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Scale mouse events

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The video screen size on the client may differ from the real device
screen size (e.g. the video stream may be scaled down). As a
consequence, mouse events must be scaled to match the real device
coordinates.

For this purpose, make the client send the video screen size along with
the absolute pointer location, and the server scale the location to
match the real device size before injecting mouse events.
This commit is contained in:
Romain Vimont
2018-01-22 16:50:08 +01:00
parent 11a60e5767
commit 8984c1a7c4
13 changed files with 246 additions and 96 deletions
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13
app/src/controlevent.c
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@@ -17,6 +17,13 @@ static inline void write32(Uint8 *buf, Uint32 value) {
buf[3] = value;
}
static void write_point(Uint8 *buf, const struct point *point) {
write16(&buf[0], point->position.x);
write16(&buf[2], point->position.y);
write16(&buf[4], point->screen_size.width);
write16(&buf[6], point->screen_size.height);
}
int control_event_serialize(const struct control_event *event, unsigned char *buf) {
buf[0] = event->type;
switch (event->type) {
@@ -38,12 +45,10 @@ int control_event_serialize(const struct control_event *event, unsigned char *bu
case CONTROL_EVENT_TYPE_MOUSE:
buf[1] = event->mouse_event.action;
write32(&buf[2], event->mouse_event.buttons);
write32(&buf[6], (Uint32) event->mouse_event.x);
write32(&buf[10], (Uint32) event->mouse_event.y);
write_point(&buf[6], &event->mouse_event.point);
return 14;
case CONTROL_EVENT_TYPE_SCROLL:
write32(&buf[1], (Uint32) event->scroll_event.x);
write32(&buf[5], (Uint32) event->scroll_event.y);
write_point(&buf[1], &event->scroll_event.point);
write32(&buf[9], (Uint32) event->scroll_event.hscroll);
write32(&buf[13], (Uint32) event->scroll_event.vscroll);
return 17;