1 files changed, 15 insertions, 0 deletions
diff --git a/include/blt_api.h b/include/blt_api.h
index df7ec8f..5d99839 100755
--- a/include/blt_api.h
+++ b/include/blt_api.h
@@ -466,6 +466,13 @@ enum blt_flag {
      */
     BLT_FLAG_INHERIT_PRIO          = 0x2000,
     /**
+     * @brief Indicate that a background buffer for blend operation is supplied.
+     *
+     * B2R2_BLT_FLAG_PER_PIXEL_ALPHA_BLEND, B2R2_BLT_FLAG_SRC_IS_NOT_PREMULT, and
+     * B2R2_BLT_FLAG_GLOBAL_ALPHA_BLEND will control the blend operation.
+     */
+    BLT_FLAG_BG_BLEND              = 0x20000,
+    /**
      * @brief Use color look-up table for color correction.
      * Pointer to the table must be specified in *clut field of
      * the b2r2_blt_req structure.
@@ -540,6 +547,14 @@ struct blt_req {
      */
     uint32_t              src_color;
     /**
+     * @brief Background image.
+     */
+    struct blt_img        bg_img;
+    /**
+     * @brief Background area to be blitted.
+     */
+    struct blt_rect       bg_rect;
+    /**
      * @brief Destination image.
      */
     struct blt_img        dst_img;