UIImage+MultiFormat.m
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/*
* This file is part of the SDWebImage package.
* (c) Olivier Poitrey <rs@dailymotion.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
#import "UIImage+MultiFormat.h"
#import "UIImage+GIF.h"
#import "NSData+ImageContentType.h"
#import <ImageIO/ImageIO.h>
#ifdef SD_WEBP
#import "UIImage+WebP.h"
#endif
@implementation UIImage (MultiFormat)
+ (nullable UIImage *)sd_imageWithData:(nullable NSData *)data {
if (!data) {
return nil;
}
UIImage *image;
SDImageFormat imageFormat = [NSData sd_imageFormatForImageData:data];
if (imageFormat == SDImageFormatGIF) {
image = [UIImage sd_animatedGIFWithData:data];
}
#ifdef SD_WEBP
else if (imageFormat == SDImageFormatWebP)
{
image = [UIImage sd_imageWithWebPData:data];
}
#endif
else {
image = [[UIImage alloc] initWithData:data];
#if SD_UIKIT || SD_WATCH
UIImageOrientation orientation = [self sd_imageOrientationFromImageData:data];
if (orientation != UIImageOrientationUp) {
image = [UIImage imageWithCGImage:image.CGImage
scale:image.scale
orientation:orientation];
}
#endif
}
return image;
}
#if SD_UIKIT || SD_WATCH
+(UIImageOrientation)sd_imageOrientationFromImageData:(nonnull NSData *)imageData {
UIImageOrientation result = UIImageOrientationUp;
CGImageSourceRef imageSource = CGImageSourceCreateWithData((__bridge CFDataRef)imageData, NULL);
if (imageSource) {
CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(imageSource, 0, NULL);
if (properties) {
CFTypeRef val;
int exifOrientation;
val = CFDictionaryGetValue(properties, kCGImagePropertyOrientation);
if (val) {
CFNumberGetValue(val, kCFNumberIntType, &exifOrientation);
result = [self sd_exifOrientationToiOSOrientation:exifOrientation];
} // else - if it's not set it remains at up
CFRelease((CFTypeRef) properties);
} else {
//NSLog(@"NO PROPERTIES, FAIL");
}
CFRelease(imageSource);
}
return result;
}
#pragma mark EXIF orientation tag converter
// Convert an EXIF image orientation to an iOS one.
// reference see here: http://sylvana.net/jpegcrop/exif_orientation.html
+ (UIImageOrientation) sd_exifOrientationToiOSOrientation:(int)exifOrientation {
UIImageOrientation orientation = UIImageOrientationUp;
switch (exifOrientation) {
case 1:
orientation = UIImageOrientationUp;
break;
case 3:
orientation = UIImageOrientationDown;
break;
case 8:
orientation = UIImageOrientationLeft;
break;
case 6:
orientation = UIImageOrientationRight;
break;
case 2:
orientation = UIImageOrientationUpMirrored;
break;
case 4:
orientation = UIImageOrientationDownMirrored;
break;
case 5:
orientation = UIImageOrientationLeftMirrored;
break;
case 7:
orientation = UIImageOrientationRightMirrored;
break;
default:
break;
}
return orientation;
}
#endif
- (nullable NSData *)sd_imageData {
return [self sd_imageDataAsFormat:SDImageFormatUndefined];
}
- (nullable NSData *)sd_imageDataAsFormat:(SDImageFormat)imageFormat {
NSData *imageData = nil;
if (self) {
#if SD_UIKIT || SD_WATCH
int alphaInfo = CGImageGetAlphaInfo(self.CGImage);
BOOL hasAlpha = !(alphaInfo == kCGImageAlphaNone ||
alphaInfo == kCGImageAlphaNoneSkipFirst ||
alphaInfo == kCGImageAlphaNoneSkipLast);
BOOL usePNG = hasAlpha;
// the imageFormat param has priority here. But if the format is undefined, we relly on the alpha channel
if (imageFormat != SDImageFormatUndefined) {
usePNG = (imageFormat == SDImageFormatPNG);
}
if (usePNG) {
imageData = UIImagePNGRepresentation(self);
} else {
imageData = UIImageJPEGRepresentation(self, (CGFloat)1.0);
}
#else
NSBitmapImageFileType imageFileType = NSJPEGFileType;
if (imageFormat == SDImageFormatGIF) {
imageFileType = NSGIFFileType;
} else if (imageFormat == SDImageFormatPNG) {
imageFileType = NSPNGFileType;
}
imageData = [NSBitmapImageRep representationOfImageRepsInArray:self.representations
usingType:imageFileType
properties:@{}];
#endif
}
return imageData;
}
@end