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evdev: Support axis with ranges which extend below zero.

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This commit is contained in:
Scott Mansell 2015-07-01 00:37:26 +12:00
parent 0dc8763247
commit 77183899e0
2 changed files with 10 additions and 3 deletions
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12
Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
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@ -164,7 +164,8 @@ ControlState evdevDevice::Button::GetState() const
evdevDevice::Axis::Axis(u8 index, u16 code, bool upper, libevdev* dev) :
m_code(code), m_index(index), m_upper(upper), m_dev(dev)
{
m_range = libevdev_get_abs_maximum(m_dev, m_code);
m_min = libevdev_get_abs_minimum(m_dev, m_code);
m_range = libevdev_get_abs_maximum(m_dev, m_code) + abs(m_min);
}
std::string evdevDevice::Axis::GetName() const
@ -176,10 +177,15 @@ ControlState evdevDevice::Axis::GetState() const
{
int value = 0;
libevdev_fetch_event_value(m_dev, EV_ABS, m_code, &value);
// Value from 0.0 to 1.0
ControlState fvalue = double(value - m_min) / double(m_range);
// Split into two axis, each covering half the range from 0.0 to 1.0
if (m_upper)
return std::max(0.0, double(value) / double(m_range) - 0.5) * 2.0;
return std::max(0.0, fvalue - 0.5) * 2.0;
else
return (0.5 - std::min(0.5, double(value) / double(m_range))) * 2.0;
return (0.5 - std::min(0.5, fvalue)) * 2.0;
}
std::string evdevDevice::ForceFeedback::GetName() const

1
Source/Core/InputCommon/ControllerInterface/evdev/evdev.h
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@ -43,6 +43,7 @@ private:
const u8 m_index;
const bool m_upper;
int m_range;
int m_min;
libevdev* m_dev;
};