Shader language custom features

[mouse0w0]

A Shader Language preprocessor processes the shader code to add some custom features.

'#include''#import' statement

Include statement to include the code of another shader file into the code of current shader file. For example:

#import "library/another.shader"

Collecting shader information

Collecting the shader source code information into the data structure. Including but not limited to uniforms, vertex attributes, ins, outs, consts, functions.

[cvrunmin]

#include can only be supported if the graphics card has this extension supported: GL_ARB_shading_language_include
If we have to support this on any cards, we do need some tricks to simulate it

[mouse0w0]

#include can only be supported if the graphics card has this extension supported: GL_ARB_shading_language_include

No, I want to preprocess this statement before compiling shader code.

[cvrunmin]

decided to refer https://github.com/KhronosGroup/glslang for 'collecting shader information' to help us build the parser