From: Roeland Moors <roelandmoors@...>
Date: 2004-08-29T20:26:07+09:00
Subject: rmagick crash?

I use rmagick to transform an image.
This works nice for 1 or a couple or images, but when I do more
images I have problems.

After a couple of images my program just stops with the output
'killed'. No error message, nothing.

Then I updated to the latest version of rmagick en tried again.
It did more images, but then my pc completely crashed!
(I'm not using windows :-)

What could cause these problems?
Am I doing something stupid?

Here are pieces of the code:

# convert a lot of pictures
@photolist.each do |photo|
    photo.convert()
end
                    
class Photo
    def convert(preview = false)
        img = Magick::ImageList.new(@name)

        width = $format['width']
        height = $format['height']
        top = $format['border_top']
        left = $format['border_left']

        if preview
            top = top / (height/200)
            left = left / (width/300)
            width = 300
            height = 200
        end

        # rotate to landscape
        img.rotate!(90) if img.rows > img.columns

        geometry = "#{width}x#{height}"

        # resize current image
        img.change_geometry!(geometry) do |cols, rows|
            if preview
                img.scale!(cols, rows)
                #img.thumbnail!(cols, rows)
            else
                img.resize!(cols, rows)
            end
        end

        # create an empty image 
        dest = Magick::ImageList.new
        dest.new_image(width + 2*left, height + 2*top) do
            self.background_color = 'black'
        end

        # create text on photo
        text = Magick::Draw.new
        text.gravity = Magick::NorthWestGravity
        text.rotation = 90

        # date
        ps = 2.5 * width /100
        text.pointsize = ps
        pos = width+left-ps
        text.annotate(dest, ps, height, pos, top, @date) do
            self.fill = 'white'
        end
        ps = 6 * width /100
        text.pointsize = ps
        pos = pos-ps
        text.annotate(dest, ps, height, pos, top, @description) do
            self.fill = 'white'
        end

        # merge images
        dest = dest.composite(img, left, top, Magick::InCompositeOp)

        dest.write($filename)
        $filename
    end

end


-- 
Roeland