Summary of Functionality differences from version 1.3
Minor wording changes, clarifications, and examples added or changed to keep in sync with the OpenGL
ES specification.
The following features are added or changed:
• Add uniform blocks and layouts to be backed by the application through buffer bindings.
• Rectangular textures, including the closure of t he functionality indicated by the original
texture_rectangle extension, the gpu_shader4 extension and the 1.3 version of GLSL.
• Texture buffers .
• Add gl_InstanceID for instance drawing.
• Don't require writing to gl_Position.