wlroots/examples/compositor.c

669 lines
22 KiB
C

#define _POSIX_C_SOURCE 199309L
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/mman.h>
#include <wayland-server.h>
// TODO: BSD et al
#include <linux/input-event-codes.h>
#include <wlr/backend.h>
#include <wlr/backend/session.h>
#include <wlr/render.h>
#include <wlr/render/matrix.h>
#include <wlr/render/gles2.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/types/wlr_wl_shell.h>
#include <wlr/types/wlr_xdg_shell_v6.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_data_device_manager.h>
#include <wlr/types/wlr_gamma_control.h>
#include "wlr/types/wlr_compositor.h"
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/xwayland.h>
#include <xkbcommon/xkbcommon.h>
#include <wlr/util/log.h>
#include "config.h"
#include "shared.h"
#include <assert.h>
struct sample_state;
struct example_xdg_surface_v6 {
struct wlr_xdg_surface_v6 *surface;
struct sample_state *sample;
// position of the wlr_surface in the layout
struct {
int lx;
int ly;
} position;
struct wl_listener destroy_listener;
struct wl_listener ping_timeout_listener;
struct wl_listener request_minimize_listener;
struct wl_listener request_move_listener;
struct wl_listener request_resize_listener;
struct wl_listener request_show_window_menu_listener;
};
struct input_event_cache {
uint32_t serial;
struct wlr_cursor *cursor;
struct wlr_input_device *device;
};
struct motion_context {
struct example_xdg_surface_v6 *surface;
int off_x, off_y;
};
struct sample_state {
struct wlr_renderer *renderer;
struct compositor_state *compositor;
struct wlr_compositor *wlr_compositor;
struct wlr_wl_shell *wl_shell;
struct wlr_seat *wl_seat;
struct wlr_xdg_shell_v6 *xdg_shell;
struct wlr_data_device_manager *data_device_manager;
struct wl_resource *focus;
struct wlr_xwayland *xwayland;
struct wlr_gamma_control_manager *gamma_control_manager;
bool mod_down;
struct motion_context motion_context;
struct example_config *config;
struct wlr_output_layout *layout;
struct wlr_cursor *cursor;
struct wlr_xcursor *xcursor;
// Ring buffer
int input_cache_idx;
struct input_event_cache input_cache[16];
struct wl_listener cursor_motion;
struct wl_listener cursor_motion_absolute;
struct wl_listener cursor_button;
struct wl_listener cursor_axis;
struct wl_listener tool_axis;
struct wl_listener tool_tip;
struct wl_listener tool_button;
struct wl_listener new_xdg_surface_v6;
struct wlr_xdg_surface_v6 *focused_surface;
};
static void example_set_focused_surface(struct sample_state *sample,
struct wlr_xdg_surface_v6 *surface) {
if (sample->focused_surface == surface) {
return;
}
// set activated state of the xdg surfaces
struct wlr_xdg_surface_v6 *xdg_surface;
struct wlr_xdg_client_v6 *xdg_client;
wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
if (!xdg_surface->configured ||
xdg_surface->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
continue;
}
wlr_xdg_toplevel_v6_set_activated(xdg_surface,
xdg_surface == surface);
}
}
if (surface) {
wlr_seat_keyboard_enter(sample->wl_seat, surface->surface);
} else {
wlr_seat_keyboard_clear_focus(sample->wl_seat);
}
sample->focused_surface = surface;
}
/*
* Convert timespec to milliseconds
*/
static inline int64_t timespec_to_msec(const struct timespec *a) {
return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
}
static void output_frame_handle_surface(struct sample_state *sample,
struct wlr_output *wlr_output, struct timespec *ts,
struct wl_resource *_res, int ox, int oy) {
struct wlr_surface *surface = wl_resource_get_user_data(_res);
float matrix[16];
float transform[16];
wlr_surface_flush_damage(surface);
if (surface->texture->valid) {
wlr_matrix_translate(&transform, ox, oy, 0);
wlr_surface_get_matrix(surface, &matrix,
&wlr_output->transform_matrix, &transform);
wlr_render_with_matrix(sample->renderer, surface->texture, &matrix);
struct wlr_frame_callback *cb, *cnext;
wl_list_for_each_safe(cb, cnext, &surface->frame_callback_list, link) {
wl_callback_send_done(cb->resource, timespec_to_msec(ts));
wl_resource_destroy(cb->resource);
}
}
}
static void handle_xdg_surface_v6_ping_timeout(struct wl_listener *listener,
void *data) {
struct wlr_xdg_surface_v6 *surface = data;
wlr_log(L_DEBUG, "got ping timeout for surface: %s", surface->title);
}
static void handle_xdg_surface_v6_destroy(struct wl_listener *listener,
void *data) {
struct example_xdg_surface_v6 *example_surface =
wl_container_of(listener, example_surface, destroy_listener);
wl_list_remove(&example_surface->destroy_listener.link);
wl_list_remove(&example_surface->ping_timeout_listener.link);
wl_list_remove(&example_surface->request_move_listener.link);
wl_list_remove(&example_surface->request_resize_listener.link);
wl_list_remove(&example_surface->request_show_window_menu_listener.link);
wl_list_remove(&example_surface->request_minimize_listener.link);
free(example_surface);
}
static void handle_xdg_surface_v6_request_move(struct wl_listener *listener,
void *data) {
struct example_xdg_surface_v6 *esurface =
wl_container_of(listener, esurface, request_move_listener);
struct wlr_xdg_toplevel_v6_move_event *e = data;
struct sample_state *sample = esurface->sample;
struct input_event_cache *event = NULL;
for (size_t i = 0;
i < sizeof(sample->input_cache) / sizeof(sample->input_cache[0]);
++i) {
if (sample->input_cache[i].cursor
&& sample->input_cache[i].serial == e->serial) {
event = &sample->input_cache[i];
break;
}
}
if (!event || sample->motion_context.surface) {
return;
}
sample->motion_context.surface = esurface;
sample->motion_context.off_x = sample->cursor->x - esurface->position.lx;
sample->motion_context.off_y = sample->cursor->y - esurface->position.ly;
wlr_seat_pointer_clear_focus(sample->wl_seat);
}
static void handle_xdg_surface_v6_request_resize(struct wl_listener *listener,
void *data) {
struct example_xdg_surface_v6 *example_surface =
wl_container_of(listener, example_surface, request_resize_listener);
struct wlr_xdg_toplevel_v6_resize_event *e = data;
wlr_log(L_DEBUG, "TODO: surface requested resize: %s", e->surface->title);
}
static void handle_xdg_surface_v6_request_show_window_menu(
struct wl_listener *listener, void *data) {
struct example_xdg_surface_v6 *example_surface =
wl_container_of(listener, example_surface,
request_show_window_menu_listener);
struct wlr_xdg_toplevel_v6_show_window_menu_event *e = data;
wlr_log(L_DEBUG, "TODO: surface requested to show window menu: %s",
e->surface->title);
}
static void handle_xdg_surface_v6_request_minimize(
struct wl_listener *listener, void *data) {
struct example_xdg_surface_v6 *example_surface =
wl_container_of(listener, example_surface, request_minimize_listener);
wlr_log(L_DEBUG, "TODO: surface requested to be minimized: %s",
example_surface->surface->title);
}
static void handle_new_xdg_surface_v6(struct wl_listener *listener,
void *data) {
struct sample_state *sample_state =
wl_container_of(listener, sample_state, new_xdg_surface_v6);
struct wlr_xdg_surface_v6 *surface = data;
wlr_log(L_DEBUG, "new xdg surface: title=%s, app_id=%s",
surface->title, surface->app_id);
wlr_xdg_surface_v6_ping(surface);
struct example_xdg_surface_v6 *esurface =
calloc(1, sizeof(struct example_xdg_surface_v6));
if (esurface == NULL) {
return;
}
esurface->sample = sample_state;
esurface->surface = surface;
// TODO sensible default position
esurface->position.lx = 300;
esurface->position.ly = 300;
surface->data = esurface;
wl_signal_add(&surface->events.destroy, &esurface->destroy_listener);
esurface->destroy_listener.notify = handle_xdg_surface_v6_destroy;
wl_signal_add(&surface->events.ping_timeout,
&esurface->ping_timeout_listener);
esurface->ping_timeout_listener.notify = handle_xdg_surface_v6_ping_timeout;
wl_signal_add(&surface->events.request_move,
&esurface->request_move_listener);
esurface->request_move_listener.notify = handle_xdg_surface_v6_request_move;
wl_signal_add(&surface->events.request_resize,
&esurface->request_resize_listener);
esurface->request_resize_listener.notify =
handle_xdg_surface_v6_request_resize;
wl_signal_add(&surface->events.request_show_window_menu,
&esurface->request_show_window_menu_listener);
esurface->request_show_window_menu_listener.notify =
handle_xdg_surface_v6_request_show_window_menu;
wl_signal_add(&surface->events.request_minimize,
&esurface->request_minimize_listener);
esurface->request_minimize_listener.notify =
handle_xdg_surface_v6_request_minimize;
}
static void handle_output_frame(struct output_state *output,
struct timespec *ts) {
struct compositor_state *state = output->compositor;
struct sample_state *sample = state->data;
struct wlr_output *wlr_output = output->output;
wlr_output_make_current(wlr_output);
wlr_renderer_begin(sample->renderer, wlr_output);
struct wlr_wl_shell_surface *wl_shell_surface;
wl_list_for_each(wl_shell_surface, &sample->wl_shell->surfaces, link) {
output_frame_handle_surface(sample, wlr_output, ts,
wl_shell_surface->resource, 200, 200);
}
struct wlr_xdg_surface_v6 *xdg_surface;
struct wlr_xdg_client_v6 *xdg_client;
wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
if (!xdg_surface->configured) {
continue;
}
struct example_xdg_surface_v6 *esurface = xdg_surface->data;
assert(esurface);
int width = xdg_surface->surface->current.buffer_width;
int height = xdg_surface->surface->current.buffer_height;
bool intersects_output = wlr_output_layout_intersects(
sample->layout, wlr_output,
esurface->position.lx, esurface->position.ly,
esurface->position.lx + width, esurface->position.ly + height);
if (intersects_output) {
double ox = esurface->position.lx, oy = esurface->position.ly;
wlr_output_layout_output_coords(sample->layout, wlr_output,
&ox, &oy);
output_frame_handle_surface(sample, wlr_output, ts,
xdg_surface->surface->resource, ox, oy);
}
}
}
struct wlr_x11_window *x11_window;
wl_list_for_each(x11_window, &sample->xwayland->displayable_windows, link) {
output_frame_handle_surface(sample, wlr_output, ts,
x11_window->surface, 200, 200);
}
wlr_renderer_end(sample->renderer);
wlr_output_swap_buffers(wlr_output);
}
static void handle_keyboard_key(struct keyboard_state *keyboard,
uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state,
uint64_t time_usec) {
struct compositor_state *state = keyboard->compositor;
struct sample_state *sample = state->data;
if (sym == XKB_KEY_Super_L || sym == XKB_KEY_Super_R) {
sample->mod_down = key_state == WLR_KEY_PRESSED;
}
}
static struct wlr_xdg_surface_v6 *example_xdg_surface_at(
struct sample_state *sample, int lx, int ly) {
struct wlr_xdg_surface_v6 *xdg_surface;
struct wlr_xdg_client_v6 *xdg_client;
wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
if (!xdg_surface->configured) {
continue;
}
struct example_xdg_surface_v6 *esurface = xdg_surface->data;
double window_x = esurface->position.lx + xdg_surface->geometry->x;
double window_y = esurface->position.ly + xdg_surface->geometry->y;
if (sample->cursor->x >= window_x &&
sample->cursor->y >= window_y &&
sample->cursor->x <= window_x +
xdg_surface->geometry->width &&
sample->cursor->y <= window_y +
xdg_surface->geometry->height) {
return xdg_surface;
}
}
}
return NULL;
}
static void update_pointer_position(struct sample_state *sample, uint32_t time) {
if (sample->motion_context.surface) {
struct example_xdg_surface_v6 *surface;
surface = sample->motion_context.surface;
surface->position.lx = sample->cursor->x - sample->motion_context.off_x;
surface->position.ly = sample->cursor->y - sample->motion_context.off_y;
return;
}
struct wlr_xdg_surface_v6 *surface = example_xdg_surface_at(sample,
sample->cursor->x, sample->cursor->y);
if (surface) {
struct example_xdg_surface_v6 *esurface = surface->data;
double sx = sample->cursor->x - esurface->position.lx;
double sy = sample->cursor->y - esurface->position.ly;
// TODO z-order
wlr_seat_pointer_enter(sample->wl_seat, surface->surface, sx, sy);
wlr_seat_pointer_send_motion(sample->wl_seat, time, sx, sy);
} else {
wlr_seat_pointer_clear_focus(sample->wl_seat);
}
}
static void handle_cursor_motion(struct wl_listener *listener, void *data) {
struct sample_state *sample =
wl_container_of(listener, sample, cursor_motion);
struct wlr_event_pointer_motion *event = data;
wlr_cursor_move(sample->cursor, event->device, event->delta_x,
event->delta_y);
update_pointer_position(sample, (uint32_t)event->time_usec);
}
static void handle_cursor_motion_absolute(struct wl_listener *listener,
void *data) {
struct sample_state *sample =
wl_container_of(listener, sample, cursor_motion_absolute);
struct wlr_event_pointer_motion_absolute *event = data;
wlr_cursor_warp_absolute(sample->cursor, event->device,
event->x_mm / event->width_mm, event->y_mm / event->height_mm);
update_pointer_position(sample, (uint32_t)event->time_usec);
}
static void handle_cursor_axis(struct wl_listener *listener, void *data) {
struct sample_state *sample =
wl_container_of(listener, sample, cursor_axis);
struct wlr_event_pointer_axis *event = data;
wlr_seat_pointer_send_axis(sample->wl_seat, event->time_sec,
event->orientation, event->delta);
}
static void handle_cursor_button(struct wl_listener *listener, void *data) {
struct sample_state *sample =
wl_container_of(listener, sample, cursor_button);
struct wlr_event_pointer_button *event = data;
struct wlr_xdg_surface_v6 *surface =
example_xdg_surface_at(sample, sample->cursor->x, sample->cursor->y);
uint32_t serial = wlr_seat_pointer_send_button(sample->wl_seat,
(uint32_t)event->time_usec, event->button, event->state);
int i;
switch (event->state) {
case WLR_BUTTON_RELEASED:
if (sample->motion_context.surface) {
sample->motion_context.surface = NULL;
}
break;
case WLR_BUTTON_PRESSED:
i = sample->input_cache_idx;
sample->input_cache[i].serial = serial;
sample->input_cache[i].cursor = sample->cursor;
sample->input_cache[i].device = event->device;
sample->input_cache_idx = (i + 1)
% (sizeof(sample->input_cache) / sizeof(sample->input_cache[0]));
example_set_focused_surface(sample, surface);
wlr_log(L_DEBUG, "Stored event %d at %d", serial, i);
if (sample->mod_down && event->button == BTN_LEFT) {
struct example_xdg_surface_v6 *esurface = surface->data;
sample->motion_context.surface = esurface;
sample->motion_context.off_x = sample->cursor->x - esurface->position.lx;
sample->motion_context.off_y = sample->cursor->y - esurface->position.ly;
wlr_seat_pointer_clear_focus(sample->wl_seat);
}
break;
}
}
static void handle_tool_axis(struct wl_listener *listener, void *data) {
struct sample_state *sample =
wl_container_of(listener, sample, tool_axis);
struct wlr_event_tablet_tool_axis *event = data;
if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X) &&
(event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
wlr_cursor_warp_absolute(sample->cursor, event->device,
event->x_mm / event->width_mm, event->y_mm / event->height_mm);
update_pointer_position(sample, (uint32_t)event->time_usec);
}
}
static void handle_tool_tip(struct wl_listener *listener, void *data) {
struct sample_state *sample =
wl_container_of(listener, sample, tool_tip);
struct wlr_event_tablet_tool_tip *event = data;
struct wlr_xdg_surface_v6 *surface =
example_xdg_surface_at(sample, sample->cursor->x, sample->cursor->y);
example_set_focused_surface(sample, surface);
wlr_seat_pointer_send_button(sample->wl_seat, (uint32_t)event->time_usec,
BTN_LEFT, event->state);
}
static void handle_input_add(struct compositor_state *state,
struct wlr_input_device *device) {
struct sample_state *sample = state->data;
if (device->type == WLR_INPUT_DEVICE_POINTER ||
device->type == WLR_INPUT_DEVICE_TOUCH ||
device->type == WLR_INPUT_DEVICE_TABLET_TOOL) {
wlr_cursor_attach_input_device(sample->cursor, device);
example_config_configure_cursor(sample->config, sample->cursor,
sample->compositor);
}
if (device->type == WLR_INPUT_DEVICE_KEYBOARD) {
struct xkb_rule_names rules;
memset(&rules, 0, sizeof(rules));
rules.rules = getenv("XKB_DEFAULT_RULES");
rules.model = getenv("XKB_DEFAULT_MODEL");
rules.layout = getenv("XKB_DEFAULT_LAYOUT");
rules.variant = getenv("XKB_DEFAULT_VARIANT");
rules.options = getenv("XKB_DEFAULT_OPTIONS");
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (!context) {
wlr_log(L_ERROR, "Failed to create XKB context");
exit(1);
}
wlr_keyboard_set_keymap(device->keyboard, xkb_map_new_from_names(
context, &rules, XKB_KEYMAP_COMPILE_NO_FLAGS));
xkb_context_unref(context);
wlr_seat_attach_keyboard(sample->wl_seat, device);
}
}
static void handle_output_add(struct output_state *ostate) {
struct sample_state *sample = ostate->compositor->data;
struct wlr_output *wlr_output = ostate->output;
struct wlr_xcursor_image *image = sample->xcursor->images[0];
struct output_config *o_config =
example_config_get_output(sample->config, ostate->output);
if (o_config) {
wlr_output_transform(ostate->output, o_config->transform);
wlr_output_layout_add(sample->layout, ostate->output, o_config->x,
o_config->y);
} else {
wlr_output_layout_add_auto(sample->layout, ostate->output);
}
example_config_configure_cursor(sample->config, sample->cursor,
sample->compositor);
// TODO the cursor must be set depending on which surface it is displayed
// over which should happen in the compositor.
if (!wlr_output_set_cursor(wlr_output, image->buffer,
image->width, image->width, image->height)) {
wlr_log(L_DEBUG, "Failed to set hardware cursor");
return;
}
wlr_cursor_warp(sample->cursor, NULL, sample->cursor->x, sample->cursor->y);
}
static void handle_output_remove(struct output_state *ostate) {
struct sample_state *sample = ostate->compositor->data;
wlr_output_layout_remove(sample->layout, ostate->output);
example_config_configure_cursor(sample->config, sample->cursor,
sample->compositor);
}
int main(int argc, char *argv[]) {
struct sample_state state = { 0 };
struct compositor_state compositor = { 0,
.data = &state,
.output_frame_cb = handle_output_frame,
};
compositor.input_add_cb = handle_input_add;
compositor.output_add_cb = handle_output_add;
compositor.output_remove_cb = handle_output_remove;
state.compositor = &compositor;
state.config = parse_args(argc, argv);
state.cursor = wlr_cursor_create();
state.layout = wlr_output_layout_create();
wlr_cursor_attach_output_layout(state.cursor, state.layout);
wlr_cursor_map_to_region(state.cursor, state.config->cursor.mapped_box);
struct wlr_xcursor_theme *theme = wlr_xcursor_theme_load("default", 16);
if (!theme) {
wlr_log(L_ERROR, "Failed to load cursor theme");
return 1;
}
state.xcursor = wlr_xcursor_theme_get_cursor(theme, "left_ptr");
if (!state.xcursor) {
wlr_log(L_ERROR, "Failed to load left_ptr cursor");
return 1;
}
wlr_cursor_set_xcursor(state.cursor, state.xcursor);
// pointer events
wl_signal_add(&state.cursor->events.motion, &state.cursor_motion);
state.cursor_motion.notify = handle_cursor_motion;
wl_signal_add(&state.cursor->events.motion_absolute,
&state.cursor_motion_absolute);
state.cursor_motion_absolute.notify = handle_cursor_motion_absolute;
wl_signal_add(&state.cursor->events.button, &state.cursor_button);
state.cursor_button.notify = handle_cursor_button;
wl_signal_add(&state.cursor->events.axis, &state.cursor_axis);
state.cursor_axis.notify = handle_cursor_axis;
wl_signal_add(&state.cursor->events.tablet_tool_axis, &state.tool_axis);
state.tool_axis.notify = handle_tool_axis;
wl_signal_add(&state.cursor->events.tablet_tool_tip, &state.tool_tip);
state.tool_tip.notify = handle_tool_tip;
compositor_init(&compositor);
state.renderer = wlr_gles2_renderer_create(compositor.backend);
if (!state.renderer) {
wlr_log(L_ERROR, "Could not start compositor, OOM");
exit(EXIT_FAILURE);
}
wl_display_init_shm(compositor.display);
state.wlr_compositor =
wlr_compositor_create(compositor.display, state.renderer);
state.wl_shell = wlr_wl_shell_create(compositor.display);
state.xdg_shell = wlr_xdg_shell_v6_create(compositor.display);
// shell events
wl_signal_add(&state.xdg_shell->events.new_surface,
&state.new_xdg_surface_v6);
state.new_xdg_surface_v6.notify = handle_new_xdg_surface_v6;
state.data_device_manager =
wlr_data_device_manager_create(compositor.display);
state.gamma_control_manager =
wlr_gamma_control_manager_create(compositor.display);
state.wl_seat = wlr_seat_create(compositor.display, "seat0");
assert(state.wl_seat);
wlr_seat_set_capabilities(state.wl_seat, WL_SEAT_CAPABILITY_KEYBOARD
| WL_SEAT_CAPABILITY_POINTER | WL_SEAT_CAPABILITY_TOUCH);
state.xwayland = wlr_xwayland_create(compositor.display,
state.wlr_compositor);
compositor.keyboard_key_cb = handle_keyboard_key;
if (!wlr_backend_start(compositor.backend)) {
wlr_log(L_ERROR, "Failed to start backend");
wlr_backend_destroy(compositor.backend);
exit(1);
}
wl_display_run(compositor.display);
wl_list_remove(&state.new_xdg_surface_v6.link);
wlr_xwayland_destroy(state.xwayland);
wlr_seat_destroy(state.wl_seat);
wlr_gamma_control_manager_destroy(state.gamma_control_manager);
wlr_data_device_manager_destroy(state.data_device_manager);
wlr_xdg_shell_v6_destroy(state.xdg_shell);
wlr_wl_shell_destroy(state.wl_shell);
wlr_compositor_destroy(state.wlr_compositor);
wlr_renderer_destroy(state.renderer);
compositor_fini(&compositor);
}