pixbuf-utils: copy the generic pixbuf-related utily functions from Empathy

This commit also changes the licence of the moved code from GPL to LGPL.
See GOSSIP-RELICENSING.txt for details.

https://bugzilla.gnome.org/show_bug.cgi?id=699492

4 files changed, 238 insertions, 4 deletions

diff --git a/tp-account-widgets/Makefile.am b/tp-account-widgets/Makefile.am
index fa79032f..968e6261 100644
--- a/tp-account-widgets/Makefile.am
+++ b/tp-account-widgets/Makefile.am
@@ -42,6 +42,7 @@ libtp_account_widgets_sources =            	\
 	tpaw-irc-network.c			\
 	tpaw-irc-server.c			\
 	tpaw-live-search.c			\
+	tpaw-pixbuf-utils.c			\
 	tpaw-string-parser.c			\
 	tpaw-time.c				\
 	tpaw-user-info.c			\
@@ -70,6 +71,7 @@ libtp_account_widgets_headers =			\
 	tpaw-irc-network.h			\
 	tpaw-irc-server.h			\
 	tpaw-live-search.h			\
+	tpaw-pixbuf-utils.h			\
 	tpaw-string-parser.h			\
 	tpaw-time.h				\
 	tpaw-user-info.h			\
diff --git a/tp-account-widgets/tpaw-avatar-chooser.c b/tp-account-widgets/tpaw-avatar-chooser.c
index 6a5b83b4..77d4a0b7 100644
--- a/tp-account-widgets/tpaw-avatar-chooser.c
+++ b/tp-account-widgets/tpaw-avatar-chooser.c
@@ -27,6 +27,7 @@
 #include <tp-account-widgets/tpaw-camera-monitor.h>
 #include <tp-account-widgets/tpaw-gsettings.h>
 #include <tp-account-widgets/tpaw-images.h>
+#include <tp-account-widgets/tpaw-pixbuf-utils.h>
 #include <tp-account-widgets/tpaw-utils.h>
 
 #ifdef HAVE_CHEESE
@@ -145,7 +146,7 @@ get_avatar_cb (GObject *source,
       goto out;
     }
 
-  pixbuf = empathy_pixbuf_from_data_and_mime ((gchar *) avatar->data,
+  pixbuf = tpaw_pixbuf_from_data_and_mime ((gchar *) avatar->data,
       avatar->len, &mime_type);
   if (pixbuf == NULL)
     {
@@ -725,7 +726,7 @@ avatar_chooser_set_image (TpawAvatarChooser *self,
 
   self->priv->changed = TRUE;
 
-  pixbuf_view = empathy_pixbuf_scale_down_if_necessary (pixbuf,
+  pixbuf_view = tpaw_pixbuf_scale_down_if_necessary (pixbuf,
       AVATAR_SIZE_VIEW);
   image = gtk_image_new_from_pixbuf (pixbuf_view);
 
@@ -751,7 +752,7 @@ avatar_chooser_set_image_from_data (TpawAvatarChooser *self,
       return;
     }
 
-  pixbuf = empathy_pixbuf_from_data_and_mime (data, size, &mime_type);
+  pixbuf = tpaw_pixbuf_from_data_and_mime (data, size, &mime_type);
   if (pixbuf == NULL)
     {
       g_free (data);
@@ -844,7 +845,7 @@ avatar_chooser_update_preview_cb (GtkFileChooser *file_chooser,
 
       if (pixbuf != NULL)
         {
-          scaled_pixbuf = empathy_pixbuf_scale_down_if_necessary (pixbuf,
+          scaled_pixbuf = tpaw_pixbuf_scale_down_if_necessary (pixbuf,
               AVATAR_SIZE_SAVE);
 
           gtk_image_set_from_pixbuf (GTK_IMAGE (image), scaled_pixbuf);
diff --git a/tp-account-widgets/tpaw-pixbuf-utils.c b/tp-account-widgets/tpaw-pixbuf-utils.c
new file mode 100644
index 00000000..1b226e92
--- /dev/null
+++ b/tp-account-widgets/tpaw-pixbuf-utils.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2002-2007 Imendio AB
+ * Copyright (C) 2007-2013 Collabora Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Authors: Mikael Hallendal <micke@imendio.com>
+ *          Richard Hult <richard@imendio.com>
+ *          Martyn Russell <martyn@imendio.com>
+ *          Xavier Claessens <xclaesse@gmail.com>
+ *          Travis Reitter <travis.reitter@collabora.co.uk>
+ */
+
+#include "config.h"
+#include "tpaw-pixbuf-utils.h"
+
+#include <gdk/gdkx.h>
+
+#define DEBUG_FLAG EMPATHY_DEBUG_OTHER
+#include "empathy-debug.h"
+
+GdkPixbuf *
+tpaw_pixbuf_from_data (gchar *data,
+    gsize data_size)
+{
+  return tpaw_pixbuf_from_data_and_mime (data, data_size, NULL);
+}
+
+GdkPixbuf *
+tpaw_pixbuf_from_data_and_mime (gchar *data,
+           gsize data_size,
+           gchar **mime_type)
+{
+  GdkPixbufLoader *loader;
+  GdkPixbufFormat *format;
+  GdkPixbuf *pixbuf = NULL;
+  gchar **mime_types;
+  GError *error = NULL;
+
+  if (!data)
+    return NULL;
+
+  loader = gdk_pixbuf_loader_new ();
+  if (!gdk_pixbuf_loader_write (loader, (guchar *) data, data_size, &error))
+    {
+      DEBUG ("Failed to write to pixbuf loader: %s",
+        error ? error->message : "No error given");
+      goto out;
+    }
+
+  if (!gdk_pixbuf_loader_close (loader, &error))
+    {
+      DEBUG ("Failed to close pixbuf loader: %s",
+        error ? error->message : "No error given");
+      goto out;
+    }
+
+  pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
+  if (pixbuf)
+    {
+      g_object_ref (pixbuf);
+
+      if (mime_type != NULL)
+        {
+          format = gdk_pixbuf_loader_get_format (loader);
+          mime_types = gdk_pixbuf_format_get_mime_types (format);
+
+          *mime_type = g_strdup (*mime_types);
+          if (mime_types[1] != NULL)
+            DEBUG ("Loader supports more than one mime "
+              "type! Picking the first one, %s",
+              *mime_type);
+
+          g_strfreev (mime_types);
+        }
+    }
+
+out:
+  g_clear_error (&error);
+  g_object_unref (loader);
+
+  return pixbuf;
+}
+
+GdkPixbuf *
+tpaw_pixbuf_scale_down_if_necessary (GdkPixbuf *pixbuf,
+    gint max_size)
+{
+  gint width, height;
+  gdouble factor;
+
+  width = gdk_pixbuf_get_width (pixbuf);
+  height = gdk_pixbuf_get_height (pixbuf);
+
+  if (width > 0 && (width > max_size || height > max_size))
+    {
+      factor = (gdouble) max_size / MAX (width, height);
+
+      width = width * factor;
+      height = height * factor;
+
+      return gdk_pixbuf_scale_simple (pixbuf, width, height, GDK_INTERP_HYPER);
+    }
+
+  return g_object_ref (pixbuf);
+}
+
+GdkPixbuf *
+tpaw_pixbuf_from_icon_name_sized (const gchar *icon_name,
+    gint size)
+{
+  GtkIconTheme *theme;
+  GdkPixbuf *pixbuf;
+  GError *error = NULL;
+
+  if (!icon_name)
+    return NULL;
+
+  theme = gtk_icon_theme_get_default ();
+
+  pixbuf = gtk_icon_theme_load_icon (theme, icon_name, size, 0, &error);
+
+  if (error)
+    {
+      DEBUG ("Error loading icon: %s", error->message);
+      g_clear_error (&error);
+    }
+
+  return pixbuf;
+}
+
+GdkPixbuf *
+tpaw_pixbuf_from_icon_name (const gchar *icon_name,
+    GtkIconSize  icon_size)
+{
+  gint w, h;
+  gint size = 48;
+
+  if (!icon_name)
+    return NULL;
+
+  if (gtk_icon_size_lookup (icon_size, &w, &h))
+    size = (w + h) / 2;
+
+  return tpaw_pixbuf_from_icon_name_sized (icon_name, size);
+}
+
+gchar *
+tpaw_filename_from_icon_name (const gchar *icon_name,
+    GtkIconSize icon_size)
+{
+  GtkIconTheme *icon_theme;
+  GtkIconInfo *icon_info;
+  gint w, h;
+  gint size = 48;
+  gchar *ret;
+
+  icon_theme = gtk_icon_theme_get_default ();
+
+  if (gtk_icon_size_lookup (icon_size, &w, &h))
+    size = (w + h) / 2;
+
+  icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, size, 0);
+  if (icon_info == NULL)
+    return NULL;
+
+  ret = g_strdup (gtk_icon_info_get_filename (icon_info));
+  gtk_icon_info_free (icon_info);
+
+  return ret;
+}
diff --git a/tp-account-widgets/tpaw-pixbuf-utils.h b/tp-account-widgets/tpaw-pixbuf-utils.h
new file mode 100644
index 00000000..0521f71a
--- /dev/null
+++ b/tp-account-widgets/tpaw-pixbuf-utils.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2002-2007 Imendio AB
+ * Copyright (C) 2007-2013 Collabora Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ * Authors: Mikael Hallendal <micke@imendio.com>
+ *          Richard Hult <richard@imendio.com>
+ *          Martyn Russell <martyn@imendio.com>
+ *          Xavier Claessens <xclaesse@gmail.com>
+ *          Travis Reitter <travis.reitter@collabora.co.uk>
+ */
+
+#ifndef __TPAW_UI_UTILS_H__
+#define __TPAW_UI_UTILS_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+GdkPixbuf * tpaw_pixbuf_from_data (gchar *data,
+    gsize data_size);
+GdkPixbuf * tpaw_pixbuf_from_data_and_mime (gchar *data,
+    gsize data_size,
+    gchar **mime_type);
+GdkPixbuf * tpaw_pixbuf_scale_down_if_necessary (GdkPixbuf *pixbuf,
+    gint max_size);
+GdkPixbuf * tpaw_pixbuf_from_icon_name (const gchar *icon_name,
+    GtkIconSize icon_size);
+GdkPixbuf * tpaw_pixbuf_from_icon_name_sized (const gchar *icon_name,
+    gint size);
+gchar * tpaw_filename_from_icon_name (const gchar *icon_name,
+    GtkIconSize icon_size);
+
+G_END_DECLS
+
+#endif /*  __TPAW_UI_UTILS_H__ */