Adding upstream version 3.38.0.upstream/3.38.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 312 insertions, 0 deletions

diff --git a/tools/gnome-session-check-accelerated.c b/tools/gnome-session-check-accelerated.c
new file mode 100644
index 0000000..31f0a52
--- /dev/null
+++ b/tools/gnome-session-check-accelerated.c
@@ -0,0 +1,312 @@
+/* -*- mode:c; c-basic-offset: 8; indent-tabs-mode: nil; -*- */
+/* Tool to set the property _GNOME_SESSION_ACCELERATED on the root window */
+/*
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author:
+ *   Colin Walters <walters@verbum.org>
+ */
+
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <gtk/gtk.h>
+#include <epoxy/gl.h>
+#include <gdk/gdkx.h>
+#include <X11/Xatom.h>
+#include <sys/wait.h>
+
+#include "gnome-session-check-accelerated-common.h"
+
+/* Wait up to this long for a running check to finish */
+#define PROPERTY_CHANGE_TIMEOUT 5000
+
+/* Values used for the _GNOME_SESSION_ACCELERATED root window property */
+#define NO_ACCEL            0
+#define HAVE_ACCEL          1
+#define ACCEL_CHECK_RUNNING 2
+
+static Atom is_accelerated_atom;
+static Atom is_software_rendering_atom;
+static Atom renderer_atom;
+static gboolean property_changed;
+
+static gboolean
+on_property_notify_timeout (gpointer data)
+{
+        gtk_main_quit ();
+        return FALSE;
+}
+
+static GdkFilterReturn
+property_notify_filter (GdkXEvent *xevent,
+                        GdkEvent  *event,
+                        gpointer   data)
+{
+        XPropertyEvent *ev = xevent;
+
+        if (ev->type == PropertyNotify && ev->atom == is_accelerated_atom) {
+                property_changed = TRUE;
+                gtk_main_quit ();
+        }
+
+        return GDK_FILTER_CONTINUE;
+}
+
+static gboolean
+wait_for_property_notify (void)
+{
+        GdkDisplay *display;
+        GdkScreen *screen;
+        GdkWindow *root;
+        Window rootwin;
+
+        property_changed = FALSE;
+
+        display = gdk_display_get_default ();
+        screen = gdk_display_get_default_screen (display);
+        root = gdk_screen_get_root_window (screen);
+        rootwin = gdk_x11_window_get_xid (root);
+
+        XSelectInput (GDK_DISPLAY_XDISPLAY (display), rootwin, PropertyChangeMask);
+        gdk_window_add_filter (root, property_notify_filter, NULL);
+        g_timeout_add (PROPERTY_CHANGE_TIMEOUT, on_property_notify_timeout, NULL);
+
+        gtk_main ();
+
+        return property_changed;
+}
+
+static char *
+get_gtk_gles_renderer (void)
+{
+        GtkWidget *win;
+        GdkGLContext *context;
+        char *renderer = NULL;
+
+        win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+        gtk_widget_realize (win);
+        context = gdk_window_create_gl_context (gtk_widget_get_window (win), NULL);
+        if (!context)
+                return NULL;
+        gdk_gl_context_make_current (context);
+        renderer = g_strdup ((char *) glGetString (GL_RENDERER));
+        gdk_gl_context_clear_current ();
+        g_object_unref (context);
+
+        return renderer;
+}
+
+static gboolean
+is_discrete_gpu_check (void)
+{
+	const char *dri_prime;
+
+	dri_prime = g_getenv ("DRI_PRIME");
+	if (!dri_prime)
+		return FALSE;
+	if (*dri_prime != '1')
+		return FALSE;
+	return TRUE;
+}
+
+int
+main (int argc, char **argv)
+{
+        GdkDisplay *display = NULL;
+        int estatus;
+        char *gl_helper_argv[] = { LIBEXECDIR "/gnome-session-check-accelerated-gl-helper", "--print-renderer", NULL };
+        char *gles_helper_argv[] = { LIBEXECDIR "/gnome-session-check-accelerated-gles-helper", "--print-renderer", NULL };
+        char *renderer_string = NULL;
+        char *gl_renderer_string = NULL, *gles_renderer_string = NULL;
+        gboolean gl_software_rendering = FALSE, gles_software_rendering = FALSE;
+        Window rootwin;
+        glong is_accelerated, is_software_rendering;
+        GError *gl_error = NULL, *gles_error = NULL;
+
+        gtk_init (NULL, NULL);
+
+        /* gnome-session-check-accelerated gets run before X is started in the wayland
+         * case, and it currently requires X. Until we have that working, just always
+         * assume wayland will work.
+         * Also make sure that we don't read cached information about the first GPU
+         * when requesting information about the second.
+         */
+        if (is_discrete_gpu_check () || g_strcmp0 (g_getenv ("XDG_SESSION_TYPE"), "x11") != 0) {
+                renderer_string = get_gtk_gles_renderer ();
+                if (renderer_string) {
+                        g_print ("%s", renderer_string);
+                        return 0;
+                }
+                return 1;
+        }
+
+        display = gdk_display_get_default ();
+        /* when running on X11 with a nested wayland GDK will default to wayland
+         * so looking for X11 atoms will not work (and crash).
+         */
+        if (!GDK_IS_X11_DISPLAY (display)) {
+                g_printerr ("gnome-session-check-accelerated: no X11 display found\n");
+                return 1;
+        }
+
+        rootwin = gdk_x11_get_default_root_xwindow ();
+
+        is_accelerated_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_SESSION_ACCELERATED");
+        is_software_rendering_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_IS_SOFTWARE_RENDERING");
+        renderer_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_SESSION_RENDERER");
+
+        {
+                Atom type;
+                gint format;
+                gulong nitems;
+                gulong bytes_after;
+                guchar *data;
+
+ read:
+                gdk_x11_display_error_trap_push (display);
+                XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), rootwin,
+                                    is_accelerated_atom,
+                                    0, G_MAXLONG, False, XA_CARDINAL, &type, &format, &nitems,
+                                    &bytes_after, &data);
+                gdk_x11_display_error_trap_pop_ignored (display);
+
+                if (type == XA_CARDINAL) {
+                        glong *is_accelerated_ptr = (glong*) data;
+
+                        if (*is_accelerated_ptr == ACCEL_CHECK_RUNNING) {
+                                /* Test in progress, wait */
+                                if (wait_for_property_notify ())
+                                        goto read;
+                                /* else fall through and do the check ourselves */
+
+                        } else {
+                                gdk_x11_display_error_trap_push (display);
+                                XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), rootwin,
+                                                    renderer_atom,
+                                                    0, G_MAXLONG, False, XA_STRING, &type, &format, &nitems,
+                                                    &bytes_after, &data);
+                                gdk_x11_display_error_trap_pop_ignored (display);
+
+                                if (type == XA_STRING) {
+                                        g_print ("%s", data);
+                                }
+
+                                return (*is_accelerated_ptr == 0 ? 1 : 0);
+                        }
+                }
+        }
+
+        /* We don't have the property or it's the wrong type.
+         * Try to compute it now.
+         */
+
+        /* First indicate that a test is in progress */
+        is_accelerated = ACCEL_CHECK_RUNNING;
+        is_software_rendering = FALSE;
+        estatus = 1;
+
+        XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
+                         rootwin,
+                         is_accelerated_atom,
+                         XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_accelerated, 1);
+
+        gdk_display_sync (display);
+
+        /* First, try the GL helper */
+        if (g_spawn_sync (NULL, (char **) gl_helper_argv, NULL, 0,
+                           NULL, NULL, &gl_renderer_string, NULL, &estatus, &gl_error)) {
+                is_accelerated = (WEXITSTATUS(estatus) == HELPER_ACCEL);
+                gl_software_rendering = (WEXITSTATUS(estatus) == HELPER_SOFTWARE_RENDERING);
+                if (is_accelerated) {
+                        renderer_string = gl_renderer_string;
+                        goto finish;
+                }
+
+                g_printerr ("gnome-session-check-accelerated: GL Helper exited with code %d\n", estatus);
+        }
+
+        /* Then, try the GLES helper */
+        if (g_spawn_sync (NULL, (char **) gles_helper_argv, NULL, 0,
+                           NULL, NULL, &gles_renderer_string, NULL, &estatus, &gles_error)) {
+                is_accelerated = (WEXITSTATUS(estatus) == HELPER_ACCEL);
+                gles_software_rendering = (WEXITSTATUS(estatus) == HELPER_SOFTWARE_RENDERING);
+                if (is_accelerated) {
+                        renderer_string = gles_renderer_string;
+                        goto finish;
+                }
+
+                g_printerr ("gnome-session-check-accelerated: GLES Helper exited with code %d\n", estatus);
+        }
+
+        /* If we got here, GL software rendering is our best bet */
+        if (gl_software_rendering || gles_software_rendering) {
+                is_software_rendering = TRUE;
+                is_accelerated = TRUE;
+
+                if (gl_software_rendering)
+                        renderer_string = gl_renderer_string;
+                else if (gles_software_rendering)
+                        renderer_string = gles_renderer_string;
+
+                goto finish;
+        }
+
+        /* Both helpers failed; print their error messages */
+        if (gl_error != NULL) {
+                g_printerr ("gnome-session-check-accelerated: Failed to run GL helper: %s\n", gl_error->message);
+                g_clear_error (&gl_error);
+        }
+
+        if (gles_error != NULL) {
+                g_printerr ("gnome-session-check-accelerated: Failed to run GLES helper: %s\n", gles_error->message);
+                g_clear_error (&gles_error);
+        }
+
+ finish:
+	if (is_accelerated) {
+		XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
+				rootwin,
+				is_accelerated_atom,
+				XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_accelerated, 1);
+	}
+
+	if (is_software_rendering) {
+		XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
+				rootwin,
+				is_software_rendering_atom,
+				XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_software_rendering, 1);
+	}
+
+        if (renderer_string != NULL) {
+                XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
+				rootwin,
+				renderer_atom,
+				XA_STRING, 8, PropModeReplace, (guchar *) renderer_string, strlen (renderer_string));
+
+                /* Print the renderer */
+                g_print ("%s", renderer_string);
+        }
+
+        gdk_display_sync (display);
+
+        g_free (gl_renderer_string);
+        g_free (gles_renderer_string);
+
+        return is_accelerated ? 0 : 1;
+}