Revision: 13294
          http://sourceforge.net/p/skim-app/code/13294
Author:   hofman
Date:     2023-02-09 16:21:26 +0000 (Thu, 09 Feb 2023)
Log Message:
-----------
only reset drawing and alpha value when needed

Modified Paths:
--------------
    trunk/SKTransitionController.m

Modified: trunk/SKTransitionController.m
===================================================================
--- trunk/SKTransitionController.m      2023-02-09 15:59:20 UTC (rev 13293)
+++ trunk/SKTransitionController.m      2023-02-09 16:21:26 UTC (rev 13294)
@@ -776,9 +776,11 @@
         [filter setValue:[NSNumber numberWithDouble:newProgress] 
forKey:kCIInputTimeKey];
         [image release];
         image = [[filter outputImage] retain];
-        [metalView setAlphaValue:1.0];
+        if ([metalView alphaValue] <= 0.0) {
+            [self setNeedsDisplay:YES];
+            [metalView setAlphaValue:1.0];
+        }
         [metalView setNeedsDisplay:YES];
-        [self setNeedsDisplay:YES];
     }
 }
 

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