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47 lines
1.3 KiB
Ruby
47 lines
1.3 KiB
Ruby
class AsciicastImageGenerator
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PIXEL_DENSITY = 2
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attr_reader :template_renderer, :rasterizer, :image_inspector
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def initialize(template_renderer, rasterizer = Rasterizer.new, image_inspector = ImageInspector.new)
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@template_renderer = template_renderer
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@rasterizer = rasterizer
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@image_inspector = image_inspector
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end
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def generate(asciicast)
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Dir.mktmpdir do |dir|
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asciicast_url = asciicast.data.absolute_url
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image_path = "#{dir}/#{asciicast.image_filename}"
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time = asciicast.snapshot_at || asciicast.duration / 2
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theme = AsciicastDecorator.new(asciicast).theme_name
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rasterizer.generate_image(asciicast_url, image_path, time, PIXEL_DENSITY, theme)
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image_width, image_height = get_size(image_path)
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update_asciicast(asciicast, image_path, image_width, image_height)
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end
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end
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private
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def get_size(image_path)
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width, height = image_inspector.get_size(image_path)
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# "display" size is 1/PIXEL_DENSITY of the actual one
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[width / PIXEL_DENSITY, height / PIXEL_DENSITY]
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end
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def update_asciicast(asciicast, image_path, image_width, image_height)
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File.open(image_path) do |f|
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asciicast.image = f
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end
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asciicast.image_width = image_width
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asciicast.image_height = image_height
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asciicast.save!
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end
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end
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