There are many alternatives to OpenGL for Linux if you are looking for a replacement. The best free Linux alternative is Vulkan, which is also Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to OpenGL and six of them are free and available for Linux so hopefully you can find a suitable replacement. Other interesting free Linux alternatives to OpenGL are Amethyst Game Engine, ANGLE, Crystal Space and Allegro.
Vulkan is a new generation graphics and compute API that provides high-efficiency, cross-platform access to modern GPUs used in a wide variety of devices from PCs and consoles to mobile phones and embedded platforms.
Amethyst uses gfx-rs to render graphics with Vulkan or Metal. It is meant to be used for 2D and 3D, with various utilities for both types of games. It should be beginner friendly but also allow more advanced uses such as custom render passes and GLSL shaders.
The goal of ANGLE is to allow users of multiple operating systems to seamlessly run WebGL and other OpenGL ES content by translating OpenGL ES API calls to one of the hardware-supported APIs available for that platform. ANGLE currently provides translation from OpenGL ES 2.0, 3.
Crystal Space is a mature, full-featured Software Development Kit (SDK) providing real-time 3D graphics for applications such as games and virtual reality. It is free (LGPL) and cross-platform (Windows, GNU/Linux, Mac OS X).
Allegro 4 and Allegro 5 are cross-platform, libraries mainly aimed at video game and multimedia programming. They handle common, low-level tasks such as creating windows, accepting user input, loading data, drawing images, playing sounds, etc.
Mesa is a software library for 3D computer graphics that provides a generic Khronos-compliant OpenGL implementation for rendering three-dimensional graphics on multiple platforms.
United States
I spent half a year studying this wretched API and was very disappointed, it is not designed to work with graphics.
This API is made only for implementation in ready-made solutions on opengl to slightly increase the number of frames per second (+5 - +10) in exchange for really titanic efforts (unreadable code in> 10,000 lines).
Unfortunately, Vulkan API - fail. Better try DirectX.