Apparatus and method for rendering

PURPOSE: A rendering device and a method thereof are provided to reduce context loading numbers and to effectively use a bandwidth between an internal memory and an external memory. CONSTITUTION: A usage number determination unit (510) determines total usage numbers related to target context. A memory update unit (520) loads the target context from an external memory to an internal memory. A usage number update unit (530) uses the target context in the rendering of each tile to update the residual usage number of the target context. The target context includes texture information for rendering a target object corresponding to the target context; information which is necessary for calculating pixel shader for a target object; and state information for the target object. [Reference numerals] (510) User number determination unit; (520) Memory update unit; (530) Usage number update unit; (540) External memory; (550) Internal memory; (560) Rendering engine