From e8ff5419a08bf5eae639bbf6bdebe9692a0b3d53 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sat, 7 Jun 2014 23:21:18 +0300
Subject: Fallback to safe OpenGL mode if OpenGL version is lower than 2.0.

---
 src/client.cpp          |  7 +------
 src/graphicsmanager.cpp | 24 ++++++++++++++++++++++++
 src/graphicsmanager.h   |  2 ++
 3 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/src/client.cpp b/src/client.cpp
index 12d0b82a3..8ddb5dcdd 100644
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -627,12 +627,7 @@ void Client::gameClear()
     if (logger)
         logger->log1("Quitting3");
 
-    delete2(mainGraphics);
-
-    if (imageHelper != surfaceImageHelper)
-        delete surfaceImageHelper;
-    surfaceImageHelper = nullptr;
-    delete2(imageHelper);
+    graphicsManager.deleteRenderers();
 
     if (logger)
         logger->log1("Quitting4");
diff --git a/src/graphicsmanager.cpp b/src/graphicsmanager.cpp
index 25c083124..5cdda823f 100644
--- a/src/graphicsmanager.cpp
+++ b/src/graphicsmanager.cpp
@@ -62,6 +62,7 @@
 #include "resources/surfaceimagehelper.h"
 #endif
 
+#include "utils/delete2.h"
 #include "utils/sdlhelper.h"
 #include "utils/stringutils.h"
 
@@ -356,6 +357,15 @@ void GraphicsManager::createRenderers()
 #endif  // USE_OPENGL
 }
 
+void GraphicsManager::deleteRenderers()
+{
+    delete2(mainGraphics);
+    if (imageHelper != surfaceImageHelper)
+        delete surfaceImageHelper;
+    surfaceImageHelper = nullptr;
+    delete2(imageHelper);
+}
+
 void GraphicsManager::setVideoMode()
 {
     const int bpp = 0;
@@ -439,6 +449,20 @@ void GraphicsManager::initGraphics()
     createRenderers();
     detectPixelSize();
     setVideoMode();
+#ifdef USE_OPENGL
+    if (openGLMode == RENDER_NORMAL_OPENGL || openGLMode == RENDER_GLES_OPENGL)
+    {
+        if (!checkGLVersion(2, 0))
+        {
+            logger->log("Fallback to safe OpenGL mode");
+            openGLMode = RENDER_SAFE_OPENGL;
+            deleteRenderers();
+            createRenderers();
+            detectPixelSize();
+            setVideoMode();
+        }
+    }
+#endif
 }
 
 #ifdef USE_SDL2
diff --git a/src/graphicsmanager.h b/src/graphicsmanager.h
index b0d6e9c9f..963e8dbb7 100644
--- a/src/graphicsmanager.h
+++ b/src/graphicsmanager.h
@@ -78,6 +78,8 @@ class GraphicsManager final
 
         void createRenderers();
 
+        void deleteRenderers();
+
         void initGraphics();
 
         static void setVideoMode();
-- 
cgit v1.2.3-70-g09d2