Inside Macintosh: QuickTime Components /

Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Controlling Analog Video

VDGetHue

The VDGetHue function returns the current hue value. Hue is similar to the tint control on a television, and it is specified in degrees with complementary colors set 180 degrees apart (red is 0, green is +120, and blue is -120). Video digitizer components support hue values that range from 0 (-180 shift in hue) to 65,535 (+179 shift in hue),
where 32,767 represents a 0 shift in hue.

pascal VideoDigitizerError VDGetHue (VideoDigitizerComponent ci,
                                     unsigned short *hue);

ci

Specifies the video digitizer component for the request. Applications obtain this reference from the Component Manager's OpenComponent function.

hue

Contains a pointer to an integer that is to receive the current hue value. The video digitizer component places the hue value into the field referred to by this parameter.

RESULT CODES

noErr	0	No error
digiUnimpErr	-2201	Function not supported

SEE ALSO

Your application can set the hue value by calling the VDSetHue function (described
in the previous section). To obtain the recommended hue value, your application can call the VDGetVideoDefaults function (described on page 8-66).

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