Banding/smoothing problem with drawing angled gradients.

[Phi Le]

Hello,

I want to draw angled gradients with multiple sharp transitions using
NSGradient. I am not getting very smooth transitions between the
colors. Please take a look at my attachment to see the problem.   Are
there solutions without having to use NSShading?

Thanks,

Phi


<code>
- (void) drawRect: (NSRect) rect {
       [[NSGraphicsContext currentContext] setShouldAntialias:YES];
       float locs[8] = {0.0, 0.25, 0.3, 0.35, 0.5, 0.6, 0.7, 1.0 };
       NSMutableArray * colors = [[NSMutableArray alloc] init];

       [colors addObject: [NSColor blackColor]];

       [colors addObject: [NSColor blackColor]];
       [colors addObject: [NSColor greenColor]];
       [colors addObject: [NSColor blackColor]];

       [colors addObject: [NSColor blackColor]];
       [colors addObject: [NSColor redColor]];
       [colors addObject: [NSColor blackColor]];

       [colors addObject: [NSColor blackColor]];

       NSColorSpace * space = [NSColorSpace genericRGBColorSpace];
       NSGradient * gradient = [[NSGradient alloc] initWithColors:colors
atLocations:&locs colorSpace: space];

       float angle = 0;
       for(int r = 0; r < 5; r++) {
               for(int c = 0; c < 3; c++) {
                       [gradient drawInRect:NSMakeRect(c*200, r*90,
180, 80) angle: angle];
                       angle += 5;
               }
       }
}
</code>

<<attachment: gradients.png>>

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