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                                           280
CHAPTER 4                                                                      Graphics



formation function that converts from the two tint components to colors in the
alternate CalRGB color space.

Example 4.17

  10 0 obj                                              % Color space
     [ /Indexed
           [ /DeviceN
                 [ /Cyan /Black ]
                 /DeviceCMYK
                 15 0 R
           ]
           255
           < 6605 6806 6907 6B09 6C0A … >
     ]
  endobj

  15 0 obj                                              % Tint transformation function
      << /FunctionType 4
           /Domain [ 0.0 1.0 0.0 1.0 ]
           /Range [ 0.0 1.0 0.0 1.0 0.0 1.0 0.0 1.0 ]
           /Length 16
      >>
  stream
      { 0 0 3 −1 roll }
  endstream
  endobj

Example 4.18

  30 0 obj                                              % Color space
     [ /Indexed
           [ /DeviceN
                 [ /Black /Gold ]
                 [ /CalRGB
                         << /WhitePoint [ 1.0 1.0 1.0 ]
                            /Gamma [ 2.2 2.2 2.2 ]
                         >>
                 ]
                 35 0 R                                 % Tint transformation function
           ]
           255
           … Lookup table …
     ]
  endobj

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