Corona Text Shadow and Glow

This is the source code for the tutorial at http://prairiewest.net/blog/2013/12/text-shadow-glow-corona-sdk/

----- ${{\color{red}Deprecated}}$ -----

There is a better library for making outlined text in Solar2D.

Please see: https://github.com/ponywolf/ponystroke

It's better because it does not use display.capture() with a delay.

----- ${{\color{red}Deprecated}}$ -----

Sample usage

See the file main.lua for a more complete sample.

  local styledText = require("styledText")
  local myText

  local objectReady = function(o)
      if o.id then
      	print("Object is ready: " .. o.id)
      end
  end

  myText = styledText.newText({
	text = "Hello World", 
	textColor = {255,255,255,255},
	x = 160,
	y = 200, 
	font = "Arial", 
	size = 24,
	id = "myText1",
	shadowOffset = 2,
	shadowColor = {0,0,0,80},
	glowOffset = 1,
	glowColor = {120,0,0,180},
	callback = objectReady
  })

Parameters

List of all parameters that can be passed in:

   text:      the string to be displayed [default: " "]
   textColor: the color of the text [default: white]
   size:      the text size [default: 24 points]
   font:      the name of the font face to use [default: native.systemFontBold]

   width:     the max width (in pixels); this is needed if you want multi-line text [default: nil]
   align:     a string describing text alignment when width is supplied [default: "left"]

   x:       the x coordinate [default: 160]
   y:       the y coordinate [default: 240]
   anchorX: the X anchor (0.0 - 1.0) [default: 0.5]
   anchorY: the Y anchor (0.0 - 1.0) [default: 0.5]

   shadowColor:  the color of the shadow effect [default: black (0,0,0,0.5)]
   shadowOffset: the distance that the shadow is offset from the text [default: 0]
   blurShadow:   0=do not blur the shadow; 1=blur the shadow [default: 1]

   glowColor:  the color of the glow around the text [default: grey (0.5,0.5,0.5,1.0)]
   glowOffset: the width of the glow around the text, in pixels [default: 0]
   blurGlow    0=do not blur the glow; 1=blur the glow [default: 1]

   embossDepth: integer, number of pixels to raise or lower emboss effect. Negative is raised. [default: 0]

   id: if supplied, the final object will be assigned this id
   callback: if supplied, this function will be called after the text is rendered, 
       with the final output as the argument

All colors can be specified using floating point (0.0-1.0) or old style integer (0-255)

Removal

To remove the text once created, you must have kept a reference to it:

	myText:removeSelf()

Copyright 2013 Todd Trann

LICENSE

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.