Add an accessor for GdkImage->mem

See bug # 522756
(cherry picked from commit 53796b7f1f)

docs/reference/gdk/gdk-sections.txt

@@ -292,6 +292,16 @@ gdk_image_unref
 gdk_image_destroy
 gdk_image_get_colormap
 gdk_image_set_colormap
+gdk_image_get_bits_per_pixel
+gdk_image_get_bytes_per_pixel
+gdk_image_get_bytes_per_line
+gdk_image_get_byte_order
+gdk_image_get_depth
+gdk_image_get_height
+gdk_image_get_image_type
+gdk_image_get_visual
+gdk_image_get_width
+gdk_image_get_pixels
 
 <SUBSECTION>
 gdk_image_put_pixel

gdk/gdk.symbols

@@ -839,6 +839,7 @@ gdk_image_ref
 gdk_image_unref
 gdk_image_get
 #endif
+gdk_image_get_pixels
 gdk_image_set_colormap
 gdk_image_get_colormap
 gdk_image_new

gdk/gdkimage.c

@@ -308,6 +308,24 @@ gdk_image_get_bits_per_pixel (GdkImage *image)
   return image->bits_per_pixel;
 }
 
+/**
+ * gdk_image_get_pixels:
+ * @image: a #GdkImage
+ *
+ * Returns a pointer to the pixel data of the image.
+ *
+ * Returns: the pixel data of the image
+ *
+ * Since: 2.22
+ */
+gpointer
+gdk_image_get_pixels (GdkImage *image)
+{
+  g_return_val_if_fail (GDK_IS_IMAGE (image), NULL);
+
+  return image->mem;
+}
+
 /* We have N_REGION GDK_SCRATCH_IMAGE_WIDTH x GDK_SCRATCH_IMAGE_HEIGHT regions divided
  * up between n_images different images. possible_n_images gives
  * various divisors of N_REGIONS. The reason for allowing this

gdk/gdkimage.h

@@ -129,6 +129,7 @@ guint16       gdk_image_get_depth          (GdkImage *image);
 guint16       gdk_image_get_bytes_per_pixel(GdkImage *image);
 guint16       gdk_image_get_bytes_per_line (GdkImage *image);
 guint16       gdk_image_get_bits_per_pixel (GdkImage *image);
+gpointer      gdk_image_get_pixels         (GdkImage *image);
 
 #ifdef GDK_ENABLE_BROKEN
 GdkImage* gdk_image_new_bitmap (GdkVisual     *visual,