[google_maps_flutter] Fix ios tile overlay not loading when dealing with wide gamut images

packages/google_maps_flutter/google_maps_flutter_ios/example/ios12/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1430"
+   LastUpgradeVersion = "1510"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/ios/Runner.xcodeproj/project.pbxproj

@@ -17,11 +17,19 @@
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
 		982F2A6C27BADE17003C81F4 /* PartiallyMockedMapView.m in Sources */ = {isa = PBXBuildFile; fileRef = 982F2A6B27BADE17003C81F4 /* PartiallyMockedMapView.m */; };
+		F269303B2BB389BF00BF17C4 /* assets in Resources */ = {isa = PBXBuildFile; fileRef = F269303A2BB389BF00BF17C4 /* assets */; };
 		F7151F13265D7ED70028CB91 /* GoogleMapsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F7151F12265D7ED70028CB91 /* GoogleMapsTests.m */; };
 		FC8F35FC8CD533B128950487 /* libPods-RunnerTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = F267F68029D1A4E2E4C572A7 /* libPods-RunnerTests.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
+		F26930352BB36EF300BF17C4 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 97C146E61CF9000F007C117D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 97C146ED1CF9000F007C117D;
+			remoteInfo = Runner;
+		};
 		F7151F15265D7ED70028CB91 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 97C146E61CF9000F007C117D /* Project object */;
@@ -68,6 +76,8 @@
 		E52C6A6210A56F027C582EF9 /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Pods/Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
 		EA0E91726245EDC22B97E8B9 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 		F267F68029D1A4E2E4C572A7 /* libPods-RunnerTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-RunnerTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		F269302F2BB36EF300BF17C4 /* RunnerUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		F269303A2BB389BF00BF17C4 /* assets */ = {isa = PBXFileReference; lastKnownFileType = folder; path = assets; sourceTree = "<group>"; };
 		F7151F10265D7ED70028CB91 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		F7151F12265D7ED70028CB91 /* GoogleMapsTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = GoogleMapsTests.m; sourceTree = "<group>"; };
 		F7151F14265D7ED70028CB91 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -82,6 +92,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		F269302C2BB36EF300BF17C4 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		F7151F0D265D7ED70028CB91 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -132,6 +149,7 @@
 			children = (
 				97C146EE1CF9000F007C117D /* Runner.app */,
 				F7151F10265D7ED70028CB91 /* RunnerTests.xctest */,
+				F269302F2BB36EF300BF17C4 /* RunnerUITests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -174,6 +192,7 @@
 		F7151F11265D7ED70028CB91 /* RunnerTests */ = {
 			isa = PBXGroup;
 			children = (
+				F269303A2BB389BF00BF17C4 /* assets */,
 				F7151F12265D7ED70028CB91 /* GoogleMapsTests.m */,
 				982F2A6A27BADE17003C81F4 /* PartiallyMockedMapView.h */,
 				982F2A6B27BADE17003C81F4 /* PartiallyMockedMapView.m */,
@@ -207,6 +226,24 @@
 			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
 			productType = "com.apple.product-type.application";
 		};
+		F269302E2BB36EF300BF17C4 /* RunnerUITests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = F26930392BB36EF300BF17C4 /* Build configuration list for PBXNativeTarget "RunnerUITests" */;
+			buildPhases = (
+				F269302B2BB36EF300BF17C4 /* Sources */,
+				F269302C2BB36EF300BF17C4 /* Frameworks */,
+				F269302D2BB36EF300BF17C4 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				F26930362BB36EF300BF17C4 /* PBXTargetDependency */,
+			);
+			name = RunnerUITests;
+			productName = RunnerUITests;
+			productReference = F269302F2BB36EF300BF17C4 /* RunnerUITests.xctest */;
+			productType = "com.apple.product-type.bundle.ui-testing";
+		};
 		F7151F0F265D7ED70028CB91 /* RunnerTests */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = F7151F19265D7ED70028CB91 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
@@ -232,12 +269,17 @@
 		97C146E61CF9000F007C117D /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				LastSwiftUpdateCheck = 1530;
 				LastUpgradeCheck = 1510;
 				ORGANIZATIONNAME = "The Flutter Authors";
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
 						CreatedOnToolsVersion = 7.3.1;
 					};
+					F269302E2BB36EF300BF17C4 = {
+						CreatedOnToolsVersion = 15.3;
+						TestTargetID = 97C146ED1CF9000F007C117D;
+					};
 					F7151F0F265D7ED70028CB91 = {
 						CreatedOnToolsVersion = 12.5;
 						ProvisioningStyle = Automatic;
@@ -260,6 +302,7 @@
 			targets = (
 				97C146ED1CF9000F007C117D /* Runner */,
 				F7151F0F265D7ED70028CB91 /* RunnerTests */,
+				F269302E2BB36EF300BF17C4 /* RunnerUITests */,
 			);
 		};
 /* End PBXProject section */
@@ -276,10 +319,18 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		F269302D2BB36EF300BF17C4 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		F7151F0E265D7ED70028CB91 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				F269303B2BB389BF00BF17C4 /* assets in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -390,6 +441,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		F269302B2BB36EF300BF17C4 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		F7151F0C265D7ED70028CB91 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -402,6 +460,11 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		F26930362BB36EF300BF17C4 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 97C146ED1CF9000F007C117D /* Runner */;
+			targetProxy = F26930352BB36EF300BF17C4 /* PBXContainerItemProxy */;
+		};
 		F7151F16265D7ED70028CB91 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 97C146ED1CF9000F007C117D /* Runner */;
@@ -543,7 +606,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = S8QB4VV633;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -589,13 +652,74 @@
 			};
 			name = Release;
 		};
+		F26930372BB36EF300BF17C4 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = S8QB4VV633;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GENERATE_INFOPLIST_FILE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.4;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MARKETING_VERSION = 1.0;
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.flutter.plugins.RunnerUITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_TARGET_NAME = Runner;
+			};
+			name = Debug;
+		};
+		F26930382BB36EF300BF17C4 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = S8QB4VV633;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GENERATE_INFOPLIST_FILE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.4;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MARKETING_VERSION = 1.0;
+				MTL_FAST_MATH = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.flutter.plugins.RunnerUITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_TARGET_NAME = Runner;
+			};
+			name = Release;
+		};
 		F7151F17265D7ED70028CB91 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = E52C6A6210A56F027C582EF9 /* Pods-RunnerTests.debug.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = S8QB4VV633;
 				"EXCLUDED_ARCHS[sdk=iphonesimulator*]" = "i386 arm64";
 				INFOPLIST_FILE = RunnerTests/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -650,6 +774,15 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		F26930392BB36EF300BF17C4 /* Build configuration list for PBXNativeTarget "RunnerUITests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				F26930372BB36EF300BF17C4 /* Debug */,
+				F26930382BB36EF300BF17C4 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		F7151F19265D7ED70028CB91 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (

packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/ios/RunnerTests/GoogleMapsTests.m

@@ -17,6 +17,10 @@ @interface FLTGoogleMapFactory (Test)
 @interface GoogleMapsTests : XCTestCase
 @end
 
+@interface FLTTileProviderController (Testing)
+- (UIImage*)handleResultTile:(nullable UIImage*)tileImage;
+@end
+
 @implementation GoogleMapsTests
 
 - (void)testPlugin {
@@ -62,4 +66,20 @@ - (void)testMapsServiceSync {
   XCTAssertEqual(factory1.sharedMapServices, factory2.sharedMapServices);
 }
 
+- (void)testWideGamutImagesProperlyHandled {
+  FLTTileProviderController *controller = [[FLTTileProviderController alloc] init];
+
+  UIImage *wideGamutImage = [UIImage imageWithContentsOfFile:@"assets/widegamut.png"];
+
+  UIImage *downsampledImage = [controller handleResultTile:wideGamutImage];
+
+  CGImageRef imageRef = downsampledImage.CGImage;
+  CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef);
+  bool isFloat = (bitmapInfo && kCGBitmapFloatComponents);
+  size_t bitsPerComponent = CGImageGetBitsPerComponent(imageRef);
+
+  XCTAssert(isFloat == false);
+  XCTAssert(bitsPerComponent != 16);
+}
+
 @end

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/FLTGoogleMapTileOverlayController.m

@@ -118,6 +118,31 @@ - (instancetype)init:(FlutterMethodChannel *)methodChannel
 
 #pragma mark - GMSTileLayer method
 
+- (UIImage *)handleResultTile:(nullable UIImage*)tile {
+    CGImageRef imageRef = tile.CGImage;
+    CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef);
+    bool isFloat = (bitmapInfo && kCGBitmapFloatComponents);
+    size_t bitsPerComponent = CGImageGetBitsPerComponent(imageRef);
+
+    // Engine use f16 pixel format for wide gamut images
+    // If it is wide gamut, we want to downsample it
+    if (isFloat & (bitsPerComponent == 16)) {
+      CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+      CGContextRef context =
+          CGBitmapContextCreate(nil, tile.size.width, tile.size.height, 8, 0,
+                                colorSpace, kCGImageAlphaPremultipliedLast);
+      CGContextDrawImage(context,
+                         CGRectMake(0, 0, tile.size.width, tile.size.height),
+                         tile.CGImage);
+      CGImageRef image = CGBitmapContextCreateImage(context);
+      tile = [UIImage imageWithCGImage:image];
+      CGImageRelease(image);
+      CGContextRelease(context);
+      CGColorSpaceRelease(colorSpace);
+    }
+  return tile;
+}
+
 - (void)requestTileForX:(NSUInteger)x
                       y:(NSUInteger)y
                    zoom:(NSUInteger)zoom
@@ -137,7 +162,7 @@ - (void)requestTileForX:(NSUInteger)x
             if (typedData == nil) {
               tileImage = kGMSTileLayerNoTile;
             } else {
-              tileImage = [UIImage imageWithData:typedData.data];
+              tileImage = [self handleResultTile:[UIImage imageWithData:typedData.data]];
             }
           } else {
             if ([result isKindOfClass:[FlutterError class]]) {
@@ -150,7 +175,6 @@ - (void)requestTileForX:(NSUInteger)x
             }
             tileImage = kGMSTileLayerNoTile;
           }
-
           [receiver receiveTileWithX:x y:y zoom:zoom image:tileImage];
         }];
   });