pdfsurface.lua

local argcheck = require 'argcheck'
local class = require 'class'
local ffi = require 'ffi'
local cairo = require 'cairo.env'
local C = cairo.C

local PDFImageSurface = class.new('cairo.PDFImageSurface', 'cairo.ImageSurface')
cairo.PDFImageSurface = PDFImageSurface

PDFImageSurface.__init = argcheck{
   {name="self", type="cairo.PDFImageSurface"},
   {name="filename", type="string"},
   {name="width_in_points", type="number"},
   {name="height_in_points", type="number"},
   call =
      function(self, filename, width_in_points, height_in_points)
         self.C = C.cairo_pdf_surface_create(filename, width_in_points, height_in_points)
         ffi.gc(self.C, C.cairo_surface_destroy)
         return self
      end
}

PDFImageSurface.restrictToVersion = argcheck{
   {name="self", type="cairo.PDFImageSurface"},
   {name="version", type="string"},
   call =
      function(self, version)
         C.cairo_pdf_surface_restrict_to_version(self.C, cairo.enums.PDFVersion[version])
      end
}

PDFImageSurface.getVersions = argcheck{
   {name="self", type="cairo.PDFImageSurface"},
   call =
      function(self, version)
         local versions_p = ffi.new('cairo_pdf_version_t*[1]')
         local num_versions_p = ffi.new('int[1]')
         local versions = {}
         C.cairo_pdf_get_versions(versions_p, num_versions_p)
         for i=1,num_versions_p[0] do
            table.insert(versions, ffi.string(versions_p[i-1]))
         end
         return versions
      end
}