Replace the background decode core function CGImageCreateDecoded with UIGraphicsRenderer, this one should use the perferred format

SDWebImage/Core/SDImageCoderHelper.m

@@ -12,6 +12,7 @@
 #import "NSData+ImageContentType.h"
 #import "SDAnimatedImageRep.h"
 #import "UIImage+ForceDecode.h"
+#import "SDGraphicsImageRenderer.h"
 #import "SDAssociatedObject.h"
 
 #if SD_UIKIT || SD_WATCH
@@ -257,22 +258,26 @@ static const CGFloat kDestSeemOverlap = 2.0f;   // the numbers of pixels to over
     }
     
     BOOL hasAlpha = [self CGImageContainsAlpha:cgImage];
-    // iOS prefer BGRA8888 (premultiplied) or BGRX8888 bitmapInfo for screen rendering, which is same as `UIGraphicsBeginImageContext()` or `- [CALayer drawInContext:]`
-    // Though you can use any supported bitmapInfo (see: https://developer.apple.com/library/content/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_context/dq_context.html#//apple_ref/doc/uid/TP30001066-CH203-BCIBHHBB ) and let Core Graphics reorder it when you call `CGContextDrawImage`
-    // But since our build-in coders use this bitmapInfo, this can have a little performance benefit
-    CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Host;
-    bitmapInfo |= hasAlpha ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst;
-    CGContextRef context = CGBitmapContextCreate(NULL, newWidth, newHeight, 8, 0, [self colorSpaceGetDeviceRGB], bitmapInfo);
-    if (!context) {
-        return NULL;
-    }
     
+    // Using UIGraphicsRenderer on supported platforms, and use the main screeen's perferred format (like Wide Color)
+    SDGraphicsImageRendererFormat *format = [SDGraphicsImageRendererFormat preferredFormat];
+    format.scale = 1; // use pixel instead of point
+    format.opaque = !hasAlpha;
+    SDGraphicsImageRenderer *renderer = [[SDGraphicsImageRenderer alloc] initWithSize:CGSizeMake(newWidth, newHeight) format:format];
+    UIImage *newImage = [renderer imageWithActions:^(CGContextRef  _Nonnull context) {
         // Apply transform
         CGAffineTransform transform = SDCGContextTransformFromOrientation(orientation, CGSizeMake(newWidth, newHeight));
         CGContextConcatCTM(context, transform);
-    CGContextDrawImage(context, CGRectMake(0, 0, width, height), cgImage); // The rect is bounding box of CGImage, don't swap width & height
+#if SD_MAC
-    CGImageRef newImageRef = CGBitmapContextCreateImage(context);
+        UIImage *drawImage = [[UIImage alloc] initWithCGImage:cgImage scale:1 orientation:kCGImagePropertyOrientationUp];
-    CGContextRelease(context);
+#else
+        UIImage *drawImage = [[UIImage alloc] initWithCGImage:cgImage scale:1 orientation:UIImageOrientationUp];
+#endif
+        [drawImage drawInRect:CGRectMake(0, 0, width, height)]; // The rect is bounding box of CGImage, don't swap width & height
+    }];
+    CGImageRef newImageRef = newImage.CGImage;
+    // Retain the CGImage because this temp `newImage` will release after function return
+    CGImageRetain(newImageRef);
     
     return newImageRef;
 }