bool
CLDeviceContext::Initialize() {
#ifdef OPENSUBDIV_HAS_CLEW
if (!clGetPlatformIDs) {
error("Error clGetPlatformIDs function not bound.\n");
return false;
}
#endif
cl_int ciErrNum;
cl_platform_id cpPlatform = findPlatform();
#if defined(_WIN32)
cl_context_properties props[] = {
CL_GL_CONTEXT_KHR, (cl_context_properties)wglGetCurrentContext(),
CL_WGL_HDC_KHR, (cl_context_properties)wglGetCurrentDC(),
CL_CONTEXT_PLATFORM, (cl_context_properties)cpPlatform,
0
};
#elif defined(__APPLE__)
CGLContextObj kCGLContext = CGLGetCurrentContext();
CGLShareGroupObj kCGLShareGroup = CGLGetShareGroup(kCGLContext);
cl_context_properties props[] = {
CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE, (cl_context_properties)kCGLShareGroup,
0
};
#else
cl_context_properties props[] = {
CL_GL_CONTEXT_KHR, (cl_context_properties)glXGetCurrentContext(),
CL_GLX_DISPLAY_KHR, (cl_context_properties)glXGetCurrentDisplay(),
CL_CONTEXT_PLATFORM, (cl_context_properties)cpPlatform,
0
};
#endif
#if defined(__APPLE__)
_clContext = clCreateContext(props, 0, NULL, clLogMessagesToStdoutAPPLE,
NULL, &ciErrNum);
if (ciErrNum != CL_SUCCESS) {
error("Error %d in clCreateContext\n", ciErrNum);
return false;
}
size_t devicesSize = 0;
clGetGLContextInfoAPPLE(_clContext, kCGLContext,
CL_CGL_DEVICES_FOR_SUPPORTED_VIRTUAL_SCREENS_APPLE,
0, NULL, &devicesSize);
int numDevices = int(devicesSize / sizeof(cl_device_id));
if (numDevices == 0) {
error("No sharable devices.\n");
return false;
}
cl_device_id *clDevices = new cl_device_id[numDevices];
clGetGLContextInfoAPPLE(_clContext, kCGLContext,
CL_CGL_DEVICES_FOR_SUPPORTED_VIRTUAL_SCREENS_APPLE,
numDevices * sizeof(cl_device_id), clDevices, NULL);
int clDeviceUsed = 0;
#else // not __APPLE__
// get the number of GPU devices available to the platform
cl_uint numDevices = 0;
clGetDeviceIDs(cpPlatform, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
if (numDevices == 0) {
error("No CL GPU device found.\n");
return false;
}
// create the device list
cl_device_id *clDevices = new cl_device_id[numDevices];
clGetDeviceIDs(cpPlatform, CL_DEVICE_TYPE_GPU, numDevices, clDevices, NULL);
const char *extension = "cl_khr_gl_sharing";
int clDeviceUsed = findExtensionSupportedDevice(clDevices, numDevices,
extension);
if (clDeviceUsed < 0) {
error("No device found that supports CL/GL context sharing\n");
delete[] clDevices;
return false;
}
_clContext = clCreateContext(props, 1, &clDevices[clDeviceUsed],
NULL, NULL, &ciErrNum);
#endif // not __APPLE__
if (ciErrNum != CL_SUCCESS) {
error("Error %d in clCreateContext\n", ciErrNum);
delete[] clDevices;
return false;
}
_clCommandQueue = clCreateCommandQueue(_clContext, clDevices[clDeviceUsed],
0, &ciErrNum);
delete[] clDevices;
if (ciErrNum != CL_SUCCESS) {
error("Error %d in clCreateCommandQueue\n", ciErrNum);
return false;
}
return true;
}
void create_context_on(const char *plat_name, const char*dev_name, cl_uint idx,
cl_context *ctx, cl_command_queue *queue, int enable_profiling)
{
char dev_sel_buf[MAX_NAME_LEN];
char platform_sel_buf[MAX_NAME_LEN];
// get number of platforms
cl_uint plat_count;
CALL_CL_GUARDED(clGetPlatformIDs, (0, NULL, &plat_count));
// allocate memory, get list of platform handles
cl_platform_id *platforms =
(cl_platform_id *) malloc(plat_count*sizeof(cl_platform_id));
CHECK_SYS_ERROR(!platforms, "allocating platform array");
CALL_CL_GUARDED(clGetPlatformIDs, (plat_count, platforms, NULL));
// print menu, if requested
#ifndef CL_HELPER_FORCE_INTERACTIVE
if (plat_name == CHOOSE_INTERACTIVELY) // yes, we want exactly that pointer
#endif
{
puts("Choose platform:");
for (cl_uint i = 0; i < plat_count; ++i)
{
char buf[MAX_NAME_LEN];
CALL_CL_GUARDED(clGetPlatformInfo, (platforms[i], CL_PLATFORM_VENDOR,
sizeof(buf), buf, NULL));
printf("[%d] %s\n", i, buf);
}
printf("Enter choice: ");
fflush(stdout);
char *sel = read_a_line();
if (!sel)
{
fprintf(stderr, "error reading line from stdin");
abort();
}
int sel_int = MIN(MAX(0, atoi(sel)), (int) plat_count-1);
free(sel);
CALL_CL_GUARDED(clGetPlatformInfo, (platforms[sel_int], CL_PLATFORM_VENDOR,
sizeof(platform_sel_buf), platform_sel_buf, NULL));
plat_name = platform_sel_buf;
}
// iterate over platforms
for (cl_uint i = 0; i < plat_count; ++i)
{
// get platform name
char buf[MAX_NAME_LEN];
CALL_CL_GUARDED(clGetPlatformInfo, (platforms[i], CL_PLATFORM_VENDOR,
sizeof(buf), buf, NULL));
// does it match?
if (!plat_name || strstr(buf, plat_name))
{
// get number of devices in platform
cl_uint dev_count;
CALL_CL_GUARDED(clGetDeviceIDs, (platforms[i], CL_DEVICE_TYPE_ALL,
0, NULL, &dev_count));
// allocate memory, get list of device handles in platform
cl_device_id *devices =
(cl_device_id *) malloc(dev_count*sizeof(cl_device_id));
CHECK_SYS_ERROR(!devices, "allocating device array");
CALL_CL_GUARDED(clGetDeviceIDs, (platforms[i], CL_DEVICE_TYPE_ALL,
dev_count, devices, NULL));
// {{{ print device menu, if requested
#ifndef CL_HELPER_FORCE_INTERACTIVE
if (dev_name == CHOOSE_INTERACTIVELY) // yes, we want exactly that pointer
#endif
{
puts("Choose device:");
for (cl_uint j = 0; j < dev_count; ++j)
{
char buf[MAX_NAME_LEN];
CALL_CL_GUARDED(clGetDeviceInfo, (devices[j], CL_DEVICE_NAME,
sizeof(buf), buf, NULL));
printf("[%d] %s\n", j, buf);
}
printf("Enter choice: ");
fflush(stdout);
char *sel = read_a_line();
if (!sel)
{
fprintf(stderr, "error reading line from stdin");
abort();
}
int int_sel = MIN(MAX(0, atoi(sel)), (int) dev_count-1);
free(sel);
CALL_CL_GUARDED(clGetDeviceInfo, (devices[int_sel], CL_DEVICE_NAME,
sizeof(dev_sel_buf), dev_sel_buf, NULL));
dev_name = dev_sel_buf;
}
// }}}
// iterate over devices
for (cl_uint j = 0; j < dev_count; ++j)
{
// get device name
char buf[MAX_NAME_LEN];
CALL_CL_GUARDED(clGetDeviceInfo, (devices[j], CL_DEVICE_NAME,
sizeof(buf), buf, NULL));
// does it match?
if (!dev_name || strstr(buf, dev_name))
{
if (idx == 0)
{
cl_platform_id plat = platforms[i];
cl_device_id dev = devices[j];
free(devices);
free(platforms);
cl_int status;
// create a context
#if OPENCL_SHARE_WITH_OPENGL
#if __APPLE__
// CGLContextObj kCGLContext = CGLGetCurrentContext();
// CGLShareGroupObj kCGLShareGroup = CGLGetShareGroup(kCGLContext);
// cl_context_properties cps[] = {
// CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE, (cl_context_properties)kCGLShareGroup,
// CL_CONTEXT_PLATFORM, (cl_context_properties) plat, 0 };
//
CGLContextObj gl_context = CGLGetCurrentContext();
CGLShareGroupObj share_group = CGLGetShareGroup(gl_context);
cl_context_properties properties[] = {
CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE,
(cl_context_properties)share_group, 0
};
*ctx = clCreateContext(properties, 0, 0, 0, 0, 0);
clGetGLContextInfoAPPLE(*ctx, gl_context,
CL_CGL_DEVICE_FOR_CURRENT_VIRTUAL_SCREEN_APPLE, sizeof(dev),
&dev, NULL);
#elif WIN32
cl_context_properties cps[] = {
CL_GL_CONTEXT_KHR, (cl_context_properties) wglGetCurrentContext(), CL_WGL_HDC_KHR, (cl_context_properties) wglGetCurrentDC(), CL_CONTEXT_PLATFORM, (cl_context_properties) plat, 0};
//Probably won't work because &dev should correspond to glContext
*ctx = clCreateContext(cps, 1, &dev, NULL, NULL, &status);
CHECK_CL_ERROR(status, "clCreateContext");
#else
// Linux
cl_context_properties cps[] = {
CL_GL_CONTEXT_KHR, ( cl_context_properties) glXGetCurrentContext(), CL_GLX_DISPLAY_KHR, (cl_context_properties) glXGetCurrentDisplay(), CL_CONTEXT_PLATFORM, (cl_context_properties) plat, 0 };
//Probably won't work because &dev should correspond to glContext
*ctx = clCreateContext(cps, 1, &dev, NULL, NULL, &status);
CHECK_CL_ERROR(status, "clCreateContext");
#endif
#else
// create a context
cl_context_properties cps[3] = {
CL_CONTEXT_PLATFORM, (cl_context_properties) plat, 0 };
// create a command queue
cl_command_queue_properties qprops = 0;
if (enable_profiling)
qprops |= CL_QUEUE_PROFILING_ENABLE;
*queue = clCreateCommandQueue(*ctx, dev, qprops, &status);
CHECK_CL_ERROR(status, "clCreateCommandQueue");
#endif
// *ctx = clCreateContext(
// cps, 1, &dev, NULL, NULL, &status);
// CHECK_CL_ERROR(status, "clCreateContext");
// // create a command queue
cl_command_queue_properties qprops = 0;
if (enable_profiling)
qprops |= CL_QUEUE_PROFILING_ENABLE;
*queue = clCreateCommandQueue(*ctx, dev, qprops, &status);
CHECK_CL_ERROR(status, "clCreateCommandQueue");
return;
}
else
--idx;
}
}
free(devices);
}
}
free(platforms);
fputs("create_context_on: specified device not found.\n", stderr);
abort();
}
static void test_opencl_opengl_interop()
{
cl_int status;
cl_device_id renderer;
#ifndef __EMSCRIPTEN__
CGLContextObj gl_context = CGLGetCurrentContext();
// const char * err = CGLErrorString(kCGLContext);
CGLShareGroupObj kCGLShareGroup = CGLGetShareGroup(gl_context);
cl_context_properties properties[] = {
CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE,
(cl_context_properties)kCGLShareGroup, 0
};
clData.ctx = clCreateContext(properties, 0, 0, 0, 0, &status);
CHECK_CL_ERROR(status, "clCreateContext");
// And now we can ask OpenCL which particular device is being used by
// OpenGL to do the rendering, currently:
clGetGLContextInfoAPPLE(clData.ctx, gl_context,
CL_CGL_DEVICE_FOR_CURRENT_VIRTUAL_SCREEN_APPLE, sizeof(renderer),
&renderer, NULL);
#else
cl_context_properties cps[] = {
CL_GL_CONTEXT_KHR, (cl_context_properties) 0, CL_WGL_HDC_KHR, (cl_context_properties) 0, 0};
//Probably won't work because &dev should correspond to glContext
clData.ctx = clCreateContext(cps, 1, &renderer, NULL, NULL, &status);
CHECK_CL_ERROR(status, "clCreateContext");
#endif
cl_uint id_in_use;
clGetDeviceInfo(renderer, CL_DEVICE_VENDOR_ID, sizeof(cl_uint),
&id_in_use, NULL);
clData.device = renderer;
cl_command_queue_properties qprops = 0;
clData.queue = clCreateCommandQueue(clData.ctx, clData.device, qprops, &status);
CHECK_CL_ERROR(status, "clCreateCommandQueue");
int extensionExists = 0;
size_t extensionSize;
int ciErrNum = clGetDeviceInfo( clData.device, CL_DEVICE_EXTENSIONS, 0, NULL, &extensionSize );
char* extensions = (char*) malloc( extensionSize);
ciErrNum = clGetDeviceInfo( clData.device, CL_DEVICE_EXTENSIONS, extensionSize, extensions, &extensionSize);
char * pch;
//printf ("Splitting extensions string \"%s\" into tokens:\n",extensions);
pch = strtok (extensions," ");
while (pch != NULL)
{
printf ("%s\n",pch);
if(strcmp(pch, GL_SHARING_EXTENSION) == 0) {
printf("Device supports gl sharing\n");
extensionExists = 1;
break;
}
pch = strtok (NULL, " ");
}
}
