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Fixed Nintendo Switch Pro thumbstick calibration

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Fixes https://github.com/libsdl-org/SDL/issues/13246
This commit is contained in:
Sam Lantinga
2025-06-21 19:55:05 -07:00
parent e6c2649afc
commit 038a3806eb
1 changed files with 25 additions and 19 deletions
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24
src/joystick/hidapi/SDL_hidapi_switch.c
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@@ -979,7 +979,7 @@ static bool LoadStickCalibration(SDL_DriverSwitch_Context *ctx)
/* Stick calibration values are 12-bits each and are packed by bit
* For whatever reason the fields are in a different order for each stick
* Left: X-Max, Y-Max, X-Center, Y-Center, X-Min, Y-Min
* Right: X-Center, Y-Center, X-Min, Y-Min, X-Max, Y-Max
* Right: X-Center, Y-Center, X-Max, Y-Max, X-Min, Y-Min
*/
// Left stick
@@ -993,10 +993,10 @@ static bool LoadStickCalibration(SDL_DriverSwitch_Context *ctx)
// Right stick
ctx->m_StickCalData[1].axis[0].sCenter = ((pRightStickCal[1] << 8) & 0xF00) | pRightStickCal[0]; // X Axis center
ctx->m_StickCalData[1].axis[1].sCenter = (pRightStickCal[2] << 4) | (pRightStickCal[1] >> 4); // Y Axis center
ctx->m_StickCalData[1].axis[0].sMin = ((pRightStickCal[4] << 8) & 0xF00) | pRightStickCal[3]; // X Axis min below center
ctx->m_StickCalData[1].axis[1].sMin = (pRightStickCal[5] << 4) | (pRightStickCal[4] >> 4); // Y Axis min below center
ctx->m_StickCalData[1].axis[0].sMax = ((pRightStickCal[7] << 8) & 0xF00) | pRightStickCal[6]; // X Axis max above center
ctx->m_StickCalData[1].axis[1].sMax = (pRightStickCal[8] << 4) | (pRightStickCal[7] >> 4); // Y Axis max above center
ctx->m_StickCalData[1].axis[0].sMax = ((pRightStickCal[4] << 8) & 0xF00) | pRightStickCal[3]; // X Axis max above center
ctx->m_StickCalData[1].axis[1].sMax = (pRightStickCal[5] << 4) | (pRightStickCal[4] >> 4); // Y Axis max above center
ctx->m_StickCalData[1].axis[0].sMin = ((pRightStickCal[7] << 8) & 0xF00) | pRightStickCal[6]; // X Axis min below center
ctx->m_StickCalData[1].axis[1].sMin = (pRightStickCal[8] << 4) | (pRightStickCal[7] >> 4); // Y Axis min below center
// Filter out any values that were uninitialized (0xFFF) in the SPI read
for (stick = 0; stick < 2; ++stick) {
@@ -1109,14 +1109,17 @@ static Sint16 ApplyStickCalibration(SDL_DriverSwitch_Context *ctx, int nStick, i
{
sRawValue -= ctx->m_StickCalData[nStick].axis[nAxis].sCenter;
if (sRawValue >= 0) {
if (sRawValue > ctx->m_StickExtents[nStick].axis[nAxis].sMax) {
ctx->m_StickExtents[nStick].axis[nAxis].sMax = sRawValue;
}
return (Sint16)HIDAPI_RemapVal(sRawValue, 0, ctx->m_StickExtents[nStick].axis[nAxis].sMax, 0, SDL_MAX_SINT16);
} else {
if (sRawValue < ctx->m_StickExtents[nStick].axis[nAxis].sMin) {
ctx->m_StickExtents[nStick].axis[nAxis].sMin = sRawValue;
}
return (Sint16)HIDAPI_RemapVal(sRawValue, ctx->m_StickExtents[nStick].axis[nAxis].sMin, ctx->m_StickExtents[nStick].axis[nAxis].sMax, SDL_MIN_SINT16, SDL_MAX_SINT16);
return (Sint16)HIDAPI_RemapVal(sRawValue, ctx->m_StickExtents[nStick].axis[nAxis].sMin, 0, SDL_MIN_SINT16, 0);
}
}
static Sint16 ApplySimpleStickCalibration(SDL_DriverSwitch_Context *ctx, int nStick, int nAxis, Sint16 sRawValue)
@@ -1126,14 +1129,17 @@ static Sint16 ApplySimpleStickCalibration(SDL_DriverSwitch_Context *ctx, int nSt
sRawValue -= usJoystickCenter;
if (sRawValue >= 0) {
if (sRawValue > ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMax) {
ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMax = sRawValue;
}
return (Sint16)HIDAPI_RemapVal(sRawValue, 0, ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMax, 0, SDL_MAX_SINT16);
} else {
if (sRawValue < ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMin) {
ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMin = sRawValue;
}
return (Sint16)HIDAPI_RemapVal(sRawValue, ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMin, ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMax, SDL_MIN_SINT16, SDL_MAX_SINT16);
return (Sint16)HIDAPI_RemapVal(sRawValue, ctx->m_SimpleStickExtents[nStick].axis[nAxis].sMin, 0, SDL_MIN_SINT16, 0);
}
}
static Uint8 RemapButton(SDL_DriverSwitch_Context *ctx, Uint8 button)