Replace deprecated UIGraphicsBeginImageContextWithOptions with UIGraphicsImageRenderer (#6285)

`UIGraphicsBeginImageContextWithOptions` isn't technically deprecated, but `API_TO_BE_DEPRECATED`.  However, according to reports it's crashing in iOS 17.  Replace usage with `UIGraphicsImageRenderer`, available in iOS 10.

I kept introducing horizontal flipping bugs when I was writing this, but it wasn't causing test failures.  Changed the test images from a single color to a gradient with different colors in each corner, then updated the tests to confirm the orientation is still correct.

Generated the test image with ImageMagick:
```
magick \( xc:red xc:blue +append \) \( xc:yellow xc:cyan +append \) -append -filter triangle -resize 12x7\! jpgImage.jpg
```

Also avoid doing extra work if there's nothing to scale, and return the original image.

Fixes https://github.com/flutter/flutter/issues/144602

packages/image_picker/image_picker_ios/CHANGELOG.md

@@ -1,6 +1,7 @@
-## NEXT
+## 0.8.9+2
 
 * Updates minimum iOS version to 12.0 and minimum Flutter version to 3.16.6.
+* Replaces deprecated UIGraphicsBeginImageContextWithOptions with UIGraphicsImageRenderer.
 
 ## 0.8.9+1
 

packages/image_picker/image_picker_ios/example/ios/RunnerTests/ImagePickerTestImages.m

@@ -15,59 +15,23 @@
     // embedded in the test bundle. Fall back to the base64 string representation of the jpg.
     data = [[NSData alloc]
         initWithBase64EncodedString:
-            @"/9j/4AAQSkZJRgABAQAALgAuAAD/4QCMRXhpZgAATU0AKgAAAAgABQESAAMAAAABAAEAAAEaAAUAAAABA"
-             "AAASgEbAAUAAAABAAAAUgEoAAMAAAABAAIAAIdpAAQAAAABAAAAWgAAAAAAAAAuAAAAAQAAAC4AAAABAAOg"
-             "AQADAAAAAQABAACgAgAEAAAAAQAAAAygAwAEAAAAAQAAAAcAAAAA/+EJc2h0dHA6Ly9ucy5hZG9iZS5jb20"
-             "veGFwLzEuMC8APD94cGFja2V0IGJlZ2luPSLvu78iIGlkPSJXNU0wTXBDZWhpSHpyZVN6TlRjemtjOWQiPz"
-             "4gPHg6eG1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0az0iWE1QIENvcmUgNS40LjAiP"
-             "iA8cmRmOlJERiB4bWxuczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvMDIvMjItcmRmLXN5bnRheC1ucy"
-             "MiPiA8cmRmOkRlc2NyaXB0aW9uIHJkZjphYm91dD0iIiB4bWxuczpwaG90b3Nob3A9Imh0dHA6Ly9ucy5hZ"
-             "G9iZS5jb20vcGhvdG9zaG9wLzEuMC8iIHBob3Rvc2hvcDpDcmVkaXQ9IsKpIEdvb2dsZSIvPiA8L3JkZjpSR"
-             "EY+IDwveDp4bXBtZXRhPiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-             "CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIDw/eHBhY2tldCBlbmQ9In"
-             "ciPz4A/+0AVlBob3Rvc2hvcCAzLjAAOEJJTQQEAAAAAAAdHAFaAAMbJUccAgAAAgACHAJuAAnCqSBHb29nbG"
-             "UAOEJJTQQlAAAAAAAQmkt2IF3PgNJVMGnV2zijEf/AABEIAAcADAMBIgACEQEDEQH/xAAfAAABBQEBAQEBAQA"
-             "AAAAAAAAAAQIDBAUGBwgJCgv/xAC1EAACAQMDAgQDBQUEBAAAAX0BAgMABBEFEiExQQYTUWEHInEUMoGRoQ"
-             "gjQrHBFVLR8CQzYnKCCQoWFxgZGiUmJygpKjQ1Njc4OTpDREVGR0hJSlNUVVZXWFlaY2RlZmdoaWpzdHV2d3h"
-             "5eoOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4eLj5OXm5+jp"
-             "6vHy8/T19vf4+fr/xAAfAQADAQEBAQEBAQEBAAAAAAAAAQIDBAUGBwgJCgv/xAC1EQACAQIEBAMEBwUEBAAB"
-             "AncAAQIDEQQFITEGEkFRB2FxEyIygQgUQpGhscEJIzNS8BVictEKFiQ04SXxFxgZGiYnKCkqNTY3ODk6Q0R"
-             "FRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqCg4SFhoeIiYqSk5SVlpeYmZqio6Slpqeoqaqys7S1tr"
-             "e4ubrCw8TFxsfIycrS09TV1tfY2dri4+Tl5ufo6ery8/T19vf4+fr/2wBDAAQDAwMDAgQDAwMEBAQFBgoGBg"
-             "UFBgwICQcKDgwPDg4MDQ0PERYTDxAVEQ0NExoTFRcYGRkZDxIbHRsYHRYYGRj/2wBDAQQEBAYFBgsGBgsYEA0"
-             "QGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBj/3QAEAAH/2gAMAwEA"
-             "AhEDEQA/AMWiiivzk/qo/9k="
+            @"/9j/4AAQSkZJRgABAQAASABIAAD/"
+            @"4QCMRXhpZgAATU0AKgAAAAgABQESAAMAAAABAAEAAAEaAAUAAAABAAAASgEbAAUAAAABAAAAUgEoAAMAAAABA"
+            @"AIAAIdpAAQAAAABAAAAWgAAAAAAAABIAAAAAQAAAEgAAAABAAOgAQADAAAAAQABAACgAgAEAAAAAQAAAAygAw"
+            @"AEAAAAAQAAAAcAAAAA/8AAEQgABwAMAwERAAIRAQMRAf/"
+            @"EAB8AAAEFAQEBAQEBAAAAAAAAAAABAgMEBQYHCAkKC//"
+            @"EALUQAAIBAwMCBAMFBQQEAAABfQECAwAEEQUSITFBBhNRYQcicRQygZGhCCNCscEVUtHwJDNicoIJChYXGBka"
+            @"JSYnKCkqNDU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6g4SFhoeIiYqSk5SVlpeYmZqio"
+            @"6Slpqeoqaqys7S1tre4ubrCw8TFxsfIycrS09TV1tfY2drh4uPk5ebn6Onq8fLz9PX29/j5+v/"
+            @"EAB8BAAMBAQEBAQEBAQEAAAAAAAABAgMEBQYHCAkKC//"
+            @"EALURAAIBAgQEAwQHBQQEAAECdwABAgMRBAUhMQYSQVEHYXETIjKBCBRCkaGxwQkjM1LwFWJy0QoWJDThJfEX"
+            @"GBkaJicoKSo1Njc4OTpDREVGR0hJSlNUVVZXWFlaY2RlZmdoaWpzdHV2d3h5eoKDhIWGh4iJipKTlJWWl5iZm"
+            @"qKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uLj5OXm5+jp6vLz9PX29/j5+v/"
+            @"bAEMAAgICAgICAwICAwUDAwMFBgUFBQUGCAYGBgYGCAoICAgICAgKCgoKCgoKCgwMDAwMDA4ODg4ODw8PDw8P"
+            @"Dw8PD//"
+            @"bAEMBAgMDBAQEBwQEBxALCQsQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQ"
+            @"EBAQEP/dAAQAAv/aAAwDAQACEQMRAD8A9S8ZfsFeG/sH/IUboe7V/JHgR4t4v+2/4XVdj908aPHLG/2P/"
+            @"B6PsfO5/YL8O7m/4mjdT3av966fi1ivZw/ddF2P8VZ+OeN9pP8Ac9X2P//Z"
                             options:0];
   }
   return data;
@@ -82,64 +46,14 @@
     // embedded in the test bundle. Fall back to the base64 string representation of the jpg.
     data = [[NSData alloc]
         initWithBase64EncodedString:
-            @"/9j/4AAQSkZJRgABAQAALgAuAAD/"
-            @"4QCMRXhpZgAATU0AKgAAAAgABQESAAMAAAABAAEAAAEaAAUAAAABAAAASgEbAAUAAAABAAAAUgEoAAMAAAABA"
-            @"AIAAIdpAAQAAAABAAAAWgAAAAAAAAAuAAAAAQAAAC4AAAABAAOgAQADAAAAAQABAACgAgAEAAAAAQAAAASgAw"
-            @"AEAAAAAQAAAAcAAAAA/"
-            @"+EJ12h0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8APD94cGFja2V0IGJlZ2luPSLvu78iIGlkPSJXNU0wTX"
-            @"BDZWhpSHpyZVN6TlRjemtjOWQiPz4gPHg6eG1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB"
-            @"0az0iWE1QIENvcmUgNi4wLjAiPiA8cmRmOlJERiB4bWxuczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkv"
-            @"MDIvMjItcmRmLXN5bnRheC1ucyMiPiA8cmRmOkRlc2NyaXB0aW9uIHJkZjphYm91dD0iIiB4bWxuczpwaG90b"
-            @"3Nob3A9Imh0dHA6Ly9ucy5hZG9iZS5jb20vcGhvdG9zaG9wLzEuMC8iIHhtbG5zOmRjPSJodHRwOi8vcHVybC"
-            @"5vcmcvZGMvZWxlbWVudHMvMS4xLyIgcGhvdG9zaG9wOkNyZWRpdD0iwqkgR29vZ2xlIj4gPGRjOnN1YmplY3Q"
-            @"+IDxyZGY6QmFnLz4gPC9kYzpzdWJqZWN0PiA8L3JkZjpEZXNjcmlwdGlvbj4gPC9yZGY6UkRGPiA8L3g6eG1w"
-            @"bWV0YT4gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI"
-            @"CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC"
-            @"AgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA"
-            @"gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg"
-            @"ICAgICAgICAgICAgICA8P3hwYWNrZXQgZW5kPSJ3Ij8+AP/"
-            @"tAFZQaG90b3Nob3AgMy4wADhCSU0EBAAAAAAAHRwBWgADGyVHHAIAAAIAAhwCbgAJwqkgR29vZ2xlADhCSU0E"
-            @"JQAAAAAAEJpLdiBdz4DSVTBp1ds4oxH/wAARCAAHAAQDASIAAhEBAxEB/"
-            @"8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/"
-            @"8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGR"
-            @"olJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqK"
-            @"jpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/"
-            @"8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/"
-            @"8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8R"
-            @"cYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJm"
-            @"aoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/"
-            @"9sAQwAEAwMDAwIEAwMDBAQEBQYKBgYFBQYMCAkHCg4MDw4ODA0NDxEWEw8QFRENDRMaExUXGBkZGQ8SGx0bGB"
-            @"0WGBkY/"
-            @"9sAQwEEBAQGBQYLBgYLGBANEBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGB"
-            @"gYGBgY/90ABAAB/9oADAMBAAIRAxEAPwDFooor85P6qP/Z"
+            @"/9j/4AAQSkZJRgABAQAAAAAAAAD/"
+            @"2wBDAAMCAgICAgMCAgIDAwMDBAYEBAQEBAgGBgUGCQgKCgkICQkKDA8MCgsOCwkJDRENDg8QEBEQCgwSExIQE"
+            @"w8QEBD/"
+            @"2wBDAQMDAwQDBAgEBAgQCwkLEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQE"
+            @"BAQEBD/wAARCAAHAAQDAREAAhEBAxEB/8QAFAABAAAAAAAAAAAAAAAAAAAABP/"
+            @"EAB0QAAECBwAAAAAAAAAAAAAAAAIABgQIFiVBQlH/xAAUAQEAAAAAAAAAAAAAAAAAAAAH/"
+            @"8QAHBEAAQQDAQAAAAAAAAAAAAAABAAHI1EIFlIX/9oADAMBAAIRAxEAPwA76kLbdSxV/"
+            @"PGxcTHjm7hXngUfVWgp+n0N3suLmqX/2Q=="
                             options:0];
   }
   return data;
@@ -154,10 +68,26 @@
     // embedded in the test bundle. Fall back to the base64 string representation of the png.
     data = [[NSData alloc]
         initWithBase64EncodedString:
-            @"iVBORw0KGgoAAAAEQ2dCSVAAIAYsuHdmAAAADUlIRFIAAAAMAAAABwgGAAAAPLKsJAAAAARnQU1BAACxjwv8Y"
-             "QUAAAABc1JHQgCuzhzpAAAAIGNIUk0AAHomAACAhAAA+"
-             "gAAAIDoAAB1MAAA6mAAADqYAAAXcJy6UTwAAAAJcEh"
-             "ZcwAABxMAAAcTAc4gDwgAAAAOSURBVGMwdX71nxTMMKqBCAwAsfuEYQAAAABJRU5ErkJggg=="
+            @"iVBORw0KGgoAAAANSUhEUgAAAAwAAAAHEAIAAADjQOcwAAAABGdBTUEAALGPC/"
+            @"xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAhGVYSWZNTQAqAAAACAA"
+            @"FARIAAwAAAAEAAQAAARoABQAAAAEAAABKARsABQAAAAEAAABSASgAAwAAAAEAAgAAh2kABAAAAAEAAABaAAAA"
+            @"AAAAAEgAAAABAAAASAAAAAEAA6ABAAMAAAABAAEAAKACAAQAAAABAAAADKADAAQAAAABAAAABwAAAACX5qZPA"
+            @"AAACXBIWXMAAAsTAAALEwEAmpwYAAACx2lUWHRYTUw6Y29tLmFkb2JlLnhtcAAAAAAAPHg6eG1wbWV0YSB4bW"
+            @"xuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0az0iWE1QIENvcmUgNi4wLjAiPgogICA8cmRmOlJERiB4bWx"
+            @"uczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvMDIvMjItcmRmLXN5bnRheC1ucyMiPgogICAgICA8cmRm"
+            @"OkRlc2NyaXB0aW9uIHJkZjphYm91dD0iIgogICAgICAgICAgICB4bWxuczp0aWZmPSJodHRwOi8vbnMuYWRvY"
+            @"mUuY29tL3RpZmYvMS4wLyIKICAgICAgICAgICAgeG1sbnM6ZXhpZj0iaHR0cDovL25zLmFkb2JlLmNvbS9leG"
+            @"lmLzEuMC8iPgogICAgICAgICA8dGlmZjpZUmVzb2x1dGlvbj43MjwvdGlmZjpZUmVzb2x1dGlvbj4KICAgICA"
+            @"gICAgPHRpZmY6UmVzb2x1dGlvblVuaXQ+"
+            @"MjwvdGlmZjpSZXNvbHV0aW9uVW5pdD4KICAgICAgICAgPHRpZmY6WFJlc29sdXRpb24+"
+            @"NzI8L3RpZmY6WFJlc29sdXRpb24+"
+            @"CiAgICAgICAgIDx0aWZmOk9yaWVudGF0aW9uPjE8L3RpZmY6T3JpZW50YXRpb24+"
+            @"CiAgICAgICAgIDxleGlmOlBpeGVsWERpbWVuc2lvbj4xMjwvZXhpZjpQaXhlbFhEaW1lbnNpb24+"
+            @"CiAgICAgICAgIDxleGlmOkNvbG9yU3BhY2U+"
+            @"MTwvZXhpZjpDb2xvclNwYWNlPgogICAgICAgICA8ZXhpZjpQaXhlbFlEaW1lbnNpb24+"
+            @"NzwvZXhpZjpQaXhlbFlEaW1lbnNpb24+CiAgICAgIDwvcmRmOkRlc2NyaXB0aW9uPgogICA8L3JkZjpSREY+"
+            @"CjwveDp4bXBtZXRhPgqm8GvmAAAAUElEQVQYGWP4/58BCJDJV6sYGERD9wPFHRimhjIwZK3KAopMDXUAqtv/"
+            @"XxQoAlKBquf/fyaQEDUACwOD2W0qGeSlSiWDPFWoZBB1vEa1wAYAWgsa+7/A1uQAAAAASUVORK5CYII="
                             options:0];
   }
   return data;

packages/image_picker/image_picker_ios/example/ios/RunnerTests/ImageUtilTests.m

@@ -8,31 +8,106 @@
 @import image_picker_ios.Test;
 @import XCTest;
 
+// Corner colors of test image scaled to 3x2. Format is "R G B A".
+static NSString *const kColorRepresentation3x2BottomLeftYellow = @"1 0.776471 0 1";
+static NSString *const kColorRepresentation3x2TopLeftRed = @"1 0.0666667 0 1";
+static NSString *const kColorRepresentation3x2BottomRightCyan = @"0 0.772549 1 1";
+static NSString *const kColorRepresentation3x2TopRightBlue = @"0 0.0705882 0.996078 1";
+
 @interface ImageUtilTests : XCTestCase
 @end
 
 @implementation ImageUtilTests
 
+static NSString *ColorStringAtPixel(UIImage *image, int pixelX, int pixelY) {
+  CGImageRef cgImage = image.CGImage;
+
+  uint32_t argb;
+  CGContextRef context1 = CGBitmapContextCreate(
+      &argb, 1, 1, CGImageGetBitsPerComponent(cgImage), CGImageGetBytesPerRow(cgImage),
+      CGColorSpaceCreateDeviceRGB(), CGImageGetBitmapInfo(cgImage));
+  CGContextDrawImage(
+      context1, CGRectMake(-pixelX, -pixelY, CGImageGetWidth(cgImage), CGImageGetHeight(cgImage)),
+      cgImage);
+  CGContextRelease(context1);
+  int blue = argb & 0xff;
+  int green = argb >> 8 & 0xff;
+  int red = argb >> 16 & 0xff;
+  int alpha = argb >> 24 & 0xff;
+
+  return [CIColor colorWithRed:red / 255.f
+                         green:green / 255.f
+                          blue:blue / 255.f
+                         alpha:alpha / 255.f]
+      .stringRepresentation;
+}
+
+- (void)testScaledImage_EqualSizeReturnsSameImage {
+  UIImage *image = [UIImage imageWithData:ImagePickerTestImages.JPGTestData];
+  UIImage *scaledImage = [FLTImagePickerImageUtil scaledImage:image
+                                                     maxWidth:@(image.size.width)
+                                                    maxHeight:@(image.size.height)
+                                          isMetadataAvailable:YES];
+
+  // Assert the same bytes pointer (not just equal objects).
+  XCTAssertEqual(image, scaledImage);
+}
+
+- (void)testScaledImage_NilSizeReturnsSameImage {
+  UIImage *image = [UIImage imageWithData:ImagePickerTestImages.JPGTestData];
+  UIImage *scaledImage = [FLTImagePickerImageUtil scaledImage:image
+                                                     maxWidth:nil
+                                                    maxHeight:nil
+                                          isMetadataAvailable:YES];
+
+  // Assert the same bytes pointer (not just equal objects).
+  XCTAssertEqual(image, scaledImage);
+}
+
 - (void)testScaledImage_ShouldBeScaled {
   UIImage *image = [UIImage imageWithData:ImagePickerTestImages.JPGTestData];
-  UIImage *newImage = [FLTImagePickerImageUtil scaledImage:image
-                                                  maxWidth:@3
-                                                 maxHeight:@2
-                                       isMetadataAvailable:YES];
 
-  XCTAssertEqual(newImage.size.width, 3);
-  XCTAssertEqual(newImage.size.height, 2);
+  CGFloat scaledWidth = 3;
+  CGFloat scaledHeight = 2;
+  UIImage *scaledImage = [FLTImagePickerImageUtil scaledImage:image
+                                                     maxWidth:@(scaledWidth)
+                                                    maxHeight:@(scaledHeight)
+                                          isMetadataAvailable:YES];
+  XCTAssertEqual(scaledImage.size.width, scaledWidth);
+  XCTAssertEqual(scaledImage.size.height, scaledHeight);
+
+  // Check the corners to make sure nothing has been rotated.
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, 0, 0),
+                        kColorRepresentation3x2BottomLeftYellow);
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, 0, scaledHeight - 1),
+                        kColorRepresentation3x2TopLeftRed);
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, scaledWidth - 1, 0),
+                        kColorRepresentation3x2BottomRightCyan);
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, scaledWidth - 1, scaledHeight - 1),
+                        kColorRepresentation3x2TopRightBlue);
 }
 
 - (void)testScaledImage_ShouldBeScaledWithNoMetadata {
   UIImage *image = [UIImage imageWithData:ImagePickerTestImages.JPGTestData];
-  UIImage *newImage = [FLTImagePickerImageUtil scaledImage:image
-                                                  maxWidth:@3
-                                                 maxHeight:@2
-                                       isMetadataAvailable:NO];
 
-  XCTAssertEqual(newImage.size.width, 3);
-  XCTAssertEqual(newImage.size.height, 2);
+  CGFloat scaledWidth = 3;
+  CGFloat scaledHeight = 2;
+  UIImage *scaledImage = [FLTImagePickerImageUtil scaledImage:image
+                                                     maxWidth:@(scaledWidth)
+                                                    maxHeight:@(scaledHeight)
+                                          isMetadataAvailable:NO];
+  XCTAssertEqual(scaledImage.size.width, scaledWidth);
+  XCTAssertEqual(scaledImage.size.height, scaledHeight);
+
+  // Check the corners to make sure nothing has been rotated.
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, 0, 0),
+                        kColorRepresentation3x2BottomLeftYellow);
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, 0, scaledHeight - 1),
+                        kColorRepresentation3x2TopLeftRed);
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, scaledWidth - 1, 0),
+                        kColorRepresentation3x2BottomRightCyan);
+  XCTAssertEqualObjects(ColorStringAtPixel(scaledImage, scaledWidth - 1, scaledHeight - 1),
+                        kColorRepresentation3x2TopRightBlue);
 }
 
 - (void)testScaledImage_ShouldBeCorrectRotation {

packages/image_picker/image_picker_ios/ios/Classes/FLTImagePickerImageUtil.m

@@ -28,16 +28,37 @@
 
 @implementation FLTImagePickerImageUtil : NSObject
 
+static UIImage *FLTImagePickerDrawScaledImage(UIImage *imageToScale, double width, double height) {
+  UIGraphicsImageRenderer *imageRenderer =
+      [[UIGraphicsImageRenderer alloc] initWithSize:CGSizeMake(width, height)
+                                             format:imageToScale.imageRendererFormat];
+  return [imageRenderer imageWithActions:^(UIGraphicsImageRendererContext *rendererContext) {
+    CGContextRef cgContext = rendererContext.CGContext;
+
+    // Flip vertically to translate between UIKit and Quartz.
+    CGContextTranslateCTM(cgContext, 0, height);
+    CGContextScaleCTM(cgContext, 1, -1);
+    CGContextDrawImage(cgContext, CGRectMake(0, 0, width, height), imageToScale.CGImage);
+  }];
+}
+
 + (UIImage *)scaledImage:(UIImage *)image
                 maxWidth:(NSNumber *)maxWidth
                maxHeight:(NSNumber *)maxHeight
      isMetadataAvailable:(BOOL)isMetadataAvailable {
   double originalWidth = image.size.width;
   double originalHeight = image.size.height;
-  double aspectRatio = originalWidth / originalHeight;
 
-  bool hasMaxWidth = maxWidth != nil;
-  bool hasMaxHeight = maxHeight != nil;
+  BOOL hasMaxWidth = maxWidth != nil;
+  BOOL hasMaxHeight = maxHeight != nil;
+
+  if ((originalWidth == maxWidth.doubleValue && originalHeight == maxHeight.doubleValue) ||
+      (!hasMaxWidth && !hasMaxHeight)) {
+    // Nothing to scale.
+    return image;
+  }
+
+  double aspectRatio = originalWidth / originalHeight;
 
   double width = hasMaxWidth ? MIN(round([maxWidth doubleValue]), originalWidth) : originalWidth;
   double height =
@@ -62,13 +83,7 @@
     UIImage *imageToScale = [UIImage imageWithCGImage:image.CGImage
                                                 scale:1
                                           orientation:image.imageOrientation];
-
-    UIGraphicsBeginImageContextWithOptions(CGSizeMake(width, height), NO, 1.0);
-    [imageToScale drawInRect:CGRectMake(0, 0, width, height)];
-
-    UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
-    UIGraphicsEndImageContext();
-    return scaledImage;
+    return FLTImagePickerDrawScaledImage(imageToScale, width, height);
   }
 
   // Scaling the image always rotate itself based on the current imageOrientation of the original
@@ -91,13 +106,7 @@
     width = height;
     height = temp;
   }
-
-  UIGraphicsBeginImageContextWithOptions(CGSizeMake(width, height), NO, 1.0);
-  [imageToScale drawInRect:CGRectMake(0, 0, width, height)];
-
-  UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
-  UIGraphicsEndImageContext();
-  return scaledImage;
+  return FLTImagePickerDrawScaledImage(imageToScale, width, height);
 }
 
 + (GIFInfo *)scaledGIFImage:(NSData *)data

packages/image_picker/image_picker_ios/pubspec.yaml

@@ -2,7 +2,7 @@ name: image_picker_ios
 description: iOS implementation of the image_picker plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/image_picker/image_picker_ios
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+image_picker%22
-version: 0.8.9+1
+version: 0.8.9+2
 
 environment:
   sdk: ^3.2.3