Cache NATIVE_WINDOW_MAX_BUFFER_COUNT in Surface

To avoid the sync binder call to BufferQueue everytime
vkGetPhysicalDeviceSurfaceCapabilitiesKHR is called, we cache the
NATIVE_WINDOW_MAX_BUFFER_COUNT at the Surface each time the client
connects.

Bug: 133187007
Test: Vulkan cts tests
Change-Id: I1942ff75ceb539c4904dc98c2e488c4d4cade31d

1 files changed, 6 insertions, 0 deletions

diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index e6eb327c6f..2e8a5d005b 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -96,6 +96,7 @@ Surface::Surface(const sp<IGraphicBufferProducer>& bufferProducer, bool controll
     mConnectedToCpu = false;
     mProducerControlledByApp = controlledByApp;
     mSwapIntervalZero = false;
+    mMaxBufferCount = 0;
 }
 
 Surface::~Surface() {
@@ -961,6 +962,10 @@ int Surface::query(int what, int* value) const {
                 *value = static_cast<int>(mDataSpace);
                 return NO_ERROR;
             }
+            case NATIVE_WINDOW_MAX_BUFFER_COUNT: {
+                *value = mMaxBufferCount;
+                return NO_ERROR;
+            }
         }
     }
     return mGraphicBufferProducer->query(what, value);
@@ -1298,6 +1303,7 @@ int Surface::connect(
         mDefaultWidth = output.width;
         mDefaultHeight = output.height;
         mNextFrameNumber = output.nextFrameNumber;
+        mMaxBufferCount = output.maxBufferCount;
 
         // Ignore transform hint if sticky transform is set or transform to display inverse flag is
         // set. Transform hint should be ignored if the client is expected to always submit buffers