From 20c3706536ac9e927f80a50e9ec8906dfd0d2baf Mon Sep 17 00:00:00 2001
From: Tobrun <tobrun.van.nuland@gmail.com>
Date: Tue, 8 Mar 2016 07:30:18 -0500
Subject: [PATCH] [android] #4240 - add flag to resize only when needed.

---
 platform/android/src/native_map_view.cpp | 10 ++++++----
 platform/android/src/native_map_view.hpp |  2 +-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/platform/android/src/native_map_view.cpp b/platform/android/src/native_map_view.cpp
index 17b7755a2..23eb39dab 100755
--- a/platform/android/src/native_map_view.cpp
+++ b/platform/android/src/native_map_view.cpp
@@ -191,10 +191,11 @@ void NativeMapView::invalidate() {
 
 void NativeMapView::beforeRender() {
     mbgl::Log::Debug(mbgl::Event::Android, "NativeMapView::beforeRender()");
-    // this fixes the viewport resizing issue,
-    // but we are calling it every time.
-    // we should only call this when the resizeView / resizeFramebuffer is called.
-    glViewport(0,0,fbWidth,fbHeight);
+
+    if(sizeChanged){
+        sizeChanged = false;
+        glViewport(0, 0, fbWidth, fbHeight);
+    }
 }
 
 void NativeMapView::afterRender() {
@@ -751,6 +752,7 @@ void NativeMapView::updateFps() {
 void NativeMapView::resizeView(int w, int h) {
     width = w;
     height = h;
+    sizeChanged = true;
     map->update(mbgl::Update::Dimensions);
 }
 
diff --git a/platform/android/src/native_map_view.hpp b/platform/android/src/native_map_view.hpp
index bc5d457f5..5926f781a 100755
--- a/platform/android/src/native_map_view.hpp
+++ b/platform/android/src/native_map_view.hpp
@@ -75,8 +75,8 @@ private:
     std::string apiKey;
 
     bool firstTime = false;
-
     bool fpsEnabled = false;
+    bool sizeChanged = false;
     double fps = 0.0;
 
     int width = 0;