In contrast, OpenGL ES 1.1 is based on OpenGL 1.x with some APIs removed and fixed point integer support added. OpenGL 2.0 adds programmable shaders, but fixed function pipeline API is still supported for backward compatibility. OpenGL 1.0 has fixed shaders and fixed function API for using them. The following diagram shows the relationship of the major OpenGL versions and variants. OpenGL ES is a subset of the full OpenGL standard, and therefore the two APIs are not directly compatible. Hardware accelerated OpenGL ES 1.1 and 2.0 are available on Maemo devices beginning with the N900. OpenGL ES is an API that allows programmers to draw 3D graphics on mobile and embedded devices.
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