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Implement full multi-touch support using Sunshine protocol extension

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This commit is contained in:
Cameron Gutman 2023-06-18 16:02:21 -05:00
parent e42de9d155
commit 2165f56aee
2 changed files with 57 additions and 0 deletions
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55
app/streaming/input/abstouch.cpp
View file

@ -28,6 +28,61 @@ Uint32 SdlInputHandler::longPressTimerCallback(Uint32, void*)
}
void SdlInputHandler::handleAbsoluteFingerEvent(SDL_TouchFingerEvent* event)
{
SDL_Rect src, dst;
int windowWidth, windowHeight;
SDL_GetWindowSize(m_Window, &windowWidth, &windowHeight);
src.x = src.y = 0;
src.w = m_StreamWidth;
src.h = m_StreamHeight;
dst.x = dst.y = 0;
dst.w = windowWidth;
dst.h = windowHeight;
// Scale window-relative events to be video-relative and clamp to video region
float vidrelx = qMin(qMax((int)(event->x * windowWidth), dst.x), dst.x + dst.w) - dst.x;
float vidrely = qMin(qMax((int)(event->y * windowHeight), dst.y), dst.y + dst.h) - dst.y;
uint8_t eventType;
switch (event->type) {
case SDL_FINGERDOWN:
eventType = LI_TOUCH_EVENT_DOWN;
break;
case SDL_FINGERMOTION:
eventType = LI_TOUCH_EVENT_MOVE;
break;
case SDL_FINGERUP:
eventType = LI_TOUCH_EVENT_UP;
break;
default:
return;
}
uint32_t pointerId;
// If the pointer ID is larger than we can fit, just CRC it and use that as the ID.
if ((uint64_t)event->fingerId > UINT32_MAX) {
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
QByteArrayView bav((char*)&event->fingerId, sizeof(event->fingerId));
pointerId = qChecksum(bav);
#else
pointerId = qChecksum((char*)&event->fingerId, sizeof(event->fingerId));
#endif
}
else {
pointerId = (uint32_t)event->fingerId;
}
// Try to send it as a native touch event, otherwise fall back to our touch emulation
if (LiSendTouchEvent(eventType, pointerId, vidrelx / dst.w, vidrely / dst.h, event->pressure) == LI_ERR_UNSUPPORTED) {
emulateAbsoluteFingerEvent(event);
}
}
void SdlInputHandler::emulateAbsoluteFingerEvent(SDL_TouchFingerEvent* event)
{
// Observations on Windows 10: x and y appear to be relative to 0,0 of the window client area.
// Although SDL documentation states they are 0.0 - 1.0 float values, they can actually be higher

2
app/streaming/input/input.h
View file

@ -110,6 +110,8 @@ private:
void handleAbsoluteFingerEvent(SDL_TouchFingerEvent* event);
void emulateAbsoluteFingerEvent(SDL_TouchFingerEvent* event);
void handleRelativeFingerEvent(SDL_TouchFingerEvent* event);
void performSpecialKeyCombo(KeyCombo combo);