Update the decode solution to allows CoreGraphics avoid using any UIKit method

This is back compatible to old version's RAM behavior

Author: dreampiggy

SDWebImage/Core/SDImageCoderHelper.m

@@ -418,8 +418,8 @@ + (UIImage *)decodedImageWithImage:(UIImage *)image {
     }
 
     UIImage *decodedImage;
-#if SD_UIKIT
     SDImageCoderDecodeSolution decodeSolution = self.defaultDecodeSolution;
+#if SD_UIKIT
     if (decodeSolution == SDImageCoderDecodeSolutionAutomatic) {
         // See #3365, CMPhoto iOS 15 only supports JPEG/HEIF format, or it will print an error log :(
         SDImageFormat format = image.sd_imageFormat;
@@ -439,19 +439,31 @@ + (UIImage *)decodedImageWithImage:(UIImage *)image {
 
     CGImageRef imageRef = image.CGImage;
     if (!imageRef) {
+        // Only decode for CGImage-based
         return image;
     }
-    BOOL hasAlpha = [self CGImageContainsAlpha:imageRef];
-    // Prefer to use new Image Renderer to re-draw image, instead of low-level CGBitmapContext and CGContextDrawImage
-    // This can keep both OS compatible and don't fight with Apple's performance optimization
-    SDGraphicsImageRendererFormat *format = [[SDGraphicsImageRendererFormat alloc] init];
-    format.opaque = !hasAlpha;
-    format.scale = image.scale;
-    CGSize imageSize = image.size;
-    SDGraphicsImageRenderer *renderer = [[SDGraphicsImageRenderer alloc] initWithSize:imageSize format:format];
-    decodedImage = [renderer imageWithActions:^(CGContextRef  _Nonnull context) {
-            [image drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height)];
-    }];
+    
+    if (decodeSolution == SDImageCoderDecodeSolutionCoreGraphics) {
+        CGImageRef decodedImageRef = [self CGImageCreateDecoded:imageRef];
+#if SD_MAC
+        decodedImage = [[UIImage alloc] initWithCGImage:decodedImageRef scale:image.scale orientation:kCGImagePropertyOrientationUp];
+#else
+        decodedImage = [[UIImage alloc] initWithCGImage:decodedImageRef scale:image.scale orientation:image.imageOrientation];
+#endif
+        CGImageRelease(decodedImageRef);
+    } else {
+        BOOL hasAlpha = [self CGImageContainsAlpha:imageRef];
+        // Prefer to use new Image Renderer to re-draw image, instead of low-level CGBitmapContext and CGContextDrawImage
+        // This can keep both OS compatible and don't fight with Apple's performance optimization
+        SDGraphicsImageRendererFormat *format = SDGraphicsImageRendererFormat.preferredFormat;
+        format.opaque = !hasAlpha;
+        format.scale = image.scale;
+        CGSize imageSize = image.size;
+        SDGraphicsImageRenderer *renderer = [[SDGraphicsImageRenderer alloc] initWithSize:imageSize format:format];
+        decodedImage = [renderer imageWithActions:^(CGContextRef  _Nonnull context) {
+                [image drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height)];
+        }];
+    }
     SDImageCopyAssociatedObject(image, decodedImage);
     decodedImage.sd_isDecoded = YES;
     return decodedImage;
@@ -472,6 +484,10 @@ + (UIImage *)decodedAndScaledDownImageWithImage:(UIImage *)image limitBytes:(NSU
     tileTotalPixels = destTotalPixels / 3;
 
     CGImageRef sourceImageRef = image.CGImage;
+    if (!sourceImageRef) {
+        // Only decode for CGImage-based
+        return image;
+    }
     CGSize sourceResolution = CGSizeZero;
     sourceResolution.width = CGImageGetWidth(sourceImageRef);
     sourceResolution.height = CGImageGetHeight(sourceImageRef);