From b43e1ae12328e8a36a9a36c03e49e1db0a395189 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Wed, 19 Jul 2017 17:59:50 -0700
Subject: [core] Correctly track sprite loaded state through smart setStyle

---
 mapbox-gl-js                         |  2 +-
 src/mbgl/renderer/image_manager.cpp  | 21 ++++++++++++++++-----
 src/mbgl/renderer/image_manager.hpp  |  7 ++-----
 src/mbgl/renderer/render_style.cpp   |  4 +---
 src/mbgl/style/style_impl.cpp        |  1 +
 test/renderer/image_manager.test.cpp |  2 +-
 6 files changed, 22 insertions(+), 15 deletions(-)

diff --git a/mapbox-gl-js b/mapbox-gl-js
index f27666813d..31444a72c2 160000
--- a/mapbox-gl-js
+++ b/mapbox-gl-js
@@ -1 +1 @@
-Subproject commit f27666813dd8e3d738a3962b3d86d0ec799b6fc7
+Subproject commit 31444a72c2dafdd7dba99dc3bf5428c155e07cf4
diff --git a/src/mbgl/renderer/image_manager.cpp b/src/mbgl/renderer/image_manager.cpp
index d0a106ede6..692747bca4 100644
--- a/src/mbgl/renderer/image_manager.cpp
+++ b/src/mbgl/renderer/image_manager.cpp
@@ -4,12 +4,23 @@
 
 namespace mbgl {
 
-void ImageManager::onSpriteLoaded() {
-    loaded = true;
-    for (const auto& entry : requestors) {
-        notify(*entry.first, entry.second);
+void ImageManager::setLoaded(bool loaded_) {
+    if (loaded == loaded_) {
+        return;
     }
-    requestors.clear();
+
+    loaded = loaded_;
+
+    if (loaded) {
+        for (const auto& entry : requestors) {
+            notify(*entry.first, entry.second);
+        }
+        requestors.clear();
+    }
+}
+
+bool ImageManager::isLoaded() const {
+    return loaded;
 }
 
 void ImageManager::addImage(Immutable<style::Image::Impl> image_) {
diff --git a/src/mbgl/renderer/image_manager.hpp b/src/mbgl/renderer/image_manager.hpp
index 9a9a4ce997..1c9d67f47d 100644
--- a/src/mbgl/renderer/image_manager.hpp
+++ b/src/mbgl/renderer/image_manager.hpp
@@ -39,11 +39,8 @@ public:
     ImageManager();
     ~ImageManager();
 
-    void onSpriteLoaded();
-
-    bool isLoaded() const {
-        return loaded;
-    }
+    void setLoaded(bool);
+    bool isLoaded() const;
 
     void dumpDebugLogs() const;
 
diff --git a/src/mbgl/renderer/render_style.cpp b/src/mbgl/renderer/render_style.cpp
index 2bf903fe5f..3d95b12bc4 100644
--- a/src/mbgl/renderer/render_style.cpp
+++ b/src/mbgl/renderer/render_style.cpp
@@ -143,9 +143,7 @@ void RenderStyle::update(const UpdateParameters& parameters) {
         imageManager->updateImage(entry.second.after);
     }
 
-    if (parameters.spriteLoaded && !imageManager->isLoaded()) {
-        imageManager->onSpriteLoaded();
-    }
+    imageManager->setLoaded(parameters.spriteLoaded);
 
 
     const LayerDifference layerDiff = diffLayers(layerImpls, parameters.layers);
diff --git a/src/mbgl/style/style_impl.cpp b/src/mbgl/style/style_impl.cpp
index 2d42afd086..9cc2588ca7 100644
--- a/src/mbgl/style/style_impl.cpp
+++ b/src/mbgl/style/style_impl.cpp
@@ -111,6 +111,7 @@ void Style::Impl::parse(const std::string& json_) {
     defaultPitch = parser.pitch;
     setLight(std::make_unique<Light>(parser.light));
 
+    spriteLoaded = false;
     spriteLoader->load(parser.spriteURL, scheduler, fileSource);
     glyphURL = parser.glyphURL;
 
diff --git a/test/renderer/image_manager.test.cpp b/test/renderer/image_manager.test.cpp
index 203e05d492..5e6da5c005 100644
--- a/test/renderer/image_manager.test.cpp
+++ b/test/renderer/image_manager.test.cpp
@@ -127,7 +127,7 @@ TEST(ImageManager, NotifiesRequestorWhenSpriteIsLoaded) {
     imageManager.getImages(requestor, {"one"});
     ASSERT_FALSE(notified);
 
-    imageManager.onSpriteLoaded();
+    imageManager.setLoaded(true);
     ASSERT_TRUE(notified);
 }
 
-- 
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