commit 03d1a5ed6cc8ba6a32ffc6fb6d67a3c2da05a6d1
author Jamie Madill <jmadill@chromium.org> Mon Nov 12 11:34:24 2018 -0500
committer Commit Bot <commit-bot@chromium.org> Mon Nov 12 17:32:27 2018 +0000
tree 5e77ec1158589776eb83ca2d2ca49da31668d2cf
parent 48f63f90f6f325d0454b00ec2ae553adc508c159

Vulkan: Use global buffer barriers.

This switches from using resource barriers for buffers to using global
barriers. This matches the general advised best practice. It also
allows us to combine multiple barriers into one. On a draw we might
combine all the vertex and index barriers into a single barrier call.

We implement this using a bit of extra state tracking in BufferHelper.

Bug: angleproject:2828
Change-Id: I196b368804ff50e60d085687a643e5566ba1c5b6
Reviewed-on: https://chromium-review.googlesource.com/c/1309977
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

src/libANGLE/renderer/vulkan/ContextVk.cpp

diff --git a/src/libANGLE/renderer/vulkan/ContextVk.cpp b/src/libANGLE/renderer/vulkan/ContextVk.cpp
index 2a3fd8d..08a70e6 100644
--- a/src/libANGLE/renderer/vulkan/ContextVk.cpp
+++ b/src/libANGLE/renderer/vulkan/ContextVk.cpp
@@ -428,14 +428,19 @@
         mProgram->getState().getMaxActiveAttribLocation(),
         mVertexArray->getCurrentArrayBufferHandles(), mVertexArray->getCurrentArrayBufferOffsets());
 
-    const auto &arrayBufferResources = mVertexArray->getCurrentArrayBufferResources();
+    const auto &arrayBufferResources = mVertexArray->getCurrentArrayBuffers();
+
+    vk::FramebufferHelper *framebuffer = mDrawFramebuffer->getFramebuffer();
 
     for (size_t attribIndex : context->getStateCache().getActiveBufferedAttribsMask())
     {
-        if (arrayBufferResources[attribIndex])
-            arrayBufferResources[attribIndex]->addReadDependency(
-                mDrawFramebuffer->getFramebuffer());
+        vk::BufferHelper *arrayBuffer = arrayBufferResources[attribIndex];
+        if (arrayBuffer)
+        {
+            arrayBuffer->onFramebufferRead(framebuffer, VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT);
+        }
     }
+
     return angle::Result::Continue();
 }
 
@@ -446,11 +451,11 @@
                                    mVertexArray->getCurrentElementArrayBufferOffset(),
                                    gl_vk::GetIndexType(mCurrentDrawElementsType));
 
-    vk::RecordableGraphResource *elementArrayBufferResource =
-        mVertexArray->getCurrentElementArrayBufferResource();
-    if (elementArrayBufferResource)
+    vk::BufferHelper *elementArrayBuffer = mVertexArray->getCurrentElementArrayBuffer();
+    if (elementArrayBuffer)
     {
-        elementArrayBufferResource->addReadDependency(mDrawFramebuffer->getFramebuffer());
+        vk::FramebufferHelper *framebuffer = mDrawFramebuffer->getFramebuffer();
+        elementArrayBuffer->onFramebufferRead(framebuffer, VK_ACCESS_INDEX_READ_BIT);
     }
     return angle::Result::Continue();
 }