[#trivial] fixes rendered image quality on networked image nodes which have their image directly set. (#826)

Source/ASNetworkImageNode.h

@@ -120,13 +120,19 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, assign, readwrite) BOOL shouldRenderProgressImages;
 
 /**
- * The image quality of the current image. This is a number between 0 and 1 and can be used to track
+ * The image quality of the current image.
+ *
+ * If the URL is set, this is a number between 0 and 1 and can be used to track
  * progressive progress. Calculated by dividing number of bytes / expected number of total bytes.
+ * This is zero until the first progressive render or the final display.
+ *
+ * If the URL is unset, this is 1 if defaultImage or image is set to non-nil.
+ *
  */
 @property (nonatomic, assign, readonly) CGFloat currentImageQuality;
 
 /**
- * The image quality (value between 0 and 1) of the last image that completed displaying.
+ * The currentImageQuality (value between 0 and 1) of the last image that completed displaying.
  */
 @property (nonatomic, assign, readonly) CGFloat renderedImageQuality;
 

Source/ASNetworkImageNode.mm

@@ -141,6 +141,11 @@
     [self _locked_cancelDownloadAndClearImageWithResumePossibility:NO];
   }
   
+  // If our image is being set externally, the image quality is 100%
+  if (imageWasSetExternally) {
+    [self _setCurrentImageQuality:1.0];
+  }
+  
   [self _locked__setImage:image];
 }
 
@@ -227,7 +232,6 @@
   if (!_imageLoaded) {
     [self _setCurrentImageQuality:((_URL == nil) ? 0.0 : 1.0)];
     [self _locked__setImage:defaultImage];
-    
   }
 }