Function uploadTextureData

tfjs-react-native/src/camera/camera_webgl_util.ts:108–142

(
    imageData: Uint8Array, gl: WebGL2RenderingContext, dims: Dimensions,
    texture?: WebGLTexture)

 *     texture will be returned
 */
export function uploadTextureData(
    imageData: Uint8Array, gl: WebGL2RenderingContext, dims: Dimensions,
    texture?: WebGLTexture): WebGLTexture {
  const targetTextureWidth = dims.width;
  const targetTextureHeight = dims.height;

  tf.util.assert(
      targetTextureWidth * targetTextureHeight * dims.depth ===
          imageData.length,
      () => 'uploadTextureData Error: imageData length must match w * h * d');

  const targetTexture = texture || gl.createTexture();
  gl.activeTexture(gl.TEXTURE0);
  gl.bindTexture(gl.TEXTURE_2D, targetTexture);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  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);

  const level = 0;
  const format = dims.depth === 3 ? gl.RGB : gl.RGBA;
  const internalFormat = format;
  const border = 0;
  const type = gl.UNSIGNED_BYTE;

  webgl_util.callAndCheck(gl, () => {
    gl.texImage2D(
        gl.TEXTURE_2D, level, internalFormat, targetTextureWidth,
        targetTextureHeight, border, format, type, imageData);
  });

  gl.bindTexture(gl.TEXTURE_2D, null);
  return targetTexture;
}

/**
 * Render a texture to the default framebuffer (i.e. screen)