rollup-plugin-glsl-optimize/src/lib/minify.js

Import GLSL source files as strings. Pre-processed, validated and optimized with Khronos Group SPIRV-Tools. Supports glslify.

/*
  Originally from https://github.com/vwochnik/rollup-plugin-glsl
  MIT License
  Copyright (c) Vincent Wochnik <v.wochnik@gmail.com>
*/

/** @internal */
export function compressShader(code) {
  let needNewline = false;
  return code.replace(/\\(?:\r\n|\n\r|\n|\r)|\/\*.*?\*\/|\/\/(?:\\(?:\r\n|\n\r|\n|\r)|[^\n\r])*/g, '')
      .split(/\n+/).reduce((result, line) => {
        line = line.trim().replace(/\s{2,}|\t/, ' ');
        if (line.charAt(0) === '#') {
          if (needNewline) {
            result.push('\n');
          }
          result.push(line, '\n');
          needNewline = false;
        } else {
          result.push(line.replace(/\s*({|}|=|\*|,|\+|\/|>|<|&|\||\[|\]|\(|\)|-|!|;)\s*/g, '$1'));
          needNewline = true;
        }
        return result;
      }, []).join('').replace(/\n+/g, '\n');
}