PixelColor_EncodeTriplet ( x ; y ; z )

Encodes the values, used by the PixelColor() function

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Andrea Niro - Show more from this author

Sample input:

1. PixelColor_EncodeTriplet ( 0; 0; 0 )
2. PixelColor_EncodeTriplet ( 255; 255; 255 )
3. PixelColor_EncodeTriplet ( 255; 163; 45 )
4. PixelColor_EncodeTriplet ( 16; 255; 255 )

Sample output:

1. AAAA
2. ////
3. /6Mt
4. EP//

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Let ( [
	_x	=	x;
	_y	=	y;
	_z	=	z;

	_pos1	=	BitwiseShR ( _x; 2 );

	_pos2a	=	BitwiseShL ( BitwiseAND ( _x; 3 ); 4 );
	_pos2b	=	BitwiseShR ( _y; 4 );
	_pos2	=	BitwiseOR ( _pos2a; _pos2b );

	_pos3a	=	BitwiseShL ( BitwiseAND ( _y; 15 ); 2 );
	_pos3b	=	BitwiseShR ( _z; 6 );
	_pos3	=	BitwiseOR ( _pos3a; _pos3b );

	_pos4	=	BitwiseAND ( _z; 63 );

	_string	=	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	_char1	=	Middle ( _string; _pos1 + 1; 1 );
	_char2	=	Middle ( _string; _pos2 + 1; 1 );
	_char3	=	Middle ( _string; _pos3 + 1; 1 );
	_char4	=	Middle ( _string; _pos4 + 1; 1 )
];
	_char1 & _char2 & _char3 & _char4
)

The function acts as a support to the main function, PixelColor (https://www.briandunning.com/cf/)

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Dependencies:
BitwiseAND ( x; y ) [ https://www.briandunning.com/cf/2461 ]
BitwiseOR ( x; y ) [ https://www.briandunning.com/cf/2462 ]
BitwiseShL ( x; y ) [ https://www.briandunning.com/cf/2465 ]
BitwiseShR ( x; y ) [ https://www.briandunning.com/cf/2466 ]

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

PixelColor_EncodeTriplet ( x ; y ; z )

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