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https://github.com/facebook/react-native.git
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Oskar Kwaśniewski
ace81ff7d8
Summary: The goal of this PR is to migrate from deprecated `[UIScreen mainScreen]` and get the `displayScale` from currentTraitCollection. Both of those return the same values. ## Changelog: [IOS] [CHANGED] - retrieve screen scale from trait collection instead of UIScreen mainScreen Pull Request resolved: https://github.com/facebook/react-native/pull/41214 Test Plan: Go to Dimensions example and check that everything works as expected ### Before <img src="https://github.com/facebook/react-native/assets/52801365/53141e67-63e2-4c3b-818e-6a232aae8a5b" height="500" /> ### After <img src="https://github.com/facebook/react-native/assets/52801365/33728fce-0298-459c-b63e-a0b8ea34bde1" height="500" /> Reviewed By: NickGerleman Differential Revision: D50736794 Pulled By: javache fbshipit-source-id: d512cba1120204be95caf43ac9916f6597e2ccc8
69 lines
2.4 KiB
Objective-C
69 lines
2.4 KiB
Objective-C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "UIImage+Compare.h"
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@implementation UIImage (Compare)
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- (BOOL)compareWithImage:(UIImage *)image
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{
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NSAssert(CGSizeEqualToSize(self.size, image.size), @"Images must be same size.");
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// The images have the equal size, so we could use the smallest amount of bytes because of byte padding
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size_t minBytesPerRow = MIN(CGImageGetBytesPerRow(self.CGImage), CGImageGetBytesPerRow(image.CGImage));
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size_t referenceImageSizeBytes = CGImageGetHeight(self.CGImage) * minBytesPerRow;
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void *referenceImagePixels = calloc(1, referenceImageSizeBytes);
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void *imagePixels = calloc(1, referenceImageSizeBytes);
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if (!referenceImagePixels || !imagePixels) {
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free(referenceImagePixels);
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free(imagePixels);
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return NO;
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}
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CGContextRef referenceImageContext = CGBitmapContextCreate(
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referenceImagePixels,
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CGImageGetWidth(self.CGImage),
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CGImageGetHeight(self.CGImage),
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CGImageGetBitsPerComponent(self.CGImage),
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minBytesPerRow,
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CGImageGetColorSpace(self.CGImage),
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(CGBitmapInfo)kCGImageAlphaPremultipliedLast);
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CGContextRef imageContext = CGBitmapContextCreate(
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imagePixels,
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CGImageGetWidth(image.CGImage),
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CGImageGetHeight(image.CGImage),
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CGImageGetBitsPerComponent(image.CGImage),
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minBytesPerRow,
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CGImageGetColorSpace(image.CGImage),
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(CGBitmapInfo)kCGImageAlphaPremultipliedLast);
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CGFloat scaleFactor = [UITraitCollection currentTraitCollection].displayScale;
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CGContextScaleCTM(referenceImageContext, scaleFactor, scaleFactor);
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CGContextScaleCTM(imageContext, scaleFactor, scaleFactor);
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if (!referenceImageContext || !imageContext) {
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CGContextRelease(referenceImageContext);
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CGContextRelease(imageContext);
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free(referenceImagePixels);
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free(imagePixels);
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return NO;
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}
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CGContextDrawImage(referenceImageContext, CGRectMake(0.0f, 0.0f, self.size.width, self.size.height), self.CGImage);
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CGContextDrawImage(imageContext, CGRectMake(0.0f, 0.0f, image.size.width, image.size.height), image.CGImage);
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CGContextRelease(referenceImageContext);
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CGContextRelease(imageContext);
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BOOL imageEqual = (memcmp(referenceImagePixels, imagePixels, referenceImageSizeBytes) == 0);
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free(referenceImagePixels);
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free(imagePixels);
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return imageEqual;
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}
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@end
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