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OpenGL ES Extension #71 (became core in ES 3.0) OpenGL ES Extension #36, extended in ES 3.0 and 3.1

OpenGL ES Extension #35, extended in ES 3.0 and 3.1 OES_texture_float_linear OES_texture_half_float_linear OpenGL ES Extension #34 (became core in ES 3.0) OpenGL ES Extension #87 (different for 1.1) OpenGL ES Extension #23 (different for 1.1) The Khronos Group has written a document describing the differences between OpenGL ES 2.0 and ordinary OpenGL 2.0. Some incompatibilities between the desktop version of OpenGL and OpenGL ES 2.0 persisted until OpenGL 4.1, which added the GL_ARB_ES2_compatibility extension. As a result, OpenGL ES 2.0 is not backward compatible with OpenGL ES 1.1. Almost all rendering features of the transform and lighting stage, such as the specification of materials and light parameters formerly specified by the fixed-function API, are replaced by shaders written by the graphics programmer. Control flow in shaders is generally limited to forward branching and to loops where the maximum number of iterations can easily be determined at compile time. It is roughly based on OpenGL 2.0, but it eliminates most of the fixed-function rendering pipeline in favor of a programmable one in a move similar to the transition from OpenGL 3.0 to 3.1. OpenGL ES 2.0 was publicly released in March 2007. OpenGL ES Extension #10 (became core in ES 2.0) OpenGL ES 1.1 added features such as mandatory support for multitexture, better multitexture support (including combiners and dot product texture operations), automatic mipmap generation, vertex buffer objects, state queries, user clip planes, and greater control over point rendering. and some material parameters were removed, including back-face parameters and user-defined clip planes.display lists and feedback are removed, as are push and pop operations for state attributes.bitmap operations for copying pixels individually, evaluators, and user selection operations are not allowed.several of the more technical drawing modes are eliminated, including frontbuffer and accumulation buffer.ARB_Image pixel class operations, bitmaps, and 3D textures are not supported.polygon mode and antialiased polygon rendering are not supported, although rendering using multisample is still possible (rather than alpha border fragments).

Many other functions and rendering primitives were removed in version 1.0 to produce a lightweight interface, including: Attributes were also added to better support the computational abilities of embedded processors, which often lack a floating point unit (FPU). Other significant differences are that the calling semantics for primitive rendering functions were changed in favor of vertex arrays, and fixed-point data types were introduced for vertex coordinates. One significant difference between OpenGL and OpenGL ES is that OpenGL ES removed the need to bracket OpenGL library calls with glBegin and glEnd. OpenGL ES 1.0 is based on the original OpenGL 1.3 API, with much functionality removed and a little bit added. OpenGL ES 1.0 was released publicly July 28, 2003. Version 1.0 and 1.1 both have common (CM) and common lite (CL) profiles, the difference being that the common lite profile only supports fixed-point instead of floating point data type support, whereas common supports both. OpenGL ES comes with its own version of shading language (OpenGL ES SL), which is different from OpenGL SL.

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This means that, for example, an application written for OpenGL ES 1.0 should be easily portable to the desktop OpenGL 1.3 as the OpenGL ES is a stripped-down version of the API, the reverse may or may not be true, depending on the particular features used. OpenGL ES 1.0 is drawn up against the OpenGL 1.3 specification, OpenGL ES 1.1 is defined relative to the OpenGL 1.5 specification and OpenGL ES 2.0 is defined relative to the OpenGL 2.0 specification. Several versions of the OpenGL ES specification now exist.

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Vulkan, a next-generation API from Khronos, is made for simpler high performance drivers for mobile and desktop devices. OpenGL ES is managed by the non-profit technology consortium Khronos Group. The GLU library and the original GLUT are not available for OpenGL ES, freeglut however, supports it. The API is cross-language and multi-platform. OpenGL ES is the 'most widely deployed 3D graphics API in history'. It is designed for embedded systems like smartphones, tablet computers, video game consoles and PDAs. OpenGL for Embedded Systems ( OpenGL ES or GLES) is a subset of the OpenGL computer graphics rendering application programming interface (API) for rendering 2D and 3D computer graphics such as those used by video games, typically hardware-accelerated using a graphics processing unit (GPU).

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