1 files changed, 59 insertions, 0 deletions
diff --git a/ui/console.c b/ui/console.c
index 6a1f49916e..6ab4ff3baf 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -2180,6 +2180,65 @@ PixelFormat qemu_default_pixelformat(int bpp)
     return pf;
 }
 
+static QemuDisplay *dpys[DISPLAY_TYPE__MAX];
+
+void qemu_display_register(QemuDisplay *ui)
+{
+    assert(ui->type < DISPLAY_TYPE__MAX);
+    dpys[ui->type] = ui;
+}
+
+bool qemu_display_find_default(DisplayOptions *opts)
+{
+    static DisplayType prio[] = {
+        DISPLAY_TYPE_GTK,
+        DISPLAY_TYPE_SDL,
+        DISPLAY_TYPE_COCOA
+    };
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(prio); i++) {
+        if (dpys[prio[i]] == NULL) {
+            ui_module_load_one(DisplayType_lookup.array[prio[i]]);
+        }
+        if (dpys[prio[i]] == NULL) {
+            continue;
+        }
+        opts->type = prio[i];
+        return true;
+    }
+    return false;
+}
+
+void qemu_display_early_init(DisplayOptions *opts)
+{
+    assert(opts->type < DISPLAY_TYPE__MAX);
+    if (opts->type == DISPLAY_TYPE_NONE) {
+        return;
+    }
+    if (dpys[opts->type] == NULL) {
+        ui_module_load_one(DisplayType_lookup.array[opts->type]);
+    }
+    if (dpys[opts->type] == NULL) {
+        error_report("Display '%s' is not available.",
+                     DisplayType_lookup.array[opts->type]);
+        exit(1);
+    }
+    if (dpys[opts->type]->early_init) {
+        dpys[opts->type]->early_init(opts);
+    }
+}
+
+void qemu_display_init(DisplayState *ds, DisplayOptions *opts)
+{
+    assert(opts->type < DISPLAY_TYPE__MAX);
+    if (opts->type == DISPLAY_TYPE_NONE) {
+        return;
+    }
+    assert(dpys[opts->type] != NULL);
+    dpys[opts->type]->init(ds, opts);
+}
+
 void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp)
 {
     int val;