From: Alex Fenton <alex@...>
Date: 2008-04-02T17:15:16+09:00
Subject: Re: wxruby: paint monochrome bitmaps in other colors

crystalbrittle@gmail.com wrote:
> Is there an easy way to change the black and white pixels in a
> monochrome bitmap to arbitrary color values? I just want to load in a
> monochrome gif (or png) and display it in a window with, say, orange
> for the black pixels, and yellow for the white

Set the drawing device context's text_foreground and text_background to 
be the colours you want, then a mono bitmap will be drawn in those 
colours; http://wxruby.rubyforge.org/doc/dc.html#DC_drawbitmap

   bitmap.depth = 1
   dc.text_foreground = Wx::Colour.new(255, 128, 0)
   dc.text_background = Wx::Colour.new(255, 255, 0)
   dc.draw_bitmap(bitmap, 0, 0, false)

wxRuby specific questions are usually better posted at 
http://rubyforge.org/mailman/listinfo/wxruby-users

alex