#ifdef __APPLE__
#include <ApplicationServices/ApplicationServices.h>
#else
#include <CoreGraphics/CoreGraphics.h>
#endif

#include <Foundation/Foundation.h>

void draw(CGContextRef ctx, CGRect rect)
{
  CGContextScaleCTM(ctx, rect.size.width, rect.size.height);

  CGColorSpaceRef AdobeRGB, sRGB;
   
  AdobeRGB = CGColorSpaceCreateWithName(kCGColorSpaceAdobeRGB1998);
  sRGB = CGColorSpaceCreateWithName(kCGColorSpaceSRGB);

  const CGFloat full[4] = {0.0, 1.0, 0.0, 1.0};
  const CGFloat partial[4] = {0.0, 0.75, 0.0, 1.0};
  
  CGColorRef adobe1, adobe2, srgb1, srgb2;
  adobe1 = CGColorCreate(AdobeRGB, full);
  adobe2 = CGColorCreate(AdobeRGB, partial);
  srgb1 = CGColorCreate(sRGB, full);
  srgb2 = CGColorCreate(sRGB, partial);

  /* AdobeRGB 100% green | sRGB 100% green
     --------------------+----------------
     AdobeRGB 75% green  | sRGB 75% green  */
  
  CGContextSetFillColorWithColor(ctx, adobe1);
  CGContextFillRect(ctx, CGRectMake(0, 0.5, 0.5, 0.5));
  CGContextSetFillColorWithColor(ctx, srgb1);
  CGContextFillRect(ctx, CGRectMake(0.5, 0.5, 0.5, 0.5));

  CGContextSetFillColorWithColor(ctx, adobe2);  
  CGContextFillRect(ctx, CGRectMake(0, 0, 0.5, 0.5));
  CGContextSetFillColorWithColor(ctx, srgb2);
  CGContextFillRect(ctx, CGRectMake(0.5, 0, 0.5, 0.5));
}