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flutter · Sep 19, 2023 · 83eadca · 83eadca
1 parent 702f23b
commit 83eadca
Showing 1 changed file with 15 additions and 12 deletions.
diff --git a/shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm b/shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm
@@ -35,17 +35,20 @@
 
 static const char* kApplicationKernelSnapshotFileName = "kernel_blob.bin";
 
-static BOOL DoesHardwareSupportsWideGamut() {
-  id<MTLDevice> device = MTLCreateSystemDefaultDevice();
-  BOOL result;
-  if (@available(iOS 13.0, *)) {
-    // MTLGPUFamilyApple2 = A9/A10
-    result = [device supportsFamily:MTLGPUFamilyApple2];
-  } else {
-    // A9/A10 on iOS 10+
-    result = [device supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily3_v2];
-  }
-  [device release];
+static BOOL DoesHardwareSupportWideGamut() {
+  static BOOL result = NO;
+  static dispatch_once_t once_token = 0;
+  dispatch_once(&once_token, ^{
+    id<MTLDevice> device = MTLCreateSystemDefaultDevice();
+    if (@available(iOS 13.0, *)) {
+      // MTLGPUFamilyApple2 = A9/A10
+      result = [device supportsFamily:MTLGPUFamilyApple2];
+    } else {
+      // A9/A10 on iOS 10+
+      result = [device supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily3_v2];
+    }
+    [device release];
+  });
   return result;
 }
 
@@ -173,7 +176,7 @@ static BOOL DoesHardwareSupportsWideGamut() {
 #else
   NSNumber* nsEnableWideGamut = [mainBundle objectForInfoDictionaryKey:@"FLTEnableWideGamut"];
   BOOL enableWideGamut =
-      (nsEnableWideGamut ? nsEnableWideGamut.boolValue : YES) && DoesHardwareSupportsWideGamut();
+      (nsEnableWideGamut ? nsEnableWideGamut.boolValue : YES) && DoesHardwareSupportWideGamut();
   settings.enable_wide_gamut = enableWideGamut;
 #endif