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feat(sdl): fixes pinch/swipe on platform sdl

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This commit is contained in:
skinnyjames 2026-05-28 23:20:09 -04:00
parent e7edb181dc
commit 39061d936d
1 changed files with 42 additions and 11 deletions
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53
src/platforms/rcore_desktop_sdl.c
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@ -1399,7 +1399,9 @@ void PollInputEvents(void)
for (int i = 0; i < MAX_TOUCH_POINTS; i++) CORE.Input.Touch.previousTouchState[i] = CORE.Input.Touch.currentTouchState[i];
// Map touch position to mouse position for convenience
if (CORE.Input.Touch.pointCount == 0) CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
// I believe this was intefering with swipe events on 5.5, maybe the pointCount check fixes this
// Uncomment if it breaks mouse, but for now, we'll use the last pointCount
// if (CORE.Input.Touch.pointCount == 0) CORE.Input.Touch.position[0] = CORE.Input.Mouse.currentPosition;
int touchAction = -1; // 0-TOUCH_ACTION_UP, 1-TOUCH_ACTION_DOWN, 2-TOUCH_ACTION_MOVE
bool realTouch = false; // Flag to differentiate real touch gestures from mouse ones
@ -1709,13 +1711,24 @@ void PollInputEvents(void)
} break;
case SDL_FINGERUP:
{
// fingerup returns a touchCount of 0 which is ignored by rgestures.h
// use the last pointCount from down
int count = CORE.Input.Touch.pointCount;
UpdateTouchPointsSDL(event.tfinger);
CORE.Input.Touch.pointCount = count;
touchAction = 0;
realTouch = true;
} break;
case SDL_FINGERMOTION:
{
// fingermotion returns a touchCount of 0 on SDL3 pinephone? (not sure why)
// which is ignored by rgestures.h
// use the last pointCount from down
int count = CORE.Input.Touch.pointCount;
UpdateTouchPointsSDL(event.tfinger);
CORE.Input.Touch.pointCount = count;
touchAction = 2;
realTouch = true;
} break;
@ -1924,24 +1937,42 @@ void PollInputEvents(void)
// Register touch actions
gestureEvent.touchAction = touchAction;
// Assign a pointer ID
gestureEvent.pointId[0] = 0;
if (realTouch)
{
// Register touch points count
gestureEvent.pointCount = CORE.Input.Touch.pointCount;
// Register touch points count
gestureEvent.pointCount = 1;
// we want to track every touch.
for (int i = 0; i < CORE.Input.Touch.pointCount; i++)
{
gestureEvent.pointId[i] = i;
gestureEvent.position[i].x = CORE.Input.Touch.position[i].x / (float)GetScreenWidth();
gestureEvent.position[i].y = CORE.Input.Touch.position[i].y / (float)GetScreenWidth();
}
}
else
{
// Assign a pointer ID
gestureEvent.pointId[0] = 0;
// Register touch points position, only one point registered
if (touchAction == 2 || realTouch) gestureEvent.position[0] = CORE.Input.Touch.position[0];
else gestureEvent.position[0] = GetMousePosition();
// Register touch points count
gestureEvent.pointCount = 1;
// Normalize gestureEvent.position[0] for CORE.Window.screen.width and CORE.Window.screen.height
gestureEvent.position[0].x /= (float)GetScreenWidth();
gestureEvent.position[0].y /= (float)GetScreenHeight();
// Register touch points position, only one point registered
if (touchAction == 2 || realTouch) gestureEvent.position[0] = CORE.Input.Touch.position[0];
else gestureEvent.position[0] = GetMousePosition();
// Normalize gestureEvent.position[0] for CORE.Window.screen.width and CORE.Window.screen.height
gestureEvent.position[0].x /= (float)GetScreenWidth();
gestureEvent.position[0].y /= (float)GetScreenHeight();
}
// Gesture data is sent to gestures-system for processing
ProcessGestureEvent(gestureEvent);
touchAction = -1;
// not sure how this behaves when mixing Mouse/Touch
realTouch = false;
}
#endif
}