From 94d724071d7479f5d9a07952924b91a5ef8e2028 Mon Sep 17 00:00:00 2001
From: Ricardo Cerqueira <cyanogenmod@cerqueira.org>
Date: Sat, 24 Nov 2012 23:11:49 +0000
Subject: [PATCH] surfaceflinger: Reimplement hwrotation

Change-Id: Ia26bb36b5b6de132af49c272c4472ad2703afbda
---
 services/surfaceflinger/DisplayDevice.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index baff5ba59..8946c413a 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -392,6 +392,20 @@ status_t DisplayDevice::orientationToTransfrom(
         int orientation, int w, int h, Transform* tr)
 {
     uint32_t flags = 0;
+    char value[PROPERTY_VALUE_MAX];
+    property_get("ro.sf.hwrotation", value, "0");
+    int additionalRot = atoi(value);
+
+    if (additionalRot) {
+        additionalRot /= 90;
+        if (orientation == DisplayState::eOrientationUnchanged) {
+            orientation = additionalRot;
+        } else {
+            orientation += additionalRot;
+            orientation %= 4;
+        }
+    }
+
     switch (orientation) {
     case DisplayState::eOrientationDefault:
         flags = Transform::ROT_0;