export const fragmentSource = `
  precision highp float;
  uniform sampler2D uTexture;
  uniform vec3 uGamma;
  varying vec2 vTexCoord;
  void main() {
    vec4 color = texture2D(uTexture, vTexCoord);
    vec3 correction = (1.0 / uGamma);
    color.r = pow(color.r, correction.r);
    color.g = pow(color.g, correction.g);
    color.b = pow(color.b, correction.b);
    gl_FragColor = color;
    gl_FragColor.rgb *= color.a;
  }
`;