[core] Move OpenGL extension initialization to Backend

1 files changed, 14 insertions, 16 deletions

diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index 6bd3092445..e8bc1b4b2a 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -1,7 +1,6 @@
 #import "MGLMapView_Private.h"
 
 #include <mbgl/util/logging.hpp>
-#include <mbgl/gl/extension.hpp>
 #include <mbgl/gl/context.hpp>
 
 #import <GLKit/GLKit.h>
@@ -610,21 +609,6 @@ public:
     [_glView bindDrawable];
     [self insertSubview:_glView atIndex:0];
     _glView.contentMode = UIViewContentModeCenter;
-
-    // load extensions
-    //
-    mbgl::gl::InitializeExtensions([](const char * name) {
-        static CFBundleRef framework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengles"));
-        if (!framework) {
-            throw std::runtime_error("Failed to load OpenGL framework.");
-        }
-
-        CFStringRef str = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingASCII);
-        void* symbol = CFBundleGetFunctionPointerForName(framework, str);
-        CFRelease(str);
-
-        return reinterpret_cast<mbgl::gl::glProc>(symbol);
-    });
 }
 
 - (UIImage *)compassImage
@@ -5436,6 +5420,20 @@ public:
         [nativeView didFinishLoadingStyle];
     }
 
+    mbgl::gl::ProcAddress initializeExtension(const char* name) override {
+        static CFBundleRef framework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengles"));
+        if (!framework) {
+            throw std::runtime_error("Failed to load OpenGL framework.");
+        }
+
+        CFStringRef str =
+            CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingASCII);
+        void* symbol = CFBundleGetFunctionPointerForName(framework, str);
+        CFRelease(str);
+
+        return reinterpret_cast<mbgl::gl::ProcAddress>(symbol);
+    }
+
     void invalidate() override
     {
         [nativeView setNeedsGLDisplay];