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#include <assert.h>
#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_output *wlr_x11_output_create(struct wlr_backend *backend) {
assert(wlr_backend_is_x11(backend));
struct wlr_x11_backend *x11 = (struct wlr_x11_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->refresh = 60 * 1000000;
output->frame_delay = 16; // 60 Hz
snprintf(wlr_output->name, sizeof(wlr_output->name), "X11-%d",
wl_list_length(&x11->outputs) + 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 wlr_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;
}
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