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Batch absolute mouse motion like we do for relative motion

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This commit is contained in:
Cameron Gutman
2020-05-31 13:34:50 -07:00
parent e0154f9314
commit f00653964e
3 changed files with 53 additions and 18 deletions
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60
app/streaming/input/mouse.cpp
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@@ -67,29 +67,23 @@ void SdlInputHandler::handleMouseMotionEvent(SDL_MouseMotionEvent* event)
return;
}
// Batch until the next mouse polling window or we'll get awful
// input lag everything except GFE 3.14 and 3.15.
if (m_AbsoluteMouseMode) {
SDL_Rect src, dst;
int windowWidth, windowHeight;
src.x = src.y = 0;
src.w = m_StreamWidth;
src.h = m_StreamHeight;
// Call SDL_GetWindowSize() before entering the spinlock
SDL_GetWindowSize(m_Window, &windowWidth, &windowHeight);
dst.x = dst.y = 0;
SDL_GetWindowSize(m_Window, &dst.w, &dst.h);
// Use the stream and window sizes to determine the video region
StreamUtils::scaleSourceToDestinationSurface(&src, &dst);
// Clamp motion to the video region
short x = qMin(qMax(event->x - dst.x, 0), dst.w);
short y = qMin(qMax(event->y - dst.y, 0), dst.h);
// Send the mouse position update
LiSendMousePositionEvent(x, y, dst.w, dst.h);
SDL_AtomicLock(&m_MousePositionLock);
m_MousePositionReport.x = event->x;
m_MousePositionReport.y = event->y;
m_MousePositionReport.windowWidth = windowWidth;
m_MousePositionReport.windowHeight = windowHeight;
SDL_AtomicUnlock(&m_MousePositionLock);
SDL_AtomicSet(&m_MousePositionUpdated, 1);
}
else {
// Batch until the next mouse polling window or we'll get awful
// input lag everything except GFE 3.14 and 3.15.
SDL_AtomicAdd(&m_MouseDeltaX, event->xrel);
SDL_AtomicAdd(&m_MouseDeltaY, event->yrel);
}
@@ -122,6 +116,36 @@ Uint32 SdlInputHandler::mouseMoveTimerCallback(Uint32 interval, void *param)
LiSendMouseMoveEvent(deltaX, deltaY);
}
bool hasNewPosition = SDL_AtomicSet(&me->m_MousePositionUpdated, 0) != 0;
if (hasNewPosition) {
// If the lock is held now, the main thread is trying to update
// the mouse position. We'll pick up the new position next time.
if (SDL_AtomicTryLock(&me->m_MousePositionLock)) {
SDL_Rect src, dst;
src.x = src.y = 0;
src.w = me->m_StreamWidth;
src.h = me->m_StreamHeight;
dst.x = dst.y = 0;
dst.w = me->m_MousePositionReport.windowWidth;
dst.h = me->m_MousePositionReport.windowHeight;
// Use the stream and window sizes to determine the video region
StreamUtils::scaleSourceToDestinationSurface(&src, &dst);
// Clamp motion to the video region
short x = qMin(qMax(me->m_MousePositionReport.x - dst.x, 0), dst.w);
short y = qMin(qMax(me->m_MousePositionReport.y - dst.y, 0), dst.h);
// Release the spinlock to unblock the main thread
SDL_AtomicUnlock(&me->m_MousePositionLock);
// Send the mouse position update
LiSendMousePositionEvent(x, y, dst.w, dst.h);
}
}
#ifdef Q_OS_WIN32
// See comment in SdlInputHandler::notifyMouseLeave()
if (me->m_AbsoluteMouseMode && me->m_PendingMouseLeaveButtonUp != 0 && me->isCaptureActive()) {