From 4c1f325bf620439fb9a605967241609ada253e91 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Minh=20Nguy=E1=BB=85n?= <mxn@1ec5.org>
Date: Tue, 7 Jul 2015 12:14:26 -0700
Subject: [PATCH] =?UTF-8?q?Moved=20raster=20zoom=20threshold=20to=20the=20?=
 =?UTF-8?q?.5=E2=80=99s?=
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Fixes #963.
---
 src/mbgl/map/source.cpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/mbgl/map/source.cpp b/src/mbgl/map/source.cpp
index d732292e0..7532bd8f9 100644
--- a/src/mbgl/map/source.cpp
+++ b/src/mbgl/map/source.cpp
@@ -316,7 +316,13 @@ double Source::getZoom(const TransformState& state) const {
 }
 
 int32_t Source::coveringZoomLevel(const TransformState& state) const {
-    return std::floor(getZoom(state));
+    double zoom = getZoom(state);
+    if (info.type == SourceType::Raster || info.type == SourceType::Video) {
+        zoom = std::round(zoom);
+    } else {
+        zoom = std::floor(zoom);
+    }
+    return zoom;
 }
 
 std::forward_list<TileID> Source::coveringTiles(const TransformState& state) const {
@@ -405,7 +411,12 @@ bool Source::update(MapData& data,
         return allTilesUpdated;
     }
 
-    int32_t zoom = std::floor(getZoom(transformState));
+    double zoom = getZoom(transformState);
+    if (info.type == SourceType::Raster || info.type == SourceType::Video) {
+        zoom = std::round(zoom);
+    } else {
+        zoom = std::floor(zoom);
+    }
     std::forward_list<TileID> required = coveringTiles(transformState);
 
     // Determine the overzooming/underzooming amounts.