Module: Pixelart::Dollar

Defined in:
lib/punkart/dollar.rb

Overview

use/rename to Greenback - why? why not?

Constant Summary collapse

DOLLAR_FRAME =

helpers

Image.read( "#{Module::Punkart.root}/config/dollar.png" )
DOLLAR_PALETTE = 
_gen_palette( '#536140' )

Class Method Summary collapse

Class Method Details

._gen_palette(color) ⇒ Object 



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# File 'lib/punkart/dollar.rb', line 26

def self._gen_palette( color )
   color = Color.parse( color )  if color.is_a?( String )

   h,s,l = Color.to_hsl( color )

   pp h
   pp s
   pp l

   darker = 0.25    ## cut-off colors starting from black
   lighter = 0.05   ## cut-off colors starting from white

   ldiff = (1.0 - darker - lighter)

   puts "  ldiff: #{ldiff}"

  colors = []
  256.times do |i|
     lnew = darker+(ldiff*i / 256.0)
     puts "  #{i} - #{lnew}"
     colors << Color.from_hsl( h, s, lnew)
  end
  colors
end

.frame ⇒ Object 



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# File 'lib/punkart/dollar.rb', line 20

def self.frame()  DOLLAR_FRAME; end

.height ⇒ Object 



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# File 'lib/punkart/dollar.rb', line 22

def self.height() DOLLAR_FRAME.height; end

.palette ⇒ Object 



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# File 'lib/punkart/dollar.rb', line 23

def self.palette() DOLLAR_PALETTE; end

.print(img) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/punkart/dollar.rb', line 5

def self.print( img )
  raise ArgumentError, "sorry only 24x24 supported for now; called on image #{img.width}x#{img.height}"  unless img.width == 24 && img.height == 24

  ## change to greenback color palette
  dollar = Image.new( DOLLAR_FRAME.width, DOLLAR_FRAME.height )
  dollar.compose!( DOLLAR_FRAME )
  dollar.compose!( img.change_palette8bit( DOLLAR_PALETTE ), 16, 0 )
  dollar
end

.width ⇒ Object 



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# File 'lib/punkart/dollar.rb', line 21

def self.width()  DOLLAR_FRAME.width; end