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210 | # enqueue an async read |
210 | # enqueue an async read |
211 | $ev = $queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev); |
211 | $ev = $queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev); |
212 | |
212 | |
213 | # wait for the last event to complete |
213 | # wait for the last event to complete |
214 | $ev->wait; |
214 | $ev->wait; |
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215 | |
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216 | =head2 Use the OpenGL module to share a texture between OpenCL and OpenGL and draw some julia |
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217 | set tunnel effect. |
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218 | |
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219 | This is quite a long example to get you going. |
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220 | |
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221 | use OpenGL ":all"; |
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222 | use OpenCL; |
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223 | |
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224 | # open a window and create a gl texture |
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225 | OpenGL::glpOpenWindow width => 256, height => 256; |
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226 | my $texid = glGenTextures_p 1; |
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227 | glBindTexture GL_TEXTURE_2D, $texid; |
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228 | glTexImage2D_c GL_TEXTURE_2D, 0, GL_RGBA8, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0; |
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229 | |
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230 | # find and use the first opencl device that let's us get a shared opengl context |
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231 | my $platform; |
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232 | my $dev; |
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233 | my $ctx; |
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234 | |
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235 | for (OpenCL::platforms) { |
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236 | $platform = $_; |
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237 | for ($platform->devices) { |
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238 | $dev = $_; |
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239 | $ctx = $platform->context ([OpenCL::GLX_DISPLAY_KHR, undef, OpenCL::GL_CONTEXT_KHR, undef], [$dev]) |
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240 | and last; |
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241 | } |
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242 | } |
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243 | |
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244 | $ctx |
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245 | or die "cannot find suitable OpenCL device\n"; |
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246 | |
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247 | my $queue = $ctx->queue ($dev); |
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248 | |
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249 | # now attach an opencl image2d object to the opengl texture |
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250 | my $tex = $ctx->gl_texture2d (OpenCL::MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, $texid); |
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251 | |
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252 | # now the boring opencl code |
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253 | my $src = <<EOF; |
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254 | kernel void |
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255 | juliatunnel (write_only image2d_t img, float time) |
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256 | { |
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257 | float2 p = (float2)(get_global_id (0), get_global_id (1)) / 256.f * 2.f - 1.f; |
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258 | |
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259 | float2 m = (float2)(1.f, p.y) / fabs (p.x); |
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260 | m.x = fabs (fmod (m.x + time * 0.05f, 4.f)) - 2.f; |
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261 | |
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262 | float2 z = m; |
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263 | float2 c = (float2)(sin (time * 0.05005), cos (time * 0.06001)); |
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264 | |
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265 | for (int i = 0; i < 100 && dot (z, z) < 4.f; ++i) |
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266 | z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c; |
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267 | |
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268 | float3 colour = (float3)(z.x, z.y, z.x * z.y); |
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269 | write_imagef (img, (int2)(get_global_id (0), get_global_id (1)), (float4)(colour * p.x * p.x, 1.)); |
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270 | } |
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271 | EOF |
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272 | my $prog = $ctx->program_with_source ($src); |
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273 | eval { $prog->build ($dev); 1 } |
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274 | or die $prog->build_log ($dev); |
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275 | |
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276 | my $kernel = $prog->kernel ("juliatunnel"); |
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277 | |
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278 | # program compiled, kernel ready, now draw and loop |
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279 | |
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280 | for (my $time; ; ++$time) { |
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281 | # acquire objects from opengl |
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282 | $queue->enqueue_acquire_gl_objects ([$tex]); |
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283 | |
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284 | # configure and run our kernel |
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|
285 | $kernel->set_image2d (0, $tex); |
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286 | $kernel->set_float (1, $time); |
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287 | $queue->enqueue_nd_range_kernel ($kernel, undef, [256, 256], undef); |
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288 | |
|
|
289 | # release objects to opengl again |
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290 | $queue->enqueue_release_gl_objects ([$tex]); |
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291 | |
|
|
292 | # wait |
|
|
293 | $queue->flush; |
|
|
294 | |
|
|
295 | # now draw the texture, the defaults should be all right |
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|
296 | glTexParameterf GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST; |
|
|
297 | |
|
|
298 | glEnable GL_TEXTURE_2D; |
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|
299 | glBegin GL_QUADS; |
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|
300 | glTexCoord2f 0, 1; glVertex3i -1, -1, -1; |
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301 | glTexCoord2f 0, 0; glVertex3i 1, -1, -1; |
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302 | glTexCoord2f 1, 0; glVertex3i 1, 1, -1; |
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303 | glTexCoord2f 1, 1; glVertex3i -1, 1, -1; |
|
|
304 | glEnd; |
|
|
305 | |
|
|
306 | glXSwapBuffers; |
|
|
307 | |
|
|
308 | select undef, undef, undef, 1/60; |
|
|
309 | } |
215 | |
310 | |
216 | =head1 DOCUMENTATION |
311 | =head1 DOCUMENTATION |
217 | |
312 | |
218 | =head2 BASIC CONVENTIONS |
313 | =head2 BASIC CONVENTIONS |
219 | |
314 | |
… | |
… | |
271 | ulong IV - Q |
366 | ulong IV - Q |
272 | float NV float f |
367 | float NV float f |
273 | half IV ushort S |
368 | half IV ushort S |
274 | double NV double d |
369 | double NV double d |
275 | |
370 | |
|
|
371 | =head2 GLX SUPPORT |
|
|
372 | |
|
|
373 | Due to the sad state that OpenGL support is in in Perl (mostly the OpenGL |
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374 | module, which has little to no documentation and has little to no support |
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375 | for glX), this module, as a special extension, treats context creation |
|
|
376 | properties C<OpenCL::GLX_DISPLAY_KHR> and C<OpenCL::GL_CONTEXT_KHR> |
|
|
377 | specially: If either or both of these are C<undef>, then the OpenCL |
|
|
378 | module tries to dynamically resolve C<glXGetCurrentDisplay> and |
|
|
379 | C<glXGetCurrentContext>, call these functions and use their return values |
|
|
380 | instead. |
|
|
381 | |
|
|
382 | For this to work, the OpenGL library must be loaded, a GLX context must |
|
|
383 | have been created and be made current, and C<dlsym> must be available and |
|
|
384 | capable of finding the function via C<RTLD_DEFAULT>. |
|
|
385 | |
276 | =head2 THE OpenCL PACKAGE |
386 | =head2 THE OpenCL PACKAGE |
277 | |
387 | |
278 | =over 4 |
388 | =over 4 |
279 | |
389 | |
280 | =item $int = OpenCL::errno |
390 | =item $int = OpenCL::errno |
… | |
… | |
859 | reference to an array of local work sizes, with the same number of |
969 | reference to an array of local work sizes, with the same number of |
860 | elements as @$global_work_size. |
970 | elements as @$global_work_size. |
861 | |
971 | |
862 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html> |
972 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html> |
863 | |
973 | |
864 | =item $ev = $queue->enqueue_marker |
974 | =item $ev = $queue->enqueue_marker ($wait_events...) |
865 | |
975 | |
866 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html> |
976 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html> |
|
|
977 | |
|
|
978 | =item $ev = $queue->enqueue_acquire_gl_objects ([object, ...], $wait_events...) |
|
|
979 | |
|
|
980 | Enqueues a list (an array-ref of OpenCL::Memory objects) to be acquired |
|
|
981 | for subsequent OpenCL usage. |
|
|
982 | |
|
|
983 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueAcquireGLObjects.html> |
|
|
984 | |
|
|
985 | =item $ev = $queue->enqueue_release_gl_objects ([object, ...], $wait_events...) |
|
|
986 | |
|
|
987 | Enqueues a list (an array-ref of OpenCL::Memory objects) to be released |
|
|
988 | for subsequent OpenGL usage. |
|
|
989 | |
|
|
990 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReleaseGLObjects.html> |
867 | |
991 | |
868 | =item $ev = $queue->enqueue_wait_for_events ($wait_events...) |
992 | =item $ev = $queue->enqueue_wait_for_events ($wait_events...) |
869 | |
993 | |
870 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html> |
994 | L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html> |
871 | |
995 | |
… | |
… | |
1039 | |
1163 | |
1040 | =for gengetinfo begin gl_texture |
1164 | =for gengetinfo begin gl_texture |
1041 | |
1165 | |
1042 | =item $GLenum = $gl_texture->target |
1166 | =item $GLenum = $gl_texture->target |
1043 | |
1167 | |
1044 | Calls C<clGetGlTextureInfo> with C<CL_GL_TEXTURE_TARGET> and returns the result. |
1168 | Calls C<clGetGLTextureInfo> with C<CL_GL_TEXTURE_TARGET> and returns the result. |
1045 | |
1169 | |
1046 | =item $GLint = $gl_texture->gl_mipmap_level |
1170 | =item $GLint = $gl_texture->gl_mipmap_level |
1047 | |
1171 | |
1048 | Calls C<clGetGlTextureInfo> with C<CL_GL_MIPMAP_LEVEL> and returns the result. |
1172 | Calls C<clGetGLTextureInfo> with C<CL_GL_MIPMAP_LEVEL> and returns the result. |
1049 | |
1173 | |
1050 | =for gengetinfo end gl_texture |
1174 | =for gengetinfo end gl_texture |
1051 | |
1175 | |
1052 | =back |
1176 | =back |
1053 | |
1177 | |
… | |
… | |
1349 | package OpenCL; |
1473 | package OpenCL; |
1350 | |
1474 | |
1351 | use common::sense; |
1475 | use common::sense; |
1352 | |
1476 | |
1353 | BEGIN { |
1477 | BEGIN { |
1354 | our $VERSION = '0.92'; |
1478 | our $VERSION = '0.95'; |
1355 | |
1479 | |
1356 | require XSLoader; |
1480 | require XSLoader; |
1357 | XSLoader::load (__PACKAGE__, $VERSION); |
1481 | XSLoader::load (__PACKAGE__, $VERSION); |
1358 | |
1482 | |
1359 | @OpenCL::Buffer::ISA = |
1483 | @OpenCL::Buffer::ISA = |