A "monochrome" bitmap is just black-and-white. If a grayscale PNG has
more colors than black or white, it will be loaded the same way as a
color bitmap.
At Fri, 2 Nov 2012 22:15:39 -0400, Harry Spier wrote:
> To clarify one point:
> Is a monochrome bitmap a greyscale bitmap or a black and white bi
To clarify one point:
Is a monochrome bitmap a greyscale bitmap or a black and white bitmap?
I see from the documentation that the form (make-object bitmap% bits
width height) produces a black and white bitmap but for the form I
asked about (shown again below) subject to the restriction Matthew
des
Matthew Flatt wrote:
> A monocrhome bitmap doesn't have an alpha channel, but it you ask for
> its pixels in `just-alpha?' mode, then while pixels generate a 0 alpha
> and black pixels generate a 255 alpha.
>
Thanks Matthew. What confused me was that for:
(send a-dc set-alpha opacity)
opacity i
At Wed, 31 Oct 2012 23:06:39 -0400, Harry Spier wrote:
> Dear list members,
>
> I see from the Racket Drawing Toolkit documentation that there are
> monochrome bitmaps but I'm not clear from the documentation how to
> access and manipulate these monochrome bitmaps.
>
> Specifically:
> 1) If I loa
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