dri3: Add DRI3 extension

Adds DRM compatible fences using futexes.
Uses FD passing to get pixmaps from DRM applications.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/dri3/dri3.c b/dri3/dri3.c
new file mode 100644
index 000000000..2bca7ae9b
--- /dev/null
+++ b/dri3/dri3.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright © 2013 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include "dri3_priv.h"
+
+int dri3_request;
+DevPrivateKeyRec dri3_screen_private_key;
+DevPrivateKeyRec dri3_window_private_key;
+
+static Bool
+dri3_close_screen(ScreenPtr screen)
+{
+    dri3_screen_priv_ptr screen_priv = dri3_screen_priv(screen);
+
+    unwrap(screen_priv, screen, CloseScreen);
+
+    free(screen_priv);
+    return (*screen->CloseScreen) (screen);
+}
+
+Bool
+dri3_screen_init(ScreenPtr screen, dri3_screen_info_ptr info)
+{
+    if (!dixRegisterPrivateKey(&dri3_screen_private_key, PRIVATE_SCREEN, 0))
+        return FALSE;
+
+    if (!dri3_screen_priv(screen)) {
+        dri3_screen_priv_ptr screen_priv = calloc(1, sizeof (dri3_screen_priv_rec));
+        if (!screen_priv)
+            return FALSE;
+
+        wrap(screen_priv, screen, CloseScreen, dri3_close_screen);
+
+        screen_priv->info = info;
+
+        dixSetPrivate(&screen->devPrivates, &dri3_screen_private_key, screen_priv);
+    }
+
+    return TRUE;
+}
+
+void
+dri3_extension_init(void)
+{
+    ExtensionEntry *extension;
+    int i;
+
+    extension = AddExtension(DRI3_NAME, DRI3NumberEvents, DRI3NumberErrors,
+                             proc_dri3_dispatch, sproc_dri3_dispatch,
+                             NULL, StandardMinorOpcode);
+    if (!extension)
+        goto bail;
+
+    dri3_request = extension->base;
+
+    for (i = 0; i < screenInfo.numScreens; i++) {
+        if (!dri3_screen_init(screenInfo.screens[i], NULL))
+            goto bail;
+    }
+    return;
+
+bail:
+    FatalError("Cannot initialize DRI3 extension");
+}