1 files changed, 231 insertions, 0 deletions
diff --git a/present/present_screen.c b/present/present_screen.c
new file mode 100644
index 000000000..50b2b2d23
--- /dev/null
+++ b/present/present_screen.c
@@ -0,0 +1,231 @@
+/*
+ * 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 "present_priv.h"
+
+int present_request;
+DevPrivateKeyRec present_screen_private_key;
+DevPrivateKeyRec present_window_private_key;
+
+/*
+ * Get a pointer to a present window private, creating if necessary
+ */
+present_window_priv_ptr
+present_get_window_priv(WindowPtr window, Bool create)
+{
+    present_window_priv_ptr window_priv = present_window_priv(window);
+
+    if (!create || window_priv != NULL)
+        return window_priv;
+    window_priv = calloc (1, sizeof (present_window_priv_rec));
+    if (!window_priv)
+        return NULL;
+    xorg_list_init(&window_priv->vblank);
+    xorg_list_init(&window_priv->notifies);
+    dixSetPrivate(&window->devPrivates, &present_window_private_key, window_priv);
+    return window_priv;
+}
+
+/*
+ * Hook the close screen function to clean up our screen private
+ */
+static Bool
+present_close_screen(ScreenPtr screen)
+{
+    present_screen_priv_ptr screen_priv = present_screen_priv(screen);
+
+    present_flip_destroy(screen);
+
+    unwrap(screen_priv, screen, CloseScreen);
+    (*screen->CloseScreen) (screen);
+    free(screen_priv);
+    return TRUE;
+}
+
+/*
+ * Free any queued presentations for this window
+ */
+static void
+present_free_window_vblank(WindowPtr window)
+{
+    present_window_priv_ptr     window_priv = present_window_priv(window);
+    present_vblank_ptr          vblank, tmp;
+
+    xorg_list_for_each_entry_safe(vblank, tmp, &window_priv->vblank, window_list) {
+        present_abort_vblank(window->drawable.pScreen, vblank->crtc, vblank->event_id, vblank->target_msc);
+        present_vblank_destroy(vblank);
+    }
+}
+
+/*
+ * Clean up any pending or current flips for this window
+ */
+static void
+present_clear_window_flip(WindowPtr window)
+{
+    ScreenPtr                   screen = window->drawable.pScreen;
+    present_screen_priv_ptr     screen_priv = present_screen_priv(screen);
+    present_vblank_ptr          flip_pending = screen_priv->flip_pending;
+
+    if (flip_pending && flip_pending->window == window) {
+        assert (flip_pending->abort_flip);
+        flip_pending->window_destroyed = TRUE;
+    }
+    if (screen_priv->flip_window == window)
+        screen_priv->flip_window = NULL;
+}
+
+/*
+ * Hook the close window function to clean up our window private
+ */
+static Bool
+present_destroy_window(WindowPtr window)
+{
+    Bool ret;
+    ScreenPtr screen = window->drawable.pScreen;
+    present_screen_priv_ptr screen_priv = present_screen_priv(screen);
+    present_window_priv_ptr window_priv = present_window_priv(window);
+
+    if (window_priv) {
+        present_clear_window_notifies(window);
+        present_free_events(window);
+        present_free_window_vblank(window);
+        present_clear_window_flip(window);
+        free(window_priv);
+    }
+    unwrap(screen_priv, screen, DestroyWindow);
+    if (screen->DestroyWindow)
+        ret = screen->DestroyWindow (window);
+    else
+        ret = TRUE;
+    wrap(screen_priv, screen, DestroyWindow, present_destroy_window);
+    return ret;
+}
+
+/*
+ * Hook the config notify screen function to deliver present config notify events
+ */
+static int
+present_config_notify(WindowPtr window,
+                   int x, int y, int w, int h, int bw,
+                   WindowPtr sibling)
+{
+    int ret;
+    ScreenPtr screen = window->drawable.pScreen;
+    present_screen_priv_ptr screen_priv = present_screen_priv(screen);
+
+    present_send_config_notify(window, x, y, w, h, bw, sibling);
+
+    unwrap(screen_priv, screen, ConfigNotify);
+    if (screen->ConfigNotify)
+        ret = screen->ConfigNotify (window, x, y, w, h, bw, sibling);
+    else
+        ret = 0;
+    wrap(screen_priv, screen, ConfigNotify, present_config_notify);
+    return ret;
+}
+
+/*
+ * Hook the clip notify screen function to un-flip as necessary
+ */
+
+static void
+present_clip_notify(WindowPtr window, int dx, int dy)
+{
+    ScreenPtr screen = window->drawable.pScreen;
+    present_screen_priv_ptr screen_priv = present_screen_priv(screen);
+
+    present_check_flip_window(window);
+    unwrap(screen_priv, screen, ClipNotify)
+    if (screen->ClipNotify)
+        screen->ClipNotify (window, dx, dy);
+    wrap(screen_priv, screen, ClipNotify, present_clip_notify);
+}
+
+/*
+ * Initialize a screen for use with present
+ */
+int
+present_screen_init(ScreenPtr screen, present_screen_info_ptr info)
+{
+    if (!dixRegisterPrivateKey(&present_screen_private_key, PRIVATE_SCREEN, 0))
+        return FALSE;
+
+    if (!dixRegisterPrivateKey(&present_window_private_key, PRIVATE_WINDOW, 0))
+        return FALSE;
+
+    if (!present_screen_priv(screen)) {
+        present_screen_priv_ptr screen_priv = calloc(1, sizeof (present_screen_priv_rec));
+        if (!screen_priv)
+            return FALSE;
+
+        wrap(screen_priv, screen, CloseScreen, present_close_screen);
+        wrap(screen_priv, screen, DestroyWindow, present_destroy_window);
+        wrap(screen_priv, screen, ConfigNotify, present_config_notify);
+        wrap(screen_priv, screen, ClipNotify, present_clip_notify);
+
+        screen_priv->info = info;
+
+        dixSetPrivate(&screen->devPrivates, &present_screen_private_key, screen_priv);
+
+        present_fake_screen_init(screen);
+    }
+
+    return TRUE;
+}
+
+/*
+ * Initialize the present extension
+ */
+void
+present_extension_init(void)
+{
+    ExtensionEntry *extension;
+    int i;
+
+    extension = AddExtension(PRESENT_NAME, PresentNumberEvents, PresentNumberErrors,
+                             proc_present_dispatch, sproc_present_dispatch,
+                             NULL, StandardMinorOpcode);
+    if (!extension)
+        goto bail;
+
+    present_request = extension->base;
+
+    if (!present_init())
+        goto bail;
+
+    if (!present_event_init())
+        goto bail;
+
+    for (i = 0; i < screenInfo.numScreens; i++) {
+        if (!present_screen_init(screenInfo.screens[i], NULL))
+            goto bail;
+    }
+    return;
+
+bail:
+    FatalError("Cannot initialize Present extension");
+}