[gnome-color-manager: 17/18] At login automatically generate an ICC profile from the EDID and add it to each display device

[Richard Hughes <rhughes src gnome org>]

commit a4210fa41b06bec742ba6b5d80311396d71813c1
Author: Richard Hughes <richard hughsie com>
Date:   Fri Oct 8 18:06:43 2010 +0100

    At login automatically generate an ICC profile from the EDID and add it to each display device
    
    Note, we've taken great pains to deal with configs where people
    have already assigned profiles, and just provide the auto-edid
    profiles as additional options in the chooser.
    
    You can set use-edid-profile=false in your device-profiles.conf
    file if this behaviour is not-desired.

 src/gcm-apply.c |   81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 80 insertions(+), 1 deletions(-)
---
diff --git a/src/gcm-apply.c b/src/gcm-apply.c
index 99aa7f2..e538eae 100644
--- a/src/gcm-apply.c
+++ b/src/gcm-apply.c
@@ -33,6 +33,66 @@
 #include "gcm-device-xrandr.h"
 
 /**
+ * gcm_apply_create_icc_profile_for_edid:
+ **/
+static gboolean
+gcm_apply_create_icc_profile_for_edid (GcmDevice *device, const gchar *filename, GError **error)
+{
+	gboolean ret = FALSE;
+	GcmProfile *profile;
+
+	/* generate */
+	profile = gcm_device_generate_profile (device, error);
+	if (profile == NULL)
+		goto out;
+
+	/* ensure the per-user directory exists */
+	ret = gcm_utils_mkdir_for_filename (filename, error);
+	if (!ret)
+		goto out;
+
+	/* save this */
+	ret = gcm_profile_save (profile, filename, error);
+	if (!ret)
+		goto out;
+
+	/*
+	 * When we get here there are 4 possible situations:
+	 *
+	 * 1. profiles assigned, use-edid-profile=TRUE		-> add to profiles if not already added, but not as default
+	 * 2. profiles assigned, use-edid-profile=FALSE		-> do nothing
+	 * 3. no profiles, use-edid-profile=TRUE		-> add to profiles as default
+	 * 4. no profiles, use-edid-profile=FALSE		-> do nothing
+	 */
+
+	/* do we set this by default? */
+	if (!gcm_device_get_use_edid_profile (device)) {
+		egg_debug ("not using auto-edid profile as device profile");
+		goto out;
+	}
+
+	/* add to the profiles list */
+	ret = gcm_device_add_profile (device, profile);
+	if (ret) {
+		/* need to save new list */
+		ret = gcm_device_save (device, error);
+		if (!ret)
+			goto out;
+	} else {
+		/* if this failed, it's because it's already associated
+		 * with the device which is okay with us */
+		egg_debug ("already added auto-edid profile, not adding %s",
+			   gcm_profile_get_checksum (profile));
+		ret = TRUE;
+	}
+
+out:
+	if (profile != NULL)
+		g_object_unref (profile);
+	return ret;
+}
+
+/**
  * main:
  **/
 int
@@ -47,6 +107,8 @@ main (int argc, char **argv)
 	guint i;
 	GcmClient *client = NULL;
 	GcmDevice *device;
+	gchar *filename;
+	gchar *path;
 
 	const GOptionEntry options[] = {
 		{ "login", 'l', 0, G_OPTION_ARG_NONE, &login,
@@ -99,8 +161,25 @@ main (int argc, char **argv)
 		/* optimize for login to save a few hundred ms */
 		gcm_device_xrandr_set_remove_atom (GCM_DEVICE_XRANDR (device), !login);
 
+		/* do we have to generate a edid profile? */
+		filename = g_strdup_printf ("edid-%s.icc", gcm_device_xrandr_get_edid_md5 (GCM_DEVICE_XRANDR (device)));
+		path = g_build_filename (g_get_user_data_dir (), "icc", filename, NULL);
+		if (g_file_test (path, G_FILE_TEST_EXISTS)) {
+			egg_debug ("auto-profile edid %s exists", path);
+		} else {
+			egg_debug ("auto-profile edid does not exist, creating as %s", path);
+			ret = gcm_apply_create_icc_profile_for_edid (device, path, &error);
+			if (!ret) {
+				egg_warning ("failed to create profile from EDID data: %s",
+					     error->message);
+				g_clear_error (&error);
+			}
+		}
+		g_free (filename);
+		g_free (path);
+
 		/* set gamma for device */
-		egg_debug ("setting profiles on device: %s", gcm_device_get_id (device));
+		egg_debug ("applying default profile for device: %s", gcm_device_get_id (device));
 		ret = gcm_device_apply (device, &error);
 		if (!ret) {
 			retval = 1;