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