Method constructor

gpu-pipeline/webgl/gl-class.js:152–154

(gl)

// A GPU processing step.
class MaskStep {
    constructor(gl) {
      this.proc = new GlShaderProcessor(gl, MASK_SHADER);
    }
    process(frame, mask) {
      this.proc.startProcessFrame(frame.width, frame.height);
      this.proc.bindTextures(