Method build

src/backend/web-gl/kernel.js:478–590

()

  }

  build() {
    if (this.built) return;
    this.initExtensions();
    this.validateSettings(arguments);
    this.setupConstants(arguments);
    if (this.fallbackRequested) return;
    this.setupArguments(arguments);
    if (this.fallbackRequested) return;
    this.updateMaxTexSize();
    this.translateSource();
    const failureResult = this.pickRenderStrategy(arguments);
    if (failureResult) {
      return failureResult;
    }
    const { texSize, context: gl, canvas } = this;
    gl.enable(gl.SCISSOR_TEST);
    if (this.pipeline && this.precision === 'single') {
      gl.viewport(0, 0, this.maxTexSize[0], this.maxTexSize[1]);
      canvas.width = this.maxTexSize[0];
      canvas.height = this.maxTexSize[1];
    } else {
      gl.viewport(0, 0, this.maxTexSize[0], this.maxTexSize[1]);
      canvas.width = this.maxTexSize[0];
      canvas.height = this.maxTexSize[1];
    }
    const threadDim = this.threadDim = Array.from(this.output);
    while (threadDim.length < 3) {
      threadDim.push(1);
    }

    const compiledVertexShader = this.getVertexShader(arguments);
    const vertShader = gl.createShader(gl.VERTEX_SHADER);
    gl.shaderSource(vertShader, compiledVertexShader);
    gl.compileShader(vertShader);
    this.vertShader = vertShader;

    const compiledFragmentShader = this.getFragmentShader(arguments);
    const fragShader = gl.createShader(gl.FRAGMENT_SHADER);
    gl.shaderSource(fragShader, compiledFragmentShader);
    gl.compileShader(fragShader);
    this.fragShader = fragShader;

    if (this.debug) {
      console.log('GLSL Shader Output:');
      console.log(compiledFragmentShader);
    }

    if (!gl.getShaderParameter(vertShader, gl.COMPILE_STATUS)) {
      throw new Error('Error compiling vertex shader: ' + gl.getShaderInfoLog(vertShader));
    }
    if (!gl.getShaderParameter(fragShader, gl.COMPILE_STATUS)) {
      throw new Error('Error compiling fragment shader: ' + gl.getShaderInfoLog(fragShader));
    }

    const program = this.program = gl.createProgram();
    gl.attachShader(program, vertShader);
    gl.attachShader(program, fragShader);
    gl.linkProgram(program);