From b0ae792954a1d0a17fe36ffac8f0d5cd522aa858 Mon Sep 17 00:00:00 2001
From: Corentin Wallez <cwallez@chromium.org>
Date: Fri, 2 Feb 2018 17:11:34 -0500
Subject: [PATCH] Vulkan: Don't implicitly transition texture already in output
 attachment

---
 src/backend/vulkan/CommandBufferVk.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend/vulkan/CommandBufferVk.cpp b/src/backend/vulkan/CommandBufferVk.cpp
index a4be2a9235..449ed2d30a 100644
--- a/src/backend/vulkan/CommandBufferVk.cpp
+++ b/src/backend/vulkan/CommandBufferVk.cpp
@@ -127,6 +127,11 @@ namespace backend { namespace vulkan {
                     for (uint32_t i = 0; i < renderPass->GetAttachmentCount(); ++i) {
                         Texture* attachment =
                             ToBackend(framebuffer->GetTextureView(i)->GetTexture());
+
+                        if (attachment->GetUsage() & nxt::TextureUsageBit::OutputAttachment) {
+                            continue;
+                        }
+
                         attachment->RecordBarrier(commands, attachment->GetUsage(),
                                                   nxt::TextureUsageBit::OutputAttachment);
                         attachment->UpdateUsageInternal(nxt::TextureUsageBit::OutputAttachment);