Revision: 12529
http://sourceforge.net/p/skim-app/code/12529
Author: hofman
Date: 2021-11-06 18:08:31 +0000 (Sat, 06 Nov 2021)
Log Message:
-----------
Combine CIColorInvert and CIHueAdjust into a single CIColorMatrix
Modified Paths:
--------------
trunk/NSGraphics_SKExtensions.m
Modified: trunk/NSGraphics_SKExtensions.m
===================================================================
--- trunk/NSGraphics_SKExtensions.m 2021-11-06 10:42:17 UTC (rev 12528)
+++ trunk/NSGraphics_SKExtensions.m 2021-11-06 18:08:31 UTC (rev 12529)
@@ -184,6 +184,9 @@
#pragma mark -
+#define A 0.329
+#define B -0.658
+
extern NSArray *SKColorEffectFilters(void) {
NSMutableArray *filters = [NSMutableArray array];
CIFilter *filter;
@@ -194,10 +197,10 @@
}
if (SKHasDarkAppearance(NSApp) && [[NSUserDefaults standardUserDefaults]
boolForKey:SKInvertColorsInDarkModeKey]) {
// this is almost equivalent to CIColorInvert, but with white mapped
to dark gray ~ controlBackgroundColor
- if ((filter = [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]))
+ // combined with a matrix representation of CIHueAdjust with
inpueAngle=M_PI
+ // CIColorInvert+CIHueAdjust would be A=1/3, B=-2/3
+ if ((filter = [CIFilter filterWithName:@"CIColorMatrix"
keysAndValues:@"inputRVector", [CIVector vectorWithX:A Y:B Z:B],
@"inputGVector", [CIVector vectorWithX:B Y:A Z:B], @"inputBVector", [CIVector
vectorWithX:B Y:B Z:A], @"inputBiasVector", [CIVector vectorWithX:1.0 Y:1.0
Z:1.0], nil]))
[filters addObject:filter];
- if ((filter = [CIFilter filterWithName:@"CIHueAdjust"
keysAndValues:kCIInputAngleKey, [NSNumber numberWithDouble:M_PI], nil]))
- [filters addObject:filter];
}
return filters;
}
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