Cogl aims to give developers high performance access to modern graphics hardware, exposing the low level features in a portable API that runs on Linux, Windows, OSX, Android and now even in your web browser.
With Cogl we've tried to re-think GPU graphics API design and - for example - depart from the state machine style of OpenGL, instead letting you directly manage and access your state via objects. The upshot of this approach is that it's easy to write orthogonal and re-usable rendering components with Cogl.
Cogl aims to really be useful for graphics work which means more than just raw access to the GPU. Cogl provides the essential utilities needed to really get things done, such as math utilities, texture utilities, text rendering, video integration, gles2 integration, path tessellation. Most of these utilities are optional though, so you can choose to use as much or as little as is necessary for your work.
We are currently working our way towards a Cogl 2.0 release, so if you are interested in GPU graphics, perhaps with some experience using OpenGL or D3D for game development then now is a good time to get involved and give us feedback about how the API is coming along.