wlroots-hyprland/backend/x11/output.c

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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <stdlib.h>
#include <string.h>
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#include <xcb/xcb.h>
#include <xcb/present.h>
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#include <xcb/xinput.h>
#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"
#include "util/signal.h"
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static void parse_xcb_setup(struct wlr_output *output,
xcb_connection_t *xcb) {
const xcb_setup_t *xcb_setup = xcb_get_setup(xcb);
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);
}
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static struct wlr_x11_output *get_x11_output_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_x11(wlr_output));
return (struct wlr_x11_output *)wlr_output;
}
static bool output_set_custom_mode(struct wlr_output *wlr_output,
int32_t width, int32_t height, int32_t refresh) {
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struct wlr_x11_output *output = get_x11_output_from_output(wlr_output);
struct wlr_x11_backend *x11 = output->x11;
const uint32_t values[] = { width, height };
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xcb_void_cookie_t cookie = xcb_configure_window_checked(
x11->xcb, output->win,
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, values);
xcb_generic_error_t *error;
if ((error = xcb_request_check(x11->xcb, cookie))) {
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wlr_log(WLR_ERROR, "Could not set window size to %dx%d\n",
width, height);
free(error);
return false;
}
return true;
}
static void output_destroy(struct wlr_output *wlr_output) {
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struct wlr_x11_output *output = get_x11_output_from_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);
wlr_egl_destroy_surface(&x11->egl, output->surf);
xcb_destroy_window(x11->xcb, output->win);
xcb_flush(x11->xcb);
free(output);
}
static bool output_attach_render(struct wlr_output *wlr_output,
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int *buffer_age) {
struct wlr_x11_output *output = get_x11_output_from_output(wlr_output);
struct wlr_x11_backend *x11 = output->x11;
return wlr_egl_make_current(&x11->egl, output->surf, buffer_age);
}
static bool output_commit(struct wlr_output *wlr_output) {
struct wlr_x11_output *output = get_x11_output_from_output(wlr_output);
struct wlr_x11_backend *x11 = output->x11;
pixman_region32_t *damage = NULL;
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_DAMAGE) {
damage = &wlr_output->pending.damage;
}
if (!wlr_egl_swap_buffers(&x11->egl, output->surf, damage)) {
return false;
}
wlr_output_send_present(wlr_output, NULL);
return true;
}
static const struct wlr_output_impl output_impl = {
.set_custom_mode = output_set_custom_mode,
.destroy = output_destroy,
.attach_render = output_attach_render,
.commit = output_commit,
};
struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {
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struct wlr_x11_backend *x11 = get_x11_backend_from_backend(backend);
if (!x11->started) {
++x11->requested_outputs;
return NULL;
}
struct wlr_x11_output *output = calloc(1, sizeof(struct wlr_x11_output));
if (output == NULL) {
return NULL;
}
output->x11 = x11;
struct wlr_output *wlr_output = &output->wlr_output;
wlr_output_init(wlr_output, &x11->backend, &output_impl, x11->wl_display);
wlr_output_update_custom_mode(&output->wlr_output, 1024, 768, 0);
wlr_output_update_enabled(wlr_output, true);
snprintf(wlr_output->name, sizeof(wlr_output->name), "X11-%zd",
++x11->last_output_num);
parse_xcb_setup(wlr_output, x11->xcb);
uint32_t mask = XCB_CW_EVENT_MASK;
uint32_t values[] = { XCB_EVENT_MASK_EXPOSURE };
output->win = xcb_generate_id(x11->xcb);
xcb_create_window(x11->xcb, XCB_COPY_FROM_PARENT, output->win,
x11->screen->root, 0, 0, wlr_output->width, wlr_output->height, 1,
XCB_WINDOW_CLASS_INPUT_OUTPUT, x11->screen->root_visual, mask, values);
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struct {
xcb_input_event_mask_t head;
xcb_input_xi_event_mask_t mask;
} xinput_mask = {
.head = { .deviceid = XCB_INPUT_DEVICE_ALL_MASTER, .mask_len = 1 },
.mask = XCB_INPUT_XI_EVENT_MASK_KEY_PRESS |
XCB_INPUT_XI_EVENT_MASK_KEY_RELEASE |
XCB_INPUT_XI_EVENT_MASK_BUTTON_PRESS |
XCB_INPUT_XI_EVENT_MASK_BUTTON_RELEASE |
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XCB_INPUT_XI_EVENT_MASK_MOTION |
XCB_INPUT_XI_EVENT_MASK_ENTER |
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,
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};
xcb_input_xi_select_events(x11->xcb, output->win, 1, &xinput_mask.head);
output->present_context = xcb_generate_id(x11->xcb);
xcb_present_select_input(x11->xcb, output->present_context, output->win,
XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY);
output->surf = wlr_egl_create_surface(&x11->egl, &output->win);
if (!output->surf) {
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wlr_log(WLR_ERROR, "Failed to create EGL surface");
free(output);
return NULL;
}
xcb_change_property(x11->xcb, XCB_PROP_MODE_REPLACE, output->win,
x11->atoms.wm_protocols, XCB_ATOM_ATOM, 32, 1,
&x11->atoms.wm_delete_window);
wlr_x11_output_set_title(wlr_output, NULL);
wl_list_insert(&x11->outputs, &output->link);
wlr_input_device_init(&output->pointer_dev, WLR_INPUT_DEVICE_POINTER,
&input_device_impl, "X11 pointer", 0, 0);
wlr_pointer_init(&output->pointer, &pointer_impl);
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);
// Start the vsync loop
xcb_present_notify_msc(x11->xcb, output->win, 0, 0, 1, 0);
xcb_map_window(x11->xcb, output->win);
xcb_flush(x11->xcb);
return wlr_output;
}
void handle_x11_present_event(struct wlr_x11_backend *x11,
xcb_present_generic_event_t *base) {
struct wlr_x11_output *output;
switch (base->evtype) {
case XCB_PRESENT_CONFIGURE_NOTIFY: {
xcb_present_configure_notify_event_t *ev =
(xcb_present_configure_notify_event_t *)base;
output = get_x11_output_from_window_id(x11, ev->window);
if (!output || output->present_context != ev->event) {
break;
}
if (ev->width <= 0 || ev->height <= 0) {
break;
}
/*
* We don't need to resize anything here ourselves.
* The EGL/OpenGL driver does that automatically.
*/
wlr_output_update_custom_mode(&output->wlr_output,
ev->width, ev->height, 0);
// Move the pointer to its new location
update_x11_pointer_position(output, output->x11->time);
break;
}
case XCB_PRESENT_COMPLETE_NOTIFY: {
xcb_present_complete_notify_event_t *ev =
(xcb_present_complete_notify_event_t *)base;
output = get_x11_output_from_window_id(x11, ev->window);
if (!output || output->present_context != ev->event) {
break;
}
wlr_output_send_frame(&output->wlr_output);
xcb_present_notify_msc(x11->xcb, output->win, 0, 0, 1, 0);
xcb_flush(x11->xcb);
break;
}
}
}
bool wlr_output_is_x11(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}
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void wlr_x11_output_set_title(struct wlr_output *output, const char *title) {
struct wlr_x11_output *x11_output = get_x11_output_from_output(output);
char wl_title[32];
if (title == NULL) {
if (snprintf(wl_title, sizeof(wl_title), "wlroots - %s", output->name) <= 0) {
return;
}
title = wl_title;
}
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xcb_change_property(x11_output->x11->xcb, XCB_PROP_MODE_REPLACE, x11_output->win,
x11_output->x11->atoms.net_wm_name, x11_output->x11->atoms.utf8_string, 8,
strlen(title), title);
}