Implementing OpenGL ES on OpenGL

We present an OpenGL ES implementation which utilizes the existing OpenGL library, aiming to support various embedded systems in current consumer markets. Nowadays OpenGL ES becomes an improved version of OpenGL for embedded systems through introducing new features including the fixed-point numeric type. We optimized arithmetic operations on its specific data types such as fixed-point numbers, and achieved totally new optimized implementations of newly introduced features. Efficient ways of parameter conversions between our OpenGL ES implementation and underlying OpenGL are also accomplished even with strictly obeying the standard specifications. Our final implementation result of OpenGL ES 1.1 library completely provides more than 200 API functions in the standard specification and satisfies all the conformance tests. From the efficiency point of view, we compared execution speeds of real world applications to existing commercial implementations to finally show at most 33.147 times speed-ups, which is fastest among the same category implementations.