> For the complete documentation index, see [llms.txt](https://desertcookie.gitbook.io/glfw-in-a-nutshell/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://desertcookie.gitbook.io/glfw-in-a-nutshell/contexts/opengl.md).

# OpenGL (ES)

Creating GLFW contexts for OpenGL and OpenGL ES

## Context Creation

After window creation, the created OpenGL context object needs to be made the current context by calling `glfwMakeContextCurrent(window)`. This binds the context object to the current thread. In situations where multithreading is required, a [shared context](https://app.gitbook.com/@desertcookie/s/glfw-in-a-nutshell/contexts/context-basics#context-sharing) has to bee created. The current context can be retrieved with `glfwGetCurrentContext`, which returns the window containing the [context object](https://app.gitbook.com/@desertcookie/s/glfw-in-a-nutshell/contexts/context-basics#context-objects).\
The first step of working with OpenGL would now be to create the OpenGL capabilities by calling `glCreateCapabilities`.

## Extensions

TODO (see [here](https://glfw.org/docs/latest/context_guide.html#context_glext) for now)