obsolete.ChilliProject/vendor/plugins/rfpdf/lib/fpdf/fpdf_eps.rb

140 lines
4.3 KiB
Ruby

# Information
#
# PDF_EPS class from Valentin Schmidt ported to ruby by Thiago Jackiw (tjackiw@gmail.com)
# working for Mingle LLC (www.mingle.com)
# Release Date: July 13th, 2006
#
# Description
#
# This script allows to embed vector-based Adobe Illustrator (AI) or AI-compatible EPS files.
# Only vector drawing is supported, not text or bitmap. Although the script was successfully
# tested with various AI format versions, best results are probably achieved with files that
# were exported in the AI3 format (tested with Illustrator CS2, Freehand MX and Photoshop CS2).
#
# ImageEps(string file, float x, float y [, float w [, float h [, string link [, boolean useBoundingBox]]]])
#
# Same parameters as for regular FPDF::Image() method, with an additional one:
#
# useBoundingBox: specifies whether to position the bounding box (true) or the complete canvas (false)
# at location (x,y). Default value is true.
#
# First added to the Ruby FPDF distribution in 1.53c
#
# Usage is as follows:
#
# require 'fpdf'
# require 'fpdf_eps'
# pdf = FPDF.new
# pdf.extend(PDF_EPS)
# pdf.ImageEps(...)
#
# This allows it to be combined with other extensions, such as the bookmark
# module.
module PDF_EPS
def ImageEps(file, x, y, w=0, h=0, link='', use_bounding_box=true)
data = nil
if File.exists?(file)
File.open(file, 'rb') do |f|
data = f.read()
end
else
Error('EPS file not found: '+file)
end
# Find BoundingBox param
regs = data.scan(/%%BoundingBox: [^\r\n]*/m)
regs << regs[0].gsub(/%%BoundingBox: /, '')
if regs.size > 1
tmp = regs[1].to_s.split(' ')
@x1 = tmp[0].to_i
@y1 = tmp[1].to_i
@x2 = tmp[2].to_i
@y2 = tmp[3].to_i
else
Error('No BoundingBox found in EPS file: '+file)
end
f_start = data.index('%%EndSetup')
f_start = data.index('%%EndProlog') if f_start === false
f_start = data.index('%%BoundingBox') if f_start === false
data = data.slice(f_start, data.length)
f_end = data.index('%%PageTrailer')
f_end = data.index('showpage') if f_end === false
data = data.slice(0, f_end) if f_end
# save the current graphic state
out('q')
k = @k
# Translate
if use_bounding_box
dx = x*k-@x1
dy = @hPt-@y2-y*k
else
dx = x*k
dy = -y*k
end
tm = [1,0,0,1,dx,dy]
out(sprintf('%.3f %.3f %.3f %.3f %.3f %.3f cm',
tm[0], tm[1], tm[2], tm[3], tm[4], tm[5]))
if w > 0
scale_x = w/((@x2-@x1)/k)
if h > 0
scale_y = h/((@y2-@y1)/k)
else
scale_y = scale_x
h = (@y2-@y1)/k * scale_y
end
else
if h > 0
scale_y = $h/((@y2-@y1)/$k)
scale_x = scale_y
w = (@x2-@x1)/k * scale_x
else
w = (@x2-@x1)/k
h = (@y2-@y1)/k
end
end
if !scale_x.nil?
# Scale
tm = [scale_x,0,0,scale_y,0,@hPt*(1-scale_y)]
out(sprintf('%.3f %.3f %.3f %.3f %.3f %.3f cm',
tm[0], tm[1], tm[2], tm[3], tm[4], tm[5]))
end
data.split(/\r\n|[\r\n]/).each do |line|
next if line == '' || line[0,1] == '%'
len = line.length
# next if (len > 2 && line[len-2,len] != ' ')
cmd = line[len-2,len].strip
case cmd
when 'm', 'l', 'v', 'y', 'c', 'k', 'K', 'g', 'G', 's', 'S', 'J', 'j', 'w', 'M', 'd':
out(line)
when 'L':
line[len-1,len]='l'
out(line)
when 'C':
line[len-1,len]='c'
out(line)
when 'f', 'F':
out('f*')
when 'b', 'B':
out(cmd + '*')
end
end
# restore previous graphic state
out('Q')
Link(x,y,w,h,link) if link
end
end