1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
require 'rvg/rvg'
def example(cols, rows)
rvg = Magick::RVG.new(cols, rows) do |canvas|
canvas.background_fill = 'white'
canvas.desc = <<-END_DESC
Example - uses the viewBox attribute to automatically create an initial
user coordinate system which causes the graphic to scale to fit into
the viewport no matter what size the viewport is.
END_DESC
canvas.viewbox(0, 0, 1500, 1000)
canvas.preserve_aspect_ratio('none')
# This rectangle goes from (0,0) to (1500,1000) in user space.
# Because of the viewBox attribute above,
# the rectangle will end up filling the entire area
# reserved for the SVG content.
canvas.rect(1500, 1000).styles(fill: 'yellow', stroke: 'blue', stroke_width: 12)
# A large, red triangle
canvas.path('M 750,100 L 250,900 L 1250,900 z').styles(fill: 'red')
# A text string that spans most of the viewport
canvas.text(100, 600, 'Stretch to fit').styles(font_size: 200, font_style: 'normal', font_weight: 'normal', font_family: 'Verdana')
end
rvg.draw
end
example(300, 200).write('view_box_300x200.gif')
example(150, 200).write('view_box_150x200.gif')
|
