1 files changed, 51 insertions, 0 deletions
diff --git a/platform/ios/src/UIDevice+MGLAdditions.m b/platform/ios/src/UIDevice+MGLAdditions.m
new file mode 100644
index 0000000000..e9da77adda
--- /dev/null
+++ b/platform/ios/src/UIDevice+MGLAdditions.m
@@ -0,0 +1,51 @@
+#import "UIDevice+MGLAdditions.h"
+#include <sys/sysctl.h>
+
+@implementation UIDevice (MGLAdditions)
+
+- (NSString *)modelString {
+    char *typeSpecifier = "hw.machine";
+
+    size_t size;
+    sysctlbyname(typeSpecifier, NULL, &size, NULL, 0);
+
+    char *answer = malloc(size);
+    sysctlbyname(typeSpecifier, answer, &size, NULL, 0);
+
+    NSString *results = [NSString stringWithCString:answer encoding:NSUTF8StringEncoding];
+
+    free(answer);
+    return results;
+}
+
+- (BOOL)mgl_isLegacyDevice {
+    // This is a list of supported devices that cannot maintain a reasonable frame
+    // rate under typical load. For brevity, unsupported devices are not included.
+    NSSet *blacklist = [NSSet setWithObjects:
+        @"iPhone4", // iPhone 4s
+        @"iPhone5", // iPhone 5, 5c
+        @"iPhone6", // iPhone 5s
+
+        @"iPad2",   // iPad 2, Mini
+        @"iPad3",   // iPad 3
+        @"iPad4",   // iPad Air, Mini 2, Mini 3
+
+        @"iPod5",   // iPod Touch 5
+
+        nil
+    ];
+
+    NSString *model = [self modelString];
+
+    for (NSString *blacklistedModel in blacklist) {
+        if ([model hasPrefix:[blacklistedModel stringByAppendingString:@","]]) {
+            return YES;
+        }
+    }
+
+    // TODO: Also handle simulator using something like `ProcessInfo().environment["SIMULATOR_MODEL_IDENTIFIER"]`.
+
+    return NO;
+}
+
+@end