[Skim-app-commit] SF.net SVN: skim-app:[12527] trunk/NSGraphics_SKExtensions.m

[hofman--- via Skim-app-commit]

Revision: 12527
          http://sourceforge.net/p/skim-app/code/12527
Author:   hofman
Date:     2021-11-06 10:30:04 +0000 (Sat, 06 Nov 2021)
Log Message:
-----------
Add a comment

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

Modified: trunk/NSGraphics_SKExtensions.m
===================================================================
--- trunk/NSGraphics_SKExtensions.m     2021-11-05 23:27:00 UTC (rev 12526)
+++ trunk/NSGraphics_SKExtensions.m     2021-11-06 10:30:04 UTC (rev 12527)
@@ -190,6 +190,7 @@
     if (sepia > 0.0)
         [filters addObject:[CIFilter filterWithName:@"CISepiaTone" 
keysAndValues:@"inputIntensity", [NSNumber numberWithDouble:fmin(sepia, 1.0)], 
nil]];
     if (SKHasDarkAppearance(NSApp) && [[NSUserDefaults standardUserDefaults] 
boolForKey:SKInvertColorsInDarkModeKey]) {
+        // this is almost equivalent to CIColorInvert, but with white mapped 
to dark gray ~ controlBackgroundColor
         [filters addObject:[CIFilter filterWithName:@"CIColorMatrix" 
keysAndValues:@"inputRVector", [CIVector vectorWithX:-0.987 Y:0.0 Z:0.0], 
@"inputGVector", [CIVector vectorWithX:0.0 Y:-0.987 Z:0.0], @"inputBVector", 
[CIVector vectorWithX:0.0 Y:0.0 Z:-0.987], @"inputBiasVector", [CIVector 
vectorWithX:1.0 Y:1.0 Z:1.0], nil]];
         [filters addObject:[CIFilter filterWithName:@"CIHueAdjust" 
keysAndValues:kCIInputAngleKey, [NSNumber numberWithDouble:M_PI], nil]];
     }

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