Created
October 10, 2010 13:03
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| require 'rubygems' | |
| require 'RMagick' | |
| require 'rvg/rvg' | |
| include Magick | |
| require 'picture' | |
| RVG::dpi = 72 | |
| class PictureGenerator | |
| def initialize(input, add_text=true, blur_amount=2) | |
| @input = input | |
| @picture = Picture.new(@input) | |
| @size = @picture.size | |
| @add_text = add_text | |
| @blur_amount = blur_amount | |
| end | |
| def generate_picture | |
| rvg = generate_rvg | |
| rvg = render_rvg(rvg) | |
| rvg = blur_rvg(rvg, @blur_amount) unless @blur_amount == 0 | |
| save_picture(rvg) | |
| message 'Done!' | |
| end | |
| private | |
| def generate_rvg | |
| message "Generating picture \"#{@input}\" containing #{@picture.boxes.size} boxes, size #{@size}x#{@size} ..." | |
| RVG.new(@size, @size).viewbox(0, 0, @size, @size) do |canvas| | |
| add_background(canvas) | |
| add_boxes(canvas) | |
| add_text(canvas) if @add_text | |
| end | |
| end | |
| def add_background(canvas) | |
| canvas.background_fill = @picture.background_colour | |
| end | |
| def add_boxes(canvas) | |
| @picture.boxes.each do |box| | |
| add_box(canvas, box) | |
| end | |
| end | |
| def add_box(canvas, box) | |
| canvas.g.translate(box.x, box.y) do |shape| | |
| shape.rect(box.width, box.height).styles( | |
| :fill=> box.colour, | |
| :fill_opacity => box.opacity, | |
| :stroke => box.stroke_colour, | |
| :stroke_width => box.stroke_width, | |
| :stroke_opacity => box.stroke_opacity) | |
| end | |
| end | |
| def add_text(canvas) | |
| message "Adding input text ..." | |
| canvas.text(@size / 2, @size - 100) do |title| | |
| title.tspan(@input).styles( | |
| :text_anchor => 'middle', | |
| :font_size => @size / 7, | |
| :font_family => 'helvetica', | |
| :font_weight => 900, | |
| :fill => 'white', | |
| :stroke => 'black', | |
| :stroke_width => @size / 100, | |
| :opacity => 0.2, | |
| :stroke_opacity => 0.05) | |
| end | |
| end | |
| def render_rvg(rvg) | |
| message "Rendering ..." | |
| rvg.draw | |
| end | |
| def blur_rvg(rvg, amount) | |
| message "Adding blur with radius #{amount} ..." | |
| rvg.blur_image(amount, amount) | |
| end | |
| def save_picture(rvg) | |
| message 'Saving picture ...' | |
| rvg.write("output/#{@input.gsub(/[^\w|#|@|_]+/, '-')}.png") | |
| end | |
| def message(msg) | |
| puts | |
| puts msg | |
| end | |
| end |
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