Init

build.sh

@@ -0,0 +1 @@
+gcc compositor.c common/shm.c protocols/xdg-shell-protocol.c -o compositor -lwayland-client -lrt -g

client.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <wayland/wayland-client.h>
+
+int
+main(int argc, char *argv[])
+{
+    struct wl_display *display = wl_display_connect(NULL);
+    if (!display) {
+        fprintf(stderr, "Failed to connect to Wayland display.\n");
+        return 1;
+    }
+    fprintf(stderr, "Connection established!\n");
+
+    wl_display_disconnect(display);
+    return 0;
+}

common/shm.c

@@ -0,0 +1,52 @@
+#define _POSIX_C_SOURCE 200112L
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <time.h>
+#include <unistd.h>
+
+static void
+randname(char *buf)
+{
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+	long r = ts.tv_nsec;
+	for (int i = 0; i < 6; ++i) {
+		buf[i] = 'A'+(r&15)+(r&16)*2;
+		r >>= 5;
+	}
+}
+
+static int
+create_shm_file(void)
+{
+	int retries = 100;
+	do {
+		char name[] = "/wl_shm-XXXXXX";
+		randname(name + sizeof(name) - 7);
+		--retries;
+		int fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
+		if (fd >= 0) {
+			shm_unlink(name);
+			return fd;
+		}
+	} while (retries > 0 && errno == EEXIST);
+	return -1;
+}
+
+int
+allocate_shm_file(size_t size)
+{
+	int fd = create_shm_file();
+	if (fd < 0)
+		return -1;
+	int ret;
+	do {
+		ret = ftruncate(fd, size);
+	} while (ret < 0 && errno == EINTR);
+	if (ret < 0) {
+		close(fd);
+		return -1;
+	}
+	return fd;
+}

common/shm.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <unistd.h>
+
+int allocate_shm_file(size_t size);

compositor.c

@@ -0,0 +1,180 @@
+#include "common/shm.h"
+#include "protocols/xdg-shell-client-protocol.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <wayland/wayland-client.h>
+
+struct client_state
+{
+    /* Globals */
+    struct wl_display *wl_display;
+    struct wl_registry *wl_registry;
+    struct wl_shm *wl_shm;
+    struct wl_compositor *wl_compositor;
+    struct xdg_wm_base *xdg_wm_base;
+
+    /* Objects */
+    struct wl_surface *wl_surface;
+    struct xdg_surface *xdg_surface;
+    struct xdg_toplevel *xdg_toplevel;
+};
+
+static struct wl_buffer *draw_frame(struct client_state *state);
+
+static void registry_handle_global(void *data, struct wl_registry *registry, uint32_t name, const char *interface,
+                                   uint32_t version)
+{
+    struct client_state *state = data;
+
+    printf("interface: '%s', version: %d, name: %d\n", interface, version, name);
+
+    if (strcmp(interface, wl_compositor_interface.name) == 0) {
+        state->wl_compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 5);
+        printf("Bound to compositor!\n");
+    }
+
+    if (strcmp(interface, wl_shm_interface.name) == 0) {
+        state->wl_shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
+        printf("Bound to shm!\n");
+    }
+
+    if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
+        state->xdg_wm_base = wl_registry_bind(registry, name, &xdg_wm_base_interface, 4);
+        printf("Bound to wm_base!\n");
+    }
+}
+
+static void registry_handle_global_remove(void *data, struct wl_registry *registry, uint32_t name)
+{
+    // This space deliberately left blank
+}
+
+static void shm_handle_format(void *data, struct wl_shm *wl_shm, uint32_t format)
+{
+    struct client_state *state = data;
+
+    printf("shm_handle_format: supported format is [%d]\n", format);
+}
+
+static void wm_base_handle_ping(void *data, struct xdg_wm_base *xdg_wm_base, uint32_t serial)
+{
+    struct client_state *state = data;
+
+    // TODO !
+}
+
+static void surface_handle_configure(void *data, struct xdg_surface *xdg_surface, uint32_t serial)
+{
+    struct client_state *state = data;
+
+    xdg_surface_ack_configure(xdg_surface, serial);
+
+    struct wl_buffer *buffer = draw_frame(state);
+    wl_surface_attach(state->wl_surface, buffer, 0, 0);
+    wl_surface_commit(state->wl_surface);
+}
+
+static const struct wl_registry_listener wl_registry_listener = {
+    .global = registry_handle_global,
+    .global_remove = registry_handle_global_remove,
+};
+
+static const struct wl_shm_listener wl_shm_listener = {
+    .format = shm_handle_format,
+};
+
+static const struct xdg_wm_base_listener xdg_wm_base_listener = {
+    .ping = wm_base_handle_ping,
+};
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+    .configure = surface_handle_configure,
+};
+
+static void wl_buffer_release(void *data, struct wl_buffer *wl_buffer)
+{
+    /* Sent by the compositor when it's no longer using this buffer */
+    wl_buffer_destroy(wl_buffer);
+}
+
+static const struct wl_buffer_listener wl_buffer_listener = {
+    .release = wl_buffer_release,
+};
+
+static struct wl_buffer *draw_frame(struct client_state *state)
+{
+    const int width = 640, height = 480;
+    int stride = width * 4;
+    int size = stride * height;
+    int offset = 0;
+
+    int fd = allocate_shm_file(size);
+    if (fd == -1) {
+        return NULL;
+    }
+
+    uint32_t *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(state->wl_shm, fd, size);
+    struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride, WL_SHM_FORMAT_XRGB8888);
+    wl_shm_pool_destroy(pool);
+    close(fd);
+
+    // Solid white
+    // uint32_t *pixels = (uint32_t *)&data[offset];
+    // memset(pixels, 255, width * height * 4);
+
+    // Checkerboard pattern
+    uint32_t *pixels = (uint32_t *)&data[offset];
+    for (int y = 0; y < height; ++y) {
+        for (int x = 0; x < width; ++x) {
+            if ((x + y / 8 * 8) % 16 < 8) {
+                pixels[y * width + x] = 0xFF666666;
+            } else {
+                pixels[y * width + x] = 0xFFEEEEEE;
+            }
+        }
+    }
+
+    munmap(data, size);
+    wl_buffer_add_listener(buffer, &wl_buffer_listener, NULL);
+    return buffer;
+}
+
+int main(int argc, char *argv[])
+{
+    struct client_state state = {0};
+
+    state.wl_display = wl_display_connect(NULL);
+
+    state.wl_registry = wl_display_get_registry(state.wl_display);
+
+    wl_registry_add_listener(state.wl_registry, &wl_registry_listener, &state);
+
+    wl_display_roundtrip(state.wl_display);
+
+    state.wl_surface = wl_compositor_create_surface(state.wl_compositor);
+
+    wl_shm_add_listener(state.wl_shm, &wl_shm_listener, &state);
+
+    state.xdg_surface = xdg_wm_base_get_xdg_surface(state.xdg_wm_base, state.wl_surface);
+    xdg_surface_add_listener(state.xdg_surface, &xdg_surface_listener, &state);
+
+    state.xdg_toplevel = xdg_surface_get_toplevel(state.xdg_surface);
+
+    xdg_toplevel_set_title(state.xdg_toplevel, "Example client");
+    wl_surface_commit(state.wl_surface);
+
+    while (wl_display_dispatch(state.wl_display)) {
+        /* This space deliberately left blank */
+    }
+
+    return 0;
+}

globals.c

@@ -0,0 +1,34 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <wayland/wayland-client.h>
+
+static void
+registry_handle_global(void *data, struct wl_registry *registry,
+		uint32_t name, const char *interface, uint32_t version)
+{
+	printf("interface: '%s', version: %d, name: %d\n",
+			interface, version, name);
+}
+
+static void
+registry_handle_global_remove(void *data, struct wl_registry *registry,
+		uint32_t name)
+{
+	// This space deliberately left blank
+}
+
+static const struct wl_registry_listener
+registry_listener = {
+	.global = registry_handle_global,
+	.global_remove = registry_handle_global_remove,
+};
+
+int
+main(int argc, char *argv[])
+{
+	struct wl_display *display = wl_display_connect(NULL);
+	struct wl_registry *registry = wl_display_get_registry(display);
+	wl_registry_add_listener(registry, &registry_listener, NULL);
+	wl_display_roundtrip(display);
+	return 0;
+}

protocols/xdg-shell-protocol.c

@@ -0,0 +1,183 @@
+/* Generated by wayland-scanner 1.21.0 */
+
+/*
+ * Copyright © 2008-2013 Kristian Høgsberg
+ * Copyright © 2013      Rafael Antognolli
+ * Copyright © 2013      Jasper St. Pierre
+ * Copyright © 2010-2013 Intel Corporation
+ * Copyright © 2015-2017 Samsung Electronics Co., Ltd
+ * Copyright © 2015-2017 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <wayland/wayland-util.h>
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_output_interface;
+extern const struct wl_interface wl_seat_interface;
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface xdg_popup_interface;
+extern const struct wl_interface xdg_positioner_interface;
+extern const struct wl_interface xdg_surface_interface;
+extern const struct wl_interface xdg_toplevel_interface;
+
+static const struct wl_interface *xdg_shell_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&xdg_positioner_interface,
+	&xdg_surface_interface,
+	&wl_surface_interface,
+	&xdg_toplevel_interface,
+	&xdg_popup_interface,
+	&xdg_surface_interface,
+	&xdg_positioner_interface,
+	&xdg_toplevel_interface,
+	&wl_seat_interface,
+	NULL,
+	NULL,
+	NULL,
+	&wl_seat_interface,
+	NULL,
+	&wl_seat_interface,
+	NULL,
+	NULL,
+	&wl_output_interface,
+	&wl_seat_interface,
+	NULL,
+	&xdg_positioner_interface,
+	NULL,
+};
+
+static const struct wl_message xdg_wm_base_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "create_positioner", "n", xdg_shell_types + 4 },
+	{ "get_xdg_surface", "no", xdg_shell_types + 5 },
+	{ "pong", "u", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_wm_base_events[] = {
+	{ "ping", "u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_wm_base_interface = {
+	"xdg_wm_base", 5,
+	4, xdg_wm_base_requests,
+	1, xdg_wm_base_events,
+};
+
+static const struct wl_message xdg_positioner_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "set_size", "ii", xdg_shell_types + 0 },
+	{ "set_anchor_rect", "iiii", xdg_shell_types + 0 },
+	{ "set_anchor", "u", xdg_shell_types + 0 },
+	{ "set_gravity", "u", xdg_shell_types + 0 },
+	{ "set_constraint_adjustment", "u", xdg_shell_types + 0 },
+	{ "set_offset", "ii", xdg_shell_types + 0 },
+	{ "set_reactive", "3", xdg_shell_types + 0 },
+	{ "set_parent_size", "3ii", xdg_shell_types + 0 },
+	{ "set_parent_configure", "3u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_positioner_interface = {
+	"xdg_positioner", 5,
+	10, xdg_positioner_requests,
+	0, NULL,
+};
+
+static const struct wl_message xdg_surface_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "get_toplevel", "n", xdg_shell_types + 7 },
+	{ "get_popup", "n?oo", xdg_shell_types + 8 },
+	{ "set_window_geometry", "iiii", xdg_shell_types + 0 },
+	{ "ack_configure", "u", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_surface_events[] = {
+	{ "configure", "u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_surface_interface = {
+	"xdg_surface", 5,
+	5, xdg_surface_requests,
+	1, xdg_surface_events,
+};
+
+static const struct wl_message xdg_toplevel_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "set_parent", "?o", xdg_shell_types + 11 },
+	{ "set_title", "s", xdg_shell_types + 0 },
+	{ "set_app_id", "s", xdg_shell_types + 0 },
+	{ "show_window_menu", "ouii", xdg_shell_types + 12 },
+	{ "move", "ou", xdg_shell_types + 16 },
+	{ "resize", "ouu", xdg_shell_types + 18 },
+	{ "set_max_size", "ii", xdg_shell_types + 0 },
+	{ "set_min_size", "ii", xdg_shell_types + 0 },
+	{ "set_maximized", "", xdg_shell_types + 0 },
+	{ "unset_maximized", "", xdg_shell_types + 0 },
+	{ "set_fullscreen", "?o", xdg_shell_types + 21 },
+	{ "unset_fullscreen", "", xdg_shell_types + 0 },
+	{ "set_minimized", "", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_toplevel_events[] = {
+	{ "configure", "iia", xdg_shell_types + 0 },
+	{ "close", "", xdg_shell_types + 0 },
+	{ "configure_bounds", "4ii", xdg_shell_types + 0 },
+	{ "wm_capabilities", "5a", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_toplevel_interface = {
+	"xdg_toplevel", 5,
+	14, xdg_toplevel_requests,
+	4, xdg_toplevel_events,
+};
+
+static const struct wl_message xdg_popup_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "grab", "ou", xdg_shell_types + 22 },
+	{ "reposition", "3ou", xdg_shell_types + 24 },
+};
+
+static const struct wl_message xdg_popup_events[] = {
+	{ "configure", "iiii", xdg_shell_types + 0 },
+	{ "popup_done", "", xdg_shell_types + 0 },
+	{ "repositioned", "3u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_popup_interface = {
+	"xdg_popup", 5,
+	3, xdg_popup_requests,
+	3, xdg_popup_events,
+};
+

server.c

@@ -0,0 +1,86 @@
+#include <stdio.h>
+#include <wayland/wayland-server.h>
+#include <wayland/wayland-util.h>
+#include <stdlib.h>
+
+typedef struct my_state_t {
+    int x;
+    struct wl_list client_outputs;
+} my_state;
+
+typedef struct my_output_t {
+    my_state *state;
+    struct wl_resource *resource;
+} my_output;
+
+static void
+wl_output_handle_resource_destroy(struct wl_resource *resource)
+{
+    my_output *client_output = wl_resource_get_user_data(resource);
+
+    // TODO: Clean up resource
+
+    // remove_to_list(client_output->state->client_outputs, client_output);
+}
+
+static void
+wl_output_handle_release(struct wl_client *client, struct wl_resource *resource)
+{
+    wl_resource_destroy(resource);
+}
+
+static const struct wl_output_interface
+wl_output_implementation = {
+    .release = wl_output_handle_release,
+};
+
+static void wl_output_handle_bind(struct wl_client *client, void *data, uint32_t version, uint32_t id)
+{
+    my_state *state = data;
+    printf("wl_output_handle_bind: State Variable: %d", state->x);
+
+    my_output *client_output = malloc(sizeof *client_output);
+
+    struct wl_resource *resource = wl_resource_create(
+        client, &wl_output_implementation, wl_output_interface.version, id);
+
+    wl_resource_set_implementation(resource, &wl_output_implementation,
+        client_output, wl_output_handle_resource_destroy);
+
+    client_output->resource = resource;
+    client_output->state = state;
+
+    // Send geometry event, et al
+    wl_output_send_geometry(resource, 0, 0, 1920, 1080,
+        WL_OUTPUT_SUBPIXEL_UNKNOWN, "Foobar, Inc",
+        "Fancy Monitor 9001 4K HD 120 FPS Noscope",
+        WL_OUTPUT_TRANSFORM_NORMAL);
+
+    // add_to_list(state->client_outputs, client_output);
+}
+
+int main(int argc, char *argv[])
+{
+    struct wl_display *display = wl_display_create();
+    if (!display) {
+        fprintf(stderr, "Unable to create Wayland display.\n");
+        return 1;
+    }
+
+    const char *socket = wl_display_add_socket_auto(display);
+    if (!socket) {
+        fprintf(stderr, "Unable to add socket to Wayland display.\n");
+        return 1;
+    }
+
+    fprintf(stderr, "Running Wayland display on %s\n", socket);
+
+    my_state state = { 0 };
+
+    wl_global_create(display, &wl_output_interface, 1, &state, wl_output_handle_bind);
+
+    wl_display_run(display);
+
+    wl_display_destroy(display);
+    return 0;
+}