#define _POSIX_C_SOURCE 200112L#include <assert.h>#include <math.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <time.h>#include <unistd.h>#include <wayland-server-core.h>#include <wlr/backend.h>#include <wlr/backend/session.h>#include <wlr/render/wlr_renderer.h>#include <wlr/types/wlr_cursor.h>#include <wlr/types/wlr_keyboard.h>#include <wlr/types/wlr_matrix.h>#include <wlr/types/wlr_output_layout.h>#include <wlr/types/wlr_pointer.h>#include <wlr/util/log.h>#include <wlr/xcursor.h>#include <xkbcommon/xkbcommon.h>struct sample_state {struct wl_display *display;struct wlr_xcursor *xcursor;float default_color[4];float clear_color[4];struct wlr_output_layout *layout;struct wl_list cursors; // sample_cursor::linkstruct wl_list pointers; // sample_pointer::linkstruct wl_list outputs; // sample_output::linkstruct timespec last_frame;struct wl_listener new_output;struct wl_listener new_input;};struct sample_cursor {struct sample_state *sample;struct wlr_input_device *device;struct wlr_cursor *cursor;struct wl_list link;struct wl_listener cursor_motion;struct wl_listener cursor_motion_absolute;struct wl_listener cursor_button;struct wl_listener cursor_axis;struct wl_listener destroy;};struct sample_pointer {struct wlr_input_device *device;struct wl_list link;};struct sample_output {struct sample_state *sample;struct wlr_output *output;struct wl_listener frame;struct wl_listener destroy;struct wl_list link;};struct sample_keyboard {struct sample_state *sample;struct wlr_input_device *device;struct wl_listener key;struct wl_listener destroy;};static void configure_cursor(struct wlr_cursor *cursor, struct wlr_input_device *device,struct sample_state *sample) {struct sample_output *output;wlr_log(WLR_INFO, "Configuring cursor %p for device %p", cursor, device);// reset mappingswlr_cursor_map_to_output(cursor, NULL);wlr_cursor_detach_input_device(cursor, device);wlr_cursor_map_input_to_output(cursor, device, NULL);wlr_cursor_attach_input_device(cursor, device);// configure device to output mappingswl_list_for_each(output, &sample->outputs, link) {wlr_cursor_map_to_output(cursor, output->output);wlr_cursor_map_input_to_output(cursor, device, output->output);}}static void output_frame_notify(struct wl_listener *listener, void *data) {struct sample_output *output = wl_container_of(listener, output, frame);struct sample_state *sample = output->sample;struct wlr_output *wlr_output = output->output;struct wlr_renderer *renderer = wlr_backend_get_renderer(wlr_output->backend);wlr_output_attach_render(wlr_output, NULL);wlr_renderer_begin(renderer, wlr_output->width, wlr_output->height);wlr_renderer_clear(renderer, sample->clear_color);wlr_output_render_software_cursors(wlr_output, NULL);wlr_renderer_end(renderer);wlr_output_commit(wlr_output);}static void handle_cursor_motion(struct wl_listener *listener, void *data) {struct sample_cursor *cursor =wl_container_of(listener, cursor, cursor_motion);struct wlr_event_pointer_motion *event = data;wlr_cursor_move(cursor->cursor, event->device, event->delta_x,event->delta_y);}static void handle_cursor_motion_absolute(struct wl_listener *listener,void *data) {struct sample_cursor *cursor =wl_container_of(listener, cursor, cursor_motion_absolute);struct wlr_event_pointer_motion_absolute *event = data;wlr_cursor_warp_absolute(cursor->cursor, event->device, event->x, event->y);}static void cursor_destroy(struct sample_cursor *cursor) {wl_list_remove(&cursor->link);wl_list_remove(&cursor->cursor_motion.link);wl_list_remove(&cursor->cursor_motion_absolute.link);wlr_cursor_destroy(cursor->cursor);free(cursor);}static void output_remove_notify(struct wl_listener *listener, void *data) {struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);struct sample_state *sample = sample_output->sample;wl_list_remove(&sample_output->frame.link);wl_list_remove(&sample_output->destroy.link);wl_list_remove(&sample_output->link);free(sample_output);struct sample_cursor *cursor;wl_list_for_each(cursor, &sample->cursors, link) {configure_cursor(cursor->cursor, cursor->device, sample);}}static void new_output_notify(struct wl_listener *listener, void *data) {struct wlr_output *output = data;struct sample_state *sample = wl_container_of(listener, sample, new_output);struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));sample_output->output = output;sample_output->sample = sample;wl_signal_add(&output->events.frame, &sample_output->frame);sample_output->frame.notify = output_frame_notify;wl_signal_add(&output->events.destroy, &sample_output->destroy);sample_output->destroy.notify = output_remove_notify;wlr_output_layout_add_auto(sample->layout, output);struct sample_cursor *cursor;wl_list_for_each(cursor, &sample->cursors, link) {configure_cursor(cursor->cursor, cursor->device, sample);struct wlr_xcursor_image *image = sample->xcursor->images[0];wlr_cursor_set_image(cursor->cursor, image->buffer, image->width * 4,image->width, image->height, image->hotspot_x, image->hotspot_y, 0);wlr_cursor_warp(cursor->cursor, NULL, cursor->cursor->x,cursor->cursor->y);}wl_list_insert(&sample->outputs, &sample_output->link);struct wlr_output_mode *mode = wlr_output_preferred_mode(output);if (mode != NULL) {wlr_output_set_mode(output, mode);}wlr_output_commit(output);}static void keyboard_key_notify(struct wl_listener *listener, void *data) {struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);struct sample_state *sample = keyboard->sample;struct wlr_event_keyboard_key *event = data;uint32_t keycode = event->keycode + 8;const xkb_keysym_t *syms;int nsyms = xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state,keycode, &syms);for (int i = 0; i < nsyms; i++) {xkb_keysym_t sym = syms[i];if (sym == XKB_KEY_Escape) {wl_display_terminate(sample->display);}}}static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);wl_list_remove(&keyboard->destroy.link);wl_list_remove(&keyboard->key.link);free(keyboard);}static void new_input_notify(struct wl_listener *listener, void *data) {struct wlr_input_device *device = data;struct sample_state *sample = wl_container_of(listener, sample, new_input);switch (device->type) {case WLR_INPUT_DEVICE_KEYBOARD:;struct sample_keyboard *keyboard = calloc(1, sizeof(struct sample_keyboard));keyboard->device = device;keyboard->sample = sample;wl_signal_add(&device->events.destroy, &keyboard->destroy);keyboard->destroy.notify = keyboard_destroy_notify;wl_signal_add(&device->keyboard->events.key, &keyboard->key);keyboard->key.notify = keyboard_key_notify;struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);if (!context) {wlr_log(WLR_ERROR, "Failed to create XKB context");exit(1);}struct xkb_keymap *keymap = xkb_keymap_new_from_names(context, NULL,XKB_KEYMAP_COMPILE_NO_FLAGS);if (!keymap) {wlr_log(WLR_ERROR, "Failed to create XKB keymap");exit(1);}wlr_keyboard_set_keymap(device->keyboard, keymap);xkb_keymap_unref(keymap);xkb_context_unref(context);break;case WLR_INPUT_DEVICE_POINTER:;struct sample_cursor *cursor = calloc(1, sizeof(struct sample_cursor));struct sample_pointer *pointer = calloc(1, sizeof(struct sample_pointer));pointer->device = device;cursor->sample = sample;cursor->device = device;cursor->cursor = wlr_cursor_create();wlr_cursor_attach_output_layout(cursor->cursor, sample->layout);wl_signal_add(&cursor->cursor->events.motion, &cursor->cursor_motion);cursor->cursor_motion.notify = handle_cursor_motion;wl_signal_add(&cursor->cursor->events.motion_absolute,&cursor->cursor_motion_absolute);cursor->cursor_motion_absolute.notify = handle_cursor_motion_absolute;wlr_cursor_attach_input_device(cursor->cursor, device);configure_cursor(cursor->cursor, device, sample);struct wlr_xcursor_image *image = sample->xcursor->images[0];wlr_cursor_set_image(cursor->cursor, image->buffer, image->width * 4,image->width, image->height, image->hotspot_x, image->hotspot_y, 0);wl_list_insert(&sample->cursors, &cursor->link);wl_list_insert(&sample->pointers, &pointer->link);break;default:break;}}int main(int argc, char *argv[]) {wlr_log_init(WLR_DEBUG, NULL);struct wl_display *display = wl_display_create();struct sample_state state = {.default_color = { 0.25f, 0.25f, 0.25f, 1 },.clear_color = { 0.25f, 0.25f, 0.25f, 1 },.display = display,};struct wlr_backend *wlr = wlr_backend_autocreate(display);if (!wlr) {exit(1);}wl_list_init(&state.cursors);wl_list_init(&state.pointers);wl_list_init(&state.outputs);state.layout = wlr_output_layout_create();wl_signal_add(&wlr->events.new_output, &state.new_output);state.new_output.notify = new_output_notify;wl_signal_add(&wlr->events.new_input, &state.new_input);state.new_input.notify = new_input_notify;clock_gettime(CLOCK_MONOTONIC, &state.last_frame);struct wlr_xcursor_theme *theme = wlr_xcursor_theme_load("default", 16);if (!theme) {wlr_log(WLR_ERROR, "Failed to load cursor theme");return 1;}state.xcursor = wlr_xcursor_theme_get_cursor(theme, "left_ptr");if (!state.xcursor) {wlr_log(WLR_ERROR, "Failed to load left_ptr cursor");return 1;}if (!wlr_backend_start(wlr)) {wlr_log(WLR_ERROR, "Failed to start backend");wlr_backend_destroy(wlr);exit(1);}wl_display_run(display);wl_display_destroy(display);struct sample_cursor *cursor, *tmp_cursor;wl_list_for_each_safe(cursor, tmp_cursor, &state.cursors, link) {cursor_destroy(cursor);}struct sample_pointer *pointer, *tmp_pointer;wl_list_for_each_safe(pointer, tmp_pointer, &state.pointers, link) {free(pointer);}wlr_xcursor_theme_destroy(theme);wlr_output_layout_destroy(state.layout);}
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