Revision: 12764
http://sourceforge.net/p/skim-app/code/12764
Author: hofman
Date: 2022-02-06 00:20:31 +0000 (Sun, 06 Feb 2022)
Log Message:
-----------
Include alpha components for color matrix
Modified Paths:
--------------
trunk/NSGraphics_SKExtensions.m
Modified: trunk/NSGraphics_SKExtensions.m
===================================================================
--- trunk/NSGraphics_SKExtensions.m 2022-02-04 15:35:28 UTC (rev 12763)
+++ trunk/NSGraphics_SKExtensions.m 2022-02-06 00:20:31 UTC (rev 12764)
@@ -219,7 +219,7 @@
// see
https://wiki.preterhuman.net/Matrix_Operations_for_Image_Processingand
https://beesbuzz.biz/code/16-hsv-color-transforms
if ((filter = [CIFilter filterWithName:@"CIGammaAdjust"
keysAndValues:@"inputPower", [NSNumber numberWithDouble:0.625], nil]))
[filters addObject:filter];
- if ((filter = [CIFilter filterWithName:@"CIColorMatrix"
keysAndValues:@"inputRVector", [CIVector vectorWithX:1.0-LR*f Y:-LG*f Z:-LB*f],
@"inputGVector", [CIVector vectorWithX:-LR*f Y:1.0-LG*f Z:-LB*f],
@"inputBVector", [CIVector vectorWithX:-LR*f Y:-LG*f Z:1.0-LB*f],
@"inputBiasVector", [CIVector vectorWithX:1.0 Y:1.0 Z:1.0], nil]))
+ if ((filter = [CIFilter filterWithName:@"CIColorMatrix"
keysAndValues:@"inputRVector", [CIVector vectorWithX:1.0-LR*f Y:-LG*f Z:-LB*f
W:0.0], @"inputGVector", [CIVector vectorWithX:-LR*f Y:1.0-LG*f Z:-LB*f W:0.0],
@"inputBVector", [CIVector vectorWithX:-LR*f Y:-LG*f Z:1.0-LB*f W:0.0],
@"inputAVector", [CIVector vectorWithX:0.0 Y:0.0 Z:0.0 W:1.0],
@"inputBiasVector", [CIVector vectorWithX:1.0 Y:1.0 Z:1.0 W:0.0], nil]))
[filters addObject:filter];
if ((filter = [CIFilter filterWithName:@"CIGammaAdjust"
keysAndValues:@"inputPower", [NSNumber numberWithDouble:1.6], nil]))
[filters addObject:filter];
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