All functions
          
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           create_style_string()  
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        Create stryle strings for the given attritute or set of attributes  | 
      
        
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           fill_style()  
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        Construct a vector of styles related to 'fill'  | 
      
        
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           filter_style()  
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        Construct a vector of styles related to 'filter'  | 
      
        
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           font_style()  
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        Construct a vector of styles related to 'font'  | 
      
        
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           glue_two()  
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        Custom version of glue which rounds all numerics to 2 decimals  | 
      
        
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           is_black()  
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        Is the colour black?  | 
      
        
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           is_transparent()  
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        Is the colour transparent?  | 
      
        
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           is_white()  
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        Is the colour white?  | 
      
        
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           rgba_to_alpha()  
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        Calcuate the alpha value from the 4-element RGBA vector  | 
      
        
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           rgba_to_hex()  
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        Convert a 4-element rgba vector to hex RGB  | 
      
        
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           stroke_style()  
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        Construct a vector of styles related to 'stroke'  | 
      
        
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           style_string()  
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        Create CSS styles for the given attributes  | 
      
        
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           svg_callback()  
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        The main SVG callback.  | 
      
        
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           svg_strWidth()  
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        Return the width of the given string  | 
      
        
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           svgout()  
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        SVG device written in R.  | 
      
        
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           transformer_round()  
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        Transformer for glue to round numeric values to decimal places and convert NULL to text  |