1 files changed, 10 insertions, 19 deletions

diff --git a/libs/ui/Surface.cpp b/libs/ui/Surface.cpp
index c3fbea2..64522fb 100644
--- a/libs/ui/Surface.cpp
+++ b/libs/ui/Surface.cpp
@@ -361,7 +361,6 @@ void Surface::init()
     const_cast<uint32_t&>(android_native_window_t::flags) = 0;
     // be default we request a hardware surface
     mUsage = GRALLOC_USAGE_HW_RENDER;
-    mUsageChanged = true;
     mNeedFullUpdate = false;
 }
 
@@ -498,14 +497,14 @@ int Surface::dequeueBuffer(android_native_buffer_t** buffer)
         LOGE("error dequeuing a buffer (%s)", strerror(bufIdx));
         return bufIdx;
     }
-    
-    // FIXME: in case of failure below, we need to undo the dequeue
-    
-    uint32_t usage;
-    const bool usageChanged = getUsage(&usage);
+
+    // below we make sure we AT LEAST have the usage flags we want
+    const uint32_t usage(getUsage());
     const sp<SurfaceBuffer>& backBuffer(mBuffers[bufIdx]);
-    if ((backBuffer == 0) || usageChanged || 
-            mSharedBufferClient->needNewBuffer(bufIdx)) {
+    if (backBuffer == 0 || 
+        ((uint32_t(backBuffer->usage) & usage) != usage) ||
+        mSharedBufferClient->needNewBuffer(bufIdx)) 
+    {
         err = getBufferLocked(bufIdx, usage);
         LOGE_IF(err, "getBufferLocked(%ld, %08x) failed (%s)",
                 bufIdx, usage, strerror(-err));
@@ -600,21 +599,13 @@ int Surface::perform(int operation, va_list args)
 void Surface::setUsage(uint32_t reqUsage)
 {
     Mutex::Autolock _l(mSurfaceLock);
-    if (mUsage != reqUsage) {
-        mUsageChanged = true;
-        mUsage = reqUsage;
-    }
+    mUsage = reqUsage;
 }
 
-bool Surface::getUsage(uint32_t* usage)
+uint32_t Surface::getUsage() const
 {
     Mutex::Autolock _l(mSurfaceLock);
-    *usage = mUsage;
-    if (mUsageChanged) {
-        mUsageChanged = false;
-        return true;
-    }
-    return false;
+    return mUsage;
 }
 
 // ----------------------------------------------------------------------------