public static Context Create(Platforms platforms, Devices devices)
{
CLError error = CLError.None;
// TODO: Add parameter pfn_notify (logging function)
CLContext openclContext = OpenCLDriver.clCreateContext(GetContextProperties(platforms), devices.Count, devices.OpenCLDeviceArray, null, IntPtr.Zero, ref error);
OpenCLError.Validate(error);
return(new Context(openclContext, platforms, devices));
}
/// <summary>
/// Setup OpenCL
/// </summary>
internal static void Setup()
{
try
{
// ADD YOUR CODE HERE
CLError err;
uint num_entries = 0;// get platform
CLPlatformID[] platforms = new CLPlatformID[5];
err = OpenCLDriver.clGetPlatformIDs(5, platforms, ref num_entries);
if (num_entries == 0)
{
throw new Exception("No Platform Entries found!");
}
//get device ID
CLDeviceID[] devices = new CLDeviceID[1];
err = OpenCLDriver.clGetDeviceIDs(platforms[0], CLDeviceType.GPU, 1, devices, ref num_entries);
// create context
ctx = OpenCLDriver.clCreateContext(null, 1, devices, null, IntPtr.Zero, ref err);
if (err != CLError.Success)
{
throw new Exception(err.ToString());
}
// create command queue
comQ = OpenCLDriver.clCreateCommandQueue(ctx, devices[0], 0, ref err);
if (err != CLError.Success)
{
throw new Exception(err.ToString());
}
// Compile Program
string[] progString = new string[1];
progString[0] = File.ReadAllText("..\\..\\prog.cl");
program = OpenCLDriver.clCreateProgramWithSource(ctx, 1, progString, null, ref err);
err = OpenCLDriver.clBuildProgram(program, 1, devices, "", null, IntPtr.Zero);
//create kernel
kernel_mult = OpenCLDriver.clCreateKernel(program, "multiply", ref err);
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString());
}
}
public static IntPtr ShareForMac(IntPtr cglShareGroup)
{
CLError error = CLError.None;
IntPtr[] properties =
{
new IntPtr(0x10000000), // CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE
cglShareGroup,
new IntPtr(0)
};
// TODO: Add parameter pfn_notify (logging function)
CLContext openclContext = OpenCLDriver.clCreateContext(properties, 0, null, null, IntPtr.Zero, ref error);
OpenCLError.Validate(error);
return(openclContext.Value);
}
public static Context ShareWithCGL(IntPtr cglShareGroup)
{
IntPtr[] properties =
{
new IntPtr(0x10000000), // CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE
cglShareGroup,
new IntPtr(0)
};
CLError error = CLError.None;
// TODO: Add parameter pfn_notify (logging function)
CLContext openclContext = OpenCLDriver.clCreateContext(properties, 0, null, null, IntPtr.Zero, ref error);
OpenCLError.Validate(error);
SizeT devicesSize = SizeT.Zero;
OpenCLError.Validate(OpenCLDriver.clGetContextInfo(openclContext, CLContextInfo.Devices, SizeT.Zero, IntPtr.Zero, ref devicesSize));
CLDeviceID[] devices = new CLDeviceID[((Int64)(devicesSize)) / IntPtr.Size];
GCHandle devicesHandle = GCHandle.Alloc(devices, GCHandleType.Pinned);
try
{
OpenCLError.Validate(OpenCLDriver.clGetContextInfo(openclContext, CLContextInfo.Devices, devicesSize, devicesHandle.AddrOfPinnedObject(), ref devicesSize));
Dictionary <CLPlatformID, CLPlatformID> platformsDictionary = new Dictionary <CLPlatformID, CLPlatformID>();
CLPlatformID[] platforms = null;
foreach (CLDeviceID device in devices)
{
SizeT platformsSize = SizeT.Zero;
OpenCLError.Validate(OpenCLDriver.clGetDeviceInfo(device, CLDeviceInfo.Platform, SizeT.Zero, platforms, ref platformsSize));
platforms = new CLPlatformID[((Int64)(platformsSize)) / IntPtr.Size];
OpenCLError.Validate(OpenCLDriver.clGetDeviceInfo(device, CLDeviceInfo.Platform, platformsSize, platforms, ref platformsSize));
foreach (CLPlatformID platform in platforms)
{
if (!platformsDictionary.ContainsKey(platform))
{
platformsDictionary.Add(platform, platform);
}
}
}
platforms = new CLPlatformID[platformsDictionary.Count];
Int32 index = 0;
foreach (var platform in platformsDictionary.Keys)
{
platforms[index++] = platform;
}
return(new Context(openclContext, new Platforms(platforms), new Devices(devices)));
}
finally
{
devicesHandle.Free();
}
}
