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backends/x11: Touch support

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Closes #1749
master
Sebastian Krzyszkowiak 5 years ago committed by Drew DeVault
parent 2d4bc66f11
commit 415267ac13
3 changed files with 143 additions and 1 deletions
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118
backend/x11/input_device.c
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@ -11,6 +11,7 @@
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/interfaces/wlr_pointer.h>
#include <wlr/interfaces/wlr_touch.h>
#include <wlr/util/log.h>
#include "backend/x11.h"
@ -66,6 +67,51 @@ static void send_pointer_position_event(struct wlr_x11_output *output,
wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
}
static void send_touch_down_event(struct wlr_x11_output *output,
int16_t x, int16_t y, int32_t touch_id, xcb_timestamp_t time) {
struct wlr_event_touch_down ev = {
.device = &output->touch_dev,
.time_msec = time,
.x = (double)x / output->wlr_output.width,
.y = (double)y / output->wlr_output.height,
.touch_id = touch_id,
};
wlr_signal_emit_safe(&output->touch.events.down, &ev);
}
static void send_touch_motion_event(struct wlr_x11_output *output,
int16_t x, int16_t y, int32_t touch_id, xcb_timestamp_t time) {
struct wlr_event_touch_motion ev = {
.device = &output->touch_dev,
.time_msec = time,
.x = (double)x / output->wlr_output.width,
.y = (double)y / output->wlr_output.height,
.touch_id = touch_id,
};
wlr_signal_emit_safe(&output->touch.events.motion, &ev);
}
static void send_touch_up_event(struct wlr_x11_output *output,
int32_t touch_id, xcb_timestamp_t time) {
struct wlr_event_touch_up ev = {
.device = &output->touch_dev,
.time_msec = time,
.touch_id = touch_id,
};
wlr_signal_emit_safe(&output->touch.events.up, &ev);
}
static struct wlr_x11_touchpoint* get_touchpoint_from_x11_touch_id(struct wlr_x11_output *output,
uint32_t id) {
struct wlr_x11_touchpoint *touchpoint;
wl_list_for_each(touchpoint, &output->touchpoints, link) {
if (touchpoint->x11_id == id) {
return touchpoint;
}
}
return NULL;
}
void handle_x11_xinput_event(struct wlr_x11_backend *x11,
xcb_ge_generic_event_t *event) {
struct wlr_x11_output *output;
@ -194,6 +240,70 @@ void handle_x11_xinput_event(struct wlr_x11_backend *x11,
}
break;
}
case XCB_INPUT_TOUCH_BEGIN: {
xcb_input_touch_begin_event_t *ev = (xcb_input_touch_begin_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
int32_t id = 0;
if (!wl_list_empty(&output->touchpoints)) {
struct wlr_x11_touchpoint *last_touchpoint = wl_container_of(
output->touchpoints.next, last_touchpoint, link);
id = last_touchpoint->wayland_id + 1;
}
struct wlr_x11_touchpoint *touchpoint = calloc(1, sizeof(struct wlr_x11_touchpoint));
touchpoint->x11_id = ev->detail;
touchpoint->wayland_id = id;
wl_list_init(&touchpoint->link);
wl_list_insert(&output->touchpoints, &touchpoint->link);
send_touch_down_event(output, ev->event_x >> 16,
ev->event_y >> 16, touchpoint->wayland_id, ev->time);
x11->time = ev->time;
break;
}
case XCB_INPUT_TOUCH_END: {
xcb_input_touch_end_event_t *ev = (xcb_input_touch_end_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
struct wlr_x11_touchpoint *touchpoint = get_touchpoint_from_x11_touch_id(output, ev->detail);
if (!touchpoint) {
return;
}
send_touch_up_event(output, touchpoint->wayland_id, ev->time);
x11->time = ev->time;
wl_list_remove(&touchpoint->link);
free(touchpoint);
break;
}
case XCB_INPUT_TOUCH_UPDATE: {
xcb_input_touch_update_event_t *ev = (xcb_input_touch_update_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
struct wlr_x11_touchpoint *touchpoint = get_touchpoint_from_x11_touch_id(output, ev->detail);
if (!touchpoint) {
return;
}
send_touch_motion_event(output, ev->event_x >> 16,
ev->event_y >> 16, touchpoint->wayland_id, ev->time);
x11->time = ev->time;
break;
}
}
}
@ -221,6 +331,14 @@ const struct wlr_pointer_impl pointer_impl = {
.destroy = pointer_destroy,
};
static void touch_destroy(struct wlr_touch *wlr_touch) {
// Don't free the touch, it's on the stack
}
const struct wlr_touch_impl touch_impl = {
.destroy = touch_destroy,
};
void update_x11_pointer_position(struct wlr_x11_output *output,
xcb_timestamp_t time) {
struct wlr_x11_backend *x11 = output->x11;

15
backend/x11/output.c
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@ -9,6 +9,7 @@
#include <wlr/interfaces/wlr_output.h>
#include <wlr/interfaces/wlr_pointer.h>
#include <wlr/interfaces/wlr_touch.h>
#include <wlr/util/log.h>
#include "backend/x11.h"
@ -80,6 +81,7 @@ static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_x11_backend *x11 = output->x11;
wlr_input_device_destroy(&output->pointer_dev);
wlr_input_device_destroy(&output->touch_dev);
wl_list_remove(&output->link);
wl_event_source_remove(output->frame_timer);
@ -167,7 +169,10 @@ struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {
XCB_INPUT_XI_EVENT_MASK_BUTTON_RELEASE |
XCB_INPUT_XI_EVENT_MASK_MOTION |
XCB_INPUT_XI_EVENT_MASK_ENTER |
XCB_INPUT_XI_EVENT_MASK_LEAVE,
XCB_INPUT_XI_EVENT_MASK_LEAVE |
XCB_INPUT_XI_EVENT_MASK_TOUCH_BEGIN |
XCB_INPUT_XI_EVENT_MASK_TOUCH_END |
XCB_INPUT_XI_EVENT_MASK_TOUCH_UPDATE,
};
xcb_input_xi_select_events(x11->xcb, output->win, 1, &xinput_mask.head);
@ -201,8 +206,16 @@ struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {
output->pointer_dev.pointer = &output->pointer;
output->pointer_dev.output_name = strdup(wlr_output->name);
wlr_input_device_init(&output->touch_dev, WLR_INPUT_DEVICE_TOUCH,
&input_device_impl, "X11 touch", 0, 0);
wlr_touch_init(&output->touch, &touch_impl);
output->touch_dev.touch = &output->touch;
output->touch_dev.output_name = strdup(wlr_output->name);
wl_list_init(&output->touchpoints);
wlr_signal_emit_safe(&x11->backend.events.new_output, wlr_output);
wlr_signal_emit_safe(&x11->backend.events.new_input, &output->pointer_dev);
wlr_signal_emit_safe(&x11->backend.events.new_input, &output->touch_dev);
return wlr_output;
}

11
include/backend/x11.h
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@ -31,12 +31,22 @@ struct wlr_x11_output {
struct wlr_pointer pointer;
struct wlr_input_device pointer_dev;
struct wlr_touch touch;
struct wlr_input_device touch_dev;
struct wl_list touchpoints; // wlr_x11_touchpoint::link
struct wl_event_source *frame_timer;
int frame_delay;
bool cursor_hidden;
};
struct wlr_x11_touchpoint {
uint32_t x11_id;
int wayland_id;
struct wl_list link; // wlr_x11_output::touch_points
};
struct wlr_x11_backend {
struct wlr_backend backend;
struct wl_display *wl_display;
@ -79,6 +89,7 @@ struct wlr_x11_output *get_x11_output_from_window_id(
extern const struct wlr_keyboard_impl keyboard_impl;
extern const struct wlr_pointer_impl pointer_impl;
extern const struct wlr_touch_impl touch_impl;
extern const struct wlr_input_device_impl input_device_impl;
void handle_x11_xinput_event(struct wlr_x11_backend *x11,

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