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GetRGB4 -- Inquire value of entry in ColorMap.
value = GetRGB4( colormap, entry )
d0 a0 d0
ULONG GetRGB4(struct ColorMap *, LONG);
Read and format a value from the ColorMap.
colormap - pointer to ColorMap structure
entry - index into colormap
returns -1 if no valid entry
return UWORD RGB value 4 bits per gun right justified
Intuition's DisplayBeep() changes color 0. Reading Color 0 during a
DisplayBeep() will lead to incorrect results.
SetRGB4(), LoadRGB4(), GetColorMap(), FreeColorMap(), <graphics/view.h>
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