From 8904b7a6485aeaf633f28a1c5f7bea9b776f025a Mon Sep 17 00:00:00 2001
From: Saurabh Shah <saurshah@codeaurora.org>
Date: Mon, 20 Aug 2012 15:25:28 -0700
Subject: [PATCH] hwc/overlay: Add premultiplied alpha support.

Add premultiplied alpha support to video and mdp comp features.

Change-Id: Ieddaf82d5cc43c455bd1c10dbc82b0fc016903ea
---
 libhwcomposer/hwc_mdpcomp.cpp | 11 +++++++----
 libhwcomposer/hwc_video.cpp   |  4 ++++
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/libhwcomposer/hwc_mdpcomp.cpp b/libhwcomposer/hwc_mdpcomp.cpp
index 3c4bd1a..8bb6257 100644
--- a/libhwcomposer/hwc_mdpcomp.cpp
+++ b/libhwcomposer/hwc_mdpcomp.cpp
@@ -294,12 +294,15 @@ int MDPComp::prepare(hwc_context_t *ctx, hwc_layer_t *layer,
         ovutils::Whf info(hnd->width, hnd->height, hnd->format, hnd->size);
         ovutils::eMdpFlags mdpFlags = mdp_info.isVG ? ovutils::OV_MDP_PIPE_SHARE
                                                    : ovutils::OV_MDP_FLAGS_NONE;
-        ovutils::eIsFg isFG = mdp_info.isFG ? ovutils::IS_FG_SET
-                                                           : ovutils::IS_FG_OFF;
         ovutils::setMdpFlags(mdpFlags, ovutils::OV_MDP_BACKEND_COMPOSITION);
-        if (layer->blending == HWC_BLENDING_PREMULT) {
-            ovutils::setMdpFlags(mdpFlags, ovutils::OV_MDP_BLEND_FG_PREMULT);
+        ovutils::eIsFg isFG = mdp_info.isFG ? ovutils::IS_FG_SET
+                                                    : ovutils::IS_FG_OFF;
+
+        if(layer->blending == HWC_BLENDING_PREMULT) {
+            ovutils::setMdpFlags(mdpFlags,
+                    ovutils::OV_MDP_BLEND_FG_PREMULT);
         }
+
         ovutils::PipeArgs parg(mdpFlags,
                                info,
                                zOrder,
diff --git a/libhwcomposer/hwc_video.cpp b/libhwcomposer/hwc_video.cpp
index 2dcb0cf..78784cf 100644
--- a/libhwcomposer/hwc_video.cpp
+++ b/libhwcomposer/hwc_video.cpp
@@ -115,6 +115,10 @@ bool configPrimVid(hwc_context_t *ctx, hwc_layer_t *layer) {
         ovutils::setMdpFlags(mdpFlags,
                 ovutils::OV_MDP_SECURE_OVERLAY_SESSION);
     }
+    if(layer->blending == HWC_BLENDING_PREMULT) {
+        ovutils::setMdpFlags(mdpFlags,
+                ovutils::OV_MDP_BLEND_FG_PREMULT);
+    }
 
     ovutils::eIsFg isFgFlag = ovutils::IS_FG_OFF;
     if (ctx->numHwLayers == 1) {