Vulkan: Update layer provoking vertex for geometry shaders

src/libANGLE/renderer/vulkan/vk_caps_utils.cpp

@@ -925,7 +925,13 @@ void RendererVk::ensureCapsInitialized() const
             mFeatures.supportsTransformFeedbackExtension.enabled &&
             mFeatures.exposeNonConformantExtensionsAndVersions.enabled;
         mNativeCaps.maxFramebufferLayers = LimitToInt(limitsVk.maxFramebufferLayers);
-        mNativeCaps.layerProvokingVertex = GL_LAST_VERTEX_CONVENTION_EXT;
+
+        // If the provoking vertex feature is enabled, angle specifies to use
+        // the "last" convention in order to match GL behavior. Otherwise, use
+        // "first" as vulkan follows this convention for provoking vertex.
+        mNativeCaps.layerProvokingVertex = (mFeatures.provokingVertex.enabled)
+                                               ? GL_LAST_VERTEX_CONVENTION_EXT
+                                               : GL_FIRST_VERTEX_CONVENTION_EXT;
 
         mNativeCaps.maxGeometryInputComponents =
             LimitToInt(limitsVk.maxGeometryInputComponents) - reservedVaryingVectorCount * 4;

src/tests/deqp_support/deqp_gles31_test_expectations.txt

@@ -183,7 +183,6 @@
 
 // Geometry shader support:
 5430 VULKAN : dEQP-GLES31.functional.geometry_shading.query.primitives_generated_* = FAIL
-5452 VULKAN : dEQP-GLES31.functional.geometry_shading.layered.layer_provoking_vertex_* = FAIL
 
 // Tessellation shader support:
 5557 VULKAN : dEQP-GLES31.functional.tessellation.shader_input_output.gl_position_tcs_to_tes = FAIL