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#define _XOPEN_SOURCE 600
#include <getopt.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <wayland-server-core.h>
#include <wlr/backend.h>
#include <wlr/render/allocator.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
#include <xkbcommon/xkbcommon.h>
struct sample_state {
struct wl_display *display;
struct wl_listener new_output;
struct wl_listener new_input;
struct timespec last_frame;
struct wlr_renderer *renderer;
struct wlr_allocator *allocator;
struct wl_list outputs;
};
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 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 wlr_output *wlr_output = sample_output->output;
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
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});
static float rotation = 0.f;
for (int y = -128; y < height; y += 128) {
for (int x = -128; x < width; x += 128) {
struct wlr_box box = {
.x = x,
.y = y,
.width = 128,
.height = 128,
};
float color[] = {
255.f / x,
255.f / y,
255.f / (x + y),
1.f
};
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL,
rotation, wlr_output->transform_matrix);
wlr_render_quad_with_matrix(sample->renderer, color, matrix);
}
}
wlr_renderer_end(sample->renderer);
wlr_output_commit(wlr_output);
//TODO rotate with a delta time
rotation += 0.05;
if (rotation > 2 * M_PI) {
rotation = 0.f;
}
sample->last_frame = now;
}
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);
wlr_output_init_render(output, sample->allocator, sample->renderer);
struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
struct wlr_output_mode *mode = wlr_output_preferred_mode(output);
if (mode != NULL) {
wlr_output_set_mode(output, mode);
}
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;
wl_list_insert(&sample->outputs, &sample_output->link);
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_keyboard_key_event *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_map_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;
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.outputs);
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_renderer_autocreate(wlr);
if (!state.renderer) {
wlr_log(WLR_ERROR, "Could not start compositor, OOM");
wlr_backend_destroy(wlr);
exit(EXIT_FAILURE);
}
state.allocator = wlr_allocator_autocreate(wlr, state.renderer);
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);
}
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