[gdk-pixbuf] Avoid a discrepancy in file recognition

[Matthias Clasen <matthiasc src gnome org>]

commit 496d8e39a6eec38ab0b6493736488418ec2d7000
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Dec 19 00:26:24 2013 -0500

    Avoid a discrepancy in file recognition
    
    We are using a loader to implement some of the APIs that
    are taking a filename, such as gdk_pixbuf_new_from_file_at_scale.
    But the loader does not have the filename, so it can't use it
    when determining the image type. This makes a difference for
    types such as xbm, which have no good magic in the mime database.
    Fix this by introducing a private API that lets us pass the
    filename on to the loader.

 gdk-pixbuf/gdk-pixbuf-io.c      |    4 ++--
 gdk-pixbuf/gdk-pixbuf-loader.c  |   19 ++++++++++++++++++-
 gdk-pixbuf/gdk-pixbuf-private.h |    3 +++
 3 files changed, 23 insertions(+), 3 deletions(-)
---
diff --git a/gdk-pixbuf/gdk-pixbuf-io.c b/gdk-pixbuf/gdk-pixbuf-io.c
index 0ef83b4..0cb6ed3 100644
--- a/gdk-pixbuf/gdk-pixbuf-io.c
+++ b/gdk-pixbuf/gdk-pixbuf-io.c
@@ -1351,7 +1351,7 @@ gdk_pixbuf_new_from_file_at_scale (const char *filename,
                 return NULL;
         }
 
-        loader = gdk_pixbuf_loader_new ();
+        loader = _gdk_pixbuf_loader_new_with_filename (filename);
 
         info.width = width;
         info.height = height;
@@ -1909,7 +1909,7 @@ gdk_pixbuf_get_file_info (const gchar  *filename,
         if (!f)
                 return NULL;
 
-        loader = gdk_pixbuf_loader_new ();
+        loader = _gdk_pixbuf_loader_new_with_filename (filename);
 
         info.format = NULL;
         info.width = -1;
diff --git a/gdk-pixbuf/gdk-pixbuf-loader.c b/gdk-pixbuf/gdk-pixbuf-loader.c
index 5cf3f74..a567de3 100644
--- a/gdk-pixbuf/gdk-pixbuf-loader.c
+++ b/gdk-pixbuf/gdk-pixbuf-loader.c
@@ -123,10 +123,12 @@ typedef struct
         gint height;
         gboolean size_fixed;
         gboolean needs_scale;
+       gchar *filename;
 } GdkPixbufLoaderPrivate;
 
 G_DEFINE_TYPE (GdkPixbufLoader, gdk_pixbuf_loader, G_TYPE_OBJECT)
 
+
 static void
 gdk_pixbuf_loader_class_init (GdkPixbufLoaderClass *class)
 {
@@ -250,6 +252,8 @@ gdk_pixbuf_loader_finalize (GObject *object)
         if (priv->animation)
                 g_object_unref (priv->animation);
   
+       g_free (priv->filename);
+
         g_free (priv);
   
         G_OBJECT_CLASS (gdk_pixbuf_loader_parent_class)->finalize (object);
@@ -412,7 +416,7 @@ gdk_pixbuf_loader_load_module (GdkPixbufLoader *loader,
                 {
                         priv->image_module = _gdk_pixbuf_get_module (priv->header_buf,
                                                                      priv->header_buf_offset,
-                                                                     NULL,
+                                                                     priv->filename,
                                                                      error);
                 }
   
@@ -702,6 +706,19 @@ gdk_pixbuf_loader_new_with_mime_type (const char *mime_type,
         return retval;
 }
 
+GdkPixbufLoader *
+_gdk_pixbuf_loader_new_with_filename (const char *filename)
+{
+       GdkPixbufLoader *retval;
+        GdkPixbufLoaderPrivate *priv;
+
+        retval = g_object_new (GDK_TYPE_PIXBUF_LOADER, NULL);
+       priv = retval->priv;
+       priv->filename = g_strdup (filename);
+
+       return retval;
+}
+
 /**
  * gdk_pixbuf_loader_get_pixbuf:
  * @loader: A pixbuf loader.
diff --git a/gdk-pixbuf/gdk-pixbuf-private.h b/gdk-pixbuf/gdk-pixbuf-private.h
index 444ff37..8f51307 100644
--- a/gdk-pixbuf/gdk-pixbuf-private.h
+++ b/gdk-pixbuf/gdk-pixbuf-private.h
@@ -32,6 +32,7 @@
 #include <glib-object.h>
 
 #include "gdk-pixbuf-core.h"
+#include "gdk-pixbuf-loader.h"
 #include "gdk-pixbuf-io.h"
 #include "gdk-pixbuf-i18n.h"
 
@@ -99,9 +100,11 @@ GdkPixbuf *_gdk_pixbuf_generic_image_load (GdkPixbufModule *image_module,
 
 GdkPixbufFormat *_gdk_pixbuf_get_format (GdkPixbufModule *image_module);
 
+
 #endif /* GDK_PIXBUF_ENABLE_BACKEND */
 
 GdkPixbuf * _gdk_pixbuf_new_from_resource_try_mmap (const char *resource_path);
+GdkPixbufLoader *_gdk_pixbuf_loader_new_with_filename (const char *filename);
 
 #endif /* GDK_PIXBUF_PRIVATE_H */