commit 485e4c358b26f09ec0634e63c311131c9507779a
author Alec Mouri <alecmouri@google.com> Tue Apr 30 18:24:05 2019 -0700
committer Alec Mouri <alecmouri@google.com> Mon May 06 17:55:25 2019 -0700
tree 08a623a6f2942a359a5a785290b7f7c4a7e00e70
parent e6f6a7c4d74c967c4ea38f2f6b7c68f9260c952c

Clean-up egl image preallocation

Allocate EGL images in onFrameAvailable, instead of a custom
onBuffersAllocated callback. This way we reduce traffic over binder
while still performing GL work ahead of time in queueBuffer().

Bug: 130567928
Test: systrace
Change-Id: I4070e9ddbd379dac3d809d0e7edb2855fc8b7a80

services/surfaceflinger/BufferLayerConsumer.cpp

diff --git a/services/surfaceflinger/BufferLayerConsumer.cpp b/services/surfaceflinger/BufferLayerConsumer.cpp
index fc98dc8..6709fb4 100644
--- a/services/surfaceflinger/BufferLayerConsumer.cpp
+++ b/services/surfaceflinger/BufferLayerConsumer.cpp
@@ -478,20 +478,15 @@
     }
 }
 
-void BufferLayerConsumer::onBufferAllocated(const BufferItem& item) {
-    if (item.mGraphicBuffer != nullptr) {
-        std::shared_ptr<Image> image = std::make_shared<Image>(item.mGraphicBuffer, mRE);
-        std::shared_ptr<Image> oldImage;
-        {
-            std::lock_guard<std::mutex> lock(mImagesMutex);
-            oldImage = mImages[item.mSlot];
-            if (oldImage == nullptr || oldImage->graphicBuffer() == nullptr ||
-                oldImage->graphicBuffer()->getId() != item.mGraphicBuffer->getId()) {
-                mImages[item.mSlot] = std::make_shared<Image>(item.mGraphicBuffer, mRE);
-            }
-            image = mImages[item.mSlot];
+void BufferLayerConsumer::onBufferAvailable(const BufferItem& item) {
+    if (item.mGraphicBuffer != nullptr && item.mSlot != BufferQueue::INVALID_BUFFER_SLOT) {
+        std::lock_guard<std::mutex> lock(mImagesMutex);
+        const std::shared_ptr<Image>& oldImage = mImages[item.mSlot];
+        if (oldImage == nullptr || oldImage->graphicBuffer() == nullptr ||
+            oldImage->graphicBuffer()->getId() != item.mGraphicBuffer->getId()) {
+            mImages[item.mSlot] = std::make_shared<Image>(item.mGraphicBuffer, mRE);
+            mRE.cacheExternalTextureBuffer(item.mGraphicBuffer);
         }
-        mRE.cacheExternalTextureBuffer(image->graphicBuffer());
     }
 }
 
@@ -533,5 +528,4 @@
         mRE.unbindExternalTextureBuffer(mGraphicBuffer->getId());
     }
 }
-
 }; // namespace android