Method _initShader

src/webgl/p5.RendererGL.js:1099–1135

(shader)

  }

  _initShader(shader) {
    const gl = this.GL;

    const vertShader = gl.createShader(gl.VERTEX_SHADER);
    gl.shaderSource(vertShader, shader.vertSrc());
    gl.compileShader(vertShader);
    if (!gl.getShaderParameter(vertShader, gl.COMPILE_STATUS)) {
      throw new Error(`Yikes! An error occurred compiling the vertex shader: ${
        gl.getShaderInfoLog(vertShader)
      } in:\n\n${shader.vertSrc()}`);
    }

    const fragShader = gl.createShader(gl.FRAGMENT_SHADER);
    gl.shaderSource(fragShader, shader.fragSrc());
    gl.compileShader(fragShader);
    if (!gl.getShaderParameter(fragShader, gl.COMPILE_STATUS)) {
      throw new Error(`Darn! An error occurred compiling the fragment shader: ${
        gl.getShaderInfoLog(fragShader)
      }`);
    }

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

    if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
      throw new Error(
        `Snap! Error linking shader program: ${gl.getProgramInfoLog(program)}`
      );
    }

    shader._compiled = true;
    shader._glProgram = program;
    shader._vertShader = vertShader;
    shader._fragShader = fragShader;
  }

  _finalizeShader() {}