when the mapped object is
		1544	destroyed (you can use a barrier to make sure the unmap has finished,
		1545	before using the buffer in a kernel), but you can also enqueue an unmap
		1546	operation manually.
		1547
		1548	=over 4
		1549
		1550	=item $mapped_buffer = $queue->map_buffer ($buf, $blocking=1, $map_flags=OpenCL::MAP_READ|OpenCL::MAP_WRITE, $offset=0, $size=undef, $wait_events...)
		1551
		1552	Maps the given buffer into host memory and returns an
		1553	C<OpenCL::MappedBuffer> object. If C<$size> is specified as undef, then
		1554	the map will extend to the end of the buffer.
		1555
		1556	map_flags: OpenCL::MAP_READ, OpenCL::MAP_WRITE, OpenCL::MAP_WRITE_INVALIDATE_REGION.
		1557
		1558	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapBuffer.html>
		1559
		1560	Example: map the buffer $buf fully and replace the first 4 bytes by "abcd", then unmap.
		1561
		1562	{
		1563	my $mapped = $queue->map_buffer ($buf, 1, OpenCL::MAP_WRITE);
		1564	substr $$mapped, 0, 4, "abcd";
		1565	} # asynchronously unmap because $mapped is destroyed
		1566
		1567	=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...)
		1568
		1569	Maps the given image area into host memory and return an
		1570	C<OpenCL::MappedImage> object.
		1571
		1572	If any of C<$width>, C<$height> and/or C<$depth> are C<undef> then they
		1573	will be replaced by the maximum possible value.
		1574
		1575	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapImage.html>
		1576
		1577	Example: map an image (with OpenCL::UNSIGNED_INT8 channel type) and set
		1578	the first channel of the leftmost column to 5, then explicitly unmap
		1579	it. You are not necessarily meant to do it this way, this example just
		1580	shows you the accessors to use :)
		1581
		1582	my $mapped = $queue->map_image ($image, 1, OpenCL::MAP_WRITE);
		1583
		1584	$mapped->set ($_ * $mapped->row_pitch, pack "C", 5)
		1585	for 0..$image->height;
		1586
		1587	$mapped->unmap;.
		1588	$mapped->wait; # only needed for out of order queues normally
		1589
		1590	=item $ev = $queue->unmap ($mapped, $wait_events...)
		1591
		1592	Unmaps the data from host memory. You must not call any methods that
		1593	modify the data, or modify the data scalar directly, after calling this
		1594	method.
		1595
		1596	The mapped event object will always be passed as part of the
		1597	$wait_events. The mapped event object will be replaced by the new event
		1598	object that this request creates.
		1599
		1600	=back
		1601
534	=head2 THE OpenCL::Memory CLASS	1602	=head2 THE OpenCL::Memory CLASS
535		1603
536	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,	1604	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,
537	OpenCL::Image2D and OpenCL::Image3D. The subclasses of this class	1605	OpenCL::Image2D and OpenCL::Image3D.
538	currently only exist to allow type-checking.
539		1606
540	=over 4	1607	=over 4
541		1608
542	=item $packed_value = $memory->info ($name)	1609	=item $packed_value = $memory->info ($name)
543		1610
544	See C<< $platform->info >> for details.	1611	See C<< $platform->info >> for details.
545		1612
546	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>	1613	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>
547		1614
		1615	=for gengetinfo begin mem
		1616
		1617	=item $mem_object_type = $mem->type
		1618
		1619	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_TYPE> and returns the result.
		1620
		1621	=item $mem_flags = $mem->flags
		1622
		1623	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_FLAGS> and returns the result.
		1624
		1625	=item $int = $mem->size
		1626
		1627	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_SIZE> and returns the result.
		1628
		1629	=item $ptr_value = $mem->host_ptr
		1630
		1631	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_HOST_PTR> and returns the result.
		1632
		1633	=item $uint = $mem->map_count
		1634
		1635	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_MAP_COUNT> and returns the result.
		1636
		1637	=item $uint = $mem->reference_count
		1638
		1639	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_REFERENCE_COUNT> and returns the result.
		1640
		1641	=item $ctx = $mem->context
		1642
		1643	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_CONTEXT> and returns the result.
		1644
		1645	=item $mem = $mem->associated_memobject
		1646
		1647	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_ASSOCIATED_MEMOBJECT> and returns the result.
		1648
		1649	=item $int = $mem->offset
		1650
		1651	Calls C<clGetMemObjectInfo> with C<OpenCL::MEM_OFFSET> and returns the result.
		1652
		1653	=for gengetinfo end mem
		1654
		1655	=item ($type, $name) = $mem->gl_object_info
		1656
		1657	Returns the OpenGL object type (e.g. OpenCL::GL_OBJECT_TEXTURE2D) and the
		1658	object "name" (e.g. the texture name) used to create this memory object.
		1659
		1660	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetGLObjectInfo.html>
		1661
548	=back	1662	=back
549		1663
		1664	=head2 THE OpenCL::Buffer CLASS
		1665
		1666	This is a subclass of OpenCL::Memory, and the superclass of
		1667	OpenCL::BufferObj. Its purpose is simply to distinguish between buffers
		1668	and sub-buffers.
		1669
		1670	=head2 THE OpenCL::BufferObj CLASS
		1671
		1672	This is a subclass of OpenCL::Buffer and thus OpenCL::Memory. It exists
		1673	because one cna create sub buffers of OpenLC::BufferObj objects, but not
		1674	sub buffers from these sub buffers.
		1675
		1676	=over 4
		1677
		1678	=item $subbuf = $buf_obj->sub_buffer_region ($flags, $origin, $size)
		1679
		1680	Creates an OpenCL::Buffer objects from this buffer and returns it. The
		1681	C<buffer_create_type> is assumed to be C<CL_BUFFER_CREATE_TYPE_REGION>.
		1682
		1683	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSubBuffer.html>
		1684
		1685	=back
		1686
		1687	=head2 THE OpenCL::Image CLASS
		1688
		1689	This is the superclass of all image objects - OpenCL::Image1D,
		1690	OpenCL::Image1DArray, OpenCL::Image1DBuffer, OpenCL::Image2D,
		1691	OpenCL::Image2DArray and OpenCL::Image3D.
		1692
		1693	=over 4
		1694
		1695	=item $packed_value = $image->image_info ($name)
		1696
		1697	See C<< $platform->info >> for details.
		1698
		1699	The reason this method is not called C<info> is that there already is an
		1700	C<< ->info >> method inherited from C<OpenCL::Memory>.
		1701
		1702	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>
		1703
		1704	=item ($channel_order, $channel_data_type) = $image->format
		1705
		1706	Returns the channel order and type used to create the image by calling
		1707	C<clGetImageInfo> with C<CL_IMAGE_FORMAT>.
		1708
		1709	=for gengetinfo begin image
		1710
		1711	=item $int = $image->element_size
		1712
		1713	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_ELEMENT_SIZE> and returns the result.
		1714
		1715	=item $int = $image->row_pitch
		1716
		1717	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_ROW_PITCH> and returns the result.
		1718
		1719	=item $int = $image->slice_pitch
		1720
		1721	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_SLICE_PITCH> and returns the result.
		1722
		1723	=item $int = $image->width
		1724
		1725	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_WIDTH> and returns the result.
		1726
		1727	=item $int = $image->height
		1728
		1729	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_HEIGHT> and returns the result.
		1730
		1731	=item $int = $image->depth
		1732
		1733	Calls C<clGetImageInfo> with C<OpenCL::IMAGE_DEPTH> and returns the result.
		1734
		1735	=for gengetinfo end image
		1736
		1737	=for gengetinfo begin gl_texture
		1738
		1739	=item $GLenum = $gl_texture->target
		1740
		1741	Calls C<clGetGLTextureInfo> with C<OpenCL::GL_TEXTURE_TARGET> and returns the result.
		1742
		1743	=item $GLint = $gl_texture->gl_mipmap_level
		1744
		1745	Calls C<clGetGLTextureInfo> with C<OpenCL::GL_MIPMAP_LEVEL> and returns the result.
		1746
		1747	=for gengetinfo end gl_texture
		1748
		1749	=back
		1750
550	=head2 THE OpenCL::Sampler CLASS	1751	=head2 THE OpenCL::Sampler CLASS
551		1752
552	=over 4	1753	=over 4
553		1754
554	=item $packed_value = $sampler->info ($name)	1755	=item $packed_value = $sampler->info ($name)
555		1756
556	See C<< $platform->info >> for details.	1757	See C<< $platform->info >> for details.
557		1758
558	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetSamplerInfo.html>	1759	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetSamplerInfo.html>
559		1760
		1761	=for gengetinfo begin sampler
		1762
		1763	=item $uint = $sampler->reference_count
		1764
		1765	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_REFERENCE_COUNT> and returns the result.
		1766
		1767	=item $ctx = $sampler->context
		1768
		1769	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_CONTEXT> and returns the result.
		1770
		1771	=item $addressing_mode = $sampler->normalized_coords
		1772
		1773	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_NORMALIZED_COORDS> and returns the result.
		1774
		1775	=item $filter_mode = $sampler->addressing_mode
		1776
		1777	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_ADDRESSING_MODE> and returns the result.
		1778
		1779	=item $boolean = $sampler->filter_mode
		1780
		1781	Calls C<clGetSamplerInfo> with C<OpenCL::SAMPLER_FILTER_MODE> and returns the result.
		1782
		1783	=for gengetinfo end sampler
		1784
560	=back	1785	=back
561		1786
562	=head2 THE OpenCL::Program CLASS	1787	=head2 THE OpenCL::Program CLASS
563		1788
564	=over 4	1789	=over 4
565		1790
566	=item $packed_value = $program->info ($name)	1791	=item $program->build (\@devices = undef, $options = "", $cb->($program) = undef)
567		1792
568	See C<< $platform->info >> for details.
569
570	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
571
572	=item $program->build ($device, $options = "")
573
574	Tries to build the program with the givne options.	1793	Tries to build the program with the given options. See also the
		1794	C<$ctx->build> convenience function.
		1795
		1796	If a callback is specified, then it will be called when compilation is
		1797	finished. Note that many OpenCL implementations block your program while
		1798	compiling whether you use a callback or not. See C<build_async> if you
		1799	want to make sure the build is done in the background.
		1800
		1801	Note that some OpenCL implementations act up badly, and don't call the
		1802	callback in some error cases (but call it in others). This implementation
		1803	assumes the callback will always be called, and leaks memory if this is
		1804	not so. So best make sure you don't pass in invalid values.
		1805
		1806	Some implementations fail with C<OpenCL::INVALID_BINARY> when the
		1807	compilation state is successful but some later stage fails.
		1808
		1809	options: C<-D name>, C<-D name=definition>, C<-I dir>,
		1810	C<-cl-single-precision-constant>, C<-cl-denorms-are-zero>,
		1811	C<-cl-fp32-correctly-rounded-divide-sqrt>, C<-cl-opt-disable>,
		1812	C<-cl-mad-enable>, C<-cl-no-signed-zeros>, C<-cl-unsafe-math-optimizations>,
		1813	C<-cl-finite-math-only>, C<-cl-fast-relaxed-math>,
		1814	C<-w>, C<-Werror>, C<-cl-std=CL1.1/CL1.2>, C<-cl-kernel-arg-info>,
		1815	C<-create-library>, C<-enable-link-options>.
		1816
		1817	build_status: OpenCL::BUILD_SUCCESS, OpenCL::BUILD_NONE,
		1818	OpenCL::BUILD_ERROR, OpenCL::BUILD_IN_PROGRESS.
575		1819
576	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>	1820	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>
		1821
		1822	=item $program->build_async (\@devices = undef, $options = "", $cb->($program) = undef)
		1823
		1824	Similar to C<< ->build >>, except it starts a thread, and never fails (you
		1825	need to check the compilation status form the callback, or by polling).
		1826
		1827	=item $program->compile (\@devices = undef, $options = "", \%headers = undef, $cb->($program) = undef)
		1828
		1829	Compiles the given program for the given devices (or all devices if
		1830	undef). If C<$headers> is given, it must be a hashref with include name =>
		1831	OpenCL::Program pairs.
		1832
		1833	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCompileProgram.html>
577		1834
578	=item $packed_value = $program->build_info ($device, $name)	1835	=item $packed_value = $program->build_info ($device, $name)
579		1836
580	Similar to C<< $platform->info >>, but returns build info for a previous	1837	Similar to C<< $platform->info >>, but returns build info for a previous
581	build attempt for the given device.	1838	build attempt for the given device.
…		…
587	Creates an OpenCL::Kernel object out of the named C<__kernel> function in	1844	Creates an OpenCL::Kernel object out of the named C<__kernel> function in
588	the program.	1845	the program.
589		1846
590	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>	1847	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>
591		1848
		1849	=item @kernels = $program->kernels_in_program
		1850
		1851	Returns all kernels successfully compiled for all devices in program.
		1852
		1853	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernelsInProgram.html
		1854
		1855	=for gengetinfo begin program_build
		1856
		1857	=item $build_status = $program->build_status ($device)
		1858
		1859	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_STATUS> and returns the result.
		1860
		1861	=item $string = $program->build_options ($device)
		1862
		1863	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_OPTIONS> and returns the result.
		1864
		1865	=item $string = $program->build_log ($device)
		1866
		1867	Calls C<clGetProgramBuildInfo> with C<OpenCL::PROGRAM_BUILD_LOG> and returns the result.
		1868
		1869	=for gengetinfo end program_build
		1870
		1871	=item $packed_value = $program->info ($name)
		1872
		1873	See C<< $platform->info >> for details.
		1874
		1875	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1876
		1877	=for gengetinfo begin program
		1878
		1879	=item $uint = $program->reference_count
		1880
		1881	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_REFERENCE_COUNT> and returns the result.
		1882
		1883	=item $ctx = $program->context
		1884
		1885	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_CONTEXT> and returns the result.
		1886
		1887	=item $uint = $program->num_devices
		1888
		1889	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_NUM_DEVICES> and returns the result.
		1890
		1891	=item @devices = $program->devices
		1892
		1893	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_DEVICES> and returns the result.
		1894
		1895	=item $string = $program->source
		1896
		1897	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_SOURCE> and returns the result.
		1898
		1899	=item @ints = $program->binary_sizes
		1900
		1901	Calls C<clGetProgramInfo> with C<OpenCL::PROGRAM_BINARY_SIZES> and returns the result.
		1902
		1903	=for gengetinfo end program
		1904
		1905	=item @blobs = $program->binaries
		1906
		1907	Returns a string for the compiled binary for every device associated with
		1908	the program, empty strings indicate missing programs, and an empty result
		1909	means no program binaries are available.
		1910
		1911	These "binaries" are often, in fact, informative low-level assembly
		1912	sources.
		1913
		1914	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1915
592	=back	1916	=back
593		1917
594	=head2 THE OpenCL::Kernel CLASS	1918	=head2 THE OpenCL::Kernel CLASS
595		1919
596	=over 4	1920	=over 4
…		…
599		1923
600	See C<< $platform->info >> for details.	1924	See C<< $platform->info >> for details.
601		1925
602	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelInfo.html>	1926	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelInfo.html>
603		1927
		1928	=for gengetinfo begin kernel
		1929
		1930	=item $string = $kernel->function_name
		1931
		1932	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_FUNCTION_NAME> and returns the result.
		1933
		1934	=item $uint = $kernel->num_args
		1935
		1936	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_NUM_ARGS> and returns the result.
		1937
		1938	=item $uint = $kernel->reference_count
		1939
		1940	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_REFERENCE_COUNT> and returns the result.
		1941
		1942	=item $ctx = $kernel->context
		1943
		1944	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_CONTEXT> and returns the result.
		1945
		1946	=item $program = $kernel->program
		1947
		1948	Calls C<clGetKernelInfo> with C<OpenCL::KERNEL_PROGRAM> and returns the result.
		1949
		1950	=for gengetinfo end kernel
		1951
		1952	=item $packed_value = $kernel->work_group_info ($device, $name)
		1953
		1954	See C<< $platform->info >> for details.
		1955
		1956	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
		1957
		1958	=for gengetinfo begin kernel_work_group
		1959
		1960	=item $int = $kernel->work_group_size ($device)
		1961
		1962	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_WORK_GROUP_SIZE> and returns the result.
		1963
		1964	=item @ints = $kernel->compile_work_group_size ($device)
		1965
		1966	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result.
		1967
		1968	=item $ulong = $kernel->local_mem_size ($device)
		1969
		1970	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_LOCAL_MEM_SIZE> and returns the result.
		1971
		1972	=item $int = $kernel->preferred_work_group_size_multiple ($device)
		1973
		1974	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result.
		1975
		1976	=item $ulong = $kernel->private_mem_size ($device)
		1977
		1978	Calls C<clGetKernelWorkGroupInfo> with C<OpenCL::KERNEL_PRIVATE_MEM_SIZE> and returns the result.
		1979
		1980	=for gengetinfo end kernel_work_group
		1981
		1982	=item $packed_value = $kernel->arg_info ($idx, $name)
		1983
		1984	See C<< $platform->info >> for details.
		1985
		1986	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clGetKernelArgInfo.html>
		1987
		1988	=for gengetinfo begin kernel_arg
		1989
		1990	=item $kernel_arg_address_qualifier = $kernel->arg_address_qualifier ($idx)
		1991
		1992	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_ADDRESS_QUALIFIER> and returns the result.
		1993
		1994	=item $kernel_arg_access_qualifier = $kernel->arg_access_qualifier ($idx)
		1995
		1996	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_ACCESS_QUALIFIER> and returns the result.
		1997
		1998	=item $string = $kernel->arg_type_name ($idx)
		1999
		2000	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_TYPE_NAME> and returns the result.
		2001
		2002	=item $kernel_arg_type_qualifier = $kernel->arg_type_qualifier ($idx)
		2003
		2004	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_TYPE_QUALIFIER> and returns the result.
		2005
		2006	=item $string = $kernel->arg_name ($idx)
		2007
		2008	Calls C<clGetKernelArgInfo> with C<OpenCL::KERNEL_ARG_NAME> and returns the result.
		2009
		2010	=for gengetinfo end kernel_arg
		2011
		2012	=item $kernel->setf ($format, ...)
		2013
		2014	Sets the arguments of a kernel. Since OpenCL 1.1 doesn't have a generic
		2015	way to set arguments (and with OpenCL 1.2 it might be rather slow), you
		2016	need to specify a format argument, much as with C<printf>, to tell OpenCL
		2017	what type of argument it is.
		2018
		2019	The format arguments are single letters:
		2020
		2021	c char
		2022	C unsigned char
		2023	s short
		2024	S unsigned short
		2025	i int
		2026	I unsigned int
		2027	l long
		2028	L unsigned long
		2029
		2030	h half float (0..65535)
		2031	f float
		2032	d double
		2033
		2034	z local (octet size)
		2035
		2036	m memory object (buffer or image)
		2037	a sampler
		2038	e event
		2039
		2040	Space characters in the format string are ignored.
		2041
		2042	Example: set the arguments for a kernel that expects an int, two floats, a buffer and an image.
		2043
		2044	$kernel->setf ("i ff mm", 5, 0.5, 3, $buffer, $image);
		2045
604	=item $kernel->set_TYPE ($index, $value)	2046	=item $kernel->set_TYPE ($index, $value)
605		2047
		2048	=item $kernel->set_char ($index, $value)
		2049
		2050	=item $kernel->set_uchar ($index, $value)
		2051
		2052	=item $kernel->set_short ($index, $value)
		2053
		2054	=item $kernel->set_ushort ($index, $value)
		2055
		2056	=item $kernel->set_int ($index, $value)
		2057
		2058	=item $kernel->set_uint ($index, $value)
		2059
		2060	=item $kernel->set_long ($index, $value)
		2061
		2062	=item $kernel->set_ulong ($index, $value)
		2063
		2064	=item $kernel->set_half ($index, $value)
		2065
		2066	=item $kernel->set_float ($index, $value)
		2067
		2068	=item $kernel->set_double ($index, $value)
		2069
		2070	=item $kernel->set_memory ($index, $value)
		2071
		2072	=item $kernel->set_buffer ($index, $value)
		2073
		2074	=item $kernel->set_image ($index, $value)
		2075
		2076	=item $kernel->set_sampler ($index, $value)
		2077
		2078	=item $kernel->set_local ($index, $value)
		2079
		2080	=item $kernel->set_event ($index, $value)
		2081
606	This is a family of methods to set the kernel argument with the number C<$index> to the give C<$value>.	2082	This is a family of methods to set the kernel argument with the number
607		2083	C<$index> to the give C<$value>.
608	TYPE is one of C<char>, C<uchar>, C<short>, C<ushort>, C<int>, C<uint>,
609	C<long>, C<ulong>, C<half>, C<float>, C<double>, C<memory>, C<buffer>,
610	C<image2d>, C<image3d>, C<sampler> or C<event>.
611		2084
612	Chars and integers (including the half type) are specified as integers,	2085	Chars and integers (including the half type) are specified as integers,
613	float and double as floating point values, memory/buffer/image2d/image3d	2086	float and double as floating point values, memory/buffer/image must be
614	must be an object of that type or C<undef>, and sampler and event must be	2087	an object of that type or C<undef>, local-memory arguments are set by
615	objects of that type.	2088	specifying the size, and sampler and event must be objects of that type.
		2089
		2090	Note that C<set_memory> works for all memory objects (all types of buffers
		2091	and images) - the main purpose of the more specific C<set_TYPE> functions
		2092	is type checking.
		2093
		2094	Setting an argument for a kernel does NOT keep a reference to the object -
		2095	for example, if you set an argument to some image object, free the image,
		2096	and call the kernel, you will run into undefined behaviour.
616		2097
617	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>	2098	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>
618		2099
619	=back	2100	=back
620		2101
…		…
623	This is the superclass for all event objects (including OpenCL::UserEvent	2104	This is the superclass for all event objects (including OpenCL::UserEvent
624	objects).	2105	objects).
625		2106
626	=over 4	2107	=over 4
627		2108
		2109	=item $ev->wait
		2110
		2111	Waits for the event to complete.
		2112
		2113	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
		2114
		2115	=item $ev->cb ($exec_callback_type, $callback->($event, $event_command_exec_status))
		2116
		2117	Adds a callback to the callback stack for the given event type. There is
		2118	no way to remove a callback again.
		2119
		2120	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetEventCallback.html>
		2121
628	=item $packed_value = $ev->info ($name)	2122	=item $packed_value = $ev->info ($name)
629		2123
630	See C<< $platform->info >> for details.	2124	See C<< $platform->info >> for details.
631		2125
632	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>	2126	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
633		2127
634	=item $ev->wait	2128	=for gengetinfo begin event
635		2129
636	Waits for the event to complete.	2130	=item $queue = $event->command_queue
637		2131
		2132	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_QUEUE> and returns the result.
		2133
		2134	=item $command_type = $event->command_type
		2135
		2136	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_TYPE> and returns the result.
		2137
		2138	=item $uint = $event->reference_count
		2139
		2140	Calls C<clGetEventInfo> with C<OpenCL::EVENT_REFERENCE_COUNT> and returns the result.
		2141
		2142	=item $uint = $event->command_execution_status
		2143
		2144	Calls C<clGetEventInfo> with C<OpenCL::EVENT_COMMAND_EXECUTION_STATUS> and returns the result.
		2145
		2146	=item $ctx = $event->context
		2147
		2148	Calls C<clGetEventInfo> with C<OpenCL::EVENT_CONTEXT> and returns the result.
		2149
		2150	=for gengetinfo end event
		2151
		2152	=item $packed_value = $ev->profiling_info ($name)
		2153
		2154	See C<< $platform->info >> for details.
		2155
		2156	The reason this method is not called C<info> is that there already is an
		2157	C<< ->info >> method.
		2158
638	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	2159	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
		2160
		2161	=for gengetinfo begin profiling
		2162
		2163	=item $ulong = $event->profiling_command_queued
		2164
		2165	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_QUEUED> and returns the result.
		2166
		2167	=item $ulong = $event->profiling_command_submit
		2168
		2169	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_SUBMIT> and returns the result.
		2170
		2171	=item $ulong = $event->profiling_command_start
		2172
		2173	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_START> and returns the result.
		2174
		2175	=item $ulong = $event->profiling_command_end
		2176
		2177	Calls C<clGetEventProfilingInfo> with C<OpenCL::PROFILING_COMMAND_END> and returns the result.
		2178
		2179	=for gengetinfo end profiling
639		2180
640	=back	2181	=back
641		2182
642	=head2 THE OpenCL::UserEvent CLASS	2183	=head2 THE OpenCL::UserEvent CLASS
643		2184
…		…
645		2186
646	=over 4	2187	=over 4
647		2188
648	=item $ev->set_status ($execution_status)	2189	=item $ev->set_status ($execution_status)
649		2190
		2191	Sets the execution status of the user event. Can only be called once,
		2192	either with OpenCL::COMPLETE or a negative number as status.
		2193
		2194	execution_status: OpenCL::COMPLETE or a negative integer.
		2195
650	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>	2196	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>
651		2197
652	=back	2198	=back
653		2199
		2200	=head2 THE OpenCL::Mapped CLASS
		2201
		2202	This class represents objects mapped into host memory. They are
		2203	represented by a blessed string scalar. The string data is the mapped
		2204	memory area, that is, if you read or write it, then the mapped object is
		2205	accessed directly.
		2206
		2207	You must only ever use operations that modify the string in-place - for
		2208	example, a C<substr> that doesn't change the length, or maybe a regex that
		2209	doesn't change the length. Any other operation might cause the data to be
		2210	copied.
		2211
		2212	When the object is destroyed it will enqueue an implicit unmap operation
		2213	on the queue that was used to create it.
		2214
		2215	Keep in mind that you I<need> to unmap (or destroy) mapped objects before
		2216	OpenCL sees the changes, even if some implementations don't need this
		2217	sometimes.
		2218
		2219	Example, replace the first two floats in the mapped buffer by 1 and 2.
		2220
		2221	my $mapped = $queue->map_buffer ($buf, ...
		2222	$mapped->event->wait; # make sure it's there
		2223
		2224	# now replace first 8 bytes by new data, which is exactly 8 bytes long
		2225	# we blindly assume device endianness to equal host endianness
		2226	# (and of course, we assume iee 754 single precision floats :)
		2227	substr $$mapped, 0, 8, pack "f*", 1, 2;
		2228
		2229	=over 4
		2230
		2231	=item $ev = $mapped->unmap ($wait_events...)
		2232
		2233	Unmaps the mapped memory object, using the queue originally used to create
		2234	it, quite similarly to C<< $queue->unmap ($mapped, ...) >>.
		2235
		2236	=item $bool = $mapped->mapped
		2237
		2238	Returns whether the object is still mapped - true before an C<unmap> is
		2239	enqueued, false afterwards.
		2240
		2241	=item $ev = $mapped->event
		2242
		2243	Return the event object associated with the mapped object. Initially, this
		2244	will be the event object created when mapping the object, and after an
		2245	unmap, this will be the event object that the unmap operation created.
		2246
		2247	=item $mapped->wait
		2248
		2249	Same as C<< $mapped->event->wait >> - makes sure no operations on this
		2250	mapped object are outstanding.
		2251
		2252	=item $bytes = $mapped->size
		2253
		2254	Returns the size of the mapped area, in bytes. Same as C<length $$mapped>.
		2255
		2256	=item $ptr = $mapped->ptr
		2257
		2258	Returns the raw memory address of the mapped area.
		2259
		2260	=item $mapped->set ($offset, $data)
		2261
		2262	Replaces the data at the given C<$offset> in the memory area by the new
		2263	C<$data>. This method is safer than direct manipulation of C<$mapped>
		2264	because it does bounds-checking, but also slower.
		2265
		2266	=item $data = $mapped->get ($offset, $length)
		2267
		2268	Returns (without copying) a scalar representing the data at the given
		2269	C<$offset> and C<$length> in the mapped memory area. This is the same as
		2270	the following substr, except much slower;
		2271
		2272	$data = substr $$mapped, $offset, $length
		2273
654	=cut	2274	=cut
655		2275
656	package OpenCL;	2276	sub OpenCL::Mapped::get {
657		2277	substr ${$_[0]}, $_[1], $_[2]
658	use common::sense;
659
660	BEGIN {
661	our $VERSION = '0.14';
662
663	require XSLoader;
664	XSLoader::load (__PACKAGE__, $VERSION);
665
666	@OpenCL::Buffer::ISA =
667	@OpenCL::Image::ISA = OpenCL::Memory::;
668
669	@OpenCL::Image2D::ISA =
670	@OpenCL::Image3D::ISA = OpenCL::Image::;
671
672	@OpenCL::UserEvent::ISA = OpenCL::Event::;
673	}	2278	}
		2279
		2280	=back
		2281
		2282	=head2 THE OpenCL::MappedBuffer CLASS
		2283
		2284	This is a subclass of OpenCL::Mapped, representing mapped buffers.
		2285
		2286	=head2 THE OpenCL::MappedImage CLASS
		2287
		2288	This is a subclass of OpenCL::Mapped, representing mapped images.
		2289
		2290	=over 4
		2291
		2292	=item $bytes = $mapped->row_pitch
		2293
		2294	=item $bytes = $mapped->slice_pitch
		2295
		2296	Return the row or slice pitch of the image that has been mapped.
		2297
		2298	=back
		2299
		2300
		2301	=cut
674		2302
675	1;	2303	1;
676		2304
677	=head1 AUTHOR	2305	=head1 AUTHOR
678		2306

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