From 3b92725de146eb02ed0ae115b95486207ba63b95 Mon Sep 17 00:00:00 2001
From: "Thiago Marcos P. Santos" <thiago@mapbox.com>
Date: Tue, 12 May 2015 19:46:48 +0300
Subject: [PATCH] Stop processing SymbolBuckets at the first incomplete bucket

In order to calculate the collision correctly, the layer ordering
matters. Because of that, when we find the first incomplete symbol
bucket, we stop processing any furter SymbolBucket.

The side effect of this change is, if the first SymbolBucket is the
last to receive its resources, we won't see any label at all on
the screen until the last moment, when everything will be draw at
once.
---
 src/mbgl/map/tile_parser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mbgl/map/tile_parser.cpp b/src/mbgl/map/tile_parser.cpp
index 86517da42..388950491 100644
--- a/src/mbgl/map/tile_parser.cpp
+++ b/src/mbgl/map/tile_parser.cpp
@@ -118,6 +118,10 @@ std::unique_ptr<Bucket> TileParser::createBucket(const StyleBucket &bucketDesc)
         } else if (bucketDesc.type == StyleLayerType::Line) {
             return createLineBucket(*layer, bucketDesc);
         } else if (bucketDesc.type == StyleLayerType::Symbol) {
+            if (partialParse) {
+                return nullptr;
+            }
+
             bool needsResources = false;
             auto symbolBucket = createSymbolBucket(*layer, bucketDesc, needsResources);
             if (needsResources) {