At GDC the Khronos Group announced not one but two new OpenGL specifications. The headline release, OpenGL 4, includes a raft of new features bringing OpenGL in line with Microsoft's Direct3D specification. OpenGL 3.3 was also released, providing as many of the new version 4 features as possible to older hardware.

The Khronos Group, the consortium of hardware and software companies that governs OpenGL, OpenCL, and other related specifications, made no bones about its intentions for OpenGL 4: providing standardized support for Direct3D 11 features to OpenGL developers was the prime concern. Direct3D 11 integrated two key features into the graphics pipeline: hardware tessellation and compute shaders. The former allows the video card to synthesize polygons programmatically, enabling considerably smoother, more natural looking curved surfaces. The latter is a key part in the development of using the GPU for general-purpose computation (GPGPU)—not just for producing graphics, but for performing various kinds of high-performance math.



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