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XInput2: Request XInput 2.1 

We need XInput 2.1 to get raw events on the root window even while
another client has a grab.  We currently use raw events for relative
mouse input, and upcoming commits will use raw events for buttons and
keys.
This commit is contained in:
Jeffrey Bosboom 2023-04-15 02:13:01 -07:00
parent a902480cb0
commit 46540ea42b
1 changed files with 22 additions and 4 deletions
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26
Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
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@ -5,12 +5,14 @@
#include <X11/XKBlib.h>
#include <X11/extensions/XInput2.h>
#include <cmath>
#include <cstdlib>
#include <cstring>
#include <fmt/format.h>
#include "Common/Logging/Log.h"
#include "Common/StringUtil.h"
#include "Core/Host.h"
@ -54,6 +56,14 @@
// more cleanly separate each scroll wheel click, but risks dropping some inputs
#define SCROLL_AXIS_DECAY 1.1f
namespace
{
// We need XInput 2.1 to get raw events on the root window even while another
// client has a grab. If we request 2.2 or later, the server will not generate
// emulated button presses from touch events, so we want exactly 2.1.
constexpr int XINPUT_MAJOR = 2, XINPUT_MINOR = 1;
} // namespace
namespace ciface::XInput2
{
// This function will add zero or more KeyboardMouse objects to devices.
@ -67,13 +77,18 @@ void PopulateDevices(void* const hwnd)
// verify that the XInput extension is available
if (!XQueryExtension(dpy, "XInputExtension", &xi_opcode, &event, &error))
{
WARN_LOG_FMT(CONTROLLERINTERFACE, "XInput extension not available (XQueryExtension)");
return;
}
// verify that the XInput extension is at at least version 2.0
int major = 2, minor = 0;
if (XIQueryVersion(dpy, &major, &minor) != Success)
int major = XINPUT_MAJOR, minor = XINPUT_MINOR;
if (XIQueryVersion(dpy, &major, &minor) != Success || major < XINPUT_MAJOR ||
(major == XINPUT_MAJOR && minor < XINPUT_MINOR))
{
WARN_LOG_FMT(CONTROLLERINTERFACE, "XInput extension not available (XIQueryVersion)");
return;
}
// register all master devices with Dolphin
@ -160,6 +175,9 @@ KeyboardMouse::KeyboardMouse(Window window, int opcode, int pointer, int keyboar
// "context."
m_display = XOpenDisplay(nullptr);
int major = XINPUT_MAJOR, minor = XINPUT_MINOR;
XIQueryVersion(m_display, &major, &minor);
// should always be 1
int unused;
XIDeviceInfo* const pointer_device = XIQueryDevice(m_display, pointer_deviceid, &unused);