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Use precise scrolling values

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Since SDL 2.0.18, the amount scrolled horizontally or vertically is
exposed as a float (between 0 and 1). Forward a precise value to the
Android device when possible.

Refs <https://wiki.libsdl.org/SDL_MouseWheelEvent>
Fixes #3363 <https://github.com/Genymobile/scrcpy/issues/3363>
PR #3369 <https://github.com/Genymobile/scrcpy/pull/3369>

Signed-off-by: Romain Vimont <rom@rom1v.com>
This commit is contained in:
Simon Chan 2022-07-03 07:02:17 +00:00 • committed by Romain Vimont
commit 57056d078d
9 changed files with 37 additions and 30 deletions
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6
app/tests/test_control_msg_serialize.c
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@ -132,14 +132,14 @@ static void test_serialize_inject_scroll_event(void) {
unsigned char buf[SC_CONTROL_MSG_MAX_SIZE];
size_t size = sc_control_msg_serialize(&msg, buf);
assert(size == 25);
assert(size == 21);
const unsigned char expected[] = {
SC_CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT,
0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x04, 0x02, // 260 1026
0x04, 0x38, 0x07, 0x80, // 1080 1920
0x00, 0x00, 0x00, 0x01, // 1
0xFF, 0xFF, 0xFF, 0xFF, // -1
0x7F, 0xFF, // 1 (float encoded as i16)
0x80, 0x00, // -1 (float encoded as i16)
0x00, 0x00, 0x00, 0x01, // 1
};
assert(!memcmp(buf, expected, sizeof(expected)));