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Jul 29th, 2014
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  1. {ByteCode} = Raid.Render
  2.  
  3. namespace Raid:Render:Primitive:
  4.   class Path
  5.     @[cache = $private('cache')] = {}
  6.  
  7.     CONTEXT           = '2d'
  8.     CANVAS            = 'canvas'
  9.  
  10.  
  11.     # internal properties
  12.  
  13.     parse             = $private 'parse'
  14.     parseWidth        = $private 'parseWidth'
  15.     parseHeight       = $private 'parseHeight'
  16.     bytecode          = $private 'bytecode'
  17.     buffer            = $private 'buffer'
  18.  
  19.     # properies
  20.     background        = $private 'background'
  21.     color             = $private 'color'
  22.     stroke            = $private 'stroke'
  23.     rotate            = $private 'rotate'
  24.  
  25.     # initial properties
  26.     @::[background]   = undefined
  27.     @::[color]        = undefined
  28.     @::[stroke]       = undefined
  29.     @::[buffer]       = {
  30.       width:  0
  31.       height: 0
  32.     }
  33.     @::[rotate]       = {
  34.       degress: 0
  35.       x: 0
  36.       y: 0
  37.     }
  38.  
  39.  
  40.  
  41.     # @private
  42.     @::[parseWidth] = (w) ->
  43.       @[buffer].width = w if @[buffer].width < w
  44.       @canvas.width = @[buffer].width
  45.       @
  46.  
  47.     # @private
  48.     @::[parseHeight] = (h) ->
  49.       @[buffer].height = h if @[buffer].height < h
  50.       @canvas.height = @[buffer].height
  51.       @
  52.  
  53.     # @private
  54.     @::[parse] = (width, height) ->
  55.       @[parseWidth](width)
  56.       @[parseHeight](height)
  57.       @
  58.  
  59.     # @private
  60.     @::[bytecode] = ->
  61.       @bc.render(@context)
  62.       @
  63.  
  64.  
  65.     constructor: ->
  66.       @bc      = (new ByteCode(@paths))
  67.       @canvas  = document.createElement CANVAS
  68.       @context = @canvas.getContext CONTEXT
  69.  
  70.  
  71.     # @property
  72.     background: (bg) ->
  73.       @[background] = bg
  74.       do @flush
  75.       @
  76.  
  77.     # @property
  78.     color: (clr) ->
  79.       @[color] = clr
  80.       do @flush
  81.       @
  82.  
  83.     # @property
  84.     stroke: (size) ->
  85.       @[stroke] = size
  86.       do @flush
  87.       @
  88.  
  89.     # @property
  90.     rotate: (degress) ->
  91.       @[rotate].degress = degress
  92.       do @flush
  93.       @
  94.  
  95.     # @helper
  96.     buffer: -> @[buffer]
  97.  
  98.     # @helper
  99.     flush: ->
  100.       @constructor[cache][@bc.hash()] = undefined
  101.  
  102.     # @helper
  103.     cache: (name, val) ->
  104.       if val?
  105.         @constructor[cache][name] = val
  106.       else
  107.         val = @constructor[cache][name]
  108.       val
  109.  
  110.     # @helper
  111.     define: (context, name, value) ->
  112.       do (context, name) =>
  113.         pName = $private name
  114.         context.__defineSetter__ name, (nv) => @[pName] = nv
  115.         context.__defineGetter__ name, => @[pName]
  116.         @[pName] = value
  117.       @
  118.  
  119.     # @bytecode
  120.     line: (x, y) ->
  121.       @bc.instruction line: [x, y]
  122.       @[parse] x, y
  123.       @
  124.  
  125.     # @bytecode
  126.     quadratic: (curveX, curveY, x, y) ->
  127.       @bc.instruction quadratic: [curveX, curveY, x, y]
  128.       @[parse] x, y
  129.       @
  130.  
  131.     # @bytecode
  132.     bezier: (curveX, curveY, curve2X, curve2Y, x, y) ->
  133.       @bc.instruction bezier: [curveX, curveY, curve2X, curve2Y, x, y]
  134.       @[parse] x, y
  135.       @
  136.  
  137.     # @bytecode
  138.     arc: (curveX, curveY, x, y, radius) ->
  139.       @bc.instruction arc: [curveX, curveY, x, y, radius]
  140.       @[parse] x, y
  141.       @
  142.  
  143.     # @bytecode
  144.     move: (x, y) ->
  145.       @bc.instruction move: [x, y]
  146.       @[parse] x, y
  147.       @
  148.  
  149.  
  150.     # @render
  151.     render: ->
  152.       return value if value = @cache(@bc.hash())
  153.  
  154.       @context.save()
  155.       @context.beginPath()
  156.       @context.clearRect 0, 0, @[buffer].width, @[buffer].height
  157.  
  158.       @context.fillStyle   = @[background] if @[background]?
  159.       @context.strokeStyle = @[color] if @[color]?
  160.       @context.lineWidth   = @[stroke] if @[stroke]?
  161.  
  162.       @context.rotate(@[rotate].degress * Math.PI / 180)
  163.       do @[bytecode]
  164.  
  165.  
  166.       @context.fill() if @[background]?
  167.       @context.stroke() if @[color]?
  168.  
  169.       @context.closePath()
  170.       @context.restore()
  171.  
  172.       @cache(@bc.hash(), @canvas)
  173.  
  174.     # @render
  175.     draw: (ctx, left = 0, top = 0, w, h) ->
  176.       w = @[buffer].width  unless w?
  177.       h = @[buffer].height unless h?
  178.       ctx.drawImage @render(), left, top, w, h
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