Gets the value of a #version statement from a set of GLSL tokens, or returns null if no version is defined.
var tokenize = require('glsl-tokenizer')
var getVersion = require('glsl-token-extract-version')
var source = `
#version 300 es // WebGL 2
out vec4 fragColor;
void main() {
fragColor = vec4(1.0);
}
`
var version = getVersion(tokenize(source))
//=> "300 es"
For the given list of GLSL tokens, finds a preprocessor statement that matches a #version regex. Normalizes multiple whitespace into a single space, and returns the string value, such as "300 es" or "100".
If no #version statement exists, returns null.
MIT, see LICENSE.md for details.