#define _POSIX_C_SOURCE 200112L#include <drm_fourcc.h>#include <math.h>#include <stdint.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/types/wlr_output.h>#include <wlr/render/wlr_renderer.h>#include <wlr/types/wlr_input_device.h>#include <wlr/types/wlr_keyboard.h>#include <wlr/types/wlr_matrix.h>#include <wlr/types/wlr_touch.h>#include <wlr/util/log.h>#include <xkbcommon/xkbcommon.h>#include "cat.h"struct sample_state {struct wl_display *display;struct wlr_renderer *renderer;struct wlr_texture *cat_texture;struct wl_list touch_points;struct timespec last_frame;struct wl_listener new_output;struct wl_listener new_input;struct wl_list touch;};struct touch_point {int32_t touch_id;double x, y;struct wl_list link;};struct touch_state {struct sample_state *sample;struct wlr_input_device *device;struct wl_listener destroy;struct wl_listener down;struct wl_listener up;struct wl_listener motion;struct wl_list link;void *data;};struct sample_output {struct sample_state *sample;struct wlr_output *output;struct wl_listener frame;struct wl_listener destroy;};struct sample_keyboard {struct sample_state *sample;struct wlr_input_device *device;struct wl_listener key;struct wl_listener destroy;};static void output_frame_notify(struct wl_listener *listener, void *data) {struct sample_output *sample_output = wl_container_of(listener, sample_output, frame);struct sample_state *sample = sample_output->sample;struct timespec now;clock_gettime(CLOCK_MONOTONIC, &now);struct wlr_output *wlr_output = sample_output->output;int32_t width, height;wlr_output_effective_resolution(wlr_output, &width, &height);wlr_output_attach_render(wlr_output, NULL);wlr_renderer_begin(sample->renderer, wlr_output->width, wlr_output->height);wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});struct touch_point *p;wl_list_for_each(p, &sample->touch_points, link) {int x = (int)(p->x * width) - sample->cat_texture->width / 2;int y = (int)(p->y * height) - sample->cat_texture->height / 2;wlr_render_texture(sample->renderer, sample->cat_texture,wlr_output->transform_matrix, x, y, 1.0f);}wlr_renderer_end(sample->renderer);wlr_output_commit(wlr_output);sample->last_frame = now;}static void touch_down_notify(struct wl_listener *listener, void *data) {struct wlr_event_touch_motion *event = data;struct touch_state *tstate = wl_container_of(listener, tstate, down);struct sample_state *sample = tstate->sample;struct touch_point *point = calloc(1, sizeof(struct touch_point));point->touch_id = event->touch_id;point->x = event->x;point->y = event->y;wl_list_insert(&sample->touch_points, &point->link);}static void touch_up_notify(struct wl_listener *listener, void *data ) {struct wlr_event_touch_up *event = data;struct touch_state *tstate = wl_container_of(listener, tstate, up);struct sample_state *sample = tstate->sample;struct touch_point *point, *tmp;wl_list_for_each_safe(point, tmp, &sample->touch_points, link) {if (point->touch_id == event->touch_id) {wl_list_remove(&point->link);break;}}}static void touch_motion_notify(struct wl_listener *listener, void *data) {struct wlr_event_touch_motion *event = data;struct touch_state *tstate = wl_container_of(listener, tstate, motion);struct sample_state *sample = tstate->sample;struct touch_point *point;wl_list_for_each(point, &sample->touch_points, link) {if (point->touch_id == event->touch_id) {point->x = event->x;point->y = event->y;break;}}}static void touch_destroy_notify(struct wl_listener *listener, void *data) {struct touch_state *tstate = wl_container_of(listener, tstate, destroy);wl_list_remove(&tstate->link);wl_list_remove(&tstate->destroy.link);wl_list_remove(&tstate->down.link);wl_list_remove(&tstate->up.link);wl_list_remove(&tstate->motion.link);free(tstate);}static void output_remove_notify(struct wl_listener *listener, void *data) {struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);wl_list_remove(&sample_output->frame.link);wl_list_remove(&sample_output->destroy.link);free(sample_output);}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;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_TOUCH:;struct touch_state *tstate = calloc(sizeof(struct touch_state), 1);tstate->device = device;tstate->sample = sample;tstate->destroy.notify = touch_destroy_notify;wl_signal_add(&device->events.destroy, &tstate->destroy);tstate->down.notify = touch_down_notify;wl_signal_add(&device->touch->events.down, &tstate->down);tstate->motion.notify = touch_motion_notify;wl_signal_add(&device->touch->events.motion, &tstate->motion);tstate->up.notify = touch_up_notify;wl_signal_add(&device->touch->events.up, &tstate->up);wl_list_insert(&sample->touch, &tstate->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 = {.display = display};wl_list_init(&state.touch_points);wl_list_init(&state.touch);struct wlr_backend *wlr = wlr_backend_autocreate(display);if (!wlr) {exit(1);}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);state.renderer = wlr_backend_get_renderer(wlr);if (!state.renderer) {wlr_log(WLR_ERROR, "Could not start compositor, OOM");exit(EXIT_FAILURE);}state.cat_texture = wlr_texture_from_pixels(state.renderer,DRM_FORMAT_ARGB8888, cat_tex.width * 4, cat_tex.width, cat_tex.height,cat_tex.pixel_data);if (!state.cat_texture) {wlr_log(WLR_ERROR, "Could not start compositor, OOM");exit(EXIT_FAILURE);}if (!wlr_backend_start(wlr)) {wlr_log(WLR_ERROR, "Failed to start backend");wlr_backend_destroy(wlr);exit(1);}wl_display_run(display);wlr_texture_destroy(state.cat_texture);wl_display_destroy(display);}
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