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| A raster drawing environment, essentially a graphics context. Similar in some ways to a configuration, but provides drawing defaults. Every option is realized as a function <option_name>(new_value), both with no return value or self, to enable option chaining. Options taking magic strings as options are realized as sets of option_value procedures i.e. to enable solid linestyle call 'linestyle_solid' this applies to capstyle, fillstyle, function, linestyle and joinstyle. disadvantage: bloated interface
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Usage:
___env.background("yellow").foreground("blue").linewidth(10);
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