[google_maps_flutter] Downsample wide gamut images to sRGB before serving them to google maps.

Author: gaaclarke

packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.4.3
+
+* Downsamples wide gamut tiles before serving them to google maps.
+
 ## 2.4.2
 
 * Makes the tile overlay callback invoke the platform channel on the platform thread.

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

@@ -123,39 +123,49 @@ - (void)requestTileForX:(NSUInteger)x
                    zoom:(NSUInteger)zoom
                receiver:(id<GMSTileReceiver>)receiver {
   dispatch_async(dispatch_get_main_queue(), ^{
-    [self.methodChannel invokeMethod:@"tileOverlay#getTile"
-        arguments:@{
-          @"tileOverlayId" : self.tileOverlayIdentifier,
-          @"x" : @(x),
-          @"y" : @(y),
-          @"zoom" : @(zoom)
-        }
-        result:^(id _Nullable result) {
-          UIImage *tileImage;
-          if ([result isKindOfClass:[NSDictionary class]]) {
-            FlutterStandardTypedData *typedData = (FlutterStandardTypedData *)result[@"data"];
-            if (typedData == nil) {
-              tileImage = kGMSTileLayerNoTile;
-            } else {
-              tileImage = [UIImage imageWithData:typedData.data];
-            }
-          } else {
-            if ([result isKindOfClass:[FlutterError class]]) {
-              FlutterError *error = (FlutterError *)result;
-              NSLog(@"Can't get tile: errorCode = %@, errorMessage = %@, details = %@",
-                    [error code], [error message], [error details]);
-            }
-            if ([result isKindOfClass:[FlutterMethodNotImplemented class]]) {
-              NSLog(@"Can't get tile: notImplemented");
-            }
-            tileImage = kGMSTileLayerNoTile;
-          }
-
-          [receiver receiveTileWithX:x y:y zoom:zoom image:tileImage];
-        }];
+    [self.methodChannel
+        invokeMethod:@"tileOverlay#getTile"
+           arguments:@{
+             @"tileOverlayId" : self.tileOverlayIdentifier,
+             @"x" : @(x),
+             @"y" : @(y),
+             @"zoom" : @(zoom)
+           }
+              result:^(id _Nullable result) {
+                UIImage *tileImage;
+                if ([result isKindOfClass:[NSDictionary class]]) {
+                  FlutterStandardTypedData *typedData = (FlutterStandardTypedData *)result[@"data"];
+                  if (typedData == nil) {
+                    tileImage = kGMSTileLayerNoTile;
+                  } else {
+                    tileImage = [UIImage imageWithData:typedData.data];
+                    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+                    CGContextRef context = CGBitmapContextCreate(nil, tileImage.size.width, tileImage.size.height, 8, 0, colorSpace, kCGImageAlphaPremultipliedLast);
+                    CGContextDrawImage(context, CGRectMake(0, 0, tileImage.size.width, tileImage.size.height), tileImage.CGImage);
+                    CGImageRef image = CGBitmapContextCreateImage(context);
+                    tileImage = [UIImage imageWithCGImage:image];
+                    CGImageRelease(image);
+                    CGContextRelease(context);
+                    CGColorSpaceRelease(colorSpace);
+                  }
+                } else {
+                  if ([result isKindOfClass:[FlutterError class]]) {
+                    FlutterError *error = (FlutterError *)result;
+                    NSLog(@"Can't get tile: errorCode = %@, errorMessage = %@, details = %@",
+                          [error code], [error message], [error details]);
+                  }
+                  if ([result isKindOfClass:[FlutterMethodNotImplemented class]]) {
+                    NSLog(@"Can't get tile: notImplemented");
+                  }
+                  tileImage = kGMSTileLayerNoTile;
+                }
+
+                [receiver receiveTileWithX:x y:y zoom:zoom image:tileImage];
+              }];
   });
 }
 
+
 @end
 
 @interface FLTTileOverlaysController ()

packages/google_maps_flutter/google_maps_flutter_ios/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_maps_flutter_ios
 description: iOS implementation of the google_maps_flutter plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter_ios
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 2.4.2
+version: 2.4.3
 
 environment:
   sdk: ^3.2.3