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Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Selectively Displaying Video

VDSetKeyColor

The VDSetKeyColor function allows applications to set the key color.

All video digitizer components that support key colors must support this function.

pascal VideoDigitizerError VDSetKeyColor
                                  (VideoDigitizerComponent ci,
                                    long index);

ci

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

index

Specifies the new key color. The value of the index field corresponds to a color in the current color lookup table.

DESCRIPTION

Some video digitizer components support multiple key colors. The VDSetKeyColor function instructs such digitizer components to clear the key color list and insert a single entry for the specified color. Applications can then use the VDAddKeyColor function, described on page 8-84, to place additional colors into the key color list.

RESULT CODES

noErr	0	No error
digiUnimpErr	-2201	Function not supported
qtParamErr	-2202	Invalid parameter value

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