ui/dbus-listener.c

   1 /*
   2  * QEMU DBus display console
   3  *
   4  * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu/osdep.h"
  25 #include "qemu/error-report.h"
  26 #include "sysemu/sysemu.h"
  27 #include "dbus.h"
  28 #include <gio/gunixfdlist.h>
  29
  30 #ifdef CONFIG_OPENGL
  31 #include "ui/shader.h"
  32 #include "ui/egl-helpers.h"
  33 #include "ui/egl-context.h"
  34 #endif
  35 #include "trace.h"
  36
  37 struct _DBusDisplayListener {
  38     GObject parent;
  39
  40     char *bus_name;
  41     DBusDisplayConsole *console;
  42     GDBusConnection *conn;
  43
  44     QemuDBusDisplay1Listener *proxy;
  45
  46     DisplayChangeListener dcl;
  47     DisplaySurface *ds;
  48     int gl_updates;
  49 };
  50
  51 G_DEFINE_TYPE(DBusDisplayListener, dbus_display_listener, G_TYPE_OBJECT)
  52
  53 #ifdef CONFIG_GBM
  54 static void dbus_update_gl_cb(GObject *source_object,
  55                            GAsyncResult *res,
  56                            gpointer user_data)
  57 {
  58     g_autoptr(GError) err = NULL;
  59     DBusDisplayListener *ddl = user_data;
  60
  61     if (!qemu_dbus_display1_listener_call_update_dmabuf_finish(ddl->proxy,
  62                                                                res, &err)) {
  63         error_report("Failed to call update: %s", err->message);
  64     }
  65
  66     graphic_hw_gl_block(ddl->dcl.con, false);
  67     g_object_unref(ddl);
  68 }
  69
  70 static void dbus_call_update_gl(DBusDisplayListener *ddl,
  71                                 int x, int y, int w, int h)
  72 {
  73     graphic_hw_gl_block(ddl->dcl.con, true);
  74     glFlush();
  75     qemu_dbus_display1_listener_call_update_dmabuf(ddl->proxy,
  76         x, y, w, h,
  77         G_DBUS_CALL_FLAGS_NONE,
  78         DBUS_DEFAULT_TIMEOUT, NULL,
  79         dbus_update_gl_cb,
  80         g_object_ref(ddl));
  81 }
  82
  83 static void dbus_scanout_disable(DisplayChangeListener *dcl)
  84 {
  85     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
  86
  87     ddl->ds = NULL;
  88     qemu_dbus_display1_listener_call_disable(
  89         ddl->proxy, G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
  90 }
  91
  92 static void dbus_scanout_dmabuf(DisplayChangeListener *dcl,
  93                                 QemuDmaBuf *dmabuf)
  94 {
  95     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
  96     g_autoptr(GError) err = NULL;
  97     g_autoptr(GUnixFDList) fd_list = NULL;
  98
  99     fd_list = g_unix_fd_list_new();
 100     if (g_unix_fd_list_append(fd_list, dmabuf->fd, &err) != 0) {
 101         error_report("Failed to setup dmabuf fdlist: %s", err->message);
 102         return;
 103     }
 104
 105     qemu_dbus_display1_listener_call_scanout_dmabuf(
 106         ddl->proxy,
 107         g_variant_new_handle(0),
 108         dmabuf->width,
 109         dmabuf->height,
 110         dmabuf->stride,
 111         dmabuf->fourcc,
 112         dmabuf->modifier,
 113         dmabuf->y0_top,
 114         G_DBUS_CALL_FLAGS_NONE,
 115         -1,
 116         fd_list,
 117         NULL, NULL, NULL);
 118 }
 119
 120 static void dbus_scanout_texture(DisplayChangeListener *dcl,
 121                                  uint32_t tex_id,
 122                                  bool backing_y_0_top,
 123                                  uint32_t backing_width,
 124                                  uint32_t backing_height,
 125                                  uint32_t x, uint32_t y,
 126                                  uint32_t w, uint32_t h)
 127 {
 128     QemuDmaBuf dmabuf = {
 129         .width = backing_width,
 130         .height = backing_height,
 131         .y0_top = backing_y_0_top,
 132     };
 133
 134     assert(tex_id);
 135     dmabuf.fd = egl_get_fd_for_texture(
 136         tex_id, (EGLint *)&dmabuf.stride,
 137         (EGLint *)&dmabuf.fourcc,
 138         &dmabuf.modifier);
 139     if (dmabuf.fd < 0) {
 140         error_report("%s: failed to get fd for texture", __func__);
 141         return;
 142     }
 143
 144     dbus_scanout_dmabuf(dcl, &dmabuf);
 145     close(dmabuf.fd);
 146 }
 147
 148 static void dbus_cursor_dmabuf(DisplayChangeListener *dcl,
 149                                QemuDmaBuf *dmabuf, bool have_hot,
 150                                uint32_t hot_x, uint32_t hot_y)
 151 {
 152     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 153     DisplaySurface *ds;
 154     GVariant *v_data = NULL;
 155     egl_fb cursor_fb = EGL_FB_INIT;
 156
 157     if (!dmabuf) {
 158         qemu_dbus_display1_listener_call_mouse_set(
 159             ddl->proxy, 0, 0, false,
 160             G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
 161         return;
 162     }
 163
 164     egl_dmabuf_import_texture(dmabuf);
 165     if (!dmabuf->texture) {
 166         return;
 167     }
 168     egl_fb_setup_for_tex(&cursor_fb, dmabuf->width, dmabuf->height,
 169                          dmabuf->texture, false);
 170     ds = qemu_create_displaysurface(dmabuf->width, dmabuf->height);
 171     egl_fb_read(ds, &cursor_fb);
 172
 173     v_data = g_variant_new_from_data(
 174         G_VARIANT_TYPE("ay"),
 175         surface_data(ds),
 176         surface_width(ds) * surface_height(ds) * 4,
 177         TRUE,
 178         (GDestroyNotify)qemu_free_displaysurface,
 179         ds);
 180     qemu_dbus_display1_listener_call_cursor_define(
 181         ddl->proxy,
 182         surface_width(ds),
 183         surface_height(ds),
 184         hot_x,
 185         hot_y,
 186         v_data,
 187         G_DBUS_CALL_FLAGS_NONE,
 188         -1,
 189         NULL,
 190         NULL,
 191         NULL);
 192 }
 193
 194 static void dbus_cursor_position(DisplayChangeListener *dcl,
 195                                  uint32_t pos_x, uint32_t pos_y)
 196 {
 197     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 198
 199     qemu_dbus_display1_listener_call_mouse_set(
 200         ddl->proxy, pos_x, pos_y, true,
 201         G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
 202 }
 203
 204 static void dbus_release_dmabuf(DisplayChangeListener *dcl,
 205                                 QemuDmaBuf *dmabuf)
 206 {
 207     dbus_scanout_disable(dcl);
 208 }
 209
 210 static void dbus_scanout_update(DisplayChangeListener *dcl,
 211                                 uint32_t x, uint32_t y,
 212                                 uint32_t w, uint32_t h)
 213 {
 214     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 215
 216     dbus_call_update_gl(ddl, x, y, w, h);
 217 }
 218
 219 static void dbus_gl_refresh(DisplayChangeListener *dcl)
 220 {
 221     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 222
 223     graphic_hw_update(dcl->con);
 224
 225     if (!ddl->ds || qemu_console_is_gl_blocked(ddl->dcl.con)) {
 226         return;
 227     }
 228
 229     if (ddl->gl_updates) {
 230         dbus_call_update_gl(ddl, 0, 0,
 231                             surface_width(ddl->ds), surface_height(ddl->ds));
 232         ddl->gl_updates = 0;
 233     }
 234 }
 235 #endif
 236
 237 static void dbus_refresh(DisplayChangeListener *dcl)
 238 {
 239     graphic_hw_update(dcl->con);
 240 }
 241
 242 #ifdef CONFIG_GBM
 243 static void dbus_gl_gfx_update(DisplayChangeListener *dcl,
 244                                int x, int y, int w, int h)
 245 {
 246     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 247
 248     ddl->gl_updates++;
 249 }
 250 #endif
 251
 252 static void dbus_gfx_update(DisplayChangeListener *dcl,
 253                             int x, int y, int w, int h)
 254 {
 255     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 256     pixman_image_t *img;
 257     GVariant *v_data;
 258     size_t stride;
 259
 260     assert(ddl->ds);
 261     stride = w * DIV_ROUND_UP(PIXMAN_FORMAT_BPP(surface_format(ddl->ds)), 8);
 262
 263     trace_dbus_update(x, y, w, h);
 264
 265     if (x == 0 && y == 0 && w == surface_width(ddl->ds) && h == surface_height(ddl->ds)) {
 266         v_data = g_variant_new_from_data(
 267             G_VARIANT_TYPE("ay"),
 268             surface_data(ddl->ds),
 269             surface_stride(ddl->ds) * surface_height(ddl->ds),
 270             TRUE,
 271             (GDestroyNotify)pixman_image_unref,
 272             pixman_image_ref(ddl->ds->image));
 273         qemu_dbus_display1_listener_call_scanout(
 274             ddl->proxy,
 275             surface_width(ddl->ds),
 276             surface_height(ddl->ds),
 277             surface_stride(ddl->ds),
 278             surface_format(ddl->ds),
 279             v_data,
 280             G_DBUS_CALL_FLAGS_NONE,
 281             DBUS_DEFAULT_TIMEOUT, NULL, NULL, NULL);
 282         return;
 283     }
 284
 285     /* make a copy, since gvariant only handles linear data */
 286     img = pixman_image_create_bits(surface_format(ddl->ds),
 287                                    w, h, NULL, stride);
 288     pixman_image_composite(PIXMAN_OP_SRC, ddl->ds->image, NULL, img,
 289                            x, y, 0, 0, 0, 0, w, h);
 290
 291     v_data = g_variant_new_from_data(
 292         G_VARIANT_TYPE("ay"),
 293         pixman_image_get_data(img),
 294         pixman_image_get_stride(img) * h,
 295         TRUE,
 296         (GDestroyNotify)pixman_image_unref,
 297         img);
 298     qemu_dbus_display1_listener_call_update(ddl->proxy,
 299         x, y, w, h, pixman_image_get_stride(img), pixman_image_get_format(img),
 300         v_data,
 301         G_DBUS_CALL_FLAGS_NONE,
 302         DBUS_DEFAULT_TIMEOUT, NULL, NULL, NULL);
 303 }
 304
 305 #ifdef CONFIG_GBM
 306 static void dbus_gl_gfx_switch(DisplayChangeListener *dcl,
 307                                struct DisplaySurface *new_surface)
 308 {
 309     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 310
 311     ddl->ds = new_surface;
 312     if (ddl->ds) {
 313         int width = surface_width(ddl->ds);
 314         int height = surface_height(ddl->ds);
 315
 316         /* TODO: lazy send dmabuf (there are unnecessary sent otherwise) */
 317         dbus_scanout_texture(&ddl->dcl, ddl->ds->texture, false,
 318                              width, height, 0, 0, width, height);
 319     }
 320 }
 321 #endif
 322
 323 static void dbus_gfx_switch(DisplayChangeListener *dcl,
 324                             struct DisplaySurface *new_surface)
 325 {
 326     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 327
 328     ddl->ds = new_surface;
 329     if (!ddl->ds) {
 330         /* why not call disable instead? */
 331         return;
 332     }
 333 }
 334
 335 static void dbus_mouse_set(DisplayChangeListener *dcl,
 336                            int x, int y, int on)
 337 {
 338     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 339
 340     qemu_dbus_display1_listener_call_mouse_set(
 341         ddl->proxy, x, y, on, G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
 342 }
 343
 344 static void dbus_cursor_define(DisplayChangeListener *dcl,
 345                                QEMUCursor *c)
 346 {
 347     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
 348     GVariant *v_data = NULL;
 349
 350     v_data = g_variant_new_from_data(
 351         G_VARIANT_TYPE("ay"),
 352         c->data,
 353         c->width * c->height * 4,
 354         TRUE,
 355         (GDestroyNotify)cursor_unref,
 356         cursor_ref(c));
 357
 358     qemu_dbus_display1_listener_call_cursor_define(
 359         ddl->proxy,
 360         c->width,
 361         c->height,
 362         c->hot_x,
 363         c->hot_y,
 364         v_data,
 365         G_DBUS_CALL_FLAGS_NONE,
 366         -1,
 367         NULL,
 368         NULL,
 369         NULL);
 370 }
 371
 372 #ifdef CONFIG_GBM
 373 const DisplayChangeListenerOps dbus_gl_dcl_ops = {
 374     .dpy_name                = "dbus-gl",
 375     .dpy_gfx_update          = dbus_gl_gfx_update,
 376     .dpy_gfx_switch          = dbus_gl_gfx_switch,
 377     .dpy_gfx_check_format    = console_gl_check_format,
 378     .dpy_refresh             = dbus_gl_refresh,
 379     .dpy_mouse_set           = dbus_mouse_set,
 380     .dpy_cursor_define       = dbus_cursor_define,
 381
 382     .dpy_gl_scanout_disable  = dbus_scanout_disable,
 383     .dpy_gl_scanout_texture  = dbus_scanout_texture,
 384     .dpy_gl_scanout_dmabuf   = dbus_scanout_dmabuf,
 385     .dpy_gl_cursor_dmabuf    = dbus_cursor_dmabuf,
 386     .dpy_gl_cursor_position  = dbus_cursor_position,
 387     .dpy_gl_release_dmabuf   = dbus_release_dmabuf,
 388     .dpy_gl_update           = dbus_scanout_update,
 389 };
 390 #endif
 391
 392 const DisplayChangeListenerOps dbus_dcl_ops = {
 393     .dpy_name                = "dbus",
 394     .dpy_gfx_update          = dbus_gfx_update,
 395     .dpy_gfx_switch          = dbus_gfx_switch,
 396     .dpy_refresh             = dbus_refresh,
 397     .dpy_mouse_set           = dbus_mouse_set,
 398     .dpy_cursor_define       = dbus_cursor_define,
 399 };
 400
 401 static void
 402 dbus_display_listener_dispose(GObject *object)
 403 {
 404     DBusDisplayListener *ddl = DBUS_DISPLAY_LISTENER(object);
 405
 406     unregister_displaychangelistener(&ddl->dcl);
 407     g_clear_object(&ddl->conn);
 408     g_clear_pointer(&ddl->bus_name, g_free);
 409     g_clear_object(&ddl->proxy);
 410
 411     G_OBJECT_CLASS(dbus_display_listener_parent_class)->dispose(object);
 412 }
 413
 414 static void
 415 dbus_display_listener_constructed(GObject *object)
 416 {
 417     DBusDisplayListener *ddl = DBUS_DISPLAY_LISTENER(object);
 418
 419     ddl->dcl.ops = &dbus_dcl_ops;
 420 #ifdef CONFIG_GBM
 421     if (display_opengl) {
 422         ddl->dcl.ops = &dbus_gl_dcl_ops;
 423     }
 424 #endif
 425
 426     G_OBJECT_CLASS(dbus_display_listener_parent_class)->constructed(object);
 427 }
 428
 429 static void
 430 dbus_display_listener_class_init(DBusDisplayListenerClass *klass)
 431 {
 432     GObjectClass *object_class = G_OBJECT_CLASS(klass);
 433
 434     object_class->dispose = dbus_display_listener_dispose;
 435     object_class->constructed = dbus_display_listener_constructed;
 436 }
 437
 438 static void
 439 dbus_display_listener_init(DBusDisplayListener *ddl)
 440 {
 441 }
 442
 443 const char *
 444 dbus_display_listener_get_bus_name(DBusDisplayListener *ddl)
 445 {
 446     return ddl->bus_name ?: "p2p";
 447 }
 448
 449 DBusDisplayConsole *
 450 dbus_display_listener_get_console(DBusDisplayListener *ddl)
 451 {
 452     return ddl->console;
 453 }
 454
 455 DBusDisplayListener *
 456 dbus_display_listener_new(const char *bus_name,
 457                           GDBusConnection *conn,
 458                           DBusDisplayConsole *console)
 459 {
 460     DBusDisplayListener *ddl;
 461     QemuConsole *con;
 462     g_autoptr(GError) err = NULL;
 463
 464     ddl = g_object_new(DBUS_DISPLAY_TYPE_LISTENER, NULL);
 465     ddl->proxy =
 466         qemu_dbus_display1_listener_proxy_new_sync(conn,
 467             G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
 468             NULL,
 469             "/org/qemu/Display1/Listener",
 470             NULL,
 471             &err);
 472     if (!ddl->proxy) {
 473         error_report("Failed to setup proxy: %s", err->message);
 474         g_object_unref(conn);
 475         g_object_unref(ddl);
 476         return NULL;
 477     }
 478
 479     ddl->bus_name = g_strdup(bus_name);
 480     ddl->conn = conn;
 481     ddl->console = console;
 482
 483     con = qemu_console_lookup_by_index(dbus_display_console_get_index(console));
 484     assert(con);
 485     ddl->dcl.con = con;
 486     register_displaychangelistener(&ddl->dcl);
 487
 488     return ddl;
 489 }