surfaceflinger: Reimplement hwrotation

Change-Id: Ia26bb36b5b6de132af49c272c4472ad2703afbda

1 files changed, 15 insertions, 0 deletions

diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index ce98b67..c56645f 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -343,6 +343,20 @@ 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;
@@ -359,6 +373,7 @@ status_t DisplayDevice::orientationToTransfrom(
     default:
         return BAD_VALUE;
     }
+
     tr->set(flags, w, h);
     return NO_ERROR;
 }