From: dc <lister@...>
Date: 2007-01-28T03:12:39+09:00
Subject: transparent text with rmagick?

hi -

(this maybe more an imagemagick q that a ruby one, but here goes ..)

using rmagick / I have a small script for generating some type, but I
cannot get the type to come out as transparent png - it comes out just
on solid white .

does this have to be done with masks and compositing? there are a
number of methods that look like they should work (transparent_color
etc), but dont seem to...

is the library broken or am i doing something wrong?

tx,

/dc

---------
require 'rubygems'
require "RMagick"
include Magick

outfile = "output/matte.png"

drawObj = Magick::Draw.new
drawObj.font = './fonts/Ghoul.ttf'
drawObj.pointsize=30
drawObj.fill = '#44ff00'

buffer = Magick::Image.new(250,100)
drawObj.text(20,50, "hello world")
drawObj.matte(3,3,PaintMethod::ReplaceMethod)
drawObj.draw(buffer)
buffer.opacity = 1
buffer.transparent_color = '#000000'
buffer.matte = true
buffer.write(outfile)

system("open #{outfile}")



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      David "DC" Collier
mailto:dc@pikkle.com
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