clients/simple-touch.c

   1 /*
   2  * Copyright © 2011 Benjamin Franzke
   3  * Copyright © 2011 Intel Corporation
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that copyright
   8  * notice and this permission notice appear in supporting documentation, and
   9  * that the name of the copyright holders not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  The copyright holders make no representations
  12  * about the suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  17  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  18  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  19  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  20  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  21  * OF THIS SOFTWARE.
  22  */
  23
  24 #include <config.h>
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdbool.h>
  30 #include <assert.h>
  31 #include <unistd.h>
  32 #include <sys/mman.h>
  33
  34 #include <wayland-client.h>
  35 #include "../shared/os-compatibility.h"
  36
  37 #define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
  38
  39 struct touch {
  40         struct wl_display *display;
  41         struct wl_registry *registry;
  42         struct wl_compositor *compositor;
  43         struct wl_shell *shell;
  44         struct wl_shm *shm;
  45         struct wl_seat *seat;
  46         struct wl_touch *wl_touch;
  47         struct wl_pointer *pointer;
  48         struct wl_keyboard *keyboard;
  49         struct wl_surface *surface;
  50         struct wl_shell_surface *shell_surface;
  51         struct wl_buffer *buffer;
  52         int has_argb;
  53         int width, height;
  54         void *data;
  55 };
  56
  57 static void
  58 create_shm_buffer(struct touch *touch)
  59 {
  60         struct wl_shm_pool *pool;
  61         int fd, size, stride;
  62
  63         stride = touch->width * 4;
  64         size = stride * touch->height;
  65
  66         fd = os_create_anonymous_file(size);
  67         if (fd < 0) {
  68                 fprintf(stderr, "creating a buffer file for %d B failed: %m\n",
  69                         size);
  70                 exit(1);
  71         }
  72
  73         touch->data =
  74                 mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
  75         if (touch->data == MAP_FAILED) {
  76                 fprintf(stderr, "mmap failed: %m\n");
  77                 close(fd);
  78                 exit(1);
  79         }
  80
  81         pool = wl_shm_create_pool(touch->shm, fd, size);
  82         touch->buffer =
  83                 wl_shm_pool_create_buffer(pool, 0,
  84                                           touch->width, touch->height, stride,
  85                                           WL_SHM_FORMAT_ARGB8888);
  86         wl_shm_pool_destroy(pool);
  87
  88         close(fd);
  89 }
  90
  91 static void
  92 shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
  93 {
  94         struct touch *touch = data;
  95
  96         if (format == WL_SHM_FORMAT_ARGB8888)
  97                 touch->has_argb = 1;
  98 }
  99
 100 struct wl_shm_listener shm_listener = {
 101         shm_format
 102 };
 103
 104
 105 static void
 106 touch_paint(struct touch *touch, int32_t x, int32_t y, int32_t id)
 107 {
 108         uint32_t *p, c;
 109         static const uint32_t colors[] = {
 110                 0xffff0000,
 111                 0xffffff00,
 112                 0xff0000ff,
 113                 0xffff00ff,
 114                 0xff00ff00,
 115                 0xff00ffff,
 116         };
 117
 118         if (id < (int32_t) ARRAY_LENGTH(colors))
 119                 c = colors[id];
 120         else
 121                 c = 0xffffffff;
 122
 123         if (x < 2 || x >= touch->width - 2 ||
 124             y < 2 || y >= touch->height - 2)
 125                 return;
 126
 127         p = (uint32_t *) touch->data + (x - 2) + (y - 2) * touch->width;
 128         p[2] = c;
 129         p += touch->width;
 130         p[1] = c;
 131         p[2] = c;
 132         p[3] = c;
 133         p += touch->width;
 134         p[0] = c;
 135         p[1] = c;
 136         p[2] = c;
 137         p[3] = c;
 138         p[4] = c;
 139         p += touch->width;
 140         p[1] = c;
 141         p[2] = c;
 142         p[3] = c;
 143         p += touch->width;
 144         p[2] = c;
 145
 146         wl_surface_attach(touch->surface, touch->buffer, 0, 0);
 147         wl_surface_damage(touch->surface, x - 2, y - 2, 5, 5);
 148         /* todo: We could queue up more damage before committing, if there
 149          * are more input events to handle.
 150          */
 151         wl_surface_commit(touch->surface);
 152 }
 153
 154 static void
 155 touch_handle_down(void *data, struct wl_touch *wl_touch,
 156                   uint32_t serial, uint32_t time, struct wl_surface *surface,
 157                   int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
 158 {
 159         struct touch *touch = data;
 160         float x = wl_fixed_to_double(x_w);
 161         float y = wl_fixed_to_double(y_w);
 162
 163         touch_paint(touch, x, y, id);
 164 }
 165
 166 static void
 167 touch_handle_up(void *data, struct wl_touch *wl_touch,
 168                 uint32_t serial, uint32_t time, int32_t id)
 169 {
 170 }
 171
 172 static void
 173 touch_handle_motion(void *data, struct wl_touch *wl_touch,
 174                     uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
 175 {
 176         struct touch *touch = data;
 177         float x = wl_fixed_to_double(x_w);
 178         float y = wl_fixed_to_double(y_w);
 179
 180         touch_paint(touch, x, y, id);
 181 }
 182
 183 static void
 184 touch_handle_frame(void *data, struct wl_touch *wl_touch)
 185 {
 186 }
 187
 188 static void
 189 touch_handle_cancel(void *data, struct wl_touch *wl_touch)
 190 {
 191 }
 192
 193 static const struct wl_touch_listener touch_listener = {
 194         touch_handle_down,
 195         touch_handle_up,
 196         touch_handle_motion,
 197         touch_handle_frame,
 198         touch_handle_cancel,
 199 };
 200
 201 static void
 202 seat_handle_capabilities(void *data, struct wl_seat *seat,
 203                          enum wl_seat_capability caps)
 204 {
 205         struct touch *touch = data;
 206
 207         if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !touch->wl_touch) {
 208                 touch->wl_touch = wl_seat_get_touch(seat);
 209                 wl_touch_set_user_data(touch->wl_touch, touch);
 210                 wl_touch_add_listener(touch->wl_touch, &touch_listener, touch);
 211         } else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && touch->wl_touch) {
 212                 wl_touch_destroy(touch->wl_touch);
 213                 touch->wl_touch = NULL;
 214         }
 215 }
 216
 217 static const struct wl_seat_listener seat_listener = {
 218         seat_handle_capabilities,
 219 };
 220
 221 static void
 222 handle_ping(void *data, struct wl_shell_surface *shell_surface,
 223             uint32_t serial)
 224 {
 225         wl_shell_surface_pong(shell_surface, serial);
 226 }
 227
 228 static void
 229 handle_configure(void *data, struct wl_shell_surface *shell_surface,
 230                  uint32_t edges, int32_t width, int32_t height)
 231 {
 232 }
 233
 234 static void
 235 handle_popup_done(void *data, struct wl_shell_surface *shell_surface)
 236 {
 237 }
 238
 239 static const struct wl_shell_surface_listener shell_surface_listener = {
 240         handle_ping,
 241         handle_configure,
 242         handle_popup_done
 243 };
 244
 245 static void
 246 handle_global(void *data, struct wl_registry *registry,
 247               uint32_t name, const char *interface, uint32_t version)
 248 {
 249         struct touch *touch = data;
 250
 251         if (strcmp(interface, "wl_compositor") == 0) {
 252                 touch->compositor =
 253                         wl_registry_bind(registry, name,
 254                                          &wl_compositor_interface, 1);
 255         } else if (strcmp(interface, "wl_shell") == 0) {
 256                 touch->shell =
 257                         wl_registry_bind(registry, name,
 258                                          &wl_shell_interface, 1);
 259         } else if (strcmp(interface, "wl_shm") == 0) {
 260                 touch->shm = wl_registry_bind(registry, name,
 261                                               &wl_shm_interface, 1);
 262                 wl_shm_add_listener(touch->shm, &shm_listener, touch);
 263         } else if (strcmp(interface, "wl_seat") == 0) {
 264                 touch->seat = wl_registry_bind(registry, name,
 265                                                &wl_seat_interface, 1);
 266                 wl_seat_add_listener(touch->seat, &seat_listener, touch);
 267         }
 268 }
 269
 270 static void
 271 handle_global_remove(void *data, struct wl_registry *registry, uint32_t name)
 272 {
 273 }
 274
 275 static const struct wl_registry_listener registry_listener = {
 276         handle_global,
 277         handle_global_remove
 278 };
 279
 280 static struct touch *
 281 touch_create(int width, int height)
 282 {
 283         struct touch *touch;
 284
 285         touch = malloc(sizeof *touch);
 286         if (touch == NULL) {
 287                 fprintf(stderr, "out of memory\n");
 288                 exit(1);
 289         }
 290         touch->display = wl_display_connect(NULL);
 291         assert(touch->display);
 292
 293         touch->has_argb = 0;
 294         touch->registry = wl_display_get_registry(touch->display);
 295         wl_registry_add_listener(touch->registry, &registry_listener, touch);
 296         wl_display_dispatch(touch->display);
 297         wl_display_roundtrip(touch->display);
 298
 299         if (!touch->has_argb) {
 300                 fprintf(stderr, "WL_SHM_FORMAT_ARGB32 not available\n");
 301                 exit(1);
 302         }
 303
 304         wl_display_get_fd(touch->display);
 305
 306         touch->width = width;
 307         touch->height = height;
 308         touch->surface = wl_compositor_create_surface(touch->compositor);
 309         touch->shell_surface = wl_shell_get_shell_surface(touch->shell,
 310                                                           touch->surface);
 311         create_shm_buffer(touch);
 312
 313         if (touch->shell_surface) {
 314                 wl_shell_surface_add_listener(touch->shell_surface,
 315                                               &shell_surface_listener, touch);
 316                 wl_shell_surface_set_toplevel(touch->shell_surface);
 317         }
 318
 319         wl_surface_set_user_data(touch->surface, touch);
 320         wl_shell_surface_set_title(touch->shell_surface, "simple-touch");
 321
 322         memset(touch->data, 64, width * height * 4);
 323         wl_surface_attach(touch->surface, touch->buffer, 0, 0);
 324         wl_surface_damage(touch->surface, 0, 0, width, height);
 325         wl_surface_commit(touch->surface);
 326
 327         return touch;
 328 }
 329
 330 int
 331 main(int argc, char **argv)
 332 {
 333         struct touch *touch;
 334         int ret = 0;
 335
 336         touch = touch_create(600, 500);
 337
 338         while (ret != -1)
 339                 ret = wl_display_dispatch(touch->display);
 340
 341         return 0;
 342 }