+/**
+ * This function gives all input attachments at once.
+ *
+ * You MUST release the returned values
+ */
+static inline int filter_GetInputAttachments( filter_t *p_filter,
+ input_attachment_t ***ppp_attachment,
+ int *pi_attachment )
+{
+ if( !p_filter->pf_get_attachments )
+ return VLC_EGENERIC;
+ return p_filter->pf_get_attachments( p_filter,
+ ppp_attachment, pi_attachment );
+}
+
+/**
+ * It creates a blend filter.
+ *
+ * Only the chroma properties of the dest format is used (chroma
+ * type, rgb masks and shifts)
+ */
+VLC_EXPORT( filter_t *, filter_NewBlend, ( vlc_object_t *, const video_format_t *p_dst_chroma ) LIBVLC_USED );
+
+/**
+ * It configures blend filter parameters that are allowed to changed
+ * after the creation.
+ */
+VLC_EXPORT( int, filter_ConfigureBlend, ( filter_t *, int i_dst_width, int i_dst_height, const video_format_t *p_src ) );
+
+/**
+ * It blends a picture into another one.
+ *
+ * The input picture is not modified and not released.
+ */
+VLC_EXPORT( int, filter_Blend, ( filter_t *, picture_t *p_dst, int i_dst_x, int i_dst_y, const picture_t *p_src, int i_alpha ) );
+
+/**
+ * It destroys a blend filter created by filter_NewBlend.
+ */
+VLC_EXPORT( void, filter_DeleteBlend, ( filter_t * ) );