_e1DdZddlZddlZddlmZmZmZddlmZejdZ Gdde Z Gdd e Z Gd d e ZGd d e ZddlmZdZej&r ddlmZmZmZddlmZmZmZmZddlmZmZecGdde ZGddeZGddeZGddeZGddeZGddeZGdd eZGd!d"eZGd#d$eZGd%d&eZ!y#e$rZe jAddZYdZ[dZ[wwxYw)'z*Implementations for common converter typesN)bytesunicodeas_8_bit)NULLzOpenGL.convertersc$eZdZdZdZdZdZdZy) ConverteraBase class for Converter types Converter objects are callable objects used with the OpenGL.wrapper.Wrapper class to simplify the wrapping of functions by collecting commonly used functionality into a reusable function. Each Converter has two (class) attributes: argNames -- list of argument names for initialisation indexLookups -- set of (indexname, argName,methodName) values to lookup on wrapper. These allow us to use argument-name references to refer to which arguments to use when processing (prevents the need to revise pointers when we change the API for a function). 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