[gtk/image-loading: 7/28] Add gdk_texture_new_from_bytes

[Matthias Clasen <matthiasc src gnome org>]

commit 662fb014aef0f8a2550a355b6d233ab7c4923db2
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Sep 13 13:30:12 2021 -0400

    Add gdk_texture_new_from_bytes
    
    Add this new api, and make gdk_texture_new_from_file
    a wrapper around it.

 gdk/gdktexture.c | 44 ++++++++++++++++++++++++++++++++++++++++----
 gdk/gdktexture.h |  3 +++
 2 files changed, 43 insertions(+), 4 deletions(-)
---
diff --git a/gdk/gdktexture.c b/gdk/gdktexture.c
index 7b055238fd..ee7570e7e7 100644
--- a/gdk/gdktexture.c
+++ b/gdk/gdktexture.c
@@ -383,19 +383,55 @@ GdkTexture *
 gdk_texture_new_from_file (GFile   *file,
                            GError **error)
 {
+  GBytes *bytes;
   GdkTexture *texture;
-  GdkPixbuf *pixbuf;
-  GInputStream *stream;
 
   g_return_val_if_fail (G_IS_FILE (file), NULL);
   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
-  stream = G_INPUT_STREAM (g_file_read (file, NULL, error));
-  if (stream == NULL)
+  bytes = g_file_load_bytes (file, NULL, NULL, error);
+  if (bytes == NULL)
     return NULL;
 
+  texture = gdk_texture_new_from_bytes (bytes, error);
+
+  g_bytes_unref (bytes);
+
+  return texture;
+}
+
+
+/**
+ * gdk_texture_new_from_bytes:
+ * @bytes: a `GBytes` containing the data to load
+ * @error: Return location for an error
+ *
+ * Creates a new texture by loading an image from memory,
+ *
+ * The file format is detected automatically. The supported formats
+ * are PNG and JPEG, though more formats might be available.
+ *
+ * If %NULL is returned, then @error will be set.
+ *
+ * Return value: A newly-created `GdkTexture`
+ *
+ * Since: 4.6
+ */
+GdkTexture *
+gdk_texture_new_from_bytes (GBytes  *bytes,
+                            GError **error)
+{
+  GInputStream *stream;
+  GdkPixbuf *pixbuf;
+  GdkTexture *texture;
+
+  g_return_val_if_fail (bytes != NULL, NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  stream = g_memory_input_stream_new_from_bytes (bytes);
   pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, error);
   g_object_unref (stream);
+
   if (pixbuf == NULL)
     return NULL;
 
diff --git a/gdk/gdktexture.h b/gdk/gdktexture.h
index 9e3b7a93fa..7cccdb5928 100644
--- a/gdk/gdktexture.h
+++ b/gdk/gdktexture.h
@@ -49,6 +49,9 @@ GdkTexture *            gdk_texture_new_from_resource          (const char
 GDK_AVAILABLE_IN_ALL
 GdkTexture *            gdk_texture_new_from_file              (GFile           *file,
                                                                 GError         **error);
+GDK_AVAILABLE_IN_4_6
+GdkTexture *            gdk_texture_new_from_bytes             (GBytes          *bytes,
+                                                                GError         **error);
 
 GDK_AVAILABLE_IN_ALL
 int                     gdk_texture_get_width                  (GdkTexture      *texture) G_GNUC_PURE;