459 lines
18 KiB
Objective-C
459 lines
18 KiB
Objective-C
/*
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* This file is part of the SDWebImage package.
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* (c) Olivier Poitrey <rs@dailymotion.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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#import "SDImageIOCoder.h"
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#import "SDImageCoderHelper.h"
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#import "NSImage+Compatibility.h"
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#import "UIImage+Metadata.h"
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#import "SDImageGraphics.h"
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#import "SDImageIOAnimatedCoderInternal.h"
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#import <ImageIO/ImageIO.h>
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#import <CoreServices/CoreServices.h>
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// Specify File Size for lossy format encoding, like JPEG
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static NSString * kSDCGImageDestinationRequestedFileSize = @"kCGImageDestinationRequestedFileSize";
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// Support Xcode 15 SDK, use raw value instead of symbol
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static NSString * kSDCGImageDestinationEncodeRequest = @"kCGImageDestinationEncodeRequest";
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static NSString * kSDCGImageDestinationEncodeToSDR = @"kCGImageDestinationEncodeToSDR";
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static NSString * kSDCGImageDestinationEncodeToISOHDR = @"kCGImageDestinationEncodeToISOHDR";
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static NSString * kSDCGImageDestinationEncodeToISOGainmap = @"kCGImageDestinationEncodeToISOGainmap";
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@implementation SDImageIOCoder {
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size_t _width, _height;
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CGImagePropertyOrientation _orientation;
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CGImageSourceRef _imageSource;
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CGFloat _scale;
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BOOL _finished;
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BOOL _preserveAspectRatio;
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CGSize _thumbnailSize;
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BOOL _lazyDecode;
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BOOL _decodeToHDR;
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}
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#if SD_IMAGEIO_HDR_ENCODING
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+ (void)initialize {
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if (@available(macOS 15, iOS 18, tvOS 18, watchOS 11, *)) {
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// Use SDK instead of raw value
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kSDCGImageDestinationEncodeRequest = (__bridge NSString *)kCGImageDestinationEncodeRequest;
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kSDCGImageDestinationEncodeToSDR = (__bridge NSString *)kCGImageDestinationEncodeToSDR;
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kSDCGImageDestinationEncodeToISOHDR = (__bridge NSString *)kCGImageDestinationEncodeToISOHDR;
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kSDCGImageDestinationEncodeToISOGainmap = (__bridge NSString *)kCGImageDestinationEncodeToISOGainmap;
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}
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}
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#endif
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- (void)dealloc {
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if (_imageSource) {
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CFRelease(_imageSource);
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_imageSource = NULL;
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}
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#if SD_UIKIT
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[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidReceiveMemoryWarningNotification object:nil];
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#endif
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}
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- (void)didReceiveMemoryWarning:(NSNotification *)notification
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{
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if (_imageSource) {
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CGImageSourceRemoveCacheAtIndex(_imageSource, 0);
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}
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}
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+ (instancetype)sharedCoder {
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static SDImageIOCoder *coder;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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coder = [[SDImageIOCoder alloc] init];
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});
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return coder;
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}
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#pragma mark - Bitmap PDF representation
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+ (UIImage *)createBitmapPDFWithData:(nonnull NSData *)data pageNumber:(NSUInteger)pageNumber targetSize:(CGSize)targetSize preserveAspectRatio:(BOOL)preserveAspectRatio {
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NSParameterAssert(data);
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UIImage *image;
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CGDataProviderRef provider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
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if (!provider) {
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return nil;
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}
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CGPDFDocumentRef document = CGPDFDocumentCreateWithProvider(provider);
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CGDataProviderRelease(provider);
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if (!document) {
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return nil;
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}
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// `CGPDFDocumentGetPage` page number is 1-indexed.
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CGPDFPageRef page = CGPDFDocumentGetPage(document, pageNumber + 1);
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if (!page) {
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CGPDFDocumentRelease(document);
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return nil;
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}
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CGPDFBox box = kCGPDFMediaBox;
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CGRect rect = CGPDFPageGetBoxRect(page, box);
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CGRect targetRect = rect;
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if (!CGSizeEqualToSize(targetSize, CGSizeZero)) {
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targetRect = CGRectMake(0, 0, targetSize.width, targetSize.height);
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}
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CGFloat xRatio = targetRect.size.width / rect.size.width;
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CGFloat yRatio = targetRect.size.height / rect.size.height;
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CGFloat xScale = preserveAspectRatio ? MIN(xRatio, yRatio) : xRatio;
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CGFloat yScale = preserveAspectRatio ? MIN(xRatio, yRatio) : yRatio;
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// `CGPDFPageGetDrawingTransform` will only scale down, but not scale up, so we need calculate the actual scale again
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CGRect drawRect = CGRectMake( 0, 0, targetRect.size.width / xScale, targetRect.size.height / yScale);
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CGAffineTransform scaleTransform = CGAffineTransformMakeScale(xScale, yScale);
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CGAffineTransform transform = CGPDFPageGetDrawingTransform(page, box, drawRect, 0, preserveAspectRatio);
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SDGraphicsBeginImageContextWithOptions(targetRect.size, NO, 0);
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CGContextRef context = SDGraphicsGetCurrentContext();
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#if SD_UIKIT || SD_WATCH
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// Core Graphics coordinate system use the bottom-left, UIKit use the flipped one
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CGContextTranslateCTM(context, 0, targetRect.size.height);
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CGContextScaleCTM(context, 1, -1);
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#endif
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CGContextConcatCTM(context, scaleTransform);
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CGContextConcatCTM(context, transform);
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CGContextDrawPDFPage(context, page);
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image = SDGraphicsGetImageFromCurrentImageContext();
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SDGraphicsEndImageContext();
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CGPDFDocumentRelease(document);
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return image;
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}
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#pragma mark - Decode
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- (BOOL)canDecodeFromData:(nullable NSData *)data {
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return YES;
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}
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- (UIImage *)decodedImageWithData:(NSData *)data options:(nullable SDImageCoderOptions *)options {
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if (!data) {
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return nil;
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}
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CGFloat scale = 1;
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NSNumber *scaleFactor = options[SDImageCoderDecodeScaleFactor];
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if (scaleFactor != nil) {
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scale = MAX([scaleFactor doubleValue], 1) ;
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}
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CGSize thumbnailSize = CGSizeZero;
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NSValue *thumbnailSizeValue = options[SDImageCoderDecodeThumbnailPixelSize];
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if (thumbnailSizeValue != nil) {
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#if SD_MAC
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thumbnailSize = thumbnailSizeValue.sizeValue;
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#else
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thumbnailSize = thumbnailSizeValue.CGSizeValue;
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#endif
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}
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BOOL preserveAspectRatio = YES;
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NSNumber *preserveAspectRatioValue = options[SDImageCoderDecodePreserveAspectRatio];
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if (preserveAspectRatioValue != nil) {
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preserveAspectRatio = preserveAspectRatioValue.boolValue;
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}
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// Check vector format
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if ([NSData sd_imageFormatForImageData:data] == SDImageFormatPDF) {
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// History before iOS 16, ImageIO can decode PDF with rasterization size, but can't ever :(
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// So, use CoreGraphics to decode PDF (copy code from SDWebImagePDFCoder, may do refactor in the future)
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UIImage *image;
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NSUInteger pageNumber = 0; // Still use first page, may added options is user want
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#if SD_MAC
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// If don't use thumbnail, prefers the built-in generation of vector image
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// macOS's `NSImage` supports PDF built-in rendering
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if (thumbnailSize.width == 0 || thumbnailSize.height == 0) {
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NSPDFImageRep *imageRep = [[NSPDFImageRep alloc] initWithData:data];
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if (imageRep) {
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imageRep.currentPage = pageNumber;
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image = [[NSImage alloc] initWithSize:imageRep.size];
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[image addRepresentation:imageRep];
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image.sd_imageFormat = SDImageFormatPDF;
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return image;
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}
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}
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#endif
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image = [self.class createBitmapPDFWithData:data pageNumber:pageNumber targetSize:thumbnailSize preserveAspectRatio:preserveAspectRatio];
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image.sd_imageFormat = SDImageFormatPDF;
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return image;
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}
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BOOL lazyDecode = YES; // Defaults YES for static image coder
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NSNumber *lazyDecodeValue = options[SDImageCoderDecodeUseLazyDecoding];
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if (lazyDecodeValue != nil) {
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lazyDecode = lazyDecodeValue.boolValue;
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}
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BOOL decodeToHDR = [options[SDImageCoderDecodeToHDR] boolValue];
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NSString *typeIdentifierHint = options[SDImageCoderDecodeTypeIdentifierHint];
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if (!typeIdentifierHint) {
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// Check file extension and convert to UTI, from: https://stackoverflow.com/questions/1506251/getting-an-uniform-type-identifier-for-a-given-extension
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NSString *fileExtensionHint = options[SDImageCoderDecodeFileExtensionHint];
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if (fileExtensionHint) {
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typeIdentifierHint = (__bridge_transfer NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)fileExtensionHint, kUTTypeImage);
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// Ignore dynamic UTI
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if (UTTypeIsDynamic((__bridge CFStringRef)typeIdentifierHint)) {
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typeIdentifierHint = nil;
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}
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}
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} else if ([typeIdentifierHint isEqual:NSNull.null]) {
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// Hack if user don't want to imply file extension
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typeIdentifierHint = nil;
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}
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NSDictionary *creatingOptions = nil;
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if (typeIdentifierHint) {
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creatingOptions = @{(__bridge NSString *)kCGImageSourceTypeIdentifierHint : typeIdentifierHint};
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}
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CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)data, (__bridge CFDictionaryRef)creatingOptions);
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if (!source) {
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// Try again without UTType hint, the call site from user may provide the wrong UTType
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source = CGImageSourceCreateWithData((__bridge CFDataRef)data, nil);
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}
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if (!source) {
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return nil;
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}
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CFStringRef uttype = CGImageSourceGetType(source);
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SDImageFormat imageFormat = [NSData sd_imageFormatFromUTType:uttype];
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UIImage *image = [SDImageIOAnimatedCoder createFrameAtIndex:0 source:source scale:scale preserveAspectRatio:preserveAspectRatio thumbnailSize:thumbnailSize lazyDecode:lazyDecode animatedImage:NO decodeToHDR:decodeToHDR];
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CFRelease(source);
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image.sd_imageFormat = imageFormat;
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return image;
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}
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#pragma mark - Progressive Decode
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- (BOOL)canIncrementalDecodeFromData:(NSData *)data {
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return [self canDecodeFromData:data];
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}
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- (instancetype)initIncrementalWithOptions:(nullable SDImageCoderOptions *)options {
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self = [super init];
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if (self) {
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_imageSource = CGImageSourceCreateIncremental(NULL);
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CGFloat scale = 1;
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NSNumber *scaleFactor = options[SDImageCoderDecodeScaleFactor];
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if (scaleFactor != nil) {
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scale = MAX([scaleFactor doubleValue], 1);
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}
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_scale = scale;
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CGSize thumbnailSize = CGSizeZero;
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NSValue *thumbnailSizeValue = options[SDImageCoderDecodeThumbnailPixelSize];
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if (thumbnailSizeValue != nil) {
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#if SD_MAC
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thumbnailSize = thumbnailSizeValue.sizeValue;
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#else
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thumbnailSize = thumbnailSizeValue.CGSizeValue;
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#endif
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}
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_thumbnailSize = thumbnailSize;
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BOOL preserveAspectRatio = YES;
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NSNumber *preserveAspectRatioValue = options[SDImageCoderDecodePreserveAspectRatio];
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if (preserveAspectRatioValue != nil) {
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preserveAspectRatio = preserveAspectRatioValue.boolValue;
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}
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_preserveAspectRatio = preserveAspectRatio;
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BOOL lazyDecode = YES; // Defaults YES for static image coder
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NSNumber *lazyDecodeValue = options[SDImageCoderDecodeUseLazyDecoding];
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if (lazyDecodeValue != nil) {
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lazyDecode = lazyDecodeValue.boolValue;
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}
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_lazyDecode = lazyDecode;
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_decodeToHDR = [options[SDImageCoderDecodeToHDR] boolValue];
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#if SD_UIKIT
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveMemoryWarning:) name:UIApplicationDidReceiveMemoryWarningNotification object:nil];
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#endif
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}
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return self;
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}
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- (void)updateIncrementalData:(NSData *)data finished:(BOOL)finished {
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if (_finished) {
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return;
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}
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_finished = finished;
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// The following code is from http://www.cocoaintheshell.com/2011/05/progressive-images-download-imageio/
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// Thanks to the author @Nyx0uf
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// Update the data source, we must pass ALL the data, not just the new bytes
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CGImageSourceUpdateData(_imageSource, (__bridge CFDataRef)data, finished);
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if (_width + _height == 0) {
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CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(_imageSource, 0, NULL);
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if (properties) {
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NSInteger orientationValue = 1;
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CFTypeRef val = CFDictionaryGetValue(properties, kCGImagePropertyPixelHeight);
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if (val) CFNumberGetValue(val, kCFNumberLongType, &_height);
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val = CFDictionaryGetValue(properties, kCGImagePropertyPixelWidth);
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if (val) CFNumberGetValue(val, kCFNumberLongType, &_width);
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val = CFDictionaryGetValue(properties, kCGImagePropertyOrientation);
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if (val) CFNumberGetValue(val, kCFNumberNSIntegerType, &orientationValue);
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CFRelease(properties);
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// When we draw to Core Graphics, we lose orientation information,
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// which means the image below born of initWithCGIImage will be
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// oriented incorrectly sometimes. (Unlike the image born of initWithData
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// in didCompleteWithError.) So save it here and pass it on later.
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_orientation = (CGImagePropertyOrientation)orientationValue;
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}
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}
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}
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- (UIImage *)incrementalDecodedImageWithOptions:(SDImageCoderOptions *)options {
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UIImage *image;
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if (_width + _height > 0) {
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// Create the image
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CGFloat scale = _scale;
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NSNumber *scaleFactor = options[SDImageCoderDecodeScaleFactor];
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if (scaleFactor != nil) {
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scale = MAX([scaleFactor doubleValue], 1);
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}
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image = [SDImageIOAnimatedCoder createFrameAtIndex:0 source:_imageSource scale:scale preserveAspectRatio:_preserveAspectRatio thumbnailSize:_thumbnailSize lazyDecode:_lazyDecode animatedImage:NO decodeToHDR:_finished ? _decodeToHDR : NO];
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if (image) {
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CFStringRef uttype = CGImageSourceGetType(_imageSource);
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image.sd_imageFormat = [NSData sd_imageFormatFromUTType:uttype];
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}
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}
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return image;
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}
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#pragma mark - Encode
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- (BOOL)canEncodeToFormat:(SDImageFormat)format {
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return YES;
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}
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- (NSData *)encodedDataWithImage:(UIImage *)image format:(SDImageFormat)format options:(nullable SDImageCoderOptions *)options {
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if (!image) {
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return nil;
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}
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CGImageRef imageRef = image.CGImage;
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if (!imageRef) {
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// Earily return, supports CGImage only
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return nil;
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}
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if (format == SDImageFormatUndefined) {
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BOOL hasAlpha = [SDImageCoderHelper CGImageContainsAlpha:imageRef];
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if (hasAlpha) {
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format = SDImageFormatPNG;
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} else {
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format = SDImageFormatJPEG;
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}
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}
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NSMutableData *imageData = [NSMutableData data];
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CFStringRef imageUTType = [NSData sd_UTTypeFromImageFormat:format];
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// Create an image destination.
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CGImageDestinationRef imageDestination = CGImageDestinationCreateWithData((__bridge CFMutableDataRef)imageData, imageUTType, 1, NULL);
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if (!imageDestination) {
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// Handle failure.
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return nil;
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}
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NSMutableDictionary *properties = [NSMutableDictionary dictionary];
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#if SD_UIKIT || SD_WATCH
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CGImagePropertyOrientation exifOrientation = [SDImageCoderHelper exifOrientationFromImageOrientation:image.imageOrientation];
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#else
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CGImagePropertyOrientation exifOrientation = kCGImagePropertyOrientationUp;
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#endif
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properties[(__bridge NSString *)kCGImagePropertyOrientation] = @(exifOrientation);
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// Encoding Options
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double compressionQuality = 1;
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if (options[SDImageCoderEncodeCompressionQuality]) {
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compressionQuality = [options[SDImageCoderEncodeCompressionQuality] doubleValue];
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}
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properties[(__bridge NSString *)kCGImageDestinationLossyCompressionQuality] = @(compressionQuality);
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CGColorRef backgroundColor = [options[SDImageCoderEncodeBackgroundColor] CGColor];
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if (backgroundColor) {
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properties[(__bridge NSString *)kCGImageDestinationBackgroundColor] = (__bridge id)(backgroundColor);
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}
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CGSize maxPixelSize = CGSizeZero;
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NSValue *maxPixelSizeValue = options[SDImageCoderEncodeMaxPixelSize];
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if (maxPixelSizeValue != nil) {
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#if SD_MAC
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maxPixelSize = maxPixelSizeValue.sizeValue;
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#else
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maxPixelSize = maxPixelSizeValue.CGSizeValue;
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#endif
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}
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// HDR Encoding
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NSUInteger encodeToHDR = 0;
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if (options[SDImageCoderEncodeToHDR]) {
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encodeToHDR = [options[SDImageCoderEncodeToHDR] unsignedIntegerValue];
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}
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if (@available(macOS 15, iOS 18, tvOS 18, watchOS 11, *)) {
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if (encodeToHDR == SDImageHDRTypeISOHDR) {
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properties[kSDCGImageDestinationEncodeRequest] = kSDCGImageDestinationEncodeToISOHDR;
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} else if (encodeToHDR == SDImageHDRTypeISOGainMap) {
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properties[kSDCGImageDestinationEncodeRequest] = kSDCGImageDestinationEncodeToISOGainmap;
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} else {
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properties[kSDCGImageDestinationEncodeRequest] = kSDCGImageDestinationEncodeToSDR;
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}
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}
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CGFloat pixelWidth = (CGFloat)CGImageGetWidth(imageRef);
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CGFloat pixelHeight = (CGFloat)CGImageGetHeight(imageRef);
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CGFloat finalPixelSize = 0;
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BOOL encodeFullImage = maxPixelSize.width == 0 || maxPixelSize.height == 0 || pixelWidth == 0 || pixelHeight == 0 || (pixelWidth <= maxPixelSize.width && pixelHeight <= maxPixelSize.height);
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if (!encodeFullImage) {
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// Thumbnail Encoding
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CGFloat pixelRatio = pixelWidth / pixelHeight;
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CGFloat maxPixelSizeRatio = maxPixelSize.width / maxPixelSize.height;
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if (pixelRatio > maxPixelSizeRatio) {
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finalPixelSize = MAX(maxPixelSize.width, maxPixelSize.width / pixelRatio);
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} else {
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finalPixelSize = MAX(maxPixelSize.height, maxPixelSize.height * pixelRatio);
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}
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properties[(__bridge NSString *)kCGImageDestinationImageMaxPixelSize] = @(finalPixelSize);
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}
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NSUInteger maxFileSize = [options[SDImageCoderEncodeMaxFileSize] unsignedIntegerValue];
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if (maxFileSize > 0) {
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properties[kSDCGImageDestinationRequestedFileSize] = @(maxFileSize);
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// Remove the quality if we have file size limit
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properties[(__bridge NSString *)kCGImageDestinationLossyCompressionQuality] = nil;
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}
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BOOL embedThumbnail = NO;
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if (options[SDImageCoderEncodeEmbedThumbnail]) {
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embedThumbnail = [options[SDImageCoderEncodeEmbedThumbnail] boolValue];
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}
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properties[(__bridge NSString *)kCGImageDestinationEmbedThumbnail] = @(embedThumbnail);
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// Add your image to the destination.
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CGImageDestinationAddImage(imageDestination, imageRef, (__bridge CFDictionaryRef)properties);
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// Finalize the destination.
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if (CGImageDestinationFinalize(imageDestination) == NO) {
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// Handle failure.
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imageData = nil;
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}
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CFRelease(imageDestination);
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return [imageData copy];
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}
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@end
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