Color.from_string

Parses a string definition of a color, filling the red, green, blue and alpha fields of color.

The color is not allocated.

The format of str can be either one of:

• a standard name (as taken from the X11 rgb.txt file)
• an hexadecimal value in the form: `rgb`, `rrggbb`, `rgba`, or `rrggbbaa`
• a RGB color in the form: `rgb(r, g, b)`
• a RGB color in the form: `rgba(r, g, b, a)`
• a HSL color in the form: `hsl(h, s, l)` -a HSL color in the form: `hsla(h, s, l, a)`

where 'r', 'g', 'b' and 'a' are (respectively) the red, green, blue color intensities and the opacity. The 'h', 's' and 'l' are ( respectively) the hue, saturation and luminance values.

In the rgb and rgba formats, the 'r', 'g', and 'b' values are either integers between 0 and 255, or percentage values in the range between 0% and 100%; the percentages require the '%' character. The 'a' value, if specified, can only be a floating point value between 0.0 and 1.0.

In the hls and hlsa formats, the 'h' value (hue) is an angle between 0 and 360.0 degrees; the 'l' and 's' values (luminance and saturation) are percentage values in the range between 0% and 100%. The 'a' value, if specified, can only be a floating point value between 0.0 and 1.0.

Whitespace inside the definitions is ignored; no leading whitespace is allowed.

If the alpha component is not specified then it is assumed to be set to be fully opaque.

Parameters:

str	a string specifiying a color
color	return location for a Color

Returns:

true if parsing succeeded, and false otherwise