From 671dfefc1e3fff5038a6d9cedc78daabffa5597f Mon Sep 17 00:00:00 2001
From: Asheem Mamoowala <asheem.mamoowala@mapbox.com>
Date: Mon, 5 Feb 2018 19:31:03 -0500
Subject: Reset tileset-based render sources when any tileset properties
 changed. (#11042)

---
 src/mbgl/renderer/sources/render_raster_dem_source.cpp | 15 ++++++++-------
 src/mbgl/renderer/sources/render_raster_dem_source.hpp |  2 +-
 src/mbgl/renderer/sources/render_raster_source.cpp     | 15 ++++++++-------
 src/mbgl/renderer/sources/render_raster_source.hpp     |  2 +-
 src/mbgl/renderer/sources/render_vector_source.cpp     | 15 ++++++++-------
 src/mbgl/renderer/sources/render_vector_source.hpp     |  2 +-
 6 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/src/mbgl/renderer/sources/render_raster_dem_source.cpp b/src/mbgl/renderer/sources/render_raster_dem_source.cpp
index 76716518d7..4de949c9f2 100644
--- a/src/mbgl/renderer/sources/render_raster_dem_source.cpp
+++ b/src/mbgl/renderer/sources/render_raster_dem_source.cpp
@@ -32,14 +32,10 @@ void RenderRasterDEMSource::update(Immutable<style::Source::Impl> baseImpl_,
 
     enabled = needsRendering;
 
-    optional<Tileset> tileset = impl().getTileset();
+    optional<Tileset> _tileset = impl().getTileset();
 
-    if (!tileset) {
-        return;
-    }
-
-    if (tileURLTemplates != tileset->tiles) {
-        tileURLTemplates = tileset->tiles;
+    if (tileset != _tileset) {
+        tileset = _tileset;
 
         // TODO: this removes existing buckets, and will cause flickering.
         // Should instead refresh tile data in place.
@@ -47,6 +43,11 @@ void RenderRasterDEMSource::update(Immutable<style::Source::Impl> baseImpl_,
         tilePyramid.renderTiles.clear();
         tilePyramid.cache.clear();
     }
+    // Allow clearing the tile pyramid first, before the early return in case
+    //  the new tileset is not yet available or has an error in loading
+    if (!_tileset) {
+        return;
+    }
 
     tilePyramid.update(layers,
                        needsRendering,
diff --git a/src/mbgl/renderer/sources/render_raster_dem_source.hpp b/src/mbgl/renderer/sources/render_raster_dem_source.hpp
index b6b8bf977c..87f9bcb563 100644
--- a/src/mbgl/renderer/sources/render_raster_dem_source.hpp
+++ b/src/mbgl/renderer/sources/render_raster_dem_source.hpp
@@ -40,7 +40,7 @@ private:
     const style::RasterSource::Impl& impl() const;
 
     TilePyramid tilePyramid;
-    optional<std::vector<std::string>> tileURLTemplates;
+    optional<Tileset> tileset;
 
 protected:
     void onTileChanged(Tile&) final;
diff --git a/src/mbgl/renderer/sources/render_raster_source.cpp b/src/mbgl/renderer/sources/render_raster_source.cpp
index e99cd040e9..5d32818663 100644
--- a/src/mbgl/renderer/sources/render_raster_source.cpp
+++ b/src/mbgl/renderer/sources/render_raster_source.cpp
@@ -29,14 +29,10 @@ void RenderRasterSource::update(Immutable<style::Source::Impl> baseImpl_,
 
     enabled = needsRendering;
 
-    optional<Tileset> tileset = impl().getTileset();
+    optional<Tileset> _tileset = impl().getTileset();
 
-    if (!tileset) {
-        return;
-    }
-
-    if (tileURLTemplates != tileset->tiles) {
-        tileURLTemplates = tileset->tiles;
+    if (tileset != _tileset) {
+        tileset = _tileset;
 
         // TODO: this removes existing buckets, and will cause flickering.
         // Should instead refresh tile data in place.
@@ -44,6 +40,11 @@ void RenderRasterSource::update(Immutable<style::Source::Impl> baseImpl_,
         tilePyramid.renderTiles.clear();
         tilePyramid.cache.clear();
     }
+    // Allow clearing the tile pyramid first, before the early return in case
+    //  the new tileset is not yet available or has an error in loading
+    if (!_tileset) {
+        return;
+    }
 
     tilePyramid.update(layers,
                        needsRendering,
diff --git a/src/mbgl/renderer/sources/render_raster_source.hpp b/src/mbgl/renderer/sources/render_raster_source.hpp
index 25041fde43..bc6ac1bd9f 100644
--- a/src/mbgl/renderer/sources/render_raster_source.hpp
+++ b/src/mbgl/renderer/sources/render_raster_source.hpp
@@ -40,7 +40,7 @@ private:
     const style::RasterSource::Impl& impl() const;
 
     TilePyramid tilePyramid;
-    optional<std::vector<std::string>> tileURLTemplates;
+    optional<Tileset> tileset;
 };
 
 template <>
diff --git a/src/mbgl/renderer/sources/render_vector_source.cpp b/src/mbgl/renderer/sources/render_vector_source.cpp
index d53023e4d0..c01257aea9 100644
--- a/src/mbgl/renderer/sources/render_vector_source.cpp
+++ b/src/mbgl/renderer/sources/render_vector_source.cpp
@@ -32,14 +32,10 @@ void RenderVectorSource::update(Immutable<style::Source::Impl> baseImpl_,
 
     enabled = needsRendering;
 
-    optional<Tileset> tileset = impl().getTileset();
+    optional<Tileset> _tileset = impl().getTileset();
 
-    if (!tileset) {
-        return;
-    }
-
-    if (tileURLTemplates != tileset->tiles) {
-        tileURLTemplates = tileset->tiles;
+    if (tileset != _tileset) {
+        tileset = _tileset;
 
         // TODO: this removes existing buckets, and will cause flickering.
         // Should instead refresh tile data in place.
@@ -47,6 +43,11 @@ void RenderVectorSource::update(Immutable<style::Source::Impl> baseImpl_,
         tilePyramid.renderTiles.clear();
         tilePyramid.cache.clear();
     }
+    // Allow clearing the tile pyramid first, before the early return in case
+    //  the new tileset is not yet available or has an error in loading
+    if (!_tileset) {
+        return;
+    }
 
     tilePyramid.update(layers,
                        needsRendering,
diff --git a/src/mbgl/renderer/sources/render_vector_source.hpp b/src/mbgl/renderer/sources/render_vector_source.hpp
index 4a992e854f..57fe6dbb6c 100644
--- a/src/mbgl/renderer/sources/render_vector_source.hpp
+++ b/src/mbgl/renderer/sources/render_vector_source.hpp
@@ -40,7 +40,7 @@ private:
     const style::VectorSource::Impl& impl() const;
 
     TilePyramid tilePyramid;
-    optional<std::vector<std::string>> tileURLTemplates;
+    optional<Tileset> tileset;
 };
 
 template <>
-- 
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