Graphics library

This typically involves providing optimized versions of functions that handle common rendering tasks.

By employing these functions, a program can assemble an image to be output to a monitor.

This relieves the programmer of the task of creating and optimizing these functions, and allows them to focus on building the graphics program.

The use of graphics libraries in connection with video production systems, such as Pixar RenderMan, is not covered here.

Some APIs use Graphics Library (GL) in their name, notably OpenGL and WebGL.