Re: Common standard for defining a color?

On 3 Feb 2004 at 19:23, Bertrand Mansion wrote: > <pear-dev@mocsnik.hu> wrote : > > > Pierre-Alain Joye wrote: > >> integer value for RGB(A), fast and nice :) > >> Besides that, please check Image_Transfrom. It seems most of the > >> stuffs are already there too. And we may use it when possible. > >> Please notice that there is a pending huge commit from Peter :). > > Image_Transform doesn't support other formats such as CMYK and it > > works with only RGB values (web colors like #ffccaa). See the > > apropriate functions in Transform.php itself, and color definitions > > in Driver/ColorDefs.php. > > http://cvs.php.net/cvs.php/pear/Image_Transform/ > > > > Actually I vote on the idea of Stephan Wentz. > > array( > > "cmyk" => array(1,2,3,4), > > "rgb" => array(3,5,4), > > "alpha" => array(1) > > ); > > > > It would be nice if single-values like alpha wouldn't be arrays > > (however it shouldn't be wrong to pass that single value in an > > array..). > > What about rgba(0-255, 0-255, 0-255, 0-100) with a = 100 default ? Well, why 100? To have percentages? I'd favor to have all values of equal size (here 0 to 255 in this case). Wouldn't that make more sense? imagecolorallocatealpha uses 0 to 127 :-((. But others (Pimp, SVG, ...) might even do it completely different. In tools like photoshop etc. afaik a value of 0..255 for alpha is normal, like for any other of those color channels. Stefan