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32 lines
773 B
CoffeeScript
32 lines
773 B
CoffeeScript
###
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PDFImage - embeds images in PDF documents
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By Devon Govett
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###
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fs = require 'fs'
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Data = require './data'
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JPEG = require './image/jpeg'
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PNG = require './image/png'
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class PDFImage
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@open: (filename) ->
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@contents = fs.readFileSync filename
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return unless @contents
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@data = new Data @contents
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@filter = null
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# load info
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data = @data
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firstByte = data.byteAt(0)
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if firstByte is 0xFF and data.byteAt(1) is 0xD8
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return new JPEG(data)
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else if firstByte is 0x89 and data.stringAt(1, 3) is "PNG"
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return new PNG(data)
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else
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throw new Error 'Unknown image format.'
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module.exports = PDFImage |