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141 lines
3.8 KiB
CoffeeScript
141 lines
3.8 KiB
CoffeeScript
Engine::draw =
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_startPath: (surface, options) =>
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surface = @getSurface(surface)
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if not options._is_text ? false
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surface.beginPath()
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return surface
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_finishPath: (surface, options) =>
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if options.stroke ? true
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surface.lineWidth = options.lineWidth?.value ? options.lineWidth ? options.pen?.lineWidth?.value ? options.pen?.lineWidth ? 1
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surface.strokeStyle = options.lineColor ? options.pen?.lineColor ? "black"
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if options._is_text ? false
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surface.strokeText(options.text, options.x, options.y)
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else
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surface.stroke()
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if options.fill ? false
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surface.fillStyle = options.fillColor ? options.pen?.fillColor ? "white"
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if options._is_text ? false
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surface.fillText(options.text, options.x, options.y)
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else
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surface.fill()
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_getTextWidth: (surface, text, options) =>
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@_applyTextContext(surface, options)
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width = surface.measureText(text).width
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surface.restore()
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return width
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_applyTextContext: (surface, options) =>
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font_family = options.font ? "sans-serif"
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font_size = options.size?.value ? options.size ? 16
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font_weight = options.weight ? "normal"
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font_style = options.style ? "normal"
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scale = options.scale?.value ? options.scale ? 1
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surface.save()
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surface.font = "#{font_weight} #{font_style} #{font_size}px '#{font_family}'"
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surface.globalAlpha = options.alpha?.value ? options.alpha ? 1
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surface.scale(scale, scale)
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line: (x1, y1, x2, y2, options = {}, surface = "") =>
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# Ease-able properties
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x1 = x1.value ? x1
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y1 = y1.value ? y1
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x2 = x2.value ? x2
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y2 = y2.value ? y2
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surface = @_startPath(surface, options)
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surface.moveTo(x1, y1)
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surface.lineTo(x2, y2)
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@_finishPath(surface, options)
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rectangle: (x1, y1, x2, y2, options = {}, surface = "") =>
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# Ease-able properties
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x1 = x1.value ? x1
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y1 = y1.value ? y1
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x2 = x2.value ? x2
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y2 = y2.value ? y2
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surface = @_startPath(surface, options)
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surface.rect(x1, y1, x2 - x1, y2 - y1)
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@_finishPath(surface, options)
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boxEllipse: (x1, y1, x2, y2, options = {}, surface = "") =>
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# Ease-able properties
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x1 = x1.value ? x1
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y1 = y1.value ? y1
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x2 = x2.value ? x2
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y2 = y2.value ? y2
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x = (x1 + x2) / 2;
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y = (y1 + y2) / 2;
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rx = (x2 - x1) / 2;
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ry = (y2 - y1) / 2;
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@radiusEllipse(x, y, rx, ry, options, surface)
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radiusEllipse: (x, y, rx, ry, options = {}, surface = "") =>
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# Ease-able properties
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x = x.value ? x
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y = y.value ? y
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rx = rx.value ? rx
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ry = ry.value ? ry
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surface = @_startPath(surface, options)
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step = options.step?.value ? options.step ? 0.1
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if rx == ry
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surface.arc(x, y, rx, 0, 2 * Math.PI, false)
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else
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surface.moveTo(x + rx, y)
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for i in [0 .. (Math.PI * 2 + step)]
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surface.lineTo(x + (Math.cos(i) * rx), y + (Math.sin(i) * ry))
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@_finishPath(surface, options)
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boxPolygon: (x1, y1, x2, y2, sides, options = {}, surface = "") =>
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pass # TODO
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radiusPolygon: (x, y, r, sides, options = {}, surface = "") =>
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pass # TODO
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text: (x, y, text, options = {}, surface = "") =>
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# Ease-able properties
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x = x.value ? x
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y = y.value ? y
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# Defaults
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options.alignment ?= "left"
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options.scale = options.scale?.value ? options.scale ? 1
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options._is_text = true
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options.text = text
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options.y = y
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# Text needs different default color settings from other shapes...
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options.fill ?= true
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options.fillColor ?= "black"
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options.stroke ?= false
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# X coordinate will be calculated depending on alignment
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if alignment == "left"
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options.x = x
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else
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text_width = @_getTextWidth(text, options)
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if alignment == "center"
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options.x = x - ((text_width / 2) * scale * scale)
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else if alignment == "right"
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options.x = x - text_width # FIXME: Possibly broken wrt scale?
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@_startPath(surface, options)
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@_finishPath(surface, options)
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# This is to avoid scale from affecting anything else
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surface.restore() |