internal unsafe CyHidReport(HIDP_REPORT_TYPE rType, HIDP_CAPS hidCaps, byte *PreparsedDta)
{
_rptType = rType;
if (rType == HIDP_REPORT_TYPE.HidP_Input)
{
_RptByteLen = hidCaps.InputReportByteLength;
_NumBtnCaps = hidCaps.NumberInputButtonCaps;
_NumValCaps = hidCaps.NumberInputValueCaps;
}
else if (rType == HIDP_REPORT_TYPE.HidP_Output)
{
_RptByteLen = hidCaps.OutputReportByteLength;
_NumBtnCaps = hidCaps.NumberOutputButtonCaps;
_NumValCaps = hidCaps.NumberOutputValueCaps;
}
else
{
_RptByteLen = hidCaps.FeatureReportByteLength;
_NumBtnCaps = hidCaps.NumberFeatureButtonCaps;
_NumValCaps = hidCaps.NumberFeatureValueCaps;
}
// Big enough to hold the report ID and the report data
if (_RptByteLen > 0)
{
DataBuf = new byte[_RptByteLen + 1];
}
if (_NumBtnCaps > 0)
{
HIDP_BTN_VAL_CAPS ButtonCaps;
Buttons = new CyHidButton[_NumBtnCaps];
HIDP_BTN_VAL_CAPS bc = new HIDP_BTN_VAL_CAPS();
byte[] buffer = new byte[_NumBtnCaps * Marshal.SizeOf(bc)];
fixed(byte *buf = buffer)
{
int numCaps = _NumBtnCaps;
//
// BUGFIX 3/07/2008 - HidP_GetButtonCaps will modify numCaps to the
// "actual number of elements that the routine returns".
// In the somewhat rare event that numcaps is < _NumBtnCaps
// on return, the reference to bCaps[i] in the loop below
// will throw an "Index Was Outside the Bounds of the Array"
// Exception. This would occur for example when the
// top-level HID report (being reported here) contains
// a subset of the available buttons in the full HID interface.
//
PInvoke.HidP_GetButtonCaps(rType, buf, ref numCaps, PreparsedDta);
//
// Reset _NumBtnCaps to the actual returned value.
//
_NumBtnCaps = numCaps;
HIDP_BTN_VAL_CAPS *bCaps = (HIDP_BTN_VAL_CAPS *)buf;
for (int i = 0; i < _NumBtnCaps; i++)
{
// This assignment copies values from buf into ButtonCaps.
ButtonCaps = bCaps[i];
// Note that you must pass ButtonCaps to the
// below constructor and not bCaps[i]
Buttons[i] = new CyHidButton(ButtonCaps);
// Each button should have the same ReportID
_ReportID = ButtonCaps.ReportID;
}
}
}
if (_NumValCaps > 0)
{
Values = new CyHidValue[_NumValCaps];
HIDP_BTN_VAL_CAPS vc = new HIDP_BTN_VAL_CAPS();
byte[] buffer = new byte[_NumValCaps * Marshal.SizeOf(vc)];
fixed(byte *buf = buffer)
{
int numCaps = _NumValCaps;
PInvoke.HidP_GetValueCaps(rType, buf, ref numCaps, PreparsedDta);
HIDP_BTN_VAL_CAPS *vCaps = (HIDP_BTN_VAL_CAPS *)buf;
for (int i = 0; i < _NumValCaps; i++)
{
// This assignment copies values from buf into ValueCaps.
HIDP_BTN_VAL_CAPS ValueCaps = vCaps[i];
// Note that you must pass ValueCaps[i] to the
// below constructor and not vCaps[i]
Values[i] = new CyHidValue(ValueCaps);
// Each value should have the same ReportID
_ReportID = ValueCaps.ReportID;
}
}
}
_NumValues = 0;
for (int i = 0; i < _NumValCaps; i++)
{
//if (Values[i].IsRange)
// _NumValues += Values[i].UsageMax - Values[i].Usage + 1;
//else
_NumValues++;
}
_NumItems = _NumBtnCaps + _NumValues;
if (_NumItems > 0)
{
Items = new HID_DATA[_NumItems];
}
//if ((ButtonCaps != null) && (Items != null))
if ((_NumBtnCaps > 0) && (Items != null))
{
for (int i = 0; i < _NumBtnCaps; i++)
{
Items[i].IsButtonData = 1;
Items[i].Status = CyConst.HIDP_STATUS_SUCCESS;
Items[i].UsagePage = Buttons[i].UsagePage;
if (Buttons[i].IsRange)
{
Items[i].Usage = Buttons[i].Usage;
Items[i].UsageMax = Buttons[i].UsageMax;
}
else
{
Items[i].Usage = Items[i].UsageMax = Buttons[i].Usage;
}
Items[i].MaxUsageLength = PInvoke.HidP_MaxUsageListLength(
rType,
Buttons[i].UsagePage,
PreparsedDta);
Items[i].Usages = new ushort[Items[i].MaxUsageLength];
Items[i].ReportID = Buttons[i].ReportID;
}
}
for (int i = 0; i < _NumValues; i++)
{
if (Values[i].IsRange)
{
for (ushort usage = Values[i].Usage;
usage <= Values[i].UsageMax;
usage++)
{
Items[i].IsButtonData = 0;
Items[i].Status = CyConst.HIDP_STATUS_SUCCESS;
Items[i].UsagePage = Values[i].UsagePage;
Items[i].Usage = usage;
Items[i].ReportID = Values[i].ReportID;
}
}
else
{
Items[i].IsButtonData = 0;
Items[i].Status = CyConst.HIDP_STATUS_SUCCESS;
Items[i].UsagePage = Values[i].UsagePage;
Items[i].Usage = Values[i].Usage;
Items[i].ReportID = Values[i].ReportID;
}
}
} // End of CyHidReport constructor