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backend/x11: refactor, prepare support for multiple outputs

This commit is contained in:
emersion 2018-03-30 21:40:43 -04:00
parent f133170ff0
commit d4f7ced6e2
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GPG Key ID: 0FDE7BE0E88F5E48
5 changed files with 365 additions and 257 deletions
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6
backend/meson.build
View File

@ -50,7 +50,11 @@ if conf_data.get('WLR_HAS_SYSTEMD', false)
endif
if conf_data.get('WLR_HAS_X11_BACKEND', false)
backend_files += files('x11/backend.c')
backend_files += files(
'x11/backend.c',
'x11/input_device.c',
'x11/output.c',
)
backend_deps += xcb_xkb
endif

300
backend/x11/backend.c
View File

@ -1,5 +1,4 @@
#define _POSIX_C_SOURCE 200112L
#include <EGL/egl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
@ -10,162 +9,66 @@
#include <wlr/config.h>
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/interfaces/wlr_pointer.h>
#include <wlr/render/egl.h>
#include <wlr/render/gles2.h>
#include <wlr/util/log.h>
#include <X11/Xlib-xcb.h>
#include <xcb/xcb.h>
#ifdef __linux__
#include <linux/input-event-codes.h>
#elif __FreeBSD__
#include <dev/evdev/input-event-codes.h>
#endif
#ifdef WLR_HAS_XCB_XKB
#include <xcb/xkb.h>
#endif
#include "backend/x11.h"
#include "util/signal.h"
#define XCB_EVENT_RESPONSE_TYPE_MASK 0x7f
static const struct wlr_backend_impl backend_impl;
static const struct wlr_output_impl output_impl;
static const struct wlr_input_device_impl input_device_impl = { 0 };
static uint32_t xcb_button_to_wl(uint32_t button) {
switch (button) {
case XCB_BUTTON_INDEX_1: return BTN_LEFT;
case XCB_BUTTON_INDEX_2: return BTN_MIDDLE;
case XCB_BUTTON_INDEX_3: return BTN_RIGHT;
// XXX: I'm not sure the scroll-wheel direction is right
case XCB_BUTTON_INDEX_4: return BTN_GEAR_UP;
case XCB_BUTTON_INDEX_5: return BTN_GEAR_DOWN;
default: return 0;
struct wlr_x11_output *x11_output_from_window_id(struct wlr_x11_backend *x11,
xcb_window_t window) {
struct wlr_x11_output *output;
wl_list_for_each(output, &x11->outputs, link) {
if (output->win == window) {
return output;
}
}
return NULL;
}
static bool handle_x11_event(struct wlr_x11_backend *x11, xcb_generic_event_t *event) {
struct wlr_x11_output *output = &x11->output;
static bool handle_x11_event(struct wlr_x11_backend *x11,
xcb_generic_event_t *event) {
if (x11_handle_input_event(x11, event)) {
return false;
}
switch (event->response_type & XCB_EVENT_RESPONSE_TYPE_MASK) {
case XCB_EXPOSE: {
wlr_output_send_frame(&output->wlr_output);
break;
}
case XCB_KEY_PRESS:
case XCB_KEY_RELEASE: {
xcb_key_press_event_t *ev = (xcb_key_press_event_t *)event;
struct wlr_event_keyboard_key key = {
.time_msec = ev->time,
.keycode = ev->detail - 8,
.state = event->response_type == XCB_KEY_PRESS ?
WLR_KEY_PRESSED : WLR_KEY_RELEASED,
.update_state = true,
};
// TODO use xcb-xkb for more precise modifiers state?
wlr_keyboard_notify_key(&x11->keyboard, &key);
x11->time = ev->time;
break;
}
case XCB_BUTTON_PRESS: {
xcb_button_press_event_t *ev = (xcb_button_press_event_t *)event;
if (ev->detail == XCB_BUTTON_INDEX_4 ||
ev->detail == XCB_BUTTON_INDEX_5) {
double delta = (ev->detail == XCB_BUTTON_INDEX_4 ? -15 : 15);
struct wlr_event_pointer_axis axis = {
.device = &x11->pointer_dev,
.time_msec = ev->time,
.source = WLR_AXIS_SOURCE_WHEEL,
.orientation = WLR_AXIS_ORIENTATION_VERTICAL,
.delta = delta,
};
wlr_signal_emit_safe(&x11->pointer.events.axis, &axis);
x11->time = ev->time;
break;
xcb_expose_event_t *ev = (xcb_expose_event_t *)event;
struct wlr_x11_output *output =
x11_output_from_window_id(x11, ev->window);
if (output != NULL) {
wlr_output_send_frame(&output->wlr_output);
}
}
/* fallthrough */
case XCB_BUTTON_RELEASE: {
xcb_button_press_event_t *ev = (xcb_button_press_event_t *)event;
if (ev->detail != XCB_BUTTON_INDEX_4 &&
ev->detail != XCB_BUTTON_INDEX_5) {
struct wlr_event_pointer_button button = {
.device = &x11->pointer_dev,
.time_msec = ev->time,
.button = xcb_button_to_wl(ev->detail),
.state = event->response_type == XCB_BUTTON_PRESS ?
WLR_BUTTON_PRESSED : WLR_BUTTON_RELEASED,
};
wlr_signal_emit_safe(&x11->pointer.events.button, &button);
}
x11->time = ev->time;
break;
}
case XCB_MOTION_NOTIFY: {
xcb_motion_notify_event_t *ev = (xcb_motion_notify_event_t *)event;
struct wlr_event_pointer_motion_absolute abs = {
.device = &x11->pointer_dev,
.time_msec = ev->time,
.x = (double)ev->event_x / output->wlr_output.width,
.y = (double)ev->event_y / output->wlr_output.height,
};
wlr_signal_emit_safe(&x11->pointer.events.motion_absolute, &abs);
x11->time = ev->time;
break;
}
case XCB_CONFIGURE_NOTIFY: {
xcb_configure_notify_event_t *ev = (xcb_configure_notify_event_t *)event;
wlr_output_update_custom_mode(&output->wlr_output, ev->width,
ev->height, 0);
// Move the pointer to its new location
xcb_query_pointer_cookie_t cookie =
xcb_query_pointer(x11->xcb_conn, output->win);
xcb_query_pointer_reply_t *pointer =
xcb_query_pointer_reply(x11->xcb_conn, cookie, NULL);
if (!pointer) {
break;
xcb_configure_notify_event_t *ev =
(xcb_configure_notify_event_t *)event;
struct wlr_x11_output *output =
x11_output_from_window_id(x11, ev->window);
if (output != NULL) {
x11_output_handle_configure_notify(output, ev);
}
struct wlr_event_pointer_motion_absolute abs = {
.device = &x11->pointer_dev,
.time_msec = x11->time,
.x = (double)pointer->root_x / output->wlr_output.width,
.y = (double)pointer->root_y / output->wlr_output.height,
};
wlr_signal_emit_safe(&x11->pointer.events.motion_absolute, &abs);
free(pointer);
break;
}
case XCB_CLIENT_MESSAGE: {
xcb_client_message_event_t *ev = (xcb_client_message_event_t *)event;
if (ev->data.data32[0] == x11->atoms.wm_delete_window) {
wl_display_terminate(x11->wl_display);
return true;
struct wlr_x11_output *output =
x11_output_from_window_id(x11, ev->window);
if (output != NULL) {
wlr_output_destroy(&output->wlr_output);
}
}
break;
}
default:
#ifdef WLR_HAS_XCB_XKB
if (x11->xkb_supported && event->response_type == x11->xkb_base_event) {
xcb_xkb_state_notify_event_t *ev =
(xcb_xkb_state_notify_event_t *)event;
wlr_keyboard_notify_modifiers(&x11->keyboard, ev->baseMods,
ev->latchedMods, ev->lockedMods, ev->lockedGroup);
}
#endif
break;
}
return false;
@ -180,64 +83,19 @@ static int x11_event(int fd, uint32_t mask, void *data) {
}
xcb_generic_event_t *e;
bool quit = false;
while (!quit && (e = xcb_poll_for_event(x11->xcb_conn))) {
quit = handle_x11_event(x11, e);
while ((e = xcb_poll_for_event(x11->xcb_conn))) {
bool quit = handle_x11_event(x11, e);
free(e);
if (quit) {
break;
}
}
return 0;
}
static int signal_frame(void *data) {
struct wlr_x11_backend *x11 = data;
wlr_output_send_frame(&x11->output.wlr_output);
wl_event_source_timer_update(x11->frame_timer, 16);
return 0;
}
static void parse_xcb_setup(struct wlr_output *output, xcb_connection_t *xcb_conn) {
const xcb_setup_t *xcb_setup = xcb_get_setup(xcb_conn);
snprintf(output->make, sizeof(output->make), "%.*s",
xcb_setup_vendor_length(xcb_setup),
xcb_setup_vendor(xcb_setup));
snprintf(output->model, sizeof(output->model), "%"PRIu16".%"PRIu16,
xcb_setup->protocol_major_version,
xcb_setup->protocol_minor_version);
}
static bool wlr_x11_backend_start(struct wlr_backend *backend) {
struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
struct wlr_x11_output *output = &x11->output;
uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
uint32_t values[2] = {
x11->screen->white_pixel,
XCB_EVENT_MASK_EXPOSURE |
XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_KEY_RELEASE |
XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
XCB_EVENT_MASK_POINTER_MOTION |
XCB_EVENT_MASK_STRUCTURE_NOTIFY
};
output->x11 = x11;
wlr_output_init(&output->wlr_output, &x11->backend, &output_impl,
x11->wl_display);
snprintf(output->wlr_output.name, sizeof(output->wlr_output.name), "X11-1");
parse_xcb_setup(&output->wlr_output, x11->xcb_conn);
output->win = xcb_generate_id(x11->xcb_conn);
xcb_create_window(x11->xcb_conn, XCB_COPY_FROM_PARENT, output->win,
x11->screen->root, 0, 0, 1024, 768, 1, XCB_WINDOW_CLASS_INPUT_OUTPUT,
x11->screen->root_visual, mask, values);
output->surf = wlr_egl_create_surface(&x11->egl, &output->win);
if (!output->surf) {
wlr_log(L_ERROR, "Failed to create EGL surface");
return false;
}
struct {
const char *name;
@ -279,17 +137,6 @@ static bool wlr_x11_backend_start(struct wlr_backend *backend) {
}
}
xcb_change_property(x11->xcb_conn, XCB_PROP_MODE_REPLACE, output->win,
x11->atoms.wm_protocols, XCB_ATOM_ATOM, 32, 1,
&x11->atoms.wm_delete_window);
char title[32];
if (snprintf(title, sizeof(title), "wlroots - %s", output->wlr_output.name)) {
xcb_change_property(x11->xcb_conn, XCB_PROP_MODE_REPLACE, output->win,
x11->atoms.net_wm_name, x11->atoms.utf8_string, 8,
strlen(title), title);
}
#ifdef WLR_HAS_XCB_XKB
const xcb_query_extension_reply_t *reply =
xcb_get_extension_data(x11->xcb_conn, &xcb_xkb_id);
@ -316,15 +163,12 @@ static bool wlr_x11_backend_start(struct wlr_backend *backend) {
}
#endif
xcb_map_window(x11->xcb_conn, output->win);
xcb_flush(x11->xcb_conn);
wlr_output_update_enabled(&output->wlr_output, true);
wlr_signal_emit_safe(&x11->backend.events.new_output, output);
wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->keyboard_dev);
wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->pointer_dev);
wl_event_source_timer_update(x11->frame_timer, 16);
for (size_t i = 0; i < x11->requested_outputs; ++i) {
x11_output_create(x11);
}
return true;
}
@ -336,8 +180,10 @@ static void wlr_x11_backend_destroy(struct wlr_backend *backend) {
struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
struct wlr_x11_output *output = &x11->output;
wlr_output_destroy(&output->wlr_output);
struct wlr_x11_output *output, *tmp;
wl_list_for_each_safe(output, tmp, &x11->outputs, link) {
wlr_output_destroy(&output->wlr_output);
}
wlr_signal_emit_safe(&x11->pointer_dev.events.destroy, &x11->pointer_dev);
wlr_signal_emit_safe(&x11->keyboard_dev.events.destroy, &x11->keyboard_dev);
@ -357,7 +203,6 @@ static void wlr_x11_backend_destroy(struct wlr_backend *backend) {
}
wl_list_remove(&x11->display_destroy.link);
wl_event_source_remove(x11->frame_timer);
wlr_egl_finish(&x11->egl);
if (x11->xlib_conn) {
@ -403,6 +248,8 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
wlr_backend_init(&x11->backend, &backend_impl);
x11->wl_display = display;
x11->requested_outputs = 1;
wl_list_init(&x11->outputs);
x11->xlib_conn = XOpenDisplay(x11_display);
if (!x11->xlib_conn) {
@ -427,8 +274,6 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
goto error_x11;
}
x11->frame_timer = wl_event_loop_add_timer(ev, signal_frame, x11);
x11->screen = xcb_setup_roots_iterator(xcb_get_setup(x11->xcb_conn)).data;
if (!wlr_egl_init(&x11->egl, EGL_PLATFORM_X11_KHR, x11->xlib_conn, NULL,
@ -439,6 +284,7 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
x11->renderer = wlr_gles2_renderer_create(&x11->backend);
if (x11->renderer == NULL) {
wlr_log(L_ERROR, "Failed to create renderer");
goto error_egl;
}
wlr_input_device_init(&x11->keyboard_dev, WLR_INPUT_DEVICE_KEYBOARD,
@ -456,6 +302,8 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
return &x11->backend;
error_egl:
wlr_egl_finish(&x11->egl);
error_event:
wl_event_source_remove(x11->event_source);
error_x11:
@ -463,59 +311,3 @@ error_x11:
free(x11);
return NULL;
}
static bool output_set_custom_mode(struct wlr_output *wlr_output, int32_t width,
int32_t height, int32_t refresh) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
const uint32_t values[] = { width, height };
xcb_configure_window(x11->xcb_conn, output->win,
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, values);
return true;
}
static void output_transform(struct wlr_output *wlr_output, enum wl_output_transform transform) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
output->wlr_output.transform = transform;
}
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
eglDestroySurface(x11->egl.display, output->surf);
xcb_destroy_window(x11->xcb_conn, output->win);
// output has been allocated on the stack, do not free it
}
static bool output_make_current(struct wlr_output *wlr_output, int *buffer_age) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
return wlr_egl_make_current(&x11->egl, output->surf, buffer_age);
}
static bool output_swap_buffers(struct wlr_output *wlr_output,
pixman_region32_t *damage) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
return wlr_egl_swap_buffers(&x11->egl, output->surf, damage);
}
static const struct wlr_output_impl output_impl = {
.set_custom_mode = output_set_custom_mode,
.transform = output_transform,
.destroy = output_destroy,
.make_current = output_make_current,
.swap_buffers = output_swap_buffers,
};
bool wlr_output_is_x11(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}
bool wlr_input_device_is_x11(struct wlr_input_device *wlr_dev) {
return wlr_dev->impl == &input_device_impl;
}

122
backend/x11/input_device.c Normal file
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@ -0,0 +1,122 @@
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/interfaces/wlr_pointer.h>
#include <wlr/util/log.h>
#include <xcb/xcb.h>
#ifdef __linux__
#include <linux/input-event-codes.h>
#elif __FreeBSD__
#include <dev/evdev/input-event-codes.h>
#endif
#include "backend/x11.h"
#include "util/signal.h"
static uint32_t xcb_button_to_wl(uint32_t button) {
switch (button) {
case XCB_BUTTON_INDEX_1: return BTN_LEFT;
case XCB_BUTTON_INDEX_2: return BTN_MIDDLE;
case XCB_BUTTON_INDEX_3: return BTN_RIGHT;
// XXX: I'm not sure the scroll-wheel direction is right
case XCB_BUTTON_INDEX_4: return BTN_GEAR_UP;
case XCB_BUTTON_INDEX_5: return BTN_GEAR_DOWN;
default: return 0;
}
}
bool x11_handle_input_event(struct wlr_x11_backend *x11,
xcb_generic_event_t *event) {
switch (event->response_type & XCB_EVENT_RESPONSE_TYPE_MASK) {
case XCB_KEY_PRESS:
case XCB_KEY_RELEASE: {
xcb_key_press_event_t *ev = (xcb_key_press_event_t *)event;
struct wlr_event_keyboard_key key = {
.time_msec = ev->time,
.keycode = ev->detail - 8,
.state = event->response_type == XCB_KEY_PRESS ?
WLR_KEY_PRESSED : WLR_KEY_RELEASED,
.update_state = true,
};
// TODO use xcb-xkb for more precise modifiers state?
wlr_keyboard_notify_key(&x11->keyboard, &key);
x11->time = ev->time;
return true;
}
case XCB_BUTTON_PRESS: {
xcb_button_press_event_t *ev = (xcb_button_press_event_t *)event;
if (ev->detail == XCB_BUTTON_INDEX_4 ||
ev->detail == XCB_BUTTON_INDEX_5) {
double delta = (ev->detail == XCB_BUTTON_INDEX_4 ? -15 : 15);
struct wlr_event_pointer_axis axis = {
.device = &x11->pointer_dev,
.time_msec = ev->time,
.source = WLR_AXIS_SOURCE_WHEEL,
.orientation = WLR_AXIS_ORIENTATION_VERTICAL,
.delta = delta,
};
wlr_signal_emit_safe(&x11->pointer.events.axis, &axis);
x11->time = ev->time;
break;
}
}
/* fallthrough */
case XCB_BUTTON_RELEASE: {
xcb_button_press_event_t *ev = (xcb_button_press_event_t *)event;
if (ev->detail != XCB_BUTTON_INDEX_4 &&
ev->detail != XCB_BUTTON_INDEX_5) {
struct wlr_event_pointer_button button = {
.device = &x11->pointer_dev,
.time_msec = ev->time,
.button = xcb_button_to_wl(ev->detail),
.state = event->response_type == XCB_BUTTON_PRESS ?
WLR_BUTTON_PRESSED : WLR_BUTTON_RELEASED,
};
wlr_signal_emit_safe(&x11->pointer.events.button, &button);
}
x11->time = ev->time;
return true;
}
case XCB_MOTION_NOTIFY: {
xcb_motion_notify_event_t *ev = (xcb_motion_notify_event_t *)event;
struct wlr_x11_output *output =
x11_output_from_window_id(x11, ev->event);
if (output == NULL) {
return false;
}
struct wlr_event_pointer_motion_absolute abs = {
.device = &x11->pointer_dev,
.time_msec = ev->time,
.x = (double)ev->event_x / output->wlr_output.width,
.y = (double)ev->event_y / output->wlr_output.height,
};
wlr_signal_emit_safe(&x11->pointer.events.motion_absolute, &abs);
x11->time = ev->time;
return true;
}
default:
#ifdef WLR_HAS_XCB_XKB
if (x11->xkb_supported && event->response_type == x11->xkb_base_event) {
xcb_xkb_state_notify_event_t *ev =
(xcb_xkb_state_notify_event_t *)event;
wlr_keyboard_notify_modifiers(&x11->keyboard, ev->baseMods,
ev->latchedMods, ev->lockedMods, ev->lockedGroup);
return true;
}
#endif
break;
}
return false;
}
const struct wlr_input_device_impl input_device_impl = { 0 };
bool wlr_input_device_is_x11(struct wlr_input_device *wlr_dev) {
return wlr_dev->impl == &input_device_impl;
}

170
backend/x11/output.c Normal file
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@ -0,0 +1,170 @@
#include <stdlib.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/util/log.h>
#include "backend/x11.h"
#include "util/signal.h"
static int signal_frame(void *data) {
struct wlr_x11_output *output = data;
wlr_output_send_frame(&output->wlr_output);
wl_event_source_timer_update(output->frame_timer, output->frame_delay);
return 0;
}
static void parse_xcb_setup(struct wlr_output *output, xcb_connection_t *xcb_conn) {
const xcb_setup_t *xcb_setup = xcb_get_setup(xcb_conn);
snprintf(output->make, sizeof(output->make), "%.*s",
xcb_setup_vendor_length(xcb_setup),
xcb_setup_vendor(xcb_setup));
snprintf(output->model, sizeof(output->model), "%"PRIu16".%"PRIu16,
xcb_setup->protocol_major_version,
xcb_setup->protocol_minor_version);
}
static bool output_set_custom_mode(struct wlr_output *wlr_output, int32_t width,
int32_t height, int32_t refresh) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
wlr_output_update_custom_mode(&output->wlr_output, wlr_output->width,
wlr_output->height, refresh);
output->frame_delay = 1000000 / refresh;
const uint32_t values[] = { width, height };
xcb_configure_window(x11->xcb_conn, output->win,
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, values);
return true;
}
static void output_transform(struct wlr_output *wlr_output,
enum wl_output_transform transform) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
output->wlr_output.transform = transform;
}
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
wl_list_remove(&output->link);
wl_event_source_remove(output->frame_timer);
eglDestroySurface(x11->egl.display, output->surf);
xcb_destroy_window(x11->xcb_conn, output->win);
free(output);
}
static bool output_make_current(struct wlr_output *wlr_output, int *buffer_age) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
return wlr_egl_make_current(&x11->egl, output->surf, buffer_age);
}
static bool output_swap_buffers(struct wlr_output *wlr_output,
pixman_region32_t *damage) {
struct wlr_x11_output *output = (struct wlr_x11_output *)wlr_output;
struct wlr_x11_backend *x11 = output->x11;
return wlr_egl_swap_buffers(&x11->egl, output->surf, damage);
}
static const struct wlr_output_impl output_impl = {
.set_custom_mode = output_set_custom_mode,
.transform = output_transform,
.destroy = output_destroy,
.make_current = output_make_current,
.swap_buffers = output_swap_buffers,
};
struct wlr_x11_output *x11_output_create(struct wlr_x11_backend *x11) {
struct wlr_x11_output *output = calloc(1, sizeof(struct wlr_x11_output));
if (output == NULL) {
return NULL;
}
output->x11 = x11;
output->frame_delay = 16; // 60 Hz
struct wlr_output *wlr_output = &output->wlr_output;
wlr_output_init(wlr_output, &x11->backend, &output_impl, x11->wl_display);
snprintf(wlr_output->name, sizeof(wlr_output->name), "X11-1");
parse_xcb_setup(wlr_output, x11->xcb_conn);
uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
uint32_t values[2] = {
x11->screen->white_pixel,
XCB_EVENT_MASK_EXPOSURE |
XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_KEY_RELEASE |
XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
XCB_EVENT_MASK_POINTER_MOTION |
XCB_EVENT_MASK_STRUCTURE_NOTIFY
};
output->win = xcb_generate_id(x11->xcb_conn);
xcb_create_window(x11->xcb_conn, XCB_COPY_FROM_PARENT, output->win,
x11->screen->root, 0, 0, 1024, 768, 1, XCB_WINDOW_CLASS_INPUT_OUTPUT,
x11->screen->root_visual, mask, values);
output->surf = wlr_egl_create_surface(&x11->egl, &output->win);
if (!output->surf) {
wlr_log(L_ERROR, "Failed to create EGL surface");
free(output);
return NULL;
}
xcb_change_property(x11->xcb_conn, XCB_PROP_MODE_REPLACE, output->win,
x11->atoms.wm_protocols, XCB_ATOM_ATOM, 32, 1,
&x11->atoms.wm_delete_window);
char title[32];
if (snprintf(title, sizeof(title), "wlroots - %s", wlr_output->name)) {
xcb_change_property(x11->xcb_conn, XCB_PROP_MODE_REPLACE, output->win,
x11->atoms.net_wm_name, x11->atoms.utf8_string, 8,
strlen(title), title);
}
xcb_map_window(x11->xcb_conn, output->win);
xcb_flush(x11->xcb_conn);
struct wl_event_loop *ev = wl_display_get_event_loop(x11->wl_display);
output->frame_timer = wl_event_loop_add_timer(ev, signal_frame, output);
wl_event_source_timer_update(output->frame_timer, output->frame_delay);
wlr_output_update_enabled(wlr_output, true);
wl_list_insert(&x11->outputs, &output->link);
wlr_signal_emit_safe(&x11->backend.events.new_output, wlr_output);
return output;
}
void x11_output_handle_configure_notify(struct wlr_x11_output *output,
xcb_configure_notify_event_t *ev) {
struct wlr_x11_backend *x11 = output->x11;
wlr_output_update_custom_mode(&output->wlr_output, ev->width,
ev->height, output->wlr_output.refresh);
// Move the pointer to its new location
xcb_query_pointer_cookie_t cookie =
xcb_query_pointer(x11->xcb_conn, output->win);
xcb_query_pointer_reply_t *pointer =
xcb_query_pointer_reply(x11->xcb_conn, cookie, NULL);
if (!pointer) {
return;
}
struct wlr_event_pointer_motion_absolute abs = {
.device = &x11->pointer_dev,
.time_msec = x11->time,
.x = (double)pointer->root_x / output->wlr_output.width,
.y = (double)pointer->root_y / output->wlr_output.height,
};
wlr_signal_emit_safe(&x11->pointer.events.motion_absolute, &abs);
free(pointer);
}
bool wlr_output_is_x11(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}

24
include/backend/x11.h
View File

@ -6,15 +6,23 @@
#include <wlr/render/egl.h>
#include <X11/Xlib-xcb.h>
#include <xcb/xcb.h>
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/interfaces/wlr_output.h>
#define XCB_EVENT_RESPONSE_TYPE_MASK 0x7f
struct wlr_x11_backend;
struct wlr_x11_output {
struct wlr_output wlr_output;
struct wlr_x11_backend *x11;
struct wl_list link; // wlr_x11_backend::outputs
xcb_window_t win;
EGLSurface surf;
struct wl_event_source *frame_timer;
int frame_delay;
};
struct wlr_x11_backend {
@ -25,7 +33,8 @@ struct wlr_x11_backend {
xcb_connection_t *xcb_conn;
xcb_screen_t *screen;
struct wlr_x11_output output;
size_t requested_outputs;
struct wl_list outputs; // wlr_x11_output::link
struct wlr_keyboard keyboard;
struct wlr_input_device keyboard_dev;
@ -36,7 +45,6 @@ struct wlr_x11_backend {
struct wlr_egl egl;
struct wlr_renderer *renderer;
struct wl_event_source *event_source;
struct wl_event_source *frame_timer;
struct {
xcb_atom_t wm_protocols;
@ -57,4 +65,16 @@ struct wlr_x11_backend {
struct wl_listener display_destroy;
};
struct wlr_x11_output *x11_output_from_window_id(struct wlr_x11_backend *x11,
xcb_window_t window);
const struct wlr_input_device_impl input_device_impl;
bool x11_handle_input_event(struct wlr_x11_backend *x11,
xcb_generic_event_t *event);
struct wlr_x11_output *x11_output_create(struct wlr_x11_backend *x11);
void x11_output_handle_configure_notify(struct wlr_x11_output *output,
xcb_configure_notify_event_t *event);
#endif