Vulkan: Enable robust buffer access.

src/libANGLE/renderer/vulkan/RendererVk.cpp

@@ -843,6 +843,7 @@ angle::Result RendererVk::initializeDevice(DisplayVk *displayVk, uint32_t queueF
     // Select additional features to be enabled
     VkPhysicalDeviceFeatures enabledFeatures = {};
     enabledFeatures.inheritedQueries         = mPhysicalDeviceFeatures.inheritedQueries;
+    enabledFeatures.robustBufferAccess       = mPhysicalDeviceFeatures.robustBufferAccess;
 
     VkDeviceQueueCreateInfo queueCreateInfo = {};
 

src/libANGLE/renderer/vulkan/VertexArrayVk.cpp

@@ -450,11 +450,23 @@ angle::Result VertexArrayVk::syncDirtyAttrib(ContextVk *contextVk,
             }
             else
             {
+                if (bufferVk->getSize() == 0)
+                {
+                    mCurrentArrayBuffers[attribIndex] = nullptr;
+                    mCurrentArrayBufferHandles[attribIndex] =
+                        mTheNullBuffer.getBuffer().getHandle();
+                    mCurrentArrayBufferOffsets[attribIndex] = 0;
+                    mCurrentArrayBufferStrides[attribIndex] = 0;
+                }
+                else
+                {
                     mCurrentArrayBuffers[attribIndex] = &bufferVk->getBuffer();
                     mCurrentArrayBufferHandles[attribIndex] =
                         bufferVk->getBuffer().getBuffer().getHandle();
                     mCurrentArrayBufferOffsets[attribIndex] = binding.getOffset();
                     mCurrentArrayBufferStrides[attribIndex] = binding.getStride();
+                }
+
                 ensureConversionReleased(renderer, attribIndex);
             }
         }

src/libANGLE/renderer/vulkan/vk_caps_utils.cpp

@@ -50,6 +50,9 @@ void GenerateCaps(const VkPhysicalDeviceProperties &physicalDeviceProperties,
     outExtensions->textureBorderClamp     = false;  // not implemented yet
     outExtensions->translatedShaderSource = true;
 
+    // Only expose robust buffer access if the physical device supports it.
+    outExtensions->robustBufferAccessBehavior = physicalDeviceFeatures.robustBufferAccess;
+
     // We use secondary command buffers almost everywhere and they require a feature to be
     // able to execute in the presence of queries.  As a result, we won't support queries
     // unless that feature is available.