Add background blend support

Change API struct to correspond to kernel b2r2 driver updates.
Instead of blending only on the destination there is now
a possibility to blend on a supplied background using standard
blending flags. The background blending option is enabled through
setting a flag in the request. The destination blending will in
this case be entirely omitted and the destination buffer is
overwritten with the result of the source and background blend
operation.

ST-Ericsson Linux next: NA
Depends-On: Ifeb8eb66c2fed97c541b09715a17251a81e493ab
ST-Ericsson ID: 350337
ST-Ericsson FOSS-OUT ID: Trivial

Introduce non-backward compatible changes to exposed interfaces
Signed-off-by: Jörgen Nilsson <jorgen.nilsson@stericsson.com>

Change-Id: Ia34f98cfb20e2f0486049e82581dcea28b465ed4
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/34025
Tested-by: Jorgen NILSSON <jorgen.nilsson@stericsson.com>
Reviewed-by: Jimmy RUBIN <jimmy.rubin@stericsson.com>
Reviewed-by: QATOOLS
Reviewed-by: Robert LIND <robert.lind@stericsson.com>

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;