FORKED TO USE A DIFFERENT OPENGL DEPENDENCY: Extra special effects, such as shader, for the Gosu game-development library

Adds some functionalities to the Ruby Gosu framework

Vector-based shadows for circles and axis-aligned rectangles in the Gosu graphics library.

Replaces pure-ruby OpenGL API calls in opengl-bindings ( https://github.com/vaiorabbit/ruby-opengl ) with native C function calls. Notice: This library provides native extension. You must setup development environment (or DevKit) before installation.