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      1 --
      2 -- Copyright 2016 Google Inc.
      3 --
      4 -- Use of this source code is governed by a BSD-style license that can be
      5 -- found in the LICENSE file.
      6 --
      7 
      8 -- Dashed path scraping script.
      9 -- This script is designed to count the total number of dashes in a dashed path
     10 -- by computing the fill path and then counting how many individual segments are
     11 -- inside the resulting fill path.
     12 
     13 dashes = 0
     14 
     15 pathPieces = {}
     16 
     17 function sk_scrape_startcanvas(c, fileName)
     18 end
     19 
     20 function sk_scrape_endcanvas(c, fileName)
     21 end
     22 
     23 function sk_scrape_accumulate(t)
     24     local paint = t.paint
     25     if paint then
     26         local pe = paint:getPathEffect()
     27         if pe then
     28             if t.verb == "drawPath" and pe:asADash() then
     29                 dashes = dashes + 1
     30                 pathPieces[dashes] = 0
     31 
     32                 local path = t.path
     33                 local fillpath = paint:getFillPath(path)
     34                 local verbs = fillpath:getVerbs()
     35                 for _, verb in ipairs(verbs) do
     36                     if verb == "move" then
     37                        pathPieces[dashes] = pathPieces[dashes] + 1
     38                     end
     39                 end
     40             end
     41         end
     42     end
     43 end
     44 
     45 -- We mulitply by two because for each segment of the dash, we do two measurements:
     46 -- One for the beginning and one for the end of each dash.
     47 function sk_scrape_summarize() 
     48     local pieces5 = 0;
     49     local pieces10 = 0;
     50     for _, p in ipairs(pathPieces) do
     51         local pieces = 2*p
     52         if pieces < 5 then
     53             pieces5 = pieces5 + 1
     54         end
     55         if pieces > 5 and pieces < 10 then
     56             pieces10 = pieces10 + 1
     57         end
     58     end
     59     io.write(string.format("%d %d %d\n", 2*dashes, pieces5, pieces10))
     60 end
     61