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[camera] Fix coordinate rotation for setting focus- and exposure points on iOS (flutter#4158)
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‎packages/camera/camera/CHANGELOG.md

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## 0.8.1+5
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* Make sure the `setFocusPoint` and `setExposurePoint` coordinates work correctly in all orientations on iOS (instead of only in portrait mode).
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## 0.8.1+4
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* Silenced warnings that may occur during build when using a very

‎packages/camera/camera/example/ios/RunnerTests/CameraExposureTests.m

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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@import camera;
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@import XCTest;
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@import AVFoundation;
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#import <OCMock/OCMock.h>
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@interface FLTCam : NSObject <FlutterTexture,
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AVCaptureVideoDataOutputSampleBufferDelegate,
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AVCaptureAudioDataOutputSampleBufferDelegate>
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- (void)setExposurePointWithResult:(FlutterResult)result x:(double)x y:(double)y;
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@end
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@interface CameraExposureTests : XCTestCase
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@property(readonly, nonatomic) FLTCam *camera;
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@property(readonly, nonatomic) id mockDevice;
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@property(readonly, nonatomic) id mockUIDevice;
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@end
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@implementation CameraExposureTests
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- (void)setUp {
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_camera = [[FLTCam alloc] init];
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_mockDevice = OCMClassMock([AVCaptureDevice class]);
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_mockUIDevice = OCMPartialMock([UIDevice currentDevice]);
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}
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- (void)tearDown {
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[_mockDevice stopMocking];
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[_mockUIDevice stopMocking];
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}
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- (void)testSetExpsourePointWithResult_SetsExposurePointOfInterest {
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// UI is currently in landscape left orientation
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OCMStub([(UIDevice *)_mockUIDevice orientation]).andReturn(UIDeviceOrientationLandscapeLeft);
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// Exposure point of interest is supported
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OCMStub([_mockDevice isExposurePointOfInterestSupported]).andReturn(true);
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// Set mock device as the current capture device
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[_camera setValue:_mockDevice forKey:@"captureDevice"];
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// Run test
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[_camera
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setExposurePointWithResult:^void(id _Nullable result) {
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}
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x:1
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y:1];
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// Verify the focus point of interest has been set
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OCMVerify([_mockDevice setExposurePointOfInterest:CGPointMake(1, 1)]);
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}
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@end

‎packages/camera/camera/example/ios/RunnerTests/CameraFocusTests.m

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@@ -19,24 +19,26 @@ @interface FLTCam : NSObject <FlutterTexture,
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- (void)applyFocusMode;
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- (void)applyFocusMode:(FocusMode)focusMode onDevice:(AVCaptureDevice *)captureDevice;
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- (void)setFocusPointWithResult:(FlutterResult)result x:(double)x y:(double)y;
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@end
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@interface CameraFocusTests : XCTestCase
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@property(readonly, nonatomic) FLTCam *camera;
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@property(readonly, nonatomic) id mockDevice;
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@property(readonly, nonatomic) id mockUIDevice;
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@end
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@implementation CameraFocusTests
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- (void)setUp {
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_camera = [[FLTCam alloc] init];
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_mockDevice = OCMClassMock([AVCaptureDevice class]);
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_mockUIDevice = OCMPartialMock([UIDevice currentDevice]);
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}
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- (void)tearDown {
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// Put teardown code here. This method is called after the invocation of each test method in the
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// class.
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[_mockDevice stopMocking];
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[_mockUIDevice stopMocking];
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}
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- (void)testAutoFocusWithContinuousModeSupported_ShouldSetContinuousAutoFocus {
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[_camera applyFocusMode:FocusModeLocked onDevice:_mockDevice];
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}
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- (void)testSetFocusPointWithResult_SetsFocusPointOfInterest {
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// UI is currently in landscape left orientation
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OCMStub([(UIDevice *)_mockUIDevice orientation]).andReturn(UIDeviceOrientationLandscapeLeft);
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// Focus point of interest is supported
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OCMStub([_mockDevice isFocusPointOfInterestSupported]).andReturn(true);
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// Set mock device as the current capture device
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[_camera setValue:_mockDevice forKey:@"captureDevice"];
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// Run test
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[_camera
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setFocusPointWithResult:^void(id _Nullable result) {
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}
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x:1
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y:1];
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// Verify the focus point of interest has been set
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OCMVerify([_mockDevice setFocusPointOfInterest:CGPointMake(1, 1)]);
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}
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@end

‎packages/camera/camera/example/ios/RunnerTests/CameraUtilTests.m

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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@import camera;
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@import XCTest;
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@import AVFoundation;
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#import <OCMock/OCMock.h>
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@interface FLTCam : NSObject <FlutterTexture,
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AVCaptureVideoDataOutputSampleBufferDelegate,
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AVCaptureAudioDataOutputSampleBufferDelegate>
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- (CGPoint)getCGPointForCoordsWithOrientation:(UIDeviceOrientation)orientation
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x:(double)x
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y:(double)y;
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@end
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@interface CameraUtilTests : XCTestCase
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@property(readonly, nonatomic) FLTCam *camera;
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@end
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@implementation CameraUtilTests
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- (void)setUp {
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_camera = [[FLTCam alloc] init];
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}
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- (void)testGetCGPointForCoordsWithOrientation_ShouldRotateCoords {
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CGPoint point;
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point = [_camera getCGPointForCoordsWithOrientation:UIDeviceOrientationLandscapeLeft x:1 y:1];
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XCTAssertTrue(CGPointEqualToPoint(point, CGPointMake(1, 1)),
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@"Resulting coordinates are invalid.");
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point = [_camera getCGPointForCoordsWithOrientation:UIDeviceOrientationPortrait x:0 y:1];
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XCTAssertTrue(CGPointEqualToPoint(point, CGPointMake(1, 1)),
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@"Resulting coordinates are invalid.");
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point = [_camera getCGPointForCoordsWithOrientation:UIDeviceOrientationLandscapeRight x:0 y:0];
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XCTAssertTrue(CGPointEqualToPoint(point, CGPointMake(1, 1)),
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@"Resulting coordinates are invalid.");
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point = [_camera getCGPointForCoordsWithOrientation:UIDeviceOrientationPortraitUpsideDown
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x:1
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y:0];
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XCTAssertTrue(CGPointEqualToPoint(point, CGPointMake(1, 1)),
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@"Resulting coordinates are invalid.");
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}
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@end

‎packages/camera/camera/ios/Classes/CameraPlugin.m

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@@ -1041,15 +1041,43 @@ - (void)applyFocusMode:(FocusMode)focusMode onDevice:(AVCaptureDevice *)captureD
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[captureDevice unlockForConfiguration];
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}
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- (CGPoint)getCGPointForCoordsWithOrientation:(UIDeviceOrientation)orientation
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x:(double)x
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y:(double)y {
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double oldX = x, oldY = y;
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switch (orientation) {
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case UIDeviceOrientationPortrait: // 90 ccw
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y = 1 - oldX;
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x = oldY;
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break;
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case UIDeviceOrientationPortraitUpsideDown: // 90 cw
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x = 1 - oldY;
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y = oldX;
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break;
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case UIDeviceOrientationLandscapeRight: // 180
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x = 1 - x;
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y = 1 - y;
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break;
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case UIDeviceOrientationLandscapeLeft:
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default:
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// No rotation required
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break;
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}
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return CGPointMake(x, y);
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}
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- (void)setExposurePointWithResult:(FlutterResult)result x:(double)x y:(double)y {
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if (!_captureDevice.isExposurePointOfInterestSupported) {
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result([FlutterError errorWithCode:@"setExposurePointFailed"
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message:@"Device does not have exposure point capabilities"
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details:nil]);
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return;
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}
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UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
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[_captureDevice lockForConfiguration:nil];
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[_captureDevice setExposurePointOfInterest:CGPointMake(y, 1 - x)];
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[_captureDevice setExposurePointOfInterest:[self getCGPointForCoordsWithOrientation:orientation
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x:x
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y:y]];
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[_captureDevice unlockForConfiguration];
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// Retrigger auto exposure
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[self applyExposureMode];
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details:nil]);
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return;
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}
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UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
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[_captureDevice lockForConfiguration:nil];
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[_captureDevice setFocusPointOfInterest:CGPointMake(y, 1 - x)];
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[_captureDevice setFocusPointOfInterest:[self getCGPointForCoordsWithOrientation:orientation
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x:x
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y:y]];
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[_captureDevice unlockForConfiguration];
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// Retrigger auto focus
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[self applyFocusMode];
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result(nil);
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}
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‎packages/camera/camera/pubspec.yaml

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@@ -4,7 +4,7 @@ description: A Flutter plugin for getting information about and controlling the
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and streaming image buffers to dart.
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repository: https://github.com/flutter/plugins/tree/master/packages/camera/camera
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issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
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version: 0.8.1+4
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version: 0.8.1+5
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environment:
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sdk: ">=2.12.0 <3.0.0"

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