public WacomTouchReport(byte[] report, ref TouchPoint[] prevTouches)
{
Raw = report;
AuxButtons = Array.Empty <bool>();
Touches = prevTouches ?? new TouchPoint[MAX_POINTS];
if (report[2] == 0x81)
{
ApplyTouchMask((ushort)(Raw[3] | (Raw[4] << 8)));
prevTouches = (TouchPoint[])Touches.Clone();
return;
}
var nChunks = Raw[1];
for (var i = 0; i < nChunks; i++)
{
var offset = (i << 3) + 2;
var touchID = Raw[offset];
if (touchID == 0x80)
{
var auxByte = report[1 + offset];
AuxButtons = new bool[]
{
auxByte.IsBitSet(0),
auxByte.IsBitSet(1),
auxByte.IsBitSet(2),
auxByte.IsBitSet(3),
};
continue;
}
touchID -= 2;
if (touchID >= MAX_POINTS)
{
continue;
}
var touchState = Raw[1 + offset];
if (touchState == 0x20)
{
Touches[touchID] = null;
}
else
{
Touches[touchID] = new TouchPoint
{
TouchID = touchID,
Position = new Vector2
{
X = (Raw[2 + offset] << 4) | (Raw[4 + offset] >> 4),
Y = (Raw[3 + offset] << 4) | (Raw[4 + offset] & 0xF)
},
};
}
}
prevTouches = (TouchPoint[])Touches.Clone();
}
public WacomTouchReport(byte[] report)
{
Raw = report;
AuxButtons = new bool[0];
Touches = prevTouches ?? new TouchPoint[MAX_POINTS];
if (report[2] == 0x81)
{
ApplyTouchMask((ushort)(Raw[3] | (Raw[4] << 8)));
prevTouches = (TouchPoint[])Touches.Clone();
return;
}
var nChunks = Raw[1];
for (var i = 0; i < nChunks; i++)
{
var offset = (i << 3) + 2;
var touchID = Raw[offset];
if (touchID == 0x80)
{
AuxButtons = new bool[]
{
(report[1 + offset] & (1 << 0)) != 0,
(report[1 + offset] & (1 << 1)) != 0,
(report[1 + offset] & (1 << 2)) != 0,
(report[1 + offset] & (1 << 3)) != 0
};
continue;
}
touchID -= 2;
if (touchID >= MAX_POINTS)
{
continue;
}
var touchState = Raw[1 + offset];
if (touchState == 0x20)
{
Touches[touchID] = null;
}
else
{
Touches[touchID] = new TouchPoint
{
TouchID = touchID,
Position = new Vector2
{
X = (Raw[2 + offset] << 4) | (Raw[4 + offset] >> 4),
Y = (Raw[3 + offset] << 4) | (Raw[4 + offset] & 0xF)
},
};
}
}
prevTouches = (TouchPoint[])Touches.Clone();
}
public IntuosV2TouchReport(byte[] report)
{
Raw = report;
Touches = prevTouches ?? new TouchPoint[MAX_POINTS];
for (var i = 0; i < 5; i++)
{
var offset = (i << 3) + 2;
var touchID = Raw[offset];
if (touchID == 0)
{
continue;
}
touchID -= 1;
if (touchID >= MAX_POINTS)
{
continue;
}
var touchState = Raw[1 + offset];
if (touchState == 0)
{
Touches[touchID] = null;
}
else
{
Touches[touchID] = new TouchPoint
{
TouchID = touchID,
Position = new Vector2
{
X = Unsafe.ReadUnaligned <ushort>(ref report[2 + offset]),
Y = Unsafe.ReadUnaligned <ushort>(ref report[4 + offset]),
},
};
}
}
prevTouches = (TouchPoint[])Touches.Clone();
}
public IntuosV3TouchReport(byte[] report)
{
Raw = report;
Touches = prevTouches ?? new TouchPoint[MAX_POINTS];
for (var i = 0; i < 5; i++)
{
var offset = (i << 3) + 2;
var touchID = Raw[offset];
if (touchID == 0)
{
continue;
}
touchID -= 1;
if (touchID >= MAX_POINTS)
{
continue;
}
var touchState = Raw[1 + offset];
if (touchState == 0)
{
Touches[touchID] = null;
}
else
{
Touches[touchID] = new TouchPoint
{
TouchID = touchID,
Position = new Vector2
{
X = BitConverter.ToUInt16(Raw, 2 + offset),
Y = BitConverter.ToUInt16(Raw, 4 + offset),
},
};
}
}
prevTouches = (TouchPoint[])Touches.Clone();
}