869 lines
34 KiB
Mathematica
869 lines
34 KiB
Mathematica
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/**
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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 <stdatomic.h>
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#import <objc/runtime.h>
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#import <ImageIO/ImageIO.h>
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#import <React/RCTConvert.h>
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#import <React/RCTDefines.h>
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#import <React/RCTImageLoader.h>
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#import <React/RCTLog.h>
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#import <React/RCTNetworking.h>
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#import <React/RCTUtils.h>
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#import "RCTImageCache.h"
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#import "RCTImageUtils.h"
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@implementation UIImage (React)
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- (CAKeyframeAnimation *)reactKeyframeAnimation
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{
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return objc_getAssociatedObject(self, _cmd);
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}
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- (void)setReactKeyframeAnimation:(CAKeyframeAnimation *)reactKeyframeAnimation
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{
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objc_setAssociatedObject(self, @selector(reactKeyframeAnimation), reactKeyframeAnimation, OBJC_ASSOCIATION_COPY_NONATOMIC);
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}
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@end
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@implementation RCTImageLoader
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{
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NSArray<id<RCTImageURLLoader>> *_loaders;
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NSArray<id<RCTImageDataDecoder>> *_decoders;
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NSOperationQueue *_imageDecodeQueue;
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dispatch_queue_t _URLRequestQueue;
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id<RCTImageCache> _imageCache;
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NSMutableArray *_pendingTasks;
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NSInteger _activeTasks;
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NSMutableArray *_pendingDecodes;
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NSInteger _scheduledDecodes;
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NSUInteger _activeBytes;
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__weak id<RCTImageRedirectProtocol> _redirectDelegate;
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}
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@synthesize bridge = _bridge;
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RCT_EXPORT_MODULE()
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- (instancetype)init
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{
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return [self initWithRedirectDelegate:nil];
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}
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- (instancetype)initWithRedirectDelegate:(id<RCTImageRedirectProtocol>)redirectDelegate
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{
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if (self = [super init]) {
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_redirectDelegate = redirectDelegate;
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}
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return self;
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}
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- (void)setUp
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{
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// Set defaults
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_maxConcurrentLoadingTasks = _maxConcurrentLoadingTasks ?: 4;
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_maxConcurrentDecodingTasks = _maxConcurrentDecodingTasks ?: 2;
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_maxConcurrentDecodingBytes = _maxConcurrentDecodingBytes ?: 30 * 1024 * 1024; // 30MB
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_URLRequestQueue = dispatch_queue_create("com.facebook.react.ImageLoaderURLRequestQueue", DISPATCH_QUEUE_SERIAL);
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}
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- (float)handlerPriority
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{
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return 2;
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}
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- (id<RCTImageCache>)imageCache
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{
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if (!_imageCache) {
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//set up with default cache
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_imageCache = [RCTImageCache new];
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}
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return _imageCache;
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}
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- (void)setImageCache:(id<RCTImageCache>)cache
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{
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if (_imageCache) {
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RCTLogWarn(@"RCTImageCache was already set and has now been overriden.");
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}
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_imageCache = cache;
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}
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- (id<RCTImageURLLoader>)imageURLLoaderForURL:(NSURL *)URL
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{
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if (!_maxConcurrentLoadingTasks) {
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[self setUp];
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}
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if (!_loaders) {
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// Get loaders, sorted in reverse priority order (highest priority first)
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RCTAssert(_bridge, @"Bridge not set");
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_loaders = [[_bridge modulesConformingToProtocol:@protocol(RCTImageURLLoader)] sortedArrayUsingComparator:^NSComparisonResult(id<RCTImageURLLoader> a, id<RCTImageURLLoader> b) {
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float priorityA = [a respondsToSelector:@selector(loaderPriority)] ? [a loaderPriority] : 0;
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float priorityB = [b respondsToSelector:@selector(loaderPriority)] ? [b loaderPriority] : 0;
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if (priorityA > priorityB) {
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return NSOrderedAscending;
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} else if (priorityA < priorityB) {
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return NSOrderedDescending;
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} else {
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return NSOrderedSame;
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}
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}];
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}
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if (RCT_DEBUG) {
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// Check for handler conflicts
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float previousPriority = 0;
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id<RCTImageURLLoader> previousLoader = nil;
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for (id<RCTImageURLLoader> loader in _loaders) {
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float priority = [loader respondsToSelector:@selector(loaderPriority)] ? [loader loaderPriority] : 0;
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if (previousLoader && priority < previousPriority) {
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return previousLoader;
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}
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if ([loader canLoadImageURL:URL]) {
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if (previousLoader) {
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if (priority == previousPriority) {
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RCTLogError(@"The RCTImageURLLoaders %@ and %@ both reported that"
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" they can load the URL %@, and have equal priority"
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" (%g). This could result in non-deterministic behavior.",
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loader, previousLoader, URL, priority);
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}
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} else {
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previousLoader = loader;
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previousPriority = priority;
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}
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}
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}
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return previousLoader;
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}
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// Normal code path
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for (id<RCTImageURLLoader> loader in _loaders) {
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if ([loader canLoadImageURL:URL]) {
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return loader;
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}
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}
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return nil;
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}
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- (id<RCTImageDataDecoder>)imageDataDecoderForData:(NSData *)data
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{
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if (!_maxConcurrentLoadingTasks) {
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[self setUp];
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}
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if (!_decoders) {
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// Get decoders, sorted in reverse priority order (highest priority first)
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RCTAssert(_bridge, @"Bridge not set");
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_decoders = [[_bridge modulesConformingToProtocol:@protocol(RCTImageDataDecoder)] sortedArrayUsingComparator:^NSComparisonResult(id<RCTImageDataDecoder> a, id<RCTImageDataDecoder> b) {
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float priorityA = [a respondsToSelector:@selector(decoderPriority)] ? [a decoderPriority] : 0;
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float priorityB = [b respondsToSelector:@selector(decoderPriority)] ? [b decoderPriority] : 0;
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if (priorityA > priorityB) {
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return NSOrderedAscending;
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} else if (priorityA < priorityB) {
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return NSOrderedDescending;
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} else {
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return NSOrderedSame;
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}
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}];
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}
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if (RCT_DEBUG) {
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// Check for handler conflicts
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float previousPriority = 0;
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id<RCTImageDataDecoder> previousDecoder = nil;
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for (id<RCTImageDataDecoder> decoder in _decoders) {
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float priority = [decoder respondsToSelector:@selector(decoderPriority)] ? [decoder decoderPriority] : 0;
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if (previousDecoder && priority < previousPriority) {
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return previousDecoder;
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}
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if ([decoder canDecodeImageData:data]) {
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if (previousDecoder) {
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if (priority == previousPriority) {
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RCTLogError(@"The RCTImageDataDecoders %@ and %@ both reported that"
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" they can decode the data <NSData %p; %tu bytes>, and"
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" have equal priority (%g). This could result in"
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" non-deterministic behavior.",
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decoder, previousDecoder, data, data.length, priority);
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}
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} else {
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previousDecoder = decoder;
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previousPriority = priority;
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}
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}
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}
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return previousDecoder;
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}
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// Normal code path
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for (id<RCTImageDataDecoder> decoder in _decoders) {
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if ([decoder canDecodeImageData:data]) {
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return decoder;
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}
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}
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return nil;
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}
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static UIImage *RCTResizeImageIfNeeded(UIImage *image,
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CGSize size,
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CGFloat scale,
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RCTResizeMode resizeMode)
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{
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if (CGSizeEqualToSize(size, CGSizeZero) ||
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CGSizeEqualToSize(image.size, CGSizeZero) ||
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CGSizeEqualToSize(image.size, size)) {
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return image;
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}
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CAKeyframeAnimation *animation = image.reactKeyframeAnimation;
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CGRect targetSize = RCTTargetRect(image.size, size, scale, resizeMode);
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CGAffineTransform transform = RCTTransformFromTargetRect(image.size, targetSize);
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image = RCTTransformImage(image, size, scale, transform);
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image.reactKeyframeAnimation = animation;
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return image;
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}
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- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
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callback:(RCTImageLoaderCompletionBlock)callback
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{
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return [self loadImageWithURLRequest:imageURLRequest
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size:CGSizeZero
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scale:1
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clipped:YES
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resizeMode:RCTResizeModeStretch
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progressBlock:nil
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partialLoadBlock:nil
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completionBlock:callback];
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}
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- (void)dequeueTasks
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{
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dispatch_async(_URLRequestQueue, ^{
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// Remove completed tasks
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NSMutableArray *tasksToRemove = nil;
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for (RCTNetworkTask *task in self->_pendingTasks.reverseObjectEnumerator) {
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switch (task.status) {
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case RCTNetworkTaskFinished:
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if (!tasksToRemove) {
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tasksToRemove = [NSMutableArray new];
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}
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[tasksToRemove addObject:task];
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self->_activeTasks--;
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break;
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case RCTNetworkTaskPending:
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break;
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case RCTNetworkTaskInProgress:
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// Check task isn't "stuck"
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if (task.requestToken == nil) {
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RCTLogWarn(@"Task orphaned for request %@", task.request);
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if (!tasksToRemove) {
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tasksToRemove = [NSMutableArray new];
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}
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[tasksToRemove addObject:task];
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self->_activeTasks--;
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[task cancel];
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}
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break;
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}
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}
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if (tasksToRemove) {
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[self->_pendingTasks removeObjectsInArray:tasksToRemove];
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}
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// Start queued decode
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NSInteger activeDecodes = self->_scheduledDecodes - self->_pendingDecodes.count;
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while (activeDecodes == 0 || (self->_activeBytes <= self->_maxConcurrentDecodingBytes &&
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activeDecodes <= self->_maxConcurrentDecodingTasks)) {
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dispatch_block_t decodeBlock = self->_pendingDecodes.firstObject;
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if (decodeBlock) {
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[self->_pendingDecodes removeObjectAtIndex:0];
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decodeBlock();
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} else {
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break;
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}
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}
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// Start queued tasks
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for (RCTNetworkTask *task in self->_pendingTasks) {
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if (MAX(self->_activeTasks, self->_scheduledDecodes) >= self->_maxConcurrentLoadingTasks) {
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break;
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}
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if (task.status == RCTNetworkTaskPending) {
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[task start];
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self->_activeTasks++;
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}
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}
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});
|
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}
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|
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|
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/**
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* This returns either an image, or raw image data, depending on the loading
|
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* path taken. This is useful if you want to skip decoding, e.g. when preloading
|
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* the image, or retrieving metadata.
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*/
|
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- (RCTImageLoaderCancellationBlock)_loadImageOrDataWithURLRequest:(NSURLRequest *)request
|
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size:(CGSize)size
|
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scale:(CGFloat)scale
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resizeMode:(RCTResizeMode)resizeMode
|
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progressBlock:(RCTImageLoaderProgressBlock)progressHandler
|
||
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partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadHandler
|
||
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completionBlock:(void (^)(NSError *error, id imageOrData, BOOL cacheResult, NSString *fetchDate))completionBlock
|
||
|
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{
|
||
|
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{
|
||
|
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NSMutableURLRequest *mutableRequest = [request mutableCopy];
|
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|
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[NSURLProtocol setProperty:@"RCTImageLoader"
|
||
|
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forKey:@"trackingName"
|
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|
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inRequest:mutableRequest];
|
||
|
|
|
||
|
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// Add missing png extension
|
||
|
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if (request.URL.fileURL && request.URL.pathExtension.length == 0) {
|
||
|
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mutableRequest.URL = [request.URL URLByAppendingPathExtension:@"png"];
|
||
|
|
}
|
||
|
|
if (_redirectDelegate != nil) {
|
||
|
|
mutableRequest.URL = [_redirectDelegate redirectAssetsURL:mutableRequest.URL];
|
||
|
|
}
|
||
|
|
request = mutableRequest;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Find suitable image URL loader
|
||
|
|
id<RCTImageURLLoader> loadHandler = [self imageURLLoaderForURL:request.URL];
|
||
|
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BOOL requiresScheduling = [loadHandler respondsToSelector:@selector(requiresScheduling)] ?
|
||
|
|
[loadHandler requiresScheduling] : YES;
|
||
|
|
|
||
|
|
__block atomic_bool cancelled = ATOMIC_VAR_INIT(NO);
|
||
|
|
// TODO: Protect this variable shared between threads.
|
||
|
|
__block dispatch_block_t cancelLoad = nil;
|
||
|
|
void (^completionHandler)(NSError *, id, NSString *) = ^(NSError *error, id imageOrData, NSString *fetchDate) {
|
||
|
|
cancelLoad = nil;
|
||
|
|
|
||
|
|
BOOL cacheResult = [loadHandler respondsToSelector:@selector(shouldCacheLoadedImages)] ?
|
||
|
|
[loadHandler shouldCacheLoadedImages] : YES;
|
||
|
|
|
||
|
|
// If we've received an image, we should try to set it synchronously,
|
||
|
|
// if it's data, do decoding on a background thread.
|
||
|
|
if (RCTIsMainQueue() && ![imageOrData isKindOfClass:[UIImage class]]) {
|
||
|
|
// Most loaders do not return on the main thread, so caller is probably not
|
||
|
|
// expecting it, and may do expensive post-processing in the callback
|
||
|
|
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
|
||
|
|
if (!atomic_load(&cancelled)) {
|
||
|
|
completionBlock(error, imageOrData, cacheResult, fetchDate);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
} else if (!atomic_load(&cancelled)) {
|
||
|
|
completionBlock(error, imageOrData, cacheResult, fetchDate);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// If the loader doesn't require scheduling we call it directly on
|
||
|
|
// the main queue.
|
||
|
|
if (loadHandler && !requiresScheduling) {
|
||
|
|
return [loadHandler loadImageForURL:request.URL
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
resizeMode:resizeMode
|
||
|
|
progressHandler:progressHandler
|
||
|
|
partialLoadHandler:partialLoadHandler
|
||
|
|
completionHandler:^(NSError *error, UIImage *image){
|
||
|
|
completionHandler(error, image, nil);
|
||
|
|
}];
|
||
|
|
}
|
||
|
|
|
||
|
|
// All access to URL cache must be serialized
|
||
|
|
if (!_URLRequestQueue) {
|
||
|
|
[self setUp];
|
||
|
|
}
|
||
|
|
|
||
|
|
__weak RCTImageLoader *weakSelf = self;
|
||
|
|
dispatch_async(_URLRequestQueue, ^{
|
||
|
|
__typeof(self) strongSelf = weakSelf;
|
||
|
|
if (atomic_load(&cancelled) || !strongSelf) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (loadHandler) {
|
||
|
|
cancelLoad = [loadHandler loadImageForURL:request.URL
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
resizeMode:resizeMode
|
||
|
|
progressHandler:progressHandler
|
||
|
|
partialLoadHandler:partialLoadHandler
|
||
|
|
completionHandler:^(NSError *error, UIImage *image) {
|
||
|
|
completionHandler(error, image, nil);
|
||
|
|
}];
|
||
|
|
} else {
|
||
|
|
// Use networking module to load image
|
||
|
|
cancelLoad = [strongSelf _loadURLRequest:request
|
||
|
|
progressBlock:progressHandler
|
||
|
|
completionBlock:completionHandler];
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
return ^{
|
||
|
|
BOOL alreadyCancelled = atomic_fetch_or(&cancelled, 1);
|
||
|
|
if (alreadyCancelled) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
dispatch_block_t cancelLoadLocal = cancelLoad;
|
||
|
|
cancelLoad = nil;
|
||
|
|
if (cancelLoadLocal) {
|
||
|
|
cancelLoadLocal();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
- (RCTImageLoaderCancellationBlock)_loadURLRequest:(NSURLRequest *)request
|
||
|
|
progressBlock:(RCTImageLoaderProgressBlock)progressHandler
|
||
|
|
completionBlock:(void (^)(NSError *error, id imageOrData, NSString *fetchDate))completionHandler
|
||
|
|
{
|
||
|
|
// Check if networking module is available
|
||
|
|
if (RCT_DEBUG && ![_bridge respondsToSelector:@selector(networking)]) {
|
||
|
|
RCTLogError(@"No suitable image URL loader found for %@. You may need to "
|
||
|
|
" import the RCTNetwork library in order to load images.",
|
||
|
|
request.URL.absoluteString);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
RCTNetworking *networking = [_bridge networking];
|
||
|
|
|
||
|
|
// Check if networking module can load image
|
||
|
|
if (RCT_DEBUG && ![networking canHandleRequest:request]) {
|
||
|
|
RCTLogError(@"No suitable image URL loader found for %@", request.URL.absoluteString);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use networking module to load image
|
||
|
|
RCTURLRequestCompletionBlock processResponse = ^(NSURLResponse *response, NSData *data, NSError *error) {
|
||
|
|
// Check for system errors
|
||
|
|
if (error) {
|
||
|
|
completionHandler(error, nil, nil);
|
||
|
|
return;
|
||
|
|
} else if (!response) {
|
||
|
|
completionHandler(RCTErrorWithMessage(@"Response metadata error"), nil, nil);
|
||
|
|
return;
|
||
|
|
} else if (!data) {
|
||
|
|
completionHandler(RCTErrorWithMessage(@"Unknown image download error"), nil, nil);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check for http errors
|
||
|
|
NSString *responseDate;
|
||
|
|
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
|
||
|
|
NSInteger statusCode = ((NSHTTPURLResponse *)response).statusCode;
|
||
|
|
if (statusCode != 200) {
|
||
|
|
NSString *errorMessage = [NSString stringWithFormat:@"Failed to load %@", response.URL];
|
||
|
|
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: errorMessage};
|
||
|
|
completionHandler([[NSError alloc] initWithDomain:NSURLErrorDomain
|
||
|
|
code:statusCode
|
||
|
|
userInfo:userInfo], nil, nil);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
responseDate = ((NSHTTPURLResponse *)response).allHeaderFields[@"Date"];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call handler
|
||
|
|
completionHandler(nil, data, responseDate);
|
||
|
|
};
|
||
|
|
|
||
|
|
// Download image
|
||
|
|
__weak __typeof(self) weakSelf = self;
|
||
|
|
__block RCTNetworkTask *task =
|
||
|
|
[networking networkTaskWithRequest:request
|
||
|
|
completionBlock:^(NSURLResponse *response, NSData *data, NSError *error) {
|
||
|
|
__typeof(self) strongSelf = weakSelf;
|
||
|
|
if (!strongSelf) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (error || !response || !data) {
|
||
|
|
NSError *someError = nil;
|
||
|
|
if (error) {
|
||
|
|
someError = error;
|
||
|
|
} else if (!response) {
|
||
|
|
someError = RCTErrorWithMessage(@"Response metadata error");
|
||
|
|
} else {
|
||
|
|
someError = RCTErrorWithMessage(@"Unknown image download error");
|
||
|
|
}
|
||
|
|
completionHandler(someError, nil, nil);
|
||
|
|
[strongSelf dequeueTasks];
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
dispatch_async(strongSelf->_URLRequestQueue, ^{
|
||
|
|
// Process image data
|
||
|
|
processResponse(response, data, nil);
|
||
|
|
|
||
|
|
// Prepare for next task
|
||
|
|
[strongSelf dequeueTasks];
|
||
|
|
});
|
||
|
|
}];
|
||
|
|
|
||
|
|
task.downloadProgressBlock = ^(int64_t progress, int64_t total) {
|
||
|
|
if (progressHandler) {
|
||
|
|
progressHandler(progress, total);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
if (task) {
|
||
|
|
if (!_pendingTasks) {
|
||
|
|
_pendingTasks = [NSMutableArray new];
|
||
|
|
}
|
||
|
|
[_pendingTasks addObject:task];
|
||
|
|
[self dequeueTasks];
|
||
|
|
}
|
||
|
|
|
||
|
|
return ^{
|
||
|
|
__typeof(self) strongSelf = weakSelf;
|
||
|
|
if (!strongSelf || !task) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
dispatch_async(strongSelf->_URLRequestQueue, ^{
|
||
|
|
[task cancel];
|
||
|
|
task = nil;
|
||
|
|
});
|
||
|
|
[strongSelf dequeueTasks];
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
|
||
|
|
size:(CGSize)size
|
||
|
|
scale:(CGFloat)scale
|
||
|
|
clipped:(BOOL)clipped
|
||
|
|
resizeMode:(RCTResizeMode)resizeMode
|
||
|
|
progressBlock:(RCTImageLoaderProgressBlock)progressBlock
|
||
|
|
partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
|
||
|
|
completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
|
||
|
|
{
|
||
|
|
__block atomic_bool cancelled = ATOMIC_VAR_INIT(NO);
|
||
|
|
// TODO: Protect this variable shared between threads.
|
||
|
|
__block dispatch_block_t cancelLoad = nil;
|
||
|
|
dispatch_block_t cancellationBlock = ^{
|
||
|
|
BOOL alreadyCancelled = atomic_fetch_or(&cancelled, 1);
|
||
|
|
if (alreadyCancelled) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
dispatch_block_t cancelLoadLocal = cancelLoad;
|
||
|
|
cancelLoad = nil;
|
||
|
|
if (cancelLoadLocal) {
|
||
|
|
cancelLoadLocal();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
__weak RCTImageLoader *weakSelf = self;
|
||
|
|
void (^completionHandler)(NSError *, id, BOOL, NSString *) = ^(NSError *error, id imageOrData, BOOL cacheResult, NSString *fetchDate) {
|
||
|
|
__typeof(self) strongSelf = weakSelf;
|
||
|
|
if (atomic_load(&cancelled) || !strongSelf) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!imageOrData || [imageOrData isKindOfClass:[UIImage class]]) {
|
||
|
|
cancelLoad = nil;
|
||
|
|
completionBlock(error, imageOrData);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check decoded image cache
|
||
|
|
if (cacheResult) {
|
||
|
|
UIImage *image = [[strongSelf imageCache] imageForUrl:imageURLRequest.URL.absoluteString
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
resizeMode:resizeMode
|
||
|
|
responseDate:fetchDate];
|
||
|
|
if (image) {
|
||
|
|
cancelLoad = nil;
|
||
|
|
completionBlock(nil, image);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
RCTImageLoaderCompletionBlock decodeCompletionHandler = ^(NSError *error_, UIImage *image) {
|
||
|
|
if (cacheResult && image) {
|
||
|
|
// Store decoded image in cache
|
||
|
|
[[strongSelf imageCache] addImageToCache:image
|
||
|
|
URL:imageURLRequest.URL.absoluteString
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
resizeMode:resizeMode
|
||
|
|
responseDate:fetchDate];
|
||
|
|
}
|
||
|
|
|
||
|
|
cancelLoad = nil;
|
||
|
|
completionBlock(error_, image);
|
||
|
|
};
|
||
|
|
|
||
|
|
cancelLoad = [strongSelf decodeImageData:imageOrData
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
clipped:clipped
|
||
|
|
resizeMode:resizeMode
|
||
|
|
completionBlock:decodeCompletionHandler];
|
||
|
|
};
|
||
|
|
|
||
|
|
cancelLoad = [self _loadImageOrDataWithURLRequest:imageURLRequest
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
resizeMode:resizeMode
|
||
|
|
progressBlock:progressBlock
|
||
|
|
partialLoadBlock:partialLoadBlock
|
||
|
|
completionBlock:completionHandler];
|
||
|
|
return cancellationBlock;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (RCTImageLoaderCancellationBlock)decodeImageData:(NSData *)data
|
||
|
|
size:(CGSize)size
|
||
|
|
scale:(CGFloat)scale
|
||
|
|
clipped:(BOOL)clipped
|
||
|
|
resizeMode:(RCTResizeMode)resizeMode
|
||
|
|
completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
|
||
|
|
{
|
||
|
|
if (data.length == 0) {
|
||
|
|
completionBlock(RCTErrorWithMessage(@"No image data"), nil);
|
||
|
|
return ^{};
|
||
|
|
}
|
||
|
|
|
||
|
|
__block atomic_bool cancelled = ATOMIC_VAR_INIT(NO);
|
||
|
|
void (^completionHandler)(NSError *, UIImage *) = ^(NSError *error, UIImage *image) {
|
||
|
|
if (RCTIsMainQueue()) {
|
||
|
|
// Most loaders do not return on the main thread, so caller is probably not
|
||
|
|
// expecting it, and may do expensive post-processing in the callback
|
||
|
|
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
|
||
|
|
if (!atomic_load(&cancelled)) {
|
||
|
|
completionBlock(error, clipped ? RCTResizeImageIfNeeded(image, size, scale, resizeMode) : image);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
} else if (!atomic_load(&cancelled)) {
|
||
|
|
completionBlock(error, clipped ? RCTResizeImageIfNeeded(image, size, scale, resizeMode) : image);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
id<RCTImageDataDecoder> imageDecoder = [self imageDataDecoderForData:data];
|
||
|
|
if (imageDecoder) {
|
||
|
|
return [imageDecoder decodeImageData:data
|
||
|
|
size:size
|
||
|
|
scale:scale
|
||
|
|
resizeMode:resizeMode
|
||
|
|
completionHandler:completionHandler] ?: ^{};
|
||
|
|
} else {
|
||
|
|
dispatch_block_t decodeBlock = ^{
|
||
|
|
// Calculate the size, in bytes, that the decompressed image will require
|
||
|
|
NSInteger decodedImageBytes = (size.width * scale) * (size.height * scale) * 4;
|
||
|
|
|
||
|
|
// Mark these bytes as in-use
|
||
|
|
self->_activeBytes += decodedImageBytes;
|
||
|
|
|
||
|
|
// Do actual decompression on a concurrent background queue
|
||
|
|
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
|
||
|
|
if (!atomic_load(&cancelled)) {
|
||
|
|
|
||
|
|
// Decompress the image data (this may be CPU and memory intensive)
|
||
|
|
UIImage *image = RCTDecodeImageWithData(data, size, scale, resizeMode);
|
||
|
|
|
||
|
|
#if RCT_DEV
|
||
|
|
CGSize imagePixelSize = RCTSizeInPixels(image.size, image.scale);
|
||
|
|
CGSize screenPixelSize = RCTSizeInPixels(RCTScreenSize(), RCTScreenScale());
|
||
|
|
if (imagePixelSize.width * imagePixelSize.height >
|
||
|
|
screenPixelSize.width * screenPixelSize.height) {
|
||
|
|
RCTLogInfo(@"[PERF ASSETS] Loading image at size %@, which is larger "
|
||
|
|
"than the screen size %@", NSStringFromCGSize(imagePixelSize),
|
||
|
|
NSStringFromCGSize(screenPixelSize));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (image) {
|
||
|
|
completionHandler(nil, image);
|
||
|
|
} else {
|
||
|
|
NSString *errorMessage = [NSString stringWithFormat:@"Error decoding image data <NSData %p; %tu bytes>", data, data.length];
|
||
|
|
NSError *finalError = RCTErrorWithMessage(errorMessage);
|
||
|
|
completionHandler(finalError, nil);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// We're no longer retaining the uncompressed data, so now we'll mark
|
||
|
|
// the decoding as complete so that the loading task queue can resume.
|
||
|
|
dispatch_async(self->_URLRequestQueue, ^{
|
||
|
|
self->_scheduledDecodes--;
|
||
|
|
self->_activeBytes -= decodedImageBytes;
|
||
|
|
[self dequeueTasks];
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
if (!_URLRequestQueue) {
|
||
|
|
[self setUp];
|
||
|
|
}
|
||
|
|
dispatch_async(_URLRequestQueue, ^{
|
||
|
|
// The decode operation retains the compressed image data until it's
|
||
|
|
// complete, so we'll mark it as having started, in order to block
|
||
|
|
// further image loads from happening until we're done with the data.
|
||
|
|
self->_scheduledDecodes++;
|
||
|
|
|
||
|
|
if (!self->_pendingDecodes) {
|
||
|
|
self->_pendingDecodes = [NSMutableArray new];
|
||
|
|
}
|
||
|
|
NSInteger activeDecodes = self->_scheduledDecodes - self->_pendingDecodes.count - 1;
|
||
|
|
if (activeDecodes == 0 || (self->_activeBytes <= self->_maxConcurrentDecodingBytes &&
|
||
|
|
activeDecodes <= self->_maxConcurrentDecodingTasks)) {
|
||
|
|
decodeBlock();
|
||
|
|
} else {
|
||
|
|
[self->_pendingDecodes addObject:decodeBlock];
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
return ^{
|
||
|
|
atomic_store(&cancelled, YES);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
- (RCTImageLoaderCancellationBlock)getImageSizeForURLRequest:(NSURLRequest *)imageURLRequest
|
||
|
|
block:(void(^)(NSError *error, CGSize size))callback
|
||
|
|
{
|
||
|
|
void (^completion)(NSError *, id, BOOL, NSString *) = ^(NSError *error, id imageOrData, BOOL cacheResult, NSString *fetchDate) {
|
||
|
|
CGSize size;
|
||
|
|
if ([imageOrData isKindOfClass:[NSData class]]) {
|
||
|
|
NSDictionary *meta = RCTGetImageMetadata(imageOrData);
|
||
|
|
|
||
|
|
NSInteger imageOrientation = [meta[(id)kCGImagePropertyOrientation] integerValue];
|
||
|
|
switch (imageOrientation) {
|
||
|
|
case kCGImagePropertyOrientationLeft:
|
||
|
|
case kCGImagePropertyOrientationRight:
|
||
|
|
case kCGImagePropertyOrientationLeftMirrored:
|
||
|
|
case kCGImagePropertyOrientationRightMirrored:
|
||
|
|
// swap width and height
|
||
|
|
size = (CGSize){
|
||
|
|
[meta[(id)kCGImagePropertyPixelHeight] doubleValue],
|
||
|
|
[meta[(id)kCGImagePropertyPixelWidth] doubleValue],
|
||
|
|
};
|
||
|
|
break;
|
||
|
|
case kCGImagePropertyOrientationUp:
|
||
|
|
case kCGImagePropertyOrientationDown:
|
||
|
|
case kCGImagePropertyOrientationUpMirrored:
|
||
|
|
case kCGImagePropertyOrientationDownMirrored:
|
||
|
|
default:
|
||
|
|
size = (CGSize){
|
||
|
|
[meta[(id)kCGImagePropertyPixelWidth] doubleValue],
|
||
|
|
[meta[(id)kCGImagePropertyPixelHeight] doubleValue],
|
||
|
|
};
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
UIImage *image = imageOrData;
|
||
|
|
size = (CGSize){
|
||
|
|
image.size.width * image.scale,
|
||
|
|
image.size.height * image.scale,
|
||
|
|
};
|
||
|
|
}
|
||
|
|
callback(error, size);
|
||
|
|
};
|
||
|
|
|
||
|
|
return [self _loadImageOrDataWithURLRequest:imageURLRequest
|
||
|
|
size:CGSizeZero
|
||
|
|
scale:1
|
||
|
|
resizeMode:RCTResizeModeStretch
|
||
|
|
progressBlock:NULL
|
||
|
|
partialLoadBlock:NULL
|
||
|
|
completionBlock:completion];
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma mark - RCTURLRequestHandler
|
||
|
|
|
||
|
|
- (BOOL)canHandleRequest:(NSURLRequest *)request
|
||
|
|
{
|
||
|
|
NSURL *requestURL = request.URL;
|
||
|
|
|
||
|
|
// If the data being loaded is a video, return NO
|
||
|
|
// Even better may be to implement this on the RCTImageURLLoader that would try to load it,
|
||
|
|
// but we'd have to run the logic both in RCTPhotoLibraryImageLoader and
|
||
|
|
// RCTAssetsLibraryRequestHandler. Once we drop iOS7 though, we'd drop
|
||
|
|
// RCTAssetsLibraryRequestHandler and can move it there.
|
||
|
|
static NSRegularExpression *videoRegex = nil;
|
||
|
|
if (!videoRegex) {
|
||
|
|
NSError *error = nil;
|
||
|
|
videoRegex = [NSRegularExpression regularExpressionWithPattern:@"(?:&|^)ext=MOV(?:&|$)"
|
||
|
|
options:NSRegularExpressionCaseInsensitive
|
||
|
|
error:&error];
|
||
|
|
if (error) {
|
||
|
|
RCTLogError(@"%@", error);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
NSString *query = requestURL.query;
|
||
|
|
if (query != nil && [videoRegex firstMatchInString:query
|
||
|
|
options:0
|
||
|
|
range:NSMakeRange(0, query.length)]) {
|
||
|
|
return NO;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (id<RCTImageURLLoader> loader in _loaders) {
|
||
|
|
// Don't use RCTImageURLLoader protocol for modules that already conform to
|
||
|
|
// RCTURLRequestHandler as it's inefficient to decode an image and then
|
||
|
|
// convert it back into data
|
||
|
|
if (![loader conformsToProtocol:@protocol(RCTURLRequestHandler)] &&
|
||
|
|
[loader canLoadImageURL:requestURL]) {
|
||
|
|
return YES;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return NO;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (id)sendRequest:(NSURLRequest *)request withDelegate:(id<RCTURLRequestDelegate>)delegate
|
||
|
|
{
|
||
|
|
__block RCTImageLoaderCancellationBlock requestToken;
|
||
|
|
requestToken = [self loadImageWithURLRequest:request callback:^(NSError *error, UIImage *image) {
|
||
|
|
if (error) {
|
||
|
|
[delegate URLRequest:requestToken didCompleteWithError:error];
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
NSString *mimeType = nil;
|
||
|
|
NSData *imageData = nil;
|
||
|
|
if (RCTImageHasAlpha(image.CGImage)) {
|
||
|
|
mimeType = @"image/png";
|
||
|
|
imageData = UIImagePNGRepresentation(image);
|
||
|
|
} else {
|
||
|
|
mimeType = @"image/jpeg";
|
||
|
|
imageData = UIImageJPEGRepresentation(image, 1.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
NSURLResponse *response = [[NSURLResponse alloc] initWithURL:request.URL
|
||
|
|
MIMEType:mimeType
|
||
|
|
expectedContentLength:imageData.length
|
||
|
|
textEncodingName:nil];
|
||
|
|
|
||
|
|
[delegate URLRequest:requestToken didReceiveResponse:response];
|
||
|
|
[delegate URLRequest:requestToken didReceiveData:imageData];
|
||
|
|
[delegate URLRequest:requestToken didCompleteWithError:nil];
|
||
|
|
}];
|
||
|
|
|
||
|
|
return requestToken;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)cancelRequest:(id)requestToken
|
||
|
|
{
|
||
|
|
if (requestToken) {
|
||
|
|
((RCTImageLoaderCancellationBlock)requestToken)();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|
||
|
|
|
||
|
|
@implementation RCTBridge (RCTImageLoader)
|
||
|
|
|
||
|
|
- (RCTImageLoader *)imageLoader
|
||
|
|
{
|
||
|
|
return [self moduleForClass:[RCTImageLoader class]];
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|