commit c19459ab7d3f30c87a403aee6aadb483968c82ec
author David Reveman <david@reveman.com> Thu May 28 22:43:40 2020 -0400
committer GitHub <noreply@github.com> Thu May 28 22:43:40 2020 -0400
tree 10d8d7e13bf2525a6817d52f6a9bff0a6c39d500
parent efe3f4569a6aa49935ffb9a688812f46a2971b89

[fuchsia] Avoid unnecessary layout transition. (#18653)

See https://github.com/KhronosGroup/Vulkan-Samples/blob/master/samples/performance/layout_transitions/layout_transitions_tutorial.md#transaction-elimination-on-mali-gpus
for an explanation of why transitioning the layout hurts performance
on Mali drivers.

Co-authored-by: David Reveman <reveman@google.com>

shell/platform/fuchsia/flutter/vulkan_surface_producer.cc

diff --git a/shell/platform/fuchsia/flutter/vulkan_surface_producer.cc b/shell/platform/fuchsia/flutter/vulkan_surface_producer.cc
index 38479f1..08dee01 100644
--- a/shell/platform/fuchsia/flutter/vulkan_surface_producer.cc
+++ b/shell/platform/fuchsia/flutter/vulkan_surface_producer.cc
@@ -214,7 +214,7 @@
         .srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
         .dstAccessMask = 0,
         .oldLayout = imageInfo.fImageLayout,
-        .newLayout = VK_IMAGE_LAYOUT_GENERAL,
+        .newLayout = imageInfo.fImageLayout,
         .srcQueueFamilyIndex = 0,
         .dstQueueFamilyIndex = VK_QUEUE_FAMILY_EXTERNAL_KHR,
         .image = vk_surface->GetVkImage(),