const img = new Image();
img.onload = function () {
// 创建纹理对象
const texture = gl.createTexture();
// 翻转 图片 Y轴
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1)
// 开启一个纹理单元
gl.activeTexture(gl.TEXTURE0)

  gl.bindTexture(gl.TEXTURE_2D, texture)
  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, img)
  gl.uniform1i(uSampler, 0)
  gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4)
}
img.src = '../assets/qiche.jpeg'