fix [2946787] Screen flicker on low resolution setting in camcorder.

Change-Id: I7e86f2b6d85dcae8dd212890b978fa6ac7de6893

1 files changed, 21 insertions, 11 deletions

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 03d7a02..695cbfa 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -162,9 +162,13 @@ status_t Layer::setBuffers( uint32_t w, uint32_t h,
     const uint32_t hwFlags = hw.getFlags();
     
     mFormat = format;
-    mReqFormat = format;
     mWidth  = w;
     mHeight = h;
+
+    mReqFormat = format;
+    mReqWidth = w;
+    mReqHeight = h;
+
     mSecure = (flags & ISurfaceComposer::eSecure) ? true : false;
     mNeedsBlending = (info.h_alpha - info.l_alpha) > 0;
 
@@ -304,16 +308,22 @@ sp<GraphicBuffer> Layer::requestBuffer(int index,
     uint32_t w, h, f;
     { // scope for the lock
         Mutex::Autolock _l(mLock);
-        const bool fixedSizeChanged = mFixedSize != (reqWidth && reqHeight);
-        const bool formatChanged    = mReqFormat != reqFormat;
-        mReqWidth  = reqWidth;
-        mReqHeight = reqHeight;
-        mReqFormat = reqFormat;
-        mFixedSize = reqWidth && reqHeight;
-        w = reqWidth  ? reqWidth  : mWidth;
-        h = reqHeight ? reqHeight : mHeight;
-        f = reqFormat ? reqFormat : mFormat;
-        if (fixedSizeChanged || formatChanged) {
+
+        // zero means default
+        if (!reqFormat) reqFormat = mFormat;
+        if (!reqWidth)  reqWidth = mWidth;
+        if (!reqHeight) reqHeight = mHeight;
+
+        w = reqWidth;
+        h = reqHeight;
+        f = reqFormat;
+
+        if ((reqWidth != mReqWidth) || (reqHeight != mReqHeight) ||
+                (reqFormat != mReqFormat)) {
+            mReqWidth  = reqWidth;
+            mReqHeight = reqHeight;
+            mReqFormat = reqFormat;
+
             lcblk->reallocateAllExcept(index);
         }
     }