1 files changed, 113 insertions, 0 deletions
diff --git a/Sources/Compositor/OwlSubcompositor.m b/Sources/Compositor/OwlSubcompositor.m
new file mode 100644
index 0000000..fd633d3
--- /dev/null
+++ b/Sources/Compositor/OwlSubcompositor.m
@@ -0,0 +1,113 @@
+/* This file is part of Owl.
+ *
+ * Copyright © 2019-2021 Sergey Bugaev <bugaevc@gmail.com>
+ *
+ * Owl is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * Owl is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Owl.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#import "OwlSubcompositor.h"
+#import "OwlSurface.h"
+#import "OwlSubsurface.h"
+
+
+@implementation OwlSubcompositor
+
+static void subcompositor_destroy_handler(
+    struct wl_client *client,
+    struct wl_resource *resource
+) {
+    wl_resource_destroy(resource);
+}
+
+static void subcompositor_destroy(struct wl_resource *resource) {
+    OwlSubcompositor *self = wl_resource_get_user_data(resource);
+    [self release];
+}
+
+static void subcompositor_get_subsurface_handler(
+    struct wl_client *client,
+    struct wl_resource *resource,
+    uint32_t id,
+    struct wl_resource *surface_resource,
+    struct wl_resource *parent_resource
+) {
+    struct wl_resource *subsurface_resource = wl_resource_create(
+        client,
+        &wl_subsurface_interface,
+        1,
+        id
+    );
+    OwlSurface *surface = wl_resource_get_user_data(surface_resource);
+    OwlSurface *parent = wl_resource_get_user_data(parent_resource);
+
+#if 0
+    // FIXME: This line doesn't compile anymore on Hurd for some reason, WTF?
+    if ([surface role] != nil) {
+        const char *role = [[[surface role] description] UTF8String];
+        wl_resource_post_error(
+            resource,
+            WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
+            "Surface already has another role: %s",
+            role
+        );
+        return;
+    }
+#endif
+    [[[OwlSubsurface alloc] initWithResource: subsurface_resource
+                                     surface: surface
+                                      parent: parent] release];
+}
+
+static const struct wl_subcompositor_interface subcompositor_impl = {
+    .destroy = subcompositor_destroy_handler,
+    .get_subsurface = subcompositor_get_subsurface_handler
+};
+
+- (id) initWithResource: (struct wl_resource *) resource {
+    _resource = resource;
+    wl_resource_set_implementation(
+        resource,
+        &subcompositor_impl,
+        [self retain],
+        subcompositor_destroy
+    );
+    return self;
+}
+
+static void subcompositor_bind(
+    struct wl_client *client,
+    void *data,
+    uint32_t version,
+    uint32_t id
+) {
+    struct wl_resource *resource = wl_resource_create(
+        client,
+        &wl_subcompositor_interface,
+        version,
+        id
+    );
+    [[[OwlSubcompositor alloc] initWithResource: resource] release];
+}
+
++ (void) addGlobalToDisplay: (struct wl_display *) display {
+    wl_global_create(
+        display,
+        &wl_subcompositor_interface,
+        1,
+        NULL,
+        subcompositor_bind
+    );
+}
+
+@end