private unsafe void UpdateButtons(RawInput *rin, Device stick)
{
stick.ClearButtons();
for (int i = 0; i < stick.ButtonCaps.Count; i++)
{
short * usage_list = stackalloc short[64];
int usage_length = 64;
HIDPage page = stick.ButtonCaps[i].UsagePage;
short collection = stick.ButtonCaps[i].LinkCollection;
HidProtocolStatus status = HidProtocol.GetUsages(
HidProtocolReportType.Input,
page, 0, usage_list, ref usage_length,
PreparsedData,
new IntPtr((void *)&rin->Data.HID.RawData),
rin->Data.HID.Size);
if (status != HidProtocolStatus.Success)
{
Debug.Print("[WinRawJoystick] HidProtocol.GetUsages() failed with {0}",
Marshal.GetLastWin32Error());
continue;
}
for (int j = 0; j < usage_length; j++)
{
short usage = *(usage_list + j);
stick.SetButton(collection, page, usage, true);
}
}
}
private unsafe void UpdateAxes(RawInput *rin, Device stick)
{
for (int i = 0; i < stick.AxisCaps.Count; i++)
{
if (stick.AxisCaps[i].IsRange)
{
Debug.Print("[{0}] Axis range collections not implemented. Please report your controller type at https://github.com/opentk/opentk/issues",
GetType().Name);
continue;
}
HIDPage page = stick.AxisCaps[i].UsagePage;
short usage = stick.AxisCaps[i].NotRange.Usage;
uint value = 0;
short collection = stick.AxisCaps[i].LinkCollection;
HidProtocolStatus status = HidProtocol.GetUsageValue(
HidProtocolReportType.Input,
page, 0, usage, ref value,
PreparsedData,
new IntPtr((void *)&rin->Data.HID.RawData),
rin->Data.HID.Size);
if (status != HidProtocolStatus.Success)
{
Debug.Print("[{0}] HidProtocol.GetScaledUsageValue() failed. Error: {1}",
GetType().Name, status);
continue;
}
if (page == HIDPage.GenericDesktop && (HIDUsageGD)usage == HIDUsageGD.Hatswitch)
{
stick.SetHat(collection, page, usage, GetHatPosition(value, stick.AxisCaps[i]));
}
else
{
if (stick.AxisCaps[i].LogicalMin > 0)
{
short scaled_value = (short)HidHelper.ScaleValue(
(int)((long)value + stick.AxisCaps[i].LogicalMin),
stick.AxisCaps[i].LogicalMin, stick.AxisCaps[i].LogicalMax,
Int16.MinValue, Int16.MaxValue);
stick.SetAxis(collection, page, usage, scaled_value);
}
else
{
//If our stick returns a minimum value below zero, we should not add this to our value
//before attempting to scale it, as this then inverts the value
short scaled_value = (short)HidHelper.ScaleValue(
(int)(long)value,
stick.AxisCaps[i].LogicalMin, stick.AxisCaps[i].LogicalMax,
Int16.MinValue, Int16.MaxValue);
stick.SetAxis(collection, page, usage, scaled_value);
}
}
}
}
private static bool GetDeviceCaps(Device stick, byte[] preparsed_data, out HidProtocolCaps caps)
{
// Query joystick capabilities
caps = new HidProtocolCaps();
if (HidProtocol.GetCaps(preparsed_data, ref caps) != HidProtocolStatus.Success)
{
Debug.Print("[WinRawJoystick] HidProtocol.GetCaps() failed with {0}",
Marshal.GetLastWin32Error());
return(false);
}
// Make sure our caps arrays are big enough
HidProtocolValueCaps[] axis_caps = new HidProtocolValueCaps[caps.NumberInputValueCaps];
HidProtocolButtonCaps[] button_caps = new HidProtocolButtonCaps[caps.NumberInputButtonCaps];
// Axis capabilities
ushort axis_count = (ushort)axis_caps.Length;
if (HidProtocol.GetValueCaps(HidProtocolReportType.Input,
axis_caps, ref axis_count, preparsed_data) !=
HidProtocolStatus.Success)
{
Debug.Print("[WinRawJoystick] HidProtocol.GetValueCaps() failed with {0}",
Marshal.GetLastWin32Error());
return(false);
}
// Button capabilities
ushort button_count = (ushort)button_caps.Length;
if (HidProtocol.GetButtonCaps(HidProtocolReportType.Input,
button_caps, ref button_count, preparsed_data) !=
HidProtocolStatus.Success)
{
Debug.Print("[WinRawJoystick] HidProtocol.GetButtonCaps() failed with {0}",
Marshal.GetLastWin32Error());
return(false);
}
stick.AxisCaps.Clear();
stick.AxisCaps.AddRange(axis_caps);
stick.ButtonCaps.Clear();
stick.ButtonCaps.AddRange(button_caps);
return(true);
}
public unsafe bool ProcessEvent(IntPtr raw)
{
// Query the size of the raw HID data buffer
int size = 0;
Functions.GetRawInputData(raw, GetRawInputDataEnum.INPUT, IntPtr.Zero, ref size, RawInputHeader.SizeInBytes);
if (size > HIDData.Length)
{
Array.Resize(ref HIDData, size);
}
// Retrieve the raw HID data buffer
if (Functions.GetRawInputData(raw, HIDData) > 0)
{
fixed(byte *pdata = HIDData)
{
RawInput *rin = (RawInput *)pdata;
IntPtr handle = rin->Header.Device;
Device stick = GetDevice(handle);
if (stick == null)
{
Debug.Print("[WinRawJoystick] Unknown device {0}", handle);
return(false);
}
if (stick.IsXInput)
{
return(true);
}
if (!GetPreparsedData(handle, ref PreparsedData))
{
return(false);
}
// Query current state
// Allocate enough storage to hold the data of the current report
int report_count = HidProtocol.MaxDataListLength(HidProtocolReportType.Input, PreparsedData);
if (report_count == 0)
{
Debug.Print("[WinRawJoystick] HidProtocol.MaxDataListLength() failed with {0}",
Marshal.GetLastWin32Error());
return(false);
}
// Fill the data buffer
if (DataBuffer.Length < report_count)
{
Array.Resize(ref DataBuffer, report_count);
}
UpdateAxes(rin, stick);
UpdateButtons(rin, stick);
return(true);
}
}
return(false);
}