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2017-08-15 16:59:01 +08:00
commit bdc83e07ef
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+//
+//  UIImage+MultiFormat.m
+//  SDWebImage
+//
+//  Created by Olivier Poitrey on 07/06/13.
+//  Copyright (c) 2013 Dailymotion. All rights reserved.
+//
+
+#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)
+
+ (UIImage *)sd_imageWithData:(NSData *)data {
+    if (!data) {
+        return nil;
+    }
+    
+    UIImage *image;
+    NSString *imageContentType = [NSData sd_contentTypeForImageData:data];
+    if ([imageContentType isEqualToString:@"image/gif"]) {
+        image = [UIImage sd_animatedGIFWithData:data];
+    }
+#ifdef SD_WEBP
+    else if ([imageContentType isEqualToString:@"image/webp"])
+    {
+        image = [UIImage sd_imageWithWebPData:data];
+    }
+#endif
+    else {
+        image = [[UIImage alloc] initWithData:data];
+        UIImageOrientation orientation = [self sd_imageOrientationFromImageData:data];
+        if (orientation != UIImageOrientationUp) {
+            image = [UIImage imageWithCGImage:image.CGImage
+                                        scale:image.scale
+                                  orientation:orientation];
+        }
+    }
+
+
+    return image;
+}
+
+
+(UIImageOrientation)sd_imageOrientationFromImageData:(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;
+}
+
+
+
+@end