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DirectInput: Use more than 8 bits of precision on axis inputs.

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This commit is contained in:
Jordan Woyak 2019-01-06 08:14:37 -06:00
parent 0ca9accd8b
commit a7c45fb49e
1 changed files with 7 additions and 6 deletions
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13
Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
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@ -3,6 +3,7 @@
// Refer to the license.txt file included. // Refer to the license.txt file included.
#include <algorithm> #include <algorithm>
#include <limits>
#include <map> #include <map>
#include <sstream> #include <sstream>
@ -121,13 +122,13 @@ Joystick::Joystick(/*const LPCDIDEVICEINSTANCE lpddi, */ const LPDIRECTINPUTDEVI
for (unsigned int offset = 0; offset < DIJOFS_BUTTON(0) / sizeof(LONG); ++offset) for (unsigned int offset = 0; offset < DIJOFS_BUTTON(0) / sizeof(LONG); ++offset)
{ {
range.diph.dwObj = offset * sizeof(LONG); range.diph.dwObj = offset * sizeof(LONG);
// try to set some nice power of 2 values (128) to match the GameCube controls // Try to set a range with 16 bits of precision:
range.lMin = -(1 << 7); range.lMin = std::numeric_limits<s16>::min();
range.lMax = (1 << 7); range.lMax = std::numeric_limits<s16>::max();
m_device->SetProperty(DIPROP_RANGE, &range.diph); m_device->SetProperty(DIPROP_RANGE, &range.diph);
// but I guess not all devices support setting range // Not all devices support setting DIPROP_RANGE so we must GetProperty right back.
// so I getproperty right afterward incase it didn't set. // This also checks that the axis is present.
// This also checks that the axis is present // Note: Even though not all devices support setting DIPROP_RANGE, some require it.
if (SUCCEEDED(m_device->GetProperty(DIPROP_RANGE, &range.diph))) if (SUCCEEDED(m_device->GetProperty(DIPROP_RANGE, &range.diph)))
{ {
const LONG base = (range.lMin + range.lMax) / 2; const LONG base = (range.lMin + range.lMax) / 2;