1  #import <CoreGraphics/CGColorSpace.h>
 2  #import <CoreGraphics/CGGeometry.h>
 3  #import <CoreGraphics/CoreGraphicsExport.h>
 4  
 5  typedef struct CGGradient *CGGradientRef;
 6  
 7  typedef CF_ENUM(uint32_t, CGGradientDrawingOptions)
 8  {
 9      kCGGradientDrawsBeforeStartLocation = 0x01,
10      kCGGradientDrawsAfterEndLocation = 0x02
11  };
12  
13  CGGradientRef CGGradientCreateWithColorComponents(CGColorSpaceRef colorSpace,
14                                                    const CGFloat components[],
15                                                    const CGFloat locations[],
16                                                    size_t count);
17  CGGradientRef CGGradientCreateWithColors(CGColorSpaceRef colorSpace,
18                                           CFArrayRef colors,
19                                           const CGFloat locations[]);
20  
21  void CGGradientRelease(CGGradientRef self);
22  CGGradientRef CGGradientRetain(CGGradientRef self);