Re: How can I convert Hexadecimal to RGB Color and vice-versa?

[Jacob Carlborg via Digitalmars-d-learn]

On Friday, 16 October 2020 at 20:10:58 UTC, Marcone wrote:
How can I convert Hexadecimal to RGB Color and vice-versa?

Not sure if this is what you're looking for:

struct Color
{
    private uint hex;

    int red()
    out(result; result >= 0 && result <= 255) // assert that the 
result is within bounds
    {
        return (hex & 0xFF0000) >> 16;
    }

    void red(int value)
    in(value >= 0 && value <= 255) // assert that the value is 
within bounds
    {
        hex = (hex & 0x00FFFF) | (value << 16);
    }

    int green()
    out(result; result >= 0 && result <= 255) // assert that the 
result is within bounds
    {
        return (hex & 0x00FF00) >> 8;
    }

    void green(int value)
    in(value >= 0 && value <= 255) // assert that the value is 
within bounds
    {
        hex = (hex & 0xFF00FF) | (value << 8);
    }

    int blue()
    out(result; result >= 0 && result <= 255) // assert that the 
result is within bounds
    {
        return hex & 0x0000FF;
    }

    void blue(int value)
    in(value >= 0 && value <= 255) // assert that the value is 
within bounds
    {
        hex = (hex & 0xFFFF00) | value;
    }

    string toString()
    {
        return format!"Color(red: %s, green: %s, blue: %s)"(red, 
green, blue);
    }
}

void main()
{
    Color color;
    color.red = 255;
    color.green = 143;
    color.blue = 89;

    writeln(color);
}

--
/Jacob Carlborg