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#define _POSIX_C_SOURCE 200112L
#include <wayland-client.h>
#include <wayland-client-protocol.h>
#include "xdg-shell-client-protocol.h"
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/mman.h>
#include <fcntl.h>
struct wl_display* display = NULL;
struct wl_registry* registry = NULL;
struct wl_compositor* compositor = NULL;
struct xdg_wm_base* wm_base = NULL;
struct wl_surface* surface = NULL;
struct xdg_surface* xdg_surface = NULL;
struct xdg_toplevel* xdg_toplevel = NULL;
struct wl_shm* shm = NULL;
struct wl_buffer* buffer = NULL;
void* pixel_data = NULL;
int width = 1024, height = 768;
int running = 1;
static void xdg_wm_base_ping(void *data, struct xdg_wm_base *xdg_wm_base, uint32_t serial)
{
xdg_wm_base_pong(xdg_wm_base, serial);
}
static const struct xdg_wm_base_listener wm_base_listener = {
.ping = xdg_wm_base_ping,
};
static void xdg_surface_configure(void *data, struct xdg_surface *xdg_surface, uint32_t serial)
{
xdg_surface_ack_configure(xdg_surface, serial);
}
static const struct xdg_surface_listener xdg_surface_listener = {
.configure = xdg_surface_configure,
};
static void xdg_toplevel_configure(void *data, struct xdg_toplevel *xdg_toplevel,
int32_t w, int32_t h, struct wl_array *states)
{
if (w > 0 && h > 0) {
width = w;
height = h;
}
}
static void xdg_toplevel_close(void *data, struct xdg_toplevel *xdg_toplevel)
{
running = 0;
}
static const struct xdg_toplevel_listener xdg_toplevel_listener = {
.configure = xdg_toplevel_configure,
.close = xdg_toplevel_close,
};
static void registry_handle_global(void *data, struct wl_registry *reg, uint32_t id,
const char *interface, uint32_t version)
{
if (strcmp(interface, wl_compositor_interface.name) == 0) {
compositor = wl_registry_bind(reg, id, &wl_compositor_interface, 4);
} else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
wm_base = wl_registry_bind(reg, id, &xdg_wm_base_interface, 1);
xdg_wm_base_add_listener(wm_base, &wm_base_listener, NULL);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
shm = wl_registry_bind(reg, id, &wl_shm_interface, 1);
}
}
static void registry_handle_global_remove(void *data, struct wl_registry *reg, uint32_t id)
{
}
static const struct wl_registry_listener registry_listener = {
.global = registry_handle_global,
.global_remove = registry_handle_global_remove,
};
struct wl_buffer* create_buffer(int w, int h, void** data_out) {
int stride = w * 4;
int size = stride * h;
int fd = shm_open("/wl_shm", O_CREAT | O_RDWR, 0600);
if (fd < 0) return NULL;
if (ftruncate(fd, size) < 0) {
close(fd);
return NULL;
}
void* data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED) {
close(fd);
return NULL;
}
struct wl_shm_pool* pool = wl_shm_create_pool(shm, fd, size);
struct wl_buffer* buf = wl_shm_pool_create_buffer(pool, 0, w, h, stride, WL_SHM_FORMAT_ARGB8888);
wl_shm_pool_destroy(pool);
close(fd);
shm_unlink("/wl_shm");
*data_out = data;
return buf;
}
void draw_window() {
uint32_t* pixels = (uint32_t*)pixel_data;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (x > 100 && x < 300 && y > 100 && y < 200)
pixels[y * width + x] = 0xFFFF0000;
else
pixels[y * width + x] = 0xFF202020;
}
}
}
int main(void)
{
display = wl_display_connect(NULL);
if (!display) {
fprintf(stderr, "can't connect\n");
return 1;
}
registry = wl_display_get_registry(display);
wl_registry_add_listener(registry, ®istry_listener, NULL);
wl_display_roundtrip(display);
wl_display_roundtrip(display);
if (!compositor || !wm_base || !shm) {
fprintf(stderr, "missing required interfaces\n");
return 1;
}
surface = wl_compositor_create_surface(compositor);
xdg_surface = xdg_wm_base_get_xdg_surface(wm_base, surface);
xdg_surface_add_listener(xdg_surface, &xdg_surface_listener, NULL);
xdg_toplevel = xdg_surface_get_toplevel(xdg_surface);
xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, NULL);
xdg_toplevel_set_title(xdg_toplevel, "wayland window");
wl_surface_commit(surface);
wl_display_roundtrip(display);
buffer = create_buffer(width, height, &pixel_data);
if (!buffer) {
fprintf(stderr, "failed to create buffer\n");
return 1;
}
draw_window();
wl_surface_attach(surface, buffer, 0, 0);
wl_surface_damage(surface, 0, 0, width, height);
wl_surface_commit(surface);
printf("window open, running...\n");
while (running && wl_display_dispatch(display) != -1) {
}
wl_display_disconnect(display);
return 0;
}
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