83 lines
2.7 KiB
Objective-C
83 lines
2.7 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTImageEditingManager.h"
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#import <UIKit/UIKit.h>
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#import "RCTConvert.h"
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#import "RCTLog.h"
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#import "RCTUtils.h"
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#import "RCTImageUtils.h"
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#import "RCTImageStoreManager.h"
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#import "RCTImageLoader.h"
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@implementation RCTImageEditingManager
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RCT_EXPORT_MODULE()
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@synthesize bridge = _bridge;
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/**
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* Crops an image and adds the result to the image store.
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*
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* @param imageTag A URL, a string identifying an asset etc.
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* @param cropData Dictionary with `offset`, `size` and `displaySize`.
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* `offset` and `size` are relative to the full-resolution image size.
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* `displaySize` is an optimization - if specified, the image will
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* be scaled down to `displaySize` rather than `size`.
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* All units are in px (not points).
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*/
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RCT_EXPORT_METHOD(cropImage:(NSString *)imageTag
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cropData:(NSDictionary *)cropData
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successCallback:(RCTResponseSenderBlock)successCallback
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errorCallback:(RCTResponseErrorBlock)errorCallback)
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{
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CGRect rect = {
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[RCTConvert CGPoint:cropData[@"offset"]],
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[RCTConvert CGSize:cropData[@"size"]]
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};
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[_bridge.imageLoader loadImageWithTag:imageTag callback:^(NSError *error, UIImage *image) {
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if (error) {
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errorCallback(error);
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return;
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}
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// Crop image
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CGSize targetSize = rect.size;
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CGRect targetRect = {{-rect.origin.x, -rect.origin.y}, image.size};
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CGAffineTransform transform = RCTTransformFromTargetRect(image.size, targetRect);
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UIImage *croppedImage = RCTTransformImage(image, targetSize, image.scale, transform);
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// Scale image
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if (cropData[@"displaySize"]) {
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targetSize = [RCTConvert CGSize:cropData[@"displaySize"]]; // in pixels
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RCTResizeMode resizeMode = [RCTConvert RCTResizeMode:cropData[@"resizeMode"] ?: @"contain"];
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targetRect = RCTTargetRect(croppedImage.size, targetSize, 1, resizeMode);
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transform = RCTTransformFromTargetRect(croppedImage.size, targetRect);
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croppedImage = RCTTransformImage(croppedImage, targetSize, image.scale, transform);
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}
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// Store image
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[_bridge.imageStoreManager storeImage:croppedImage withBlock:^(NSString *croppedImageTag) {
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if (!croppedImageTag) {
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NSString *errorMessage = @"Error storing cropped image in RCTImageStoreManager";
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RCTLogWarn(@"%@", errorMessage);
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errorCallback(RCTErrorWithMessage(errorMessage));
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return;
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}
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successCallback(@[croppedImageTag]);
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}];
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}];
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}
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@end
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