parse_with_alpha
Description:
Fill in the fields of a color from a string specification.
The string can either one of a large set of standard names. (Taken from the CSS Color [specification](https://www.w3.org/TR/css-color-4/
named-colors), or it can be a hexadecimal value in the form `rgb`, `rrggbb`, `rrrgggbbb` or `
rrrrggggbbbb` where `r`, `g` and `b` are hex digits of the red, green, and blue components of the color, respectively. (White in
the four forms is `fff`, `ffffff`, `fffffffff` and `ffffffffffff`.)
Additionally, parse strings of the form `rgba`, `rrggbbaa`, `rrrrggggbbbbaaaa`, if alpha is
not null, and set alpha to the value specified by the hex digits for `a`. If no alpha component
is found in spec, alpha is set to 0xffff (for a solid color).
Parameters:
| this |
a `PangoColor` structure in which to store the result |
| alpha |
return location for alpha |
| spec |
a string specifying the new color |
Returns:
|
true if parsing of the specifier succeeded, otherwise false |