On Fri, Feb 22, 2013 at 4:40 PM, ro...@racket-lang.org wrote:
+ The list of colors is obtained by drawing the image on a white
+ background and then reading off the colors of the pixels that were drawn.
Is there a particular reason to choose white, as opposed to clear, for
the background in
No, I don't think it does. The drawing operation is called over and it
takes two colors (rgb, say), and an alpha and produces a color (rgb). So
you always start with some solid color in the background and draw the shape
on top of it, resulting in another color that some other shape can be drawn
on
Ok, that makes sense.
I think you should maybe add the word floor in the nitty-gritty
documentation. You might also link from that discussion in the docs
to the Cairo docs here: http://cairographics.org/operators/ .
However, I can't find anything where they say they round down rather
than to
Well, I didn't try to explain _that_ part of the issue here (what I called
b in my message on the audit trail). It is much more complex and based
more on conjecture, so I'm hesitant to even try especially when the
existing discussion covers a more general, related problem that is likely
to satisfy
4 matches
Mail list logo
