Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: CIColorMap inputGradientImage?

What is the "original spectrum"? Is it the hue component from 0 to 1 after converting RGB to HSB?

I created such an image (below) and it messes up the picture, so I that guess must be wrong.

NSBitmapImageRep *bitmap = [[NSBitmapImageRep allocWithZone: [self zone]] initWithBitmapDataPlanes:NULL
pixelsWide:1024
pixelsHigh:1
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSDeviceRGBColorSpace
bytesPerRow:0
bitsPerPixel:0];

    int x;

for (x = 0; x < 1024; ++x)
{
NSColor *color = [NSColor colorWithDeviceHue:(float)x / 1024.0f saturation:1.0 brightness:1.0 alpha:1.0];
[bitmap setColor:color atX:x y:0];
}

    NSData  *data = [bitmap TIFFRepresentation];

    [data writeToFile:@"/Users/martin/hue.tiff" atomically:YES];

/Martin

_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartz-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartz-dev/email@hidden

This email sent to email@hidden
References: 
 >CIColorMap inputGradientImage? (From: Martin Wennerberg <email@hidden>)
 >Re: CIColorMap inputGradientImage? (From: Frank Doepke <email@hidden>)
 >Re: CIColorMap inputGradientImage? (From: Martin Wennerberg <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.