OpenGL 4 Shading Language Cookbook - Third Edition

How it works...

The glShaderBinary function provides us with the ability to load shaders that have been compiled to the SPIR-V format. This part is fairly straightforward.

The function that might be a bit more confusing is glSpecializeShader. We are required to call this function before the shader stage can be linked. This call is needed because a single SPIR-V file can have multiple entry points, and SPIR-V files can have specialization constants, which are parameters that the user can provide before it is compiled into native code. 

At a minimum, we need to define the entry point for our shader. Since the source language is GLSL, the entry point is main. We specify the entry point(s) via the second argument. For GLSL, we simply use the  ...