SDL: Fix erratic analog pointer + control options

Fixes erratic speeds in analog pointer motion
Implemented option to set analog/keyboard pointer speed
and control the analog joystick deadzone. The deadzone option appears
only if the build supports analog joystick (via JOY_ANALOG define)

1 files changed, 14 insertions, 0 deletions

diff --git a/backends/platform/sdl/sdl.cpp b/backends/platform/sdl/sdl.cpp
index 74c40ade10..1c5a7c2cbf 100644
--- a/backends/platform/sdl/sdl.cpp
+++ b/backends/platform/sdl/sdl.cpp
@@ -179,6 +179,10 @@ bool OSystem_SDL::hasFeature(Feature f) {
 #if SDL_VERSION_ATLEAST(2, 0, 0)
 	if (f == kFeatureClipboardSupport) return true;
 #endif
+#ifdef JOY_ANALOG
+	if (f == kFeatureJoystickDeadzone) return true;
+#endif
+	if (f == kFeatureKbdMouseSpeed) return true;
 	return ModularBackend::hasFeature(f);
 }
 
@@ -274,6 +278,16 @@ void OSystem_SDL::initBackend() {
 
 	_inited = true;
 
+	if (!ConfMan.hasKey("kbdmouse_speed")) {
+		ConfMan.registerDefault("kbdmouse_speed", 3);
+		ConfMan.setInt("kbdmouse_speed", 3);
+	}
+#ifdef JOY_ANALOG
+	if (!ConfMan.hasKey("joystick_deadzone")) {
+		ConfMan.registerDefault("joystick_deadzone", 3);
+		ConfMan.setInt("joystick_deadzone", 3);
+	}
+#endif
 	ModularBackend::initBackend();
 
 	// We have to initialize the graphics manager before the event manager