private extern static IntPtr clCreateContext(
[MarshalAs(UnmanagedType.LPArray)] IntPtr[] properties,
Int32 num_devices,
[MarshalAs(UnmanagedType.LPArray)] IntPtr[] devices,
ContextNotifyFunction pfn_notify,
IntPtr user_data,
out ErrorCode errcode_ret);
/// <summary>
/// Create a <see cref="Context"/> using the <see cref="Device"/>s of the specified type in this <see cref="Platform"/>.
/// </summary>
/// <param name="type"></param>
/// <param name="notifyFunction"></param>
/// <param name="userData"></param>
/// <returns></returns>
public Context CreateContext(DeviceType type, ContextNotifyFunction notifyFunction = null, IntPtr userData = default)
{
Context context = new Context(this, type, notifyFunction, userData);
if (context.Error)
{
return(null);
}
return(context);
}
/// <summary>
/// Creates a <see cref="Context"/> using the <see cref="Device"/>s of the selected type in the specified <see cref="Platform"/>.
/// </summary>
/// <param name="platform"></param>
/// <param name="type"></param>
/// <param name="notifyFunction"></param>
/// <param name="userData"></param>
public Context(Platform platform, DeviceType type, ContextNotifyFunction notifyFunction = null, IntPtr userData = default)
{
IntPtr[] properties = new IntPtr[3];
properties[0] = new IntPtr((int)ContextProperty.Platform);
properties[1] = platform.Handle;
properties[2] = IntPtr.Zero;
Handle = clCreateContextFromType(properties, type, notifyFunction, userData, out error);
if (error == ErrorCode.Success)
{
Devices = platform.GetDevices(type);
}
}
/// <summary>
/// Creates a <see cref="Context"/> using all the <see cref="Device"/>s of the specified <see cref="Platform"/>.
/// </summary>
/// <param name="platform">The platform to use.</param>
/// <param name="notifyFunction">The callback used to report errors during context creation and at runtime.</param>
/// <param name="userData">Pointer to user data passed to the callback.</param>
public Context(Platform platform, ContextNotifyFunction notifyFunction = null, IntPtr userData = default)
{
IntPtr[] properties = new IntPtr[3];
properties[0] = new IntPtr((int)ContextProperty.Platform);
properties[1] = platform.Handle;
properties[2] = IntPtr.Zero;
Devices = platform?.GetDevices();
if (Devices != null && Devices.Count > 0)
{
IntPtr[] deviceHandles = new IntPtr[Devices.Count];
for (int i = 0; i < Devices.Count; i++)
{
deviceHandles[i] = Devices[i].Handle;
}
Handle = clCreateContext(properties, Devices.Count, deviceHandles, notifyFunction, userData, out error);
}
else
{
error = ErrorCode.InvalidDevice;
}
}
/// <summary>
/// Creates a <see cref="Context"/> using a list of <see cref="Device"/>s.
/// </summary>
/// <param name="devices">The list of devices to use.</param>
/// <param name="notifyFunction">The callback used to report errors during context creation and at runtime.</param>
/// <param name="userData">Pointer to user data passed to the callback.</param>
public Context(List <Device> devices, ContextNotifyFunction notifyFunction = null, IntPtr userData = default)
{
if (devices != null && devices.Count > 0)
{
Devices = devices;
IntPtr[] properties = new IntPtr[3];
properties[0] = new IntPtr((int)ContextProperty.Platform);
properties[1] = devices[0].Platform.Handle;
properties[2] = IntPtr.Zero;
IntPtr[] deviceHandles = new IntPtr[devices.Count];
for (int i = 0; i < devices.Count; i++)
{
deviceHandles[i] = devices[i].Handle;
}
Handle = clCreateContext(properties, devices.Count, deviceHandles, notifyFunction, userData, out error);
}
else
{
error = ErrorCode.InvalidDevice;
}
}
private extern static IntPtr clCreateContextFromType(
[MarshalAs(UnmanagedType.LPArray)] IntPtr[] properties,
DeviceType device_type,
ContextNotifyFunction pfn_notify,
IntPtr user_data,
out ErrorCode errcode_ret);
