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Use precise scrolling values

Browse source 
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
parent 72ff957e9a
commit 3b6495aefc
8 changed files with 36 additions and 27 deletions
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19
app/src/control_msg.c
View file

@ -115,12 +115,15 @@ sc_control_msg_serialize(const struct sc_control_msg *msg, unsigned char *buf) {
return 28;
case SC_CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT:
write_position(&buf[1], &msg->inject_scroll_event.position);
sc_write32be(&buf[13],
(uint32_t) msg->inject_scroll_event.hscroll);
sc_write32be(&buf[17],
(uint32_t) msg->inject_scroll_event.vscroll);
sc_write32be(&buf[21], msg->inject_scroll_event.buttons);
return 25;
// map [-1, 1] to [0, 1], then to uint16
uint16_t hscroll =
to_fixed_point_16((msg->inject_scroll_event.hscroll + 1) / 2);
uint16_t vscroll =
to_fixed_point_16((msg->inject_scroll_event.vscroll + 1) / 2);
sc_write16be(&buf[13], hscroll);
sc_write16be(&buf[15], vscroll);
sc_write32be(&buf[17], msg->inject_scroll_event.buttons);
return 21;
case SC_CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON:
buf[1] = msg->inject_keycode.action;
return 2;
@ -191,8 +194,8 @@ sc_control_msg_log(const struct sc_control_msg *msg) {
break;
}
case SC_CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT:
LOG_CMSG("scroll position=%" PRIi32 ",%" PRIi32 " hscroll=%" PRIi32
" vscroll=%" PRIi32 " buttons=%06lx",
LOG_CMSG("scroll position=%" PRIi32 ",%" PRIi32 " hscroll=%g"
" vscroll=%g buttons=%06lx",
msg->inject_scroll_event.position.point.x,
msg->inject_scroll_event.position.point.y,
msg->inject_scroll_event.hscroll,

4
app/src/control_msg.h
View file

@ -68,8 +68,8 @@ struct sc_control_msg {
} inject_touch_event;
struct {
struct sc_position position;
int32_t hscroll;
int32_t vscroll;
float hscroll;
float vscroll;
enum android_motionevent_buttons buttons;
} inject_scroll_event;
struct {

4
app/src/input_events.h
View file

@ -358,8 +358,8 @@ struct sc_mouse_click_event {
struct sc_mouse_scroll_event {
struct sc_position position;
int32_t hscroll;
int32_t vscroll;
float hscroll;
float vscroll;
uint8_t buttons_state; // bitwise-OR of sc_mouse_button values
};

9
app/src/input_manager.c
View file

@ -747,8 +747,13 @@ sc_input_manager_process_mouse_wheel(struct sc_input_manager *im,
.point = sc_screen_convert_window_to_frame_coords(im->screen,
mouse_x, mouse_y),
},
.hscroll = event->x,
.vscroll = event->y,
#if SDL_VERSION_ATLEAST(2, 0, 18)
.hscroll = CLAMP(event->preciseX, -1.0f, 1.0f),
.vscroll = CLAMP(event->preciseY, -1.0f, 1.0f),
#else
.hscroll = CLAMP(event->x, -1, 1),
.vscroll = CLAMP(event->y, -1, 1),
#endif
.buttons_state =
sc_mouse_buttons_state_from_sdl(buttons, im->forward_all_clicks),
};

10
server/src/main/java/com/genymobile/scrcpy/ControlMessage.java
View file

@ -33,8 +33,8 @@ public final class ControlMessage {
private long pointerId;
private float pressure;
private Position position;
private int hScroll;
private int vScroll;
private float hScroll;
private float vScroll;
private int copyKey;
private boolean paste;
private int repeat;
@ -71,7 +71,7 @@ public final class ControlMessage {
return msg;
}
public static ControlMessage createInjectScrollEvent(Position position, int hScroll, int vScroll, int buttons) {
public static ControlMessage createInjectScrollEvent(Position position, float hScroll, float vScroll, int buttons) {
ControlMessage msg = new ControlMessage();
msg.type = TYPE_INJECT_SCROLL_EVENT;
msg.position = position;
@ -156,11 +156,11 @@ public final class ControlMessage {
return position;
}
public int getHScroll() {
public float getHScroll() {
return hScroll;
}
public int getVScroll() {
public float getVScroll() {
return vScroll;
}

7
server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java
View file

@ -10,7 +10,7 @@ public class ControlMessageReader {
static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 13;
static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 27;
static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 24;
static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
static final int BACK_OR_SCREEN_ON_LENGTH = 1;
static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;
static final int GET_CLIPBOARD_LENGTH = 1;
@ -149,8 +149,9 @@ public class ControlMessageReader {
return null;
}
Position position = readPosition(buffer);
int hScroll = buffer.getInt();
int vScroll = buffer.getInt();
// map from [0; 1] to [-1; 1]
float hScroll = fixedPointToFloat(buffer.getShort());
float vScroll = fixedPointToFloat(buffer.getShort());
int buttons = buffer.getInt();
return ControlMessage.createInjectScrollEvent(position, hScroll, vScroll, buttons);
}

2
server/src/main/java/com/genymobile/scrcpy/Controller.java
View file

@ -223,7 +223,7 @@ public class Controller {
return device.injectEvent(event, Device.INJECT_MODE_ASYNC);
}
private boolean injectScroll(Position position, int hScroll, int vScroll, int buttons) {
private boolean injectScroll(Position position, float hScroll, float vScroll, int buttons) {
long now = SystemClock.uptimeMillis();
Point point = device.getPhysicalPoint(position);
if (point == null) {

8
server/src/test/java/com/genymobile/scrcpy/ControlMessageReaderTest.java
View file

@ -126,8 +126,8 @@ public class ControlMessageReaderTest {
dos.writeInt(1026);
dos.writeShort(1080);
dos.writeShort(1920);
dos.writeInt(1);
dos.writeInt(-1);
dos.writeShort(0x8000);
dos.writeShort(0);
dos.writeInt(1);
byte[] packet = bos.toByteArray();
@ -143,8 +143,8 @@ public class ControlMessageReaderTest {
Assert.assertEquals(1026, event.getPosition().getPoint().getY());
Assert.assertEquals(1080, event.getPosition().getScreenSize().getWidth());
Assert.assertEquals(1920, event.getPosition().getScreenSize().getHeight());
Assert.assertEquals(1, event.getHScroll());
Assert.assertEquals(-1, event.getVScroll());
Assert.assertEquals(0f, event.getHScroll(), 0f);
Assert.assertEquals(-1f, event.getVScroll(), 0f);
Assert.assertEquals(1, event.getButtons());
}